WO2024093726A1 - Communication method, apparatus and system - Google Patents
Communication method, apparatus and system Download PDFInfo
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- WO2024093726A1 WO2024093726A1 PCT/CN2023/126171 CN2023126171W WO2024093726A1 WO 2024093726 A1 WO2024093726 A1 WO 2024093726A1 CN 2023126171 W CN2023126171 W CN 2023126171W WO 2024093726 A1 WO2024093726 A1 WO 2024093726A1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/10—Architectures or entities
- H04L65/1016—IP multimedia subsystem [IMS]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/1066—Session management
- H04L65/1069—Session establishment or de-establishment
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/80—Responding to QoS
Definitions
- the present application relates to the field of communication technology, and in particular to a communication method, device and system.
- IP Internet protocol
- IMS Internet protocol multimedia subsystem
- user devices can establish data channels to download data channel applications (DC App) and transmit data of data channel applications, thereby obtaining richer communication services in addition to voice calls or video calls, such as screen sharing, location sharing, and overlaying augmented reality (AR) effects.
- DC App data channel applications
- AR augmented reality
- the establishment of a data channel may have a negative impact on the call experience, such as delaying the call connection; how to reduce the negative impact of the establishment of a data channel on the call experience is an issue that needs to be considered currently.
- the present application provides a communication method, device and system, which can reduce the negative impact of establishing a data channel on the call experience.
- a communication method is provided, which can be executed by a first communication device or by a component (such as a chip or circuit) of the first communication device.
- the first communication device is used as an example for description.
- the first communication device can be a terminal device.
- the communication method includes: a first communication device receives a call response message from a second communication device, the call response message indicating that an Internet Protocol Multimedia Subsystem IMS session between the first communication device and the second communication device is established; in response to the call response message, the first communication device sends a re-invite request message to a session control function device, the re-invite request message includes first description information for establishing a first data channel, the first data channel is used to download a data channel application, and the data channel application is used for communication other than voice calls or video calls between the first communication device and the second communication device.
- the establishment process of the first data channel is initiated after the IMS session between the first communication device and the second communication device is established, thereby reducing the negative impact of the establishment of the first data channel on the call experience between the first communication device and the second communication device.
- the delay in establishing the IMS session caused by the establishment of the first data channel can be reduced, so that the call between the two communication devices can be connected as soon as possible, improving the user experience.
- the re-invite request message also includes second description information for establishing a second data channel, the second data channel is used to transmit additional communication information applied by the data channel, the first description information is used by the first communication device to establish the first data channel, and the second description information is used by the first communication device to establish the second data channel.
- the first communication device requests to establish the first data channel and the second data channel through the same re-invite request message, thereby reducing the establishment delay of the data channel and improving the user experience.
- the method further includes: the first communication device indicates that the second data channel is anchored to the data channel media function network element; or, the first communication device indicates that the second data channel is not anchored to the data channel media function network element.
- the first data channel is also used to transmit additional communication information applied by the data channel.
- the first data channel can be used to download the data channel application and to transmit additional communication information of the data channel application, so that there is no need to establish other data channels, and communication other than voice calls or video calls can be achieved between the first communication device and the second communication device, which can reduce communication delay and improve user experience.
- the IMS session is a session established through an IMS emergency call
- the second communication device is a public safety answering point
- the solution provided in the first aspect can be applied to an emergency call scenario, in which the user's alarm information can be processed as quickly as possible, thereby effectively protecting the user's statement and property safety.
- the call response message is an off-hook 200 OK response message.
- the method before the first communication device receives a call response message from the second communication device, the method further includes: the first communication device sends an initial invitation invite request message to the second communication device, and the initial invite request message is used to request the creation of the IMS session; then the call response message is a response message to the initial invite request message.
- a communication method is provided, which can be executed by a session control function device, or by a component (such as a chip or circuit, etc.) of the session control function device.
- a component such as a chip or circuit, etc.
- the execution of the session control function device is taken as an example for illustration.
- the session control function device can be a multimedia phone application server, or an emergency call session control function network element.
- the communication method includes: a session control function device receives a re-invite request message from a first communication device, the re-invite request message includes first description information for establishing the first data channel, the first data channel is used to download a data channel application, the data channel application is used to perform communications other than voice calls or video calls between the first communication device and the second communication device, and an IMS session between the first communication device and the second communication device has been established; the session control function device triggers establishment of the first data channel according to the re-invite request message.
- the process of establishing the first data channel is triggered after the IMS session between the first communication device and the second communication device is established, that is, the re-invite request message received by the session control function device is sent by the first communication device after the IMS session between the first communication device and the second communication device is established.
- the re-invite request message also includes second description information for establishing a second data channel, the second data channel is used to transmit the additional communication information, the first description information is used by the first communication device to establish the first data channel, and the second description information is used by the first communication device to establish the second data channel.
- the first communication device requests to establish the first data channel and the second data channel through the same re-invite request message, thereby reducing the establishment delay of the data channel and improving the user experience.
- the first data channel includes a first boot data channel between the first communication device and the data channel media function network element, and a second boot data channel between the second communication device and the data channel media function network element
- the second data channel includes a first application data channel between the first communication device and the data channel media function network element, and a second application data channel between the second communication device and the data channel media function network element
- the session control function device triggers the establishment of the first data channel according to the re-invite request message, including: the session control function device requests the data channel media function network element for third description information, fourth description information, fifth description information and sixth description information; wherein the third description information is used for the data channel media function network element to establish the first boot data channel, and the fourth description information is used for the data
- the data channel media function network element establishes the first application data channel
- the fifth description information is used by the data channel media function network element to establish the second guided data channel
- the sixth description information is used by the data channel media function network element to
- the first data channel includes a third boot data channel between the first communication device and the data channel media function network element, and a fourth boot data channel between the second communication device and the data channel media function network element
- the second data channel includes a third application data channel between the first communication device and the second communication device
- the session control function device triggers the establishment of the channel according to the re-invite request message, including: the session control function device requests the data channel media function network element for ninth description information and tenth description information, the ninth description information is used for the data channel media function network element to establish the third boot data channel, and the tenth description information The information is used by the data channel media function network element to establish the fourth guided data channel;
- the session control function device sends a request message to the second communication device, and the request message includes the second description information and the tenth description information;
- the session control function device receives a response message from the second communication device, and the response message includes the eleventh description information and the twelfth description information
- the first data channel is also used to transmit the additional communication information.
- the first data channel can be used to download the data channel application and to transmit additional communication information of the data channel application, so that there is no need to establish other data channels, and communication other than voice calls or video calls can be achieved between the first communication device and the second communication device, which can reduce communication delay and improve user experience.
- the session control function device is a multimedia telephone application server; before the session control function device receives a re-invite request message from the first communication device, the method also includes: the session control function device receives an initial invite request message from the first communication device, and the initial invite request message is used by the first communication device to request to establish the IMS session; the session control function device suppresses the trigger for establishing the first data channel and/or the second data channel according to the initial invite request message.
- the session control function device suppresses the triggering of establishing the first data channel and/or the second data channel during the IMS session establishment process between the first communication device and the second communication device, thereby avoiding the problem of a longer delay in establishing the IMS session between the first communication device and the second communication device due to the establishment of the first data channel and/or the second data channel, thereby improving the efficiency of the call.
- the IMS session is a session established through an IMS emergency call
- the session control network element is an emergency call session control function network element or a multimedia telephone application server
- the second communication device is a public safety answering point.
- the solution provided in the first aspect can be applied to an emergency call scenario, in which the user's alarm information can be processed as quickly as possible, thereby effectively protecting the user's statement and property safety.
- a communication method comprising: a second communication device sends a call response message to a first communication device, the call response message being used to indicate that establishment of an Internet Protocol Multimedia Subsystem (IMS) session between the first communication device and the second communication device is complete; in response to the call response message, the first communication device sends a re-invite request message, the re-invite request message comprising first description information for establishing a first data channel, the first data channel being used to download a data channel application, the data channel application being used for communication other than voice calls or video calls between the first communication device and the second communication device; the session control function device receives the re-invite request message from the first communication device; and the session control function device triggers establishment of the first data channel according to the re-invite request message.
- IMS Internet Protocol Multimedia Subsystem
- the re-invite request message also includes second description information for establishing a second data channel, the second data channel is used to transmit the additional communication information, the first description information is used by the first communication device to establish the first data channel, and the second description information is used by the first communication device to establish the second data channel.
- the first data channel includes a first boot data channel between the first communication device and the data channel media function network element, and a second boot data channel between the second communication device and the data channel media function network element
- the second data channel includes a first application data channel between the first communication device and the data channel media function network element, and a second application data channel between the second communication device and the data channel media function network element
- the session control function device triggers the establishment of the first data channel according to the re-invite request message, including: the session control function device requests the data channel media function network element for third description information, fourth description information, fifth description information and sixth description information; wherein the third description information is used for the data channel media function network element to establish the first boot data channel, and the fourth description information is used for the data channel media function network element
- the data channel media function network element establishes the first application data channel
- the fifth description information is used by the data channel media function network element to establish the second guided data channel
- the sixth description information is used by the data channel media
- the first data channel includes a third guided data channel between the first communication device and the data channel media function network element, and a fourth guided data channel between the second communication device and the data channel media function network element
- the second data channel includes a third application data channel between the first communication device and the second communication device
- the session control function device triggers the establishment of the channel according to the re-invite request message, including: the session control function device requests ninth description information and tenth description information from the data channel media function network element, the ninth description information is used by the data channel media function network element to establish the third guided data channel, and the tenth description information is used by the data channel media function network element to establish the fourth guided data channel
- the session control function device sends a request message to the second communication device, and the request message includes the second description information and the tenth description information
- the session control The functional device receives a response message from the second communication device, the response message including eleventh description information and twelfth description information, the eleventh description
- the first data channel is also used to transmit the additional communication information.
- the session control function device is a multimedia telephone application server; before the session control function device receives a re-invite request message from the first communication device, the method also includes: the session control function device receives an initial invite request message from the first communication device, and the initial invite request message is used by the first communication device to request to establish the IMS session; the session control function device suppresses the trigger to establish the first data channel and/or the second data channel according to the initial invite request message.
- the IMS session is a session established through an IMS emergency call
- the second communication device is a public safety answering point
- a communication device comprising: a transceiver module for receiving a call response message from a second communication device, the call response message indicating that an Internet Protocol Multimedia Subsystem IMS session between the first communication device and the second communication device is established; the transceiver module is also used to send a re-invite request message to a session control function device, the re-invite request message including first description information for establishing a first data channel, the first data channel being used to download a data channel application, the data channel application being used for communication other than voice calls or video calls between the first communication device and the second communication device.
- the re-invite request message also includes second description information for establishing a second data channel, the second data channel is used to transmit additional communication information applied by the data channel, the first description information is used by the first communication device to establish the first data channel, and the second description information is used by the first communication device to establish the second data channel.
- the device also includes: a processing module, used to indicate that the application data channel is anchored to the data channel media function network element; or, the first communication device indicates that the application data channel is not anchored to the data channel media function network element.
- the first data channel is also used to transmit additional communication information applied by the data channel.
- the IMS session is a session established through an IMS emergency call
- the second communication device is a public safety answering point
- the solution provided in the fourth aspect can be applied to emergency call scenarios.
- the call response message is an off-hook 200OK response message.
- the transceiver module is further used to send an initial invite request message to the second communication device, where the initial invite request message is used to request the creation of the IMS session; then the call response message is a response message to the initial invite request message.
- a communication device comprising: a transceiver module for receiving a re-invite request message from a first communication device, the re-invite request message comprising first description information for establishing the first data channel, the first data channel being used to download a data channel application, the data channel application being used to conduct communications other than voice calls or video calls between the first communication device and the second communication device, and an IMS session between the first communication device and the second communication device has been established; and a processing module for triggering the establishment of the first data channel according to the re-invite request message.
- the re-invite request message also includes second description information for establishing a second data channel, the second data channel is used to transmit the additional communication information, the first description information is used by the first communication device to establish the first data channel, and the second description information is used by the first communication device to establish the second data channel.
- the first data channel includes a first boot data channel between the first communication device and the data channel media function network element, and a second boot data channel between the second communication device and the data channel media function network element
- the second data channel includes a first application data channel between the first communication device and the data channel media function network element, and a second application data channel between the second communication device and the data channel media function network element
- the transceiver module is specifically used to request third description information, fourth description information, fifth description information and sixth description information from the data channel media function network element; wherein the third description information is used for the data channel media function network element to establish the first boot data channel, the fourth description information is used for the data channel media function network element to establish the first application data channel, the fifth description information is used for the data channel media function network element to establish the second boot data channel, and the sixth description information is used for the data channel media function network element to establish the second application data channel; the transceiver module is specifically used to A request message is sent to the second communication device
- the first data channel includes a third boot data channel between the first communication device and the data channel media function network element, and a fourth boot data channel between the second communication device and the data channel media function network element
- the second data channel includes a third application data channel between the first communication device and the second communication device
- the transceiver module is specifically used to request ninth description information and tenth description information from the data channel media function network element, the ninth description information is used for the data channel media function network element to establish the third boot data channel, and the tenth description information is used for the data channel media function network element.
- the transceiver module for establishing the fourth guided data channel is specifically used to send a request message to the second communication device, the request message includes the second description information and the tenth description information; receive a response message from the second communication device, the response message includes the eleventh description information and the twelfth description information, the eleventh description information is used by the second communication device to establish the fourth guided data channel, and the twelfth description information is used by the second communication device to establish the third application data channel; the transceiver module is also specifically used to send the ninth description information and the twelfth description information to the first communication device, and send the eleventh description information to the data channel media function network element.
- the first data channel is also used to transmit the additional communication information.
- the transceiver module is further used to receive an initial invitation invite request message from the first communication device, and the initial invite request message is used by the first communication device to request to establish the IMS session; the processing module is also used to suppress the trigger to establish the first data channel and/or the second data channel according to the initial invite request message.
- the IMS session is a session established through an IMS emergency call
- the second communication device is a public safety answering point
- the present application provides a processor for executing the method provided in the first aspect or the second aspect.
- the process of sending the above-mentioned information and obtaining/receiving the above-mentioned information in the above-mentioned method can be understood as the process of the processor outputting the above-mentioned information and the process of the processor receiving the above-mentioned information input.
- the processor When outputting the above-mentioned information, the processor outputs the above-mentioned information to the transceiver so that it can be transmitted by the transceiver. After being output by the processor, the above-mentioned information may also need to be processed in other ways before reaching the transceiver.
- the transceiver obtains/receives the above-mentioned information and inputs it into the processor. Furthermore, after the transceiver receives the above-mentioned information, the above-mentioned information may need to be processed in other ways before being input into the processor.
- the receiving request message mentioned in the above method can be understood as the processor receiving input information.
- the processor may be a processor specifically used to execute these methods, or may be a processor that executes computer instructions in a memory to execute these methods, such as a general-purpose processor.
- the memory may be a non-transitory memory, such as a read-only memory (ROM), which may be integrated with the processor on the same chip or may be separately arranged on different chips.
- ROM read-only memory
- a computer-readable storage medium which stores a program code for execution by a device, wherein the program code includes code for executing the method provided in the first aspect or the second aspect above.
- a computer program product comprising instructions is provided, and when the computer program product is run on a computer, the computer is caused to execute the method provided in the first aspect or the second aspect.
- a chip which includes a processor and a communication interface.
- the processor reads instructions stored in a memory through the communication interface to execute the method provided in the first or second aspect.
- the chip may also include a memory, in which instructions are stored, and the processor is used to execute the instructions stored in the memory.
- the processor is used to execute the method provided by the first aspect or the second aspect above.
- a communication system which includes a first communication device for executing the method shown in the first aspect, and a session control function device for executing the method shown in the second aspect.
- FIG. 1 is a schematic diagram of a network architecture applicable to an embodiment of the present application.
- FIG. 2 is a schematic diagram of another network architecture applicable to an embodiment of the present application.
- FIG3 is a schematic diagram of a data channel protocol stack applicable to an embodiment of the present application.
- FIG. 4 is a network architecture diagram of an IMS basic call supporting a data channel provided in an embodiment of the present application.
- FIG. 5 shows an exemplary flow chart of creating a data channel in an IMS basic call flow provided by an embodiment of the present application.
- FIG. 6 shows a network architecture diagram of an IMS emergency call provided in an embodiment of the present application.
- FIG. 7 is an exemplary flow chart of an IMS emergency call provided in an embodiment of the present application.
- FIG. 8 shows an exemplary flow chart of a communication method 800 provided in an embodiment of the present application.
- FIG. 9 shows an exemplary flow chart of yet another communication method 900 provided in an embodiment of the present application.
- FIG. 10 is a network architecture diagram applicable to an embodiment of the present application.
- FIG. 11 shows an exemplary flowchart of another communication method 1100 provided in an embodiment of the present application.
- FIG. 12 shows an exemplary flow chart of yet another communication method 1200 provided in an embodiment of the present application.
- FIG. 13 shows an exemplary flowchart of yet another communication method 1300 provided in an embodiment of the present application.
- FIG. 14 shows an exemplary flowchart of yet another communication method 1400 provided in an embodiment of the present application.
- FIG. 15 shows an exemplary flowchart of yet another communication method 1500 provided in an embodiment of the present application.
- FIG. 16 is another network architecture diagram applicable to an embodiment of the present application.
- FIG. 17 shows an exemplary flowchart of another communication method 1700 provided in an embodiment of the present application.
- FIG. 18 shows an exemplary flowchart of yet another communication method 1800 provided in an embodiment of the present application.
- FIG. 19 shows an exemplary flowchart of yet another communication method 1900 provided in an embodiment of the present application.
- FIG. 20 shows an exemplary flowchart of yet another communication method 2000 provided in an embodiment of the present application.
- FIG. 21 shows an exemplary flowchart of yet another communication method 2100 provided in an embodiment of the present application.
- FIG. 22 is a schematic block diagram of a communication device provided by an embodiment of the present application.
- FIG23 is a schematic block diagram of a communication device provided in another embodiment of the present application.
- FIG24 is a schematic block diagram of a communication device provided in yet another embodiment of the present application.
- the technical solution provided in this application can be applied to various communication systems, such as: the fifth generation (5th generation, 5G) communication system (or called the new radio (new radio, NR) system), the fourth generation (4th generation, 4G) communication system (or called the long term evolution (long term evolution, LTE) system), LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD) system, etc.
- the technical solution provided in this application can also be applied to future communication systems, such as the sixth generation (6th generation, 6G) mobile communication system.
- the first communication device and the second communication device communicate with each other through an IP multimedia subsystem.
- the first communication device is a calling device (i.e., a device initiating a call)
- the second communication device is a called device (i.e., a device being called).
- the IMS network may be a collection of multiple devices capable of processing voice and multimedia services, and may also be understood as a collection of multiple servers capable of processing audio, video and multimedia services.
- the IMS network may include one or more network devices, such as a call session control function (CSCF) network element, an IMS access media gateway (AGW), a data channel signaling function (DCSF) network element, a data channel media function (DCMF) network element, a home subscriber server (HSS), etc.
- CSCF call session control function
- AGW IMS access media gateway
- DCSF data channel signaling function
- DCMF data channel media function
- HSS home subscriber server
- the first communication device when used as a calling device, it can be any electronic device with a call function.
- the first communication device is a user equipment (UE), and the UE can be any device that can access the network, and can also be called terminal equipment (terminal equipment), terminal device, access terminal, user unit, user station, mobile station, mobile station (MS), mobile terminal (MT), remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.
- UE can be a device that provides voice/data connectivity to users, for example, a handheld device with wireless connection function, a vehicle-mounted device, etc.
- terminals can be: mobile phones, tablet computers, computers with wireless transceiver functions (such as laptops, PDAs, etc.), mobile Internet devices (mobile internet device, MID), virtual reality (virtual reality, VR) equipment, AR equipment, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical, wireless terminals in smart grid, wireless terminals in transportation safety, wireless terminals in smart city (sm
- the invention relates to wireless terminals in art city, wireless terminals in smart home, cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDA), handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, terminal devices in 4G/5G networks or terminal devices in future evolved public land mobile communication networks (PLMN), etc.
- mobile Internet devices mobile internet device, MID
- virtual reality (virtual reality, VR) equipment AR equipment
- wireless terminals in industrial control wireless terminals in
- UE can also be a UE in the Internet of Things (IoT) system.
- IoT Internet of Things
- Its main technical feature is to connect objects to the network through communication technology, thereby realizing an intelligent network of human-machine interconnection and object-object interconnection.
- IoT technology can achieve massive connections, deep coverage, and terminal power saving through narrowband (NB) technology, for example.
- NB narrowband
- UE can also include smart printers, train detectors, etc. Its main functions include collecting data (part of the terminal equipment), receiving control information and downlink data from network equipment, and sending electromagnetic waves to transmit uplink data to network equipment.
- the UE can be used to act as a base station.
- the user equipment can act as a scheduling entity that provides sidelink signals between user equipment in vehicle to everything (V2X) or device to device (D2D).
- V2X vehicle to everything
- D2D device to device
- a cell phone and a car communicate with each other using sidelink signals.
- a cell phone and a smart home device communicate with each other without relaying the communication signal through a base station.
- the second communication device when it acts as a called device, it can be any electronic device with a call function.
- the second communication device is a user device, or the second communication device is a public safety answering point (such as PSAP) in an IMS emergency call scenario (i.e., communication device 1 initiates an IMS emergency call (emergency call) to communication device 2), or any electronic device with a call function under a public safety answering point.
- PSAP public safety answering point
- the above-mentioned network architecture applied to the embodiment of the present application is only an example, and the network architecture applicable to the embodiment of the present application is not limited to this. Any network architecture that can realize the functions of the above-mentioned network elements is applicable to the embodiment of the present application, that is, the network architecture and business scenarios described in the embodiment of the present application are for the purpose of more clearly illustrating the technical solution of the embodiment of the present application, and do not constitute a limitation on the technical solution provided in the embodiment of the present application. Ordinary technicians in this field can know that with the evolution of network architecture and the emergence of new business scenarios, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems.
- network elements or devices listed in the above network architecture are only exemplary, and the network architecture applicable to the present application may also include other network elements or devices, which is not limited in the present application.
- the communication device in the embodiment of the present application includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer.
- the hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and a memory (also called main memory).
- the operating system can be any one or more of the following: (Process) A computer operating system that implements business processing, such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a Windows operating system.
- the application layer includes applications such as browsers, address books, word processing software, and instant messaging software.
- the embodiments of the present application do not specifically limit the specific structure of the execution subject of the method provided in the embodiments of the present application.
- the execution subject of the method provided in the embodiments of the present application may be a terminal device or a network device, or a functional module in a terminal device or a network device that can call and execute a program.
- computer-readable media may include, but are not limited to: magnetic storage devices (e.g., hard disks, floppy disks or tapes, etc.), optical disks (e.g., compact discs (CDs), digital versatile discs (DVDs), etc.), smart cards and flash memory devices (e.g., erasable programmable read-only memory (EPROM), cards, sticks or key drives, etc.).
- magnetic storage devices e.g., hard disks, floppy disks or tapes, etc.
- optical disks e.g., compact discs (CDs), digital versatile discs (DVDs), etc.
- smart cards and flash memory devices e.g., erasable programmable read-only memory (EPROM), cards, sticks or key drives, etc.
- various storage media described herein may represent one or more devices and/or other machine-readable media for storing information.
- machine-readable medium may include, but is not limited to, wireless channels and various other media capable of storing, containing and/or carrying instructions and/or data.
- the IMS session described in the embodiment of the present application refers to a service in which a communication device participates as a caller or a called party and conducts a voice call or a video call with one or more other communication devices through a network element in the IMS.
- An IMS session may also be referred to as an IMS call, or an IMS call, etc.
- An IMS session may cover the entire process from the start of dialing to the end of a call, or may cover a portion of the process from the start of dialing to the end of a call, such as the process from when the parties involved in the IMS session enter a call state to when the call ends.
- An IMS session can be a one-to-one session or a one-to-many session (such as a conference).
- the embodiment of the present application takes the one-to-one session as an example, but related solutions can also be used in the one-to-many session.
- the voice call described in the embodiment of the present application refers to a call between user devices of each participant in an IMS session through real-time transmission of audio content to achieve the purpose of voice interaction;
- the video call described in the embodiment of the present application refers to a call between user devices of each participant in an IMS session through real-time transmission of audio content and/or video content to achieve the purpose of video interaction.
- Voice calls and video calls can be collectively referred to as audio and video calls.
- the additional communication information described in the embodiment of the present application is used for communication between the devices of the various participants in the IMS session other than voice calls or video calls.
- the additional communication information is information used for communication between the devices of the various participants in the IMS call service other than audio and video interaction content.
- the additional communication information may include at least one of the following: content captured by a camera of a user device, information generated by a thumb up, information generated by sending a red envelope, desktop sharing content, marks drawn by a user on the screen, text messages input by a user, picture information input by a user, geographic location information, or video content in a video file, etc.
- Such information may be produced or consumed by any one of the calling party terminal device or the called party terminal device, or may be produced or consumed by a device connected to the calling party terminal device or the called party terminal device.
- the additional communication information can be transmitted (sent or received) through the data channel by the data channel application on the terminal device of the participant of the IMS session, and processed accordingly (presented, controlled, etc.).
- the data channel in the embodiment of the present application is also referred to as an IMS data channel (IMS data channel), that is, the data channel in IMS, which can be used to transmit data based on the stream control transmission protocol (SCTP); that is, the data channel is a logical channel or data connection based on SCTP to transmit data.
- IMS data channel IMS data channel
- SCTP stream control transmission protocol
- DC can provide users with richer real-time interactive services in addition to audio and video calls.
- terminal devices in the same IMS session service such as UE 1 and UE 2 in Figure 2
- determine the IP addresses and ports used by both terminal devices to transmit data establish key information required for datagram transport layer security (DTLS) coupling and stream control transmission protocol (SCTP) coupling, and description information corresponding to the data channel through the SIP/session description protocol (SDP) media negotiation process of IMS, thereby establishing one or more data channels for parallel transmission with audio (Speech) and video (Video) in the IMS session (such as the data channels shown in Figure 2 or Figure 3, where Figure 3 shows a method of transmitting data in parallel with audio (Speech) and video (Video)).
- DTLS datagram transport layer security
- SCTP stream control transmission protocol
- SDP SIP/session description protocol
- UE 1 and UE 2 can download various applications (i.e., DC App) from the network-side DCSF through the data channel, and run these applications before, during, or after the audio or video call.
- DC App applications
- UE 1 and UE 2 can communicate with each other in addition to voice or video calls, such as screen sharing, simultaneous translation, location sharing, superimposed AR special effects, and even synchronized immersive interactions such as hearing, vision, and touch, so as to enhance the user experience.
- data channels can be divided into two types: bootstrap data channel (BDC) and application data channel (ADC).
- BDC bootstrap data channel
- ADC application data channel
- BDC is used by terminal devices to obtain DC App from DCSF.
- Terminal equipment that supports data channel capabilities can establish BDC with the DCSF of the call origination network and/or the DCSF of the call termination network.
- the specific method depends on whether each network supports data channel capabilities and the service contract status of the terminal equipment of both parties in their respective networks.
- BDC can only transmit data using the hypertext transfer protocol (HTTP), and the stream ID value of BDC is less than 1000.
- HTTP hypertext transfer protocol
- ADC is used to transmit the interactive data generated by the DC App running on both communicating parties.
- ADC is established between the terminal devices of the two communicating parties.
- ADC is used to transmit the interactive data generated by the DC App running on the terminal devices of the two communicating parties.
- ADC can transmit data using any protocol, and the ADC stream ID value is greater than or equal to 1000.
- Fig. 4 shows an IMS session network architecture diagram applicable to an embodiment of the present application that supports data channels. The following briefly introduces some network elements or devices involved in the network architecture shown in Fig. 4.
- CSCF Call session control function
- the CSCF can communicate with the terminal device, and the CSCF can communicate with the gateway device.
- the CSCF can select a gateway device to communicate with the terminal device, and the CSCF can allocate routing information, such as an IP address or port, to the terminal device and the gateway device.
- CSCF is divided into proxy CSCF (P-CSCF), interrogating CSCF (I-CSCF), serving CSCF (S-CSCF), etc. according to its function.
- P-CSCF proxy CSCF
- I-CSCF interrogating CSCF
- S-CSCF serving CSCF
- P-CSCF is the entry point for users to access the IMS network, and is mainly responsible for forwarding SIP signaling between IMS users and their home networks.
- I-CSCF is the unified entry point for IMS users' home networks, and is responsible for allocating or querying S-CSCFs that serve users.
- S-CSCF is the unified entry point for IMS users' home networks, and is responsible for allocating or querying S-CSCFs that serve users.
- P-CSCF P-CSCF
- S-CSCF S-CSCF
- I-CSCF I-CSCF
- IMS-access media gateway IMS-AGW can provide IMS network access gateway and media gateway functions.
- IMS core CSCF and IMS AGW can be collectively referred to as IMS core. This application does not limit the signaling interaction method between network elements in the IMS core.
- DCSF Data channel signaling function
- DCS data channel server
- DCMF Data channel media function
- MMTel AS is an application layer device located at the upper layer of the IMS system, providing basic and supplementary services, such as multimedia conferencing, converged communications, SMS gateways, standard switchboards, and other services.
- the IMS network is an open system based on IP bearer that provides users with various multimedia services.
- MMTel AS interacts with CSCF to trigger and execute various network services.
- MMTel AS supports DC interaction of IMS sessions, that is, MMTel AS can establish data channels for terminal devices.
- MMTel AS can be called a session control function device, which is used to control the establishment process of data channels.
- the data channel application described in the embodiment of the present application is used to pass through the data channel between multiple terminal devices in the same IMS call service Transmit additional communication information.
- the data channel application is a web content that includes hypertext markup language (HTML), JavaScript scripts, images, and cascading style sheets (CSS), describes a graphical user interface (UI), and can implement interactive business logic.
- the data channel application is usually downloaded from the network side by the call application on the terminal device and runs during the IMS call without installation and uninstallation. It is understandable that the data channel application can exist in the form of a web page, or in the form of a mini program/quick application/light application, etc., and this application does not limit this.
- the data channel application involved in the embodiments of the present application may be a DC App in a 4G/5G network.
- the DC App can transmit various data such as text, pictures, locations, files, etc. before and after an IMS call is established, and realize communication between the two parties in addition to voice calls or video calls, which can greatly enhance the experience of both parties.
- the terminal device can obtain the DC App from the DCSF through the HTTP process via BDC, and can automatically or interactively update it at any time, and then communicate with the terminal device of the other end through the DC App except for voice calls or video calls.
- the first terminal device and the second terminal device are in the same IMS call service. Assuming that the first terminal device wants to share its mobile phone screen with the second terminal device during the call with the second terminal device to guide B to set up the mobile phone, the first terminal device and the second terminal device can first obtain the DC App for screen sharing respectively, and then run the DC App respectively to communicate with the UE of the other end except for voice calls or video calls.
- the description information involved in the embodiment of the present application refers to information related to the media resources used for IMS calls, such as IP address, port information, TLS ID, certificate, DC stream ID, etc. Therefore, the description information in the embodiment of the present application can also be called media information, media description information or media resource information.
- the two UEs conducting an IMS call can obtain the description information used to establish a data channel between UE 1 and UE 2 through description information negotiation.
- the description information negotiation here refers to UE 1 and UE 2 negotiating the media description information used by each other to conduct the IMS call, that is, UE 1 and UE 2 need to know the description information used by each other to send and receive media.
- Fig. 5 shows an exemplary process of creating a data channel through media negotiation provided by an embodiment of the present application. The process is exemplarily described below in conjunction with each step in Fig. 5 .
- S501 UE sends an initial invite request message to P-CSCF, the initial invite request message includes SDP offer#1 and DC capability indication information.
- the SDP offer#1 is the description information used by the UE to establish BDC, and the DC capability indication information is used to indicate that the UE supports DC capability.
- the P-CSCF sends an initial invite request message to the S-CSCF.
- S-CSCF sends an initial invite request message to MMTel AS.
- MMTel AS determines that UE supports DC and triggers the BDC creation process.
- MMTel AS sends a DC event notify message to DCSF to report the DC call event to DCSF.
- DCSF sends a DC control request (DC control request) message to apply for BDC channel resources.
- MMTel AS sends SDP offer#1 to DCMF to apply for BDC resources.
- DCMF sends SDP answer#1 and SDP offer#2 to MMTel AS, where SDP answer#1 is the description information determined by DCMF for creating BDC between UE and DCMF, and SDP offer#2 is the description information provided by DCMF for creating BDC between DCMF and the called side device.
- MMTel AS sends an initial invite request message to S-CSCF, and the initial invite request message includes SDP offer#2.
- S-CSCF sends an initial invite request message to the IMS on the called side, and the initial invite request message includes SDP offer#2.
- the called side IMS sends an 18X response message to the MMTel AS through the S-CSCF.
- the 18X response message includes SDP answer#2, which is the description information determined by the called side device for establishing the BDC between the DCMF and the called side device.
- MMTel AS sends SDP answer#2 to DCMF.
- MMTel AS sends an 18X response message to S-CSCF, and the 18X response message includes SDP answer#1.
- S544 S-CSCF and P-CSCF create DC QoS process.
- the P-CSCF sends an 18X response message to the UE.
- the UE and the DCMF negotiate the description information for establishing the BDC between the UE and the DCMF
- the DCMF and the called side device negotiate the description information for establishing the BDC between the DCMF and the called side device.
- the called IMS After the call between the UE and the called device is established, the called IMS sends a 200 OK response message to the UE through each network element, as shown in S516-S519, which will not be repeated here.
- the UE triggers the ADC creation process:
- the UE sends a re-invite request message to the P-CSCF, where the re-invite request message includes SDP offer#3.
- the SDP offer#3 is the description information used by the UE to establish the ADC, and the DC capability indication information is used to indicate that the UE supports the DC capability.
- the P-CSCF sends a re-invite request message to the S-CSCF.
- S-CSCF sends a re-invite request message to MMTel AS.
- MMTel AS determines that UE supports DC and triggers the ADC creation process.
- MMTel AS sends a DC event notify message to DCSF to report the DC call event to DCSF.
- DCSF sends a DC control request (DC control request) message to apply for ADC channel resources.
- MMTel AS sends SDP offer#3 to DCMF to apply for ADC resources.
- DCMF sends SDP answer#3 and SDP offer#4 to MMTel AS, where SDP answer#3 is the description information determined by DCMF for creating ADC between UE and DCMF, and SDP offer#4 is the description information provided by DCMF for creating ADC between DCMF and the called side device.
- MMTel AS sends a re-invite request message to S-CSCF, and the re-invite request message includes SDP offer#4.
- S-CSCF sends a re-invite request message to the IMS on the called side, and the re-invite request message includes SDP offer#4.
- the called side IMS sends a 200 response message to the MMTel AS through the S-CSCF.
- the 200 response message includes SDP answer#4, which is the description information determined by the called side device for establishing the ADC between the DCMF and the called side device.
- MMTel AS sends SDP answer#4 to DCMF.
- MMTel AS sends a 200 response message to S-CSCF, and the 200 response message includes SDP answer#3.
- S533, S-CSCF and P-CSCF create DC QoS process.
- the P-CSCF sends a 200 response message to the UE.
- the UE and the DCMF negotiate the description information for establishing the ADC between the UE and the DCMF
- the DCMF and the called side device negotiate the description information for establishing the ADC between the DCMF and the called side device.
- telecommunications networks are required to provide IMS emergency call services.
- a user dials an emergency call number, or uses the default emergency call number stored in the terminal device (such as 110, 119, 112, etc.), or uses an emergency call identifier (such as SOS) to initiate an IMS emergency call
- the network will connect the IMS emergency call to the local public safety answering center PSAP, such as a fire alarm call center, medical rescue and rescue center, etc.
- PSAP public safety answering center
- FIG6 shows a network architecture diagram of an IMS emergency call applicable to an embodiment of the present application.
- the E-CSCF/EATF is connected to the P-CSCF to select a suitable PSAP for the UE's IMS emergency call.
- the E-CSCF supports DC interaction of the IMS session, that is, the MMTel AS can establish a data channel for the terminal device.
- the E-CSCF can be called a session control function device, which is used to control the establishment process of the data channel.
- Fig. 7 shows an exemplary flow chart of an IMS emergency call provided by the embodiment of the present application applicable to the network shown in Fig. 6. The flow is exemplarily described below in conjunction with each step in Fig. 7.
- S701 UE sends an invite request message to P-CSCF to initiate an IMS emergency call request.
- the P-CSCF sends a 100Trying message to the UE.
- the 100Trying message is a temporary response message used to respond to the invite request message from the UE.
- P-CSCF triggers the IMS emergency call dedicated bearer establishment process.
- the specific process is not limited in this application.
- the P-CSCF sends an invite request message to the E-CSCF/EATF.
- E-CSCF/EATF returns a 100Trying message to P-CSCF.
- E-CSCF/EATF sends an invite request message to PSAP.
- the E-CSCF/EATF selects a suitable PSAP according to the current location of the user, and then sends the invite request message to the PSAP.
- PSAP sends a 100Trying message to E-CSCF/EATF.
- PSAP sends a 180 Ringing message to E-CSCF/EATF.
- the PSAP in response to the received invite request message, after ringing, the PSAP sends a 180Ringing message to the E-CSCF/EATF to indicate to the calling UE that the PSAP has started ringing.
- the E-CSCF/EATF sends a 180 Ringing message to the P-CSCF.
- the P-CSCF sends a 180Ringing message to the UE.
- PSAP sends a 200OK response message to E-CSCF/EATF.
- the 200OK response message is used to indicate that PSAP is ready Resources such as ports and encoding formats for audio and video calls with UE.
- E-CSCF/EATF sends a 200OK response message to P-CSCF.
- the P-CSCF sends a 200OK response message to the UE.
- the UE sends an ACK message to the P-CSCF.
- the ACK message is used to indicate that the UE has successfully received the 200OK response message from the PSAP.
- the P-CSCF sends an ACK message to the E-CSCF/EATF.
- E-CSCF/EATF sends an ACK message to PSAP.
- S717 An emergency call is made between the UE and the PSAP.
- the UE sends a BYE message to the P-CSCF.
- the BYE message is used to request to end the emergency call.
- P-CSCF sends a BYE message to PSAP.
- S720 The P-CSCF triggers the IMS emergency call dedicated bearer release process.
- PSAP sends a 200OK response message to P-CSCF.
- the P-CSCF sends a 200OK response message to the UE.
- the embodiments shown below do not particularly limit the specific structure of the execution subject of the method provided in the embodiments of the present application.
- the execution subject of the method provided in the embodiments of the present application can be a core network device and a terminal device, or a functional module in the core network device or the terminal device that can call and execute the program.
- the information enabled by the information is called information to be enabled.
- the information to be enabled can be directly enabled, such as the information to be enabled itself or the index of the information to be enabled.
- the information to be enabled can also be indirectly enabled by enabling other information, wherein there is an association relationship between the other information and the information to be enabled. It is also possible to enable only a part of the information to be enabled, while the other parts of the information to be enabled are known or agreed in advance.
- the enabling of specific information can also be achieved by means of the arrangement order of each piece of information agreed in advance (such as specified by the protocol), thereby reducing the enabling overhead to a certain extent.
- the common parts of each piece of information can also be identified and enabled uniformly to reduce the enabling overhead caused by enabling the same information separately.
- the first, second, and various numerical numbers (e.g., "#1", “#2”, etc.) shown in the present application are only for convenience of description and are used to distinguish objects, and are not used to limit the scope of the embodiments of the present application. For example, to distinguish different messages, etc., rather than to describe a specific order or sequence. It should be understood that the objects described in this way can be interchangeable where appropriate so as to be able to describe solutions other than the embodiments of the present application.
- pre-configuration may include pre-definition, such as protocol definition.
- pre-definition can be implemented by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in a device (for example, including each network element), and this application does not limit its specific implementation method.
- the "storage” involved in the embodiments of the present application may refer to storage in one or more memories.
- the one or more memories may be separately set or integrated in an encoder or decoder, a processor, or a communication device.
- the one or more memories may also be partially separately set and partially integrated in a decoder, a processor, or a communication device.
- the type of memory may be any form of storage medium, which is not limited by the present application.
- the "protocol” involved in the embodiments of the present application may refer to a standard protocol in the communication field, for example, it may include 4G/5G protocols, new radio (NR) protocols, and related protocols used in future communication systems, and the present application does not limit this.
- FIG8 shows an exemplary flow chart of a method 800 provided in an embodiment of the present application.
- the session control function device is a multimedia telephony application server, and the multimedia telephony application server controls the creation process of the data channel between the two side devices of the IMS session.
- the method 800 is exemplarily described below in conjunction with each step in FIG8.
- the second communication device sends a call response message to the first communication device; correspondingly, the first communication device receives the call response message from the second communication device.
- the second communication device sends a call response message to the first communication device through the session control network element, and the call response message is used to indicate that the IMS session between the first communication device and the second communication device is established. That is, after the first communication device receives the call response message from the second communication device, it can determine that the IMS session between the first communication device and the second communication device is established according to the call response message.
- the first communication device is a calling device
- the second communication device is a called device corresponding to the first communication device, that is, the first communication device and the second communication device are two devices in the same IMS session service.
- the first communication device initiates a call process to the second communication device to establish an IMS session between the first communication device and the second communication device.
- the first communication device sends an initial invite request message to the session control function device.
- the session control function device receives the initial invite request message from the first communication device.
- the first communication device sends an initial invite request message to the session control function device to request to establish an IMS session between the first communication device and the second communication device.
- the first communication device does not carry description information for establishing the first data channel and/or the second data channel in the initial invite request message.
- the IMS session in the embodiment of the present application can be an emergency call, that is, the first communication device requests to establish an emergency call with the second communication device through the initial invite request message, and the first communication device can carry an emergency call identifier and/or a called party ID (the called party ID is an emergency call number) in the initial invite request message.
- the second communication device can be a public safety answering point (such as a PSAP).
- the session control function device suppresses a trigger to establish a first data channel.
- the session control function device after receiving the initial invite request message from the first communication device, suppresses the triggering of establishing the first data channel.
- the session control function device suppresses the triggering of establishing the first data channel, which means that the session control function device prohibits the establishment process of the first data channel, or the session control function device does not trigger the establishment of the first data channel, or the session control function device does not report the call event to the data channel signaling function network element.
- the multimedia application server may suppress the trigger for establishing the first data channel in any IMS call establishment process, or may suppress the trigger for establishing the first data channel when it is determined that the initial invite request message does not carry descriptive information for creating the first data channel, and/or when it is determined that the current call is an IMS emergency call.
- the session control function device can reduce the delay of IMS session connection by suppressing the trigger to establish the first data channel in the IMS session establishment process, that is, it can avoid the situation where the delay of IMS session connection becomes longer due to the establishment of the first data channel, thereby improving communication efficiency.
- reducing the delay of IMS session connection can enable the user's alarm information to be processed as soon as possible, thereby effectively protecting the user's life and property safety.
- the session control function device forwards the initial invite request message to the second communication device to trigger an IMS session establishment process between the first communication device and the second communication device.
- the specific process is not limited in this application.
- the second communication device After the IMS session between the first communication device and the second communication device is established, the second communication device sends a call response message to the first communication device, that is, executes S810.
- the call response message is an off-hook 200OK response message
- the call response message is a response message to the initial invite request message of the first communication device.
- S820 The first communication device sends a re-invite request message to the session control function device.
- the session control function device receives the re-invite request message from the first communication device.
- the first communication device after the first communication device receives a call response message from the second communication device, in response to the call response message, the first communication device sends a re-invite request message to the session control function device. That is, the re-invite request message is sent to the session control function device after the IMS session between the first communication device and the second communication device is established.
- the session control function device is a multimedia telephone application server
- the re-invite request message includes first description information for establishing a first data channel, that is, the re-invite request message is used to trigger the establishment of the first data channel.
- the data channel is used to download a data channel application
- the data channel application is used to perform communications other than voice calls or video calls between the first communication device and the second communication device.
- the data channel application transmits additional communication information between the first communication device and the second communication device to perform communications other than voice calls or video calls between the first communication device.
- the first data channel includes a first guided data channel between the first communication device and the data channel media function network element, and a second guided data channel between the second data channel and the data channel media function network element.
- the first communication device can download the data channel application from the data channel media function network element through the first guided data channel
- the second communication device can download the data channel application from the data channel media function network element through the second guided data channel.
- the first communication device initiates the establishment process of the first data channel after the IMS session between the first communication device and the second communication device is established, so as to prevent the establishment process of the first data channel from increasing the delay of establishing the IMS session between the first communication device and the second communication device.
- the session control function device triggers establishment of a first data channel.
- the session control function device after receiving the re-invite request message from the first communication device, the session control function device triggers establishment of the first data channel according to the re-invite request message.
- the re-invite request message also includes second description information for requesting the establishment of a second data channel, and the second data channel is used to transmit additional communication information of the data channel application. Therefore, in this implementation, the first data channel and the second data channel can be established at the same time, without the need to establish the first data channel and the second data channel separately through two re-invite processes, thereby reducing the time for establishing the data channel and improving communication efficiency.
- the UE sends a re-invite request message to the session control function device, and the re-invite request message carries first description information of the first communication device for establishing the first data channel and second description information for establishing the second data channel.
- the first data channel includes a first pilot data channel between the first communication device and the data channel media function network element, and a second pilot data channel between the second communication device and the data channel media function network element
- the second data channel includes a first application data channel between the first communication device and the data channel media function network element, and a second application data channel between the second communication device and the data channel media function network element.
- the session control function device requests the data channel media function network element for third description information, fourth description information, fifth description information, and sixth description information; wherein the third description information is used for the data channel media function network element to establish the first pilot data channel, the fourth description information is used for the data channel media function network element to establish the first application data channel, the fifth description information is used for the data channel media function network element to establish the second pilot data channel, and the sixth description information is used for the data channel media function network element to establish the second application data channel. Further, the session control function device sends a request message to the second communication device, and the request message includes the fifth description information and the sixth description information.
- the second communication device After receiving the request message from the session control function device, the second communication device determines the seventh description information for establishing the second guided data channel and the eighth description information for establishing the second application data channel, and then sends a response message to the session control function device, and carries the seventh description information and the eighth description information in the response message; on the other hand, the data channel media function network element sends the third description information and the fourth description information to the first communication device, and sends the seventh description information and the eighth description information to the data channel media function network element.
- the first communication device and the data channel media function network element negotiate and determine the description information (i.e., the third description information) for establishing the first guided data channel, and the description information (i.e., the fourth description information) for establishing the first application data channel;
- the second communication device and the data channel media function network element negotiate and determine the description information (i.e., the seventh description information) for establishing the second guided data channel, and the description information (i.e., the eighth description information) for establishing the second application data channel.
- the first data channel includes a third pilot data channel between the first communication device and the data channel media function network element, and a fourth pilot data channel between the second communication device and the data channel media function network element, and the second data channel includes a third application data channel between the first communication device and the second communication device.
- the session control function device requests the data channel media function network element for the ninth description information and the tenth description information, wherein the ninth description information is used for the third pilot data channel of the data channel media function network element, and the tenth description information is used for the data channel media function network element to establish the fourth pilot data channel;
- the session control function device sends a request message to the second communication device, the request message includes the second description information and the tenth description information;
- the session control function device receives a response message from the second communication device, the response message includes the eleventh description information and the twelfth description information, the eleventh description information is used for the second communication device to establish the fourth pilot data channel, and the twelfth description information is used for the second communication device to establish the third application data channel.
- the session control function device sends the ninth description information and the twelfth description information to the first communication device, and sends the eleventh description information to the data channel media function network element.
- the first communication device and the data channel media function network element negotiate to determine the description information (i.e., the ninth description information) for establishing the third guided data channel;
- the second communication device and the data channel media function network element negotiate to determine the description information for establishing the fourth guided data channel. (ie, the eleventh description information);
- the first communication device and the second communication device negotiate and determine the description information (ie, the twelfth description information) used to establish the third application data channel.
- the first communication device may indicate whether the second data channel is anchored to the data channel media function network element.
- the second data channel needs to be anchored to the data channel media function network element, which refers to the second data channel between the first communication device and the second communication device, including the data channel between the first communication device and the data channel media function network element and the data channel media function network element and the second communication device.
- the first communication device cannot establish a second data channel directly to the second communication device.
- the second data channel does not need to be anchored to the data channel media function network element, which means that the first communication device can directly establish a second data channel to the second communication device without going through the data access media function network element.
- the first communication device implicitly indicates whether the second data channel is anchored to the data channel media function network element through the description information carried in the re-invite request message. For example, if the description information used by the first device to establish the first data channel is different from the description information used to establish the second data channel, it means that the second data channel is not anchored to the data channel media function network element; if the description information used by the first device to establish the first data channel is the same as the description information used to establish the second data channel, it means that the second data channel is anchored to the data channel media function network element; alternatively, the first communication device may also carry explicit indication information in the re-invite request message to indicate whether the second data channel is anchored to the data channel media function network element.
- the first communication device triggers the establishment of the second data channel after the first data channel is established. That is, the first communication device can establish the first data channel and the second data channel through two re-invite processes respectively, and the specific process is not limited in this application.
- the first data channel is also used to transmit additional communication information of the data channel application. That is, the first communication device requests to establish the first data channel through the re-invite process, and the first data channel can be used to download the data channel application and transmit additional communication information of the data channel application. Therefore, in this implementation, it is not necessary to establish a second data channel separately, thereby reducing the time to establish the data channel and improving communication efficiency.
- the establishment process of the first data channel is initiated only after the IMS session between the first communication device and the second communication device is established, thereby reducing the negative impact of the establishment of the first data channel on the call experience.
- the first aspect please refer to the first aspect and will not be repeated here.
- the above solution can be applied to the IMS emergency call scenario.
- the user's alarm information can be processed as quickly as possible, thereby effectively protecting the user's life and property safety.
- a data channel can be established in the emergency call scenario to provide communication services other than voice calls or video calls for both parties, thereby improving the user experience.
- FIG9 shows an exemplary flow chart of a method 900 provided in an embodiment of the present application.
- the session control function device is an emergency call session control function network element, and the function of the emergency call session control function network element is enhanced so that the emergency call session control function network element controls the creation process of the data channel between the devices on both sides of the emergency call.
- the method 900 is exemplarily described below in conjunction with the various steps in FIG9.
- the second communication device sends a call response message to the first communication device; correspondingly, the first communication device receives the call response message from the second communication device.
- the call response message is used to indicate that the IMS session established between the first communication device and the second communication device through the emergency call has been established. That is, after the first communication device receives the call response message from the second communication device, it can determine that the IMS session between the first communication device and the second communication device has been established according to the call response message.
- the first communication device is the calling device of the emergency call
- the second communication device is the called device of the emergency call (such as the second communication device is a public safety answering point), that is, the first communication device and the second communication device are two devices in the same emergency call service.
- the first communication device initiates an emergency call process to the second communication device, and in S911, an emergency call establishment process is executed between the first communication device and the second communication device.
- an emergency call establishment process is executed between the first communication device and the second communication device.
- the first communication device sends a re-invite request message to the session control function device.
- the session control function device receives the re-invite request message from the first communication device.
- the first communication device after the first communication device receives a call response message from the second communication device, in response to the call response message, the first communication device sends a re-invite request message to the session control function device, and the re-invite request message includes first description information for establishing a first data channel, and the first data channel is used to download a data channel application, and the data channel application is used to conduct communications other than voice calls or video calls between the first communication device and the second communication device.
- the first communication device initiates the process of establishing the first data channel after the IMS session between the first communication device and the second communication device is established, so as to prevent the process of establishing the first data channel from increasing the delay of call establishment.
- the session control function device triggers establishment of a first data channel.
- the multimedia telephony application server after receiving the re-invite request message from the first communication device, the multimedia telephony application server triggers the establishment of the first data channel according to the re-invite request message.
- the specific implementation process is similar to the solution introduced in S830 of method 800, and will not be repeated here for brevity.
- the establishment process of the first data channel is initiated only after the IMS session established by the IMS emergency call between the first communication device and the second communication device is established, thereby reducing the negative impact of the establishment of the data channel on the call experience, for example, the user's alarm information can be processed as quickly as possible, thereby effectively protecting the user's life and property safety.
- a data channel can be established in the emergency call scenario to provide communication services other than voice calls or video calls for both parties, thereby improving the user experience.
- FIG10 shows a network architecture diagram applicable to an embodiment of the present application.
- the UE can establish an emergency call with the PSAP through the DCMF, and the MMTel AS controls the process of establishing the data channel between the UE and the PSAP.
- Methods 1100-1500 shown in FIGS. 11 to 15 are applicable to the network architecture shown in FIG10, and methods 1100-1500 can correspond to the above-mentioned method 800, that is, methods 1100-1500 can be regarded as several possible implementations corresponding to method 800.
- the first communication device in method 800 may correspond to the UE in methods 1100-1500
- the second communication device in method 800 may correspond to the PSAP in methods 1100-1500
- the session control function device in method 800 may correspond to the MMTel AS in methods 1100-1500
- the first description information in method 800 may correspond to BDC SDP offer#1 in method 1100 or method 1200
- the second description information in method 800 may correspond to ADC SDP offer#1 in method 1100 or method 1200
- the first description information in method 800 may correspond to BDC offer#1 in methods 1300-1500.
- S1110-S1125 in method 1100 may correspond to the process of establishing the first data channel and the second data channel in method 800
- S1210-S1226 in method 1200 may correspond to the process of establishing the first data channel and the second data channel in method 800
- S1310-S1325 in method 1300 may correspond to the process of establishing the first data channel in method 800
- S1326-S1341 in method 1300 may correspond to the process of establishing the second data channel in method 800
- S1410-S1425 in method 1400 may correspond to the process of establishing the first data channel in method 800
- S1426-S1437 in method 1400 may correspond to the process of establishing the second data channel in method 800
- S1510-S1525 in method 1500 may correspond to the process of establishing the first data channel in method 800.
- FIG11 shows an exemplary flow chart of a method 1100 applicable to the network architecture shown in FIG10.
- the UE simultaneously initiates the BDC and ADC creation processes to reduce the delay of the emergency call connection.
- the ADC is anchored to the DCMF.
- the method 1100 is exemplarily described below in conjunction with the various steps in FIG11.
- UE sends an initial INVITE request message to P-CSCF.
- P-CSCF receives the initial INVITE request message from UE.
- the UE sends an initial INVITE request message to the P-CSCF to initiate an emergency call.
- the called number carried by the UE in the initial INVITE request message is an emergency call number, or the UE carries an emergency call identifier in the initial INVITE request message.
- the initial INVITE request message may also carry description information used by the UE to establish an audio or video call, so as to establish an audio or video call between the UE and the PSAP.
- the UE may also carry DC capability indication information in the initial INVITE request message to indicate that the UE supports DC.
- UE support for DC may mean that the UE supports establishing a data channel and obtaining the DC App through the data channel.
- the P-CSCF determines that the current call is an emergency call and the UE supports DC, and triggers the S-CSCF.
- the P-CSCF sends an initial INVITE request message to the S-CSCF.
- the P-CSCF determines that the current call is an emergency call and that the UE supports DC. For example, the P-CSCF determines that the current call is an emergency call based on the called number or the emergency call identifier carried in the initial INVITE request message, and determines that the UE supports DC based on the DC capability indication information carried in the initial INVITE request message. In this case, the P-CSCF triggers the S-CSCF, that is, the P-CSCF forwards the initial INVITE request message to the S-CSCF at S1103.
- the S-CSCF determines that the current call is an emergency call and the UE supports DC, and first triggers the MMTel AS and then triggers the E-CSCF.
- the S-CSCF determines that the current call is an emergency call and the UE supports DC.
- the specific method can refer to the solution executed by the above P-CSCF, which will not be repeated here. If it is determined that the current call is an emergency call and the UE supports DC, the S-CSCF first sends the INVITE message to the MMTel AS (see S1105 for details), and then sends the initial The INVITE request message is forwarded to the E-CSCF (see S1108 for details).
- S-CSCF sends the initial INVITE request message to MMTel AS.
- MMTel AS receives the initial INVITE request message from S-CSCF.
- the S-CSCF when it is determined that the current call is an emergency call and the UE supports DC, the S-CSCF sends an INVITE message to the MMTel AS.
- S1106, MMTel AS determines not to trigger the DC creation process.
- the MMTel AS determines that the UE supports DC, but the current call is an emergency call, or the initial INVITE request message does not carry descriptive information for establishing a DC, then the MMTel AS determines not to trigger the DC creation process, that is, the MMTel AS does not trigger a DC call event report.
- MMTel AS sends an initial INVITE request message to S-CSCF.
- S-CSCF receives the initial INVITE request message from MMTel.
- the MMTel AS determines not to trigger the DC creation process, the MMTel AS continues to forward the initial INVITE request message to the S-CSCF.
- the S-CSCF sends an initial INVITE request message to the E-CSCF.
- the E-CSCF receives the initial INVITE request message from the S-CSCF.
- the S-CSCF determines to trigger the E-CSCF at S1104, and the S-CSCF sends an initial INVITE request message to the E-CSCF.
- the E-CSCF after receiving the initial INVITE request message from the S-CSCF, the E-CSCF selects a PSAP for the UE according to the called number and the location information of the UE, and completes the number conversion and routing processing of the emergency call.
- the specific process is not limited in this application.
- S1109a An IMS session is established between the UE and the PSAP.
- an IMS session is established between the UE and the PSAP, that is, a call between the UE and the PSAP is connected.
- the PSAP sends an off-hook 200 OK response message to the UE.
- the UE receives the off-hook 200 OK response message from the PSAP.
- the PSAP After the PSAP goes off-hook, it enters into a call with the UE (i.e., the IMS session between the UE and the PSAP is established). The PSAP then sends an off-hook 200 OK response message to the UE to indicate that the IMS session between the PSAP and the UE is successfully established. At this point, the UE and the PSAP can conduct an audio and video call through the established IMS session.
- the UE requests to establish a BDC and an ADC.
- the following is an exemplary description of the process of establishing a BDC and an ADC in conjunction with S1110-S1125.
- the UE sends a re-invite request message to the P-CSCF.
- the P-CSCF receives the re-invite request message from the UE.
- the UE After the UE determines that the emergency call with the PSAP is connected, it sends a re-invite request message to the P-CSCF to request negotiation to establish the BDC and ADC.
- the re-invite request message includes BDC SDP offer#1 and ADC SDP offer#1.
- the BDC SDP offer#1 is the description information used by the UE to establish the BDC, such as the IP address, port information, TLS ID and certificate, QoS requirements, etc. used by the UE to connect to the BDC.
- the UE may also carry BDC SDP offer#1 and ADC SDP offer#1 in the initial INVITE request message of S1101. In this case, the UE may no longer carry BDC SDP offer#1 and ADC SDP offer#1 in the re-invite request message of S1110.
- BDC SDP offer#1 and ADC SDP offer#1 carried by the UE in the re-invite request message:
- the P-CSCF sends a re-invite request message to the S-CSCF.
- the S-CSCF receives the re-invite request message from the P-CSCF.
- the P-CSCF after receiving the re-invite request message from the UE, the P-CSCF forwards the re-INVITE request message to the S-CSCF according to the route of the initial INVITE request message.
- S-CSCF sends a re-invite request message to MMTel AS.
- MMTel AS receives the re-invite request message from S-CSCF.
- the S-CSCF after receiving the re-invite request message from the UE, the S-CSCF forwards the re-INVITE request message to the MMTel AS according to the routing of the initial INVITE request message.
- S1113, MMTel AS determines to trigger the DC creation process.
- the MMTel AS determines to trigger the DC creation process, i.e., trigger the DC call event report (see S1114 for details), if it finds that the re-invite request message carries DC description information (i.e., the BDC SDP offer#1 and ADC SDP offer#1 mentioned above) and determines that the UE supports DC (it can be determined that the UE supports DC in the initial INVITE process, or it can be determined that the UE supports DC based on the DC capability indication information carried in the re-invite request message).
- DC description information i.e., the BDC SDP offer#1 and ADC SDP offer#1 mentioned above
- MMTel AS sends a DC event notify message to DCSF.
- DCSF receives the DC event notify message from MMTel AS.
- the MMTel AS sends a DC activity notification message to the DCSF to report the DC call event of the emergency call to the DCSF.
- DCSF sends a DC control request message to MMTel AS.
- MMTel AS receives the DC control request message from DCMF.
- DCSF After DCSF receives the DC call event reported by MMTel AS, it determines that the current call is an emergency call and the ADC needs to be anchored to DCMF. Then, DCSF sends a DC control request message to MMTel AS to apply for BDC and ADC channel resources.
- MMTel AS sends a resource request message to DCMF.
- DCMF receives the resource request message from MMTel AS.
- MMTel AS after receiving the DC control request message from DCSF, MMTel AS applies to DCMF for BDC and ADC channel resources.
- MMTel AS sends a resource request message to DCMF, the resource request message including BDC SDP offer#1 and ADC SDP offer#1, and the resource request message is used to request DCMF to obtain description information for creating BDC and ADC.
- DCMF sends a resource response message to MMTel AS.
- MMTel AS receives the resource response message from DCMF.
- DCMF performs media negotiation based on BDC SDP offer#1 and ADC SDP offer#1, determines the description information for creating the BDC (denoted as BDC#1) and ADC (denoted as ADC#1) between the UE and DCMF, and allocates the description information for creating the BDC (denoted as BDC#2) and ADC (denoted as ADC#2) between the PSAP and DCMF.
- DCMF sends a resource response message to MMTel AS, and the resource response message includes BDC SDP answer#1, ADC SDP answer#1, BDC SDP offer#2, and ADC SDP offer#2.
- BDC SDP answer#1 is the user defined by DCMF through negotiation.
- the ADC SDP answer#1 is the description information for creating BDC#1 between the UE and DCMF
- the ADC SDP answer#1 is the description information for creating ADC#1 between the UE and DCMF determined by DCMF negotiation
- the BDC SDP offer#2 is the description information for creating BDC#2 between the PSAP and DCMF allocated by DCMF
- the ADC SDP offer#2 is the description information for creating ADC#2 between the PSAP and DCMF allocated by DCMF.
- MMTel AS sends a re-invite request message to S-CSCF.
- S-CSCF receives the re-invite request message from MMTel AS.
- MMTel AS after receiving the resource response message from DCMF, MMTel AS sends a re-invite request message to S-CSCF, and carries BDC SDP offer#2 and ADC SDP offer#2 in the re-invite request message to negotiate the description information of BDC#2 and ADC#2 between DCMF and PSAP.
- the S-CSCF sends a re-invite request message to the PSAP through the E-CSCF.
- the PSAP receives the re-invite request message from the S-CSCF through the E-CSCF.
- the S-CSCF after receiving the re-invite request message from the MMTel AS, the S-CSCF forwards the re-invite request message to the PSAP through the E-CSCF.
- the re-invite request message includes BDC SDP offer#2 and ADC SDP offer#2.
- the examples of BDC SDP offer#2 and ADC SDP offer#2 can refer to the examples of BDC SDP offer#1 and ADC SDP offer#1 introduced in S1110, which will not be repeated here.
- PSAP sends a 200 response message to MMTel AS through S-CSCF.
- MMTel AS receives the 200 response message from PSAP through S-CSCF.
- the PSAP after receiving the re-invite request message, the PSAP completes the media negotiation according to the description information carried in the re-invite request message, and then sends a 200 response message to the MMTel AS through the S-CSCF.
- the 200 response message carries BDC SDP answer#2 and ADC SDP answer#2, wherein the BDC SDP answer#2 is the description information of BDC#2 determined by the PSAP negotiation for establishing the connection between the PSAP and the DCMF, and the ADC SDP answer#2 is the description information of ADC#2 determined by the PSAP negotiation for establishing the connection between the PSAP and the DCMF.
- MMTel AS sends BDC SDP answer#2 and ADC SDP answer#2 to DCMF.
- DCMF receives BDC SDP answer#2 and ADC SDP answer#2 from MMTel AS.
- the MMTel AS After receiving the 200 response message from the PSAP, the MMTel AS obtains the BDC SDP answer#2 and the ADC SDP answer#2 from the 200 response message, and then sends the BDC SDP answer#2 and the ADC SDP answer#2 to the DCMF to complete the media negotiation of BDC#2 and ADC#2 between the PSAP and the DCMF.
- the MMTel AS sends a 200 response message to the S-CSCF.
- the S-CSCF receives the 200 response message from the MMTel AS.
- MMTel AS after receiving the resource response message from DCMF, MMTel AS obtains BDC SDP answer#1 and ADC SDP answer#1 from the resource response message, and then sends a 200 response message to S-CSCF, and carries the BDC SDP answer#1 and ADC SDP answer#1 in the 200 response message.
- the S-CSCF sends a 200 response message to the UE via the P-CSCF.
- the UE receives the 200 response message from the S-CSCF via the P-CSCF.
- the S-CSCF forwards the 200 response message to the UE through the P-CSCF.
- the UE obtains the BDC SDP answer#1 and ADC SDP answer#1 from the 200 response message, thereby completing the media negotiation of BDC#1 and ADC#1 between the UE and the DCMF.
- S1124, BDC#1 and ADC#1 are established between the DCMF and the UE.
- DCMF completes the establishment of BDC and ADC with the calling UE and PSAP respectively.
- the UE and the PSAP can obtain the DC App through the established BDC, and then the DC App on the UE and the DC App on the PSAP can transmit information through the established ADC.
- the following is an exemplary description in conjunction with S1126-S1131.
- DC App obtained from DCMF through BDC#1, and the specific process is not limited in this application.
- the DC App here can be, for example, an emergency call applet.
- PSAP obtains DC App from DCMF via BDC#2. It can be understood that the DC App obtained by PSAP should be the same as the DC App obtained by UE.
- the DC App on the UE sends data #1, such as pictures, videos, locations, and other data, to the DCMF through ADC #1.
- DCMF sends data #1 to DC App on PSAP through ADC #2.
- DCMF sends data #2 to DC App on UE through ADC #1.
- UE and PSAP can transmit pictures, videos, location and other data through the established ADC channel in the downloaded DC App.
- FIG. 12 shows an exemplary flow chart of another method 1200 applicable to the network architecture shown in FIG. 10 .
- the UE simultaneously initiates the BDC and ADC creation processes to reduce the delay of the emergency call connection.
- the ADC is not anchored to the DCMF.
- the method 1200 is exemplarily described below in conjunction with the various steps in FIG. 12 .
- the UE initiates an emergency call through the initial INVITE process and establishes an IMS session with the PSAP.
- the specific process can be referred to the description of S1101-S1109b in method 1100, and will not be repeated here for the sake of brevity.
- the UE requests to establish a BDC and an ADC.
- the following is an exemplary description of the creation process of the BDC and the ADC in conjunction with S1210-S1225.
- the UE sends a re-invite request message to the P-CSCF.
- the P-CSCF receives the re-invite request message from the UE.
- the UE sends a re-invite request message to the P-CSCF to request negotiation to establish the BDC and ADC.
- the re-invite request message includes BDC SDP offer#1 and ADC SDP offer#1.
- the BDC SDP offer#1 is the description information used by the UE to establish the BDC, such as the IP address, port information, TLS ID and certificate, QoS requirements, etc. used by the UE to connect to the BDC.
- the UE may also carry BDC SDP offer#1 and ADC SDP offer#1 in the initial INVITE request message of S1201. In this case, the UE may no longer carry BDC SDP offer#1 and ADC SDP offer#1 in the re-invite request message of S1210.
- BDC SDP offer#1 and ADC SDP offer#1 carried by the UE in the re-invite request message:
- P-CSCF sends a re-invite request message to S-CSCF, where the re-invite request message includes BDC SDP offer#1 and ADC SDP offer#1.
- S-CSCF receives the re-invite request message from P-CSCF.
- S-CSCF sends a re-invite request message to MMTel AS, where the re-invite request message includes BDC SDP offer#1 and ADC SDP offer#1.
- MMTel AS receives the re-invite request message from S-CSCF.
- S1213, MMTel AS determines to trigger the DC creation process.
- S1211-S1213 are similar to S1111-S113 in method 1100, except that the description information carried in the re-invite request message is different, which will not be described here for brevity.
- MMTel AS sends a DC event notify message to DCSF to report the DC call event of the emergency call to DCSF.
- DCSF receives the DC event notify message from MMTel AS.
- DCSF sends a DC control request message to DC.
- DC receives the DC control request message from DCMF.
- DCSF After DCSF receives the DC call event reported by MMTel AS, it determines that the current call is an emergency call and the ADC is not anchored to DCMF. Then, DCSF sends a DC control request message to MMTel AS to apply for BDC channel resources (no need to apply for ADC channel resources).
- MMTel AS sends a resource request message to DCMF.
- DCMF receives the resource request message from MMTel AS.
- the MMTel AS after receiving the DC control request message from the DCMF, applies to the DCMF for BDC channel resources. For example, the MMTel AS sends a resource request message to the DCMF, the resource request message including the BDC SDP offer#1, and the resource request message is used to request the DCMF to obtain the description information used to create the BDC.
- DCMF sends a resource response message to MMTel AS.
- MMTel AS receives the resource response message from DCMF.
- DCMF performs media negotiation based on BDC SDP offer#1, determines the description information for creating the BDC (denoted as BDC#1) between the UE and DCMF, and allocates the description information for creating the BDC (denoted as BDC#2) and ADC (denoted as ADC#2) between the PSAP and DCMF.
- DCMF sends a resource response message to MMTel AS, which includes BDC SDP answer#1 and BDC SDP offer#2.
- BDC SDP answer#1 is the description information of BDC#1 determined by DCMF negotiation for establishing BDC#1 between UE and DCMF;
- BDC SDP offer#2 is the description information of BDC#2 allocated by DCMF for establishing BDC#2 between PSAP and DCMF.
- MMTel AS sends a re-invite request message to S-CSCF.
- S-CSCF receives the re-invite request message from MMTel AS.
- the MMTel AS after receiving the resource response message from DCMF, the MMTel AS sends a re-invite request message to the S-CSCF, and carries ADC SDP offer#1 and BDC SDP offer#2 in the re-invite request message to negotiate the description information of ADC#1 between the UE and PSAP, and the description information of BDC#2 between the DCMF and PSAP.
- BDC SDP offer#2 and ADC SDP offer#1 carried by the MMTel AS in the re-invite request message:
- the S-CSCF sends a re-invite request message to the PSAP through the E-CSCF.
- the PSAP receives the re-invite request message from the S-CSCF through the E-CSCF.
- the S-CSCF after receiving the re-invite request message from the MMTel AS, the S-CSCF forwards the re-invite request message to the PSAP through the E-CSCF. It can be understood that the re-invite request message includes ADC SDP offer#1 and BDC SDP offer#2.
- PSAP sends a 200 response message to MMTel AS through S-CSCF.
- MMTel AS receives the 200 response message from PSAP through S-CSCF.
- the PSAP after receiving the re-invite request message, the PSAP completes the media negotiation according to the description information carried in the re-invite request message, and then sends a 200 response message to the MMTel AS through the S-CSCF.
- the 200 response message carries ADC SDP answer#1 and BDC SDP answer#2, wherein the ADC SDP answer#1 is the description information determined by the PSAP negotiation for establishing the ADC between the PSAP and the UE, and the BDC SDP answer#2 is the description information determined by the PSAP negotiation for establishing the BDC#2 between the PSAP and the DCMF.
- MMTel AS sends BDC SDP answer#2 to DCMF.
- DCMF receives BDC SDP answer#2 from MMTel AS.
- the MMTel AS after receiving the 200 response message from the PSAP, the MMTel AS obtains the BDC SDP answer#2 from the 200 response message, and then sends the BDC SDP answer#2 to the DCMF to complete the media negotiation of BDC#2 between the PSAP and the DCMF.
- the MMTel AS sends a 200 response message to the S-CSCF.
- the S-CSCF receives the 200 response message from the MMTel AS.
- MMTel AS after receiving the resource response message from DCMF and the 200 response message from PSAP, MMTel AS obtains BDC SDP answer#1 from the resource response message, obtains ADC SDP answer#1 from the 200 response message, and then sends a 200 response message to S-CSCF, and carries the BDC SDP answer#1 and ADC SDP answer#1 in the 200 response message.
- the S-CSCF sends a 200 response message to the UE via the P-CSCF.
- the UE receives the 200 response message from the S-CSCF via the P-CSCF.
- the S-CSCF forwards the 200 response message to the UE through the P-CSCF.
- the UE obtains BDC SDP answer#1 and ADC SDP answer#1 from the 200 response message, thereby completing the media negotiation of BDC#1 between the UE and the DCMF, and the media negotiation of ADC#1 between the UE and the PSAP.
- ADC#1 is established between the UE and the PSAP.
- DCMF completes the establishment of BDC with the calling UE and PSAP respectively.
- UE completes the establishment of ADC with PSAP.
- the UE and the PSAP can obtain the DC App through the established BDC, and then the DC App on the UE and the DC App on the PSAP can transmit information through the established ADC.
- the following is an exemplary description in conjunction with S1227-S1230.
- DC App obtained from DCMF through BDC#1.
- the specific process is not limited in this application.
- the DC App here can be, for example, an emergency call applet.
- PSAP obtains DC App from DCMF through BDC#2. It is understandable that the DC App obtained by PSAP should be the same as the DC App obtained by UE.
- the DC App on the UE sends data #1, such as pictures, videos, location and other data, to the DC App on the PSAP through ADC #1.
- the DC App on the PSAP sends data #2 to the DC App on the UE through ADC #1.
- UE and PSAP can transmit pictures, videos, location and other data through the established ADC channel in the downloaded DC App.
- FIG. 13 shows an exemplary flow chart of another method 1300 applicable to the network architecture shown in FIG. 10 .
- the UE initiates the establishment process of the BDC and the establishment process of the ADC respectively to reduce the connection delay of the emergency call.
- the ADC is anchored to the DCMF.
- the method 1300 is exemplarily described below in conjunction with the various steps in FIG. 13 .
- the UE initiates an emergency call through the initial INVITE process and establishes an IMS session with the PSAP.
- the specific process can be referred to the description of S1101-S1109b in method 1100, which will not be repeated here for brevity.
- the UE requests to establish a BDC.
- the creation process of the BDC is described below in conjunction with S1310-S1325.
- the UE sends a re-invite request message to the P-CSCF.
- the P-CSCF receives the re-invite request message from the UE.
- the UE sends a re-invite request message to the P-CSCF to request negotiation to establish a BDC.
- the re-invite request message includes BDC SDP offer#1.
- the BDC SDP offer#1 is the description information used by the UE to establish the BDC, such as the IP address, port information, TLS ID and certificate, QoS requirements, etc. used by the UE to connect to the BDC.
- the UE may also carry BDC SDP offer#1 in the initial INVITE request message of S1301. In this case, the UE may no longer carry BDC SDP offer#1 in the re-invite request message of S1310.
- BDC SDP offer#1 carried by the UE in the re-invite request message:
- the P-CSCF sends a re-invite request message to the S-CSCF.
- the S-CSCF receives the re-invite request message from the P-CSCF.
- the P-CSCF after receiving the re-invite request message from the UE, the P-CSCF forwards the re-INVITE request message to the S-CSCF according to the route of the initial INVITE request message.
- S-CSCF sends a re-invite request message to MMTel AS.
- MMTel AS receives the re-invite request message from S-CSCF.
- the S-CSCF after receiving the re-invite request message from the UE, the S-CSCF forwards the re-INVITE request message to the MMTel AS according to the routing of the initial INVITE request message.
- S1313, MMTel AS determines to trigger the BDC creation process.
- the MMTel AS determines to trigger the BDC creation process, i.e., trigger the DC call event report (see S1314 for details), if it finds that the re-invite request message carries the BDC description information (i.e., the above-mentioned BDC SDP offer#1) and determines that the UE supports DC (it can be determined that the UE supports DC in the initial INVITE process, or it can be determined that the UE supports DC based on the DC capability indication information carried in the re-invite request message).
- the BDC description information i.e., the above-mentioned BDC SDP offer#1
- MMTel AS sends a DC event notify message to DCSF.
- DCSF receives the DC event notify message from MMTel AS.
- the MMTel AS sends a DC activity notification message to the DCSF to report the DC call event of the emergency call to the DCSF.
- DCSF sends a DC control request message to DC.
- DC receives the DC control request message from DCSF.
- DCSF After DCSF receives the DC call event reported by MMTel AS and determines that the current call is an emergency call, DCSF sends a DC control request message to MMTel AS to apply for BDC channel resources.
- MMTel AS sends a resource request message to DCMF.
- DCMF receives the resource request message from MMTel AS.
- MMTel AS after receiving the DC control request message from DCSF, MMTel AS applies for BDC channel resources from DCMF.
- MMTel AS sends a resource request message to DCMF, the resource request message including BDC SDP offer#1, and the resource request message is used to request DCMF to obtain description information for creating BDC.
- DCMF sends a resource response message to MMTel AS.
- MMTel AS receives the resource response message from DCMF.
- DCMF performs media negotiation based on BDC SDP offer#1, determines the description information for creating the BDC between the UE and DCMF (denoted as BDC#1), and allocates the description information for creating the BDC between the PSAP and DCMF (denoted as BDC#2).
- DCMF sends a resource response message to MMTel AS, which includes BDC SDP answer#1 and BDC SDP offer#2.
- BDC SDP answer#1 is the description information of BDC#1 determined by DCMF negotiation for establishing BDC#1 between UE and DCMF;
- BDC SDP offer#2 is the description information of BDC#2 allocated by DCMF for establishing BDC#2 between PSAP and DCMF.
- the MMTel AS sends a re-invite request message to the S-CSCF.
- the S-CSCF receives the re-invite request message from the MMTel AS.
- MMTel AS after receiving the resource response message from DCMF, MMTel AS sends a re-invite request message to S-CSCF, and carries BDC SDP offer#2 in the re-invite request message to negotiate the description information of BDC#2 between DCMF and PSAP.
- the S-CSCF sends a re-invite request message to the PSAP through the E-CSCF.
- the PSAP receives the re-invite request message from the S-CSCF through the E-CSCF.
- the S-CSCF after receiving the re-invite request message from the MMTel AS, the S-CSCF forwards the re-invite request message to the PSAP through the E-CSCF.
- the re-invite request message includes BDC SDP offer#2.
- BDC SDP offer#2 and BDC SDP offer#1 can be referred to the example of BDC SDP offer#1 introduced in S1310, which will not be repeated here.
- PSAP sends a 200 response message to MMTel AS through S-CSCF.
- MMTel AS receives the 200 response message from PSAP through S-CSCF.
- the PSAP after receiving the re-invite request message, the PSAP completes the media negotiation according to the description information carried in the re-invite request message, and then sends a 200 response message to the MMTel AS through the S-CSCF.
- the 200 response message carries BDC SDP answer#2, wherein the BDC SDP answer#2 is the description information of BDC#2 determined by PSAP negotiation for establishing between the PSAP and DCMF.
- MMTel AS sends BDC SDP answer#2 to DCMF.
- DCMF receives BDC SDP answer#2 from MMTel AS.
- the MMTel AS after receiving the 200 response message from the PSAP, the MMTel AS obtains the BDC SDP answer#2 from the 200 response message, and then sends the BDC SDP answer#2 to the DCMF to complete the media negotiation of BDC#2 between the PSAP and the DCMF.
- the MMTel AS sends a 200 response message to the S-CSCF.
- the S-CSCF receives the 200 response message from the MMTel AS.
- MMTel AS after receiving the resource response message from DCMF, MMTel AS obtains BDC SDP answer#1 from the resource response message, and then sends a 200 response message to S-CSCF, and carries the BDC SDP answer#1 in the 200 response message.
- the S-CSCF sends a 200 response message to the UE via the P-CSCF.
- the UE receives the 200 response message from the S-CSCF via the P-CSCF.
- the S-CSCF forwards the 200 response message to the UE through the P-CSCF.
- the UE obtains the BDC SDP answer#1 from the 200 response message, thereby completing the media negotiation of BDC#1 between the UE and the DCMF.
- BDC#1 is established between DCMF and UE.
- DCMF completes the establishment of BDC with the calling UE and PSAP respectively.
- the UE requests to establish an ADC.
- the following is an exemplary description of the ADC creation process in conjunction with S1326-S1341.
- the UE sends a re-invite request message to the P-CSCF.
- the P-CSCF receives the re-invite request message from the UE.
- the UE sends a re-invite request message to the P-CSCF to request negotiation to establish an ADC.
- the re-invite request message includes ADC SDP offer#1.
- the ADC SDP offer#1 is the description information used by the UE to establish the ADC, such as the IP address, port information, TLS ID and certificate, QoS requirements, etc. used by the UE to connect to the ADC.
- a line a of ADC SDP offer#1 may be added to line m of BDC SDP offer#1.
- An example of ADC SDP offer#1 carried by the UE in a re-invite request message is given below:
- the P-CSCF sends a re-invite request message to the S-CSCF.
- the S-CSCF receives the re-invite request message from the P-CSCF.
- the P-CSCF after receiving the re-invite request message from the UE, the P-CSCF forwards the re-INVITE request message to the S-CSCF according to the route of the initial INVITE request message.
- S-CSCF sends a re-invite request message to MMTel AS.
- MMTel AS receives the re-invite request message from S-CSCF.
- the S-CSCF after receiving the re-invite request message from the UE, the S-CSCF forwards the re-INVITE request message to the MMTel AS according to the routing of the initial INVITE request message.
- S1329, MMTel AS determines to trigger the ADC creation process.
- the MMTel AS determines to trigger the ADC creation process, i.e., trigger the DC call event reporting, if it finds that the re-invite request message carries the ADC description information (i.e., the above-mentioned ADC SDP offer#1) and determines that the UE supports DC (it can be determined that the UE supports DC in the initial INVITE process, or it can be determined that the UE supports DC based on the DC capability indication information carried in the re-invite request message). (See S1330 for details)
- MMTel AS sends a DC event notify message to DCSF.
- DCSF receives the DC event notify message from MMTel AS.
- the MMTel AS sends a DC activity notification message to the DCMF to report the DC call event of the emergency call to the DCSF.
- DCSF sends a DC control request message to DC.
- DC receives the DC control request message from DCSF.
- DCSF After DCSF receives the DC call event reported by MMTel AS, it determines that the current call is an emergency call and the ADC needs to be anchored to DCMF. Then, DCSF sends a DC control request message to MMTel AS to apply for ADC channel resources.
- MMTel AS sends a resource request message to DCMF.
- DCMF receives the resource request message from MMTel AS.
- MMTel AS after receiving the DC control request message from DCSF, MMTel AS applies for ADC channel resources from DCMF.
- MMTel AS sends a resource request message to DCMF, the resource request message including ADC SDP offer#1, and the resource request message is used to request DCMF to obtain description information for creating ADC.
- DCMF sends a resource response message to MMTel AS.
- MMTel AS receives the resource response message from DCMF.
- the DCMF after receiving the resource request message from the MMTel AS, the DCMF performs media negotiation based on the ADC SDP offer#1, determines the description information for creating the ADC between the UE and the DCMF (denoted as ADC#1), and allocates the description information for creating the ADC between the PSAP and the DCMF (denoted as ADC#2).
- DCMF sends a resource response message to MMTel AS, which includes ADC SDP answer#1 and ADC SDP offer#2.
- ADC SDP answer#1 is the description information of ADC#1 determined by DCMF negotiation for establishing UE and DCMF;
- ADC SDP offer#2 is the description information of ADC#2 allocated by DCMF for establishing PSAP and DCMF.
- S1334 The MMTel AS sends a re-invite request message to the S-CSCF.
- the S-CSCF receives the re-invite request message from the MMTel AS.
- MMTel AS after receiving the resource response message from DCMF, MMTel AS sends a re-invite request message to S-CSCF, and carries ADC SDP offer#2 in the re-invite request message to negotiate the description information of ADC#2 between DCMF and PSAP.
- the S-CSCF sends a re-invite request message to the PSAP through the E-CSCF.
- the PSAP receives the re-invite request message from the S-CSCF through the E-CSCF.
- the S-CSCF after receiving the re-invite request message from the MMTel AS, the S-CSCF forwards the re-invite request message to the PSAP through the E-CSCF.
- the re-invite request message includes ADC SDP offer#2.
- ADC SDP offer#2 can refer to the example of ADC SDP offer#1 introduced in S1326, which will not be repeated here.
- PSAP sends a 200 response message to MMTel AS through S-CSCF.
- MMTel AS receives the 200 response message from PSAP through S-CSCF.
- the PSAP after receiving the re-invite request message, the PSAP completes the media negotiation according to the description information carried in the re-invite request message, and then sends a 200 response message to the MMTel AS through the S-CSCF.
- the 200 response message carries ADC SDP answer#2, wherein the ADC SDP answer#2 is the description information of ADC#2 determined by the PSAP negotiation for establishing the connection between the PSAP and the DCMF.
- MMTel AS sends ADC SDP answer#2 to DCMF.
- DCMF receives ADC SDP answer#2 from MMTel AS.
- the MMTel AS after receiving the 200 response message from the PSAP, the MMTel AS obtains ADC SDP answer#2 from the 200 response message, and then sends the ADC SDP answer#2 to the DCMF to complete the media negotiation of ADC#2 between the PSAP and the DCMF.
- MMTel AS sends a 200 response message to S-CSCF.
- S-CSCF receives the 200 response message from MMTel AS.
- the MMTel AS after receiving the resource response message from DCMF, the MMTel AS obtains ADC SDP answer#1 from the resource response message, and then sends a 200 response message to the S-CSCF, and carries the ADC SDP answer#1 in the 200 response message.
- the S-CSCF sends a 200 response message to the UE via the P-CSCF.
- the UE receives the 200 response message from the S-CSCF via the P-CSCF.
- the S-CSCF forwards the 200 response message to the UE through the P-CSCF.
- the UE obtains ADC SDP answer#1 from the 200 response message, thereby completing the media negotiation of ADC#1 between the UE and the DCMF.
- ADC#1 is established between the DCMF and the UE.
- ADC#2 is established between DCMF and PSAP.
- DCMF completes the establishment of ADC with the calling UE and PSAP respectively.
- the UE and the PSAP can obtain the DC App through the established BDC, and then the DC App on the UE and the DC App on the PSAP can transmit information through the established ADC, as shown in S1342-S1347.
- S1342-S1347 are similar to S1126-S1131 in method 1100, and will not be repeated here for the sake of brevity.
- FIG. 14 shows an exemplary flow chart of another method 1400 applicable to the network architecture shown in FIG. 10 .
- the UE initiates the establishment process of the BDC and the establishment process of the ADC respectively to reduce the connection delay of the emergency call.
- the ADC is anchored to the DCMF.
- the method 1400 is exemplarily described below in conjunction with the various steps in FIG. 14 .
- the UE initiates an emergency call through the initial INVITE process and establishes an IMS session with the PSAP.
- the specific process can be referred to the description of S1101-S1109b in method 1100, and will not be repeated here for the sake of brevity.
- S1410-S1425 are similar to S1310-S1325 in method 1300, and are not described here for brevity.
- the UE requests to establish an ADC.
- the following is an exemplary description of the ADC creation process in conjunction with S1426-S1437.
- the UE sends a re-invite request message to the P-CSCF.
- the P-CSCF receives the re-invite request message from the UE.
- the UE after determining that the emergency call between the UE and the PSAP is connected, the UE sends a re-invite request message to the P-CSCF to request negotiation to establish an ADC.
- the re-invite request message includes ADC SDP offer#1.
- the ADC SDP offer#1 is the description information used by the UE to establish the ADC, such as the IP address, port information, TLS ID and certificate, QoS requirements, etc. used by the UE to connect to the ADC.
- m lines of ADC SDP offer#1 may be added to m lines of BDC SDP offer#1.
- ADC SDP offer#1 carried by the UE in the re-invite request message:
- the P-CSCF sends a re-invite request message to the S-CSCF.
- the S-CSCF receives the re-invite request message from the P-CSCF.
- the P-CSCF after receiving the re-invite request message from the UE, the P-CSCF forwards the re-INVITE request message to the S-CSCF according to the route of the initial INVITE request message.
- S-CSCF sends a re-invite request message to MMTel AS.
- MMTel AS receives the re-invite request message from S-CSCF.
- the S-CSCF after receiving the re-invite request message from the UE, the S-CSCF forwards the re-INVITE request message to the MMTel AS according to the routing of the initial INVITE request message.
- S1429, MMTel AS determines to trigger the ADC creation process.
- the MMTel AS determines to trigger the ADC creation process, i.e., trigger the DC call event reporting (see S1430 for details), if it is found that the re-invite request message carries the ADC description information (i.e., the above-mentioned ADC SDP offer#1) and determines that the UE supports DC (it can be determined that the UE supports DC in the initial INVITE process or based on the DC capability indication information carried in the re-invite request message).
- the ADC description information i.e., the above-mentioned ADC SDP offer#1
- MMTel AS sends a DC event notify message to DCSF.
- DCSF receives a DC event notify message from This DC activity notification message from MMTel AS.
- the MMTel AS sends a DC activity notification message to the DCSF to report the DC call event of the emergency call to the DCSF.
- DCSF sends a DC control request message to DC.
- DC receives the DC control request message from DCMF.
- DCSF After DCSF receives the DC call event reported by MMTel AS, it determines that the current call is an emergency call and the ADC does not need to be anchored to DCMF. Then, DCSF sends a DC control request message to MMTel AS to instruct it to continue the call.
- MMTel AS sends a re-invite request message to S-CSCF.
- S-CSCF receives the re-invite request message from MMTel AS.
- the MMTel AS forwards the re-invite request message to the S-CSCF to negotiate the description information of ADC#1 between the UE and the PSAP.
- the S-CSCF sends a re-invite request message to the PSAP through the E-CSCF.
- the PSAP receives the re-invite request message from the S-CSCF through the E-CSCF.
- the S-CSCF after receiving the re-invite request message from the MMTel AS, the S-CSCF forwards the re-invite request message to the PSAP through the E-CSCF.
- PSAP sends a 200 response message to MMTel AS through S-CSCF.
- MMTel AS receives the 200 response message from PSAP through S-CSCF.
- the PSAP after receiving the re-invite request message, the PSAP completes the media negotiation according to the description information carried in the re-invite request message, and then sends a 200 response message to the MMTel AS through the S-CSCF.
- the 200 response message carries ADC SDP answer#1, wherein the ADC SDP answer#1 is the description information of ADC#1 determined by the PSAP negotiation for establishing the connection between the PSAP and the UE.
- MMTel AS sends a 200 response message to S-CSCF.
- S-CSCF receives the 200 response message from MMTel AS.
- the MMTel AS after receiving the 200 response message from the PSAP, forwards the 200 response message to the S-CSCF, and the 200 response message carries ADC SDP answer#1.
- the S-CSCF sends a 200 response message to the UE via the P-CSCF.
- the UE receives the 200 response message from the S-CSCF via the P-CSCF.
- the S-CSCF forwards the 200 response message to the UE through the P-CSCF.
- the UE obtains ADC SDP answer#1 from the 200 response message, thereby completing the media negotiation of ADC#1 between the UE and the PSAP.
- ADC#1 is established between PSAP and UE.
- the UE and the PSAP can obtain the DC App through the established BDC, and then the DC App on the UE and the DC App on the PSAP can transmit information through the established ADC, as shown in S1438-S1442.
- S1438-S1442 are similar to S1227-S1230 in method 1200, and are not described here for brevity.
- FIG. 15 shows an exemplary flow chart of another method 1500 of the network architecture shown in FIG. 10 .
- the establishment process of BDC is initiated to reduce the connection delay of the emergency call.
- BDC can be used to download data channel applications and can be used to transmit additional communication information of data channel applications. That is, ADC can not be established in this embodiment.
- the following is an exemplary description of method 1500 in conjunction with the various steps in FIG. 15 .
- the UE initiates an emergency call through the initial INVITE process and establishes an IMS session with the PSAP.
- the specific process can be referred to the description of S1101-S1109 in the method 1100, and will not be repeated here for the sake of brevity.
- S1510-S1525 are similar to S1310-S1325 in method 1300, and are not described here for brevity.
- DCMF completes the establishment of BDC with the calling UE and PSAP respectively.
- the UE and the PSAP can obtain the DC App through the established BDC, and then the DC App on the UE and the DC App on the PSAP can transmit information through the established BDC.
- the following is an exemplary description in conjunction with S1526-S1531.
- DC App obtained from DCMF via BDC#1, and the specific process is not limited in this application.
- the DC App here can be, for example, an emergency call applet.
- PSAP obtains DC App from DCMF through BDC#2. It is understandable that the DC App obtained by PSAP should be the same as the DC App obtained by UE.
- the DC App on the UE sends data #1, such as pictures, videos, location and other data, to DCMF through BDC #1.
- DCMF sends data #1 to DC App on PSAP through BDC #2.
- DCMF sends data #2 to DC App on UE through BDC #1.
- UE and PSAP can transmit pictures, videos, location and other data through the established ADC channel in the downloaded DC App.
- the above methods 1100-1500 are described by taking the scenario of emergency call as an example, but the present application is not limited to this. That is to say, the embodiments of the present application can also be applied to the scenarios of other IMS sessions other than emergency calls.
- the E-CSCF and PSAP in the above embodiments can be combined and regarded as the called device corresponding to the UE in the IMS session.
- the specific scheme can refer to the specific description in the above methods 1100-1500, which will not be repeated here.
- Figure 16 shows another network architecture diagram applicable to an embodiment of the present application.
- the UE can establish an emergency call with the PSAP through the DCMF, and the E-CSCF controls the establishment process of the data channel between the UE and the PSAP.
- the methods 1700-method 2100 shown in Figures 17 to 21 are applicable to the network architecture shown in Figure 16, and the methods 1700-method 2100 can correspond to the above-mentioned method 900, that is, the methods 1700-method 2100 can be regarded as several possible implementations corresponding to the method 800.
- the first communication device in the method 9800 may correspond to the UE in the method 1700-method 2100
- the second communication device in the method 800 may correspond to the PSAP in the method 1700-method 2100
- the session control function device in the method 900 may correspond to the E-CSCF in the method 1100-method 1500.
- the first description information in method 900 may correspond to BDC SDP offer#1 in method 1700 or method 1800
- the second description information in method 900 may correspond to ADC SDP offer#1 in method 1700 or method 1800
- the first description information in method 900 may correspond to BDC offer#1 in methods 1900-method 2100.
- S1702-S1715 in method 1700 may correspond to the process of establishing the first data channel and the second data channel in method 900
- S1802-S1816 in method 1800 may correspond to the process of establishing the first data channel and the second data channel in method 900
- S1902-S1915 in method 1900 may correspond to the process of establishing the first data channel in method 900
- S1916-S1929 in method 1900 may correspond to the process of establishing the second data channel in method 900
- S2002-S2015 in method 2000 may correspond to the process of establishing the first data channel in method 900
- S2016-S2025 in method 2000 may correspond to the process of establishing the second data channel in method 900
- S2102-S2115 in method 2100 may correspond to the process of establishing the first data channel in method 800.
- FIG. 17 shows an exemplary flow chart applicable to the network architecture 1700 shown in FIG. 16 .
- the UE simultaneously initiates the BDC and ADC creation processes to reduce the delay of the emergency call connection.
- the ADC is anchored to the DCMF.
- the method 1700 is exemplarily described below in conjunction with the various steps in FIG. 17 .
- the UE initiates an emergency call through an initial INVITE process and establishes an IMS session with the PSAP.
- an emergency call between the UE and the PSAP can be established by the method 700 shown in FIG.
- the UE requests to establish a BDC and an ADC.
- the following is an exemplary description of the creation process of the BDC and the ADC in conjunction with S1702-S1715.
- PSAP sends an off-hook 200OK response message to UE.
- UE receives the off-hook 200OK response message from PSAP.
- the UE sends a re-invite request message to the P-CSCF.
- the P-CSCF receives the re-invite request message from the UE.
- the UE After the UE determines that the emergency call with the PSAP is connected, it sends a re-invite request message to the P-CSCF to request negotiation to establish the BDC and ADC.
- the re-invite request message includes BDC SDP offer#1 and ADC SDP offer#1.
- the BDC SDP offer#1 is the description information used by the UE to establish the BDC, such as the IP address, port information, TLS ID and certificate, QoS requirements, etc. used by the UE to connect to the BDC.
- BDC SDP offer#1 and ADC SDP offer#1 please refer to the examples in S1110 of method 1100, which will not be repeated here.
- the P-CSCF sends a re-invite request message to the E-CSCF.
- the E-CSCF receives the re-invite request message from the P-CSCF.
- the P-CSCF after receiving the re-INVITE request message from the UE, the P-CSCF forwards the re-INVITE request message to the E-CSCF.
- E-CSCF determines to trigger the DC creation process.
- the E-CSCF After receiving the re-invite request message from the S-CSCF, the E-CSCF finds that the re-invite request message carries Based on the DC description information (i.e., the above-mentioned BDC SDP offer#1 and ADC SDP offer#1), and determining that the UE supports DC (it can be that the UE supports DC during the initial INVITE process, or it can be that the UE supports DC based on the DC capability indication information carried in the re-invite request message), it is determined to trigger the DC creation process, i.e., trigger the DC call event report (see S1705 for details).
- the DC creation process i.e., trigger the DC call event report (see S1705 for details).
- E-CSCF sends a DC event notify message to DCSF.
- DCSF receives the DC event notify message from E-CSCF.
- the E-CSCF sends a DC activity notification message to the DCMF to report a DC call event of the emergency call to the DCSF.
- DCSF sends a DC control request message to DC.
- DC receives the DC control request message from DCMF.
- the DCSF determines that the current call is an emergency call and the ADC needs to be anchored to the DCMF, then the DCSF sends a DC control request message to the E-CSCF to apply for BDC and ADC channel resources.
- the E-CSCF sends a resource request message to the DCMF.
- the DCMF receives the resource request message from the E-CSCF.
- E-CSCF after receiving the DC control request message from DCSF, E-CSCF applies to DCMF for BDC and ADC channel resources.
- E-CSCF sends a resource request message to DCMF, the resource request message including BDC SDP offer#1 and ADC SDP offer#1, and the resource request message is used to request DCMF to obtain description information for creating BDC and ADC.
- DCMF sends a resource response message to E-CSCF.
- E-CSCF receives the resource response message from DCMF.
- the DCMF after receiving the resource request message from the E-CSCF, performs media negotiation based on the BDC SDP offer#1 and the ADC SDP offer#1, determines the description information for creating the BDC (denoted as BDC#1) and the ADC (denoted as ADC#1) between the UE and the DCMF, and allocates the description information for creating the BDC (denoted as BDC#2) and the ADC (denoted as ADC#2) between the PSAP and the DCMF.
- DCMF sends a resource response message to E-CSCF, and the resource response message includes BDC SDP answer#1, ADC SDP answer#1, BDC SDP offer#2 and ADC SDP offer#2.
- BDC SDP answer#1 is the description information of BDC#1 determined by DCMF negotiation for creating UE and DCMF
- ADC SDP answer#1 is the description information of ADC#1 determined by DCMF negotiation for creating UE and DCMF
- BDC SDP offer#2 is the description information of BDC#2 allocated by DCMF for creating PSAP and DCMF
- ADC SDP offer#2 is the description information of ADC#2 allocated by DCMF for creating PSAP and DCMF.
- the E-CSCF sends a re-invite request message to the PSAP.
- the PSAP receives the re-invite request message from the E-CSCF.
- E-CSCF after receiving the resource response message from DCMF, E-CSCF sends a re-invite request message to PSAP, and carries BDC SDP offer#2 and ADC SDP offer#2 in the re-invite request message to negotiate the description information of BDC#2 and ADC#2 between DCMF and PSAP.
- PSAP sends a 200 response message to MMTel AS.
- E-CSCF receives the 200 response message from PSAP.
- the PSAP after receiving the re-invite request message, completes the media negotiation according to the description information carried in the re-invite request message, and then sends a 200 response message to the E-CSCF, wherein the 200 response message carries BDC SDP answer#2 and ADC SDP answer#2, wherein the BDC SDP answer#2 is the description information of BDC#2 determined by the PSAP through negotiation for establishing the connection between the PSAP and the DCMF, and the ADC SDP answer#2 is the description information of ADC#2 determined by the PSAP through negotiation for establishing the connection between the PSAP and the DCMF.
- E-CSCF sends BDC SDP answer#2 and ADC SDP answer#2 to DCMF.
- DCMF receives BDC SDP answer#2 and ADC SDP answer#2 from E-CSCF.
- the E-CSCF after receiving the 200 response message from the PSAP, the E-CSCF obtains the BDC SDP answer#2 and the ADC SDP answer#2 from the 200 response message, and then sends the BDC SDP answer#2 and the ADC SDP answer#2 to the DCMF to complete the media negotiation of BDC#2 and ADC#2 between the PSAP and the DCMF.
- the E-CSCF sends a 200 response message to the P-CSCF.
- the P-CSCF receives the 200 response message from the E-CSCF.
- E-CSCF after receiving the resource response message from DCMF, E-CSCF obtains BDC SDP answer#1 and ADC SDP answer#1 from the resource response message, and then sends a 200 response message to P-CSCF, and carries the BDC SDP answer#1 and ADC SDP answer#1 in the 200 response message.
- the P-CSCF sends a 200 response message to the UE.
- the UE receives the 200 response message from the P-CSCF.
- the P-CSCF forwards the 200 response message to the UE.
- the UE obtains BDC SDP answer#1 and ADC SDP answer#1 from the 200 response message, thereby completing the media negotiation of BDC#1 and ADC#1 between the UE and the DCMF.
- DCMF completes the establishment of BDC and ADC with the calling UE and PSAP respectively.
- the UE and PSAP can obtain the DC App through the established BDC, and then the DC App on the UE and the DC App on the PSAP can transmit information through the established ADC.
- the following is an exemplary explanation in combination with S1716-S1721.
- DC App obtained from DCMF through BDC#1.
- the specific process is not limited in this application.
- the DC App here can be, for example, an emergency call applet.
- PSAP obtains DC App from DCMF through BDC#2. It is understandable that the DC App obtained by PSAP should be the same as the DC App obtained by UE.
- the DC App on the UE sends data #1, such as pictures, videos, locations, and other data, to the DCMF through ADC #1.
- DCMF sends data #1 to DC App on PSAP through ADC #2.
- DC App on PSAP sends data #2 to DCMF via ADC #2.
- DCMF sends data #2 to DC App on UE through ADC #1.
- UE and PSAP can transmit pictures, videos, location and other data through the established ADC channel in the downloaded DC App.
- FIG. 18 shows an exemplary flow chart of another method 1800 applicable to the network architecture shown in FIG. 16 .
- method 1800 after the emergency call between the UE and the PSAP is established, the UE simultaneously initiates the BDC and ADC creation processes to reduce the delay of the emergency call connection.
- the ADC is not anchored to the DCMF.
- the method 1800 is exemplarily described below in conjunction with the various steps in FIG. 18 .
- the UE initiates an emergency call through an initial INVITE process and establishes an IMS session with the PSAP.
- PSAP sends an off-hook 200OK response message to UE.
- UE receives the off-hook 200OK response message from PSAP.
- an emergency call between the UE and the PSAP can be established by the method 700 shown in FIG.
- the UE requests to establish a BDC and an ADC.
- the following is an exemplary description of the creation process of the BDC and the ADC in conjunction with S1802-S1815.
- the UE sends a re-invite request message to the P-CSCF.
- the P-CSCF receives the re-invite request message from the UE.
- the UE After the UE determines that the emergency call with the PSAP is connected, it sends a re-invite request message to the P-CSCF to request negotiation to establish the BDC and ADC.
- the re-invite request message includes BDC SDP offer#1 and ADC SDP offer#1.
- the BDC SDP offer#1 is the description information used by the UE to establish the BDC, such as the IP address, port information, TLS ID and certificate, QoS requirements, etc. used by the UE to connect to the BDC.
- BDC SDP offer#1 and ADC SDP offer#1 please refer to the examples in S1210 of method 1200, which will not be repeated here.
- P-CSCF sends a re-invite request message to E-CSCF, where the re-invite request message includes BDC SDP offer#1 and ADC SDP offer#1.
- E-CSCF receives the re-invite request message from P-CSCF.
- S1804, MMTel AS determines to trigger the DC creation process.
- S1803-S1804 are similar to S703-S1704 in method 1700, except that the description information carried in the re-invite request message is different, which will not be described here for brevity.
- E-CSCF sends a DC event notify message to DCSF to report the DC call event of the emergency call to DCSF.
- DCMF receives the DC event notify message from E-CSCF.
- DCSF sends a DC control request message to DC.
- DC receives the DC control request message from DCSF.
- DCSF determines that the current call is an emergency call and the ADC is not anchored to DCMF, then DCSF sends a DC control request message to E-CSCF to apply for BDC channel resources (no need to apply for ADC channel resources).
- the E-CSCF sends a resource request message to the DCMF.
- the DCMF receives the resource request message from the E-CSCF.
- E-CSCF after receiving the DC control request message from DCSF, E-CSCF applies for BDC channel resources from DCMF.
- E-CSCF sends a resource request message to DCMF, the resource request message including BDC SDP offer#1, and the resource request message is used to request DCMF to obtain description information for creating BDC.
- DCMF sends a resource response message to E-CSCF.
- E-CSCF receives the resource response message from DCMF.
- the DCMF after receiving the resource request message from the E-CSCF, the DCMF performs media negotiation based on the BDC SDP offer#1, determines the description information for creating the BDC (denoted as BDC#1) between the UE and the DCMF, and allocates the description information for creating the BDC (denoted as BDC#2) and ADC (denoted as ADC#2) between the PSAP and the DCMF.
- DCMF sends a resource response message to E-CSCF, and the resource response message includes BDC SDP answer#1 and BDC SDP offer#2.
- BDC SDP answer#1 is the description information of BDC#1 determined by DCMF negotiation for establishing BDC#1 between UE and DCMF;
- BDC SDP offer#2 is the description information of BDC#2 allocated by DCMF for establishing BDC#2 between PSAP and DCMF.
- the E-CSCF sends a re-invite request message to the PSAP.
- the PSAP receives the re-invite request message from the E-CSCF.
- E-CSCF after receiving the resource response message from DCMF, E-CSCF sends a re-invite request message to PSAP, and carries ADC SDP offer#1 and BDC SDP offer#2 in the re-invite request message to negotiate the description information of ADC#1 between UE and PSAP, and the description information of BDC#2 between DCMF and PSAP.
- BDC SDP offer#2 and ADC SDP offer#1 please refer to the example in part S1218 of method 1200.
- the PSAP sends a 200 response message to the E-CSCF.
- the E-CSCF receives the 200 response message from the PSAP.
- the PSAP after receiving the re-invite request message, the PSAP completes the media negotiation according to the description information carried in the re-invite request message, and then sends a 200 response message to the E-CSCF.
- the 200 response message carries ADC SDP answer#1 and BDC SDP answer#2, wherein the ADC SDP answer#1 is the description information determined by the PSAP negotiation for establishing the ADC between the PSAP and the UE, and the BDC SDP answer#2 is the description information determined by the PSAP negotiation for establishing the BDC#2 between the PSAP and the DCMF.
- E-CSCF sends BDC SDP answer#2 to DCMF.
- DCMF receives BDC SDP answer#2 from E-CSCF.
- the E-CSCF after receiving the 200 response message from the PSAP, the E-CSCF obtains the BDC SDP answer#2 from the 200 response message, and then sends the BDC SDP answer#2 to the DCMF to complete the media negotiation of BDC#2 between the PSAP and the DCMF.
- the E-CSCF sends a 200 response message to the P-CSCF.
- the P-CSCF receives the 200 response message from the E-CSCF.
- E-CSCF after receiving the resource response message from DCMF and the 200 response message from PSAP, E-CSCF obtains BDC SDP answer#1 from the resource response message, obtains ADC SDP answer#1 from the 200 response message, and then sends a 200 response message to P-CSCF, and carries the BDC SDP answer#1 and ADC SDP answer#1 in the 200 response message.
- the P-CSCF sends a 200 response message to the UE.
- the UE receives the 200 response message from the P-CSCF.
- the P-CSCF forwards the 200 response message to the UE.
- the UE obtains BDC SDP answer#1 and ADC SDP answer#1 from the 200 response message, thereby completing the media negotiation of BDC#1 between the UE and the DCMF, and the media negotiation of ADC#1 between the UE and the PSAP.
- BDC#2 is established between DCMF and PSAP.
- ADC#1 is established between the UE and the PSAP.
- DCMF completes the establishment of BDC with the calling UE and PSAP respectively.
- UE completes the establishment of ADC with PSAP.
- the UE and the PSAP can obtain the DC App through the established BDC, and then the DC App on the UE and the DC App on the PSAP can transmit information through the established ADC.
- the following is an exemplary description in conjunction with S1817-S1820.
- DC App obtained from DCMF through BDC#1.
- the specific process is not limited in this application.
- the DC App here can be, for example, an emergency call applet.
- PSAP obtains DC App from DCMF through BDC#2. It is understandable that the DC App obtained by PSAP should be the same as the DC App obtained by UE.
- the DC App on the UE sends data #1, such as pictures, videos, locations, etc., to the DC App on the PSAP via ADC #1. according to.
- the DC App on the PSAP sends data #2 to the DC App on the UE through ADC #1.
- UE and PSAP can transmit pictures, videos, location and other data through the established ADC channel in the downloaded DC App.
- FIG. 19 shows an exemplary flow chart of another method 1900 applicable to the network architecture shown in FIG. 16 .
- the UE initiates the establishment process of the BDC and the establishment process of the ADC respectively to reduce the connection delay of the emergency call.
- the ADC is anchored to the DCMF.
- the method 1900 is exemplarily described below in conjunction with the various steps in FIG. 19 .
- the UE initiates an emergency call through an initial INVITE process and establishes an IMS session with the PSAP.
- PSAP sends an off-hook 200OK response message to UE.
- UE receives the off-hook 200OK response message from PSAP.
- an emergency call between the UE and the PSAP can be established by the method 700 shown in FIG.
- the UE requests to establish a BDC.
- the creation process of the BDC is described below in conjunction with S1902-S1915.
- the UE sends a re-invite request message to the P-CSCF.
- the P-CSCF receives the re-invite request message from the UE.
- the UE sends a re-invite request message to the P-CSCF to request negotiation to establish a BDC.
- the re-invite request message includes BDC SDP offer#1.
- the BDC SDP offer#1 is the description information used by the UE to establish the BDC, such as the IP address, port information, TLS ID and certificate, QoS requirements, etc. used by the UE to connect to the BDC.
- BDC SDP offer#1 and ADC SDP offer#1 please refer to the examples in S1310 of method 1300, which will not be repeated here.
- the P-CSCF sends a re-invite request message to the E-CSCF.
- the E-CSCF receives the re-invite request message from the P-CSCF.
- the P-CSCF after receiving the re-INVITE request message from the UE, the P-CSCF forwards the re-INVITE request message to the E-CSCF.
- the E-CSCF determines to trigger a BDC creation process.
- the E-CSCF after receiving the re-invite request message from the P-CSCF, if the E-CSCF finds that the re-invite request message carries BDC description information (i.e., the above-mentioned BDC SDP offer#1) and determines that the UE supports DC, it determines to trigger the BDC creation process, that is, trigger the DC call event report (see S1905 for details).
- BDC description information i.e., the above-mentioned BDC SDP offer#1
- E-CSCF sends a DC event notify message to DCSF.
- DCSF receives the DC event notify message from E-CSCF.
- the E-CSCF sends a DC activity notification message to the DCSF to report a DC call event of the emergency call to the DCSF.
- DCSF sends a DC control request message to E-CSCF.
- E-CSCF receives the DC control request message from DCSF.
- the DCSF determines that the current call is an emergency call, and then sends a DC control request message to the E-CSCF to apply for BDC channel resources.
- the E-CSCF sends a resource request message to the DCMF.
- the DCMF receives the resource request message from the E-CSCF.
- E-CSCF after receiving the DC control request message from DCSF, E-CSCF applies for BDC channel resources from DCMF.
- E-CSCF sends a resource request message to DCMF, the resource request message including BDC SDP offer#1, and the resource request message is used to request DCMF to obtain description information for creating BDC.
- DCMF sends a resource response message to E-CSCF.
- E-CSCF receives the resource response message from DCMF.
- the DCMF after receiving the resource request message from the E-CSCF, the DCMF performs media negotiation based on the BDC SDP offer#1, determines the description information for creating the BDC between the UE and the DCMF (denoted as BDC#1), and allocates the description information for creating the BDC between the PSAP and the DCMF (denoted as BDC#2).
- DCMF sends a resource response message to E-CSCF, and the resource response message includes BDC SDP answer#1 and BDC SDP offer#2.
- BDC SDP answer#1 is the description information of BDC#1 determined by DCMF negotiation for establishing BDC#1 between UE and DCMF;
- BDC SDP offer#2 is the description information of BDC#2 allocated by DCMF for establishing BDC#2 between PSAP and DCMF.
- the E-CSCF sends a re-invite request message to the PSAP.
- the PSAP receives the re-invite request message from the E-CSCF.
- E-CSCF after receiving the resource response message from DCMF, E-CSCF sends a re-invite request message to PSAP and The re-invite request message carries BDC SDP offer#2 to negotiate the description information of BDC#2 between DCMF and PSAP.
- PSAP sends a 200 response message to E-CSCF.
- E-CSCF receives the 200 response message from PSAP.
- the PSAP after receiving the re-invite request message, the PSAP completes the media negotiation according to the description information carried in the re-invite request message, and then sends a 200 response message to the E-CSCF.
- the 200 response message carries BDC SDP answer#2, wherein the BDC SDP answer#2 is the description information of BDC#2 determined by PSAP negotiation for establishing between the PSAP and DCMF.
- E-CSCF sends BDC SDP answer#2 to DCMF.
- DCMF receives BDC SDP answer#2 from E-CSCF.
- the E-CSCF after receiving the 200 response message from the PSAP, the E-CSCF obtains the BDC SDP answer#2 from the 200 response message, and then sends the BDC SDP answer#2 to the DCMF to complete the media negotiation of BDC#2 between the PSAP and the DCMF.
- the E-CSCF sends a 200 response message to the P-CSCF.
- the P-CSCF receives the 200 response message from the E-CSCF.
- E-CSCF after receiving the resource response message from DCMF, E-CSCF obtains BDC SDP answer#1 from the resource response message, and then sends a 200 response message to S-CSCF, and carries the BDC SDP answer#1 in the 200 response message.
- the P-CSCF sends a 200 response message to the UE.
- the UE receives the 200 response message from the P-CSCF.
- the P-CSCF forwards the 200 response message to the UE.
- the UE obtains the BDC SDP answer#1 from the 200 response message, thereby completing the media negotiation of BDC#1 between the UE and the DCMF.
- BDC#1 is established between DCMF and UE.
- BDC#2 is established between DCMF and PSAP.
- DCMF completes the establishment of BDC with the calling UE and PSAP respectively.
- the UE requests to establish an ADC.
- the following is an exemplary description of the ADC creation process in conjunction with S1916-S1929.
- the UE sends a re-invite request message to the P-CSCF.
- the P-CSCF receives the re-invite request message from the UE.
- the UE sends a re-invite request message to the P-CSCF to request negotiation to establish an ADC.
- the re-invite request message includes ADC SDP offer#1.
- the ADC SDP offer#1 is the description information used by the UE to establish the ADC, such as the IP address, port information, TLS ID and certificate, QoS requirements, etc. used by the UE to connect to the ADC.
- BDC SDP offer#1 and ADC SDP offer#1 please refer to the examples in S1326 of method 1300, which will not be repeated here.
- the P-CSCF sends a re-invite request message to the E-CSCF.
- the E-CSCF receives the re-invite request message from the P-CSCF.
- the P-CSCF after receiving the re-INVITE request message from the UE, the P-CSCF forwards the re-INVITE request message to the E-CSCF.
- the E-CSCF determines to trigger an ADC creation process.
- the E-CSCF after receiving the re-invite request message from the P-CSCF, if the E-CSCF finds that the re-invite request message carries ADC description information (i.e., the above-mentioned ADC SDP offer#1) and determines that the UE supports DC, it determines to trigger the ADC creation process, that is, trigger the DC call event report (see S1919 for details).
- ADC description information i.e., the above-mentioned ADC SDP offer#1
- E-CSCF sends a DC event notify message to DCSF.
- DCSF receives the DC event notify message from E-CSCF.
- the E-CSCF sends a DC activity notification message to the DCSF to report a DC call event of the emergency call to the DCSF.
- DCSF sends a DC control request message to E-CSCF.
- E-CSCF receives the DC control request message from DCMF.
- the DCMF determines that the current call is an emergency call and the ADC needs to be anchored to the DCMF, then the DCMF sends a DC control request message to the E-CSCF to apply for ADC channel resources.
- the E-CSCF sends a resource request message to the DCMF.
- the DCMF receives the resource request message from the E-CSCF.
- the E-CSCF after receiving the DC control request message from the DCMF, applies for ADC channel resources from the DCMF.
- the E-CSCF sends a resource request message to the DCMF, the resource request message including ADC SDP offer#1, and the resource request message is used to request the DCMF to obtain the description information used to create the ADC.
- DCMF sends a resource response message to E-CSCF.
- E-CSCF receives the resource response message from DCMF.
- the DCMF after receiving the resource request message from the E-CSCF, the DCMF performs media negotiation based on the ADC SDP offer#1, determines the description information for establishing the ADC (denoted as ADC#1) between the UE and the DCMF, and allocates the description information for establishing the PSAP and the DCMF. Description information of the ADC (denoted as ADC#2) in the space.
- DCMF sends a resource response message to E-CSCF, which includes ADC SDP answer#1 and ADC SDP offer#2.
- ADC SDP answer#1 is the description information of ADC#1 determined by DCMF negotiation for establishing UE and DCMF;
- ADC SDP offer#2 is the description information of ADC#2 allocated by DCMF for establishing PSAP and DCMF.
- the E-CSCF sends a re-invite request message to the PSAP.
- the PSAP receives the re-invite request message from the E-CSCF.
- E-CSCF after receiving the resource response message from DCMF, E-CSCF sends a re-invite request message to PSAP, and carries ADC SDP offer#2 in the re-invite request message to negotiate the description information of ADC#2 between DCMF and PSAP.
- the PSAP sends a 200 response message to the E-CSCF.
- the E-CSCF receives the 200 response message from the PSAP.
- the PSAP after receiving the re-invite request message, the PSAP completes the media negotiation according to the description information carried in the re-invite request message, and then sends a 200 response message to the E-CSCF.
- the 200 response message carries ADC SDP answer#2, wherein the ADC SDP answer#2 is the description information of ADC#2 determined by the PSAP negotiation for establishing the connection between the PSAP and the DCMF.
- E-CSCF sends ADC SDP answer#2 to DCMF.
- DCMF receives ADC SDP answer#2 from E-CSCF.
- the E-CSCF after receiving the 200 response message from the PSAP, the E-CSCF obtains ADC SDP answer#2 from the 200 response message, and then sends the ADC SDP answer#2 to the DCMF to complete the media negotiation of ADC#2 between the PSAP and the DCMF.
- the E-CSCF sends a 200 response message to the P-CSCF.
- the P-CSCF receives the 200 response message from the E-CSCF.
- E-CSCF after receiving the resource response message from DCMF, E-CSCF obtains ADC SDP answer#1 from the resource response message, and then sends a 200 response message to S-CSCF, and carries the ADC SDP answer#1 in the 200 response message.
- the P-CSCF sends a 200 response message to the UE.
- the UE receives the 200 response message from the P-CSCF.
- the P-CSCF forwards the 200 response message to the UE.
- the UE obtains ADC SDP answer#1 from the 200 response message, thereby completing the media negotiation of ADC#1 between the UE and the DCMF.
- ADC#1 is established between the DCMF and the UE.
- ADC#2 is established between DCMF and PSAP.
- DCMF completes the establishment of ADC with the calling UE and PSAP respectively.
- the UE and the PSAP can obtain the DC App through the established BDC, and then the DC App on the UE and the DC App on the PSAP can transmit information through the established ADC, as shown in S1930-S1935.
- S1930-S1935 are similar to S1716-S1721 in method 1700, and will not be repeated here for the sake of brevity.
- the process of UE and PSAP obtaining DC App in method 1900 can be executed at any time after the BDC creation process (i.e., after S1914 and S1915), and this application is not limited to this.
- FIG. 20 shows an exemplary flow chart of another method 1400 applicable to the network architecture shown in FIG. 16 .
- method 2000 after the emergency call between the UE and the PSAP is established, the UE initiates the establishment process of the BDC and the establishment process of the ADC respectively to reduce the connection delay of the emergency call. And in this embodiment, the ADC is anchored to the DCMF.
- the method 2000 is exemplarily described below in conjunction with the various steps in FIG. 20 .
- the UE initiates an emergency call through the initial INVITE process and establishes an IMS session with the PSAP.
- PSAP sends an off-hook 200OK response message to UE.
- UE receives the off-hook 200OK response message from PSAP.
- an emergency call between the UE and the PSAP can be established by the method 700 shown in FIG.
- S2002-S2015 are similar to S11902-S1915 in method 1900, and are not described here for brevity.
- the UE requests to establish an ADC.
- the following is an exemplary description of the ADC creation process in conjunction with S2016-S2025.
- the UE sends a re-invite request message to the P-CSCF.
- the P-CSCF receives the re-invite request message from the UE.
- the UE after determining that the emergency call between the UE and the PSAP is connected, the UE sends a re-invite request message to the P-CSCF to request negotiation to establish an ADC.
- the re-invite request message includes ADC SDP offer#1.
- the ADC SDP offer#1 is the description information used by the UE to establish the ADC, such as the IP address, port information, TLS ID and certificate, QoS requirements, etc. used by the UE to connect to the ADC.
- BDC SDP offer#1 and ADC SDP offer#1 please refer to the examples in S1426 of method 1400, which will not be repeated here.
- the P-CSCF sends a re-invite request message to the E-CSCF.
- the E-CSCF receives the re-invite request message from the P-CSCF.
- the P-CSCF after receiving the re-INVITE request message from the UE, the P-CSCF forwards the re-INVITE request message to the E-CSCF.
- S2018, MMTel AS determines to trigger the ADC creation process.
- the MMTel AS after receiving the re-invite request message from the P-CSCF, the MMTel AS finds that the re-invite request message carries ADC description information (i.e., the above-mentioned ADC SDP offer#1) and determines that the UE supports DC, it determines to trigger the ADC creation process, that is, trigger the DC call event report (see S2019 for details).
- ADC description information i.e., the above-mentioned ADC SDP offer#1
- E-CSCF sends a DC event notify message to DCMF.
- DCMF receives the DC event notify message from E-CSCF.
- the E-CSCF sends a DC activity notification message to the DCSF to report a DC call event of the emergency call to the DCSF.
- DCSF sends a DC control request message to DC.
- DC receives the DC control request message from DCMF.
- the DCSF determines that the current call is an emergency call and the ADC does not need to be anchored to the DCMF, then the DCSF sends a DC control request message to the E-CSCF to instruct to continue the call.
- the E-CSCF sends a re-invite request message to the PSAP.
- the PSAP receives the re-invite request message from the E-CSCF.
- the E-CSCF forwards the re-invite request message to the S-CSCF to negotiate the description information of ADC#1 between the UE and the PSAP.
- PSAP sends a 200 response message to E-CSCF.
- E-CSCF receives the 200 response message from PSAP through S-CSCF.
- the PSAP after receiving the re-invite request message, the PSAP completes the media negotiation according to the description information carried in the re-invite request message, and then sends a 200 response message to the E-CSCF through the S-CSCF.
- the 200 response message carries ADC SDP answer#1, wherein the ADC SDP answer#1 is the description information of ADC#1 determined by the PSAP negotiation for establishing the connection between the PSAP and the UE.
- the E-CSCF sends a 200 response message to the P-CSCF.
- the P-CSCF receives the 200 response message from the E-CSCF.
- the E-CSCF after receiving the 200 response message from the PSAP, the E-CSCF forwards the 200 response message to the P-CSCF, and the 200 response message carries ADC SDP answer#1.
- the S-CSCF sends a 200 response message to the UE.
- the UE receives the 200 response message from the S-CSCF.
- the P-CSCF forwards the 200 response message to the UE.
- the UE obtains ADC SDP answer#1 from the 200 response message, thereby completing the media negotiation of ADC#1 between the UE and the PSAP.
- ADC#1 is established between PSAP and UE.
- the UE and the PSAP can obtain the DC App through the established BDC, and then the DC App on the UE and the DC App on the PSAP can transmit information through the established ADC, as shown in S2026-S2029.
- S2026-S2029 are similar to S1817-S1820 in method 1800, and will not be repeated here for the sake of brevity.
- FIG. 21 shows an exemplary flow chart of another method 2100 of the network architecture shown in FIG. 16.
- UE initiates the establishment process of BDC to reduce the connection delay of the emergency call.
- BDC can be used to download data channel applications and can also be used to transmit additional communication information of data channel applications. That is, ADC can not be established in this embodiment.
- the following is an exemplary description of method 2100 in conjunction with the various steps in FIG. 21.
- the UE initiates an emergency call through an initial INVITE process and establishes an IMS session with the PSAP.
- an emergency call between the UE and the PSAP can be established by the method 700 shown in FIG.
- S2102-S2115 are similar to S1902-S1915 in method 1900, and are not described here for brevity.
- DCMF completes the establishment of BDC with the calling UE and PSAP respectively.
- the UE and the PSAP can obtain the DC App through the established BDC, and then the DC App on the UE and the DC App on the PSAP can transmit data through the established BDC.
- the following is an exemplary description in conjunction with S2116-S2121.
- DC App obtained from DCMF through BDC#1.
- the specific process is not limited in this application.
- the DC App here can be, for example, an emergency call applet.
- PSAP obtains DC App from DCMF through BDC#2. It is understandable that the DC App obtained by PSAP should be the same as the DC App obtained by UE.
- DC App on UE sends data #1, such as pictures, videos, location and other data, to DCMF through BDC #1.
- DCMF sends data #1 to DC App on PSAP through BDC #2.
- DCMF sends data #2 to DC App on UE through BDC #1.
- UE and PSAP can transmit pictures, videos, location and other data through the established ADC channel in the downloaded DC App.
- method 1100-method 1500, method 1700-method 2100 are described using UE and PSAP as an example of devices for conducting IMS calls, but the embodiments of the present application are not limited to this, that is, the embodiments of the present application can also be applied to scenarios where three or more devices conduct IMS calls.
- the embodiments of the present application also provide corresponding devices, which include modules for executing the corresponding methods in the above-mentioned method embodiments.
- the module can be software, hardware, or a combination of software and hardware. It can be understood that the technical features described in the above-mentioned method embodiments are also applicable to the following device embodiments. Therefore, the contents not described in detail can be referred to the above method embodiments, and for the sake of brevity, they will not be repeated here.
- FIG22 is a schematic block diagram of a communication device 10 provided in an embodiment of the present application.
- the device 10 includes a transceiver module 11 and/or a processing module 12.
- the transceiver module 11 can implement corresponding communication functions, and the processing module 12 is used to perform data processing, or in other words, the transceiver module 11 is used to perform operations related to receiving and sending, and the processing module 12 is used to perform other operations besides receiving and sending.
- the transceiver module 11 can also be called a communication interface or a communication unit.
- the device 10 may also include a storage module 13, which can be used to store instructions and/or data.
- the processing module 12 can read the instructions and/or data in the storage module so that the device implements the actions of the device or network element in the aforementioned method embodiments.
- the apparatus 10 may correspond to the first communication device in the above method embodiment (e.g., the first communication device in FIG. 8 or 9 , or the UE in FIG. 11 - 15 or FIG. 17 - 21 ), or a component of the first communication device (e.g., a chip).
- the first communication device in the above method embodiment e.g., the first communication device in FIG. 8 or 9 , or the UE in FIG. 11 - 15 or FIG. 17 - 21
- a component of the first communication device e.g., a chip
- the device 10 can implement the steps or processes executed by the first communication device in the above method embodiment, wherein the transceiver module 11 can be used to execute the transceiver related operations of the first communication device in the above method embodiment, and the processing module 12 can be used to execute the processing related operations of the first communication device in the above method embodiment.
- the device 10 may implement the steps or processes executed by the first communication device in method 800 or method 900 in the above method embodiments, or the UE in methods 1100-method 1500 or methods 1700-method 2100.
- the transceiver module 11 is used to receive a call response message from the second communication device, and the call response message indicates that the Internet Protocol Multimedia Subsystem IMS session between the first communication device and the second communication device is established; the transceiver module 11 is also used to send a re-invite request message to the session control function device, and the re-invite request message includes first description information for establishing a first data channel, and the first data channel is used to download a data channel application, and the data channel application is used to conduct communications other than voice calls or video calls between the first communication device and the second communication device.
- the apparatus 10 may correspond to the second communication device in the above method embodiment (e.g., the second communication device in FIG. 8 or 9 , or the PSAP in FIG. 11 - 15 or FIG. 17 - 21 ), or a component of the second communication device (e.g., a chip).
- the second communication device in the above method embodiment e.g., the second communication device in FIG. 8 or 9 , or the PSAP in FIG. 11 - 15 or FIG. 17 - 21
- a component of the second communication device e.g., a chip
- the device 10 can implement the steps or processes executed by the second communication device in the above method embodiment, wherein the transceiver module 11 can be used to execute the transceiver related operations of the second communication device in the above method embodiment, and the processing module 12 can be used to execute the processing related operations of the second communication device in the above method embodiment.
- the device 10 may correspond to the session control function device in the above method embodiment (for example, the session control function device in Figure 8 or Figure 9, or the MMTel AS in Figures 11 to 15, or the E-CSCF in Figures 17 to 21), or a component of the session control function device (such as a chip).
- the device 10 can implement the steps or processes executed by the session control function device in the above method embodiment, wherein the transceiver module 11 can be used to perform the transceiver-related operations of the session control function device in the above method embodiment, and the processing module 12 can be used to perform the above The processing-related operations of the session control function device in the method embodiment.
- the device 10 can implement the session control function network element in method 800 or 900 in the above method embodiment, or the steps or processes executed by the session control function device in methods 1100-1500 or methods 1700-2100.
- the transceiver module 11 is used to receive a re-invite request message from a first communication device, the re-invite request message includes first description information for establishing the first data channel, the first data channel is used to download a data channel application, the data channel application is used to communicate between the first communication device and the second communication device other than voice calls or video calls, and the IMS session between the first communication device and the second communication device has been established; the processing module 12 is used to trigger the establishment of the first data channel according to the re-invite request message.
- module here may refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (such as a shared processor, a dedicated processor or a group processor, etc.) and a memory for executing one or more software or firmware programs, a merged logic circuit and/or other suitable components that support the described functions.
- ASIC application specific integrated circuit
- processor such as a shared processor, a dedicated processor or a group processor, etc.
- memory for executing one or more software or firmware programs, a merged logic circuit and/or other suitable components that support the described functions.
- the device 10 can be specifically a terminal device in the above-mentioned embodiment, and can be used to execute the various processes and/or steps corresponding to the terminal device in the above-mentioned method embodiments; or, the device 10 can be specifically a network device in the above-mentioned embodiment, and can be used to execute the various processes and/or steps corresponding to the network device in the above-mentioned method embodiments. To avoid repetition, it will not be repeated here.
- the device 10 of each of the above schemes has the function of implementing the corresponding steps performed by the device (such as the first communication device, or the second communication device, or the session control function device) in the above method.
- This function can be implemented by hardware, or by hardware executing the corresponding software implementation.
- the hardware or software includes one or more modules corresponding to the above functions; for example, the transceiver module can be replaced by a transceiver (for example, the sending unit in the transceiver module can be replaced by a transmitter, and the receiving unit in the transceiver module can be replaced by a receiver), and other units, such as processing modules, can be replaced by processors to respectively perform the transceiver operations and related processing operations in each method embodiment.
- the transceiver module 11 may also be a transceiver circuit (for example, may include a receiving circuit and a sending circuit), and the processing module may be a processing circuit.
- FIG23 is a schematic diagram of another communication device 20 provided in an embodiment of the present application.
- the device 20 includes a processor 21, and the processor 21 is used to execute a computer program or instruction stored in a memory 22, or read data/signaling stored in the memory 22 to execute the method in each method embodiment above.
- the processor 21 is used to execute a computer program or instruction stored in a memory 22, or read data/signaling stored in the memory 22 to execute the method in each method embodiment above.
- the device 20 further includes a memory 22, and the memory 22 is used to store computer programs or instructions and/or data.
- the memory 22 can be integrated with the processor 21, or can also be separately arranged.
- the memory 22 is one or more.
- the device 20 further includes a transceiver 23, and the transceiver 23 is used for receiving and/or sending signals.
- the processor 21 is used to control the transceiver 23 to receive and/or send signals.
- the apparatus 20 is used to implement the operations performed by the first communication device in each of the above method embodiments.
- the apparatus 20 is used to implement the operations performed by the second communication device in each of the above method embodiments.
- the apparatus 20 is used to implement the operations performed by the session control function device in each of the above method embodiments.
- processors mentioned in the embodiments of the present application may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.
- the general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.
- the memory mentioned in the embodiments of the present application may be a volatile memory and/or a non-volatile memory.
- the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM) or a flash memory.
- the volatile memory may be a random access memory (RAM).
- RAM may be used as an external cache.
- RAM includes the following forms: static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous connection dynamic random access memory (SLDRAM) and direct rambus RAM (DR RAM).
- SRAM static random access memory
- DRAM dynamic random access memory
- SDRAM synchronous dynamic random access memory
- DDR SDRAM double data rate synchronous dynamic random access memory
- ESDRAM enhanced synchronous dynamic random access memory
- SLDRAM synchronous connection dynamic random access memory
- DR RAM direct rambus RAM
- the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, the memory (storage module) can be integrated into the processor.
- memory described herein is intended to include, but is not limited to, these and any other suitable types of memory.
- FIG24 is a schematic diagram of a chip system 30 provided in an embodiment of the present application.
- the chip system 30 (or also referred to as a processing system) includes a logic circuit 31 and an input/output interface 32.
- the logic circuit 31 can be a processing circuit in the chip system 30.
- the logic circuit 31 can be coupled to the storage unit and call the instructions in the storage unit so that the chip system 30 can implement the methods and functions of each embodiment of the present application.
- the input/output interface 32 can be an input/output circuit in the chip system 30, outputting information processed by the chip system 30, or inputting data or signaling information to be processed into the chip system 30 for processing.
- the chip system 30 is used to implement the operations performed by the network function virtualization orchestrator in the above method embodiments.
- the logic circuit 31 is used to implement the processing-related operations performed by the first communication device in the above method embodiments, such as the processing-related operations performed by the first communication device in the embodiments shown in Figures 8 or 9 or the UE in Figures 11-15 or 17-21;
- the input/output interface 32 is used to implement the sending and/or receiving-related operations performed by the first communication device in the above method embodiments, such as the sending and/or receiving-related operations performed by the first communication device in the embodiments shown in Figures 8 or 9 or the UE in Figures 11-15 or 17-21.
- the chip system 30 is used to implement the operations performed by the second communication device in the above method embodiments, such as the processing-related operations performed by the second communication device in the embodiment shown in Figure 8 or Figure 9 or the UE in Figures 11-15 or Figures 17-21;
- the input/output interface 32 is used to implement the sending and/or receiving-related operations performed by the second communication device in the above method embodiments, such as the sending and/or receiving-related operations performed by the second communication device in the embodiment shown in Figure 8 or Figure 9 or the PSAP in Figures 11-15 or Figures 17-21.
- the chip system 30 is used to implement the operations performed by the application server in the above method embodiments, such as the processing-related operations performed by the application server in the embodiment shown in Figure 8 or Figure 9 or the IMS AS 1 in Figures 11-15 or Figures 17-21;
- the input/output interface 32 is used to implement the sending and/or receiving-related operations performed by the application server in the above method embodiments, such as the sending and/or receiving-related operations performed by the application server in the embodiment shown in Figure 8 or Figure 9 or the IMS AS 1 in Figures 11-15 or Figures 17-21.
- the chip system 30 is used to implement the operations performed by the data channel server in the above method embodiments, such as the processing-related operations performed by the data channel server in the embodiment shown in Figure 8 or Figure 9 or the DCS 1 in Figures 11-15 or Figures 17-21;
- the input/output interface 32 is used to implement the sending and/or receiving-related operations performed by the data channel server in the above method embodiments, such as the sending and/or receiving-related operations performed by the data channel server in the embodiment shown in Figure 8 or Figure 9 or the DCS 1 in Figures 11-15 or Figures 17-21.
- An embodiment of the present application also provides a computer-readable storage medium on which computer instructions for implementing the methods executed by the device in the above-mentioned method embodiments are stored.
- An embodiment of the present application also provides a computer program product, comprising instructions, which, when executed by a computer, implement the methods performed by the device in the above-mentioned method embodiments.
- the embodiment of the present application further provides a communication system, including the aforementioned application server and data channel server.
- a communication system including the aforementioned application server and data channel server.
- it also includes the aforementioned first communication device and second communication device.
- the disclosed devices and methods can be implemented in other ways.
- the device embodiments described above are only schematic.
- the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed.
- the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.
- all or part of the embodiments can be implemented by software, hardware, firmware or any combination thereof.
- all or part of the embodiments can be implemented in the form of a computer program product.
- the computer program product includes one or more computer instructions.
- the computer program instructions When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiments of the present application is generated in whole or in part.
- the computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device.
- the computer can be a personal computer, a server, or a network device.
- the computer instructions can be stored in a computer-readable storage medium, or transferred from one computer-readable storage medium to another computer-readable storage medium.
- the computer instructions can be transmitted from one computer-readable storage medium to another computer-readable storage medium.
- a website, computer, server or data center transmits to another website, computer, server or data center via wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means.
- the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or data center that includes one or more available media integrated therein.
- the available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid state disk (SSD), etc.
- the aforementioned available medium includes, but is not limited to, various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.
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Abstract
Provided in the present application are a communication method, apparatus and system, which can be applied to the technical field of Internet protocol (IP) multimedia subsystem (IMS) calls. The method may comprise: after determining that an IMS session has been established between a first communication device and a second communication device, the first communication device sending a re-invite request message to trigger the establishment of a first data channel, wherein the first data channel is used for downloading a data channel application, which is used for performing communication other than voice calls or video calls between the first communication device and the second communication device. On the basis of the solution, the latency of IMS session establishment between a first calling device and a second calling device can be shortened, thereby improving the calling efficiency.
Description
本申请要求于2022年11月2日提交中国国家知识产权局、申请号为202211364765.4、申请名称为“通信方法、装置和系统”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on November 2, 2022, with application number 202211364765.4 and application name “Communication Methods, Devices and Systems”, the entire contents of which are incorporated by reference in this application.
本申请涉及通信技术领域,尤其涉及一种通信方法、装置和系统。The present application relates to the field of communication technology, and in particular to a communication method, device and system.
因特网协议(internet protocol,IP)多媒体子系统(IP multimedia subsystem,IMS)是一种用于提供多媒体通信业务的网络架构。Internet protocol (IP) multimedia subsystem (IMS) is a network architecture used to provide multimedia communication services.
在IMS网络架构中,用户设备可以通过建立数据通道,来下载数据通道应用(data channel application,DC App)以及传输数据通道应用的数据,从而获取除语音通话或视频通话之外的更丰富的通信服务,如屏幕共享、位置共享、叠加增强现实(augmented reality,AR)特效等。In the IMS network architecture, user devices can establish data channels to download data channel applications (DC App) and transmit data of data channel applications, thereby obtaining richer communication services in addition to voice calls or video calls, such as screen sharing, location sharing, and overlaying augmented reality (AR) effects.
然而,数据通道的建立可能会对通话体验产生负面影响,如延迟了电话的接通;如何降低数据通道的建立对通话体验的负面影响,是当前需要考虑的问题。However, the establishment of a data channel may have a negative impact on the call experience, such as delaying the call connection; how to reduce the negative impact of the establishment of a data channel on the call experience is an issue that needs to be considered currently.
发明内容Summary of the invention
本申请提供了一种通信方法、装置和系统,可以降低数据通道的建立对通话体验的负面影响。The present application provides a communication method, device and system, which can reduce the negative impact of establishing a data channel on the call experience.
第一方面,提供了一种通信方法,该方法可以由第一通信设备执行,也可以由第一通信设备的组成部件(如芯片或电路等)执行。为了方便,这里以第一通信设备执行为例进行说明。作为示例,该第一通信设备可以为终端设备。In a first aspect, a communication method is provided, which can be executed by a first communication device or by a component (such as a chip or circuit) of the first communication device. For convenience, the first communication device is used as an example for description. As an example, the first communication device can be a terminal device.
该通信方法包括:第一通信设备接收来自第二通信设备的呼叫响应消息,该呼叫响应消息指示该第一通信设备与该第二通信设备之间的互联网协议多媒体子系统IMS会话建立完成;响应于该呼叫响应消息,该第一通信设备向会话控制功能设备发送重邀请re-invite请求消息,该re-invite请求消息包含用于建立第一数据通道的第一描述信息,该第一数据通道用于下载数据通道应用,该数据通道应用用于在该第一通信设备与该第二通信设备之间进行除语音通话或视频通话之外的通信。The communication method includes: a first communication device receives a call response message from a second communication device, the call response message indicating that an Internet Protocol Multimedia Subsystem IMS session between the first communication device and the second communication device is established; in response to the call response message, the first communication device sends a re-invite request message to a session control function device, the re-invite request message includes first description information for establishing a first data channel, the first data channel is used to download a data channel application, and the data channel application is used for communication other than voice calls or video calls between the first communication device and the second communication device.
基于上述方案,通过在第一通信设备与第二通信设备之间的IMS会话建立完成之后,才发起第一数据通道的建立流程,从而降低第一数据通道的建立对第一通信设备与第二通信设备之间的通话体验的负面影响。例如,可以降低因第一数据通道的建立而导致的IMS会话建立的延迟程度,从而可以使两个通信设备之间的呼叫尽快接通,提高用户体验。Based on the above solution, the establishment process of the first data channel is initiated after the IMS session between the first communication device and the second communication device is established, thereby reducing the negative impact of the establishment of the first data channel on the call experience between the first communication device and the second communication device. For example, the delay in establishing the IMS session caused by the establishment of the first data channel can be reduced, so that the call between the two communication devices can be connected as soon as possible, improving the user experience.
结合第一方面,在第一方面的某些实现方式中,该re-invite请求消息还包含用于建立第二数据通道的第二描述信息,该第二数据通道用于传输该数据通道应用的附加通信信息,该第一描述信息用于该第一通信设备建立该第一数据通道,该第二描述信息用于该第一通信设备建立该第二数据通道。In combination with the first aspect, in certain implementations of the first aspect, the re-invite request message also includes second description information for establishing a second data channel, the second data channel is used to transmit additional communication information applied by the data channel, the first description information is used by the first communication device to establish the first data channel, and the second description information is used by the first communication device to establish the second data channel.
基于上述方案,第一通信设备通过同一re-invite请求消息请求建立第一数据通道和第二数据通道,从而降低数据通道的建立时延,提高用户体验。Based on the above solution, the first communication device requests to establish the first data channel and the second data channel through the same re-invite request message, thereby reducing the establishment delay of the data channel and improving the user experience.
结合第一方面,在第一方面的某些实现方式中,该方法还包括:该第一通信设备指示该第二数据通道锚定到数据通道媒体功能网元;或者,该第一通信设备指示该第二数据通道不锚定到该数据通道媒体功能网元。In combination with the first aspect, in certain implementations of the first aspect, the method further includes: the first communication device indicates that the second data channel is anchored to the data channel media function network element; or, the first communication device indicates that the second data channel is not anchored to the data channel media function network element.
结合第一方面,在第一方面的某些实现方式中,该第一数据通道还用于传输该数据通道应用的附加通信信息。In combination with the first aspect, in some implementations of the first aspect, the first data channel is also used to transmit additional communication information applied by the data channel.
基于上述方案,第一数据通道既可以用于下载数据通道应用,又可以传输数据通道应用的附加通信信息,从而不需要再建立其他数据通道,便可以实现第一通信设备与第二通信设备之间除语音通话或视频通话以外的通信,可以降低通信时延,提高用户体验。Based on the above scheme, the first data channel can be used to download the data channel application and to transmit additional communication information of the data channel application, so that there is no need to establish other data channels, and communication other than voice calls or video calls can be achieved between the first communication device and the second communication device, which can reduce communication delay and improve user experience.
结合第一方面,在第一方面的某些实现方式中,该IMS会话为通过IMS紧急呼叫建立的会话,该第二通信设备为公共安全应答点。
In combination with the first aspect, in some implementations of the first aspect, the IMS session is a session established through an IMS emergency call, and the second communication device is a public safety answering point.
基于上述方案,第一方面所提供的方案可以应用于紧急呼叫场景中。在该场景中,可以使得用户的报警信息可以得到尽快的处理,从而有效保障用户的声明和财产安全。Based on the above solution, the solution provided in the first aspect can be applied to an emergency call scenario, in which the user's alarm information can be processed as quickly as possible, thereby effectively protecting the user's statement and property safety.
结合第一方面,在第一方面的某些实现方式中,该呼叫响应消息为摘机200OK响应消息。In combination with the first aspect, in some implementations of the first aspect, the call response message is an off-hook 200 OK response message.
结合第一方面,在第一方面的某些实现方式中,在该第一通信设备接收来自第二通信设备的呼叫响应消息之前,该方法还包括:该第一通信设备向该第二通信设备发送初始邀请invite请求消息,该初始invite请求消息用于请求创建该IMS会话;则该呼叫响应消息为该初始invite请求消息的响应消息。In combination with the first aspect, in certain implementations of the first aspect, before the first communication device receives a call response message from the second communication device, the method further includes: the first communication device sends an initial invitation invite request message to the second communication device, and the initial invite request message is used to request the creation of the IMS session; then the call response message is a response message to the initial invite request message.
第二方面,提供了一种通信方法,该方法可以由会话控制功能设备执行,也可以由会话控制功能设备的组成部件(如芯片或电路等)执行。为了方便,这里以会话控制功能设备执行为例进行说明。作为示例,该会话控制功能设备可以为多媒体电话应用服务器,或者为紧急呼叫会话控制功能网元。In a second aspect, a communication method is provided, which can be executed by a session control function device, or by a component (such as a chip or circuit, etc.) of the session control function device. For convenience, the execution of the session control function device is taken as an example for illustration. As an example, the session control function device can be a multimedia phone application server, or an emergency call session control function network element.
该通信方法包括:会话控制功能设备接收来自第一通信设备的重邀请re-invite请求消息,该re-invite请求消息包含用于建立该第一数据通道的第一描述信息,该第一数据通道用于下载数据通道应用,该数据通道应用用于在该第一通信设备与该第二通信设备之间进行除语音通话或视频通话之外的通信,该第一通信设备与该第二通信设备之间的IMS会话已建立完成;该会话控制功能设备根据该re-invite请求消息触发该第一数据通道的建立。The communication method includes: a session control function device receives a re-invite request message from a first communication device, the re-invite request message includes first description information for establishing the first data channel, the first data channel is used to download a data channel application, the data channel application is used to perform communications other than voice calls or video calls between the first communication device and the second communication device, and an IMS session between the first communication device and the second communication device has been established; the session control function device triggers establishment of the first data channel according to the re-invite request message.
基于上述方案,第一数据通道的建立流程是在第一通信设备与第二通信设备之间的IMS会话建立完成之后触发的,也就是说,该会话控制功能设备接收到的该re-invite请求消息是第一通信设备在与第二通信设备之间的IMS会话建立完成之后发送的。通过在IMS会话建立完成之后再建立第一数据通道,从而可以减少IMS会话建立的时延,提高用户体验。Based on the above solution, the process of establishing the first data channel is triggered after the IMS session between the first communication device and the second communication device is established, that is, the re-invite request message received by the session control function device is sent by the first communication device after the IMS session between the first communication device and the second communication device is established. By establishing the first data channel after the IMS session is established, the delay of establishing the IMS session can be reduced and the user experience can be improved.
结合第二方面,在第二方面的某些实现方式中,该re-invite请求消息还包含用于建立第二数据通道的第二描述信息,该第二数据通道用于传输该附加通信信息,该第一描述信息用于第一通信设备建立该第一数据通道,该第二描述信息用于该第一通信色何必建立该第二数据通道。In combination with the second aspect, in certain implementations of the second aspect, the re-invite request message also includes second description information for establishing a second data channel, the second data channel is used to transmit the additional communication information, the first description information is used by the first communication device to establish the first data channel, and the second description information is used by the first communication device to establish the second data channel.
基于上述方案,第一通信设备通过同一re-invite请求消息请求建立第一数据通道和第二数据通道,从而降低数据通道的建立时延,提高用户体验。Based on the above solution, the first communication device requests to establish the first data channel and the second data channel through the same re-invite request message, thereby reducing the establishment delay of the data channel and improving the user experience.
结合第二方面,在第二方面的某些实现方式中,该第一数据通道包括该第一通信设备与该数据通道媒体功能网元之间的第一引导数据通道,以及第二通信设备与该数据通道媒体功能网元之间的第二引导数据通道,该第二数据通道包括该第一通信设备与该数据通道媒体功能网元之间的第一应用数据通道,以及第二通信设备与该数据通道媒体功能网元之间的第二应用数据通道;该会话控制功能设备根据该re-invite请求消息触发该第一数据通道的建立,包括:该会话控制功能设备向数据通道媒体功能网元请求第三描述信息、第四描述信息、第五描述信息以及第六描述信息;其中,该第三描述信息用于该数据通道媒体功能网元建立该第一引导数据通道,该第四描述信息用于该数据通道媒体功能网元建立该第一应用数据通道,该第五描述信息用于该数据通道媒体功能网元建立该第二引导数据通道,该第六描述信息用于该数据通道媒体功能网元建立该第二应用数据通道;该会话控制功能设备向该第二通信设备发送请求消息,该请求消息包括该第五描述信息和该第六描述信息;该会话控制功能设备接收来自该第二通信设备的响应消息,该响应消息包括第七描述信息以及第八描述信息,该第七描述信息用于该第二通信设备建立该第二引导数据通道,该第八描述信息用于该第二通信设备建立该第二应用数据通道;该会话控制功能设备向该第一通信设备发送该第三描述信息和该第四描述信息,以及向该数据通道媒体功能网元发送该第七描述信息和该第八描述信息。In combination with the second aspect, in some implementations of the second aspect, the first data channel includes a first boot data channel between the first communication device and the data channel media function network element, and a second boot data channel between the second communication device and the data channel media function network element, and the second data channel includes a first application data channel between the first communication device and the data channel media function network element, and a second application data channel between the second communication device and the data channel media function network element; the session control function device triggers the establishment of the first data channel according to the re-invite request message, including: the session control function device requests the data channel media function network element for third description information, fourth description information, fifth description information and sixth description information; wherein the third description information is used for the data channel media function network element to establish the first boot data channel, and the fourth description information is used for the data The data channel media function network element establishes the first application data channel, the fifth description information is used by the data channel media function network element to establish the second guided data channel, and the sixth description information is used by the data channel media function network element to establish the second application data channel; the session control function device sends a request message to the second communication device, and the request message includes the fifth description information and the sixth description information; the session control function device receives a response message from the second communication device, and the response message includes the seventh description information and the eighth description information, the seventh description information is used by the second communication device to establish the second guided data channel, and the eighth description information is used by the second communication device to establish the second application data channel; the session control function device sends the third description information and the fourth description information to the first communication device, and sends the seventh description information and the eighth description information to the data channel media function network element.
结合第二方面,在第二方面的某些实现方式中,该第一数据通道包括该第一通信设备与该数据通道媒体功能网元之间的第三引导数据通道,以及第二通信设备与该数据通道媒体功能网元之间的第四引导数据通道,该第二数据通道包括该第一通信设备与该第二通信设备之间的第三应用数据通道;该会话控制功能设备根据该re-invite请求消息触发该通道的建立,包括:该会话控制功能设备向该数据通道媒体功能网元请求第九描述信息和第十描述信息,该第九描述信息用于该数据通道媒体功能网元建立该第三引导数据通道,该第十描述信息用于该数据通道媒体功能网元建立该第四引导数据通道;该会话控制功能设备向该第二通信设备发送请求消息,该请求消息包括该第二描述信息和该第十描述信息;该会话控制功能设备接收来自该第二通信设备的响应消息,该响应消息包括第十一描述信息和第十二描述信息,该第十一描述信息用于该第二通信设备建立该第四引导数据通道,该第十二描述信息用于该第二通信设备建立该第三应用数据通道;该会话控制功能设备向该第一通信设备发送该第九描述信息和该第十二描述信息,以及向该数据通道媒体功能网元发送该第十一描述信息。
In combination with the second aspect, in some implementations of the second aspect, the first data channel includes a third boot data channel between the first communication device and the data channel media function network element, and a fourth boot data channel between the second communication device and the data channel media function network element, and the second data channel includes a third application data channel between the first communication device and the second communication device; the session control function device triggers the establishment of the channel according to the re-invite request message, including: the session control function device requests the data channel media function network element for ninth description information and tenth description information, the ninth description information is used for the data channel media function network element to establish the third boot data channel, and the tenth description information The information is used by the data channel media function network element to establish the fourth guided data channel; the session control function device sends a request message to the second communication device, and the request message includes the second description information and the tenth description information; the session control function device receives a response message from the second communication device, and the response message includes the eleventh description information and the twelfth description information, the eleventh description information is used by the second communication device to establish the fourth guided data channel, and the twelfth description information is used by the second communication device to establish the third application data channel; the session control function device sends the ninth description information and the twelfth description information to the first communication device, and sends the eleventh description information to the data channel media function network element.
结合第二方面,在第二方面的某些实现方式中,该第一数据通道还用于传输该附加通信信息。In combination with the second aspect, in some implementations of the second aspect, the first data channel is also used to transmit the additional communication information.
基于上述方案,第一数据通道既可以用于下载数据通道应用,又可以传输数据通道应用的附加通信信息,从而不需要再建立其他数据通道,便可以实现第一通信设备与第二通信设备之间除语音通话或视频通话以外的通信,可以降低通信时延,提高用户体验。Based on the above scheme, the first data channel can be used to download the data channel application and to transmit additional communication information of the data channel application, so that there is no need to establish other data channels, and communication other than voice calls or video calls can be achieved between the first communication device and the second communication device, which can reduce communication delay and improve user experience.
结合第二方面,在第二方面的某些实现方式中,该会话控制功能设备为多媒体电话应用服务器;在该会话控制功能设备接收来自第一通信设备的重邀请re-invite请求消息之前,该方法还包括:该会话控制功能设备接收来自该第一通信设备的初始邀请invite请求消息,该初始invite请求消息用于该第一通信设备请求建立该IMS会话;该会话控制功能设备根据该初始invite请求消息,压制触发建立该第一数据通道和/或第二数据通道。In combination with the second aspect, in certain implementations of the second aspect, the session control function device is a multimedia telephone application server; before the session control function device receives a re-invite request message from the first communication device, the method also includes: the session control function device receives an initial invite request message from the first communication device, and the initial invite request message is used by the first communication device to request to establish the IMS session; the session control function device suppresses the trigger for establishing the first data channel and/or the second data channel according to the initial invite request message.
基于上述方案,会话控制功能设备在第一通信设备与第二通信设备之间的IMS会话建立过程,压制触发建立第一数据通道和/或第二数据通道,从而可以避免因建立第一数据通道和/或第二数据通道,导致第一通信设备与第二通信设备之间的IMS会话建立的时延变大的问题,从而可以提高通话的效率。Based on the above scheme, the session control function device suppresses the triggering of establishing the first data channel and/or the second data channel during the IMS session establishment process between the first communication device and the second communication device, thereby avoiding the problem of a longer delay in establishing the IMS session between the first communication device and the second communication device due to the establishment of the first data channel and/or the second data channel, thereby improving the efficiency of the call.
结合第二方面,在第二方面的某些实现方式中,该IMS会话为通过IMS紧急呼叫建立的会话,该会话控制网元为紧急呼叫会话控制功能网元或者多媒体电话应用服务器,该第二通信设备为公共安全应答点。In combination with the second aspect, in certain implementations of the second aspect, the IMS session is a session established through an IMS emergency call, the session control network element is an emergency call session control function network element or a multimedia telephone application server, and the second communication device is a public safety answering point.
基于上述方案,第一方面所提供的方案可以应用于紧急呼叫场景中。在该场景中,可以使得用户的报警信息可以得到尽快的处理,从而有效保障用户的声明和财产安全。Based on the above solution, the solution provided in the first aspect can be applied to an emergency call scenario, in which the user's alarm information can be processed as quickly as possible, thereby effectively protecting the user's statement and property safety.
第三方面,提供了一种通信方法,该方法包括:第二通信设备向第一通信设备发送呼叫响应消息,该呼叫响应消息用于指示第一通信设备与该第二通信设备之间的互联网协议多媒体子系统IMS会话建立完成;响应于该呼叫响应消息,该第一通信设备发送重邀请re-invite请求消息,该re-invite请求消息包含用于建立第一数据通道的第一描述信息,该第一数据通道用于下载数据通道应用,该数据通道应用用于在该第一通信设备与该第二通信设备之间进行除语音通话或视频通话之外的通信;该会话控制功能设备接收来自该第一通信设备的该re-invite请求消息;该会话控制功能设备根据该re-invite请求消息触发该第一数据通道的建立。According to a third aspect, a communication method is provided, comprising: a second communication device sends a call response message to a first communication device, the call response message being used to indicate that establishment of an Internet Protocol Multimedia Subsystem (IMS) session between the first communication device and the second communication device is complete; in response to the call response message, the first communication device sends a re-invite request message, the re-invite request message comprising first description information for establishing a first data channel, the first data channel being used to download a data channel application, the data channel application being used for communication other than voice calls or video calls between the first communication device and the second communication device; the session control function device receives the re-invite request message from the first communication device; and the session control function device triggers establishment of the first data channel according to the re-invite request message.
结合第三方面,在第三方面的某些实现方式中,该re-invite请求消息还包含用于建立第二数据通道的第二描述信息,该第二数据通道用于传输该附加通信信息,该第一描述信息用于该第一通信设备建立该第一数据通道,该第二描述信息用于该第一通信设备建立该第二数据通道。In combination with the third aspect, in certain implementations of the third aspect, the re-invite request message also includes second description information for establishing a second data channel, the second data channel is used to transmit the additional communication information, the first description information is used by the first communication device to establish the first data channel, and the second description information is used by the first communication device to establish the second data channel.
结合第三方面,在第三方面的某些实现方式中,该第一数据通道包括该第一通信设备与该数据通道媒体功能网元之间的第一引导数据通道,以及第二通信设备与该数据通道媒体功能网元之间的第二引导数据通道,该第二数据通道包括该第一通信设备与该数据通道媒体功能网元之间的第一应用数据通道,以及第二通信设备与该数据通道媒体功能网元之间的第二应用数据通道;该会话控制功能设备根据该re-invite请求消息触发该第一数据通道的建立,包括:该会话控制功能设备向数据通道媒体功能网元请求第三描述信息、第四描述信息、第五描述信息以及第六描述信息;其中,该第三描述信息用于该数据通道媒体功能网元建立该第一引导数据通道,该第四描述信息用于该数据通道媒体功能网元建立该第一应用数据通道,该第五描述信息用于该数据通道媒体功能网元建立该第二引导数据通道,该第六描述信息用于该数据通道媒体功能网元建立该第二应用数据通道;该会话控制功能设备向该第二通信设备发送请求消息,该请求消息包括该第五描述信息和该第六描述信息;该会话控制功能设备接收来自该第二通信设备的响应消息,该响应消息包括第七描述信息以及第八描述信息,该第七描述信息用于该第二通信设备建立该第二引导数据通道,该第八描述信息用于该第二通信设备建立该第二应用数据通道;该会话控制功能设备向该第一通信设备发送该第三描述信息和该第四描述信息,以及向该数据通道媒体功能网元发送该第七描述信息和该第八描述信息。In combination with the third aspect, in certain implementations of the third aspect, the first data channel includes a first boot data channel between the first communication device and the data channel media function network element, and a second boot data channel between the second communication device and the data channel media function network element, the second data channel includes a first application data channel between the first communication device and the data channel media function network element, and a second application data channel between the second communication device and the data channel media function network element; the session control function device triggers the establishment of the first data channel according to the re-invite request message, including: the session control function device requests the data channel media function network element for third description information, fourth description information, fifth description information and sixth description information; wherein the third description information is used for the data channel media function network element to establish the first boot data channel, and the fourth description information is used for the data channel media function network element The data channel media function network element establishes the first application data channel, the fifth description information is used by the data channel media function network element to establish the second guided data channel, and the sixth description information is used by the data channel media function network element to establish the second application data channel; the session control function device sends a request message to the second communication device, and the request message includes the fifth description information and the sixth description information; the session control function device receives a response message from the second communication device, and the response message includes the seventh description information and the eighth description information, the seventh description information is used by the second communication device to establish the second guided data channel, and the eighth description information is used by the second communication device to establish the second application data channel; the session control function device sends the third description information and the fourth description information to the first communication device, and sends the seventh description information and the eighth description information to the data channel media function network element.
结合第三方面,在第三方面的某些实现方式中,该第一数据通道包括该第一通信设备与该数据通道媒体功能网元之间的第三引导数据通道,以及第二通信设备与该数据通道媒体功能网元之间的第四引导数据通道,该第二数据通道包括该第一通信设备与该第二通信设备之间的第三应用数据通道;该会话控制功能设备根据该re-invite请求消息触发该通道的建立,包括:该会话控制功能设备向该数据通道媒体功能网元请求第九描述信息和第十描述信息,该第九描述信息用于该数据通道媒体功能网元建立该第三引导数据通道,该第十描述信息用于该数据通道媒体功能网元建立该第四引导数据通道;该会话控制功能设备向该第二通信设备发送请求消息,该请求消息包括该第二描述信息和该第十描述信息;该会话控制
功能设备接收来自该第二通信设备的响应消息,该响应消息包括第十一描述信息和第十二描述信息,该第十一描述信息用于该第二通信设备建立该第四引导数据通道,该第十二描述信息用于该第二通信设备建立该第三应用数据通道;该会话控制功能设备向该第一通信设备发送该第九描述信息和该第十二描述信息,以及向该数据通道媒体功能网元发送该第十一描述信息。In combination with the third aspect, in certain implementations of the third aspect, the first data channel includes a third guided data channel between the first communication device and the data channel media function network element, and a fourth guided data channel between the second communication device and the data channel media function network element, and the second data channel includes a third application data channel between the first communication device and the second communication device; the session control function device triggers the establishment of the channel according to the re-invite request message, including: the session control function device requests ninth description information and tenth description information from the data channel media function network element, the ninth description information is used by the data channel media function network element to establish the third guided data channel, and the tenth description information is used by the data channel media function network element to establish the fourth guided data channel; the session control function device sends a request message to the second communication device, and the request message includes the second description information and the tenth description information; the session control The functional device receives a response message from the second communication device, the response message including eleventh description information and twelfth description information, the eleventh description information is used by the second communication device to establish the fourth boot data channel, and the twelfth description information is used by the second communication device to establish the third application data channel; the session control functional device sends the ninth description information and the twelfth description information to the first communication device, and sends the eleventh description information to the data channel media function network element.
结合第三方面,在第三方面的某些实现方式中,该第一数据通道还用于传输该附加通信信息。In combination with the third aspect, in some implementations of the third aspect, the first data channel is also used to transmit the additional communication information.
结合第三方面,在第三方面的某些实现方式中,该会话控制功能设备为多媒体电话应用服务器;在该会话控制功能设备接收来自第一通信设备的重邀请re-invite请求消息之前,该方法还包括:该会话控制功能设备接收来自该第一通信设备的初始邀请invite请求消息,该初始invite请求消息用于该第一通信设备请求建立该IMS会话;该会话控制功能设备根据该初始invite请求消息,压制触发建立该第一数据通道和/或第二数据通道。In combination with the third aspect, in certain implementations of the third aspect, the session control function device is a multimedia telephone application server; before the session control function device receives a re-invite request message from the first communication device, the method also includes: the session control function device receives an initial invite request message from the first communication device, and the initial invite request message is used by the first communication device to request to establish the IMS session; the session control function device suppresses the trigger to establish the first data channel and/or the second data channel according to the initial invite request message.
结合第三方面,在第三方面的某些实现方式中,该IMS会话为通过IMS紧急呼叫建立的会话,该第二通信设备为公共安全应答点。In combination with the third aspect, in some implementations of the third aspect, the IMS session is a session established through an IMS emergency call, and the second communication device is a public safety answering point.
第四方面,提供了一种通信装置,装置包括:收发模块,用于接收来自第二通信设备的呼叫响应消息,该呼叫响应消息指示该第一通信设备与该第二通信设备之间的互联网协议多媒体子系统IMS会话建立完成;该收发模块,还用于向会话控制功能设备发送重邀请re-invite请求消息,该re-invite请求消息包含用于建立第一数据通道的第一描述信息,该第一数据通道用于下载数据通道应用,该数据通道应用用于在该第一通信设备与该第二通信设备之间进行除语音通话或视频通话之外的通信。In a fourth aspect, a communication device is provided, comprising: a transceiver module for receiving a call response message from a second communication device, the call response message indicating that an Internet Protocol Multimedia Subsystem IMS session between the first communication device and the second communication device is established; the transceiver module is also used to send a re-invite request message to a session control function device, the re-invite request message including first description information for establishing a first data channel, the first data channel being used to download a data channel application, the data channel application being used for communication other than voice calls or video calls between the first communication device and the second communication device.
结合第四方面,在第四方面的某些实现方式中,该re-invite请求消息还包含用于建立第二数据通道的第二描述信息,该第二数据通道用于传输该数据通道应用的附加通信信息,该第一描述信息用于该第一通信设备建立该第一数据通道,该第二描述信息用于该第一通信设备建立该第二数据通道。In combination with the fourth aspect, in certain implementations of the fourth aspect, the re-invite request message also includes second description information for establishing a second data channel, the second data channel is used to transmit additional communication information applied by the data channel, the first description information is used by the first communication device to establish the first data channel, and the second description information is used by the first communication device to establish the second data channel.
结合第四方面,在第四方面的某些实现方式中,该装置还包括:处理模块,用于指示该应用数据通道锚定到数据通道媒体功能网元;或者,该第一通信设备指示该应用数据通道不锚定到该数据通道媒体功能网元。In combination with the fourth aspect, in certain implementations of the fourth aspect, the device also includes: a processing module, used to indicate that the application data channel is anchored to the data channel media function network element; or, the first communication device indicates that the application data channel is not anchored to the data channel media function network element.
结合第四方面,在第四方面的某些实现方式中,该第一数据通道还用于传输该数据通道应用的附加通信信息。In combination with the fourth aspect, in certain implementations of the fourth aspect, the first data channel is also used to transmit additional communication information applied by the data channel.
结合第四方面,在第四方面的某些实现方式中,该IMS会话为通过IMS紧急呼叫建立的会话,该第二通信设备为公共安全应答点。In combination with the fourth aspect, in certain implementations of the fourth aspect, the IMS session is a session established through an IMS emergency call, and the second communication device is a public safety answering point.
基于上述方案,第四方面所提供的方案可以应用于紧急呼叫场景中。Based on the above solution, the solution provided in the fourth aspect can be applied to emergency call scenarios.
结合第四方面,在第四方面的某些实现方式中,该呼叫响应消息为摘机200OK响应消息。In combination with the fourth aspect, in some implementations of the fourth aspect, the call response message is an off-hook 200OK response message.
结合第四方面,在第四方面的某些实现方式中,该收发模块,还用于向该第二通信设备发送初始邀请invite请求消息,该初始invite请求消息用于请求创建该IMS会话;则该呼叫响应消息为该初始invite请求消息的响应消息。In combination with the fourth aspect, in certain implementations of the fourth aspect, the transceiver module is further used to send an initial invite request message to the second communication device, where the initial invite request message is used to request the creation of the IMS session; then the call response message is a response message to the initial invite request message.
第五方面,提供了一种通信装置,该装置包括:收发模块,用于接收来自第一通信设备的重邀请re-invite请求消息,该re-invite请求消息包含用于建立该第一数据通道的第一描述信息,该第一数据通道用于下载数据通道应用,该数据通道应用用于在该第一通信设备与该第二通信设备之间进行除语音通话或视频通话之外的通信,该第一通信设备与该第二通信设备之间的IMS会话已建立完成;处理模块,用于根据该re-invite请求消息触发该第一数据通道的建立。In a fifth aspect, a communication device is provided, comprising: a transceiver module for receiving a re-invite request message from a first communication device, the re-invite request message comprising first description information for establishing the first data channel, the first data channel being used to download a data channel application, the data channel application being used to conduct communications other than voice calls or video calls between the first communication device and the second communication device, and an IMS session between the first communication device and the second communication device has been established; and a processing module for triggering the establishment of the first data channel according to the re-invite request message.
结合第五方面,在第五方面的某些实现方式中,该re-invite请求消息还包含用于建立第二数据通道的第二描述信息,该第二数据通道用于传输该附加通信信息,该第一描述信息用于该第一通信设备建立该第一数据通道,该第二描述信用于该第一通信设备建立该第二数据通道。In combination with the fifth aspect, in certain implementations of the fifth aspect, the re-invite request message also includes second description information for establishing a second data channel, the second data channel is used to transmit the additional communication information, the first description information is used by the first communication device to establish the first data channel, and the second description information is used by the first communication device to establish the second data channel.
结合第五方面,在第五方面的某些实现方式中,该第一数据通道包括该第一通信设备与该数据通道媒体功能网元之间的第一引导数据通道,以及第二通信设备与该数据通道媒体功能网元之间的第二引导数据通道,该第二数据通道包括该第一通信设备与该数据通道媒体功能网元之间的第一应用数据通道,以及第二通信设备与该数据通道媒体功能网元之间的第二应用数据通道;该收发模块,具体用于向数据通道媒体功能网元请求第三描述信息、第四描述信息、第五描述信息以及第六描述信息;其中,该第三描述信息用于该数据通道媒体功能网元建立该第一引导数据通道,该第四描述信息用于该数据通道媒体功能网元建立该第一应用数据通道,该第五描述信息用于该数据通道媒体功能网元建立该第二引导数据通道,该第六描述信息用于该数据通道媒体功能网元建立该第二应用数据通道;该收发模块,具体用于
向该第二通信设备发送请求消息,该请求消息包括该第五描述信息和该第六描述信息;接收来自该第二通信设备的响应消息,该响应消息包括第七描述信息以及第八描述信息,该第七描述信息用于该第二通信设备建立该第二引导数据通道,该第八描述信息用于该第二通信设备建立该第二应用数据通道;该收发模块,具体还用于向该第一通信设备发送该第三描述信息和该第四描述信息,以及向该数据通道媒体功能网元发送该第七描述信息和该第八描述信息。In combination with the fifth aspect, in certain implementations of the fifth aspect, the first data channel includes a first boot data channel between the first communication device and the data channel media function network element, and a second boot data channel between the second communication device and the data channel media function network element, and the second data channel includes a first application data channel between the first communication device and the data channel media function network element, and a second application data channel between the second communication device and the data channel media function network element; the transceiver module is specifically used to request third description information, fourth description information, fifth description information and sixth description information from the data channel media function network element; wherein the third description information is used for the data channel media function network element to establish the first boot data channel, the fourth description information is used for the data channel media function network element to establish the first application data channel, the fifth description information is used for the data channel media function network element to establish the second boot data channel, and the sixth description information is used for the data channel media function network element to establish the second application data channel; the transceiver module is specifically used to A request message is sent to the second communication device, the request message includes the fifth description information and the sixth description information; a response message is received from the second communication device, the response message includes the seventh description information and the eighth description information, the seventh description information is used by the second communication device to establish the second boot data channel, and the eighth description information is used by the second communication device to establish the second application data channel; the transceiver module is further used to send the third description information and the fourth description information to the first communication device, and to send the seventh description information and the eighth description information to the data channel media function network element.
结合第五方面,在第五方面的某些实现方式中,该第一数据通道包括该第一通信设备与该数据通道媒体功能网元之间的第三引导数据通道,以及第二通信设备与该数据通道媒体功能网元之间的第四引导数据通道,该第二数据通道包括该第一通信设备与该第二通信设备之间的第三应用数据通道;该收发模块,具体用于向该数据通道媒体功能网元请求第九描述信息和第十描述信息,该第九描述信息用于该数据通道媒体功能网元建立该第三引导数据通道,该第十描述信息用于该数据通道媒体功能网元建立该第四引导数据通道该收发模块,具体用于向该第二通信设备发送请求消息,该请求消息包括该第二描述信息和该第十描述信息;接收来自该第二通信设备的响应消息,该响应消息包括第十一描述信息和第十二描述信息,该第十一描述信息用于该第二通信设备建立该第四引导数据通道,该第十二描述信息用于该第二通信设备建立该第三应用数据通道;该收发模块,具体还用于向该第一通信设备发送该第九描述信息和该第十二描述信息,以及向该数据通道媒体功能网元发送该第十一描述信息。In combination with the fifth aspect, in certain implementations of the fifth aspect, the first data channel includes a third boot data channel between the first communication device and the data channel media function network element, and a fourth boot data channel between the second communication device and the data channel media function network element, and the second data channel includes a third application data channel between the first communication device and the second communication device; the transceiver module is specifically used to request ninth description information and tenth description information from the data channel media function network element, the ninth description information is used for the data channel media function network element to establish the third boot data channel, and the tenth description information is used for the data channel media function network element. The transceiver module for establishing the fourth guided data channel is specifically used to send a request message to the second communication device, the request message includes the second description information and the tenth description information; receive a response message from the second communication device, the response message includes the eleventh description information and the twelfth description information, the eleventh description information is used by the second communication device to establish the fourth guided data channel, and the twelfth description information is used by the second communication device to establish the third application data channel; the transceiver module is also specifically used to send the ninth description information and the twelfth description information to the first communication device, and send the eleventh description information to the data channel media function network element.
结合第五方面,在第五方面的某些实现方式中,该第一数据通道还用于传输该附加通信信息。In combination with the fifth aspect, in certain implementations of the fifth aspect, the first data channel is also used to transmit the additional communication information.
结合第五方面,在第五方面的某些实现方式中,该收发模块,还用于接收来自该第一通信设备的初始邀请invite请求消息,该初始invite请求消息用于该第一通信设备请求建立该IMS会话;该处理模块,还用于根据该初始invite请求消息,压制触发建立该第一数据通道和/或第二数据通道。In combination with the fifth aspect, in certain implementations of the fifth aspect, the transceiver module is further used to receive an initial invitation invite request message from the first communication device, and the initial invite request message is used by the first communication device to request to establish the IMS session; the processing module is also used to suppress the trigger to establish the first data channel and/or the second data channel according to the initial invite request message.
结合第五方面,在第五方面的某些实现方式中,该IMS会话为通过IMS紧急呼叫建立的会话,该第二通信设备为公共安全应答点。In combination with the fifth aspect, in certain implementations of the fifth aspect, the IMS session is a session established through an IMS emergency call, and the second communication device is a public safety answering point.
第六方面,本申请提供一种处理器,用于执行第一方面或第二方面提供的方法。在执行这些方法的过程中,上述方法中有关发送上述信息和获取/接收上述信息的过程,可以理解为由处理器输出上述信息的过程,以及处理器接收输入的上述信息的过程。在输出上述信息时,处理器将该上述信息输出给收发器,以便由收发器进行发射。该上述信息在由处理器输出之后,还可能需要进行其他的处理,然后再到达收发器。类似的,处理器接收输入的上述信息时,收发器获取/接收该上述信息,并将其输入处理器。更进一步的,在收发器收到该上述信息之后,该上述信息可能需要进行其他的处理,然后再输入处理器。In a sixth aspect, the present application provides a processor for executing the method provided in the first aspect or the second aspect. In the process of executing these methods, the process of sending the above-mentioned information and obtaining/receiving the above-mentioned information in the above-mentioned method can be understood as the process of the processor outputting the above-mentioned information and the process of the processor receiving the above-mentioned information input. When outputting the above-mentioned information, the processor outputs the above-mentioned information to the transceiver so that it can be transmitted by the transceiver. After being output by the processor, the above-mentioned information may also need to be processed in other ways before reaching the transceiver. Similarly, when the processor receives the above-mentioned input information, the transceiver obtains/receives the above-mentioned information and inputs it into the processor. Furthermore, after the transceiver receives the above-mentioned information, the above-mentioned information may need to be processed in other ways before being input into the processor.
基于上述原理,举例来说,前述方法中提及的接收请求消息可以理解为处理器接收输入的信息。Based on the above principle, for example, the receiving request message mentioned in the above method can be understood as the processor receiving input information.
对于处理器所涉及的发射、发送和获取/接收等操作,如果没有特殊说明,或者,如果未与其在相关描述中的实际作用或者内在逻辑相抵触,则均可以更加一般性的理解为处理器输出和接收、输入等操作,而不是直接由射频电路和天线所进行的发射、发送和接收操作。For the operations such as transmission, sending and acquisition/reception involved in the processor, unless otherwise specified, or unless they conflict with their actual functions or internal logic in the relevant descriptions, they can be more generally understood as processor output, reception, input and other operations, rather than transmission, sending and receiving operations performed directly by the RF circuit and antenna.
在实现过程中,上述处理器可以是专门用于执行这些方法的处理器,也可以是执行存储器中的计算机指令来执行这些方法的处理器,例如通用处理器。上述存储器可以为非瞬时性(non-transitory)存储器,例如只读存储器(read only memory,ROM),其可以与处理器集成在同一块芯片上,也可以分别设置在不同的芯片上,本申请实施例对存储器的类型以及存储器与处理器的设置方式不做限定。In the implementation process, the processor may be a processor specifically used to execute these methods, or may be a processor that executes computer instructions in a memory to execute these methods, such as a general-purpose processor. The memory may be a non-transitory memory, such as a read-only memory (ROM), which may be integrated with the processor on the same chip or may be separately arranged on different chips. The embodiment of the present application does not limit the type of memory and the arrangement of the memory and the processor.
第七方面,提供一种计算机可读存储介质,该计算机可读介质存储用于设备执行的程序代码,该程序代码包括用于执行上述第一方面或第二方面提供的方法。In a seventh aspect, a computer-readable storage medium is provided, which stores a program code for execution by a device, wherein the program code includes code for executing the method provided in the first aspect or the second aspect above.
第八方面,提供一种包含指令的计算机程序产品,当该计算机程序产品在计算机上运行时,使得计算机执行上述第一方面或第二方面提供的方法。In an eighth aspect, a computer program product comprising instructions is provided, and when the computer program product is run on a computer, the computer is caused to execute the method provided in the first aspect or the second aspect.
第九方面,提供一种芯片,该芯片包括处理器与通信接口,该处理器通过该通信接口读取存储器上存储的指令,执行上述第一方面或第二方面提供的方法。In a ninth aspect, a chip is provided, which includes a processor and a communication interface. The processor reads instructions stored in a memory through the communication interface to execute the method provided in the first or second aspect.
可选地,作为一种实现方式,该芯片还可以包括存储器,该存储器中存储有指令,该处理器用于执行该存储器上存储的指令,当该指令被执行时,该处理器用于执行上述第一方面或第二方面提供的方法。Optionally, as an implementation method, the chip may also include a memory, in which instructions are stored, and the processor is used to execute the instructions stored in the memory. When the instructions are executed, the processor is used to execute the method provided by the first aspect or the second aspect above.
第十方面,提供了一种通信系统,该通信系统包括用于执行如第一方面所示方法的第一通信设备,以及用于执行如第二方面所示方法的会话控制功能设备。In a tenth aspect, a communication system is provided, which includes a first communication device for executing the method shown in the first aspect, and a session control function device for executing the method shown in the second aspect.
图1是适用于本申请实施例的网络架构的示意图。
FIG. 1 is a schematic diagram of a network architecture applicable to an embodiment of the present application.
图2是适用于本申请实施例的另一种网络架构的示意图。FIG. 2 is a schematic diagram of another network architecture applicable to an embodiment of the present application.
图3是适用于本申请实施例的一种数据通道协议栈示意图。FIG3 is a schematic diagram of a data channel protocol stack applicable to an embodiment of the present application.
图4是本申请实施例提供的一种支持数据通道的IMS基本呼叫的网络架构图。FIG. 4 is a network architecture diagram of an IMS basic call supporting a data channel provided in an embodiment of the present application.
图5示出了本申请实施例提供的一种在IMS基本呼叫流程创建数据通道的示例性流程图。FIG. 5 shows an exemplary flow chart of creating a data channel in an IMS basic call flow provided by an embodiment of the present application.
图6示出了本申请实施例提供的一种IMS紧急呼叫的网络架构图。FIG. 6 shows a network architecture diagram of an IMS emergency call provided in an embodiment of the present application.
图7是本申请实施例提供的一种IMS紧急呼叫的示例性流程图。FIG. 7 is an exemplary flow chart of an IMS emergency call provided in an embodiment of the present application.
图8示出了本申请实施例提供的一种通信方法800的示例性流程图。FIG. 8 shows an exemplary flow chart of a communication method 800 provided in an embodiment of the present application.
图9示出了本申请实施例提供的又一种通信方法900的示例性流程图。FIG. 9 shows an exemplary flow chart of yet another communication method 900 provided in an embodiment of the present application.
图10是适用于本申请实施例的一种网络架构图。FIG. 10 is a network architecture diagram applicable to an embodiment of the present application.
图11示出了本申请实施例提供的另一种通信方法1100的示例性流程图。FIG. 11 shows an exemplary flowchart of another communication method 1100 provided in an embodiment of the present application.
图12示出了本申请实施例提供的又一种通信方法1200的示例性流程图。FIG. 12 shows an exemplary flow chart of yet another communication method 1200 provided in an embodiment of the present application.
图13示出了本申请实施例提供的又一种通信方法1300的示例性流程图。FIG. 13 shows an exemplary flowchart of yet another communication method 1300 provided in an embodiment of the present application.
图14示出了本申请实施例提供的又一种通信方法1400的示例性流程图。FIG. 14 shows an exemplary flowchart of yet another communication method 1400 provided in an embodiment of the present application.
图15示出了本申请实施例提供的又一种通信方法1500的示例性流程图。FIG. 15 shows an exemplary flowchart of yet another communication method 1500 provided in an embodiment of the present application.
图16是适用于本申请实施例的另一种网络架构图。FIG. 16 is another network architecture diagram applicable to an embodiment of the present application.
图17示出了本申请实施例提供的另一种通信方法1700的示例性流程图。FIG. 17 shows an exemplary flowchart of another communication method 1700 provided in an embodiment of the present application.
图18示出了本申请实施例提供的又一种通信方法1800的示例性流程图。FIG. 18 shows an exemplary flowchart of yet another communication method 1800 provided in an embodiment of the present application.
图19示出了本申请实施例提供的又一种通信方法1900的示例性流程图。FIG. 19 shows an exemplary flowchart of yet another communication method 1900 provided in an embodiment of the present application.
图20示出了本申请实施例提供的又一种通信方法2000的示例性流程图。FIG. 20 shows an exemplary flowchart of yet another communication method 2000 provided in an embodiment of the present application.
图21示出了本申请实施例提供的又一种通信方法2100的示例性流程图。FIG. 21 shows an exemplary flowchart of yet another communication method 2100 provided in an embodiment of the present application.
图22是本申请一个实施例提供的通信装置的示意性框图。FIG. 22 is a schematic block diagram of a communication device provided by an embodiment of the present application.
图23是本申请另一个实施例提供的通信装置的示意性框图。FIG23 is a schematic block diagram of a communication device provided in another embodiment of the present application.
图24是本申请又一个实施例提供的通信装置的示意性框图。FIG24 is a schematic block diagram of a communication device provided in yet another embodiment of the present application.
为了使本申请的目的、技术方案和优点更加清楚,下面将结合附图对本申请作进一步地详细描述。方法实施例中的具体操作方法也可以应用于装置实施例或系统实施例中。其中,在本申请的描述中,除非另有说明,“多个”的含义是两个或两个以上。In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings. The specific operation method in the method embodiment can also be applied to the device embodiment or the system embodiment. In the description of the present application, unless otherwise specified, the meaning of "multiple" is two or more.
在本申请的各个实施例中,如果没有特殊说明以及逻辑冲突,不同的实施例之间的术语和/或描述具有一致性、且可以相互引用,不同的实施例中的技术特征根据其内在的逻辑关系可以组合形成新的实施例。In the various embodiments of the present application, unless otherwise specified or provided in a logical conflict, the terms and/or descriptions between the different embodiments are consistent and may be referenced to each other, and the technical features in the different embodiments may be combined to form new embodiments according to their inherent logical relationships.
可以理解的是,在本申请中涉及的各种数字编号仅为描述方便进行的区分,并不用来限制本申请的范围。上述各过程的序号的大小并不意味着执行顺序的先后,各过程的执行顺序应以其功能和内在逻辑确定。It is understood that the various numbers involved in this application are only used for the convenience of description and are not used to limit the scope of this application. The order of execution of each process should be determined by its function and internal logic.
本申请的说明书和权利要求书及上述附图中的术语“第一”、“第二”、“第三”、“第四”以及其他各种术语标号等(如果存在)是用于区别类似的对象,而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换,以便这里描述的实施例能够以除了在这里图示或描述的内容以外的顺序实施。此外,术语“包括”和“具有”以及他们的任何变形,意图在于覆盖不排他的包含,例如,包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元,而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。The terms "first", "second", "third", "fourth" and other various terminology labels (if any) in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.
本申请提供的技术方案可以应用于各种通信系统,例如:第五代(5th generation,5G)通信系统(或称为新无线(new radio,NR)系统)、第四代(4th generation,4G)通信系统(或称为长期演进(long term evolution,LTE)系统)、LTE频分双工(frequency division duplex,FDD)系统、LTE时分双工(time division duplex,TDD)系统等。本申请提供的技术方案还可以应用于未来的通信系统,如第六代(6th generation,6G)移动通信系统。The technical solution provided in this application can be applied to various communication systems, such as: the fifth generation (5th generation, 5G) communication system (or called the new radio (new radio, NR) system), the fourth generation (4th generation, 4G) communication system (or called the long term evolution (long term evolution, LTE) system), LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD) system, etc. The technical solution provided in this application can also be applied to future communication systems, such as the sixth generation (6th generation, 6G) mobile communication system.
下面结合图1举例说明本申请实施例适用的一种通信系统。应理解,本申请描述的通信系统仅是示例,不应对本申请构成任何限定。A communication system applicable to the embodiment of the present application is described below by way of example in conjunction with Figure 1. It should be understood that the communication system described in the present application is only an example and should not constitute any limitation to the present application.
在图1所示的通信系统中,第一通信设备和第二通信设备通过IP多媒体子系统(IP multimedia
subsystem,IMS)网络进行通信。其中,第一通信设备为主叫设备(即发起呼叫的设备),第二通信设备为被叫设备(即被呼叫的设备)。In the communication system shown in FIG. 1 , the first communication device and the second communication device communicate with each other through an IP multimedia subsystem. The first communication device is a calling device (i.e., a device initiating a call), and the second communication device is a called device (i.e., a device being called).
在本申请实施例中,IMS网络可以是多个具有处理语音及多媒体业务的设备的集合,也可以理解为是多个具有处理音视频以及多媒体业务的服务器的集合。IMS网络可以包括一个或多个网络设备,如呼叫会话控制功能(call session control function,CSCF)网元、IMS接入媒体网关(access media gateway,AGW)、数据通道信令功能(data channel signaling function,DCSF)网元、数据通道媒体功能(data channel media function,DCMF)网元、归属用户服务器(home subscriber server,HSS)等。In the embodiment of the present application, the IMS network may be a collection of multiple devices capable of processing voice and multimedia services, and may also be understood as a collection of multiple servers capable of processing audio, video and multimedia services. The IMS network may include one or more network devices, such as a call session control function (CSCF) network element, an IMS access media gateway (AGW), a data channel signaling function (DCSF) network element, a data channel media function (DCMF) network element, a home subscriber server (HSS), etc.
在本申请实施例中,第一通信设备作为主叫设备时,可以是任意具备通话功能的电子设备。示例性地,第一通信设备为用户设备(user equipment,UE),UE可以是任何能够接入网络的设备,还可以称为终端设备(terminal equipment)、终端装置、接入终端、用户单元、用户站、移动站、移动台(mobile station,MS)、移动终端(mobile terminal,MT)、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置等。UE可以是一种向用户提供语音/数据连通性的设备,例如,具有无线连接功能的手持式设备、车载设备等。目前,一些终端的举例可以为:手机(mobile phone)、平板电脑(pad)、带无线收发功能的电脑(如笔记本电脑、掌上电脑等)、移动互联网设备(mobile internet device,MID)、虚拟现实(virtual reality,VR)设备、AR设备、工业控制(industrial control)中的无线终端、无人驾驶(self driving)中的无线终端、远程医疗(remote medical)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端、蜂窝电话、无绳电话、会话启动协议(session initiation protocol,SIP)电话、无线本地环路(wireless local loop,WLL)站、个人数字助理(personal digital assistant,PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备,4G/5G网络中的终端设备或者未来演进的公用陆地移动通信网络(public land mobile network,PLMN)中的终端设备等。In the embodiment of the present application, when the first communication device is used as a calling device, it can be any electronic device with a call function. Exemplarily, the first communication device is a user equipment (UE), and the UE can be any device that can access the network, and can also be called terminal equipment (terminal equipment), terminal device, access terminal, user unit, user station, mobile station, mobile station (MS), mobile terminal (MT), remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc. UE can be a device that provides voice/data connectivity to users, for example, a handheld device with wireless connection function, a vehicle-mounted device, etc. At present, some examples of terminals can be: mobile phones, tablet computers, computers with wireless transceiver functions (such as laptops, PDAs, etc.), mobile Internet devices (mobile internet device, MID), virtual reality (virtual reality, VR) equipment, AR equipment, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical, wireless terminals in smart grid, wireless terminals in transportation safety, wireless terminals in smart city (sm The invention relates to wireless terminals in art city, wireless terminals in smart home, cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDA), handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, terminal devices in 4G/5G networks or terminal devices in future evolved public land mobile communication networks (PLMN), etc.
此外,UE还可以是物联网(Internet of things,IoT)系统中的UE。IoT是未来信息技术发展的重要组成部分,其主要技术特点是将物品通过通信技术与网络连接,从而实现人机互连,物-物互连的智能化网络。IoT技术可以通过例如窄带(narrow band,NB)技术,做到海量连接,深度覆盖,终端省电。In addition, UE can also be a UE in the Internet of Things (IoT) system. IoT is an important part of the future development of information technology. Its main technical feature is to connect objects to the network through communication technology, thereby realizing an intelligent network of human-machine interconnection and object-object interconnection. IoT technology can achieve massive connections, deep coverage, and terminal power saving through narrowband (NB) technology, for example.
此外,UE还可以包括智能打印机、火车探测器等,主要功能包括收集数据(部分终端设备)、接收网络设备的控制信息与下行数据,并发送电磁波,向网络设备传输上行数据。In addition, UE can also include smart printers, train detectors, etc. Its main functions include collecting data (part of the terminal equipment), receiving control information and downlink data from network equipment, and sending electromagnetic waves to transmit uplink data to network equipment.
可选地,UE可以用于充当基站。例如,用户设备可以充当调度实体,其在车联网(vehicle to everything,V2X)或设备到设备(device to device,D2D)等中的用户设备之间提供侧行链路信号。比如,蜂窝电话和汽车利用侧行链路信号彼此通信。蜂窝电话和智能家居设备之间通信,而无需通过基站中继通信信号。Optionally, the UE can be used to act as a base station. For example, the user equipment can act as a scheduling entity that provides sidelink signals between user equipment in vehicle to everything (V2X) or device to device (D2D). For example, a cell phone and a car communicate with each other using sidelink signals. A cell phone and a smart home device communicate with each other without relaying the communication signal through a base station.
可以理解的是,第二通信设备作为被叫设备时,可以是任意具备通话功能的电子设备。示例性地,第二通信设备为用户设备,或者第二通信设备为IMS紧急呼叫场景(即通信设备1向通信设备2发起IMS紧急呼叫(emergency call))下的公共安全应答点(如PSAP),或者是公共安全应答点下的任意具有通话功能的电子设备。It is understandable that when the second communication device acts as a called device, it can be any electronic device with a call function. Exemplarily, the second communication device is a user device, or the second communication device is a public safety answering point (such as PSAP) in an IMS emergency call scenario (i.e., communication device 1 initiates an IMS emergency call (emergency call) to communication device 2), or any electronic device with a call function under a public safety answering point.
上述应用于本申请实施例的网络架构仅是一种示例,适用本申请实施例的网络架构并不局限于此,任何能够实现上述各个网元的功能的网络架构都适用于本申请实施例,即本申请实施例描述的网络架构以及业务场景是为了更加清楚的说明本申请实施例的技术方案,并不构成对于本申请实施例提供的技术方案的限定,本领域普通技术人员可知,随着网络架构的演变和新业务场景的出现,本申请实施例提供的技术方案对于类似的技术问题,同样适用。The above-mentioned network architecture applied to the embodiment of the present application is only an example, and the network architecture applicable to the embodiment of the present application is not limited to this. Any network architecture that can realize the functions of the above-mentioned network elements is applicable to the embodiment of the present application, that is, the network architecture and business scenarios described in the embodiment of the present application are for the purpose of more clearly illustrating the technical solution of the embodiment of the present application, and do not constitute a limitation on the technical solution provided in the embodiment of the present application. Ordinary technicians in this field can know that with the evolution of network architecture and the emergence of new business scenarios, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems.
还可以理解的是,上述网络架构中列举的网元或设备仅为示例性说明,适用于本申请的网络架构还可以包括其他网元或设备,本申请对此不作限定。It can also be understood that the network elements or devices listed in the above network architecture are only exemplary, and the network architecture applicable to the present application may also include other network elements or devices, which is not limited in the present application.
还可以理解的是,上述网元或设备的命名仅为便于区分不同的功能而定义,不应对本申请构成任何限定。本申请并不排除在4G网络、5G网络以及未来其它的网络中采用其他命名的可能。例如,在6G网络中,上述各个网元中的部分或全部可以沿用4G/5G中的术语,也可能采用其他名称等。It is also understandable that the naming of the above network elements or devices is only defined for the convenience of distinguishing different functions and should not constitute any limitation to this application. This application does not exclude the possibility of using other names in 4G networks, 5G networks and other future networks. For example, in a 6G network, some or all of the above network elements may use the terms in 4G/5G, or may use other names.
在本申请实施例中的通信设备包括硬件层、运行在硬件层之上的操作系统层,以及运行在操作系统层上的应用层。该硬件层包括中央处理器(central processing unit,CPU)、内存管理单元(memory management unit,MMU)和内存(也称为主存)等硬件。该操作系统可以是任意一种或多种通过进程
(Process)实现业务处理的计算机操作系统,例如,Linux操作系统、Unix操作系统、Android操作系统、iOS操作系统或windows操作系统等。该应用层包含浏览器、通讯录、文字处理软件、即时通信软件等应用。并且,本申请实施例并未对本申请实施例提供的方法的执行主体的具体结构特别限定,只要能够通过运行记录有本申请实施例的提供的方法的代码的程序,以根据本申请实施例提供的方法进行通信即可,例如,本申请实施例提供的方法的执行主体可以是终端设备或网络设备,或者,是终端设备或网络设备中能够调用程序并执行程序的功能模块。The communication device in the embodiment of the present application includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. The hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and a memory (also called main memory). The operating system can be any one or more of the following: (Process) A computer operating system that implements business processing, such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a Windows operating system. The application layer includes applications such as browsers, address books, word processing software, and instant messaging software. In addition, the embodiments of the present application do not specifically limit the specific structure of the execution subject of the method provided in the embodiments of the present application. As long as it is possible to communicate according to the method provided in the embodiments of the present application by running a program that records the code of the method provided in the embodiments of the present application, for example, the execution subject of the method provided in the embodiments of the present application may be a terminal device or a network device, or a functional module in a terminal device or a network device that can call and execute a program.
此外,本申请实施例的各个方面或特征可以实现成方法、装置或使用标准编程和/或工程技术的制品。本申请中使用的术语“制品”涵盖可从任何计算机可读器件、载体或介质访问的计算机程序。例如,计算机可读介质可以包括,但不限于:磁存储器件(例如,硬盘、软盘或磁带等),光盘(例如,压缩盘(compact disc,CD)、数字通用盘(digital versatile disc,DVD)等),智能卡和闪存器件(例如,可擦写可编程只读存储器(erasable programmable read-only memory,EPROM)、卡、棒或钥匙驱动器等)。另外,本文描述的各种存储介质可代表用于存储信息的一个或多个设备和/或其它机器可读介质。术语“机器可读介质”可包括但不限于,无线信道和能够存储、包含和/或承载指令和/或数据的各种其它介质。In addition, various aspects or features of the embodiments of the present application can be implemented as methods, devices or products using standard programming and/or engineering techniques. The term "product" used in this application covers computer programs that can be accessed from any computer-readable device, carrier or medium. For example, computer-readable media may include, but are not limited to: magnetic storage devices (e.g., hard disks, floppy disks or tapes, etc.), optical disks (e.g., compact discs (CDs), digital versatile discs (DVDs), etc.), smart cards and flash memory devices (e.g., erasable programmable read-only memory (EPROM), cards, sticks or key drives, etc.). In addition, the various storage media described herein may represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing and/or carrying instructions and/or data.
为了便于理解本申请实施例的技术方案,在介绍本申请实施例的方案之前,首先介绍本申请实施例可能涉及到的一些术语或概念。In order to facilitate understanding of the technical solutions of the embodiments of the present application, before introducing the solutions of the embodiments of the present application, some terms or concepts that may be involved in the embodiments of the present application are first introduced.
一、IMS会话1. IMS Session
本申请实施例所述的IMS会话,是指通信设备以主叫身份或者被叫身份参与,经IMS中的网元接续与其他一到多个通信设备之间进行的语音通话或视频通话的业务。IMS会话也可以称作IMS通话,或IMS呼叫等。The IMS session described in the embodiment of the present application refers to a service in which a communication device participates as a caller or a called party and conducts a voice call or a video call with one or more other communication devices through a network element in the IMS. An IMS session may also be referred to as an IMS call, or an IMS call, etc.
IMS会话可以涵盖从开始拨号到通话结束之间的整个过程,也可以涵盖从开始拨号到通话结束之间的部分过程,如从参与IMS会话的各方进入通话状态到通话结束之间的过程。An IMS session may cover the entire process from the start of dialing to the end of a call, or may cover a portion of the process from the start of dialing to the end of a call, such as the process from when the parties involved in the IMS session enter a call state to when the call ends.
IMS会话可以是一对一的形式,也可以是一对多(如会议)的形式;本申请实施例以一对一的形式为例,但相关方案均可以用于一对多的形式。An IMS session can be a one-to-one session or a one-to-many session (such as a conference). The embodiment of the present application takes the one-to-one session as an example, but related solutions can also be used in the one-to-many session.
二、语音通话和视频通话2. Voice calls and video calls
本申请实施例所述的语音通话指的是IMS会话中各参与方用户设备之间通过实时传输音频内容以实现语音交互目的通话;本申请实施例所述的视频通话指的是IMS会话中各参与方用户设备之间通过实时传输音频内容和/或视频内容以实现视频交互目的的通话。语音通话和视频通话可以统称为音视频通话。The voice call described in the embodiment of the present application refers to a call between user devices of each participant in an IMS session through real-time transmission of audio content to achieve the purpose of voice interaction; the video call described in the embodiment of the present application refers to a call between user devices of each participant in an IMS session through real-time transmission of audio content and/or video content to achieve the purpose of video interaction. Voice calls and video calls can be collectively referred to as audio and video calls.
三、附加通信信息3. Additional Communication Information
本申请实施例所述的附加通信信息用于在IMS会话的各参与方设备之间进行除语音通话或视频通话之外的通信,或者说,附加通信信息为除音视频交互内容之外,用于在IMS通话业务的各参与方设备之间进行通信的信息。The additional communication information described in the embodiment of the present application is used for communication between the devices of the various participants in the IMS session other than voice calls or video calls. In other words, the additional communication information is information used for communication between the devices of the various participants in the IMS call service other than audio and video interaction content.
作为一种示例,附加通信信息可以包括以下至少一项:用户设备的摄像头所拍摄的内容,点赞(thumb up)所生成的信息,发送红包所生成的信息,桌面共享内容,用户在屏幕上所画的标记,用户输入的文本消息,用户输入的图片信息,地理位置信息或视频文件中的视频内容等。这些信息可能由主叫方终端设备或被叫方终端设备中的任何一个设备生产或消费,也可能是通过与主叫方终端设备或被叫方终端设备相连接的设备生产或消费。As an example, the additional communication information may include at least one of the following: content captured by a camera of a user device, information generated by a thumb up, information generated by sending a red envelope, desktop sharing content, marks drawn by a user on the screen, text messages input by a user, picture information input by a user, geographic location information, or video content in a video file, etc. Such information may be produced or consumed by any one of the calling party terminal device or the called party terminal device, or may be produced or consumed by a device connected to the calling party terminal device or the called party terminal device.
本申请实施例中,附加通信信息可以由IMS会话的参与方终端设备上的数据通道应用通过数据通道传输(发送或接收),并进行相应的处理(呈现、控制等)。In the embodiment of the present application, the additional communication information can be transmitted (sent or received) through the data channel by the data channel application on the terminal device of the participant of the IMS session, and processed accordingly (presented, controlled, etc.).
四、数据通道4. Data Channel
本申请实施例中的数据通道,也被称为IMS数据通道(IMS data channel),即IMS中的数据通道,可以用于基于流控制传输协议(stream control transmission protocol,SCTP)传输数据;也就是说,数据通道是一种基于SCTP传输数据的逻辑通道或数据连接。The data channel in the embodiment of the present application is also referred to as an IMS data channel (IMS data channel), that is, the data channel in IMS, which can be used to transmit data based on the stream control transmission protocol (SCTP); that is, the data channel is a logical channel or data connection based on SCTP to transmit data.
示例性地,DC可以为用户提供除音视频通话之外的更加丰富的实时交互服务。例如,处于同一个IMS会话业务的终端设备(如图2中的UE 1和UE 2)通过IMS的SIP/会话描述协议(session description protocol,SDP)媒体协商流程,确定双方终端设备传递数据使用的IP地址和端口、建立数据报传输层安全(datagram transport layer security,DTLS)偶联和流控制传输协议(stream control transmission protocol,SCTP)偶联所需的关键信息,以及数据通道对应的描述信息,从而在IMS会话中建立一条或多条与音频(Speech)、视频(Video)并行传输的数据通道(如图2或图3所示的数据通道,其中图3示出了一种
基于SCTP/DTLS/用户数据报协议(user datagram protocol,UDP)/IP的数据通道协议栈示意图)。UE 1和UE 2可以通过数据通道从网络侧DCSF下载各种应用(即DC App),并在音视频通话前、通话中或者通话后运行这些应用,通过在数据通道中传输这些应用的各种类型的应用数据,从而使得UE 1和UE 2之间可以进行除语音通话或视频通话之外的通信,例如屏幕共享(screen sharing)、实时翻译(simultaneous translation)、位置共享、叠加AR特效,甚至是听觉、视觉、触觉等同步的沉浸式交互,以提升用户体验。Exemplarily, DC can provide users with richer real-time interactive services in addition to audio and video calls. For example, terminal devices in the same IMS session service (such as UE 1 and UE 2 in Figure 2) determine the IP addresses and ports used by both terminal devices to transmit data, establish key information required for datagram transport layer security (DTLS) coupling and stream control transmission protocol (SCTP) coupling, and description information corresponding to the data channel through the SIP/session description protocol (SDP) media negotiation process of IMS, thereby establishing one or more data channels for parallel transmission with audio (Speech) and video (Video) in the IMS session (such as the data channels shown in Figure 2 or Figure 3, where Figure 3 shows a method of transmitting data in parallel with audio (Speech) and video (Video)). Diagram of data channel protocol stack based on SCTP/DTLS/user datagram protocol (UDP)/IP). UE 1 and UE 2 can download various applications (i.e., DC App) from the network-side DCSF through the data channel, and run these applications before, during, or after the audio or video call. By transmitting various types of application data of these applications in the data channel, UE 1 and UE 2 can communicate with each other in addition to voice or video calls, such as screen sharing, simultaneous translation, location sharing, superimposed AR special effects, and even synchronized immersive interactions such as hearing, vision, and touch, so as to enhance the user experience.
根据用途的不同,可以将数据通道划分为两种类型:引导数据通道(bootstrap data channel,BDC)和应用数据通道(application data channel,ADC)。Depending on their uses, data channels can be divided into two types: bootstrap data channel (BDC) and application data channel (ADC).
其中,BDC用于终端设备从DCSF获取DC App。Among them, BDC is used by terminal devices to obtain DC App from DCSF.
支持数据通道能力的终端设备可以与呼叫始发网络的DCSF和/或呼叫终结网络的DCSF建立BDC。具体方式取决于各网络是否支持数据通道能力,以及通话双方终端设备在各自网络的业务签约情况。Terminal equipment that supports data channel capabilities can establish BDC with the DCSF of the call origination network and/or the DCSF of the call termination network. The specific method depends on whether each network supports data channel capabilities and the service contract status of the terminal equipment of both parties in their respective networks.
另外,BDC只能传递采用超文本传送协议(hypertext transfer protocol,HTTP)的数据,BDC的stream ID取值小于1000。In addition, BDC can only transmit data using the hypertext transfer protocol (HTTP), and the stream ID value of BDC is less than 1000.
ADC用于传送通信双方的运行的DC App产生的交互数据。在P2P场景下,ADC在通话双方终端设备之间建立,此时ADC用于传送通信双方的终端设备上运行的DC App产生的交互数据。ADC is used to transmit the interactive data generated by the DC App running on both communicating parties. In the P2P scenario, ADC is established between the terminal devices of the two communicating parties. At this time, ADC is used to transmit the interactive data generated by the DC App running on the terminal devices of the two communicating parties.
另外,ADC可以传递采用任何协议的数据,ADC的stream ID取值大于或等于1000。In addition, ADC can transmit data using any protocol, and the ADC stream ID value is greater than or equal to 1000.
图4示出了适用于本申请实施例的一种支持数据通道的IMS会话网络架构图。下面对图4所示的网络架构中所涉及的部分网元或设备进行简单的介绍。Fig. 4 shows an IMS session network architecture diagram applicable to an embodiment of the present application that supports data channels. The following briefly introduces some network elements or devices involved in the network architecture shown in Fig. 4.
1、呼叫会话控制功能(call session control function,CSCF)网元:CSCF是IMS内部的功能实体,是整个IMS的核心。主要负责处理多媒体呼叫会话过程中的信令控制。它管理IMS的用户鉴权、IMS承载面服务质量(quality of service,QoS)、与其它网元配合进行会话初始协议(session initiation protocol,SIP)会话的控制,以及业务协商和资源分配等。为了叙述方便,将本申请中的CSCF网元称为“CSCF”。1. Call session control function (CSCF) network element: CSCF is a functional entity within IMS and is the core of the entire IMS. It is mainly responsible for processing signaling control during multimedia call sessions. It manages IMS user authentication, IMS bearer quality of service (QoS), cooperates with other network elements to control session initiation protocol (SIP) sessions, as well as service negotiation and resource allocation. For the sake of convenience, the CSCF network element in this application is referred to as "CSCF".
其中,CSCF可以与终端设备通信,并且,CSCF可以与网关设备通信。例如,该CSCF可以选择与终端设备通信的网关设备,并且,该CSCF可以为终端设备和网关设备分配路由信息,例如,IP地址或端口。The CSCF can communicate with the terminal device, and the CSCF can communicate with the gateway device. For example, the CSCF can select a gateway device to communicate with the terminal device, and the CSCF can allocate routing information, such as an IP address or port, to the terminal device and the gateway device.
作为示例而非限定,CSCF根据功能分为代理CSCF(proxy CSCF,P-CSCF),查询CSCF(interrogating CSCF,I-CSCF),服务CSCF(serving CSCF,S-CSCF)、等。As an example and not limitation, CSCF is divided into proxy CSCF (P-CSCF), interrogating CSCF (I-CSCF), serving CSCF (S-CSCF), etc. according to its function.
其中,P-CSCF是用户接入IMS网络的入口节点,主要负责IMS用户与归属网络之间SIP信令的转发。I-CSCF是IMS用户归属网络的统一入口点,负责分配或者查询为用户服务的S-CSCF。S-CSCF是IMS用户归属网络的统一入口点,负责分配或者查询为用户服务的S-CSCF。Among them, P-CSCF is the entry point for users to access the IMS network, and is mainly responsible for forwarding SIP signaling between IMS users and their home networks. I-CSCF is the unified entry point for IMS users' home networks, and is responsible for allocating or querying S-CSCFs that serve users. S-CSCF is the unified entry point for IMS users' home networks, and is responsible for allocating or querying S-CSCFs that serve users.
可以理解的是,上述P-CSCF、S-CSCF、I-CSCF可以独立配置于不同实体,也可以集成于同一实体,本申请不作限定。It can be understood that the above-mentioned P-CSCF, S-CSCF, and I-CSCF can be independently configured in different entities or integrated in the same entity, and this application does not limit this.
2、IMS-接入媒体网关(access media gateway,AGW):IMS-AGW可以提供IMS网络接入网关和媒体网关功能。2. IMS-access media gateway (AGW): IMS-AGW can provide IMS network access gateway and media gateway functions.
可以理解的是,CSCF和IMS AGW可以统称为IMS core。本申请对IMS core内的网元之间的信令交互方式不作限定。It is understandable that CSCF and IMS AGW can be collectively referred to as IMS core. This application does not limit the signaling interaction method between network elements in the IMS core.
3、数据通道信令功能(data channel signaling function,DCSF)网元:DCSF为数据通道服务器(data channel server,DCS)中的部分逻辑功能实体,DCSF主要用于提供数据通道信令控制功能。3. Data channel signaling function (DCSF) network element: DCSF is a part of the logical functional entity in the data channel server (DCS). DCSF is mainly used to provide data channel signaling control function.
4、数据通道媒体功能(data channel media function,DCMF)网元:DCMF也是DCS中的部分逻辑功能实体,DCMF主要用于提供数据通道媒体资源管理功能,。4. Data channel media function (DCMF) network element: DCMF is also a part of the logical functional entity in DCS. DCMF is mainly used to provide data channel media resource management functions.
5、多媒体电话应用服务器(MultiMedia Telephony application server,MMTel AS):MMTel AS是IMS系统中位于上层的应用层设备,提供基本业务和补充业务,例如多媒体会议、融合通讯、短信网关、标准话务台等业务。IMS网络是一个基于IP承载并向用户提供各项多媒体服务的开放系统,MMTel AS与CSCF之间通过进行交互,进而实现各种网络业务的触发和执行。并且,MMTel AS支持IMS会话的DC交互,即MMTel AS可以为终端设备建立数据通道。MMTel AS可以称作会话控制功能设备,用于控制数据通道的建立流程。5. Multimedia Telephony application server (MMTel AS): MMTel AS is an application layer device located at the upper layer of the IMS system, providing basic and supplementary services, such as multimedia conferencing, converged communications, SMS gateways, standard switchboards, and other services. The IMS network is an open system based on IP bearer that provides users with various multimedia services. MMTel AS interacts with CSCF to trigger and execute various network services. In addition, MMTel AS supports DC interaction of IMS sessions, that is, MMTel AS can establish data channels for terminal devices. MMTel AS can be called a session control function device, which is used to control the establishment process of data channels.
五、数据通道应用(data channel application,DC App)5. Data channel application (DC App)
本申请实施例所述的数据通道应用用于通过同一个IMS通话业务中的多个终端设备之间的数据通道
传输附加通信信息。作为一种示例,数据通道应用是包含超文本标记语言(hypertext markup language,HTML)、JavaScript脚本以及图片、层叠样式表(cascading style sheets,CSS)的网络(Web)内容,描述了图形化的用户界面(user interface,UI),并能够实现交互式的业务逻辑。The data channel application described in the embodiment of the present application is used to pass through the data channel between multiple terminal devices in the same IMS call service Transmit additional communication information. As an example, the data channel application is a web content that includes hypertext markup language (HTML), JavaScript scripts, images, and cascading style sheets (CSS), describes a graphical user interface (UI), and can implement interactive business logic.
数据通道应用通常由终端设备上的通话应用从网络侧下载,并在IMS通话持续期间运行,且无需安装和卸载。可以理解的是,数据通道应用可以以Web页面的形式存在,也可以以小程序/快应用/轻应用等形式存在,本申请对此不作限定。The data channel application is usually downloaded from the network side by the call application on the terminal device and runs during the IMS call without installation and uninstallation. It is understandable that the data channel application can exist in the form of a web page, or in the form of a mini program/quick application/light application, etc., and this application does not limit this.
示例性地,本申请实施例所涉及的数据通道应用可以是4G/5G网络中的DC App。DC App可以在IMS通话建立前和通话建立后传递文本、图片、位置、文件等各种数据,实现通话双方的除语音通话或视频通话之外的通信,能够极大地增强通话双方的体验。Exemplarily, the data channel application involved in the embodiments of the present application may be a DC App in a 4G/5G network. The DC App can transmit various data such as text, pictures, locations, files, etc. before and after an IMS call is established, and realize communication between the two parties in addition to voice calls or video calls, which can greatly enhance the experience of both parties.
终端设备可以通过BDC以HTTP流程从DCSF获取DC App,并可以随时自动或交互式地更新,然后通过该DC App与对端终端设备进行除语音通话或视频通话之外的通信。例如,第一终端设备和第二终端设备处于同一个IMS通话业务中。假设第一终端设备在与第二终端设备的通话过程,希望向第二终端设备共享自己的手机屏幕,来指导B进行手机设置,则第一终端设备和第二终端设备可以先分别获取用于屏幕共享的DC App,然后分别运行该DC App与对端UE进行除语音通话或视频通话之外的通信。The terminal device can obtain the DC App from the DCSF through the HTTP process via BDC, and can automatically or interactively update it at any time, and then communicate with the terminal device of the other end through the DC App except for voice calls or video calls. For example, the first terminal device and the second terminal device are in the same IMS call service. Assuming that the first terminal device wants to share its mobile phone screen with the second terminal device during the call with the second terminal device to guide B to set up the mobile phone, the first terminal device and the second terminal device can first obtain the DC App for screen sharing respectively, and then run the DC App respectively to communicate with the UE of the other end except for voice calls or video calls.
六、描述信息以及描述信息协商6. Description Information and Description Information Negotiation
本申请实施例所涉及的描述信息,指的是用于进行IMS通话的媒体资源相关的信息,如IP地址、端口信息、TLS ID、证书、DC的流标识(stream ID)等。因此,本申请实施例中的描述信息也可以称为媒体信息、媒体描述信息或媒体资源信息。The description information involved in the embodiment of the present application refers to information related to the media resources used for IMS calls, such as IP address, port information, TLS ID, certificate, DC stream ID, etc. Therefore, the description information in the embodiment of the present application can also be called media information, media description information or media resource information.
进行IMS通话的双方UE(如图2中的UE 1和UE 2)可以通过描述信息协商,获取用于建立UE 1和UE 2之间的数据通道的描述信息,这里的描述信息协商指的是UE 1和UE 2协商对方进行IMS通话所使用的媒体描述(media description)信息,即UE 1和UE 2要互相知道对方收发媒体所使用的描述信息。The two UEs conducting an IMS call (such as UE 1 and UE 2 in Figure 2) can obtain the description information used to establish a data channel between UE 1 and UE 2 through description information negotiation. The description information negotiation here refers to UE 1 and UE 2 negotiating the media description information used by each other to conduct the IMS call, that is, UE 1 and UE 2 need to know the description information used by each other to send and receive media.
图5示出了本申请实施例提供的一种通过媒体协商创建数据通道的示例性流程。下面结合图5中的各个步骤对该流程进行示例性说明。Fig. 5 shows an exemplary process of creating a data channel through media negotiation provided by an embodiment of the present application. The process is exemplarily described below in conjunction with each step in Fig. 5 .
S501,UE向P-CSCF发送初始invite请求消息,该初始invite请求消息包括SDP offer#1和DC能力指示信息。该SDP offer#1为UE用于建立BDC的描述信息,该DC能力指示信息用于指示UE支持DC能力。S501, UE sends an initial invite request message to P-CSCF, the initial invite request message includes SDP offer#1 and DC capability indication information. The SDP offer#1 is the description information used by the UE to establish BDC, and the DC capability indication information is used to indicate that the UE supports DC capability.
S502,P-CSCF向S-CSCF发送初始invite请求消息。S502: The P-CSCF sends an initial invite request message to the S-CSCF.
S503,S-CSCF向MMTel AS发送初始invite请求消息。S503, S-CSCF sends an initial invite request message to MMTel AS.
S504,MMTel AS确定UE支持DC,触发BDC创建流程。S504, MMTel AS determines that UE supports DC and triggers the BDC creation process.
S505,MMTel AS向DCSF发送DC活动通知(DC event notify)消息,以上报DC呼叫事件给DCSF。S505, MMTel AS sends a DC event notify message to DCSF to report the DC call event to DCSF.
S506,DCSF向发送DC控制请求(DC control request)消息,以申请BDC通道资源。S506, DCSF sends a DC control request (DC control request) message to apply for BDC channel resources.
S507,MMTel AS向DCMF发送SDP offer#1,以申请BDC资源。S507, MMTel AS sends SDP offer#1 to DCMF to apply for BDC resources.
S508,DCMF向MMTel AS发送SDP answer#1和SDP offer#2,其中,SDP answer#1为DCMF确定的用于创建UE和DCMF之间的BDC的描述信息,SDP offer#2为DCMF提供的用于创建DCMF与被叫侧设备之间的BDC的描述信息。S508, DCMF sends SDP answer#1 and SDP offer#2 to MMTel AS, where SDP answer#1 is the description information determined by DCMF for creating BDC between UE and DCMF, and SDP offer#2 is the description information provided by DCMF for creating BDC between DCMF and the called side device.
S509,MMTel AS向S-CSCF发送初始invite请求消息,该初始invite请求消息包括SDP offer#2。S509, MMTel AS sends an initial invite request message to S-CSCF, and the initial invite request message includes SDP offer#2.
S510,S-CSCF向被叫侧IMS发送初始invite请求消息,该初始invite请求消息包括SDP offer#2。S510, S-CSCF sends an initial invite request message to the IMS on the called side, and the initial invite request message includes SDP offer#2.
S511,被叫侧IMS通过S-CSCF向MMTel AS发送18X响应消息,该18X响应消息包括SDP answer#2,该SDP answer#2为被叫侧设备确定的用于建立DCMF和被叫侧设备之间的BDC的描述信息。S511, the called side IMS sends an 18X response message to the MMTel AS through the S-CSCF. The 18X response message includes SDP answer#2, which is the description information determined by the called side device for establishing the BDC between the DCMF and the called side device.
S512,MMTel AS向DCMF发送SDP answer#2。S512, MMTel AS sends SDP answer#2 to DCMF.
S513,MMTel AS向S-CSCF发送18X响应消息,该18X响应消息包括SDP answer#1。S513, MMTel AS sends an 18X response message to S-CSCF, and the 18X response message includes SDP answer#1.
S514,S-CSCF与P-CSCF创建DC QoS流程。S514, S-CSCF and P-CSCF create DC QoS process.
S515,P-CSCF向UE发送18X响应消息。S515, the P-CSCF sends an 18X response message to the UE.
通过上述流程,UE与DCMF之间协商了用于建立UE与DCMF之间的BDC的描述信息,DCMF与被叫侧设备之间协商了用于建立DCMF与被叫侧设备之间的BDC的描述信息。Through the above process, the UE and the DCMF negotiate the description information for establishing the BDC between the UE and the DCMF, and the DCMF and the called side device negotiate the description information for establishing the BDC between the DCMF and the called side device.
UE与被叫侧设备之间的呼叫建立完成之后,被叫侧IMS通过各网元向UE发送200OK响应消息,具体如S516-S519所示,这里不再赘述。After the call between the UE and the called device is established, the called IMS sends a 200 OK response message to the UE through each network element, as shown in S516-S519, which will not be repeated here.
进一步地,UE触发ADC创建流程:
Furthermore, the UE triggers the ADC creation process:
S520,UE向P-CSCF发送re-invite请求消息,该re-invite请求消息包括SDP offer#3。该SDP offer#3为UE用于建立ADC的描述信息,该DC能力指示信息用于指示UE支持DC能力。S520, the UE sends a re-invite request message to the P-CSCF, where the re-invite request message includes SDP offer#3. The SDP offer#3 is the description information used by the UE to establish the ADC, and the DC capability indication information is used to indicate that the UE supports the DC capability.
S521,P-CSCF向S-CSCF发送re-invite请求消息。S521, the P-CSCF sends a re-invite request message to the S-CSCF.
S522,S-CSCF向MMTel AS发送re-invite请求消息。S522, S-CSCF sends a re-invite request message to MMTel AS.
S523,MMTel AS确定UE支持DC,触发ADC创建流程。S523, MMTel AS determines that UE supports DC and triggers the ADC creation process.
S524,MMTel AS向DCSF发送DC活动通知(DC event notify)消息,以上报DC呼叫事件给DCSF。S524, MMTel AS sends a DC event notify message to DCSF to report the DC call event to DCSF.
S525,DCSF向发送DC控制请求(DC control request)消息,以申请ADC通道资源。S525, DCSF sends a DC control request (DC control request) message to apply for ADC channel resources.
S526,MMTel AS向DCMF发送SDP offer#3,以申请ADC资源。S526, MMTel AS sends SDP offer#3 to DCMF to apply for ADC resources.
S527,DCMF向MMTel AS发送SDP answer#3和SDP offer#4,其中,SDP answer#3为DCMF确定的用于创建UE和DCMF之间的ADC的描述信息,SDP offer#4为DCMF提供的用于创建DCMF与被叫侧设备之间的ADC的描述信息。S527, DCMF sends SDP answer#3 and SDP offer#4 to MMTel AS, where SDP answer#3 is the description information determined by DCMF for creating ADC between UE and DCMF, and SDP offer#4 is the description information provided by DCMF for creating ADC between DCMF and the called side device.
S528,MMTel AS向S-CSCF发送re-invite请求消息,该re-invite请求消息包括SDP offer#4。S528, MMTel AS sends a re-invite request message to S-CSCF, and the re-invite request message includes SDP offer#4.
S529,S-CSCF向被叫侧IMS发送re-invite请求消息,该re-invite请求消息包括SDP offer#4。S529, S-CSCF sends a re-invite request message to the IMS on the called side, and the re-invite request message includes SDP offer#4.
S530,被叫侧IMS通过S-CSCF向MMTel AS发送200响应消息,该200响应消息包括SDP answer#4,该SDP answer#4为被叫侧设备确定的用于建立DCMF和被叫侧设备之间的ADC的描述信息。S530, the called side IMS sends a 200 response message to the MMTel AS through the S-CSCF. The 200 response message includes SDP answer#4, which is the description information determined by the called side device for establishing the ADC between the DCMF and the called side device.
S531,MMTel AS向DCMF发送SDP answer#4。S531, MMTel AS sends SDP answer#4 to DCMF.
S532,MMTel AS向S-CSCF发送200响应消息,该200响应消息包括SDP answer#3。S532, MMTel AS sends a 200 response message to S-CSCF, and the 200 response message includes SDP answer#3.
S533,S-CSCF与P-CSCF创建DC QoS流程。S533, S-CSCF and P-CSCF create DC QoS process.
S534,P-CSCF向UE发送200响应消息。S534, the P-CSCF sends a 200 response message to the UE.
通过上述流程,UE与DCMF之间协商了用于建立UE与DCMF之间的ADC的描述信息,DCMF与被叫侧设备之间协商了用于建立DCMF与被叫侧设备之间的ADC的描述信息。Through the above process, the UE and the DCMF negotiate the description information for establishing the ADC between the UE and the DCMF, and the DCMF and the called side device negotiate the description information for establishing the ADC between the DCMF and the called side device.
七、IMS紧急呼叫(Emergency Call)7. IMS Emergency Call
根据电信管理规定,电信网络需要提供IMS紧急呼叫业务,当用户拨打紧急呼叫号码、或使用终端设备中存储的缺省紧急呼叫号码(如110,119、112等),或使用紧急呼叫标识(如SOS)发起IMS紧急呼叫,网络将IMS紧急呼叫接续至当地的公众安全应答中心PSAP,如火警呼叫中心、医疗救护及救援中心等。According to telecommunications management regulations, telecommunications networks are required to provide IMS emergency call services. When a user dials an emergency call number, or uses the default emergency call number stored in the terminal device (such as 110, 119, 112, etc.), or uses an emergency call identifier (such as SOS) to initiate an IMS emergency call, the network will connect the IMS emergency call to the local public safety answering center PSAP, such as a fire alarm call center, medical rescue and rescue center, etc.
图6示出了适用于本申请实施例的一种IMS紧急呼叫的网络架构图。在如6所示的网络架构中,E-CSCF/EATF与P-CSCF连接,为UE的IMS紧急呼叫选择合适的PSAP。E-CSCF支持IMS会话的DC交互,即MMTel AS可以为终端设备建立数据通道。E-CSCF可以称作会话控制功能设备,用于控制数据通道的建立流程。FIG6 shows a network architecture diagram of an IMS emergency call applicable to an embodiment of the present application. In the network architecture shown in FIG6, the E-CSCF/EATF is connected to the P-CSCF to select a suitable PSAP for the UE's IMS emergency call. The E-CSCF supports DC interaction of the IMS session, that is, the MMTel AS can establish a data channel for the terminal device. The E-CSCF can be called a session control function device, which is used to control the establishment process of the data channel.
图7示出了适用于图6所示网络本申请实施例提供的一种IMS紧急呼救的示例性流程图。下面结合图7中的各个步骤对该流程进行示例性说明。Fig. 7 shows an exemplary flow chart of an IMS emergency call provided by the embodiment of the present application applicable to the network shown in Fig. 6. The flow is exemplarily described below in conjunction with each step in Fig. 7.
S701,UE向P-CSCF发送invite请求消息,以发起IMS紧急呼叫请求。S701, UE sends an invite request message to P-CSCF to initiate an IMS emergency call request.
S702,P-CSCF向UE发送100Trying消息。该100Trying消息为临时响应消息,用于响应于来自UE的invite请求消息。S702, the P-CSCF sends a 100Trying message to the UE. The 100Trying message is a temporary response message used to respond to the invite request message from the UE.
S703,P-CSCF触发IMS紧急呼叫专有承载建立流程。具体过程本申请不作限定。S703, P-CSCF triggers the IMS emergency call dedicated bearer establishment process. The specific process is not limited in this application.
S704,P-CSCF向E-CSCF/EATF发送invite请求消息。S704, the P-CSCF sends an invite request message to the E-CSCF/EATF.
S705,E-CSCF/EATF向P-CSCF返回100Trying消息。S705, E-CSCF/EATF returns a 100Trying message to P-CSCF.
S706,E-CSCF/EATF向PSAP发送invite请求消息。S706, E-CSCF/EATF sends an invite request message to PSAP.
示例性地,E-CSCF/EATF接收来自P-CSCF的invite请求消息之后,根据用户当前位置,选择合适的PSAP,然后向该PSAP发送invite请求消息。Exemplarily, after receiving the invite request message from the P-CSCF, the E-CSCF/EATF selects a suitable PSAP according to the current location of the user, and then sends the invite request message to the PSAP.
S707,PSAP向E-CSCF/EATF发送100Trying消息。S707, PSAP sends a 100Trying message to E-CSCF/EATF.
S708,PSAP向E-CSCF/EATF发送180Ringing消息。S708, PSAP sends a 180 Ringing message to E-CSCF/EATF.
示例性地,响应于接收到的invite请求消息,PSAP在振铃之后,向E-CSCF/EATF发送180Ringing消息,用于向主叫UE指示PSAP已经开始振铃。Exemplarily, in response to the received invite request message, after ringing, the PSAP sends a 180Ringing message to the E-CSCF/EATF to indicate to the calling UE that the PSAP has started ringing.
S709,E-CSCF/EATF向P-CSCF发送180Ringing消息。S709, the E-CSCF/EATF sends a 180 Ringing message to the P-CSCF.
S710,P-CSCF向UE发送180Ringing消息。S710, the P-CSCF sends a 180Ringing message to the UE.
S711,PSAP向E-CSCF/EATF发送200OK响应消息。该200OK响应消息用于指示PSAP已准备好
与UE进行音视频通话的端口、编码格式等资源。S711, PSAP sends a 200OK response message to E-CSCF/EATF. The 200OK response message is used to indicate that PSAP is ready Resources such as ports and encoding formats for audio and video calls with UE.
S712,E-CSCF/EATF向P-CSCF发送200OK响应消息。S712, E-CSCF/EATF sends a 200OK response message to P-CSCF.
S713,P-CSCF向UE发送200OK响应消息。S713, the P-CSCF sends a 200OK response message to the UE.
S714,UE向P-CSCF发送ACK消息。该ACK消息用于指示UE已成功接收来自PSAP的200OK响应消息。S714, the UE sends an ACK message to the P-CSCF. The ACK message is used to indicate that the UE has successfully received the 200OK response message from the PSAP.
S715,P-CSCF向E-CSCF/EATF发送ACK消息。S715, the P-CSCF sends an ACK message to the E-CSCF/EATF.
S716,E-CSCF/EATF向PSAP发送ACK消息。S716, E-CSCF/EATF sends an ACK message to PSAP.
S717,UE和PSAP之间进行紧急呼叫通话。S717: An emergency call is made between the UE and the PSAP.
S718,UE向P-CSCF发送BYE消息。该BYE消息用于请求结束紧急呼叫通话。S718, the UE sends a BYE message to the P-CSCF. The BYE message is used to request to end the emergency call.
S719,P-CSCF向PSAP发送BYE消息。S719, P-CSCF sends a BYE message to PSAP.
S720,P-CSCF触发IMS紧急呼叫专有承载释放流程。S720: The P-CSCF triggers the IMS emergency call dedicated bearer release process.
S721,PSAP向P-CSCF发送200OK响应消息。S721, PSAP sends a 200OK response message to P-CSCF.
S722,P-CSCF向UE发送200OK响应消息。S722, the P-CSCF sends a 200OK response message to the UE.
上文结合附图介绍了本申请实施例能够应用的示例性系统架构,以及本申请中涉及的基本概念,下文中将结合附图详细介绍本申请提供的通信方法和通信装置。The above text, in combination with the accompanying drawings, introduces an exemplary system architecture that can be applied in the embodiments of the present application, as well as the basic concepts involved in the present application. The following text will introduce in detail the communication method and communication device provided in the present application in combination with the accompanying drawings.
下文示出的实施例并未对本申请实施例提供的方法的执行主体的具体结构特别限定,只要能够通过运行记录有本申请实施例的提供的方法的代码的程序,以根据本申请实施例提供的方法进行通信即可,例如,本申请实施例提供的方法的执行主体可以是核心网设备和终端设备,或者是核心网设备或者终端设备中能够调用程序并执行程序的功能模块。The embodiments shown below do not particularly limit the specific structure of the execution subject of the method provided in the embodiments of the present application. As long as it is possible to communicate according to the method provided in the embodiments of the present application by running a program that records the code of the method provided in the embodiments of the present application, for example, the execution subject of the method provided in the embodiments of the present application can be a core network device and a terminal device, or a functional module in the core network device or the terminal device that can call and execute the program.
为了便于理解本申请实施例,做出以下几点说明。In order to facilitate understanding of the embodiments of the present application, the following explanations are made.
第一,在本申请中,“用于指示”可以理解为“使能”,“使能”可以包括直接使能和间接使能。当描述某一信息用于使能A时,可以包括该信息直接使能A或间接使能A,而并不代表该信息中一定携带有A。First, in this application, "used to indicate" can be understood as "enable", and "enable" can include direct enablement and indirect enablement. When describing that a certain information is used to enable A, it can include that the information directly enables A or indirectly enables A, but it does not mean that the information must carry A.
将信息所使能的信息称为待使能信息,则具体实现过程中,对待使能信息进行使能的方式有很多种,例如但不限于,可以直接使能待使能信息,如待使能信息本身或者该待使能信息的索引等。也可以通过使能其他信息来间接使能待使能信息,其中该其他信息与待使能信息之间存在关联关系。还可以仅仅使能待使能信息的一部分,而待使能信息的其他部分则是已知的或者提前约定的。例如,还可以借助预先约定(例如协议规定)的各个信息的排列顺序来实现对特定信息的使能,从而在一定程度上降低使能开销。同时,还可以识别各个信息的通用部分并统一使能,以降低单独使能同样的信息而带来的使能开销。The information enabled by the information is called information to be enabled. In the specific implementation process, there are many ways to enable the information to be enabled, such as but not limited to, the information to be enabled can be directly enabled, such as the information to be enabled itself or the index of the information to be enabled. The information to be enabled can also be indirectly enabled by enabling other information, wherein there is an association relationship between the other information and the information to be enabled. It is also possible to enable only a part of the information to be enabled, while the other parts of the information to be enabled are known or agreed in advance. For example, the enabling of specific information can also be achieved by means of the arrangement order of each piece of information agreed in advance (such as specified by the protocol), thereby reducing the enabling overhead to a certain extent. At the same time, the common parts of each piece of information can also be identified and enabled uniformly to reduce the enabling overhead caused by enabling the same information separately.
第二,在本申请中示出的第一、第二以及各种数字编号(例如,“#1”、“#2”等)仅为描述方便,用于区分的对象,并不用来限制本申请实施例的范围。例如,区分不同消息等。而不是用于描述特定的顺序或先后次序。应该理解这样描述的对象在适当情况下可以互换,以便能够描述本申请的实施例以外的方案。Second, the first, second, and various numerical numbers (e.g., "#1", "#2", etc.) shown in the present application are only for convenience of description and are used to distinguish objects, and are not used to limit the scope of the embodiments of the present application. For example, to distinguish different messages, etc., rather than to describe a specific order or sequence. It should be understood that the objects described in this way can be interchangeable where appropriate so as to be able to describe solutions other than the embodiments of the present application.
第三,术语“包括”和“具有”以及他们的任何变形,意图在于覆盖不排他的包含,例如,包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元,而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。Third, the terms "comprises" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such process, method, product or apparatus.
第四,在本申请中,“预配置”可包括预先定义,例如,协议定义。其中,“预先定义”可以通过在设备(例如,包括各个网元)中预先保存相应的代码、表格或其他可用于指示相关信息的方式来实现,本申请对于其具体的实现方式不做限定。Fourth, in this application, "pre-configuration" may include pre-definition, such as protocol definition. Among them, "pre-definition" can be implemented by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in a device (for example, including each network element), and this application does not limit its specific implementation method.
第五,本申请实施例中涉及的“保存”,可以是指的保存在一个或者多个存储器中。所述一个或者多个存储器,可以是单独的设置,也可以是集成在编码器或者译码器,处理器、或通信装置中。所述一个或者多个存储器,也可以是一部分单独设置,一部分集成在译码器、处理器、或通信装置中。存储器的类型可以是任意形式的存储介质,本申请并不对此限定。Fifth, the "storage" involved in the embodiments of the present application may refer to storage in one or more memories. The one or more memories may be separately set or integrated in an encoder or decoder, a processor, or a communication device. The one or more memories may also be partially separately set and partially integrated in a decoder, a processor, or a communication device. The type of memory may be any form of storage medium, which is not limited by the present application.
第六,本申请实施例中涉及的“协议”可以是指通信领域的标准协议,例如可以包括4G/5G协议、新空口(new radio,NR)协议以及应用于未来的通信系统中的相关协议,本申请对此不做限定。Sixth, the "protocol" involved in the embodiments of the present application may refer to a standard protocol in the communication field, for example, it may include 4G/5G protocols, new radio (NR) protocols, and related protocols used in future communication systems, and the present application does not limit this.
第七,本申请说明书附图部分的方法流程图中的虚线框表示可选的步骤。Seventh, the dotted boxes in the method flow chart in the accompanying drawings of the present application specification represent optional steps.
以下,以网元之间的交互为例详细说明本申请实施例提供的通信方法。应理解,本申请中的各实施例中术语和步骤可以互相参考。
The communication method provided in the embodiment of the present application is described in detail below by taking the interaction between network elements as an example. It should be understood that the terms and steps in the various embodiments of the present application can refer to each other.
图8示出了本申请实施例提供的方法800的示例性流程图。在方法800中,会话控制功能设备为多媒体电话应用服务器,并且由多媒体电话应用服务器控制IMS会话的两侧设备之间的数据通道的创建流程。下面结合图8中的各个步骤对方法800作示例性说明。FIG8 shows an exemplary flow chart of a method 800 provided in an embodiment of the present application. In the method 800, the session control function device is a multimedia telephony application server, and the multimedia telephony application server controls the creation process of the data channel between the two side devices of the IMS session. The method 800 is exemplarily described below in conjunction with each step in FIG8.
S810,第二通信设备向第一通信设备发送呼叫响应消息;对应地,第一通信设备接收来自第二通信设备的该呼叫响应消息。S810, the second communication device sends a call response message to the first communication device; correspondingly, the first communication device receives the call response message from the second communication device.
示例性地,第二通信设备通过会话控制网元向第一通信设备发送呼叫响应消息,该呼叫响应消息用于指示第一通信设备与第二通信设备之间的IMS会话建立完成。也就是说,第一通信设备接收来自第二通信设备的该呼叫响应消息之后,可以根据该呼叫响应消息确定第一通信设备与第二通信设备之间的IMS会话建立完成Exemplarily, the second communication device sends a call response message to the first communication device through the session control network element, and the call response message is used to indicate that the IMS session between the first communication device and the second communication device is established. That is, after the first communication device receives the call response message from the second communication device, it can determine that the IMS session between the first communication device and the second communication device is established according to the call response message.
可以理解的是,在本申请实施例中,第一通信设备为主叫设备,第二通信设备为第一通信设备对应的被叫设备,也就是说,第一通信设备与第二通信设备是处于同一个IMS会话业务的两个设备。可选地,在S810之前,由第一通信设备向第二通信设备发起了呼叫流程以建立第一通信设备与第二通信设备之间的IMS会话。下面结合S811-S813作示例性说明。It can be understood that in the embodiment of the present application, the first communication device is a calling device, and the second communication device is a called device corresponding to the first communication device, that is, the first communication device and the second communication device are two devices in the same IMS session service. Optionally, before S810, the first communication device initiates a call process to the second communication device to establish an IMS session between the first communication device and the second communication device. The following is an exemplary description in conjunction with S811-S813.
可选地,S811,第一通信设备向会话控制功能设备发送初始invite请求消息。对应地,会话控制功能设备接收来自该第一通信设备的该初始invite请求消息。Optionally, S811, the first communication device sends an initial invite request message to the session control function device. Correspondingly, the session control function device receives the initial invite request message from the first communication device.
示例性地,第一通信设备向会话控制功能设备发送初始invite请求消息,以请求建立第一通信设备与第二通信设备之间的IMS会话。Exemplarily, the first communication device sends an initial invite request message to the session control function device to request to establish an IMS session between the first communication device and the second communication device.
可选地,第一通信设备不在该初始invite请求消息中携带用于建立第一数据通道和/或第二数据通道的描述信息。Optionally, the first communication device does not carry description information for establishing the first data channel and/or the second data channel in the initial invite request message.
作为一种示例,本申请实施例中的IMS会话可以是紧急呼叫,即第一通信设备通过该初始invite请求消息请求建立与第二通信设备之间的紧急呼叫,此时第一通信设备可以在该初始invite请求消息中携带紧急呼叫标识,和/或被叫ID(此时被叫ID为紧急呼叫号码)。在这种情况下,第二通信设备可以是公共安全应答点(如PSAP)。As an example, the IMS session in the embodiment of the present application can be an emergency call, that is, the first communication device requests to establish an emergency call with the second communication device through the initial invite request message, and the first communication device can carry an emergency call identifier and/or a called party ID (the called party ID is an emergency call number) in the initial invite request message. In this case, the second communication device can be a public safety answering point (such as a PSAP).
可选地,S812,会话控制功能设备压制触发建立第一数据通道。Optionally, S812, the session control function device suppresses a trigger to establish a first data channel.
示例性地,会话控制功能设备接收来自第一通信设备的初始invite请求消息之后,压制触发建立第一数据通道。其中,会话控制功能设备压制触发建立第一数据通道,指的是会话控制功能设备禁止第一数据通道的建立流程,或者说,会话控制功能设备不触发建立第一数据通道,或者说,会话控制功能设备不向数据通道信令功能网元上报呼叫事件。Exemplarily, after receiving the initial invite request message from the first communication device, the session control function device suppresses the triggering of establishing the first data channel. The session control function device suppresses the triggering of establishing the first data channel, which means that the session control function device prohibits the establishment process of the first data channel, or the session control function device does not trigger the establishment of the first data channel, or the session control function device does not report the call event to the data channel signaling function network element.
可选地,在一种可能的实现方式中,多媒体应用服务器可以在任意IMS呼叫建立流程压制触发建立第一数据通道,也可以在确定初始invite请求消息中没有携带用于创建第一数据通道的描述信息,和/或确定当前呼叫为IMS紧急呼叫的情况下,压制触发建立第一数据通道。Optionally, in a possible implementation, the multimedia application server may suppress the trigger for establishing the first data channel in any IMS call establishment process, or may suppress the trigger for establishing the first data channel when it is determined that the initial invite request message does not carry descriptive information for creating the first data channel, and/or when it is determined that the current call is an IMS emergency call.
可以理解的是,会话控制功能设备通过在IMS会话建立流程压制触发建立第一数据通道,从而可以降低IMS会话接通的时延,即可以避免因建立第一数据通道导致IMS会话接通时延变大的情况,提高了通信效率。在一些特殊场景下,如IMS紧急呼叫的场景下,降低IMS会话接通的时延,可以使得用户的报警信息可以得到尽快的处理,从而有效保障用户的生命财产安全。It is understandable that the session control function device can reduce the delay of IMS session connection by suppressing the trigger to establish the first data channel in the IMS session establishment process, that is, it can avoid the situation where the delay of IMS session connection becomes longer due to the establishment of the first data channel, thereby improving communication efficiency. In some special scenarios, such as the IMS emergency call scenario, reducing the delay of IMS session connection can enable the user's alarm information to be processed as soon as possible, thereby effectively protecting the user's life and property safety.
S813,第一通信设备与第二通信设备之间的IMS会话建立流程。S813, an IMS session establishment process between the first communication device and the second communication device.
示例性地,会话控制功能设备将初始invite请求消息转发给第二通信设备,以触发第一通信设备与第二通信设备之间的IMS会话建立流程,具体过程本申请不作限定。Exemplarily, the session control function device forwards the initial invite request message to the second communication device to trigger an IMS session establishment process between the first communication device and the second communication device. The specific process is not limited in this application.
在第一通信设备与第二通信设备之间的IMS会话建立完成之后,第二通信设备向第一通信设备发送呼叫响应消息,即执行S810。作为一种示例,该呼叫响应消息为摘机200OK响应消息,则该呼叫响应消息为第一通信设备的初始invite请求消息的响应消息。After the IMS session between the first communication device and the second communication device is established, the second communication device sends a call response message to the first communication device, that is, executes S810. As an example, the call response message is an off-hook 200OK response message, and the call response message is a response message to the initial invite request message of the first communication device.
S820,第一通信设备向会话控制功能设备发送re-invite请求消息。对应地,会话控制功能设备接收来自第一通信设备的该re-invite请求消息。S820: The first communication device sends a re-invite request message to the session control function device. Correspondingly, the session control function device receives the re-invite request message from the first communication device.
示例性地,第一通信设备接收来自第二通信设备的呼叫响应消息之后,响应于该呼叫响应消息,第一通信设备向会话控制功能设备发送re-invite请求消息。也就是说,该re-invite请求消息是第一通信设备在与第二通信设备之间的IMS会话建立完成之后,发送给会话控制功能设备的。Exemplarily, after the first communication device receives a call response message from the second communication device, in response to the call response message, the first communication device sends a re-invite request message to the session control function device. That is, the re-invite request message is sent to the session control function device after the IMS session between the first communication device and the second communication device is established.
在本申请实施例中,该会话控制功能设备为多媒体电话应用服务器,该re-invite请求消息包含用于建立第一数据通道的第一描述信息,也就是说,该re-invite请求消息用于触发建立第一数据通道。该第一数
据通道用于下载数据通道应用,该数据通道应用用于在第一通信设备与第二通信设备之间进行除语音通话或视频通话之外的通信。例如,数据通道应用通过在第一通信设备与第二通信设备之间传输附加通信信息,以在第一通信设备之间进行除语音通话或视频通话之外的通信。作为一种示例,该第一数据通道包括该第一通信设备与该数据通道媒体功能网元之间的第一引导数据通道,以及第二数据通道与该数据通道媒体功能网元之间的第二引导数据通道,第一通信设备可以通过该第一引导数据通道从数据通道媒体功能网元下载数据通道应用,第二通信设备可以通过该第二引导数据通道从数据通道媒体功能网元下载数据通道应用。In the embodiment of the present application, the session control function device is a multimedia telephone application server, and the re-invite request message includes first description information for establishing a first data channel, that is, the re-invite request message is used to trigger the establishment of the first data channel. The data channel is used to download a data channel application, and the data channel application is used to perform communications other than voice calls or video calls between the first communication device and the second communication device. For example, the data channel application transmits additional communication information between the first communication device and the second communication device to perform communications other than voice calls or video calls between the first communication device. As an example, the first data channel includes a first guided data channel between the first communication device and the data channel media function network element, and a second guided data channel between the second data channel and the data channel media function network element. The first communication device can download the data channel application from the data channel media function network element through the first guided data channel, and the second communication device can download the data channel application from the data channel media function network element through the second guided data channel.
因此基于上述方案,第一通信设备是在与第二通信设备之间的IMS会话建立完成之后,发起第一数据通道的建立流程,以防止第一数据通道的建立流程会增加第一通信设备与第二通信设备之间的IMS会话建立的时延。Therefore, based on the above solution, the first communication device initiates the establishment process of the first data channel after the IMS session between the first communication device and the second communication device is established, so as to prevent the establishment process of the first data channel from increasing the delay of establishing the IMS session between the first communication device and the second communication device.
可选地,S830,会话控制功能设备触发建立第一数据通道。Optionally, S830, the session control function device triggers establishment of a first data channel.
示例性地,会话控制功能设备接收来自第一通信设备的re-invite请求消息之后,根据该re-invite请求消息触发建立第一数据通道。Exemplarily, after receiving the re-invite request message from the first communication device, the session control function device triggers establishment of the first data channel according to the re-invite request message.
在一种可能的实现方式中,该re-invite请求消息还包含用于请求建立第二数据通道的第二描述信息,该第二数据通道用于传输数据通道应用的附加通信信息。因此这种实现方式中,可以同时建立第一数据通道和第二数据通道,而不需要通过两个re-invite流程分别建立第一数据通道和第二数据通道,从而可以降低建立数据通道的时间,提高通信效率。下面对这种情况作示例性说明:In a possible implementation, the re-invite request message also includes second description information for requesting the establishment of a second data channel, and the second data channel is used to transmit additional communication information of the data channel application. Therefore, in this implementation, the first data channel and the second data channel can be established at the same time, without the need to establish the first data channel and the second data channel separately through two re-invite processes, thereby reducing the time for establishing the data channel and improving communication efficiency. The following is an exemplary description of this situation:
UE在S820向会话控制功能设备发送re-invite请求消息,并在该re-invite请求消息中携带第一通信设备用于建立第一数据通道的第一描述信息,以及用于建立第二数据通道的第二描述信息At S820, the UE sends a re-invite request message to the session control function device, and the re-invite request message carries first description information of the first communication device for establishing the first data channel and second description information for establishing the second data channel.
在第二数据通道需要锚定到数据通道媒体功能网元的情况下,假设该第一数据通道包括该第一通信设备与该数据通道媒体功能网元之间的第一引导数据通道,以及第二通信设备与该数据通道媒体功能网元之间的第二引导数据通道,该第二数据通道包括该第一通信设备与该数据通道媒体功能网元之间的第一应用数据通道,以及第二通信设备与该数据通道媒体功能网元之间的第二应用数据通道。会话控制功能设备向数据通道媒体功能网元请求第三描述信息、第四描述信息、第五描述信息以及第六描述信息;其中,第三描述信息用于数据通道媒体功能网元建立第一引导数据通道第四描述信息用于数据通道媒体功能网元建立第一应用数据通道,第五描述信息用于数据通道媒体功能网元建立第二引导数据通道的,第六描述信息用于数据通道媒体功能网元建立第二应用数据通道。进一步地,会话控制功能设备向第二通信设备发送请求消息,该请求消息包括第五描述信息和第六描述信息。第二通信设备接收来自会话控制功能设备的该请求消息之后,确定用于建立第二引导数据通道的第七描述信息以及用于建立第二应用数据通道的第八描述信息,然后向会话控制功能设备发送响应消息,并在该响应消息中携带该第七描述信息以及该第八描述信息;另一方面,数据通道媒体功能网元向第一通信设备发送第三描述信息和第四描述信息,以及向数据通道媒体功能网元发送第七描述信息和第八描述信息。基于上述流程,第一通信设备与数据通道媒体功能网元之间协商确定了用于建立第一引导数据通道的描述信息(即第三描述信息),以及用于建立第一应用数据通道的描述信息(即第四描述信息);第二通信设备与数据通道媒体功能网元之间协商确定了用于建立第二引导数据通道的描述信息(即第七描述信息),以及用于建立第二应用数据通道的描述信息(即第八描述信息)。In the case where the second data channel needs to be anchored to the data channel media function network element, it is assumed that the first data channel includes a first pilot data channel between the first communication device and the data channel media function network element, and a second pilot data channel between the second communication device and the data channel media function network element, and the second data channel includes a first application data channel between the first communication device and the data channel media function network element, and a second application data channel between the second communication device and the data channel media function network element. The session control function device requests the data channel media function network element for third description information, fourth description information, fifth description information, and sixth description information; wherein the third description information is used for the data channel media function network element to establish the first pilot data channel, the fourth description information is used for the data channel media function network element to establish the first application data channel, the fifth description information is used for the data channel media function network element to establish the second pilot data channel, and the sixth description information is used for the data channel media function network element to establish the second application data channel. Further, the session control function device sends a request message to the second communication device, and the request message includes the fifth description information and the sixth description information. After receiving the request message from the session control function device, the second communication device determines the seventh description information for establishing the second guided data channel and the eighth description information for establishing the second application data channel, and then sends a response message to the session control function device, and carries the seventh description information and the eighth description information in the response message; on the other hand, the data channel media function network element sends the third description information and the fourth description information to the first communication device, and sends the seventh description information and the eighth description information to the data channel media function network element. Based on the above process, the first communication device and the data channel media function network element negotiate and determine the description information (i.e., the third description information) for establishing the first guided data channel, and the description information (i.e., the fourth description information) for establishing the first application data channel; the second communication device and the data channel media function network element negotiate and determine the description information (i.e., the seventh description information) for establishing the second guided data channel, and the description information (i.e., the eighth description information) for establishing the second application data channel.
在第二数据通道不锚定到数据通道媒体功能网元的情况下,假设该第一数据通道包括该第一通信设备与该数据通道媒体功能网元之间的第三引导数据通道,以及第二通信设备与该数据通道媒体功能网元之间的第四引导数据通道,该第二数据通道包括该第一通信设备与该第二通信设备之间的第三应用数据通道。会话控制功能设备向数据通道媒体功能网元请求第九描述信息和第十描述信息,其中,该第九描述信息用于数据通道媒体功能网元第三引导数据通道,第十描述信息用于数据通道媒体功能网元建立第四引导数据通道;会话控制功能设备向第二通信设备发送请求消息,该请求消息包括第二描述信息和第十描述信息;会话控制功能设备接收来自第二通信设备的响应消息,该响应消息包括第十一描述信息和第十二描述信息,该第十一描述信息用于第二通信设备建立第四引导数据通道,该第十二描述信息用于该第二通信设备建立第三应用数据通道。进一步地,会话控制功能设备向第一通信设备发送第九描述信息以及第十二描述信息,以及向数据通道媒体功能网元发送第十一描述信息。基于上述流程,第一通信设备与数据通道媒体功能网元之间协商确定了用于建立第三引导数据通道的描述信息(即第九描述信息);第二通信设备与数据通道媒体功能网元之间协商确定了用于建立第四引导数据通道的描述信息
(即第十一描述信息);第一通信设备与第二通信设备之间协商确定了用于建立第三应用数据通道的描述信息(即第十二描述信息)。In the case where the second data channel is not anchored to the data channel media function network element, it is assumed that the first data channel includes a third pilot data channel between the first communication device and the data channel media function network element, and a fourth pilot data channel between the second communication device and the data channel media function network element, and the second data channel includes a third application data channel between the first communication device and the second communication device. The session control function device requests the data channel media function network element for the ninth description information and the tenth description information, wherein the ninth description information is used for the third pilot data channel of the data channel media function network element, and the tenth description information is used for the data channel media function network element to establish the fourth pilot data channel; the session control function device sends a request message to the second communication device, the request message includes the second description information and the tenth description information; the session control function device receives a response message from the second communication device, the response message includes the eleventh description information and the twelfth description information, the eleventh description information is used for the second communication device to establish the fourth pilot data channel, and the twelfth description information is used for the second communication device to establish the third application data channel. Further, the session control function device sends the ninth description information and the twelfth description information to the first communication device, and sends the eleventh description information to the data channel media function network element. Based on the above process, the first communication device and the data channel media function network element negotiate to determine the description information (i.e., the ninth description information) for establishing the third guided data channel; the second communication device and the data channel media function network element negotiate to determine the description information for establishing the fourth guided data channel. (ie, the eleventh description information); the first communication device and the second communication device negotiate and determine the description information (ie, the twelfth description information) used to establish the third application data channel.
可选地,第一通信设备可以指示第二数据通道是否锚定到数据通道媒体功能网元。其中,第二数据通道需要锚定到数据通道媒体功能网元,指的是第一通信设备与第二通信设备之间的第二数据通道,包括第一通信设备与数据通道媒体功能网元之间的数据通道以及数据通道媒体功能网元与第二通信设备之间的数据通道。也就是说,第一通信设备不能建立直接到第二通信设备的第二数据通道。第二数据通道不需要锚定到数据通道媒体功能网元,指的是第一通信设备可以直接建立到第二通信设备的第二数据通道,而不需要经过数据通达媒体功能网元。第一通信设备通过在re-invite请求消息中携带的描述信息隐性指示第二数据通道是否锚定到数据通道媒体功能网元,例如,第一设备用于建立第一数据通道的描述信息与用于建立第二数据通道的描述信息不同,则表示第二数据通道不锚定到数据通道媒体功能网元;如果第一设备用于建立第一数据通道的描述信息与用于建立第二数据通道的描述信息相同,则表示第二数据通道锚定到数据通道媒体功能网元;或者,第一通信设备也可以在re-invite请求消息中携带显性的指示信息来指示第二数据通道是否锚定到数据通道媒体功能网元。Optionally, the first communication device may indicate whether the second data channel is anchored to the data channel media function network element. The second data channel needs to be anchored to the data channel media function network element, which refers to the second data channel between the first communication device and the second communication device, including the data channel between the first communication device and the data channel media function network element and the data channel media function network element and the second communication device. In other words, the first communication device cannot establish a second data channel directly to the second communication device. The second data channel does not need to be anchored to the data channel media function network element, which means that the first communication device can directly establish a second data channel to the second communication device without going through the data access media function network element. The first communication device implicitly indicates whether the second data channel is anchored to the data channel media function network element through the description information carried in the re-invite request message. For example, if the description information used by the first device to establish the first data channel is different from the description information used to establish the second data channel, it means that the second data channel is not anchored to the data channel media function network element; if the description information used by the first device to establish the first data channel is the same as the description information used to establish the second data channel, it means that the second data channel is anchored to the data channel media function network element; alternatively, the first communication device may also carry explicit indication information in the re-invite request message to indicate whether the second data channel is anchored to the data channel media function network element.
在另一种可能的实现方式中,第一通信设备在第一数据通道建立完成之后,再触发建立第二数据通道。也就是说,第一通信设备可以分别通过两个re-invite流程建立第一数据通道和第二数据通道,具体过程本申请不作限定。In another possible implementation, the first communication device triggers the establishment of the second data channel after the first data channel is established. That is, the first communication device can establish the first data channel and the second data channel through two re-invite processes respectively, and the specific process is not limited in this application.
在又一种可能的实现方式中,该第一数据通达还用于传输数据通道应用的附加通信信息。也就是说,第一通信设备通过re-invite流程请求建立第一数据通道,该第一数据通道既可以用于下载数据通道应用,又可以传输数据通道应用的附加通信信息。因此这种实现方式中,可以不需要再单独建立第二数据通道,从而可以降低建立数据通道的时间,提高通信效率。In another possible implementation, the first data channel is also used to transmit additional communication information of the data channel application. That is, the first communication device requests to establish the first data channel through the re-invite process, and the first data channel can be used to download the data channel application and transmit additional communication information of the data channel application. Therefore, in this implementation, it is not necessary to establish a second data channel separately, thereby reducing the time to establish the data channel and improving communication efficiency.
基于上述方案,通过在第一通信设备与第二通信设备之间的IMS会话建立完成之后,才发起第一数据通道的建立流程,从而可以降低第一数据通道的建立对通话体验的负面影响,具体也可以参考第一方面,不再赘述。Based on the above solution, the establishment process of the first data channel is initiated only after the IMS session between the first communication device and the second communication device is established, thereby reducing the negative impact of the establishment of the first data channel on the call experience. For details, please refer to the first aspect and will not be repeated here.
另一方面,上述方案可以应用于IMS紧急呼叫的场景中,通过上述方案,可以使得用户的报警信息可以得到尽快的处理,从而有效保障用户的生命财产安全。并且在这种场景下,可以在紧急呼叫的场景下,建立数据通道,为通信双方提供除语音通话或视频通话以外的通信服务,从而可以提高用户体验。On the other hand, the above solution can be applied to the IMS emergency call scenario. Through the above solution, the user's alarm information can be processed as quickly as possible, thereby effectively protecting the user's life and property safety. In this scenario, a data channel can be established in the emergency call scenario to provide communication services other than voice calls or video calls for both parties, thereby improving the user experience.
图9示出了本申请实施例提供的方法900的示例性流程图。在方法900中,会话控制功能设备为紧急呼叫会话控制功能网元,通过该紧急呼叫会话控制功能网元的功能进行增强,使得紧急呼叫会话控制功能网元控制紧急呼叫的两侧设备之间的数据通道的创建流程。下面结合图9中的各个步骤对方法900作示例性说明。FIG9 shows an exemplary flow chart of a method 900 provided in an embodiment of the present application. In the method 900, the session control function device is an emergency call session control function network element, and the function of the emergency call session control function network element is enhanced so that the emergency call session control function network element controls the creation process of the data channel between the devices on both sides of the emergency call. The method 900 is exemplarily described below in conjunction with the various steps in FIG9.
S910,第二通信设备向第一通信设备发送呼叫响应消息;对应地,第一通信设备接收来自第二通信设备的该呼叫响应消息。S910, the second communication device sends a call response message to the first communication device; correspondingly, the first communication device receives the call response message from the second communication device.
示例性地,该呼叫响应消息用于指示第一通信设备与第二通信设备之间的通过紧急呼叫建立的IMS会话已建立完成。也就是说,第一通信设备接收来自第二通信设备的该呼叫响应消息之后,可以根据该呼叫响应消息确定第一通信设备与第二通信设备之间的IMS会话已经建立完成。Exemplarily, the call response message is used to indicate that the IMS session established between the first communication device and the second communication device through the emergency call has been established. That is, after the first communication device receives the call response message from the second communication device, it can determine that the IMS session between the first communication device and the second communication device has been established according to the call response message.
可以理解的是,在本申请实施例中,第一通信设备为紧急呼叫的主叫设备,第二通信设备为紧急呼叫的被叫设备(如第二通信设备为公共安全应答点),也就是说,第一通信设备与第二通信设备是处于同一紧急呼叫业务的两个设备。It can be understood that in the embodiment of the present application, the first communication device is the calling device of the emergency call, and the second communication device is the called device of the emergency call (such as the second communication device is a public safety answering point), that is, the first communication device and the second communication device are two devices in the same emergency call service.
可选地,在S910之前,由第一通信设备向第二通信设备发起了紧急呼叫流程,并在S911执行了第一通信设备与第二通信设备之间的紧急呼叫建立流程。具体过程本申请不作限定。Optionally, before S910, the first communication device initiates an emergency call process to the second communication device, and in S911, an emergency call establishment process is executed between the first communication device and the second communication device. The specific process is not limited in this application.
S920,第一通信设备向会话控制功能设备发送re-invite请求消息。对应地,会话控制功能设备接收来自第一通信设备的该re-invite请求消息。S920: The first communication device sends a re-invite request message to the session control function device. Correspondingly, the session control function device receives the re-invite request message from the first communication device.
示例性地,第一通信设备接收来自第二通信设备的呼叫响应消息之后,响应于该呼叫响应消息,第一通信设备向会话控制功能设备发送re-invite请求消息,该re-invite请求消息包含用于建立第一数据通道的第一描述信息,该第一数据通道用于下载数据通道应用,该数据通通道应用用于在第一通信设备与第二通信设备之间进行除语音通话或视频通话之外的通信。Exemplarily, after the first communication device receives a call response message from the second communication device, in response to the call response message, the first communication device sends a re-invite request message to the session control function device, and the re-invite request message includes first description information for establishing a first data channel, and the first data channel is used to download a data channel application, and the data channel application is used to conduct communications other than voice calls or video calls between the first communication device and the second communication device.
因此,第一通信设备是在与第二通信设备之间的IMS会话建立完成之后,发起第一数据通道的建立流程,以防止第一数据通道的建立流程会增加呼叫建立的时延。
Therefore, the first communication device initiates the process of establishing the first data channel after the IMS session between the first communication device and the second communication device is established, so as to prevent the process of establishing the first data channel from increasing the delay of call establishment.
可选地,S930,会话控制功能设备触发建立第一数据通道。Optionally, S930, the session control function device triggers establishment of a first data channel.
示例性地,多媒体电话应用服务器接收来自第一通信设备的re-invite请求消息之后,根据该re-invite请求消息触发建立第一数据通道。具体实现过程与方法800中的S830部分介绍的方案类似,为了简洁,这里不再赘述。Exemplarily, after receiving the re-invite request message from the first communication device, the multimedia telephony application server triggers the establishment of the first data channel according to the re-invite request message. The specific implementation process is similar to the solution introduced in S830 of method 800, and will not be repeated here for brevity.
基于上述方案,在第一通信设备与第二通信设备之间由IMS紧急呼叫建立的IMS会话建立完成之后,才发起第一数据通道的建立流程,从而可以降低数据通道的建立对通话体验的负面影响,例如可以使得得用户的报警信息可以得到尽快的处理,从而有效保障用户的生命财产安全。并且在这种场景下,可以在紧急呼叫的场景下,建立数据通道,为通信双方提供除语音通话或视频通话以外的通信服务,从而可以提高用户体验。Based on the above solution, the establishment process of the first data channel is initiated only after the IMS session established by the IMS emergency call between the first communication device and the second communication device is established, thereby reducing the negative impact of the establishment of the data channel on the call experience, for example, the user's alarm information can be processed as quickly as possible, thereby effectively protecting the user's life and property safety. In addition, in this scenario, a data channel can be established in the emergency call scenario to provide communication services other than voice calls or video calls for both parties, thereby improving the user experience.
图10示出了适用于本申请实施例的一种网络架构图。在图10所示的网络架构中,UE可以通过DCMF与PSAP建立紧急呼叫,并且由MMTel AS控制UE与PSAP之间的数据通道的建立流程。图11至图15所示的方法1100-方法1500适用于图10所示的网络架构,方法1100-方法1500可以与上述方法800对应,即方法1100-方法1500可以看做方法800对应的几种可能的实现方式。具体地,方法800中的第一通信设备可对应于方法1100-方法1500中的UE,方法800中的第二通信设备可对应于方法1100-方法1500中的PSAP,方法800中的会话控制功能设备可对应于方法1100-方法1500中的MMTel AS。另外,方法800中的第一描述信息可对应于方法1100或方法1200中的BDC SDP offer#1,方法800中的第二描述信息可对应于方法1100或方法1200中的ADC SDP offer#1;或者,方法800中的第一描述信息可对应于方法1300-方法1500中的BDC offer#1。方法1100中的S1110-S1125可对应于方法800中第一数据通道和第二数据通道的建立流程,方法1200中的S1210-S1226可对应于方法800中第一数据通道和第二数据通道的建立流程,方法1300中的S1310-S1325可对应于方法800中第一数据通道的建立流程,方法1300中的S1326-S1341可对应于方法800中第二数据通道的建立流程,方法1400中的S1410-S1425可对应于方法800中第一数据通道的建立流程,方法1400中的S1426-S1437可对应于方法800中第二数据通道的建立流程,方法1500中的S1510-S1525可对应于方法800中第一数据通道的建立流程。FIG10 shows a network architecture diagram applicable to an embodiment of the present application. In the network architecture shown in FIG10, the UE can establish an emergency call with the PSAP through the DCMF, and the MMTel AS controls the process of establishing the data channel between the UE and the PSAP. Methods 1100-1500 shown in FIGS. 11 to 15 are applicable to the network architecture shown in FIG10, and methods 1100-1500 can correspond to the above-mentioned method 800, that is, methods 1100-1500 can be regarded as several possible implementations corresponding to method 800. Specifically, the first communication device in method 800 may correspond to the UE in methods 1100-1500, the second communication device in method 800 may correspond to the PSAP in methods 1100-1500, and the session control function device in method 800 may correspond to the MMTel AS in methods 1100-1500. In addition, the first description information in method 800 may correspond to BDC SDP offer#1 in method 1100 or method 1200, and the second description information in method 800 may correspond to ADC SDP offer#1 in method 1100 or method 1200; or, the first description information in method 800 may correspond to BDC offer#1 in methods 1300-1500. S1110-S1125 in method 1100 may correspond to the process of establishing the first data channel and the second data channel in method 800, S1210-S1226 in method 1200 may correspond to the process of establishing the first data channel and the second data channel in method 800, S1310-S1325 in method 1300 may correspond to the process of establishing the first data channel in method 800, S1326-S1341 in method 1300 may correspond to the process of establishing the second data channel in method 800, S1410-S1425 in method 1400 may correspond to the process of establishing the first data channel in method 800, S1426-S1437 in method 1400 may correspond to the process of establishing the second data channel in method 800, and S1510-S1525 in method 1500 may correspond to the process of establishing the first data channel in method 800.
图11示出了一种适用于图10所示的网络架构的一种方法1100的示例性流程图。在方法1100中,UE在与PSAP之间的紧急通话建立完成之后,同时发起BDC和ADC创建流程,以减少紧急通话接通的时延。并且在该实施例中,ADC锚定到DCMF。下面结合图11中的各个步骤对方法1100做示例性说明。FIG11 shows an exemplary flow chart of a method 1100 applicable to the network architecture shown in FIG10. In the method 1100, after the emergency call between the UE and the PSAP is established, the UE simultaneously initiates the BDC and ADC creation processes to reduce the delay of the emergency call connection. In this embodiment, the ADC is anchored to the DCMF. The method 1100 is exemplarily described below in conjunction with the various steps in FIG11.
S1101,UE向P-CSCF发送初始INVITE请求消息。对应地,P-CSCF接收来自UE的该初始INVITE请求消息。S1101, UE sends an initial INVITE request message to P-CSCF. Correspondingly, P-CSCF receives the initial INVITE request message from UE.
示例性地,UE向P-CSCF发送初始INVITE请求消息,以发起紧急呼叫。例如,UE在该初始INVITE请求消息中携带的被叫号码为紧急呼叫号码,或者,UE在该初始INVITE请求消息中携带紧急呼叫标识。Exemplarily, the UE sends an initial INVITE request message to the P-CSCF to initiate an emergency call. For example, the called number carried by the UE in the initial INVITE request message is an emergency call number, or the UE carries an emergency call identifier in the initial INVITE request message.
该初始INVITE请求消息还可以携带UE用于建立音视频通话的描述信息,以便建立UE和PSAP之间的音视频通话。The initial INVITE request message may also carry description information used by the UE to establish an audio or video call, so as to establish an audio or video call between the UE and the PSAP.
可选地,UE还可以在该初始INVITE请求消息中携带DC能力指示信息,以指示UE支持DC。例如,UE在INVITE请求消息的Contact头域中携带“+sip.app-subtype="webrtc-datachannel”,以用作于指示UE支持DC。可以理解的是,UE支持DC可以指的是UE支持建立数据通道,并通过数据通道获取DC App。Optionally, the UE may also carry DC capability indication information in the initial INVITE request message to indicate that the UE supports DC. For example, the UE carries "+sip.app-subtype="webrtc-datachannel" in the Contact header field of the INVITE request message to indicate that the UE supports DC. It can be understood that UE support for DC may mean that the UE supports establishing a data channel and obtaining the DC App through the data channel.
可选地,S1102,P-CSCF确定当前呼叫为紧急呼叫,且UE支持DC,触发S-CSCF。Optionally, S1102, the P-CSCF determines that the current call is an emergency call and the UE supports DC, and triggers the S-CSCF.
S1103,P-CSCF向S-CSCF发送初始INVITE请求消息。S1103, the P-CSCF sends an initial INVITE request message to the S-CSCF.
示例性地,P-CSCF接收来自UE的初始INVITE请求消息之后,确定当前呼叫为紧急呼叫,且UE支持DC。例如,P-CSCF根据被叫号码或初始INVITE请求消息中携带的紧急呼叫标识确定当前呼叫为紧急呼叫,以及根据初始INVITE请求消息中携带的DC能力指示信息确定UE支持DC,在这种情况下,P-CSCF触发S-CSCF,即P-CSCF在S1103将初始INVITE请求消息转发给S-CSCF。Exemplarily, after receiving the initial INVITE request message from the UE, the P-CSCF determines that the current call is an emergency call and that the UE supports DC. For example, the P-CSCF determines that the current call is an emergency call based on the called number or the emergency call identifier carried in the initial INVITE request message, and determines that the UE supports DC based on the DC capability indication information carried in the initial INVITE request message. In this case, the P-CSCF triggers the S-CSCF, that is, the P-CSCF forwards the initial INVITE request message to the S-CSCF at S1103.
可选地,S1104,S-CSCF确定当前呼叫为紧急呼叫且UE支持DC,先触发MMTel AS,再触发E-CSCF。Optionally, in S1104, the S-CSCF determines that the current call is an emergency call and the UE supports DC, and first triggers the MMTel AS and then triggers the E-CSCF.
示例性地,S-CSCF接收来自UE的初始INVITE请求消息之后,确定当前呼叫为紧急呼叫,且UE支持DC。具体方式可参考上述P-CSCF执行的方案,这里不再赘述。在确定当前呼叫为紧急呼叫且UE支持DC的情况下,则S-CSCF先将INVITE消息发送给MMTel AS(具体可见S1105),然后再将初始
INVITE请求消息转发给E-CSCF(具体可见S1108)。For example, after receiving the initial INVITE request message from the UE, the S-CSCF determines that the current call is an emergency call and the UE supports DC. The specific method can refer to the solution executed by the above P-CSCF, which will not be repeated here. If it is determined that the current call is an emergency call and the UE supports DC, the S-CSCF first sends the INVITE message to the MMTel AS (see S1105 for details), and then sends the initial The INVITE request message is forwarded to the E-CSCF (see S1108 for details).
S1105,S-CSCF将初始INVITE请求消息发给MMTel AS。对应地,MMTel AS接收来自S-CSCF的该初始INVITE请求消息。S1105, S-CSCF sends the initial INVITE request message to MMTel AS. Correspondingly, MMTel AS receives the initial INVITE request message from S-CSCF.
示例性地,确定当前呼叫为紧急呼叫且UE支持DC的情况下,则S-CSCF将INVITE消息发送给MMTel AS。Exemplarily, when it is determined that the current call is an emergency call and the UE supports DC, the S-CSCF sends an INVITE message to the MMTel AS.
可选地,S1106,MMTel AS确定不触发DC创建流程。Optionally, S1106, MMTel AS determines not to trigger the DC creation process.
示例性地,MMTel AS接收来自S-CSCF的初始INVITE请求消息之后,在MMTel AS确定UE支持DC,但当前呼叫为紧急呼叫,或初始INVITE请求消息中没有携带用于建立DC的描述信息,则MMTel AS确定不触发DC创建流程,即MMTel AS不触发DC呼叫事件上报。Exemplarily, after the MMTel AS receives the initial INVITE request message from the S-CSCF, the MMTel AS determines that the UE supports DC, but the current call is an emergency call, or the initial INVITE request message does not carry descriptive information for establishing a DC, then the MMTel AS determines not to trigger the DC creation process, that is, the MMTel AS does not trigger a DC call event report.
S1107,MMTel AS向S-CSCF发送初始INVITE请求消息。对应地,S-CSCF接收来自MMTel的初始INVITE请求消息。S1107, MMTel AS sends an initial INVITE request message to S-CSCF. Correspondingly, S-CSCF receives the initial INVITE request message from MMTel.
示例性地,在MMTel AS确定不触发DC创建流程的情况下,MMTel AS继续转发初始INVITE请求消息给S-CSCF。Exemplarily, when the MMTel AS determines not to trigger the DC creation process, the MMTel AS continues to forward the initial INVITE request message to the S-CSCF.
S1108,S-CSCF向E-CSCF发送初始INVITE请求消息。对应地,E-CSCF接收来自S-CSCF的该初始INVITE请求消息。S1108, the S-CSCF sends an initial INVITE request message to the E-CSCF. Correspondingly, the E-CSCF receives the initial INVITE request message from the S-CSCF.
示例性地,S-CSCF在S1104确定触发E-CSCF,则S-CSCF向E-CSCF发送初始INVITE请求消息。Exemplarily, the S-CSCF determines to trigger the E-CSCF at S1104, and the S-CSCF sends an initial INVITE request message to the E-CSCF.
对应地,E-CSCF接收来自S-CSCF的初始INVITE请求消息之后,根据被叫号码以及UE的位置信息等为UE选择PSAP,完成紧急呼叫的号码变换和路由处理,具体过程本申请不作限定。Correspondingly, after receiving the initial INVITE request message from the S-CSCF, the E-CSCF selects a PSAP for the UE according to the called number and the location information of the UE, and completes the number conversion and routing processing of the emergency call. The specific process is not limited in this application.
S1109a,UE和PSAP之间建立IMS会话。S1109a: An IMS session is established between the UE and the PSAP.
示例性地,UE和PSAP之间建立了IMS会话,即UE与PSAP之间的电话接通。Exemplarily, an IMS session is established between the UE and the PSAP, that is, a call between the UE and the PSAP is connected.
S1109b,PSAP向UE发送摘机200OK响应消息。对应地,UE接收来自PSAP的该摘机200OK响应消息。S1109b, the PSAP sends an off-hook 200 OK response message to the UE. Correspondingly, the UE receives the off-hook 200 OK response message from the PSAP.
示例性地,PSAP摘机后,与UE进入通话(即UE和PSAP之间的IMS会话建立完成)。则PSAP向UE发送摘机200OK响应消息,以指示PSAP与UE之间的IMS会话建立成功。此时UE与PSAP之间可以通过建立好的IMS会话进行音视频通话。Exemplarily, after the PSAP goes off-hook, it enters into a call with the UE (i.e., the IMS session between the UE and the PSAP is established). The PSAP then sends an off-hook 200 OK response message to the UE to indicate that the IMS session between the PSAP and the UE is successfully established. At this point, the UE and the PSAP can conduct an audio and video call through the established IMS session.
进一步地,UE请求建立BDC和ADC。下面结合S1110-S1125对BDC和ADC的创建流程进行示例性说明。Furthermore, the UE requests to establish a BDC and an ADC. The following is an exemplary description of the process of establishing a BDC and an ADC in conjunction with S1110-S1125.
S1110,UE向P-CSCF发送re-invite请求消息。对应地,P-CSCF接收来自UE的该re-invite请求消息。S1110, the UE sends a re-invite request message to the P-CSCF. Correspondingly, the P-CSCF receives the re-invite request message from the UE.
示例性地,UE在确定与PSAP之间的紧急通话接通之后,向P-CSCF发送re-invite请求消息,以请求协商建立BDC和ADC。该re-invite请求消息包括BDC SDP offer#1和ADC SDP offer#1。其中,该BDC SDP offer#1为UE用于建立BDC的描述信息,如UE用于对接BDC的IP地址、端口信息、TLS ID和证书、QoS需求等。Exemplarily, after the UE determines that the emergency call with the PSAP is connected, it sends a re-invite request message to the P-CSCF to request negotiation to establish the BDC and ADC. The re-invite request message includes BDC SDP offer#1 and ADC SDP offer#1. Among them, the BDC SDP offer#1 is the description information used by the UE to establish the BDC, such as the IP address, port information, TLS ID and certificate, QoS requirements, etc. used by the UE to connect to the BDC.
可以理解的是,UE也可以在S1101的初始INVITE请求消息中携带BDC SDP offer#1和ADC SDP offer#1。在这种情况下,UE可以不再在S1110的re-invite请求消息中携带BDC SDP offer#1和ADC SDP offer#1。It is understandable that the UE may also carry BDC SDP offer#1 and ADC SDP offer#1 in the initial INVITE request message of S1101. In this case, the UE may no longer carry BDC SDP offer#1 and ADC SDP offer#1 in the re-invite request message of S1110.
作为一种可能的示例,下面给出了一种UE在re-invite请求消息中携带的BDC SDP offer#1和ADC SDP offer#1的示例:As a possible example, the following is an example of BDC SDP offer#1 and ADC SDP offer#1 carried by the UE in the re-invite request message:
v=0v=0
o=-0 1IN IP4 58.60.100.114o=-0 1IN IP4 58.60.100.114
s=SBC calls=SBC call
c=IN IP4 135.215.6.221c=IN IP4 135.215.6.221
b=CT:4096b=CT:4096
t=0 0t=0 0
m=audio 15012 RTP/AVP 107m=audio 15012 RTP/AVP 107
b=AS:80b=AS:80
b=RR:1837b=RR:1837
b=RS:612b=RS:612
a=rtpmap:107 AMR-WB/16000
a=rtpmap:107 AMR-WB/16000
a=fmtp:107 mode-set=7a=fmtp:107 mode-set=7
a=sendrecva=sendrecv
m=application 15014 UDP/DTLS/SCTP webrtc-datachannelm=application 15014 UDP/DTLS/SCTP webrtc-datachannel
b=AS:500b=AS:500
a=max-message-size:1024a=max-message-size:1024
a=sctp-port:5000a=sctp-port:5000
a=setup:passivea=setup:passive
a=fingerprint:SHA-1 4A:AD:B9:B1:3F:82:18:3B:54:02:12:DF:3E:5D:49:6B:19:E5:7C:ABa=fingerprint:SHA-1 4A:AD:B9:B1:3F:82:18:3B:54:02:12:DF:3E:5D:49:6B:19:E5:7C:AB
a=tls-id:abc3de65cddef001be82a=tls-id:abc3de65cddef001be82
a=dcmap:0subprotocol="http"a=dcmap:0subprotocol="http"
a=dcmap:1000max-time=150;label="low latency"a=dcmap:1000max-time=150;label="low latency"
需要说明的是,在上述示例中,“m=application”所在行的“webrtc-datachannel”表示该m行是DC通道的媒体行;“a=dcmap:0”表示BDC,“a=dcmap:1000”表示ADC。因此,在上述示例中,BDC和ADC共用相同的描述信息。UE通过这种方式可以隐性指示ADC需要锚定到DCMF。其中,ADC锚定到DCMF指的是UE建立与DCMF之间的ADC。It should be noted that in the above example, "webrtc-datachannel" in the row where "m=application" is located indicates that the m row is the media row of the DC channel; "a=dcmap:0" indicates BDC, and "a=dcmap:1000" indicates ADC. Therefore, in the above example, BDC and ADC share the same description information. In this way, the UE can implicitly indicate that the ADC needs to be anchored to the DCMF. Among them, the ADC anchoring to the DCMF means that the UE establishes an ADC with the DCMF.
S1111,P-CSCF向S-CSCF发送re-invite请求消息。对应地,S-CSCF接收来自P-CSCF的re-invite请求消息。S1111, the P-CSCF sends a re-invite request message to the S-CSCF. Correspondingly, the S-CSCF receives the re-invite request message from the P-CSCF.
示例性地,P-CSCF接收来自UE的re-invite请求消息之后,根据初始INVITE请求消息的路由,将re-INVITE请求消息转发给S-CSCF。Exemplarily, after receiving the re-invite request message from the UE, the P-CSCF forwards the re-INVITE request message to the S-CSCF according to the route of the initial INVITE request message.
S1112,S-CSCF向MMTel AS发送re-invite请求消息。对应地,MMTel AS接收来自S-CSCF的re-invite请求消息。S1112, S-CSCF sends a re-invite request message to MMTel AS. Correspondingly, MMTel AS receives the re-invite request message from S-CSCF.
示例性地,S-CSCF接收来自UE的re-invite请求消息之后,根据初始INVITE请求消息的路由,将re-INVITE请求消息转发给MMTel AS。Exemplarily, after receiving the re-invite request message from the UE, the S-CSCF forwards the re-INVITE request message to the MMTel AS according to the routing of the initial INVITE request message.
可选地,S1113,MMTel AS确定触发DC创建流程。Optionally, S1113, MMTel AS determines to trigger the DC creation process.
示例性地,MMTel AS接收来自S-CSCF的re-invite请求消息之后,在发现该re-invite请求消息携带有DC描述信息(即上述BDC SDP offer#1和ADC SDP offer#1),并确定UE支持DC(可以是在初始INVITE流程确定UE支持DC,也可以是根据re-invite请求消息携带的DC能力指示信息确定UE支持DC)的情况下,确定触发DC创建流程,即则触发DC呼叫事件上报(具体可见S1114)。Exemplarily, after receiving the re-invite request message from the S-CSCF, the MMTel AS determines to trigger the DC creation process, i.e., trigger the DC call event report (see S1114 for details), if it finds that the re-invite request message carries DC description information (i.e., the BDC SDP offer#1 and ADC SDP offer#1 mentioned above) and determines that the UE supports DC (it can be determined that the UE supports DC in the initial INVITE process, or it can be determined that the UE supports DC based on the DC capability indication information carried in the re-invite request message).
S1114,MMTel AS向DCSF发送DC活动通知(DC event notify)消息。对应地,DCSF接收来自MMTel AS的该DC活动通知消息。S1114, MMTel AS sends a DC event notify message to DCSF. Correspondingly, DCSF receives the DC event notify message from MMTel AS.
示例性地,MMTel AS向DCSF发送DC活动通知消息,以上报紧急呼叫的DC呼叫事件给DCSF。Exemplarily, the MMTel AS sends a DC activity notification message to the DCSF to report the DC call event of the emergency call to the DCSF.
S1115,DCSF向MMTel AS发送DC控制请求(DC control request)消息。对应地,MMTel AS接收来自DCMF的该DC控制请求消息。S1115, DCSF sends a DC control request message to MMTel AS. Correspondingly, MMTel AS receives the DC control request message from DCMF.
示例性地,DCSF收到MMTel AS上报的DC呼叫事件之后,确定当前呼叫为紧急呼叫,且ADC需要锚定到DCMF,则DCSF向MMTel AS下发DC控制请求消息,以申请BDC和ADC通道资源。For example, after DCSF receives the DC call event reported by MMTel AS, it determines that the current call is an emergency call and the ADC needs to be anchored to DCMF. Then, DCSF sends a DC control request message to MMTel AS to apply for BDC and ADC channel resources.
S1116,MMTel AS向DCMF发送资源请求消息。对应地,DCMF接收来自MMTel AS的该资源请求消息。S1116, MMTel AS sends a resource request message to DCMF. Correspondingly, DCMF receives the resource request message from MMTel AS.
示例性地,MMTel AS接收来自DCSF的DC控制请求消息之后,向DCMF申请BDC和ADC通道资源。例如,MMTel AS向DCMF发送资源请求消息,该资源请求消息包括BDC SDP offer#1和ADC SDP offer#1,该资源请求消息用于请求获取DCMF用于创建BDC和ADC的描述信息。Exemplarily, after receiving the DC control request message from DCSF, MMTel AS applies to DCMF for BDC and ADC channel resources. For example, MMTel AS sends a resource request message to DCMF, the resource request message including BDC SDP offer#1 and ADC SDP offer#1, and the resource request message is used to request DCMF to obtain description information for creating BDC and ADC.
S1117,DCMF向MMTel AS发送资源响应消息。对应地,MMTel AS接收来自DCMF的该资源响应消息。S1117, DCMF sends a resource response message to MMTel AS. Correspondingly, MMTel AS receives the resource response message from DCMF.
示例性地,接收来自MMTel AS的资源请求消息之后,DCMF基于BDC SDP offer#1和ADC SDP offer#1进行媒体协商,确定用于创建UE和DCMF之间的BDC(记为BDC#1)和ADC(记为ADC#1)的描述信息,并分配用于创建PSAP和DCMF之间的BDC(记为BDC#2)和ADC(记为ADC#2)的描述信息。Exemplarily, after receiving the resource request message from the MMTel AS, DCMF performs media negotiation based on BDC SDP offer#1 and ADC SDP offer#1, determines the description information for creating the BDC (denoted as BDC#1) and ADC (denoted as ADC#1) between the UE and DCMF, and allocates the description information for creating the BDC (denoted as BDC#2) and ADC (denoted as ADC#2) between the PSAP and DCMF.
进一步地,DCMF向MMTel AS发送资源响应消息,该资源响应消息包括BDC SDP answer#1、ADC SDP answer#1、BDC SDP offer#2和ADC SDP offer#2。其中,BDC SDP answer#1为DCMF协商确定的用
于创建UE和DCMF之间的BDC#1的描述信息,ADC SDP answer#1为DCMF协商确定的用于创建UE和DCMF之间的ADC#1的描述信息;BDC SDP offer#2为DCMF分配的用于创建PSAP和DCMF之间的BDC#2的描述信息,ADC SDP offer#2为DCMF分配的用于创建PSAP和DCMF之间的ADC#2的描述信息。Furthermore, DCMF sends a resource response message to MMTel AS, and the resource response message includes BDC SDP answer#1, ADC SDP answer#1, BDC SDP offer#2, and ADC SDP offer#2. Among them, BDC SDP answer#1 is the user defined by DCMF through negotiation. The ADC SDP answer#1 is the description information for creating BDC#1 between the UE and DCMF, and the ADC SDP answer#1 is the description information for creating ADC#1 between the UE and DCMF determined by DCMF negotiation; the BDC SDP offer#2 is the description information for creating BDC#2 between the PSAP and DCMF allocated by DCMF, and the ADC SDP offer#2 is the description information for creating ADC#2 between the PSAP and DCMF allocated by DCMF.
S1118,MMTel AS向S-CSCF发送re-invite请求消息。对应地,S-CSCF接收来自MMTel AS的re-invite请求消息。S1118, MMTel AS sends a re-invite request message to S-CSCF. Correspondingly, S-CSCF receives the re-invite request message from MMTel AS.
示例性地,MMTel AS接收来自DCMF的资源响应消息之后,向S-CSCF发送re-invite请求消息,并在该re-invite请求消息中携带BDC SDP offer#2和ADC SDP offer#2,以协商DCMF和PSAP之间的BDC#2和ADC#2的描述信息。Exemplarily, after receiving the resource response message from DCMF, MMTel AS sends a re-invite request message to S-CSCF, and carries BDC SDP offer#2 and ADC SDP offer#2 in the re-invite request message to negotiate the description information of BDC#2 and ADC#2 between DCMF and PSAP.
S1119,S-CSCF通过E-CSCF向PSAP发送re-invite请求消息。对应地,PSAP通过E-CSCF接收来自S-CSCF的该re-invite请求消息。S1119, the S-CSCF sends a re-invite request message to the PSAP through the E-CSCF. Correspondingly, the PSAP receives the re-invite request message from the S-CSCF through the E-CSCF.
示例性地,S-CSCF接收来自MMTel AS的re-invite请求消息之后,通过E-CSCF将该re-invite请求消息转发给PSAP。Exemplarily, after receiving the re-invite request message from the MMTel AS, the S-CSCF forwards the re-invite request message to the PSAP through the E-CSCF.
可以理解的是,该re-invite请求消息包括BDC SDP offer#2和ADC SDP offer#2。该BDC SDP offer#2和ADC SDP offer#2的示例可参考S1110部分介绍的BDC SDP offer#1和ADC SDP offer#1的示例,这里不再赘述。It is understandable that the re-invite request message includes BDC SDP offer#2 and ADC SDP offer#2. The examples of BDC SDP offer#2 and ADC SDP offer#2 can refer to the examples of BDC SDP offer#1 and ADC SDP offer#1 introduced in S1110, which will not be repeated here.
S1120,PSAP通过S-CSCF向MMTel AS发送200响应消息。对应地,MMTel AS通过S-CSCF接收来自PSAP的该200响应消息。S1120, PSAP sends a 200 response message to MMTel AS through S-CSCF. Correspondingly, MMTel AS receives the 200 response message from PSAP through S-CSCF.
示例性地,PSAP接收到re-invite请求消息之后,根据该re-invite请求消息中携带的描述信息完成媒体协商,然后通过S-CSCF向MMTel AS发送200响应消息,该200响应消息中携带BDC SDP answer#2和ADC SDP answer#2,其中,该BDC SDP answer#2为PSAP协商确定的用于建立PSAP和DCMF之间的BDC#2的描述信息,该ADC SDP answer#2为PSAP协商确定的用于建立PSAP和DCMF之间的ADC#2的描述信息。Exemplarily, after receiving the re-invite request message, the PSAP completes the media negotiation according to the description information carried in the re-invite request message, and then sends a 200 response message to the MMTel AS through the S-CSCF. The 200 response message carries BDC SDP answer#2 and ADC SDP answer#2, wherein the BDC SDP answer#2 is the description information of BDC#2 determined by the PSAP negotiation for establishing the connection between the PSAP and the DCMF, and the ADC SDP answer#2 is the description information of ADC#2 determined by the PSAP negotiation for establishing the connection between the PSAP and the DCMF.
S1121,MMTel AS向DCMF发送BDC SDP answer#2和ADC SDP answer#2。对应地,DCMF接收来自MMTel AS的BDC SDP answer#2和ADC SDP answer#2。S1121, MMTel AS sends BDC SDP answer#2 and ADC SDP answer#2 to DCMF. Correspondingly, DCMF receives BDC SDP answer#2 and ADC SDP answer#2 from MMTel AS.
示例性地,MMTel AS接收来自PSAP的200响应消息之后,从该200响应消息中获取BDC SDP answer#2和ADC SDP answer#2,然后将该BDC SDP answer#2和ADC SDP answer#2发送给DCMF,完成PSAP和DCMF之间的BDC#2和ADC#2的媒体协商。Exemplarily, after receiving the 200 response message from the PSAP, the MMTel AS obtains the BDC SDP answer#2 and the ADC SDP answer#2 from the 200 response message, and then sends the BDC SDP answer#2 and the ADC SDP answer#2 to the DCMF to complete the media negotiation of BDC#2 and ADC#2 between the PSAP and the DCMF.
S1122,MMTel AS向S-CSCF发送200响应消息。对应地,S-CSCF接收来自MMTel AS的该200响应消息。S1122, the MMTel AS sends a 200 response message to the S-CSCF. Correspondingly, the S-CSCF receives the 200 response message from the MMTel AS.
示例性地,MMTel AS接收来自DCMF的资源响应消息之后,从该资源响应消息中获取BDC SDP answer#1和ADC SDP answer#1,然后向S-CSCF发送200响应消息,并在该200响应消息中携带该BDC SDP answer#1和ADC SDP answer#1。Exemplarily, after receiving the resource response message from DCMF, MMTel AS obtains BDC SDP answer#1 and ADC SDP answer#1 from the resource response message, and then sends a 200 response message to S-CSCF, and carries the BDC SDP answer#1 and ADC SDP answer#1 in the 200 response message.
可以理解的是,本申请不限定MMTel AS执行S1118和S1122的先后顺序。It is understandable that this application does not limit the order in which MMTel AS executes S1118 and S1122.
S1123,S-CSCF通过P-CSCF向UE发送200响应消息。对应地,UE通过P-CSCF接收来自S-CSCF的该200响应消息。S1123, the S-CSCF sends a 200 response message to the UE via the P-CSCF. Correspondingly, the UE receives the 200 response message from the S-CSCF via the P-CSCF.
示例性地,S-CSCF接收来自MMTel AS的200响应消息之后,通过P-CSCF将该200响应消息转发给UE。UE从该200响应消息中获取BDC SDP answer#1和ADC SDP answer#1,从而完成UE和DCMF之间的BDC#1和ADC#1的媒体协商。Exemplarily, after receiving the 200 response message from the MMTel AS, the S-CSCF forwards the 200 response message to the UE through the P-CSCF. The UE obtains the BDC SDP answer#1 and ADC SDP answer#1 from the 200 response message, thereby completing the media negotiation of BDC#1 and ADC#1 between the UE and the DCMF.
S1124,DCMF和UE之间建立BDC#1和ADC#1。S1124, BDC#1 and ADC#1 are established between the DCMF and the UE.
S1125,DCMF和PSAP之间建立BDC#2和ADC#2。S1125, BDC#2 and ADC#2 are established between DCMF and PSAP.
经过上述描述信息协商流程,DCMF分别完成和主叫UE、PSAP之间的BDC和ADC的建立。After the above description information negotiation process, DCMF completes the establishment of BDC and ADC with the calling UE and PSAP respectively.
进一步地,UE和PSAP可以通过建立好的BDC获取DC App,然后UE上的DC App和PSAP上的DC App可以通过建立好的ADC传输信息。下面结合S1126-S1131进行示例性说明。Furthermore, the UE and the PSAP can obtain the DC App through the established BDC, and then the DC App on the UE and the DC App on the PSAP can transmit information through the established ADC. The following is an exemplary description in conjunction with S1126-S1131.
S1126,UE通过BDC#1从DCMF获取DC App,具体过程本申请不作限定。这里的DC App例如可以是紧急呼叫小程序。S1126, UE obtains DC App from DCMF through BDC#1, and the specific process is not limited in this application. The DC App here can be, for example, an emergency call applet.
S1127,PSAP通过BDC#2从DCMF获取DC App。可以理解的是,PSAP获取的DC App与UE获取的DC App应相同。
S1127, PSAP obtains DC App from DCMF via BDC#2. It can be understood that the DC App obtained by PSAP should be the same as the DC App obtained by UE.
S1128,UE上的DC App通过ADC#1向DCMF发送数据#1,如图片、视频、位置等数据。S1128, the DC App on the UE sends data #1, such as pictures, videos, locations, and other data, to the DCMF through ADC #1.
S1129,DCMF通过ADC#2向PSAP上的DC App发送数据#1。S1129, DCMF sends data #1 to DC App on PSAP through ADC #2.
S1130,PSAP上的DC App通过ADC#2向DCMF发送数据#2。S1130, DC App on PSAP sends data #2 to DCMF via ADC #2.
S1131,DCMF通过ADC#1向UE上的DC App发送数据#2。S1131, DCMF sends data #2 to DC App on UE through ADC #1.
通过上述过程,UE和PSAP可以在下载的DC App内通过建立好的ADC通道传输图片、视频、位置等数据。Through the above process, UE and PSAP can transmit pictures, videos, location and other data through the established ADC channel in the downloaded DC App.
图12示出了一种适用于图10所示的网络架构的另一种方法1200的示例性流程图。在方法1200中,UE在与PSAP之间的紧急通话建立完成之后,同时发起BDC和ADC创建流程,以减少紧急通话接通的时延。并且在该实施例中,ADC不锚定到DCMF。下面结合图12中的各个步骤对方法1200做示例性说明。FIG. 12 shows an exemplary flow chart of another method 1200 applicable to the network architecture shown in FIG. 10 . In method 1200 , after the emergency call between the UE and the PSAP is established, the UE simultaneously initiates the BDC and ADC creation processes to reduce the delay of the emergency call connection. In this embodiment, the ADC is not anchored to the DCMF. The method 1200 is exemplarily described below in conjunction with the various steps in FIG. 12 .
在S1201-S1209b中,UE通过初始INVITE流程发起紧急呼叫,与PSAP之间建立了IMS会话。具体过程可参考方法1100中S1101-S1109b部分的描述,为了简洁,这里不再重复说明。In S1201-S1209b, the UE initiates an emergency call through the initial INVITE process and establishes an IMS session with the PSAP. The specific process can be referred to the description of S1101-S1109b in method 1100, and will not be repeated here for the sake of brevity.
进一步地,UE请求建立BDC和ADC。下面结合S1210-S1225对BDC和ADC的创建流程进行示例性说明。Furthermore, the UE requests to establish a BDC and an ADC. The following is an exemplary description of the creation process of the BDC and the ADC in conjunction with S1210-S1225.
S1210,UE向P-CSCF发送re-invite请求消息。对应地,P-CSCF接收来自UE的该re-invite请求消息。S1210, the UE sends a re-invite request message to the P-CSCF. Correspondingly, the P-CSCF receives the re-invite request message from the UE.
示例性地,UE在确定与PSAP之间的紧急通话接通之后,向P-CSCF发送re-invite请求消息,以请求协商建立BDC和ADC。该re-invite请求消息包括BDCSDP offer#1和ADC SDP offer#1。其中,该BDC SDP offer#1为UE用于建立BDC的描述信息,如UE用于对接BDC的IP地址、端口信息、TLS ID和证书、QoS需求等。Exemplarily, after confirming that the emergency call with the PSAP is connected, the UE sends a re-invite request message to the P-CSCF to request negotiation to establish the BDC and ADC. The re-invite request message includes BDC SDP offer#1 and ADC SDP offer#1. Among them, the BDC SDP offer#1 is the description information used by the UE to establish the BDC, such as the IP address, port information, TLS ID and certificate, QoS requirements, etc. used by the UE to connect to the BDC.
可以理解的是,UE也可以在S1201的初始INVITE请求消息中携带BDC SDP offer#1和ADC SDP offer#1。在这种情况下,UE可以不再在S1210的re-invite请求消息中携带BDC SDP offer#1和ADC SDP offer#1。It is understandable that the UE may also carry BDC SDP offer#1 and ADC SDP offer#1 in the initial INVITE request message of S1201. In this case, the UE may no longer carry BDC SDP offer#1 and ADC SDP offer#1 in the re-invite request message of S1210.
作为一种可能的示例,下面给出了一种UE在re-invite请求消息中携带的BDC SDP offer#1和ADC SDP offer#1的示例:As a possible example, the following is an example of BDC SDP offer#1 and ADC SDP offer#1 carried by the UE in the re-invite request message:
v=0v=0
o=-0 1IN IP4 58.60.100.114o=-0 1IN IP4 58.60.100.114
s=SBC calls=SBC call
c=IN IP4 135.215.6.221c=IN IP4 135.215.6.221
b=CT:4096b=CT:4096
t=0 0t=0 0
m=audio 15012 RTP/AVP 107m=audio 15012 RTP/AVP 107
b=AS:80b=AS:80
b=RR:1837b=RR:1837
b=RS:612b=RS:612
a=rtpmap:107 AMR-WB/16000a=rtpmap:107 AMR-WB/16000
a=fmtp:107 mode-set=7a=fmtp:107 mode-set=7
a=sendrecva=sendrecv
m=application 15014 UDP/DTLS/SCTP webrtc-datachannelm=application 15014 UDP/DTLS/SCTP webrtc-datachannel
b=AS:500b=AS:500
a=max-message-size:1024a=max-message-size:1024
a=sctp-port:5000a=sctp-port:5000
a=setup:passivea=setup:passive
a=fingerprint:SHA-1 4A:AD:B9:B1:3F:82:18:3B:54:02:12:DF:3E:5D:49:6B:19:E5:7C:ABa=fingerprint:SHA-1 4A:AD:B9:B1:3F:82:18:3B:54:02:12:DF:3E:5D:49:6B:19:E5:7C:AB
a=tls-id:abc3de65cddef001be82a=tls-id:abc3de65cddef001be82
a=dcmap:0 subprotocol="http"a=dcmap:0 subprotocol="http"
m=application 15016 UDP/DTLS/SCTP webrtc-datachannelm=application 15016 UDP/DTLS/SCTP webrtc-datachannel
b=AS:500
b=AS:500
a=max-message-size:1024a=max-message-size:1024
a=sctp-port:5000a=sctp-port:5000
a=setup:passivea=setup:passive
a=fingerprint:SHA-1 4A:AD:B9:B1:3F:82:18:3B:54:02:12:DF:3E:5D:49:6B:19:E5:7C:ABa=fingerprint:SHA-1 4A:AD:B9:B1:3F:82:18:3B:54:02:12:DF:3E:5D:49:6B:19:E5:7C:AB
a=tls-id:abc3de65cddef001be82a=tls-id:abc3de65cddef001be82
a=dcmap:1000 max-time=150;label="low latency"a=dcmap:1000 max-time=150;label="low latency"
需要说明的是,在上述示例中,“m=application”所在行的“webrtc-datachannel”表示该m行是DC通道的媒体行;“a=dcmap:0”表示BDC,“a=dcmap:1000”表示ADC。因此,在上述示例中,BDC和ADC使用的是不同的描述信息。UE通过这种方式可以隐性指示ADC不锚定到DCMF。其中,ADC不锚定到DCMF指的是UE直接建立与PSAP之间的ADC。It should be noted that in the above example, "webrtc-datachannel" in the row where "m=application" is located indicates that the m row is the media row of the DC channel; "a=dcmap:0" indicates BDC, and "a=dcmap:1000" indicates ADC. Therefore, in the above example, BDC and ADC use different description information. In this way, the UE can implicitly indicate that the ADC is not anchored to the DCMF. Among them, the ADC is not anchored to the DCMF means that the UE directly establishes the ADC with the PSAP.
S1211,P-CSCF向S-CSCF发送re-invite请求消息,该re-invite请求消息包括BDC SDP offer#1和ADC SDP offer#1。对应地,S-CSCF接收来自P-CSCF的re-invite请求消息。S1211, P-CSCF sends a re-invite request message to S-CSCF, where the re-invite request message includes BDC SDP offer#1 and ADC SDP offer#1. Correspondingly, S-CSCF receives the re-invite request message from P-CSCF.
S1212,S-CSCF向MMTel AS发送re-invite请求消息,该re-invite请求消息包括BDC SDP offer#1和ADC SDP offer#1。对应地,MMTel AS接收来自S-CSCF的re-invite请求消息。S1212, S-CSCF sends a re-invite request message to MMTel AS, where the re-invite request message includes BDC SDP offer#1 and ADC SDP offer#1. Correspondingly, MMTel AS receives the re-invite request message from S-CSCF.
可选地,S1213,MMTel AS确定触发DC创建流程。Optionally, S1213, MMTel AS determines to trigger the DC creation process.
S1211-S1213与方法1100中的S1111-S113类似,区别在于re-invite请求消息中携带的描述信息不同。为了简洁,这里不再赘述。S1211-S1213 are similar to S1111-S113 in method 1100, except that the description information carried in the re-invite request message is different, which will not be described here for brevity.
S1214,MMTel AS向DCSF发送DC活动通知(DC event notify)消息,以上报紧急呼叫的DC呼叫事件给DCSF。对应地,DCSF接收来自MMTel AS的该DC活动通知消息。S1214, MMTel AS sends a DC event notify message to DCSF to report the DC call event of the emergency call to DCSF. Correspondingly, DCSF receives the DC event notify message from MMTel AS.
S1215,DCSF向发送DC控制请求(DC control request)消息。对应地,DC接收来自DCMF的该DC控制请求消息。S1215, DCSF sends a DC control request message to DC. Correspondingly, DC receives the DC control request message from DCMF.
示例性地,DCSF收到MMTel AS上报的DC呼叫事件之后,确定当前呼叫为紧急呼叫,且ADC不锚定到DCMF,则DCSF向MMTel AS下发DC控制请求消息,以申请BDC通道资源(不需要申请ADC通道资源)。For example, after DCSF receives the DC call event reported by MMTel AS, it determines that the current call is an emergency call and the ADC is not anchored to DCMF. Then, DCSF sends a DC control request message to MMTel AS to apply for BDC channel resources (no need to apply for ADC channel resources).
S1216,MMTel AS向DCMF发送资源请求消息。对应地,DCMF接收来自MMTel AS的该资源请求消息。S1216, MMTel AS sends a resource request message to DCMF. Correspondingly, DCMF receives the resource request message from MMTel AS.
示例性地,MMTel AS接收来自DCMF的DC控制请求消息之后,向DCMF申请BDC通道资源。例如,MMTel AS向DCMF发送资源请求消息,该资源请求消息包括BDC SDP offer#1,该资源请求消息用于请求获取DCMF用于创建BDC的描述信息。Exemplarily, after receiving the DC control request message from the DCMF, the MMTel AS applies to the DCMF for BDC channel resources. For example, the MMTel AS sends a resource request message to the DCMF, the resource request message including the BDC SDP offer#1, and the resource request message is used to request the DCMF to obtain the description information used to create the BDC.
S1217,DCMF向MMTel AS发送资源响应消息。对应地,MMTel AS接收来自DCMF的该资源响应消息。S1217, DCMF sends a resource response message to MMTel AS. Correspondingly, MMTel AS receives the resource response message from DCMF.
示例性地,接收来自MMTel AS的资源请求消息之后,DCMF基于BDC SDP offer#1进行媒体协商,确定用于创建UE和DCMF之间的BDC(记为BDC#1)的描述信息,并分配用于创建PSAP和DCMF之间的BDC(记为BDC#2)和ADC(记为ADC#2)的描述信息。Exemplarily, after receiving the resource request message from the MMTel AS, DCMF performs media negotiation based on BDC SDP offer#1, determines the description information for creating the BDC (denoted as BDC#1) between the UE and DCMF, and allocates the description information for creating the BDC (denoted as BDC#2) and ADC (denoted as ADC#2) between the PSAP and DCMF.
进一步地,DCMF向MMTel AS发送资源响应消息,该资源响应消息包括BDC SDP answer#1和BDC SDP offer#2。其中,BDC SDP answer#1为DCMF协商确定的用于创建UE和DCMF之间的BDC#1的描述信息;BDC SDP offer#2为DCMF分配的用于创建PSAP和DCMF之间的BDC#2的描述信息。Further, DCMF sends a resource response message to MMTel AS, which includes BDC SDP answer#1 and BDC SDP offer#2. BDC SDP answer#1 is the description information of BDC#1 determined by DCMF negotiation for establishing BDC#1 between UE and DCMF; BDC SDP offer#2 is the description information of BDC#2 allocated by DCMF for establishing BDC#2 between PSAP and DCMF.
S1218,MMTel AS向S-CSCF发送re-invite请求消息。对应地,S-CSCF接收来自MMTel AS的re-invite请求消息。S1218, MMTel AS sends a re-invite request message to S-CSCF. Correspondingly, S-CSCF receives the re-invite request message from MMTel AS.
示例性地,MMTel AS接收来自DCMF的资源响应消息之后,向S-CSCF发送re-invite请求消息,并在该re-invite请求消息中携带ADC SDP offer#1和BDC SDP offer#2,以协商UE和PSAP之间的ADC#1的描述信息,以及DCMF和PSAP之间的BDC#2的描述信息。Exemplarily, after receiving the resource response message from DCMF, the MMTel AS sends a re-invite request message to the S-CSCF, and carries ADC SDP offer#1 and BDC SDP offer#2 in the re-invite request message to negotiate the description information of ADC#1 between the UE and PSAP, and the description information of BDC#2 between the DCMF and PSAP.
作为一种可能的示例,下面给出一种MMTel AS在re-invite请求消息中携带的BDC SDP offer#2和ADC SDP offer#1的示例:As a possible example, the following is an example of BDC SDP offer#2 and ADC SDP offer#1 carried by the MMTel AS in the re-invite request message:
v=0v=0
o=-0 1 IN IP4 58.60.100.114o=-0 1 IN IP4 58.60.100.114
s=SBC calls=SBC call
b=CT:4096
b=CT:4096
t=0 0t=0 0
m=audio 15012 RTP/AVP 107m=audio 15012 RTP/AVP 107
b=AS:80b=AS:80
b=RR:1837b=RR:1837
b=RS:612b=RS:612
a=rtpmap:107 AMR-WB/16000a=rtpmap:107 AMR-WB/16000
a=fmtp:107 mode-set=7a=fmtp:107 mode-set=7
a=sendrecva=sendrecv
m=application 15018 UDP/DTLS/SCTP webrtc-datachannelm=application 15018 UDP/DTLS/SCTP webrtc-datachannel
c=IN IP4 135.215.6.222c=IN IP4 135.215.6.222
b=AS:500b=AS:500
a=max-message-size:1024a=max-message-size:1024
a=sctp-port:5000a=sctp-port:5000
a=setup:passivea=setup:passive
a=fingerprint:SHA-1 4A:AD:B9:B1:3F:82:18:3B:54:02:12:DF:3E:5D:49:6B:19:E5:7C:ABa=fingerprint:SHA-1 4A:AD:B9:B1:3F:82:18:3B:54:02:12:DF:3E:5D:49:6B:19:E5:7C:AB
a=tls-id:abc3de65cddef001be82a=tls-id:abc3de65cddef001be82
a=dcmap:0s ubprotocol="http"a=dcmap:0s ubprotocol="http"
m=application 15020 UDP/DTLS/SCTP webrtc-datachannelm=application 15020 UDP/DTLS/SCTP webrtc-datachannel
c=IN IP4 135.215.6.221c=IN IP4 135.215.6.221
b=AS:500b=AS:500
a=max-message-size:1024a=max-message-size:1024
a=sctp-port:5000a=sctp-port:5000
a=setup:passivea=setup:passive
a=fingerprint:SHA-1 4A:AD:B9:B1:3F:82:18:3B:54:02:12:DF:3E:5D:49:6B:19:E5:7C:ABa=fingerprint:SHA-1 4A:AD:B9:B1:3F:82:18:3B:54:02:12:DF:3E:5D:49:6B:19:E5:7C:AB
a=tls-id:abc3de65cddef001be82a=tls-id:abc3de65cddef001be82
a=dcmap:1000 max-time=150;label="low latency"a=dcmap:1000 max-time=150;label="low latency"
需要说明的是,在上述示例中,“a=dcmap:0”表示BDC,“a=dcmap:1000”表示ADC#1,因此,第一个“m=application”所在行的“webrtc-datachannel”表示该m行是BDC#2的媒体行,第二个“m=application”所在行的“webrtc-datachannel”表示该m行是ADC#1的媒体行。这两个m行对应的IP和端口不同。It should be noted that in the above example, "a=dcmap:0" indicates BDC, and "a=dcmap:1000" indicates ADC#1. Therefore, the "webrtc-datachannel" in the first "m=application" line indicates that the m line is the media line of BDC#2, and the "webrtc-datachannel" in the second "m=application" line indicates that the m line is the media line of ADC#1. The IP and port corresponding to these two m lines are different.
S1219,S-CSCF通过E-CSCF向PSAP发送re-invite请求消息。对应地,PSAP通过E-CSCF接收来自S-CSCF的该re-invite请求消息。S1219, the S-CSCF sends a re-invite request message to the PSAP through the E-CSCF. Correspondingly, the PSAP receives the re-invite request message from the S-CSCF through the E-CSCF.
示例性地,S-CSCF接收来自MMTel AS的re-invite请求消息之后,通过E-CSCF将该re-invite请求消息转发给PSAP。可以理解的是,该re-invite请求消息包括ADC SDP offer#1和BDC SDP offer#2。Exemplarily, after receiving the re-invite request message from the MMTel AS, the S-CSCF forwards the re-invite request message to the PSAP through the E-CSCF. It can be understood that the re-invite request message includes ADC SDP offer#1 and BDC SDP offer#2.
S1220,PSAP通过S-CSCF向MMTel AS发送200响应消息。对应地,MMTel AS通过S-CSCF接收来自PSAP的该200响应消息。S1220, PSAP sends a 200 response message to MMTel AS through S-CSCF. Correspondingly, MMTel AS receives the 200 response message from PSAP through S-CSCF.
示例性地,PSAP接收到re-invite请求消息之后,根据该re-invite请求消息中携带的描述信息完成媒体协商,然后通过S-CSCF向MMTel AS发送200响应消息,该200响应消息中携带ADC SDP answer#1和BDC SDP answer#2,其中,该ADC SDP answer#1为PSAP协商确定的用于建立PSAP和UE之间的ADC的描述信息,该BDC SDP answer#2为PSAP协商确定的用于建立PSAP和DCMF之间的BDC#2的描述信息。Exemplarily, after receiving the re-invite request message, the PSAP completes the media negotiation according to the description information carried in the re-invite request message, and then sends a 200 response message to the MMTel AS through the S-CSCF. The 200 response message carries ADC SDP answer#1 and BDC SDP answer#2, wherein the ADC SDP answer#1 is the description information determined by the PSAP negotiation for establishing the ADC between the PSAP and the UE, and the BDC SDP answer#2 is the description information determined by the PSAP negotiation for establishing the BDC#2 between the PSAP and the DCMF.
S1221,MMTel AS向DCMF发送BDC SDP answer#2。对应地,DCMF接收来自MMTel AS的BDC SDP answer#2。S1221, MMTel AS sends BDC SDP answer#2 to DCMF. Correspondingly, DCMF receives BDC SDP answer#2 from MMTel AS.
示例性地,MMTel AS接收来自PSAP的200响应消息之后,从该200响应消息中获取BDC SDP answer#2,然后将该BDC SDP answer#2发送给DCMF,完成PSAP和DCMF之间的BDC#2的媒体协商。Exemplarily, after receiving the 200 response message from the PSAP, the MMTel AS obtains the BDC SDP answer#2 from the 200 response message, and then sends the BDC SDP answer#2 to the DCMF to complete the media negotiation of BDC#2 between the PSAP and the DCMF.
S1222,MMTel AS向S-CSCF发送200响应消息。对应地,S-CSCF接收来自MMTel AS的该200响应消息。
S1222: The MMTel AS sends a 200 response message to the S-CSCF. Correspondingly, the S-CSCF receives the 200 response message from the MMTel AS.
示例性地,MMTel AS接收来自DCMF的资源响应消息,以及来自PSAP的200响应消息之后,从该资源响应消息中获取BDC SDP answer#1,从该200响应消息中获取ADC SDP answer#1,然后向S-CSCF发送200响应消息,并在该200响应消息中携带该BDC SDP answer#1和ADC SDP answer#1。Exemplarily, after receiving the resource response message from DCMF and the 200 response message from PSAP, MMTel AS obtains BDC SDP answer#1 from the resource response message, obtains ADC SDP answer#1 from the 200 response message, and then sends a 200 response message to S-CSCF, and carries the BDC SDP answer#1 and ADC SDP answer#1 in the 200 response message.
S1223,S-CSCF通过P-CSCF向UE发送200响应消息。对应地,UE通过P-CSCF接收来自S-CSCF的该200响应消息。S1223, the S-CSCF sends a 200 response message to the UE via the P-CSCF. Correspondingly, the UE receives the 200 response message from the S-CSCF via the P-CSCF.
示例性地,S-CSCF接收来自MMTel AS的200响应消息之后,通过P-CSCF将该200响应消息转发给UE。UE从该200响应消息中获取BDC SDP answer#1和ADC SDP answer#1,从而完成UE和DCMF之间的BDC#1的媒体协商,以及UE和PSAP之间的ADC#1的媒体协商。Exemplarily, after receiving the 200 response message from the MMTel AS, the S-CSCF forwards the 200 response message to the UE through the P-CSCF. The UE obtains BDC SDP answer#1 and ADC SDP answer#1 from the 200 response message, thereby completing the media negotiation of BDC#1 between the UE and the DCMF, and the media negotiation of ADC#1 between the UE and the PSAP.
S1224,DCMF和UE之间建立BDC#1。S1224: BDC#1 is established between DCMF and UE.
S1225,DCMF和PSAP之间建立BDC#2。S1225, BDC#2 is established between DCMF and PSAP.
S1226,UE和PSAP之间建立ADC#1。S1226, ADC#1 is established between the UE and the PSAP.
经过上述描述信息协商流程,DCMF分别完成和主叫UE、PSAP之间的BDC的建立。UE完成可和PSAP之间的ADC的建立。After the above description information negotiation process, DCMF completes the establishment of BDC with the calling UE and PSAP respectively. UE completes the establishment of ADC with PSAP.
进一步地,UE和PSAP可以通过建立好的BDC获取DC App,然后UE上的DC App和PSAP上的DC App可以通过建立好的ADC传输信息。下面结合S1227-S1230进行示例性说明。Furthermore, the UE and the PSAP can obtain the DC App through the established BDC, and then the DC App on the UE and the DC App on the PSAP can transmit information through the established ADC. The following is an exemplary description in conjunction with S1227-S1230.
S1227,UE通过BDC#1从DCMF获取DC App,具体过程本申请不作限定。这里的DC App例如可以是紧急呼叫小程序。S1227, UE obtains DC App from DCMF through BDC#1. The specific process is not limited in this application. The DC App here can be, for example, an emergency call applet.
S1228,PSAP通过BDC#2从DCMF获取DC App。可以理解的是,PSAP获取的DC App与UE获取的DC App应相同。S1228, PSAP obtains DC App from DCMF through BDC#2. It is understandable that the DC App obtained by PSAP should be the same as the DC App obtained by UE.
S1229,UE上的DC App通过ADC#1向PSAP上的DC App发送数据#1,如图片、视频、位置等数据。S1229, the DC App on the UE sends data #1, such as pictures, videos, location and other data, to the DC App on the PSAP through ADC #1.
S1230,PSAP上的DC App通过ADC#1向UE上的DC App发送数据#2。S1230, the DC App on the PSAP sends data #2 to the DC App on the UE through ADC #1.
通过上述过程,UE和PSAP可以在下载的DC App内通过建立好的ADC通道传输图片、视频、位置等数据。Through the above process, UE and PSAP can transmit pictures, videos, location and other data through the established ADC channel in the downloaded DC App.
图13示出了适用于图10所示的网络架构的另一种方法1300的示例性流程图。在方法1300中,UE在与PSAP之间的紧急通话建立完成之后,再分别发起BDC的建立流程以及ADC的建立流程,以减少紧急通话的接通时延。并且在该实施例中,ADC锚定到DCMF。下面结合图13中的各个步骤对方法1300作示例性说明。FIG. 13 shows an exemplary flow chart of another method 1300 applicable to the network architecture shown in FIG. 10 . In method 1300 , after the emergency call between the UE and the PSAP is established, the UE initiates the establishment process of the BDC and the establishment process of the ADC respectively to reduce the connection delay of the emergency call. And in this embodiment, the ADC is anchored to the DCMF. The method 1300 is exemplarily described below in conjunction with the various steps in FIG. 13 .
在S1301-S1309b中,UE通过初始INVITE流程发起紧急呼叫,与PSAP之间建立了IMS会话。具体过程可参考方法1100中S1101-S1109b部分的描述,为了简洁,这里不再重复说明。In S1301-S1309b, the UE initiates an emergency call through the initial INVITE process and establishes an IMS session with the PSAP. The specific process can be referred to the description of S1101-S1109b in method 1100, which will not be repeated here for brevity.
进一步地,UE请求建立BDC。下面结合S1310-S1325对BDC的创建流程进行说明。Furthermore, the UE requests to establish a BDC. The creation process of the BDC is described below in conjunction with S1310-S1325.
S1310,UE向P-CSCF发送re-invite请求消息。对应地,P-CSCF接收来自UE的该re-invite请求消息。S1310, the UE sends a re-invite request message to the P-CSCF. Correspondingly, the P-CSCF receives the re-invite request message from the UE.
示例性地,UE在确定与PSAP之间的紧急通话接通之后,向P-CSCF发送re-invite请求消息,以请求协商建立BDC。该re-invite请求消息包括BDC SDP offer#1。其中,该BDC SDP offer#1为UE用于建立BDC的描述信息,如UE用于对接BDC的IP地址、端口信息、TLS ID和证书、QoS需求等。Exemplarily, after confirming that the emergency call with the PSAP is connected, the UE sends a re-invite request message to the P-CSCF to request negotiation to establish a BDC. The re-invite request message includes BDC SDP offer#1. The BDC SDP offer#1 is the description information used by the UE to establish the BDC, such as the IP address, port information, TLS ID and certificate, QoS requirements, etc. used by the UE to connect to the BDC.
可以理解的是,UE也可以在S1301的初始INVITE请求消息中携带BDC SDP offer#1。在这种情况下,UE可以不再在S1310的re-invite请求消息中携带BDC SDP offer#1。It is understandable that the UE may also carry BDC SDP offer#1 in the initial INVITE request message of S1301. In this case, the UE may no longer carry BDC SDP offer#1 in the re-invite request message of S1310.
作为一种可能的示例,下面给出了一种UE在re-invite请求消息中携带的BDC SDP offer#1的示例:As a possible example, the following is an example of BDC SDP offer#1 carried by the UE in the re-invite request message:
v=0v=0
o=-0 1IN IP4 58.60.100.114o=-0 1IN IP4 58.60.100.114
s=SBC calls=SBC call
c=IN IP4 135.215.6.221c=IN IP4 135.215.6.221
b=CT:4096b=CT:4096
t=0 0t=0 0
m=audio 15012 RTP/AVP 107m=audio 15012 RTP/AVP 107
b=AS:80b=AS:80
b=RR:1837b=RR:1837
b=RS:612
b=RS:612
a=rtpmap:107 AMR-WB/16000a=rtpmap:107 AMR-WB/16000
a=fmtp:107 mode-set=7a=fmtp:107 mode-set=7
a=sendrecva=sendrecv
m=application 15014 UDP/DTLS/SCTP webrtc-datachannelm=application 15014 UDP/DTLS/SCTP webrtc-datachannel
b=AS:500b=AS:500
a=max-message-size:1024a=max-message-size:1024
a=sctp-port:5000a=sctp-port:5000
a=setup:passivea=setup:passive
a=fingerprint:SHA-1 4A:AD:B9:B1:3F:82:18:3B:54:02:12:DF:3E:5D:49:6B:19:E5:7C:ABa=fingerprint:SHA-1 4A:AD:B9:B1:3F:82:18:3B:54:02:12:DF:3E:5D:49:6B:19:E5:7C:AB
a=tls-id:abc3de65cddef001be82a=tls-id:abc3de65cddef001be82
a=dcmap:0 subprotocol="http"a=dcmap:0 subprotocol="http"
需要说明的是,在上述示例中,“m=application”所在行的“webrtc-datachannel”表示该m行是DC通道的媒体行;“a=dcmap:0”表示BDC。It should be noted that, in the above example, "webrtc-datachannel" in the row where "m=application" is located indicates that the m row is a media row of the DC channel; "a=dcmap:0" indicates BDC.
S1311,P-CSCF向S-CSCF发送re-invite请求消息。对应地,S-CSCF接收来自P-CSCF的re-invite请求消息。S1311, the P-CSCF sends a re-invite request message to the S-CSCF. Correspondingly, the S-CSCF receives the re-invite request message from the P-CSCF.
示例性地,P-CSCF接收来自UE的re-invite请求消息之后,根据初始INVITE请求消息的路由,将re-INVITE请求消息转发给S-CSCF。Exemplarily, after receiving the re-invite request message from the UE, the P-CSCF forwards the re-INVITE request message to the S-CSCF according to the route of the initial INVITE request message.
S1312,S-CSCF向MMTel AS发送re-invite请求消息。对应地,MMTel AS接收来自S-CSCF的re-invite请求消息。S1312, S-CSCF sends a re-invite request message to MMTel AS. Correspondingly, MMTel AS receives the re-invite request message from S-CSCF.
示例性地,S-CSCF接收来自UE的re-invite请求消息之后,根据初始INVITE请求消息的路由,将re-INVITE请求消息转发给MMTel AS。Exemplarily, after receiving the re-invite request message from the UE, the S-CSCF forwards the re-INVITE request message to the MMTel AS according to the routing of the initial INVITE request message.
可选地,S1313,MMTel AS确定触发BDC创建流程。Optionally, S1313, MMTel AS determines to trigger the BDC creation process.
示例性地,MMTel AS接收来自S-CSCF的re-invite请求消息之后,在发现该re-invite请求消息携带有BDC描述信息(即上述BDC SDP offer#1),并确定UE支持DC(可以是在初始INVITE流程确定UE支持DC,也可以是根据re-invite请求消息携带的DC能力指示信息确定UE支持DC)的情况下,确定触发BDC创建流程,即则触发DC呼叫事件上报(具体可见S1314)。Exemplarily, after receiving the re-invite request message from the S-CSCF, the MMTel AS determines to trigger the BDC creation process, i.e., trigger the DC call event report (see S1314 for details), if it finds that the re-invite request message carries the BDC description information (i.e., the above-mentioned BDC SDP offer#1) and determines that the UE supports DC (it can be determined that the UE supports DC in the initial INVITE process, or it can be determined that the UE supports DC based on the DC capability indication information carried in the re-invite request message).
S1314,MMTel AS向DCSF发送DC活动通知(DC event notify)消息。对应地,DCSF接收来自MMTel AS的该DC活动通知消息。S1314, MMTel AS sends a DC event notify message to DCSF. Correspondingly, DCSF receives the DC event notify message from MMTel AS.
示例性地,MMTel AS向DCSF发送DC活动通知消息,以上报紧急呼叫的DC呼叫事件给DCSF。Exemplarily, the MMTel AS sends a DC activity notification message to the DCSF to report the DC call event of the emergency call to the DCSF.
S1315,DCSF向发送DC控制请求(DC control request)消息。对应地,DC接收来自DCSF的该DC控制请求消息。S1315, DCSF sends a DC control request message to DC. Correspondingly, DC receives the DC control request message from DCSF.
示例性地,DCSF收到MMTel AS上报的DC呼叫事件之后,确定当前呼叫为紧急呼叫,则DCSF向MMTel AS下发DC控制请求消息,以申请BDC通道资源。For example, after DCSF receives the DC call event reported by MMTel AS and determines that the current call is an emergency call, DCSF sends a DC control request message to MMTel AS to apply for BDC channel resources.
S1316,MMTel AS向DCMF发送资源请求消息。对应地,DCMF接收来自MMTel AS的该资源请求消息。S1316, MMTel AS sends a resource request message to DCMF. Correspondingly, DCMF receives the resource request message from MMTel AS.
示例性地,MMTel AS接收来自DCSF的DC控制请求消息之后,向DCMF申请BDC通道资源。例如,MMTel AS向DCMF发送资源请求消息,该资源请求消息包括BDC SDP offer#1,该资源请求消息用于请求获取DCMF用于创建BDC的描述信息。Exemplarily, after receiving the DC control request message from DCSF, MMTel AS applies for BDC channel resources from DCMF. For example, MMTel AS sends a resource request message to DCMF, the resource request message including BDC SDP offer#1, and the resource request message is used to request DCMF to obtain description information for creating BDC.
S1317,DCMF向MMTel AS发送资源响应消息。对应地,MMTel AS接收来自DCMF的该资源响应消息。S1317, DCMF sends a resource response message to MMTel AS. Correspondingly, MMTel AS receives the resource response message from DCMF.
示例性地,接收来自MMTel AS的资源请求消息之后,DCMF基于BDC SDP offer#1进行媒体协商,确定用于创建UE和DCMF之间的BDC(记为BDC#1)的描述信息,并分配用于创建PSAP和DCMF之间的BDC(记为BDC#2)的描述信息。Exemplarily, after receiving the resource request message from the MMTel AS, DCMF performs media negotiation based on BDC SDP offer#1, determines the description information for creating the BDC between the UE and DCMF (denoted as BDC#1), and allocates the description information for creating the BDC between the PSAP and DCMF (denoted as BDC#2).
进一步地,DCMF向MMTel AS发送资源响应消息,该资源响应消息包括BDC SDP answer#1和BDC SDP offer#2。其中,BDC SDP answer#1为DCMF协商确定的用于创建UE和DCMF之间的BDC#1的描述信息;BDC SDP offer#2为DCMF分配的用于创建PSAP和DCMF之间的BDC#2的描述信息。Further, DCMF sends a resource response message to MMTel AS, which includes BDC SDP answer#1 and BDC SDP offer#2. BDC SDP answer#1 is the description information of BDC#1 determined by DCMF negotiation for establishing BDC#1 between UE and DCMF; BDC SDP offer#2 is the description information of BDC#2 allocated by DCMF for establishing BDC#2 between PSAP and DCMF.
S1318,MMTel AS向S-CSCF发送re-invite请求消息。对应地,S-CSCF接收来自MMTel AS的re-invite请求消息。
S1318, the MMTel AS sends a re-invite request message to the S-CSCF. Correspondingly, the S-CSCF receives the re-invite request message from the MMTel AS.
示例性地,MMTel AS接收来自DCMF的资源响应消息之后,向S-CSCF发送re-invite请求消息,并在该re-invite请求消息中携带BDC SDP offer#2,以协商DCMF和PSAP之间的BDC#2的描述信息。Exemplarily, after receiving the resource response message from DCMF, MMTel AS sends a re-invite request message to S-CSCF, and carries BDC SDP offer#2 in the re-invite request message to negotiate the description information of BDC#2 between DCMF and PSAP.
S1319,S-CSCF通过E-CSCF向PSAP发送re-invite请求消息。对应地,PSAP通过E-CSCF接收来自S-CSCF的该re-invite请求消息。S1319, the S-CSCF sends a re-invite request message to the PSAP through the E-CSCF. Correspondingly, the PSAP receives the re-invite request message from the S-CSCF through the E-CSCF.
示例性地,S-CSCF接收来自MMTel AS的re-invite请求消息之后,通过E-CSCF将该re-invite请求消息转发给PSAP。Exemplarily, after receiving the re-invite request message from the MMTel AS, the S-CSCF forwards the re-invite request message to the PSAP through the E-CSCF.
可以理解的是,该re-invite请求消息包括BDC SDP offer#2。该BDC SDP offer#2和的示例可参考S1310部分介绍的BDC SDP offer#1的示例,这里不再赘述。It is understandable that the re-invite request message includes BDC SDP offer#2. The example of BDC SDP offer#2 and BDC SDP offer#1 can be referred to the example of BDC SDP offer#1 introduced in S1310, which will not be repeated here.
S1320,PSAP通过S-CSCF向MMTel AS发送200响应消息。对应地,MMTel AS通过S-CSCF接收来自PSAP的该200响应消息。S1320, PSAP sends a 200 response message to MMTel AS through S-CSCF. Correspondingly, MMTel AS receives the 200 response message from PSAP through S-CSCF.
示例性地,PSAP接收到re-invite请求消息之后,根据该re-invite请求消息中携带的描述信息完成媒体协商,然后通过S-CSCF向MMTel AS发送200响应消息,该200响应消息中携带BDC SDP answer#2,其中,该BDC SDP answer#2为PSAP协商确定的用于建立PSAP和DCMF之间的BDC#2的描述信息。Exemplarily, after receiving the re-invite request message, the PSAP completes the media negotiation according to the description information carried in the re-invite request message, and then sends a 200 response message to the MMTel AS through the S-CSCF. The 200 response message carries BDC SDP answer#2, wherein the BDC SDP answer#2 is the description information of BDC#2 determined by PSAP negotiation for establishing between the PSAP and DCMF.
S1321,MMTel AS向DCMF发送BDC SDP answer#2。对应地,DCMF接收来自MMTel AS的BDC SDP answer#2。S1321, MMTel AS sends BDC SDP answer#2 to DCMF. Correspondingly, DCMF receives BDC SDP answer#2 from MMTel AS.
示例性地,MMTel AS接收来自PSAP的200响应消息之后,从该200响应消息中获取BDC SDP answer#2,然后将该BDC SDP answer#2发送给DCMF,完成PSAP和DCMF之间的BDC#2的媒体协商。Exemplarily, after receiving the 200 response message from the PSAP, the MMTel AS obtains the BDC SDP answer#2 from the 200 response message, and then sends the BDC SDP answer#2 to the DCMF to complete the media negotiation of BDC#2 between the PSAP and the DCMF.
S1322,MMTel AS向S-CSCF发送200响应消息。对应地,S-CSCF接收来自MMTel AS的该200响应消息。S1322, the MMTel AS sends a 200 response message to the S-CSCF. Correspondingly, the S-CSCF receives the 200 response message from the MMTel AS.
示例性地,MMTel AS接收来自DCMF的资源响应消息之后,从该资源响应消息中获取BDC SDP answer#1,然后向S-CSCF发送200响应消息,并在该200响应消息中携带该BDC SDP answer#1。Exemplarily, after receiving the resource response message from DCMF, MMTel AS obtains BDC SDP answer#1 from the resource response message, and then sends a 200 response message to S-CSCF, and carries the BDC SDP answer#1 in the 200 response message.
可以理解的是,本申请不限定MMTel AS执行S1318和S1322的先后顺序。It is understandable that this application does not limit the order in which MMTel AS executes S1318 and S1322.
S1323,S-CSCF通过P-CSCF向UE发送200响应消息。对应地,UE通过P-CSCF接收来自S-CSCF的该200响应消息。S1323, the S-CSCF sends a 200 response message to the UE via the P-CSCF. Correspondingly, the UE receives the 200 response message from the S-CSCF via the P-CSCF.
示例性地,S-CSCF接收来自MMTel AS的200响应消息之后,通过P-CSCF将该200响应消息转发给UE。UE从该200响应消息中获取BDC SDP answer#1,从而完成UE和DCMF之间的BDC#1的媒体协商。Exemplarily, after receiving the 200 response message from the MMTel AS, the S-CSCF forwards the 200 response message to the UE through the P-CSCF. The UE obtains the BDC SDP answer#1 from the 200 response message, thereby completing the media negotiation of BDC#1 between the UE and the DCMF.
S1324,DCMF和UE之间建立BDC#1。S1324, BDC#1 is established between DCMF and UE.
S1325,DCMF和PSAP之间建立BDC#2。S1325, BDC#2 is established between DCMF and PSAP.
经过上述描述信息协商流程,DCMF分别完成和主叫UE、PSAP之间的BDC的建立。After the above description information negotiation process, DCMF completes the establishment of BDC with the calling UE and PSAP respectively.
进一步地,UE请求建立ADC。下面结合S1326-S1341对ADC的创建流程进行示例性说明。Further, the UE requests to establish an ADC. The following is an exemplary description of the ADC creation process in conjunction with S1326-S1341.
S1326,UE向P-CSCF发送re-invite请求消息。对应地,P-CSCF接收来自UE的该re-invite请求消息。S1326, the UE sends a re-invite request message to the P-CSCF. Correspondingly, the P-CSCF receives the re-invite request message from the UE.
示例性地,UE在确定与PSAP之间的紧急通话接通之后,向P-CSCF发送re-invite请求消息,以请求协商建立ADC。该re-invite请求消息包括ADC SDP offer#1。其中,该ADC SDP offer#1为UE用于建立ADC的描述信息,如UE用于对接ADC的IP地址、端口信息、TLS ID和证书、QoS需求等。Exemplarily, after confirming that the emergency call with the PSAP is connected, the UE sends a re-invite request message to the P-CSCF to request negotiation to establish an ADC. The re-invite request message includes ADC SDP offer#1. The ADC SDP offer#1 is the description information used by the UE to establish the ADC, such as the IP address, port information, TLS ID and certificate, QoS requirements, etc. used by the UE to connect to the ADC.
在一种可能的实现方式中,可以在BDC SDP offer#1的m行,新增ADC SDP offer#1的a行,下面给出了一种UE在re-invite请求消息中携带的ADC SDP offer#1的示例:In a possible implementation, a line a of ADC SDP offer#1 may be added to line m of BDC SDP offer#1. An example of ADC SDP offer#1 carried by the UE in a re-invite request message is given below:
v=0v=0
o=-0 1 IN IP4 58.60.100.114o=-0 1 IN IP4 58.60.100.114
s=SBC calls=SBC call
c=IN IP4 135.215.6.221c=IN IP4 135.215.6.221
b=CT:4096b=CT:4096
t=0 0t=0 0
m=audio 15012 RTP/AVP 107m=audio 15012 RTP/AVP 107
b=AS:80b=AS:80
b=RR:1837b=RR:1837
b=RS:612b=RS:612
a=rtpmap:107 AMR-WB/16000
a=rtpmap:107 AMR-WB/16000
a=fmtp:107 mode-set=7a=fmtp:107 mode-set=7
a=sendrecva=sendrecv
m=application 15014 UDP/DTLS/SCTP webrtc-datachannelm=application 15014 UDP/DTLS/SCTP webrtc-datachannel
b=AS:500b=AS:500
a=max-message-size:1024a=max-message-size:1024
a=sctp-port:5000a=sctp-port:5000
a=setup:passivea=setup:passive
a=fingerprint:SHA-1 4A:AD:B9:B1:3F:82:18:3B:54:02:12:DF:3E:5D:49:6B:19:E5:7C:ABa=fingerprint:SHA-1 4A:AD:B9:B1:3F:82:18:3B:54:02:12:DF:3E:5D:49:6B:19:E5:7C:AB
a=tls-id:abc3de65cddef001be82a=tls-id:abc3de65cddef001be82
a=dcmap:0 subprotocol="http"a=dcmap:0 subprotocol="http"
a=dcmap:1000 max-time=150;label="low latency"a=dcmap:1000 max-time=150;label="low latency"
需要说明的是,在上述示例中,“m=application”所在行的“webrtc-datachannel”表示该m行是DC通道的媒体行;“a=dcmap:0”表示ADC。It should be noted that, in the above example, "webrtc-datachannel" in the row where "m=application" is located indicates that the m row is the media row of the DC channel; "a=dcmap:0" indicates ADC.
S1327,P-CSCF向S-CSCF发送re-invite请求消息。对应地,S-CSCF接收来自P-CSCF的re-invite请求消息。S1327, the P-CSCF sends a re-invite request message to the S-CSCF. Correspondingly, the S-CSCF receives the re-invite request message from the P-CSCF.
示例性地,P-CSCF接收来自UE的re-invite请求消息之后,根据初始INVITE请求消息的路由,将re-INVITE请求消息转发给S-CSCF。Exemplarily, after receiving the re-invite request message from the UE, the P-CSCF forwards the re-INVITE request message to the S-CSCF according to the route of the initial INVITE request message.
S1328,S-CSCF向MMTel AS发送re-invite请求消息。对应地,MMTel AS接收来自S-CSCF的re-invite请求消息。S1328, S-CSCF sends a re-invite request message to MMTel AS. Correspondingly, MMTel AS receives the re-invite request message from S-CSCF.
示例性地,S-CSCF接收来自UE的re-invite请求消息之后,根据初始INVITE请求消息的路由,将re-INVITE请求消息转发给MMTel AS。Exemplarily, after receiving the re-invite request message from the UE, the S-CSCF forwards the re-INVITE request message to the MMTel AS according to the routing of the initial INVITE request message.
可选地,S1329,MMTel AS确定触发ADC创建流程。Optionally, S1329, MMTel AS determines to trigger the ADC creation process.
示例性地,MMTel AS接收来自S-CSCF的re-invite请求消息之后,在发现该re-invite请求消息携带有ADC描述信息(即上述ADC SDP offer#1),并确定UE支持DC(可以是在初始INVITE流程确定UE支持DC,也可以是根据re-invite请求消息携带的DC能力指示信息确定UE支持DC)的情况下,确定触发ADC创建流程,即则触发DC呼叫事件上报(具体可见S1330)。Exemplarily, after receiving the re-invite request message from the S-CSCF, the MMTel AS determines to trigger the ADC creation process, i.e., trigger the DC call event reporting, if it finds that the re-invite request message carries the ADC description information (i.e., the above-mentioned ADC SDP offer#1) and determines that the UE supports DC (it can be determined that the UE supports DC in the initial INVITE process, or it can be determined that the UE supports DC based on the DC capability indication information carried in the re-invite request message). (See S1330 for details)
S1330,MMTel AS向DCSF发送DC活动通知(DC event notify)消息。对应地,DCSF接收来自MMTel AS的该DC活动通知消息。S1330, MMTel AS sends a DC event notify message to DCSF. Correspondingly, DCSF receives the DC event notify message from MMTel AS.
示例性地,MMTel AS向DCMF发送DC活动通知消息,以上报紧急呼叫的DC呼叫事件给DCSF。Exemplarily, the MMTel AS sends a DC activity notification message to the DCMF to report the DC call event of the emergency call to the DCSF.
S1331,DCSF向发送DC控制请求(DC control request)消息。对应地,DC接收来自DCSF的该DC控制请求消息。S1331, DCSF sends a DC control request message to DC. Correspondingly, DC receives the DC control request message from DCSF.
示例性地,DCSF收到MMTel AS上报的DC呼叫事件之后,确定当前呼叫为紧急呼叫,且ADC需要锚定到DCMF,则DCSF向MMTel AS下发DC控制请求消息,以申请ADC通道资源。For example, after DCSF receives the DC call event reported by MMTel AS, it determines that the current call is an emergency call and the ADC needs to be anchored to DCMF. Then, DCSF sends a DC control request message to MMTel AS to apply for ADC channel resources.
S1332,MMTel AS向DCMF发送资源请求消息。对应地,DCMF接收来自MMTel AS的该资源请求消息。S1332, MMTel AS sends a resource request message to DCMF. Correspondingly, DCMF receives the resource request message from MMTel AS.
示例性地,MMTel AS接收来自DCSF的DC控制请求消息之后,向DCMF申请ADC通道资源。例如,MMTel AS向DCMF发送资源请求消息,该资源请求消息包括ADC SDP offer#1,该资源请求消息用于请求获取DCMF用于创建ADC的描述信息。Exemplarily, after receiving the DC control request message from DCSF, MMTel AS applies for ADC channel resources from DCMF. For example, MMTel AS sends a resource request message to DCMF, the resource request message including ADC SDP offer#1, and the resource request message is used to request DCMF to obtain description information for creating ADC.
S1333,DCMF向MMTel AS发送资源响应消息。对应地,MMTel AS接收来自DCMF的该资源响应消息。S1333: DCMF sends a resource response message to MMTel AS. Correspondingly, MMTel AS receives the resource response message from DCMF.
示例性地,接收来自MMTel AS的资源请求消息之后,DCMF基于ADC SDP offer#1进行媒体协商,确定用于创建UE和DCMF之间的ADC(记为ADC#1)的描述信息,并分配用于创建PSAP和DCMF之间的ADC(记为ADC#2)的描述信息。Exemplarily, after receiving the resource request message from the MMTel AS, the DCMF performs media negotiation based on the ADC SDP offer#1, determines the description information for creating the ADC between the UE and the DCMF (denoted as ADC#1), and allocates the description information for creating the ADC between the PSAP and the DCMF (denoted as ADC#2).
进一步地,DCMF向MMTel AS发送资源响应消息,该资源响应消息包括ADC SDP answer#1和ADC SDP offer#2。其中,ADC SDP answer#1为DCMF协商确定的用于创建UE和DCMF之间的ADC#1的描述信息;ADC SDP offer#2为DCMF分配的用于创建PSAP和DCMF之间的ADC#2的描述信息。Further, DCMF sends a resource response message to MMTel AS, which includes ADC SDP answer#1 and ADC SDP offer#2. ADC SDP answer#1 is the description information of ADC#1 determined by DCMF negotiation for establishing UE and DCMF; ADC SDP offer#2 is the description information of ADC#2 allocated by DCMF for establishing PSAP and DCMF.
S1334,MMTel AS向S-CSCF发送re-invite请求消息。对应地,S-CSCF接收来自MMTel AS的re-invite请求消息。
S1334: The MMTel AS sends a re-invite request message to the S-CSCF. Correspondingly, the S-CSCF receives the re-invite request message from the MMTel AS.
示例性地,MMTel AS接收来自DCMF的资源响应消息之后,向S-CSCF发送re-invite请求消息,并在该re-invite请求消息中携带ADC SDP offer#2,以协商DCMF和PSAP之间的ADC#2的描述信息。Exemplarily, after receiving the resource response message from DCMF, MMTel AS sends a re-invite request message to S-CSCF, and carries ADC SDP offer#2 in the re-invite request message to negotiate the description information of ADC#2 between DCMF and PSAP.
S1335,S-CSCF通过E-CSCF向PSAP发送re-invite请求消息。对应地,PSAP通过E-CSCF接收来自S-CSCF的该re-invite请求消息。S1335, the S-CSCF sends a re-invite request message to the PSAP through the E-CSCF. Correspondingly, the PSAP receives the re-invite request message from the S-CSCF through the E-CSCF.
示例性地,S-CSCF接收来自MMTel AS的re-invite请求消息之后,通过E-CSCF将该re-invite请求消息转发给PSAP。Exemplarily, after receiving the re-invite request message from the MMTel AS, the S-CSCF forwards the re-invite request message to the PSAP through the E-CSCF.
可以理解的是,该re-invite请求消息包括ADC SDP offer#2。该ADC SDP offer#2和的示例可参考S1326部分介绍的ADC SDP offer#1的示例,这里不再赘述。It is understandable that the re-invite request message includes ADC SDP offer#2. The example of ADC SDP offer#2 and can refer to the example of ADC SDP offer#1 introduced in S1326, which will not be repeated here.
S1336,PSAP通过S-CSCF向MMTel AS发送200响应消息。对应地,MMTel AS通过S-CSCF接收来自PSAP的该200响应消息。S1336, PSAP sends a 200 response message to MMTel AS through S-CSCF. Correspondingly, MMTel AS receives the 200 response message from PSAP through S-CSCF.
示例性地,PSAP接收到re-invite请求消息之后,根据该re-invite请求消息中携带的描述信息完成媒体协商,然后通过S-CSCF向MMTel AS发送200响应消息,该200响应消息中携带ADC SDP answer#2,其中,该ADC SDP answer#2为PSAP协商确定的用于建立PSAP和DCMF之间的ADC#2的描述信息。Exemplarily, after receiving the re-invite request message, the PSAP completes the media negotiation according to the description information carried in the re-invite request message, and then sends a 200 response message to the MMTel AS through the S-CSCF. The 200 response message carries ADC SDP answer#2, wherein the ADC SDP answer#2 is the description information of ADC#2 determined by the PSAP negotiation for establishing the connection between the PSAP and the DCMF.
S1337,MMTel AS向DCMF发送ADC SDP answer#2。对应地,DCMF接收来自MMTel AS的ADC SDP answer#2。S1337, MMTel AS sends ADC SDP answer#2 to DCMF. Correspondingly, DCMF receives ADC SDP answer#2 from MMTel AS.
示例性地,MMTel AS接收来自PSAP的200响应消息之后,从该200响应消息中获取ADC SDP answer#2,然后将该ADC SDP answer#2发送给DCMF,完成PSAP和DCMF之间的ADC#2的媒体协商。Exemplarily, after receiving the 200 response message from the PSAP, the MMTel AS obtains ADC SDP answer#2 from the 200 response message, and then sends the ADC SDP answer#2 to the DCMF to complete the media negotiation of ADC#2 between the PSAP and the DCMF.
S1338,MMTel AS向S-CSCF发送200响应消息。对应地,S-CSCF接收来自MMTel AS的该200响应消息。S1338, MMTel AS sends a 200 response message to S-CSCF. Correspondingly, S-CSCF receives the 200 response message from MMTel AS.
示例性地,MMTel AS接收来自DCMF的资源响应消息之后,从该资源响应消息中获取ADC SDP answer#1,然后向S-CSCF发送200响应消息,并在该200响应消息中携带该ADC SDP answer#1。Exemplarily, after receiving the resource response message from DCMF, the MMTel AS obtains ADC SDP answer#1 from the resource response message, and then sends a 200 response message to the S-CSCF, and carries the ADC SDP answer#1 in the 200 response message.
可以理解的是,本申请不限定MMTel AS执行S1334和S1338的先后顺序。It is understandable that this application does not limit the order in which MMTel AS executes S1334 and S1338.
S1339,S-CSCF通过P-CSCF向UE发送200响应消息。对应地,UE通过P-CSCF接收来自S-CSCF的该200响应消息。S1339, the S-CSCF sends a 200 response message to the UE via the P-CSCF. Correspondingly, the UE receives the 200 response message from the S-CSCF via the P-CSCF.
示例性地,S-CSCF接收来自MMTel AS的200响应消息之后,通过P-CSCF将该200响应消息转发给UE。UE从该200响应消息中获取ADC SDP answer#1,从而完成UE和DCMF之间的ADC#1的媒体协商。Exemplarily, after receiving the 200 response message from the MMTel AS, the S-CSCF forwards the 200 response message to the UE through the P-CSCF. The UE obtains ADC SDP answer#1 from the 200 response message, thereby completing the media negotiation of ADC#1 between the UE and the DCMF.
S1340,DCMF和UE之间建立ADC#1。S1340, ADC#1 is established between the DCMF and the UE.
S1341,DCMF和PSAP之间建立ADC#2。S1341, ADC#2 is established between DCMF and PSAP.
经过上述描述信息协商流程,DCMF分别完成和主叫UE、PSAP之间的ADC的建立。After the above description information negotiation process, DCMF completes the establishment of ADC with the calling UE and PSAP respectively.
进一步地,UE和PSAP可以通过建立好的BDC获取DC App,然后UE上的DC App和PSAP上的DC App可以通过建立好的ADC传输信息,具体如S1342-S1347所示。其中S1342-S1347与方法1100中的S1126-S1131类似,为了简洁,这里不再赘述。Furthermore, the UE and the PSAP can obtain the DC App through the established BDC, and then the DC App on the UE and the DC App on the PSAP can transmit information through the established ADC, as shown in S1342-S1347. S1342-S1347 are similar to S1126-S1131 in method 1100, and will not be repeated here for the sake of brevity.
可以理解的是,在方法1300中UE和PSAP获取DC App的流程(即S1342-S1343)可以在BDC创建流程之后(即S1324和S1325之后)的任意时刻执行,本申请不作限定。It can be understood that the process of UE and PSAP obtaining DC App in method 1300 (i.e., S1342-S1343) can be executed at any time after the BDC creation process (i.e., after S1324 and S1325), and this application does not limit it.
图14示出了适用于图10所示的网络架构的另一种方法1400的示例性流程图。在方法1400中,UE在与PSAP之间的紧急通话建立完成之后,再分别发起BDC的建立流程以及ADC的建立流程,以减少紧急通话的接通时延。并且在该实施例中,ADC锚定到DCMF。下面结合图14中的各个步骤对方法1400作示例性说明。FIG. 14 shows an exemplary flow chart of another method 1400 applicable to the network architecture shown in FIG. 10 . In method 1400, after the emergency call between the UE and the PSAP is established, the UE initiates the establishment process of the BDC and the establishment process of the ADC respectively to reduce the connection delay of the emergency call. And in this embodiment, the ADC is anchored to the DCMF. The method 1400 is exemplarily described below in conjunction with the various steps in FIG. 14 .
在S1401-S1409b中,UE通过初始INVITE流程发起紧急呼叫,与PSAP之间建立了IMS会话。具体过程可参考方法1100中S1101-S1109b部分的描述,为了简洁,这里不再重复说明。In S1401-S1409b, the UE initiates an emergency call through the initial INVITE process and establishes an IMS session with the PSAP. The specific process can be referred to the description of S1101-S1109b in method 1100, and will not be repeated here for the sake of brevity.
进一步地,UE请求建立BDC,具体过程如S1410-S1425所示。S1410-S1425与方法1300中的S1310-S1325类似,为了简洁,这里不再赘述。Further, the UE requests to establish a BDC, and the specific process is shown in S1410-S1425. S1410-S1425 are similar to S1310-S1325 in method 1300, and are not described here for brevity.
再进一步地,UE请求建立ADC。下面结合S1426-S1437对ADC的创建流程进行示例性说明。Furthermore, the UE requests to establish an ADC. The following is an exemplary description of the ADC creation process in conjunction with S1426-S1437.
S1426,UE向P-CSCF发送re-invite请求消息。对应地,P-CSCF接收来自UE的该re-invite请求消息。S1426, the UE sends a re-invite request message to the P-CSCF. Correspondingly, the P-CSCF receives the re-invite request message from the UE.
示例性地,UE在确定与PSAP之间的紧急通话接通之后,向P-CSCF发送re-invite请求消息,以请求协商建立ADC。该re-invite请求消息包括ADC SDP offer#1。其中,该ADC SDP offer#1为UE用于建立ADC的描述信息,如UE用于对接ADC的IP地址、端口信息、TLS ID和证书、QoS需求等。
Exemplarily, after determining that the emergency call between the UE and the PSAP is connected, the UE sends a re-invite request message to the P-CSCF to request negotiation to establish an ADC. The re-invite request message includes ADC SDP offer#1. The ADC SDP offer#1 is the description information used by the UE to establish the ADC, such as the IP address, port information, TLS ID and certificate, QoS requirements, etc. used by the UE to connect to the ADC.
在一种可能的实现方式中,可以在BDC SDP offer#1的m行,新增ADC SDP offer#1的m行,下面给出了一种UE在re-invite请求消息中携带的ADC SDP offer#1的示例:In a possible implementation, m lines of ADC SDP offer#1 may be added to m lines of BDC SDP offer#1. The following is an example of ADC SDP offer#1 carried by the UE in the re-invite request message:
v=0v=0
o=-0 1 IN IP4 58.60.100.114o=-0 1 IN IP4 58.60.100.114
s=SBC calls=SBC call
c=IN IP4 135.215.6.221c=IN IP4 135.215.6.221
b=CT:4096b=CT:4096
t=0 0t=0 0
m=audio 15012 RTP/AVP 107m=audio 15012 RTP/AVP 107
b=AS:80b=AS:80
b=RR:1837b=RR:1837
b=RS:612b=RS:612
a=rtpmap:107 AMR-WB/16000a=rtpmap:107 AMR-WB/16000
a=fmtp:107 mode-set=7a=fmtp:107 mode-set=7
a=sendrecva=sendrecv
m=application 15014 UDP/DTLS/SCTP webrtc-datachannelm=application 15014 UDP/DTLS/SCTP webrtc-datachannel
b=AS:500b=AS:500
a=max-message-size:1024a=max-message-size:1024
a=sctp-port:5000a=sctp-port:5000
a=setup:passivea=setup:passive
a=fingerprint:SHA-1 4A:AD:B9:B1:3F:82:18:3B:54:02:12:DF:3E:5D:49:6B:19:E5:7C:ABa=fingerprint:SHA-1 4A:AD:B9:B1:3F:82:18:3B:54:02:12:DF:3E:5D:49:6B:19:E5:7C:AB
a=tls-id:abc3de65cddef001be82a=tls-id:abc3de65cddef001be82
a=dcmap:0 subprotocol="http"a=dcmap:0 subprotocol="http"
m=application 15016 UDP/DTLS/SCTP webrtc-datachannelm=application 15016 UDP/DTLS/SCTP webrtc-datachannel
b=AS:500b=AS:500
a=max-message-size:1024a=max-message-size:1024
a=sctp-port:5000a=sctp-port:5000
a=setup:passivea=setup:passive
a=fingerprint:SHA-1 4A:AD:B9:B1:3F:82:18:3B:54:02:12:DF:3E:5D:49:6B:19:E5:7C:ABa=fingerprint:SHA-1 4A:AD:B9:B1:3F:82:18:3B:54:02:12:DF:3E:5D:49:6B:19:E5:7C:AB
a=tls-id:abc3de65cddef001be82a=tls-id:abc3de65cddef001be82
a=dcmap:1000 max-time=150;label="low latency"a=dcmap:1000 max-time=150;label="low latency"
需要说明的是,在上述示例中,“m=application”所在行的“webrtc-datachannel”表示该m行是DC通道的媒体行;“a=dcmap:0”表示ADC。It should be noted that, in the above example, "webrtc-datachannel" in the row where "m=application" is located indicates that the m row is the media row of the DC channel; "a=dcmap:0" indicates ADC.
S1427,P-CSCF向S-CSCF发送re-invite请求消息。对应地,S-CSCF接收来自P-CSCF的re-invite请求消息。S1427, the P-CSCF sends a re-invite request message to the S-CSCF. Correspondingly, the S-CSCF receives the re-invite request message from the P-CSCF.
示例性地,P-CSCF接收来自UE的re-invite请求消息之后,根据初始INVITE请求消息的路由,将re-INVITE请求消息转发给S-CSCF。Exemplarily, after receiving the re-invite request message from the UE, the P-CSCF forwards the re-INVITE request message to the S-CSCF according to the route of the initial INVITE request message.
S1428,S-CSCF向MMTel AS发送re-invite请求消息。对应地,MMTel AS接收来自S-CSCF的re-invite请求消息。S1428, S-CSCF sends a re-invite request message to MMTel AS. Correspondingly, MMTel AS receives the re-invite request message from S-CSCF.
示例性地,S-CSCF接收来自UE的re-invite请求消息之后,根据初始INVITE请求消息的路由,将re-INVITE请求消息转发给MMTel AS。Exemplarily, after receiving the re-invite request message from the UE, the S-CSCF forwards the re-INVITE request message to the MMTel AS according to the routing of the initial INVITE request message.
可选地,S1429,MMTel AS确定触发ADC创建流程。Optionally, S1429, MMTel AS determines to trigger the ADC creation process.
示例性地,MMTel AS接收来自S-CSCF的re-invite请求消息之后,在发现该re-invite请求消息携带有ADC描述信息(即上述ADC SDP offer#1),并确定UE支持DC(可以是在初始INVITE流程确定UE支持DC,也可以是根据re-invite请求消息携带的DC能力指示信息确定UE支持DC)的情况下,确定触发ADC创建流程,即则触发DC呼叫事件上报(具体可见S1430)。Exemplarily, after receiving the re-invite request message from the S-CSCF, the MMTel AS determines to trigger the ADC creation process, i.e., trigger the DC call event reporting (see S1430 for details), if it is found that the re-invite request message carries the ADC description information (i.e., the above-mentioned ADC SDP offer#1) and determines that the UE supports DC (it can be determined that the UE supports DC in the initial INVITE process or based on the DC capability indication information carried in the re-invite request message).
S1430,MMTel AS向DCSF发送DC活动通知(DC event notify)消息。对应地,DCSF接收来自
MMTel AS的该DC活动通知消息。S1430, MMTel AS sends a DC event notify message to DCSF. Correspondingly, DCSF receives a DC event notify message from This DC activity notification message from MMTel AS.
示例性地,MMTel AS向DCSF发送DC活动通知消息,以上报紧急呼叫的DC呼叫事件给DCSF。Exemplarily, the MMTel AS sends a DC activity notification message to the DCSF to report the DC call event of the emergency call to the DCSF.
S1431,DCSF向发送DC控制请求(DC control request)消息。对应地,DC接收来自DCMF的该DC控制请求消息。S1431, DCSF sends a DC control request message to DC. Correspondingly, DC receives the DC control request message from DCMF.
示例性地,DCSF收到MMTel AS上报的DC呼叫事件之后,确定当前呼叫为紧急呼叫,且ADC不需要锚定到DCMF,则DCSF向MMTel AS下发DC控制请求消息,以指示继续呼叫。For example, after DCSF receives the DC call event reported by MMTel AS, it determines that the current call is an emergency call and the ADC does not need to be anchored to DCMF. Then, DCSF sends a DC control request message to MMTel AS to instruct it to continue the call.
S1432,MMTel AS向S-CSCF发送re-invite请求消息。对应地,S-CSCF接收来自MMTel AS的re-invite请求消息。S1432, MMTel AS sends a re-invite request message to S-CSCF. Correspondingly, S-CSCF receives the re-invite request message from MMTel AS.
示例性地,MMTel AS向S-CSCF转发re-invite请求消息,以协商UE和PSAP之间的ADC#1的描述信息。Exemplarily, the MMTel AS forwards the re-invite request message to the S-CSCF to negotiate the description information of ADC#1 between the UE and the PSAP.
S1433,S-CSCF通过E-CSCF向PSAP发送re-invite请求消息。对应地,PSAP通过E-CSCF接收来自S-CSCF的该re-invite请求消息。S1433, the S-CSCF sends a re-invite request message to the PSAP through the E-CSCF. Correspondingly, the PSAP receives the re-invite request message from the S-CSCF through the E-CSCF.
示例性地,S-CSCF接收来自MMTel AS的re-invite请求消息之后,通过E-CSCF将该re-invite请求消息转发给PSAP。Exemplarily, after receiving the re-invite request message from the MMTel AS, the S-CSCF forwards the re-invite request message to the PSAP through the E-CSCF.
S1434,PSAP通过S-CSCF向MMTel AS发送200响应消息。对应地,MMTel AS通过S-CSCF接收来自PSAP的该200响应消息。S1434, PSAP sends a 200 response message to MMTel AS through S-CSCF. Correspondingly, MMTel AS receives the 200 response message from PSAP through S-CSCF.
示例性地,PSAP接收到re-invite请求消息之后,根据该re-invite请求消息中携带的描述信息完成媒体协商,然后通过S-CSCF向MMTel AS发送200响应消息,该200响应消息中携带ADC SDP answer#1,其中,该ADC SDP answer#1为PSAP协商确定的用于建立PSAP和UE之间的ADC#1的描述信息。Exemplarily, after receiving the re-invite request message, the PSAP completes the media negotiation according to the description information carried in the re-invite request message, and then sends a 200 response message to the MMTel AS through the S-CSCF. The 200 response message carries ADC SDP answer#1, wherein the ADC SDP answer#1 is the description information of ADC#1 determined by the PSAP negotiation for establishing the connection between the PSAP and the UE.
S1435,MMTel AS向S-CSCF发送200响应消息。对应地,S-CSCF接收来自MMTel AS的该200响应消息。S1435, MMTel AS sends a 200 response message to S-CSCF. Correspondingly, S-CSCF receives the 200 response message from MMTel AS.
示例性地,MMTel AS接收来自PSAP的200响应消息之后,将该200响应消息转发给S-CSCF,该200响应响应消息中携带ADC SDP answer#1。Exemplarily, after receiving the 200 response message from the PSAP, the MMTel AS forwards the 200 response message to the S-CSCF, and the 200 response message carries ADC SDP answer#1.
S1436,S-CSCF通过P-CSCF向UE发送200响应消息。对应地,UE通过P-CSCF接收来自S-CSCF的该200响应消息。S1436, the S-CSCF sends a 200 response message to the UE via the P-CSCF. Correspondingly, the UE receives the 200 response message from the S-CSCF via the P-CSCF.
示例性地,S-CSCF接收来自MMTel AS的200响应消息之后,通过P-CSCF将该200响应消息转发给UE。UE从该200响应消息中获取ADC SDP answer#1,从而完成UE和PSAP之间的ADC#1的媒体协商。Exemplarily, after receiving the 200 response message from the MMTel AS, the S-CSCF forwards the 200 response message to the UE through the P-CSCF. The UE obtains ADC SDP answer#1 from the 200 response message, thereby completing the media negotiation of ADC#1 between the UE and the PSAP.
S1437,PSAP和UE之间建立ADC#1。S1437, ADC#1 is established between PSAP and UE.
经过上述描述信息协商流程,完成了主叫UE和PSAP之间的ADC的建立。After the above description information negotiation process, the establishment of ADC between the calling UE and the PSAP is completed.
进一步地,UE和PSAP可以通过建立好的BDC获取DC App,然后UE上的DC App和PSAP上的DC App可以通过建立好的ADC传输信息,具体如S1438-S1442所示。其中S S1438-S1442与方法1200中的S1227-S1230类似,为了简洁,这里不再赘述。Furthermore, the UE and the PSAP can obtain the DC App through the established BDC, and then the DC App on the UE and the DC App on the PSAP can transmit information through the established ADC, as shown in S1438-S1442. S1438-S1442 are similar to S1227-S1230 in method 1200, and are not described here for brevity.
可以理解的是,在方法1400中UE和PSAP获取DC App的流程(即S1438-S1439)可以在BDC创建流程之后(即S1424和S1425之后)的任意时刻执行,本申请不作限定。It can be understood that the process of UE and PSAP obtaining DC App in method 1400 (i.e., S1438-S1439) can be executed at any time after the BDC creation process (i.e., after S1424 and S1425), and this application does not limit it.
图15示出了图10所示的网络架构的另一种方法1500的示例性流程图。在方法2100中,UE在与PSAP之间的紧急通话建立完成之后,发起BDC的建立流程,以减少紧急通话的接通时延。并且在该实施例中,BDC既可以用于下载数据通道应用,又可以用于传输数据通道应用的附加通信信息。即该实施例中可以不建立ADC。下面结合图15中的各个步骤对方法1500作示例性说明。FIG. 15 shows an exemplary flow chart of another method 1500 of the network architecture shown in FIG. 10 . In method 2100 , after the emergency call between UE and PSAP is established, the establishment process of BDC is initiated to reduce the connection delay of the emergency call. And in this embodiment, BDC can be used to download data channel applications and can be used to transmit additional communication information of data channel applications. That is, ADC can not be established in this embodiment. The following is an exemplary description of method 1500 in conjunction with the various steps in FIG. 15 .
在S1501-S1509中,UE通过初始INVITE流程发起紧急呼叫,与PSAP之间建立了IMS会话。具体过程可参考方法1100中S1101-S1109部分的描述,为了简洁,这里不再重复说明。In S1501-S1509, the UE initiates an emergency call through the initial INVITE process and establishes an IMS session with the PSAP. The specific process can be referred to the description of S1101-S1109 in the method 1100, and will not be repeated here for the sake of brevity.
进一步地,UE请求建立BDC,具体过程如S1510-S1525所示。S1510-S1525与方法1300中的S1310-S1325类似,为了简洁,这里不再赘述。Further, the UE requests to establish a BDC, and the specific process is shown in S1510-S1525. S1510-S1525 are similar to S1310-S1325 in method 1300, and are not described here for brevity.
经过上述描述信息协商流程,DCMF分别完成和主叫UE、PSAP之间的BDC的建立。After the above description information negotiation process, DCMF completes the establishment of BDC with the calling UE and PSAP respectively.
进一步地,UE和PSAP可以通过建立好的BDC获取DC App,然后UE上的DC App和PSAP上的DC App可以通过建立好的BDC传输信息。下面结合S1526-S1531进行示例性说明。Furthermore, the UE and the PSAP can obtain the DC App through the established BDC, and then the DC App on the UE and the DC App on the PSAP can transmit information through the established BDC. The following is an exemplary description in conjunction with S1526-S1531.
S1526,UE通过BDC#1从DCMF获取DC App,具体过程本申请不作限定。这里的DC App例如可以是紧急呼叫小程序。
S1526, UE obtains DC App from DCMF via BDC#1, and the specific process is not limited in this application. The DC App here can be, for example, an emergency call applet.
S1527,PSAP通过BDC#2从DCMF获取DC App。可以理解的是,PSAP获取的DC App与UE获取的DC App应相同。S1527, PSAP obtains DC App from DCMF through BDC#2. It is understandable that the DC App obtained by PSAP should be the same as the DC App obtained by UE.
S1528,UE上的DC App通过BDC#1向DCMF发送数据#1,如图片、视频、位置等数据。S1528, the DC App on the UE sends data #1, such as pictures, videos, location and other data, to DCMF through BDC #1.
S1529,DCMF通过BDC#2向PSAP上的DC App发送数据#1。S1529, DCMF sends data #1 to DC App on PSAP through BDC #2.
S1530,PSAP上的DC App通过BDC#2向DCMF发送数据#2。S1530, DC App on PSAP sends data #2 to DCMF through BDC #2.
S1531,DCMF通过BDC#1向UE上的DC App发送数据#2。S1531, DCMF sends data #2 to DC App on UE through BDC #1.
通过上述过程,UE和PSAP可以在下载的DC App内通过建立好的ADC通道传输图片、视频、位置等数据。Through the above process, UE and PSAP can transmit pictures, videos, location and other data through the established ADC channel in the downloaded DC App.
可以理解的是,上述方法1100-1500是以紧急呼叫的场景为例进行说明的,但本申请并不限于此。也就是说,本申请实施例还可以应用于除紧急呼叫以外的其他IMS会话的场景中。在这种情况下,可以将上述实施例中的E-CSCF和PSAP合并看做IMS会话中与UE对应的被叫设备,具体方案可参考上述方法1100-1500中的具体描述,这里不再赘述。It is understandable that the above methods 1100-1500 are described by taking the scenario of emergency call as an example, but the present application is not limited to this. That is to say, the embodiments of the present application can also be applied to the scenarios of other IMS sessions other than emergency calls. In this case, the E-CSCF and PSAP in the above embodiments can be combined and regarded as the called device corresponding to the UE in the IMS session. The specific scheme can refer to the specific description in the above methods 1100-1500, which will not be repeated here.
图16示出了适用于本申请实施例的另一种网络架构图。在图16所示的网络架构中,UE可以通过DCMF与PSAP建立紧急呼叫,并且由E-CSCF控制UE与PSAP之间的数据通道的建立流程。图17至图21所示的方法1700-方法2100适用于图16所示的网络架构,方法1700-方法2100可以与上述方法900对应,即方法1700-方法2100可以看做方法800对应的几种可能的实现方式。具体地,方法9800中的第一通信设备可对应于方法1700-方法2100中的UE,方法800中的第二通信设备可对应于方法1700-方法2100中的PSAP,方法900中的会话控制功能设备可对应于方法1100-方法1500中的E-CSCF。另外,方法900中的第一描述信息可对应于方法1700或方法1800中的BDC SDP offer#1,方法900中的第二描述信息可对应于方法1700或方法1800中的ADC SDP offer#1;或者,方法900中的第一描述信息可对应于方法1900-方法2100中的BDC offer#1。方法1700中的S1702-S1715可对应于方法900中第一数据通道和第二数据通道的建立流程,方法1800中的S1802-S1816可对应于方法900中第一数据通道和第二数据通道的建立流程,方法1900中的S1902-S1915可对应于方法900中第一数据通道的建立流程,方法1900中的S1916-S1929可对应于方法900中第二数据通道的建立流程,方法2000中的S2002-S2015可对应于方法900中第一数据通道的建立流程,方法2000中的S2016-S2025可对应于方法900中第二数据通道的建立流程,方法2100中的S2102-S2115可对应于方法800中第一数据通道的建立流程。Figure 16 shows another network architecture diagram applicable to an embodiment of the present application. In the network architecture shown in Figure 16, the UE can establish an emergency call with the PSAP through the DCMF, and the E-CSCF controls the establishment process of the data channel between the UE and the PSAP. The methods 1700-method 2100 shown in Figures 17 to 21 are applicable to the network architecture shown in Figure 16, and the methods 1700-method 2100 can correspond to the above-mentioned method 900, that is, the methods 1700-method 2100 can be regarded as several possible implementations corresponding to the method 800. Specifically, the first communication device in the method 9800 may correspond to the UE in the method 1700-method 2100, the second communication device in the method 800 may correspond to the PSAP in the method 1700-method 2100, and the session control function device in the method 900 may correspond to the E-CSCF in the method 1100-method 1500. In addition, the first description information in method 900 may correspond to BDC SDP offer#1 in method 1700 or method 1800, and the second description information in method 900 may correspond to ADC SDP offer#1 in method 1700 or method 1800; or, the first description information in method 900 may correspond to BDC offer#1 in methods 1900-method 2100. S1702-S1715 in method 1700 may correspond to the process of establishing the first data channel and the second data channel in method 900, S1802-S1816 in method 1800 may correspond to the process of establishing the first data channel and the second data channel in method 900, S1902-S1915 in method 1900 may correspond to the process of establishing the first data channel in method 900, S1916-S1929 in method 1900 may correspond to the process of establishing the second data channel in method 900, S2002-S2015 in method 2000 may correspond to the process of establishing the first data channel in method 900, S2016-S2025 in method 2000 may correspond to the process of establishing the second data channel in method 900, and S2102-S2115 in method 2100 may correspond to the process of establishing the first data channel in method 800.
图17示出了一种适用于图16所示的网络架构1700的示例性流程图。在方法1700中,UE在与PSAP之间的紧急通话建立完成之后,同时发起BDC和ADC创建流程,以减少紧急通话接通的时延。并且在该实施例中,ADC锚定到DCMF。下面结合图17中的各个步骤对方法1700做示例性说明。FIG. 17 shows an exemplary flow chart applicable to the network architecture 1700 shown in FIG. 16 . In method 1700, after the emergency call between the UE and the PSAP is established, the UE simultaneously initiates the BDC and ADC creation processes to reduce the delay of the emergency call connection. In this embodiment, the ADC is anchored to the DCMF. The method 1700 is exemplarily described below in conjunction with the various steps in FIG. 17 .
S1701a,UE通过初始INVITE流程发起紧急呼叫,与PSAP之间建立IMS会话。S1701a, the UE initiates an emergency call through an initial INVITE process and establishes an IMS session with the PSAP.
本申请不限定UE与PSAP之间建立紧急通话的具体实现方式。作为一种示例,可以通过如7所示的方法700建立UE和PSAP之间的紧急通话。The present application does not limit the specific implementation of establishing an emergency call between the UE and the PSAP. As an example, an emergency call between the UE and the PSAP can be established by the method 700 shown in FIG.
进一步地,UE请求建立BDC和ADC。下面结合S1702-S1715对BDC和ADC的创建流程进行示例性说明。Furthermore, the UE requests to establish a BDC and an ADC. The following is an exemplary description of the creation process of the BDC and the ADC in conjunction with S1702-S1715.
S1701b,PSAP向UE发送摘机200OK响应消息。对应地,UE接收来自PSAP的该摘机200OK响应消息。S1701b, PSAP sends an off-hook 200OK response message to UE. Correspondingly, UE receives the off-hook 200OK response message from PSAP.
S1702,UE向P-CSCF发送re-invite请求消息。对应地,P-CSCF接收来自UE的该re-invite请求消息。S1702, the UE sends a re-invite request message to the P-CSCF. Correspondingly, the P-CSCF receives the re-invite request message from the UE.
示例性地,UE在确定与PSAP之间的紧急通话接通之后,向P-CSCF发送re-invite请求消息,以请求协商建立BDC和ADC。该re-invite请求消息包括BDC SDP offer#1和ADC SDP offer#1。其中,该BDC SDP offer#1为UE用于建立BDC的描述信息,如UE用于对接BDC的IP地址、端口信息、TLS ID和证书、QoS需求等。Exemplarily, after the UE determines that the emergency call with the PSAP is connected, it sends a re-invite request message to the P-CSCF to request negotiation to establish the BDC and ADC. The re-invite request message includes BDC SDP offer#1 and ADC SDP offer#1. Among them, the BDC SDP offer#1 is the description information used by the UE to establish the BDC, such as the IP address, port information, TLS ID and certificate, QoS requirements, etc. used by the UE to connect to the BDC.
关于BDC SDP offer#1和ADC SDP offer#1的示例可参考方法1100中S1110部分的示例,这里不再赘述。For examples of BDC SDP offer#1 and ADC SDP offer#1, please refer to the examples in S1110 of method 1100, which will not be repeated here.
S1703,P-CSCF向E-CSCF发送re-invite请求消息。对应地,E-CSCF接收来自P-CSCF的re-invite请求消息。S1703, the P-CSCF sends a re-invite request message to the E-CSCF. Correspondingly, the E-CSCF receives the re-invite request message from the P-CSCF.
示例性地,P-CSCF接收来自UE的re-invite请求消息之后,将re-INVITE请求消息转发给E-CSCF。Exemplarily, after receiving the re-INVITE request message from the UE, the P-CSCF forwards the re-INVITE request message to the E-CSCF.
S1704,E-CSCF确定触发DC创建流程。S1704: E-CSCF determines to trigger the DC creation process.
示例性地,E-CSCF接收来自S-CSCF的re-invite请求消息之后,在发现该re-invite请求消息携带有
DC描述信息(即上述BDC SDP offer#1和ADC SDP offer#1),并确定UE支持DC(可以是在初始INVITE流程确定UE支持DC,也可以是根据re-invite请求消息携带的DC能力指示信息确定UE支持DC)的情况下,确定触发DC创建流程,即则触发DC呼叫事件上报(具体可见S1705)。For example, after receiving the re-invite request message from the S-CSCF, the E-CSCF finds that the re-invite request message carries Based on the DC description information (i.e., the above-mentioned BDC SDP offer#1 and ADC SDP offer#1), and determining that the UE supports DC (it can be that the UE supports DC during the initial INVITE process, or it can be that the UE supports DC based on the DC capability indication information carried in the re-invite request message), it is determined to trigger the DC creation process, i.e., trigger the DC call event report (see S1705 for details).
S1705,E-CSCF向DCSF发送DC活动通知(DC event notify)消息。对应地,DCSF接收来自E-CSCF的该DC活动通知消息。S1705, E-CSCF sends a DC event notify message to DCSF. Correspondingly, DCSF receives the DC event notify message from E-CSCF.
示例性地,E-CSCF向DCMF发送DC活动通知消息,以上报紧急呼叫的DC呼叫事件给DCSF。Exemplarily, the E-CSCF sends a DC activity notification message to the DCMF to report a DC call event of the emergency call to the DCSF.
S1706,DCSF向发送DC控制请求(DC control request)消息。对应地,DC接收来自DCMF的该DC控制请求消息。S1706: DCSF sends a DC control request message to DC. Correspondingly, DC receives the DC control request message from DCMF.
示例性地,DCSF收到E-CSCF上报的DC呼叫事件之后,确定当前呼叫为紧急呼叫,且ADC需要锚定到DCMF,则DCSF向E-CSCF下发DC控制请求消息,以申请BDC和ADC通道资源。Exemplarily, after receiving the DC call event reported by the E-CSCF, the DCSF determines that the current call is an emergency call and the ADC needs to be anchored to the DCMF, then the DCSF sends a DC control request message to the E-CSCF to apply for BDC and ADC channel resources.
S1707,E-CSCF向DCMF发送资源请求消息。对应地,DCMF接收来自E-CSCF的该资源请求消息。S1707, the E-CSCF sends a resource request message to the DCMF. Correspondingly, the DCMF receives the resource request message from the E-CSCF.
示例性地,E-CSCF接收来自DCSF的DC控制请求消息之后,向DCMF申请BDC和ADC通道资源。例如,E-CSCF向DCMF发送资源请求消息,该资源请求消息包括BDC SDP offer#1和ADC SDP offer#1,该资源请求消息用于请求获取DCMF用于创建BDC和ADC的描述信息。Exemplarily, after receiving the DC control request message from DCSF, E-CSCF applies to DCMF for BDC and ADC channel resources. For example, E-CSCF sends a resource request message to DCMF, the resource request message including BDC SDP offer#1 and ADC SDP offer#1, and the resource request message is used to request DCMF to obtain description information for creating BDC and ADC.
S1708,DCMF向E-CSCF发送资源响应消息。对应地,E-CSCF接收来自DCMF的该资源响应消息。S1708: DCMF sends a resource response message to E-CSCF. Correspondingly, E-CSCF receives the resource response message from DCMF.
示例性地,接收来自E-CSCF的资源请求消息之后,DCMF基于BDC SDP offer#1和ADC SDP offer#1进行媒体协商,确定用于创建UE和DCMF之间的BDC(记为BDC#1)和ADC(记为ADC#1)的描述信息,并分配用于创建PSAP和DCMF之间的BDC(记为BDC#2)和ADC(记为ADC#2)的描述信息。Exemplarily, after receiving the resource request message from the E-CSCF, the DCMF performs media negotiation based on the BDC SDP offer#1 and the ADC SDP offer#1, determines the description information for creating the BDC (denoted as BDC#1) and the ADC (denoted as ADC#1) between the UE and the DCMF, and allocates the description information for creating the BDC (denoted as BDC#2) and the ADC (denoted as ADC#2) between the PSAP and the DCMF.
进一步地,DCMF向E-CSCF发送资源响应消息,该资源响应消息包括BDC SDP answer#1、ADC SDP answer#1、BDC SDP offer#2和ADC SDP offer#2。其中,BDC SDP answer#1为DCMF协商确定的用于创建UE和DCMF之间的BDC#1的描述信息,ADC SDP answer#1为DCMF协商确定的用于创建UE和DCMF之间的ADC#1的描述信息;BDC SDP offer#2为DCMF分配的用于创建PSAP和DCMF之间的BDC#2的描述信息,ADC SDP offer#2为DCMF分配的用于创建PSAP和DCMF之间的ADC#2的描述信息。Further, DCMF sends a resource response message to E-CSCF, and the resource response message includes BDC SDP answer#1, ADC SDP answer#1, BDC SDP offer#2 and ADC SDP offer#2. Among them, BDC SDP answer#1 is the description information of BDC#1 determined by DCMF negotiation for creating UE and DCMF, and ADC SDP answer#1 is the description information of ADC#1 determined by DCMF negotiation for creating UE and DCMF; BDC SDP offer#2 is the description information of BDC#2 allocated by DCMF for creating PSAP and DCMF, and ADC SDP offer#2 is the description information of ADC#2 allocated by DCMF for creating PSAP and DCMF.
S1709,E-CSCF向PSAP发送re-invite请求消息。对应地,PSAP接收来自E-CSCF的该re-invite请求消息。S1709, the E-CSCF sends a re-invite request message to the PSAP. Correspondingly, the PSAP receives the re-invite request message from the E-CSCF.
示例性地,E-CSCF接收来自DCMF的资源响应消息之后,向PSAP发送re-invite请求消息,并在该re-invite请求消息中携带BDC SDP offer#2和ADC SDP offer#2,以协商DCMF和PSAP之间的BDC#2和ADC#2的描述信息。Exemplarily, after receiving the resource response message from DCMF, E-CSCF sends a re-invite request message to PSAP, and carries BDC SDP offer#2 and ADC SDP offer#2 in the re-invite request message to negotiate the description information of BDC#2 and ADC#2 between DCMF and PSAP.
S1710,PSAP向MMTel AS发送200响应消息。对应地,E-CSCF接收来自PSAP的该200响应消息。S1710, PSAP sends a 200 response message to MMTel AS. Correspondingly, E-CSCF receives the 200 response message from PSAP.
示例性地,PSAP接收到re-invite请求消息之后,根据该re-invite请求消息中携带的描述信息完成媒体协商,然后向E-CSCF发送200响应消息,该200响应消息中携带BDC SDP answer#2和ADC SDP answer#2,其中,该BDC SDP answer#2为PSAP协商确定的用于建立PSAP和DCMF之间的BDC#2的描述信息,该ADC SDP answer#2为PSAP协商确定的用于建立PSAP和DCMF之间的ADC#2的描述信息。Exemplarily, after receiving the re-invite request message, the PSAP completes the media negotiation according to the description information carried in the re-invite request message, and then sends a 200 response message to the E-CSCF, wherein the 200 response message carries BDC SDP answer#2 and ADC SDP answer#2, wherein the BDC SDP answer#2 is the description information of BDC#2 determined by the PSAP through negotiation for establishing the connection between the PSAP and the DCMF, and the ADC SDP answer#2 is the description information of ADC#2 determined by the PSAP through negotiation for establishing the connection between the PSAP and the DCMF.
S1711,E-CSCF向DCMF发送BDC SDP answer#2和ADC SDP answer#2。对应地,DCMF接收来自E-CSCF的BDC SDP answer#2和ADC SDP answer#2。S1711, E-CSCF sends BDC SDP answer#2 and ADC SDP answer#2 to DCMF. Correspondingly, DCMF receives BDC SDP answer#2 and ADC SDP answer#2 from E-CSCF.
示例性地,E-CSCF接收来自PSAP的200响应消息之后,从该200响应消息中获取BDC SDP answer#2和ADC SDP answer#2,然后将该BDC SDP answer#2和ADC SDP answer#2发送给DCMF,完成PSAP和DCMF之间的BDC#2和ADC#2的媒体协商。Exemplarily, after receiving the 200 response message from the PSAP, the E-CSCF obtains the BDC SDP answer#2 and the ADC SDP answer#2 from the 200 response message, and then sends the BDC SDP answer#2 and the ADC SDP answer#2 to the DCMF to complete the media negotiation of BDC#2 and ADC#2 between the PSAP and the DCMF.
S1712,E-CSCF向P-CSCF发送200响应消息。对应地,P-CSCF接收来自E-CSCF的该200响应消息。S1712, the E-CSCF sends a 200 response message to the P-CSCF. Correspondingly, the P-CSCF receives the 200 response message from the E-CSCF.
示例性地,E-CSCF接收来自DCMF的资源响应消息之后,从该资源响应消息中获取BDC SDP answer#1和ADC SDP answer#1,然后向P-CSCF发送200响应消息,并在该200响应消息中携带该BDC SDP answer#1和ADC SDP answer#1。Exemplarily, after receiving the resource response message from DCMF, E-CSCF obtains BDC SDP answer#1 and ADC SDP answer#1 from the resource response message, and then sends a 200 response message to P-CSCF, and carries the BDC SDP answer#1 and ADC SDP answer#1 in the 200 response message.
可以理解的是,本申请不限定E-CSCF执行S1709和S1712的先后顺序。It is understandable that the present application does not limit the order in which the E-CSCF executes S1709 and S1712.
S1713,P-CSCF向UE发送200响应消息。对应地,UE接收来自P-CSCF的该200响应消息。
S1713, the P-CSCF sends a 200 response message to the UE. Correspondingly, the UE receives the 200 response message from the P-CSCF.
示例性地,P-CSCF接收来自E-CSCF的200响应消息之后,将该200响应消息转发给UE。UE从该200响应消息中获取BDC SDP answer#1和ADC SDP answer#1,从而完成UE和DCMF之间的BDC#1和ADC#1的媒体协商。Exemplarily, after receiving the 200 response message from the E-CSCF, the P-CSCF forwards the 200 response message to the UE. The UE obtains BDC SDP answer#1 and ADC SDP answer#1 from the 200 response message, thereby completing the media negotiation of BDC#1 and ADC#1 between the UE and the DCMF.
S1714,DCMF和UE之间建立BDC#1和ADC#1。S1714: BDC#1 and ADC#1 are established between the DCMF and the UE.
S1715,DCMF和PSAP之间建立BDC#2和ADC#2。S1715, BDC#2 and ADC#2 are established between DCMF and PSAP.
经过上述描述信息协商流程,DCMF分别完成和主叫UE、PSAP之间的BDC和ADC的建立。After the above description information negotiation process, DCMF completes the establishment of BDC and ADC with the calling UE and PSAP respectively.
进一步地,UE和PSAP可以通过建立好的BDC获取DC App,然后UE上的DC App和PSAP上的DC App可以通过建立好的ADC传输信息,下面结合S1716-S1721进行示例性说明。Furthermore, the UE and PSAP can obtain the DC App through the established BDC, and then the DC App on the UE and the DC App on the PSAP can transmit information through the established ADC. The following is an exemplary explanation in combination with S1716-S1721.
S1716,UE通过BDC#1从DCMF获取DC App,具体过程本申请不作限定。这里的DC App例如可以是紧急呼叫小程序。S1716, UE obtains DC App from DCMF through BDC#1. The specific process is not limited in this application. The DC App here can be, for example, an emergency call applet.
S1717,PSAP通过BDC#2从DCMF获取DC App。可以理解的是,PSAP获取的DC App与UE获取的DC App应相同。S1717, PSAP obtains DC App from DCMF through BDC#2. It is understandable that the DC App obtained by PSAP should be the same as the DC App obtained by UE.
S1718,UE上的DC App通过ADC#1向DCMF发送数据#1,如图片、视频、位置等数据。S1718, the DC App on the UE sends data #1, such as pictures, videos, locations, and other data, to the DCMF through ADC #1.
S1719,DCMF通过ADC#2向PSAP上的DC App发送数据#1。S1719, DCMF sends data #1 to DC App on PSAP through ADC #2.
S1820,PSAP上的DC App通过ADC#2向DCMF发送数据#2。S1820, DC App on PSAP sends data #2 to DCMF via ADC #2.
S1821,DCMF通过ADC#1向UE上的DC App发送数据#2。S1821, DCMF sends data #2 to DC App on UE through ADC #1.
通过上述过程,UE和PSAP可以在下载的DC App内通过建立好的ADC通道传输图片、视频、位置等数据。Through the above process, UE and PSAP can transmit pictures, videos, location and other data through the established ADC channel in the downloaded DC App.
图18示出了一种适用于图16所示的网络架构的另一种方法1800的示例性流程图。在方法1800中,UE在与PSAP之间的紧急通话建立完成之后,同时发起BDC和ADC创建流程,以减少紧急通话接通的时延。并且在该实施例中,ADC不锚定到DCMF。下面结合图18中的各个步骤对方法1800做示例性说明。FIG. 18 shows an exemplary flow chart of another method 1800 applicable to the network architecture shown in FIG. 16 . In method 1800, after the emergency call between the UE and the PSAP is established, the UE simultaneously initiates the BDC and ADC creation processes to reduce the delay of the emergency call connection. In this embodiment, the ADC is not anchored to the DCMF. The method 1800 is exemplarily described below in conjunction with the various steps in FIG. 18 .
S1801a,UE通过初始INVITE流程发起紧急呼叫,与PSAP之间建立IMS会话。S1801a, the UE initiates an emergency call through an initial INVITE process and establishes an IMS session with the PSAP.
S1801b,PSAP向UE发送摘机200OK响应消息。对应地,UE接收来自PSAP的该摘机200OK响应消息。S1801b, PSAP sends an off-hook 200OK response message to UE. Correspondingly, UE receives the off-hook 200OK response message from PSAP.
本申请不限定UE与PSAP之间建立紧急通话的具体实现方式。作为一种示例,可以通过如7所示的方法700建立UE和PSAP之间的紧急通话。The present application does not limit the specific implementation of establishing an emergency call between the UE and the PSAP. As an example, an emergency call between the UE and the PSAP can be established by the method 700 shown in FIG.
进一步地,UE请求建立BDC和ADC。下面结合S1802-S1815对BDC和ADC的创建流程进行示例性说明。Furthermore, the UE requests to establish a BDC and an ADC. The following is an exemplary description of the creation process of the BDC and the ADC in conjunction with S1802-S1815.
S1802,UE向P-CSCF发送re-invite请求消息。对应地,P-CSCF接收来自UE的该re-invite请求消息。S1802, the UE sends a re-invite request message to the P-CSCF. Correspondingly, the P-CSCF receives the re-invite request message from the UE.
示例性地,UE在确定与PSAP之间的紧急通话接通之后,向P-CSCF发送re-invite请求消息,以请求协商建立BDC和ADC。该re-invite请求消息包括BDC SDP offer#1和ADC SDP offer#1。其中,该BDC SDP offer#1为UE用于建立BDC的描述信息,如UE用于对接BDC的IP地址、端口信息、TLS ID和证书、QoS需求等。Exemplarily, after the UE determines that the emergency call with the PSAP is connected, it sends a re-invite request message to the P-CSCF to request negotiation to establish the BDC and ADC. The re-invite request message includes BDC SDP offer#1 and ADC SDP offer#1. Among them, the BDC SDP offer#1 is the description information used by the UE to establish the BDC, such as the IP address, port information, TLS ID and certificate, QoS requirements, etc. used by the UE to connect to the BDC.
关于BDC SDP offer#1和ADC SDP offer#1的示例可参考方法1200中S1210部分的示例,这里不再赘述。For examples of BDC SDP offer#1 and ADC SDP offer#1, please refer to the examples in S1210 of method 1200, which will not be repeated here.
S1803,P-CSCF向E-CSCF发送re-invite请求消息,该re-invite请求消息包括BDC SDP offer#1和ADC SDP offer#1。对应地,E-CSCF接收来自P-CSCF的re-invite请求消息。S1803, P-CSCF sends a re-invite request message to E-CSCF, where the re-invite request message includes BDC SDP offer#1 and ADC SDP offer#1. Correspondingly, E-CSCF receives the re-invite request message from P-CSCF.
可选地,S1804,MMTel AS确定触发DC创建流程。Optionally, S1804, MMTel AS determines to trigger the DC creation process.
S1803-S1804与方法1700中的S703-S1704类似,区别在于re-invite请求消息中携带的描述信息不同。为了简洁,这里不再赘述。S1803-S1804 are similar to S703-S1704 in method 1700, except that the description information carried in the re-invite request message is different, which will not be described here for brevity.
S1805,E-CSCF向DCSF发送DC活动通知(DC event notify)消息,以上报紧急呼叫的DC呼叫事件给DCSF。对应地,DCMF接收来自E-CSCF的该DC活动通知消息。S1805, E-CSCF sends a DC event notify message to DCSF to report the DC call event of the emergency call to DCSF. Correspondingly, DCMF receives the DC event notify message from E-CSCF.
S1806,DCSF向发送DC控制请求(DC control request)消息。对应地,DC接收来自DCSF的该DC控制请求消息。S1806, DCSF sends a DC control request message to DC. Correspondingly, DC receives the DC control request message from DCSF.
示例性地,DCSF收到E-CSCF上报的DC呼叫事件之后,确定当前呼叫为紧急呼叫,且ADC不锚定到DCMF,则DCSF向E-CSCF下发DC控制请求消息,以申请BDC通道资源(不需要申请ADC通道资源)。
Exemplarily, after receiving the DC call event reported by E-CSCF, DCSF determines that the current call is an emergency call and the ADC is not anchored to DCMF, then DCSF sends a DC control request message to E-CSCF to apply for BDC channel resources (no need to apply for ADC channel resources).
S1807,E-CSCF向DCMF发送资源请求消息。对应地,DCMF接收来自E-CSCF的该资源请求消息。S1807, the E-CSCF sends a resource request message to the DCMF. Correspondingly, the DCMF receives the resource request message from the E-CSCF.
示例性地,E-CSCF接收来自DCSF的DC控制请求消息之后,向DCMF申请BDC通道资源。例如,E-CSCF向DCMF发送资源请求消息,该资源请求消息包括BDC SDP offer#1,该资源请求消息用于请求获取DCMF用于创建BDC的描述信息。Exemplarily, after receiving the DC control request message from DCSF, E-CSCF applies for BDC channel resources from DCMF. For example, E-CSCF sends a resource request message to DCMF, the resource request message including BDC SDP offer#1, and the resource request message is used to request DCMF to obtain description information for creating BDC.
S1808,DCMF向E-CSCF发送资源响应消息。对应地,E-CSCF接收来自DCMF的该资源响应消息。S1808: DCMF sends a resource response message to E-CSCF. Correspondingly, E-CSCF receives the resource response message from DCMF.
示例性地,接收来自E-CSCF的资源请求消息之后,DCMF基于BDC SDP offer#1进行媒体协商,确定用于创建UE和DCMF之间的BDC(记为BDC#1)的描述信息,并分配用于创建PSAP和DCMF之间的BDC(记为BDC#2)和ADC(记为ADC#2)的描述信息。Exemplarily, after receiving the resource request message from the E-CSCF, the DCMF performs media negotiation based on the BDC SDP offer#1, determines the description information for creating the BDC (denoted as BDC#1) between the UE and the DCMF, and allocates the description information for creating the BDC (denoted as BDC#2) and ADC (denoted as ADC#2) between the PSAP and the DCMF.
进一步地,DCMF向E-CSCF发送资源响应消息,该资源响应消息包括BDC SDP answer#1和BDC SDP offer#2。其中,BDC SDP answer#1为DCMF协商确定的用于创建UE和DCMF之间的BDC#1的描述信息;BDC SDP offer#2为DCMF分配的用于创建PSAP和DCMF之间的BDC#2的描述信息。Further, DCMF sends a resource response message to E-CSCF, and the resource response message includes BDC SDP answer#1 and BDC SDP offer#2. BDC SDP answer#1 is the description information of BDC#1 determined by DCMF negotiation for establishing BDC#1 between UE and DCMF; BDC SDP offer#2 is the description information of BDC#2 allocated by DCMF for establishing BDC#2 between PSAP and DCMF.
S1809,E-CSCF向PSAP发送re-invite请求消息。对应地,PSAP接收来自E-CSCF的re-invite请求消息。S1809, the E-CSCF sends a re-invite request message to the PSAP. Correspondingly, the PSAP receives the re-invite request message from the E-CSCF.
示例性地,E-CSCF接收来自DCMF的资源响应消息之后,向PSAP发送re-invite请求消息,并在该re-invite请求消息中携带ADC SDP offer#1和BDC SDP offer#2,以协商UE和PSAP之间的ADC#1的描述信息,以及DCMF和PSAP之间的BDC#2的描述信息。Exemplarily, after receiving the resource response message from DCMF, E-CSCF sends a re-invite request message to PSAP, and carries ADC SDP offer#1 and BDC SDP offer#2 in the re-invite request message to negotiate the description information of ADC#1 between UE and PSAP, and the description information of BDC#2 between DCMF and PSAP.
关于BDC SDP offer#2和ADC SDP offer#1的示例可参考方法1200中的S1218部分的示例。For examples of BDC SDP offer#2 and ADC SDP offer#1, please refer to the example in part S1218 of method 1200.
S1810,PSAP通过向E-CSCF发送200响应消息。对应地,E-CSCF接收来自PSAP的该200响应消息。S1810, the PSAP sends a 200 response message to the E-CSCF. Correspondingly, the E-CSCF receives the 200 response message from the PSAP.
示例性地,PSAP接收到re-invite请求消息之后,根据该re-invite请求消息中携带的描述信息完成媒体协商,然后向E-CSCF发送200响应消息,该200响应消息中携带ADC SDP answer#1和BDC SDP answer#2,其中,该ADC SDP answer#1为PSAP协商确定的用于建立PSAP和UE之间的ADC的描述信息,该BDC SDP answer#2为PSAP协商确定的用于建立PSAP和DCMF之间的BDC#2的描述信息。Exemplarily, after receiving the re-invite request message, the PSAP completes the media negotiation according to the description information carried in the re-invite request message, and then sends a 200 response message to the E-CSCF. The 200 response message carries ADC SDP answer#1 and BDC SDP answer#2, wherein the ADC SDP answer#1 is the description information determined by the PSAP negotiation for establishing the ADC between the PSAP and the UE, and the BDC SDP answer#2 is the description information determined by the PSAP negotiation for establishing the BDC#2 between the PSAP and the DCMF.
S1811,E-CSCF向DCMF发送BDC SDP answer#2。对应地,DCMF接收来自E-CSCF的BDC SDP answer#2。S1811, E-CSCF sends BDC SDP answer#2 to DCMF. Correspondingly, DCMF receives BDC SDP answer#2 from E-CSCF.
示例性地,E-CSCF接收来自PSAP的200响应消息之后,从该200响应消息中获取BDC SDP answer#2,然后将该BDC SDP answer#2发送给DCMF,完成PSAP和DCMF之间的BDC#2的媒体协商。Exemplarily, after receiving the 200 response message from the PSAP, the E-CSCF obtains the BDC SDP answer#2 from the 200 response message, and then sends the BDC SDP answer#2 to the DCMF to complete the media negotiation of BDC#2 between the PSAP and the DCMF.
S1812,E-CSCF向P-CSCF发送200响应消息。对应地,P-CSCF接收来自E-CSCF的该200响应消息。S1812, the E-CSCF sends a 200 response message to the P-CSCF. Correspondingly, the P-CSCF receives the 200 response message from the E-CSCF.
示例性地,E-CSCF接收来自DCMF的资源响应消息,以及来自PSAP的200响应消息之后,从该资源响应消息中获取BDC SDP answer#1,从该200响应消息中获取ADC SDP answer#1,然后向P-CSCF发送200响应消息,并在该200响应消息中携带该BDC SDP answer#1和ADC SDP answer#1。Exemplarily, after receiving the resource response message from DCMF and the 200 response message from PSAP, E-CSCF obtains BDC SDP answer#1 from the resource response message, obtains ADC SDP answer#1 from the 200 response message, and then sends a 200 response message to P-CSCF, and carries the BDC SDP answer#1 and ADC SDP answer#1 in the 200 response message.
S1813,P-CSCF向UE发送200响应消息。对应地,UE接收来自P-CSCF的该200响应消息。S1813, the P-CSCF sends a 200 response message to the UE. Correspondingly, the UE receives the 200 response message from the P-CSCF.
示例性地,P-CSCF接收来自E-CSCF的200响应消息之后,将该200响应消息转发给UE。UE从该200响应消息中获取BDC SDP answer#1和ADC SDP answer#1,从而完成UE和DCMF之间的BDC#1的媒体协商,以及UE和PSAP之间的ADC#1的媒体协商。Exemplarily, after receiving the 200 response message from the E-CSCF, the P-CSCF forwards the 200 response message to the UE. The UE obtains BDC SDP answer#1 and ADC SDP answer#1 from the 200 response message, thereby completing the media negotiation of BDC#1 between the UE and the DCMF, and the media negotiation of ADC#1 between the UE and the PSAP.
S1814,DCMF和UE之间建立BDC#1。S1814, BDC#1 is established between DCMF and UE.
S1815,DCMF和PSAP之间建立BDC#2。S1815, BDC#2 is established between DCMF and PSAP.
S1816,UE和PSAP之间建立ADC#1。S1816, ADC#1 is established between the UE and the PSAP.
经过上述描述信息协商流程,DCMF分别完成和主叫UE、PSAP之间的BDC的建立。UE完成可和PSAP之间的ADC的建立。After the above description information negotiation process, DCMF completes the establishment of BDC with the calling UE and PSAP respectively. UE completes the establishment of ADC with PSAP.
进一步地,UE和PSAP可以通过建立好的BDC获取DC App,然后UE上的DC App和PSAP上的DC App可以通过建立好的ADC传输信息。下面结合S1817-S1820进行示例性说明。Furthermore, the UE and the PSAP can obtain the DC App through the established BDC, and then the DC App on the UE and the DC App on the PSAP can transmit information through the established ADC. The following is an exemplary description in conjunction with S1817-S1820.
S1817,UE通过BDC#1从DCMF获取DC App,具体过程本申请不作限定。这里的DC App例如可以是紧急呼叫小程序。S1817, UE obtains DC App from DCMF through BDC#1. The specific process is not limited in this application. The DC App here can be, for example, an emergency call applet.
S1828,PSAP通过BDC#2从DCMF获取DC App。可以理解的是,PSAP获取的DC App与UE获取的DC App应相同。S1828, PSAP obtains DC App from DCMF through BDC#2. It is understandable that the DC App obtained by PSAP should be the same as the DC App obtained by UE.
S1829,UE上的DC App通过ADC#1向PSAP上的DC App发送数据#1,如图片、视频、位置等数
据。S1829, the DC App on the UE sends data #1, such as pictures, videos, locations, etc., to the DC App on the PSAP via ADC #1. according to.
S1830,PSAP上的DC App通过ADC#1向UE上的DC App发送数据#2。S1830, the DC App on the PSAP sends data #2 to the DC App on the UE through ADC #1.
通过上述过程,UE和PSAP可以在下载的DC App内通过建立好的ADC通道传输图片、视频、位置等数据。Through the above process, UE and PSAP can transmit pictures, videos, location and other data through the established ADC channel in the downloaded DC App.
图19示出了适用于图16所示的网络架构的另一种方法1900的示例性流程图。在方法1900中,UE在与PSAP之间的紧急通话建立完成之后,再分别发起BDC的建立流程以及ADC的建立流程,以减少紧急通话的接通时延。并且在该实施例中,ADC锚定到DCMF。下面结合图19中的各个步骤对方法1900作示例性说明。FIG. 19 shows an exemplary flow chart of another method 1900 applicable to the network architecture shown in FIG. 16 . In method 1900, after the emergency call between the UE and the PSAP is established, the UE initiates the establishment process of the BDC and the establishment process of the ADC respectively to reduce the connection delay of the emergency call. And in this embodiment, the ADC is anchored to the DCMF. The method 1900 is exemplarily described below in conjunction with the various steps in FIG. 19 .
S1901a,UE通过初始INVITE流程发起紧急呼叫,与PSAP之间建立IMS会话。S1901a, the UE initiates an emergency call through an initial INVITE process and establishes an IMS session with the PSAP.
S1901b,PSAP向UE发送摘机200OK响应消息。对应地,UE接收来自PSAP的该摘机200OK响应消息。S1901b, PSAP sends an off-hook 200OK response message to UE. Correspondingly, UE receives the off-hook 200OK response message from PSAP.
本申请不限定UE与PSAP之间建立紧急通话的具体实现方式。作为一种示例,可以通过如7所示的方法700建立UE和PSAP之间的紧急通话。The present application does not limit the specific implementation of establishing an emergency call between the UE and the PSAP. As an example, an emergency call between the UE and the PSAP can be established by the method 700 shown in FIG.
进一步地,UE请求建立BDC。下面结合S1902-S1915对BDC的创建流程进行说明。Furthermore, the UE requests to establish a BDC. The creation process of the BDC is described below in conjunction with S1902-S1915.
S1902,UE向P-CSCF发送re-invite请求消息。对应地,P-CSCF接收来自UE的该re-invite请求消息。S1902, the UE sends a re-invite request message to the P-CSCF. Correspondingly, the P-CSCF receives the re-invite request message from the UE.
示例性地,UE在确定与PSAP之间的紧急通话接通之后,向P-CSCF发送re-invite请求消息,以请求协商建立BDC。该re-invite请求消息包括BDC SDP offer#1。其中,该BDC SDP offer#1为UE用于建立BDC的描述信息,如UE用于对接BDC的IP地址、端口信息、TLS ID和证书、QoS需求等。Exemplarily, after confirming that the emergency call with the PSAP is connected, the UE sends a re-invite request message to the P-CSCF to request negotiation to establish a BDC. The re-invite request message includes BDC SDP offer#1. The BDC SDP offer#1 is the description information used by the UE to establish the BDC, such as the IP address, port information, TLS ID and certificate, QoS requirements, etc. used by the UE to connect to the BDC.
关于BDC SDP offer#1和ADC SDP offer#1的示例可参考方法1300中S1310部分的示例,这里不再赘述。For examples of BDC SDP offer#1 and ADC SDP offer#1, please refer to the examples in S1310 of method 1300, which will not be repeated here.
S1903,P-CSCF向E-CSCF发送re-invite请求消息。对应地,E-CSCF接收来自P-CSCF的re-invite请求消息。S1903, the P-CSCF sends a re-invite request message to the E-CSCF. Correspondingly, the E-CSCF receives the re-invite request message from the P-CSCF.
示例性地,P-CSCF接收来自UE的re-invite请求消息之后,将re-INVITE请求消息转发给E-CSCF。Exemplarily, after receiving the re-INVITE request message from the UE, the P-CSCF forwards the re-INVITE request message to the E-CSCF.
可选地,S1904,E-CSCF确定触发BDC创建流程。Optionally, at S1904, the E-CSCF determines to trigger a BDC creation process.
示例性地,E-CSCF接收来自P-CSCF的re-invite请求消息之后,在发现该re-invite请求消息携带有BDC描述信息(即上述BDC SDP offer#1),并确定UE支持DC的情况下,确定触发BDC创建流程,即则触发DC呼叫事件上报(具体可见S1905)。Exemplarily, after receiving the re-invite request message from the P-CSCF, if the E-CSCF finds that the re-invite request message carries BDC description information (i.e., the above-mentioned BDC SDP offer#1) and determines that the UE supports DC, it determines to trigger the BDC creation process, that is, trigger the DC call event report (see S1905 for details).
S1905,E-CSCF向DCSF发送DC活动通知(DC event notify)消息。对应地,DCSF接收来自E-CSCF的该DC活动通知消息。S1905, E-CSCF sends a DC event notify message to DCSF. Correspondingly, DCSF receives the DC event notify message from E-CSCF.
示例性地,E-CSCF向DCSF发送DC活动通知消息,以上报紧急呼叫的DC呼叫事件给DCSF。Exemplarily, the E-CSCF sends a DC activity notification message to the DCSF to report a DC call event of the emergency call to the DCSF.
S1906,DCSF向E-CSCF发送DC控制请求(DC control request)消息。对应地,E-CSCF接收来自DCSF的该DC控制请求消息。S1906: DCSF sends a DC control request message to E-CSCF. Correspondingly, E-CSCF receives the DC control request message from DCSF.
示例性地,DCSF收到E-CSCF上报的DC呼叫事件之后,确定当前呼叫为紧急呼叫,则DCSF向E-CSCF下发DC控制请求消息,以申请BDC通道资源。Exemplarily, after receiving the DC call event reported by the E-CSCF, the DCSF determines that the current call is an emergency call, and then sends a DC control request message to the E-CSCF to apply for BDC channel resources.
S1907,E-CSCF向DCMF发送资源请求消息。对应地,DCMF接收来自E-CSCF的该资源请求消息。S1907, the E-CSCF sends a resource request message to the DCMF. Correspondingly, the DCMF receives the resource request message from the E-CSCF.
示例性地,E-CSCF接收来自DCSF的DC控制请求消息之后,向DCMF申请BDC通道资源。例如,E-CSCF向DCMF发送资源请求消息,该资源请求消息包括BDC SDP offer#1,该资源请求消息用于请求获取DCMF用于创建BDC的描述信息。Exemplarily, after receiving the DC control request message from DCSF, E-CSCF applies for BDC channel resources from DCMF. For example, E-CSCF sends a resource request message to DCMF, the resource request message including BDC SDP offer#1, and the resource request message is used to request DCMF to obtain description information for creating BDC.
S1908,DCMF向E-CSCF发送资源响应消息。对应地,E-CSCF接收来自DCMF的该资源响应消息。S1908, DCMF sends a resource response message to E-CSCF. Correspondingly, E-CSCF receives the resource response message from DCMF.
示例性地,接收来自E-CSCF的资源请求消息之后,DCMF基于BDC SDP offer#1进行媒体协商,确定用于创建UE和DCMF之间的BDC(记为BDC#1)的描述信息,并分配用于创建PSAP和DCMF之间的BDC(记为BDC#2)的描述信息。Exemplarily, after receiving the resource request message from the E-CSCF, the DCMF performs media negotiation based on the BDC SDP offer#1, determines the description information for creating the BDC between the UE and the DCMF (denoted as BDC#1), and allocates the description information for creating the BDC between the PSAP and the DCMF (denoted as BDC#2).
进一步地,DCMF向E-CSCF发送资源响应消息,该资源响应消息包括BDC SDP answer#1和BDC SDP offer#2。其中,BDC SDP answer#1为DCMF协商确定的用于创建UE和DCMF之间的BDC#1的描述信息;BDC SDP offer#2为DCMF分配的用于创建PSAP和DCMF之间的BDC#2的描述信息。Further, DCMF sends a resource response message to E-CSCF, and the resource response message includes BDC SDP answer#1 and BDC SDP offer#2. BDC SDP answer#1 is the description information of BDC#1 determined by DCMF negotiation for establishing BDC#1 between UE and DCMF; BDC SDP offer#2 is the description information of BDC#2 allocated by DCMF for establishing BDC#2 between PSAP and DCMF.
S1909,E-CSCF向PSAP发送re-invite请求消息。对应地,PSAP接收来自E-CSCF的re-invite请求消息。S1909, the E-CSCF sends a re-invite request message to the PSAP. Correspondingly, the PSAP receives the re-invite request message from the E-CSCF.
示例性地,E-CSCF接收来自DCMF的资源响应消息之后,向PSAP发送re-invite请求消息,并在该
re-invite请求消息中携带BDC SDP offer#2,以协商DCMF和PSAP之间的BDC#2的描述信息。Exemplarily, after receiving the resource response message from DCMF, E-CSCF sends a re-invite request message to PSAP and The re-invite request message carries BDC SDP offer#2 to negotiate the description information of BDC#2 between DCMF and PSAP.
S1910,PSAP通向E-CSCF发送200响应消息。对应地,E-CSCF接收来自PSAP的该200响应消息。S1910, PSAP sends a 200 response message to E-CSCF. Correspondingly, E-CSCF receives the 200 response message from PSAP.
示例性地,PSAP接收到re-invite请求消息之后,根据该re-invite请求消息中携带的描述信息完成媒体协商,然后向E-CSCF发送200响应消息,该200响应消息中携带BDC SDP answer#2,其中,该BDC SDP answer#2为PSAP协商确定的用于建立PSAP和DCMF之间的BDC#2的描述信息。Exemplarily, after receiving the re-invite request message, the PSAP completes the media negotiation according to the description information carried in the re-invite request message, and then sends a 200 response message to the E-CSCF. The 200 response message carries BDC SDP answer#2, wherein the BDC SDP answer#2 is the description information of BDC#2 determined by PSAP negotiation for establishing between the PSAP and DCMF.
S1911,E-CSCF向DCMF发送BDC SDP answer#2。对应地,DCMF接收来自E-CSCF的BDC SDP answer#2。S1911, E-CSCF sends BDC SDP answer#2 to DCMF. Correspondingly, DCMF receives BDC SDP answer#2 from E-CSCF.
示例性地,E-CSCF接收来自PSAP的200响应消息之后,从该200响应消息中获取BDC SDP answer#2,然后将该BDC SDP answer#2发送给DCMF,完成PSAP和DCMF之间的BDC#2的媒体协商。Exemplarily, after receiving the 200 response message from the PSAP, the E-CSCF obtains the BDC SDP answer#2 from the 200 response message, and then sends the BDC SDP answer#2 to the DCMF to complete the media negotiation of BDC#2 between the PSAP and the DCMF.
S1912,E-CSCF向P-CSCF发送200响应消息。对应地,P-CSCF接收来自E-CSCF的该200响应消息。S1912, the E-CSCF sends a 200 response message to the P-CSCF. Correspondingly, the P-CSCF receives the 200 response message from the E-CSCF.
示例性地,E-CSCF接收来自DCMF的资源响应消息之后,从该资源响应消息中获取BDC SDP answer#1,然后向S-CSCF发送200响应消息,并在该200响应消息中携带该BDC SDP answer#1。Exemplarily, after receiving the resource response message from DCMF, E-CSCF obtains BDC SDP answer#1 from the resource response message, and then sends a 200 response message to S-CSCF, and carries the BDC SDP answer#1 in the 200 response message.
可以理解的是,本申请不限定E-CSCF执行S1909和S1912的先后顺序。It is understandable that the present application does not limit the order in which the E-CSCF executes S1909 and S1912.
S1913,P-CSCF向UE发送200响应消息。对应地,UE接收来自P-CSCF的该200响应消息。S1913, the P-CSCF sends a 200 response message to the UE. Correspondingly, the UE receives the 200 response message from the P-CSCF.
示例性地,P-CSCF接收来自E-CSCF的200响应消息之后,将该200响应消息转发给UE。UE从该200响应消息中获取BDC SDP answer#1,从而完成UE和DCMF之间的BDC#1的媒体协商。Exemplarily, after receiving the 200 response message from the E-CSCF, the P-CSCF forwards the 200 response message to the UE. The UE obtains the BDC SDP answer#1 from the 200 response message, thereby completing the media negotiation of BDC#1 between the UE and the DCMF.
S1914,DCMF和UE之间建立BDC#1。S1914, BDC#1 is established between DCMF and UE.
S1915,DCMF和PSAP之间建立BDC#2。S1915, BDC#2 is established between DCMF and PSAP.
经过上述描述信息协商流程,DCMF分别完成和主叫UE、PSAP之间的BDC的建立。After the above description information negotiation process, DCMF completes the establishment of BDC with the calling UE and PSAP respectively.
进一步地,UE请求建立ADC。下面结合S1916-S1929对ADC的创建流程进行示例性说明。Further, the UE requests to establish an ADC. The following is an exemplary description of the ADC creation process in conjunction with S1916-S1929.
S1916,UE向P-CSCF发送re-invite请求消息。对应地,P-CSCF接收来自UE的该re-invite请求消息。S1916, the UE sends a re-invite request message to the P-CSCF. Correspondingly, the P-CSCF receives the re-invite request message from the UE.
示例性地,UE在确定与PSAP之间的紧急通话接通之后,向P-CSCF发送re-invite请求消息,以请求协商建立ADC。该re-invite请求消息包括ADC SDP offer#1。其中,该ADC SDP offer#1为UE用于建立ADC的描述信息,如UE用于对接ADC的IP地址、端口信息、TLS ID和证书、QoS需求等。Exemplarily, after confirming that the emergency call with the PSAP is connected, the UE sends a re-invite request message to the P-CSCF to request negotiation to establish an ADC. The re-invite request message includes ADC SDP offer#1. The ADC SDP offer#1 is the description information used by the UE to establish the ADC, such as the IP address, port information, TLS ID and certificate, QoS requirements, etc. used by the UE to connect to the ADC.
关于BDC SDP offer#1和ADC SDP offer#1的示例可参考方法1300中S1326部分的示例,这里不再赘述。For examples of BDC SDP offer#1 and ADC SDP offer#1, please refer to the examples in S1326 of method 1300, which will not be repeated here.
S1917,P-CSCF向E-CSCF发送re-invite请求消息。对应地,E-CSCF接收来自P-CSCF的re-invite请求消息。S1917, the P-CSCF sends a re-invite request message to the E-CSCF. Correspondingly, the E-CSCF receives the re-invite request message from the P-CSCF.
示例性地,P-CSCF接收来自UE的re-invite请求消息之后,将re-INVITE请求消息转发给E-CSCF。Exemplarily, after receiving the re-INVITE request message from the UE, the P-CSCF forwards the re-INVITE request message to the E-CSCF.
可选地,S1918,E-CSCF确定触发ADC创建流程。Optionally, at S1918, the E-CSCF determines to trigger an ADC creation process.
示例性地,E-CSCF接收来自P-CSCF的re-invite请求消息之后,在发现该re-invite请求消息携带有ADC描述信息(即上述ADC SDP offer#1),并确定UE支持DC的情况下,确定触发ADC创建流程,即则触发DC呼叫事件上报(具体可见S1919)。Exemplarily, after receiving the re-invite request message from the P-CSCF, if the E-CSCF finds that the re-invite request message carries ADC description information (i.e., the above-mentioned ADC SDP offer#1) and determines that the UE supports DC, it determines to trigger the ADC creation process, that is, trigger the DC call event report (see S1919 for details).
S1919,E-CSCF向DCSF发送DC活动通知(DC event notify)消息。对应地,DCSF接收来自E-CSCF的该DC活动通知消息。S1919, E-CSCF sends a DC event notify message to DCSF. Correspondingly, DCSF receives the DC event notify message from E-CSCF.
示例性地,E-CSCF向DCSF发送DC活动通知消息,以上报紧急呼叫的DC呼叫事件给DCSF。Exemplarily, the E-CSCF sends a DC activity notification message to the DCSF to report a DC call event of the emergency call to the DCSF.
S1920,DCSF向E-CSCF发送DC控制请求(DC control request)消息。对应地,E-CSCF接收来自DCMF的该DC控制请求消息。S1920: DCSF sends a DC control request message to E-CSCF. Correspondingly, E-CSCF receives the DC control request message from DCMF.
示例性地,DCMF收到E-CSCF上报的DC呼叫事件之后,确定当前呼叫为紧急呼叫,且ADC需要锚定到DCMF,则DCMF向E-CSCF下发DC控制请求消息,以申请ADC通道资源。Exemplarily, after receiving the DC call event reported by the E-CSCF, the DCMF determines that the current call is an emergency call and the ADC needs to be anchored to the DCMF, then the DCMF sends a DC control request message to the E-CSCF to apply for ADC channel resources.
S1921,E-CSCF向DCMF发送资源请求消息。对应地,DCMF接收来自E-CSCF的该资源请求消息。S1921, the E-CSCF sends a resource request message to the DCMF. Correspondingly, the DCMF receives the resource request message from the E-CSCF.
示例性地,E-CSCF接收来自DCMF的DC控制请求消息之后,向DCMF申请ADC通道资源。例如,E-CSCF向DCMF发送资源请求消息,该资源请求消息包括ADC SDP offer#1,该资源请求消息用于请求获取DCMF用于创建ADC的描述信息。Exemplarily, after receiving the DC control request message from the DCMF, the E-CSCF applies for ADC channel resources from the DCMF. For example, the E-CSCF sends a resource request message to the DCMF, the resource request message including ADC SDP offer#1, and the resource request message is used to request the DCMF to obtain the description information used to create the ADC.
S1922,DCMF向E-CSCF发送资源响应消息。对应地,E-CSCF接收来自DCMF的该资源响应消息。S1922, DCMF sends a resource response message to E-CSCF. Correspondingly, E-CSCF receives the resource response message from DCMF.
示例性地,接收来自E-CSCF的资源请求消息之后,DCMF基于ADC SDP offer#1进行媒体协商,确定用于创建UE和DCMF之间的ADC(记为ADC#1)的描述信息,并分配用于创建PSAP和DCMF之
间的ADC(记为ADC#2)的描述信息。Exemplarily, after receiving the resource request message from the E-CSCF, the DCMF performs media negotiation based on the ADC SDP offer#1, determines the description information for establishing the ADC (denoted as ADC#1) between the UE and the DCMF, and allocates the description information for establishing the PSAP and the DCMF. Description information of the ADC (denoted as ADC#2) in the space.
进一步地,DCMF向E-CSCF发送资源响应消息,该资源响应消息包括ADC SDP answer#1和ADC SDP offer#2。其中,ADC SDP answer#1为DCMF协商确定的用于创建UE和DCMF之间的ADC#1的描述信息;ADC SDP offer#2为DCMF分配的用于创建PSAP和DCMF之间的ADC#2的描述信息。Further, DCMF sends a resource response message to E-CSCF, which includes ADC SDP answer#1 and ADC SDP offer#2. ADC SDP answer#1 is the description information of ADC#1 determined by DCMF negotiation for establishing UE and DCMF; ADC SDP offer#2 is the description information of ADC#2 allocated by DCMF for establishing PSAP and DCMF.
S1923,E-CSCF向PSAP发送re-invite请求消息。对应地,PSAP接收来自E-CSCF的re-invite请求消息。S1923, the E-CSCF sends a re-invite request message to the PSAP. Correspondingly, the PSAP receives the re-invite request message from the E-CSCF.
示例性地,E-CSCF接收来自DCMF的资源响应消息之后,向PSAP发送re-invite请求消息,并在该re-invite请求消息中携带ADC SDP offer#2,以协商DCMF和PSAP之间的ADC#2的描述信息。Exemplarily, after receiving the resource response message from DCMF, E-CSCF sends a re-invite request message to PSAP, and carries ADC SDP offer#2 in the re-invite request message to negotiate the description information of ADC#2 between DCMF and PSAP.
S1924,PSAP向E-CSCF发送200响应消息。对应地,E-CSCF接收来自PSAP的该200响应消息。S1924, the PSAP sends a 200 response message to the E-CSCF. Correspondingly, the E-CSCF receives the 200 response message from the PSAP.
示例性地,PSAP接收到re-invite请求消息之后,根据该re-invite请求消息中携带的描述信息完成媒体协商,然后向E-CSCF发送200响应消息,该200响应消息中携带ADC SDP answer#2,其中,该ADC SDP answer#2为PSAP协商确定的用于建立PSAP和DCMF之间的ADC#2的描述信息。Exemplarily, after receiving the re-invite request message, the PSAP completes the media negotiation according to the description information carried in the re-invite request message, and then sends a 200 response message to the E-CSCF. The 200 response message carries ADC SDP answer#2, wherein the ADC SDP answer#2 is the description information of ADC#2 determined by the PSAP negotiation for establishing the connection between the PSAP and the DCMF.
S1925,E-CSCF向DCMF发送ADC SDP answer#2。对应地,DCMF接收来自E-CSCF的ADC SDP answer#2。At S1925, E-CSCF sends ADC SDP answer#2 to DCMF. Correspondingly, DCMF receives ADC SDP answer#2 from E-CSCF.
示例性地,E-CSCF接收来自PSAP的200响应消息之后,从该200响应消息中获取ADC SDP answer#2,然后将该ADC SDP answer#2发送给DCMF,完成PSAP和DCMF之间的ADC#2的媒体协商。Exemplarily, after receiving the 200 response message from the PSAP, the E-CSCF obtains ADC SDP answer#2 from the 200 response message, and then sends the ADC SDP answer#2 to the DCMF to complete the media negotiation of ADC#2 between the PSAP and the DCMF.
S1926,E-CSCF向P-CSCF发送200响应消息。对应地,P-CSCF接收来自E-CSCF的该200响应消息。S1926, the E-CSCF sends a 200 response message to the P-CSCF. Correspondingly, the P-CSCF receives the 200 response message from the E-CSCF.
示例性地,E-CSCF接收来自DCMF的资源响应消息之后,从该资源响应消息中获取ADC SDP answer#1,然后向S-CSCF发送200响应消息,并在该200响应消息中携带该ADC SDP answer#1。Exemplarily, after receiving the resource response message from DCMF, E-CSCF obtains ADC SDP answer#1 from the resource response message, and then sends a 200 response message to S-CSCF, and carries the ADC SDP answer#1 in the 200 response message.
可以理解的是,本申请不限定E-CSCF执行S1926和S1923的先后顺序。It is understandable that the present application does not limit the order in which the E-CSCF executes S1926 and S1923.
S1927,P-CSCF向UE发送200响应消息。对应地,UE接收来自P-CSCF的该200响应消息。S1927, the P-CSCF sends a 200 response message to the UE. Correspondingly, the UE receives the 200 response message from the P-CSCF.
示例性地,P-CSCF接收来自E-CSCF的200响应消息之后,将该200响应消息转发给UE。UE从该200响应消息中获取ADC SDP answer#1,从而完成UE和DCMF之间的ADC#1的媒体协商。Exemplarily, after receiving the 200 response message from the E-CSCF, the P-CSCF forwards the 200 response message to the UE. The UE obtains ADC SDP answer#1 from the 200 response message, thereby completing the media negotiation of ADC#1 between the UE and the DCMF.
S1928,DCMF和UE之间建立ADC#1。S1928: ADC#1 is established between the DCMF and the UE.
S1929,DCMF和PSAP之间建立ADC#2。S1929, ADC#2 is established between DCMF and PSAP.
经过上述描述信息协商流程,DCMF分别完成和主叫UE、PSAP之间的ADC的建立。After the above description information negotiation process, DCMF completes the establishment of ADC with the calling UE and PSAP respectively.
进一步地,UE和PSAP可以通过建立好的BDC获取DC App,然后UE上的DC App和PSAP上的DC App可以通过建立好的ADC传输信息,具体如S1930-S1935所示。其中S1930-S1935与方法1700中的S1716-S1721类似,为了简洁,这里不再赘述。Furthermore, the UE and the PSAP can obtain the DC App through the established BDC, and then the DC App on the UE and the DC App on the PSAP can transmit information through the established ADC, as shown in S1930-S1935. S1930-S1935 are similar to S1716-S1721 in method 1700, and will not be repeated here for the sake of brevity.
可以理解的是,在方法1900中UE和PSAP获取DC App的流程(即S1930-S1931)可以在BDC创建流程之后(即S1914和S1915之后)的任意时刻执行,本申请不作限定。It can be understood that the process of UE and PSAP obtaining DC App in method 1900 (i.e., S1930-S1931) can be executed at any time after the BDC creation process (i.e., after S1914 and S1915), and this application is not limited to this.
图20示出了适用于图16所示的网络架构的另一种方法1400的示例性流程图。在方法2000中,UE在与PSAP之间的紧急通话建立完成之后,再分别发起BDC的建立流程以及ADC的建立流程,以减少紧急通话的接通时延。并且在该实施例中,ADC锚定到DCMF。下面结合图20中的各个步骤对方法2000作示例性说明。FIG. 20 shows an exemplary flow chart of another method 1400 applicable to the network architecture shown in FIG. 16 . In method 2000, after the emergency call between the UE and the PSAP is established, the UE initiates the establishment process of the BDC and the establishment process of the ADC respectively to reduce the connection delay of the emergency call. And in this embodiment, the ADC is anchored to the DCMF. The method 2000 is exemplarily described below in conjunction with the various steps in FIG. 20 .
S2001a,UE通过初始INVITE流程发起紧急呼叫,与PSAP之间建立IMS会话。S2001a, the UE initiates an emergency call through the initial INVITE process and establishes an IMS session with the PSAP.
S2001b,PSAP向UE发送摘机200OK响应消息。对应地,UE接收来自PSAP的该摘机200OK响应消息。S2001b, PSAP sends an off-hook 200OK response message to UE. Correspondingly, UE receives the off-hook 200OK response message from PSAP.
本申请不限定UE与PSAP之间建立紧急通话的具体实现方式。作为一种示例,可以通过如7所示的方法700建立UE和PSAP之间的紧急通话。The present application does not limit the specific implementation of establishing an emergency call between the UE and the PSAP. As an example, an emergency call between the UE and the PSAP can be established by the method 700 shown in FIG.
进一步地,UE请求建立BDC,具体过程如S2002-S015所示。S2002-S2015与方法1900中的S11902-S1915类似,为了简洁,这里不再赘述。Further, the UE requests to establish a BDC, and the specific process is shown in S2002-S015. S2002-S2015 are similar to S11902-S1915 in method 1900, and are not described here for brevity.
再进一步地,UE请求建立ADC。下面结合S2016-S2025对ADC的创建流程进行示例性说明。Furthermore, the UE requests to establish an ADC. The following is an exemplary description of the ADC creation process in conjunction with S2016-S2025.
S2016,UE向P-CSCF发送re-invite请求消息。对应地,P-CSCF接收来自UE的该re-invite请求消息。S2016, the UE sends a re-invite request message to the P-CSCF. Correspondingly, the P-CSCF receives the re-invite request message from the UE.
示例性地,UE在确定与PSAP之间的紧急通话接通之后,向P-CSCF发送re-invite请求消息,以请求协商建立ADC。该re-invite请求消息包括ADC SDP offer#1。其中,该ADC SDP offer#1为UE用于建立ADC的描述信息,如UE用于对接ADC的IP地址、端口信息、TLS ID和证书、QoS需求等。
Exemplarily, after determining that the emergency call between the UE and the PSAP is connected, the UE sends a re-invite request message to the P-CSCF to request negotiation to establish an ADC. The re-invite request message includes ADC SDP offer#1. The ADC SDP offer#1 is the description information used by the UE to establish the ADC, such as the IP address, port information, TLS ID and certificate, QoS requirements, etc. used by the UE to connect to the ADC.
关于BDC SDP offer#1和ADC SDP offer#1的示例可参考方法1400中S1426部分的示例,这里不再赘述。For examples of BDC SDP offer#1 and ADC SDP offer#1, please refer to the examples in S1426 of method 1400, which will not be repeated here.
S2017,P-CSCF向E-CSCF发送re-invite请求消息。对应地,E-CSCF接收来自P-CSCF的re-invite请求消息。S2017, the P-CSCF sends a re-invite request message to the E-CSCF. Correspondingly, the E-CSCF receives the re-invite request message from the P-CSCF.
示例性地,P-CSCF接收来自UE的re-invite请求消息之后,将re-INVITE请求消息转发给E-CSCF。Exemplarily, after receiving the re-INVITE request message from the UE, the P-CSCF forwards the re-INVITE request message to the E-CSCF.
可选地,S2018,MMTel AS确定触发ADC创建流程。Optionally, S2018, MMTel AS determines to trigger the ADC creation process.
示例性地,MMTel AS接收来自P-CSCF的re-invite请求消息之后,在发现该re-invite请求消息携带有ADC描述信息(即上述ADC SDP offer#1),并确定UE支持DC的情况下,确定触发ADC创建流程,即则触发DC呼叫事件上报(具体可见S2019)。Exemplarily, after receiving the re-invite request message from the P-CSCF, the MMTel AS finds that the re-invite request message carries ADC description information (i.e., the above-mentioned ADC SDP offer#1) and determines that the UE supports DC, it determines to trigger the ADC creation process, that is, trigger the DC call event report (see S2019 for details).
S2019,E-CSCF向DCMF发送DC活动通知(DC event notify)消息。对应地,DCMF接收来自E-CSCF的该DC活动通知消息。S2019, E-CSCF sends a DC event notify message to DCMF. Correspondingly, DCMF receives the DC event notify message from E-CSCF.
示例性地,E-CSCF向DCSF发送DC活动通知消息,以上报紧急呼叫的DC呼叫事件给DCSF。Exemplarily, the E-CSCF sends a DC activity notification message to the DCSF to report a DC call event of the emergency call to the DCSF.
S2020,DCSF向发送DC控制请求(DC control request)消息。对应地,DC接收来自DCMF的该DC控制请求消息。S2020, DCSF sends a DC control request message to DC. Correspondingly, DC receives the DC control request message from DCMF.
示例性地,DCSF收到E-CSCF上报的DC呼叫事件之后,确定当前呼叫为紧急呼叫,且ADC不需要锚定到DCMF,则DCSF向E-CSCF下发DC控制请求消息,以指示继续呼叫。Exemplarily, after receiving the DC call event reported by the E-CSCF, the DCSF determines that the current call is an emergency call and the ADC does not need to be anchored to the DCMF, then the DCSF sends a DC control request message to the E-CSCF to instruct to continue the call.
S2021,E-CSCF向PSAP发送re-invite请求消息。对应地,PSAP接收来自E-CSCF的re-invite请求消息。S2021, the E-CSCF sends a re-invite request message to the PSAP. Correspondingly, the PSAP receives the re-invite request message from the E-CSCF.
示例性地,E-CSCF向S-CSCF转发re-invite请求消息,以协商UE和PSAP之间的ADC#1的描述信息。Exemplarily, the E-CSCF forwards the re-invite request message to the S-CSCF to negotiate the description information of ADC#1 between the UE and the PSAP.
S2022,PSAP向E-CSCF发送200响应消息。对应地,E-CSCF通过S-CSCF接收来自PSAP的该200响应消息。S2022, PSAP sends a 200 response message to E-CSCF. Correspondingly, E-CSCF receives the 200 response message from PSAP through S-CSCF.
示例性地,PSAP接收到re-invite请求消息之后,根据该re-invite请求消息中携带的描述信息完成媒体协商,然后通过S-CSCF向E-CSCF发送200响应消息,该200响应消息中携带ADC SDP answer#1,其中,该ADC SDP answer#1为PSAP协商确定的用于建立PSAP和UE之间的ADC#1的描述信息。Exemplarily, after receiving the re-invite request message, the PSAP completes the media negotiation according to the description information carried in the re-invite request message, and then sends a 200 response message to the E-CSCF through the S-CSCF. The 200 response message carries ADC SDP answer#1, wherein the ADC SDP answer#1 is the description information of ADC#1 determined by the PSAP negotiation for establishing the connection between the PSAP and the UE.
S2023,E-CSCF向P-CSCF发送200响应消息。对应地,P-CSCF接收来自E-CSCF的该200响应消息。S2023, the E-CSCF sends a 200 response message to the P-CSCF. Correspondingly, the P-CSCF receives the 200 response message from the E-CSCF.
示例性地,E-CSCF接收来自PSAP的200响应消息之后,将该200响应消息转发给P-CSCF,该200响应响应消息中携带ADC SDP answer#1。Exemplarily, after receiving the 200 response message from the PSAP, the E-CSCF forwards the 200 response message to the P-CSCF, and the 200 response message carries ADC SDP answer#1.
S2024,S-CSCF向UE发送200响应消息。对应地,UE接收来自S-CSCF的该200响应消息。S2024, the S-CSCF sends a 200 response message to the UE. Correspondingly, the UE receives the 200 response message from the S-CSCF.
示例性地,P-CSCF接收来自E-CSCF的200响应消息之后,将该200响应消息转发给UE。UE从该200响应消息中获取ADC SDP answer#1,从而完成UE和PSAP之间的ADC#1的媒体协商。Exemplarily, after receiving the 200 response message from the E-CSCF, the P-CSCF forwards the 200 response message to the UE. The UE obtains ADC SDP answer#1 from the 200 response message, thereby completing the media negotiation of ADC#1 between the UE and the PSAP.
S2025,PSAP和UE之间建立ADC#1。S2025, ADC#1 is established between PSAP and UE.
经过上述描述信息协商流程,完成了主叫UE和PSAP之间的ADC的建立。After the above description information negotiation process, the establishment of ADC between the calling UE and the PSAP is completed.
进一步地,UE和PSAP可以通过建立好的BDC获取DC App,然后UE上的DC App和PSAP上的DC App可以通过建立好的ADC传输信息,具体如S2026-S2029所示。其中S2026-S2029与方法1800中的S1817-S1820类似,为了简洁,这里不再赘述。Furthermore, the UE and the PSAP can obtain the DC App through the established BDC, and then the DC App on the UE and the DC App on the PSAP can transmit information through the established ADC, as shown in S2026-S2029. S2026-S2029 are similar to S1817-S1820 in method 1800, and will not be repeated here for the sake of brevity.
可以理解的是,在方法2000中UE和PSAP获取DC App的流程(即S2026-S2027)可以在BDC创建流程之后(即S2014和S2015之后)的任意时刻执行,本申请不作限定。It can be understood that the process of UE and PSAP obtaining DC App in method 2000 (i.e., S2026-S2027) can be executed at any time after the BDC creation process (i.e., after S2014 and S2015), and this application does not limit it.
图21示出了图16所示的网络架构的另一种方法2100的示例性流程图。在方法2100中,UE在与PSAP之间的紧急通话建立完成之后,发起BDC的建立流程,以减少紧急通话的接通时延。并且在该实施例中,BDC既可以用于下载数据通道应用,又可以用于传输数据通道应用的附加通信信息。即该实施例中可以不建立ADC。下面结合图21中的各个步骤对方法2100作示例性说明。FIG. 21 shows an exemplary flow chart of another method 2100 of the network architecture shown in FIG. 16. In method 2100, after the emergency call between UE and PSAP is established, UE initiates the establishment process of BDC to reduce the connection delay of the emergency call. And in this embodiment, BDC can be used to download data channel applications and can also be used to transmit additional communication information of data channel applications. That is, ADC can not be established in this embodiment. The following is an exemplary description of method 2100 in conjunction with the various steps in FIG. 21.
S2101,UE通过初始INVITE流程发起紧急呼叫,与PSAP之间建立IMS会话。S2101, the UE initiates an emergency call through an initial INVITE process and establishes an IMS session with the PSAP.
本申请不限定UE与PSAP之间建立紧急通话的具体实现方式。作为一种示例,可以通过如7所示的方法700建立UE和PSAP之间的紧急通话。The present application does not limit the specific implementation of establishing an emergency call between the UE and the PSAP. As an example, an emergency call between the UE and the PSAP can be established by the method 700 shown in FIG.
进一步地,UE请求建立BDC,具体过程如S2102-S2115所示。S2102-S2115与方法1900中的S1902-S1915类似,为了简洁,这里不再赘述。
Further, the UE requests to establish a BDC, and the specific process is shown in S2102-S2115. S2102-S2115 are similar to S1902-S1915 in method 1900, and are not described here for brevity.
经过上述描述信息协商流程,DCMF分别完成和主叫UE、PSAP之间的BDC的建立。After the above description information negotiation process, DCMF completes the establishment of BDC with the calling UE and PSAP respectively.
进一步地,UE和PSAP可以通过建立好的BDC获取DC App,然后UE上的DC App和PSAP上的DC App可以通过建立好的BDC传输数据。下面结合S2116-S2121进行示例性说明。Furthermore, the UE and the PSAP can obtain the DC App through the established BDC, and then the DC App on the UE and the DC App on the PSAP can transmit data through the established BDC. The following is an exemplary description in conjunction with S2116-S2121.
S2116,UE通过BDC#1从DCMF获取DC App,具体过程本申请不作限定。这里的DC App例如可以是紧急呼叫小程序。S2116, UE obtains DC App from DCMF through BDC#1. The specific process is not limited in this application. The DC App here can be, for example, an emergency call applet.
S2127,PSAP通过BDC#2从DCMF获取DC App。可以理解的是,PSAP获取的DC App与UE获取的DC App应相同。S2127, PSAP obtains DC App from DCMF through BDC#2. It is understandable that the DC App obtained by PSAP should be the same as the DC App obtained by UE.
S2118,UE上的DC App通过BDC#1向DCMF发送数据#1,如图片、视频、位置等数据。S2118, DC App on UE sends data #1, such as pictures, videos, location and other data, to DCMF through BDC #1.
S2119,DCMF通过BDC#2向PSAP上的DC App发送数据#1。S2119, DCMF sends data #1 to DC App on PSAP through BDC #2.
S2120,PSAP上的DC App通过BDC#2向DCMF发送数据#2。S2120, DC App on PSAP sends data #2 to DCMF through BDC #2.
S2121,DCMF通过BDC#1向UE上的DC App发送数据#2。S2121, DCMF sends data #2 to DC App on UE through BDC #1.
通过上述过程,UE和PSAP可以在下载的DC App内通过建立好的ADC通道传输图片、视频、位置等数据。Through the above process, UE and PSAP can transmit pictures, videos, location and other data through the established ADC channel in the downloaded DC App.
可以理解的是,上述实施例(方法1100-方法1500、方法1700-方法2100)是以UE和PSAP为进行IMS通话的设备为例进行说明的,但本申请实施例并不限于此,也就是说,本申请实施例还可以适用于三个或三个以上设备进行IMS通话的场景。It can be understood that the above embodiments (method 1100-method 1500, method 1700-method 2100) are described using UE and PSAP as an example of devices for conducting IMS calls, but the embodiments of the present application are not limited to this, that is, the embodiments of the present application can also be applied to scenarios where three or more devices conduct IMS calls.
相应于上述各方法实施例给出的方法,本申请实施例还提供了相应的装置,该装置包括用于执行上述各个方法实施例相应的模块。该模块可以是软件,也可以是硬件,或者是软件和硬件结合。可以理解的是,上述各方法实施例所描述的技术特征同样适用于以下装置实施例,因此,未详细描述的内容可以参见上文方法实施例,为了简洁,这里不再赘述。Corresponding to the methods given in the above-mentioned method embodiments, the embodiments of the present application also provide corresponding devices, which include modules for executing the corresponding methods in the above-mentioned method embodiments. The module can be software, hardware, or a combination of software and hardware. It can be understood that the technical features described in the above-mentioned method embodiments are also applicable to the following device embodiments. Therefore, the contents not described in detail can be referred to the above method embodiments, and for the sake of brevity, they will not be repeated here.
图22是本申请实施例提供的通信装置10的示意性框图。该装置10包括收发模块11和/或处理模块12。收发模块11可以实现相应的通信功能,处理模块12用于进行数据处理,或者说该收发模块11用于执行接收和发送相关的操作,该处理模块12用于执行除了接收和发送以外的其他操作。收发模块11还可以称为通信接口或通信单元。FIG22 is a schematic block diagram of a communication device 10 provided in an embodiment of the present application. The device 10 includes a transceiver module 11 and/or a processing module 12. The transceiver module 11 can implement corresponding communication functions, and the processing module 12 is used to perform data processing, or in other words, the transceiver module 11 is used to perform operations related to receiving and sending, and the processing module 12 is used to perform other operations besides receiving and sending. The transceiver module 11 can also be called a communication interface or a communication unit.
可选地,该装置10还可以包括存储模块13,该存储模块13可以用于存储指令和/或数据,处理模块12可以读取存储模块中的指令和/或数据,以使得装置实现前述各个方法实施例中设备或网元的动作。Optionally, the device 10 may also include a storage module 13, which can be used to store instructions and/or data. The processing module 12 can read the instructions and/or data in the storage module so that the device implements the actions of the device or network element in the aforementioned method embodiments.
在第一种设计中,该装置10可对应于上文方法实施例中的第一通信设备(例如图8或图9中的第一通信设备,或是图11-图15或图17-图21中的UE),或者是第一通信设备的组成部件(如芯片)。In a first design, the apparatus 10 may correspond to the first communication device in the above method embodiment (e.g., the first communication device in FIG. 8 or 9 , or the UE in FIG. 11 - 15 or FIG. 17 - 21 ), or a component of the first communication device (e.g., a chip).
该装置10可实现对应于上文方法实施例中的第一通信设备执行的步骤或者流程,其中,收发模块11可用于执行上文方法实施例中第一通信设备的收发相关的操作,处理模块12可用于执行上文方法实施例中第一通信设备的处理相关的操作。The device 10 can implement the steps or processes executed by the first communication device in the above method embodiment, wherein the transceiver module 11 can be used to execute the transceiver related operations of the first communication device in the above method embodiment, and the processing module 12 can be used to execute the processing related operations of the first communication device in the above method embodiment.
在一种可能的实现方式,该装置10可实现上文方法实施例中方法800或方法900中的第一通信设备,或方法1100-方法1500或方法1700-方法2100中的UE执行的步骤或者流程,示例性地,收发模块11,用于接收来自第二通信设备的呼叫响应消息,该呼叫响应消息指示该第一通信设备与该第二通信设备之间的互联网协议多媒体子系统IMS会话建立完成;该收发模块11,还用于向会话控制功能设备发送重邀请re-invite请求消息,该re-invite请求消息包含用于建立第一数据通道的第一描述信息,该第一数据通道用于下载数据通道应用,该数据通道应用用于在该第一通信设备与该第二通信设备之间进行除语音通话或视频通话之外的通信。In one possible implementation, the device 10 may implement the steps or processes executed by the first communication device in method 800 or method 900 in the above method embodiments, or the UE in methods 1100-method 1500 or methods 1700-method 2100. Exemplarily, the transceiver module 11 is used to receive a call response message from the second communication device, and the call response message indicates that the Internet Protocol Multimedia Subsystem IMS session between the first communication device and the second communication device is established; the transceiver module 11 is also used to send a re-invite request message to the session control function device, and the re-invite request message includes first description information for establishing a first data channel, and the first data channel is used to download a data channel application, and the data channel application is used to conduct communications other than voice calls or video calls between the first communication device and the second communication device.
在第二种设计中,该装置10可对应于上文方法实施例中的第二通信设备(例如图8或图9中的第二通信设备,或是图11-图15或图17-图21中的PSAP),或者是第二通信设备的组成部件(如芯片)。In a second design, the apparatus 10 may correspond to the second communication device in the above method embodiment (e.g., the second communication device in FIG. 8 or 9 , or the PSAP in FIG. 11 - 15 or FIG. 17 - 21 ), or a component of the second communication device (e.g., a chip).
该装置10可实现对应于上文方法实施例中的第二通信设备执行的步骤或者流程,其中,收发模块11可用于执行上文方法实施例中第二通信设备的收发相关的操作,处理模块12可用于执行上文方法实施例中第二通信设备的处理相关的操作。The device 10 can implement the steps or processes executed by the second communication device in the above method embodiment, wherein the transceiver module 11 can be used to execute the transceiver related operations of the second communication device in the above method embodiment, and the processing module 12 can be used to execute the processing related operations of the second communication device in the above method embodiment.
在第三种设计中,该装置10可对应于上文方法实施例中的会话控制功能设备(例如图8或图9中的会话控制功能设备,或是图11-图15中的MMTel AS,或图17-图21中的E-CSCF),或者是会话控制功能设备的组成部件(如芯片)。In a third design, the device 10 may correspond to the session control function device in the above method embodiment (for example, the session control function device in Figure 8 or Figure 9, or the MMTel AS in Figures 11 to 15, or the E-CSCF in Figures 17 to 21), or a component of the session control function device (such as a chip).
该装置10可实现对应于上文方法实施例中的会话控制功能设备执行的步骤或者流程,其中,收发模块11可用于执行上文方法实施例中会话控制功能设备的收发相关的操作,处理模块12可用于执行上文
方法实施例中会话控制功能设备的处理相关的操作。The device 10 can implement the steps or processes executed by the session control function device in the above method embodiment, wherein the transceiver module 11 can be used to perform the transceiver-related operations of the session control function device in the above method embodiment, and the processing module 12 can be used to perform the above The processing-related operations of the session control function device in the method embodiment.
在一种可能的实现方式,该装置10可实现上文方法实施例中方法800或900中的会话控制功能网元,或方法1100-1500或方法1700-2100中的会话控制功能设备执行的步骤或者流程,示例性地,收发模块11,用于接收来自第一通信设备的重邀请re-invite请求消息,该re-invite请求消息包含用于建立该第一数据通道的第一描述信息,该第一数据通道用于下载数据通道应用,该数据通道应用用于在该第一通信设备与该第二通信设备之间进行除语音通话或视频通话之外的通信,该第一通信设备与该第二通信设备之间的IMS会话已建立完成;处理模块12,用于根据该re-invite请求消息触发该第一数据通道的建立。In a possible implementation, the device 10 can implement the session control function network element in method 800 or 900 in the above method embodiment, or the steps or processes executed by the session control function device in methods 1100-1500 or methods 1700-2100. Exemplarily, the transceiver module 11 is used to receive a re-invite request message from a first communication device, the re-invite request message includes first description information for establishing the first data channel, the first data channel is used to download a data channel application, the data channel application is used to communicate between the first communication device and the second communication device other than voice calls or video calls, and the IMS session between the first communication device and the second communication device has been established; the processing module 12 is used to trigger the establishment of the first data channel according to the re-invite request message.
应理解,各模块执行上述相应步骤的具体过程在上述各方法实施例中已经详细说明,为了简洁,在此不再赘述。It should be understood that the specific process of each module executing the above corresponding steps has been described in detail in the above method embodiments, and for the sake of brevity, it will not be repeated here.
还应理解,这里的装置10以功能模块的形式体现。这里的术语“模块”可以指应用特有集成电路(application specific integrated circuit,ASIC)、电子电路、用于执行一个或多个软件或固件程序的处理器(例如共享处理器、专有处理器或组处理器等)和存储器、合并逻辑电路和/或其它支持所描述的功能的合适组件。在一个可选例子中,本领域技术人员可以理解,装置10可以具体为上述实施例中的终端设备,可以用于执行上述各方法实施例中与终端设备对应的各个流程和/或步骤;或者,装置10可以具体为上述实施例中的网络设备,可以用于执行上述各方法实施例中与网络设备对应的各个流程和/或步骤,为避免重复,在此不再赘述。It should also be understood that the device 10 here is embodied in the form of a functional module. The term "module" here may refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (such as a shared processor, a dedicated processor or a group processor, etc.) and a memory for executing one or more software or firmware programs, a merged logic circuit and/or other suitable components that support the described functions. In an optional example, those skilled in the art can understand that the device 10 can be specifically a terminal device in the above-mentioned embodiment, and can be used to execute the various processes and/or steps corresponding to the terminal device in the above-mentioned method embodiments; or, the device 10 can be specifically a network device in the above-mentioned embodiment, and can be used to execute the various processes and/or steps corresponding to the network device in the above-mentioned method embodiments. To avoid repetition, it will not be repeated here.
上述各个方案的装置10具有实现上述方法中的设备(如第一通信设备,或第二通信设备,或会话控制功能设备)所执行的相应步骤的功能。该功能可以通过硬件实现,也可以通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的模块;例如收发模块可以由收发机替代(例如,收发模块中的发送单元可以由发送机替代,收发模块中的接收单元可以由接收机替代),其它单元,如处理模块等可以由处理器替代,分别执行各个方法实施例中的收发操作以及相关的处理操作。The device 10 of each of the above schemes has the function of implementing the corresponding steps performed by the device (such as the first communication device, or the second communication device, or the session control function device) in the above method. This function can be implemented by hardware, or by hardware executing the corresponding software implementation. The hardware or software includes one or more modules corresponding to the above functions; for example, the transceiver module can be replaced by a transceiver (for example, the sending unit in the transceiver module can be replaced by a transmitter, and the receiving unit in the transceiver module can be replaced by a receiver), and other units, such as processing modules, can be replaced by processors to respectively perform the transceiver operations and related processing operations in each method embodiment.
此外,上述收发模块11还可以是收发电路(例如可以包括接收电路和发送电路),处理模块可以是处理电路。In addition, the transceiver module 11 may also be a transceiver circuit (for example, may include a receiving circuit and a sending circuit), and the processing module may be a processing circuit.
图23是本申请实施例提供另一种通信装置20的示意图。该装置20包括处理器21,处理器21用于执行存储器22存储的计算机程序或指令,或读取存储器22存储的数据/信令,以执行上文各方法实施例中的方法。可选地,处理器21为一个或多个。FIG23 is a schematic diagram of another communication device 20 provided in an embodiment of the present application. The device 20 includes a processor 21, and the processor 21 is used to execute a computer program or instruction stored in a memory 22, or read data/signaling stored in the memory 22 to execute the method in each method embodiment above. Optionally, there are one or more processors 21.
可选地,如图23所示,该装置20还包括存储器22,存储器22用于存储计算机程序或指令和/或数据。该存储器22可以与处理器21集成在一起,或者也可以分离设置。可选地,存储器22为一个或多个。Optionally, as shown in FIG23 , the device 20 further includes a memory 22, and the memory 22 is used to store computer programs or instructions and/or data. The memory 22 can be integrated with the processor 21, or can also be separately arranged. Optionally, the memory 22 is one or more.
可选地,如图23所示,该装置20还包括收发器23,收发器23用于信号的接收和/或发送。例如,处理器21用于控制收发器23进行信号的接收和/或发送。Optionally, as shown in Fig. 23, the device 20 further includes a transceiver 23, and the transceiver 23 is used for receiving and/or sending signals. For example, the processor 21 is used to control the transceiver 23 to receive and/or send signals.
作为一种方案,该装置20用于实现上文各个方法实施例中由第一通信设备执行的操作。As a solution, the apparatus 20 is used to implement the operations performed by the first communication device in each of the above method embodiments.
作为另一种方案,该装置20用于实现上文各个方法实施例中由第二通信设备执行的操作。As another solution, the apparatus 20 is used to implement the operations performed by the second communication device in each of the above method embodiments.
作为又一种方案,该装置20用于实现上文各个方法实施例中由会话控制功能设备执行的操作。As another solution, the apparatus 20 is used to implement the operations performed by the session control function device in each of the above method embodiments.
应理解,本申请实施例中提及的处理器可以是中央处理模块(central processing unit,CPU),还可以是其他通用处理器、数字信号处理器(digital signal processor,DSP)、专用集成电路(application specific integrated circuit,ASIC)、现成可编程门阵列(field programmable gate array,FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。It should be understood that the processor mentioned in the embodiments of the present application may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.
还应理解,本申请实施例中提及的存储器可以是易失性存储器和/或非易失性存储器。其中,非易失性存储器可以是只读存储器(read-only memory,ROM)、可编程只读存储器(programmable ROM,PROM)、可擦除可编程只读存储器(erasable PROM,EPROM)、电可擦除可编程只读存储器(electrically EPROM,EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory,RAM)。例如,RAM可以用作外部高速缓存。作为示例而非限定,RAM包括如下多种形式:静态随机存取存储器(static RAM,SRAM)、动态随机存取存储器(dynamic RAM,DRAM)、同步动态随机存取存储器(synchronous DRAM,SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM,DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM,ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM,SLDRAM)和直接内存总线随机存取存储器(direct rambus RAM,DR RAM)。
It should also be understood that the memory mentioned in the embodiments of the present application may be a volatile memory and/or a non-volatile memory. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM) or a flash memory. The volatile memory may be a random access memory (RAM). For example, RAM may be used as an external cache. As an example and not limitation, RAM includes the following forms: static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous connection dynamic random access memory (SLDRAM) and direct rambus RAM (DR RAM).
需要说明的是,当处理器为通用处理器、DSP、ASIC、FPGA或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件时,存储器(存储模块)可以集成在处理器中。It should be noted that when the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, the memory (storage module) can be integrated into the processor.
还需要说明的是,本文描述的存储器旨在包括但不限于这些和任意其它适合类型的存储器。It should also be noted that the memory described herein is intended to include, but is not limited to, these and any other suitable types of memory.
图24是本申请实施例提供一种芯片系统30的示意图。该芯片系统30(或者也可以称为处理系统)包括逻辑电路31以及输入/输出接口(input/output interface)32。FIG24 is a schematic diagram of a chip system 30 provided in an embodiment of the present application. The chip system 30 (or also referred to as a processing system) includes a logic circuit 31 and an input/output interface 32.
其中,逻辑电路31可以为芯片系统30中的处理电路。逻辑电路31可以耦合连接存储单元,调用存储单元中的指令,使得芯片系统30可以实现本申请各实施例的方法和功能。输入/输出接口32,可以为芯片系统30中的输入输出电路,将芯片系统30处理好的信息输出,或将待处理的数据或信令信息输入芯片系统30进行处理。Among them, the logic circuit 31 can be a processing circuit in the chip system 30. The logic circuit 31 can be coupled to the storage unit and call the instructions in the storage unit so that the chip system 30 can implement the methods and functions of each embodiment of the present application. The input/output interface 32 can be an input/output circuit in the chip system 30, outputting information processed by the chip system 30, or inputting data or signaling information to be processed into the chip system 30 for processing.
作为一种方案,该芯片系统30用于实现上文各个方法实施例中由网络功能虚拟化编排器执行的操作。As a solution, the chip system 30 is used to implement the operations performed by the network function virtualization orchestrator in the above method embodiments.
例如,逻辑电路31用于实现上文方法实施例中由第一通信设备执行的处理相关的操作,如,图8或图9所示实施例中的第一通信设备或是图11-图15或图17-图21中的UE执行的处理相关的操作;输入/输出接口32用于实现上文方法实施例中由第一通信设备执行的发送和/或接收相关的操作,如图8或图9所示实施例中的第一通信设备或是图11-图15或图17-图21中的UE执行的发送和/或接收相关的操作。For example, the logic circuit 31 is used to implement the processing-related operations performed by the first communication device in the above method embodiments, such as the processing-related operations performed by the first communication device in the embodiments shown in Figures 8 or 9 or the UE in Figures 11-15 or 17-21; the input/output interface 32 is used to implement the sending and/or receiving-related operations performed by the first communication device in the above method embodiments, such as the sending and/or receiving-related operations performed by the first communication device in the embodiments shown in Figures 8 or 9 or the UE in Figures 11-15 or 17-21.
作为另一种方案,该芯片系统30用于实现上文各个方法实施例中由第二通信设备执行的操作,如,图8或图9所示实施例中的第二通信设备或是图11-图15或图17-图21中的UE执行的处理相关的操作;输入/输出接口32用于实现上文方法实施例中由第二通信设备执行的发送和/或接收相关的操作,如图8或图9所示实施例中的第二通信设备或是图11-图15或图17-图21中的PSAP执行的发送和/或接收相关的操作。As another solution, the chip system 30 is used to implement the operations performed by the second communication device in the above method embodiments, such as the processing-related operations performed by the second communication device in the embodiment shown in Figure 8 or Figure 9 or the UE in Figures 11-15 or Figures 17-21; the input/output interface 32 is used to implement the sending and/or receiving-related operations performed by the second communication device in the above method embodiments, such as the sending and/or receiving-related operations performed by the second communication device in the embodiment shown in Figure 8 or Figure 9 or the PSAP in Figures 11-15 or Figures 17-21.
作为又一种方案,该芯片系统30用于实现上文各个方法实施例中由应用服务器执行的操作,如,图8或图9所示实施例中的应用服务器或是图11-图15或图17-图21中的IMS AS 1执行的处理相关的操作;输入/输出接口32用于实现上文方法实施例中由应用服务器执行的发送和/或接收相关的操作,如图8或图9所示实施例中的应用服务器或是图11-图15或图17-图21中的IMS AS 1执行的发送和/或接收相关的操作。As another solution, the chip system 30 is used to implement the operations performed by the application server in the above method embodiments, such as the processing-related operations performed by the application server in the embodiment shown in Figure 8 or Figure 9 or the IMS AS 1 in Figures 11-15 or Figures 17-21; the input/output interface 32 is used to implement the sending and/or receiving-related operations performed by the application server in the above method embodiments, such as the sending and/or receiving-related operations performed by the application server in the embodiment shown in Figure 8 or Figure 9 or the IMS AS 1 in Figures 11-15 or Figures 17-21.
作为又一种方案,该芯片系统30用于实现上文各个方法实施例中由数据通道服务器执行的操作,如,图8或图9所示实施例中的数据通道服务器或是图11-图15或图17-图21中的DCS 1执行的处理相关的操作;输入/输出接口32用于实现上文方法实施例中由数据通道服务器执行的发送和/或接收相关的操作,如图8或图9所示实施例中的数据通道服务器或是图11-图15或图17-图21中的DCS 1执行的发送和/或接收相关的操作。As another solution, the chip system 30 is used to implement the operations performed by the data channel server in the above method embodiments, such as the processing-related operations performed by the data channel server in the embodiment shown in Figure 8 or Figure 9 or the DCS 1 in Figures 11-15 or Figures 17-21; the input/output interface 32 is used to implement the sending and/or receiving-related operations performed by the data channel server in the above method embodiments, such as the sending and/or receiving-related operations performed by the data channel server in the embodiment shown in Figure 8 or Figure 9 or the DCS 1 in Figures 11-15 or Figures 17-21.
本申请实施例还提供一种计算机可读存储介质,其上存储有用于实现上述各方法实施例中由设备执行的方法的计算机指令。An embodiment of the present application also provides a computer-readable storage medium on which computer instructions for implementing the methods executed by the device in the above-mentioned method embodiments are stored.
本申请实施例还提供一种计算机程序产品,包含指令,该指令被计算机执行时以实现上述各方法实施例中由设备执行的方法。An embodiment of the present application also provides a computer program product, comprising instructions, which, when executed by a computer, implement the methods performed by the device in the above-mentioned method embodiments.
本申请实施例还提供了一种通信系统,包括前述的应用服务器和数据通道服务器。可选地,还包括前述的第一通信设备和第二通信设备。The embodiment of the present application further provides a communication system, including the aforementioned application server and data channel server. Optionally, it also includes the aforementioned first communication device and second communication device.
上述提供的任一种装置中相关内容的解释及有益效果均可参考上文提供的对应的方法实施例,此处不再赘述。The explanation of the relevant contents and beneficial effects of any of the above-mentioned devices can be referred to the corresponding method embodiments provided above, which will not be repeated here.
在本申请所提供的几个实施例中,应该理解到,所揭露的装置和方法,可以通过其它的方式实现。例如,以上所描述的装置实施例仅是示意性的,例如,所述单元的划分,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式,例如多个单元或组件可以结合或者可以集成到另一个系统,或一些特征可以忽略,或不执行。此外,所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口,装置或单元的间接耦合或通信连接,可以是电性,机械或其它的形式。In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.
在上述实施例中,可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时,可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时,全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。例如,所述计算机可以是个人计算机,服务器,或者网络设备等。所述计算机指令可以存储在计算机可读存储介质中,或者从一个计算机可读存储介质向另一个计算机可读存储介质传输,例如,所述计算机指令可以从一个
网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如,软盘、硬盘、磁带)、光介质(例如,DVD)、或者半导体介质(例如固态硬盘(solid state disk,SSD)等。例如,前述的可用介质包括但不限于:U盘、移动硬盘、只读存储器(read-only memory,ROM)、随机存取存储器(random access memory,RAM)、磁碟或者光盘等各种可以存储程序代码的介质。In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiments of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. For example, the computer can be a personal computer, a server, or a network device. The computer instructions can be stored in a computer-readable storage medium, or transferred from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one computer-readable storage medium to another computer-readable storage medium. A website, computer, server or data center transmits to another website, computer, server or data center via wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or data center that includes one or more available media integrated therein. The available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid state disk (SSD), etc. For example, the aforementioned available medium includes, but is not limited to, various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.
以上所述,仅为本申请的具体实施方式,但本申请的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本申请揭露的技术范围内,可轻易想到变化或替换,都应涵盖在本申请的保护范围之内。因此,本申请的保护范围应以所述权利要求的保护范围为准。
The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.
Claims (26)
- 一种通信方法,其特征在于,包括:A communication method, comprising:第一通信设备接收来自第二通信设备的呼叫响应消息,所述呼叫响应消息指示所述第一通信设备与所述第二通信设备之间的互联网协议多媒体子系统IMS会话建立完成;The first communication device receives a call response message from the second communication device, wherein the call response message indicates that the Internet Protocol Multimedia Subsystem IMS session between the first communication device and the second communication device is established;响应于所述呼叫响应消息,所述第一通信设备向会话控制功能设备发送重邀请re-invite请求消息,所述re-invite请求消息包含用于建立第一数据通道的第一描述信息,所述第一数据通道用于下载数据通道应用,所述数据通道应用用于在所述第一通信设备与所述第二通信设备之间进行除语音通话或视频通话之外的通信。In response to the call response message, the first communication device sends a re-invite request message to the session control function device, wherein the re-invite request message includes first description information for establishing a first data channel, wherein the first data channel is used to download a data channel application, and the data channel application is used to conduct communications other than voice calls or video calls between the first communication device and the second communication device.
- 根据权利要求1所述的方法,其特征在于,所述re-invite请求消息还包含用于建立第二数据通道的第二描述信息,所述第二数据通道用于传输所述数据通道应用的附加通信信息,所述第一描述信息用于所述第一通信设备建立所述第一数据通道,所述第二描述信息用于所述第一通信设备建立所述第二数据通道。The method according to claim 1 is characterized in that the re-invite request message also includes second description information for establishing a second data channel, the second data channel is used to transmit additional communication information applied by the data channel, the first description information is used by the first communication device to establish the first data channel, and the second description information is used by the first communication device to establish the second data channel.
- 根据权利要求2所述的方法,其特征在于,所述方法还包括:The method according to claim 2, characterized in that the method further comprises:所述第一通信设备指示所述第二数据通道锚定到数据通道媒体功能网元;或者The first communication device instructs the second data channel to be anchored to a data channel media function network element; or所述第一通信设备指示所述第二数据通道不锚定到所述数据通道媒体功能网元。The first communication device indicates that the second data channel is not anchored to the data channel media function network element.
- 根据权利要求1所述的方法,其特征在于,所述第一数据通道还用于传输所述数据通道应用的附加通信信息。The method according to claim 1 is characterized in that the first data channel is also used to transmit additional communication information applied by the data channel.
- 根据权利要求1至4中任一项所述的方法,其特征在于,所述IMS会话为通过IMS紧急呼叫建立的会话,所述第二通信设备为公共安全应答点。The method according to any one of claims 1 to 4, characterized in that the IMS session is a session established through an IMS emergency call, and the second communication device is a public safety answering point.
- 根据权利要求1至5中任一项所述的方法,其特征在于,所述呼叫响应消息为摘机200OK响应消息。The method according to any one of claims 1 to 5, characterized in that the call response message is an off-hook 200OK response message.
- 根据权利要求1至6中任一项所述的方法,其特征在于,在所述第一通信设备接收来自第二通信设备的呼叫响应消息之前,所述方法还包括:The method according to any one of claims 1 to 6, characterized in that before the first communication device receives a call response message from the second communication device, the method further comprises:所述第一通信设备向所述第二通信设备发送初始邀请invite请求消息,所述初始invite请求消息用于请求创建所述IMS会话;The first communication device sends an initial invite request message to the second communication device, where the initial invite request message is used to request to create the IMS session;则所述呼叫响应消息为所述初始invite请求消息的响应消息。Then the call response message is a response message of the initial invite request message.
- 一种通信方法,其特征在于,包括:A communication method, comprising:会话控制功能设备接收来自第一通信设备的重邀请re-invite请求消息,所述re-invite请求消息包含用于建立第一数据通道的第一描述信息,所述第一数据通道用于下载数据通道应用,所述数据通道应用用于在所述第一通信设备与所述第二通信设备之间进行除语音通话或视频通话之外的通信,所述第一通信设备与所述第二通信设备之间的IMS会话已建立完成;The session control function device receives a re-invite request message from the first communication device, where the re-invite request message includes first description information for establishing a first data channel, where the first data channel is used to download a data channel application, where the data channel application is used to perform communication other than a voice call or a video call between the first communication device and the second communication device, and where the IMS session between the first communication device and the second communication device has been established;所述会话控制功能设备根据所述re-invite请求消息触发所述第一数据通道的建立。The session control function device triggers establishment of the first data channel according to the re-invite request message.
- 根据权利要求8所述的方法,其特征在于,所述re-invite请求消息还包含用于建立第二数据通道的第二描述信息,所述第二数据通道用于传输所述附加通信信息,所述第一描述信息第一通信设备建立所述第一数据通道,所述第二描述信息用于所述第一通信设备建立所述第二数据通道。The method according to claim 8 is characterized in that the re-invite request message also includes second description information for establishing a second data channel, the second data channel is used to transmit the additional communication information, the first description information is used by the first communication device to establish the first data channel, and the second description information is used by the first communication device to establish the second data channel.
- 根据权利要求9所述的方法,其特征在于,所述第一数据通道包括所述第一通信设备与所述数据通道媒体功能网元之间的第一引导数据通道,以及所述第二通信设备与所述数据通道媒体功能网元之间的第二引导数据通道,所述第二数据通道包括所述第一通信设备与所述数据通道媒体功能网元之间的第一应用数据通道,以及所述第二通信设备与所述数据通道媒体功能网元之间的第二应用数据通道;The method according to claim 9 is characterized in that the first data channel includes a first guide data channel between the first communication device and the data channel media function network element, and a second guide data channel between the second communication device and the data channel media function network element, and the second data channel includes a first application data channel between the first communication device and the data channel media function network element, and a second application data channel between the second communication device and the data channel media function network element;所述会话控制功能设备根据所述re-invite请求消息触发所述第一数据通道的建立,包括:The session control function device triggers establishment of the first data channel according to the re-invite request message, including:所述会话控制功能设备向数据通道媒体功能网元请求第三描述信息、第四描述信息、第五描述信息以及第六描述信息;其中,所述第三描述信息用于所述数据通道媒体功能网元建立所述第一引导数据通道,所述第四描述信息用于所述数据通道媒体功能网元建立所述第一应用数据通道,所述第五描述信息用于所述数据通道媒体功能网元建立所述第二引导数据通道,所述第六描述信息用于所述数据通道媒体功能网元建立所述第二应用数据通道;The session control function device requests the data channel media function network element for third description information, fourth description information, fifth description information and sixth description information; wherein the third description information is used by the data channel media function network element to establish the first boot data channel, the fourth description information is used by the data channel media function network element to establish the first application data channel, the fifth description information is used by the data channel media function network element to establish the second boot data channel, and the sixth description information is used by the data channel media function network element to establish the second application data channel;所述会话控制功能设备向所述第二通信设备发送请求消息,所述请求消息包括所述第五描述信息和 所述第六描述信息;The session control function device sends a request message to the second communication device, the request message including the fifth description information and the sixth description information;所述会话控制功能设备接收来自所述第二通信设备的响应消息,所述响应消息包括第七描述信息以及第八描述信息,所述第七描述信息用于所述第二通信设备建立所述第二引导数据通道,所述第八描述信息用于所述第二通信设备建立所述第二应用数据通道;The session control function device receives a response message from the second communication device, where the response message includes seventh description information and eighth description information, where the seventh description information is used by the second communication device to establish the second boot data channel, and the eighth description information is used by the second communication device to establish the second application data channel;所述会话控制功能设备向所述第一通信设备发送所述第三描述信息和所述第四描述信息,以及向所述数据通道媒体功能网元发送所述第七描述信息和所述第八描述信息。The session control function device sends the third description information and the fourth description information to the first communication device, and sends the seventh description information and the eighth description information to the data channel media function network element.
- 根据权利要求9所述的方法,其特征在于,所述第一数据通道包括所述第一通信设备与所述数据通道媒体功能网元之间的第三引导数据通道,以及所述第二通信设备与所述数据通道媒体功能网元之间的第四引导数据通道,所述第二数据通道包括所述第一通信设备与所述第二通信设备之间的第三应用数据通道;The method according to claim 9, characterized in that the first data channel includes a third pilot data channel between the first communication device and the data channel media function network element, and a fourth pilot data channel between the second communication device and the data channel media function network element, and the second data channel includes a third application data channel between the first communication device and the second communication device;所述会话控制功能设备根据所述re-invite请求消息触发所述通道的建立,包括:The session control function device triggers establishment of the channel according to the re-invite request message, including:所述会话控制功能设备向所述数据通道媒体功能网元请求第九描述信息和第十描述信息,所述第九描述信息用于所述数据通道媒体功能网元建立所述第三引导数据通道,所述第十描述信息用于所述数据通道媒体功能网元建立所述第四引导数据通道;The session control function device requests the data channel media function network element for ninth description information and tenth description information, wherein the ninth description information is used by the data channel media function network element to establish the third guided data channel, and the tenth description information is used by the data channel media function network element to establish the fourth guided data channel;所述会话控制功能设备向所述第二通信设备发送请求消息,所述请求消息包括所述第二描述信息和所述第十描述信息;The session control function device sends a request message to the second communication device, where the request message includes the second description information and the tenth description information;所述会话控制功能设备接收来自所述第二通信设备的响应消息,所述响应消息包括第十一描述信息和第十二描述信息,所述第十一描述信息用于所述第二通信设备建立所述第四引导数据通道,所述第十二描述信息用于所述第二通信设备建立所述第三应用数据通道;The session control function device receives a response message from the second communication device, the response message including eleventh description information and twelfth description information, the eleventh description information is used by the second communication device to establish the fourth boot data channel, and the twelfth description information is used by the second communication device to establish the third application data channel;所述会话控制功能设备向所述第一通信设备发送所述第九描述信息和所述第十二描述信息,以及向所述数据通道媒体功能网元发送所述第十一描述信息。The session control function device sends the ninth description information and the twelfth description information to the first communication device, and sends the eleventh description information to the data channel media function network element.
- 根据权利要求8所述的方法,其特征在于,所述第一数据通道还用于传输所述附加通信信息。The method according to claim 8 is characterized in that the first data channel is also used to transmit the additional communication information.
- 根据权利要求8至12中任一项所述的方法,其特征在于,所述会话控制功能设备为多媒体电话应用服务器;The method according to any one of claims 8 to 12, characterized in that the session control function device is a multimedia telephone application server;在所述会话控制功能设备接收来自第一通信设备的重邀请re-invite请求消息之前,所述方法还包括:Before the session control function device receives a re-invite request message from the first communication device, the method further includes:所述会话控制功能设备接收来自所述第一通信设备的初始邀请invite请求消息,所述初始invite请求消息用于所述第一通信设备请求建立所述IMS会话;The session control function device receives an initial invite request message from the first communication device, where the initial invite request message is used by the first communication device to request to establish the IMS session;所述会话控制功能设备根据所述初始invite请求消息,压制触发建立所述第一数据通道。The session control function device suppresses the triggering of establishing the first data channel according to the initial invite request message.
- 根据权利要求8至12中任一项所述的方法,其特征在于,所述IMS会话为通过IMS紧急呼叫建立的会话,所述会话控制功能设备为紧急呼叫会话控制功能网元或者多媒体电话应用服务器,所述第二通信设备为公共安全应答点。The method according to any one of claims 8 to 12 is characterized in that the IMS session is a session established through an IMS emergency call, the session control function device is an emergency call session control function network element or a multimedia telephone application server, and the second communication device is a public safety answering point.
- 一种通信方法,其特征在于,包括:A communication method, comprising:第二通信设备向第一通信设备发送呼叫响应消息,所述呼叫响应消息用于指示第一通信设备与所述第二通信设备之间的互联网协议多媒体子系统IMS会话建立完成;The second communication device sends a call response message to the first communication device, where the call response message is used to indicate that the establishment of the Internet Protocol Multimedia Subsystem IMS session between the first communication device and the second communication device is complete;响应于所述呼叫响应消息,所述第一通信设备发送重邀请re-invite请求消息,所述re-invite请求消息包含用于建立第一数据通道的第一描述信息,所述第一数据通道用于下载数据通道应用,所述数据通道应用用于在所述第一通信设备与所述第二通信设备之间进行除语音通话或视频通话之外的通信;In response to the call response message, the first communication device sends a re-invite request message, where the re-invite request message includes first description information for establishing a first data channel, where the first data channel is used to download a data channel application, where the data channel application is used to perform communication other than a voice call or a video call between the first communication device and the second communication device;所述会话控制功能设备接收来自所述第一通信设备的所述re-invite请求消息;The session control function device receives the re-invite request message from the first communication device;所述会话控制功能设备根据所述re-invite请求消息触发所述第一数据通道的建立。The session control function device triggers establishment of the first data channel according to the re-invite request message.
- 根据权利要求15所述的方法,其特征在于,所述re-invite请求消息还包含用于建立第二数据通道的第二描述信息,所述第二数据通道用于传输所述附加通信信息,所述第一描述信息用于所述第一通信设备建立所述第一数据通道,所述第二描述信息用于所述第一通信设备建立所述第二数据通道。The method according to claim 15 is characterized in that the re-invite request message also includes second description information for establishing a second data channel, the second data channel is used to transmit the additional communication information, the first description information is used by the first communication device to establish the first data channel, and the second description information is used by the first communication device to establish the second data channel.
- 根据权利要求16所述的方法,其特征在于,所述第一数据通道包括所述第一通信设备与所述数据通道媒体功能网元之间的第一引导数据通道,以及所述第二通信设备与所述数据通道媒体功能网元之间的第二引导数据通道,所述第二数据通道包括所述第一通信设备与所述数据通道媒体功能网元之间的第一应用数据通道,以及第二通信设备与所述数据通道媒体功能网元之间的第二应用数据通道;The method according to claim 16, characterized in that the first data channel includes a first guide data channel between the first communication device and the data channel media function network element, and a second guide data channel between the second communication device and the data channel media function network element, and the second data channel includes a first application data channel between the first communication device and the data channel media function network element, and a second application data channel between the second communication device and the data channel media function network element;所述会话控制功能设备根据所述re-invite请求消息触发所述第一数据通道的建立,包括:The session control function device triggers establishment of the first data channel according to the re-invite request message, including:所述会话控制功能设备向数据通道媒体功能网元请求第三描述信息、第四描述信息、第五描述信息 以及第六描述信息;其中,所述第三描述信息用于所述数据通道媒体功能网元建立所述第一引导数据通道,所述第四描述信息用于所述数据通道媒体功能网元建立所述第一应用数据通道,所述第五描述信息用于所述数据通道媒体功能网元建立所述第二引导数据通道,所述第六描述信息用于所述数据通道媒体功能网元建立所述第二应用数据通道;The session control function device requests the data channel media function network element for the third description information, the fourth description information, and the fifth description information. and sixth description information; wherein the third description information is used by the data channel media function network element to establish the first guide data channel, the fourth description information is used by the data channel media function network element to establish the first application data channel, the fifth description information is used by the data channel media function network element to establish the second guide data channel, and the sixth description information is used by the data channel media function network element to establish the second application data channel;所述会话控制功能设备向所述第二通信设备发送请求消息,所述请求消息包括所述第五描述信息和所述第六描述信息;The session control function device sends a request message to the second communication device, where the request message includes the fifth description information and the sixth description information;所述会话控制功能设备接收来自所述第二通信设备的响应消息,所述响应消息包括第七描述信息以及第八描述信息,所述第七描述信息用于所述第二通信设备建立所述第二引导数据通道,所述第八描述信息用于所述第二通信设备建立所述第二应用数据通道;The session control function device receives a response message from the second communication device, where the response message includes seventh description information and eighth description information, where the seventh description information is used by the second communication device to establish the second boot data channel, and the eighth description information is used by the second communication device to establish the second application data channel;所述会话控制功能设备向所述第一通信设备发送所述第三描述信息和所述第四描述信息,以及向所述数据通道媒体功能网元发送所述第七描述信息和所述第八描述信息。The session control function device sends the third description information and the fourth description information to the first communication device, and sends the seventh description information and the eighth description information to the data channel media function network element.
- 根据权利要求16所述的方法,其特征在于,所述第一数据通道包括所述第一通信设备与所述数据通道媒体功能网元之间的第三引导数据通道,以及所述第二通信设备与所述数据通道媒体功能网元之间的第四引导数据通道,所述第二数据通道包括所述第一通信设备与所述第二通信设备之间的第三应用数据通道;The method according to claim 16, characterized in that the first data channel includes a third pilot data channel between the first communication device and the data channel media function network element, and a fourth pilot data channel between the second communication device and the data channel media function network element, and the second data channel includes a third application data channel between the first communication device and the second communication device;所述会话控制功能设备根据所述re-invite请求消息触发所述通道的建立,包括:The session control function device triggers establishment of the channel according to the re-invite request message, including:所述会话控制功能设备向所述数据通道媒体功能网元请求第九描述信息和第十描述信息,所述第九描述信息用于所述数据通道媒体功能网元建立所述第三引导数据通道,所述第十描述信息用于所述数据通道媒体功能网元建立所述第四引导数据通道;The session control function device requests the data channel media function network element for ninth description information and tenth description information, wherein the ninth description information is used by the data channel media function network element to establish the third guided data channel, and the tenth description information is used by the data channel media function network element to establish the fourth guided data channel;所述会话控制功能设备向所述第二通信设备发送请求消息,所述请求消息包括所述第二描述信息和所述第十描述信息;The session control function device sends a request message to the second communication device, where the request message includes the second description information and the tenth description information;所述会话控制功能设备接收来自所述第二通信设备的响应消息,所述响应消息包括第十一描述信息和第十二描述信息,所述第十一描述信息用于所述第二通信设备建立所述第四引导数据通道,所述第十二描述信息用于所述第二通信设备建立所述第三应用数据通道;The session control function device receives a response message from the second communication device, the response message including eleventh description information and twelfth description information, the eleventh description information is used by the second communication device to establish the fourth boot data channel, and the twelfth description information is used by the second communication device to establish the third application data channel;所述会话控制功能设备向所述第一通信设备发送所述第九描述信息和所述第十二描述信息,以及向所述数据通道媒体功能网元发送所述第十一描述信息。The session control function device sends the ninth description information and the twelfth description information to the first communication device, and sends the eleventh description information to the data channel media function network element.
- 根据权利要求15所述的方法,其特征在于,所述第一数据通道还用于传输所述附加通信信息。The method according to claim 15 is characterized in that the first data channel is also used to transmit the additional communication information.
- 根据权利要求15至19中任一项所述的方法,其特征在于,所述会话控制功能设备为多媒体电话应用服务器;The method according to any one of claims 15 to 19, characterized in that the session control function device is a multimedia telephone application server;在所述会话控制功能设备接收来自第一通信设备的重邀请re-invite请求消息之前,所述方法还包括:Before the session control function device receives a re-invite request message from the first communication device, the method further includes:所述会话控制功能设备接收来自所述第一通信设备的初始邀请invite请求消息,所述初始invite请求消息用于所述第一通信设备请求建立所述IMS会话;The session control function device receives an initial invite request message from the first communication device, where the initial invite request message is used by the first communication device to request to establish the IMS session;所述会话控制功能设备根据所述初始invite请求消息,压制触发建立所述第一数据通道。The session control function device suppresses the triggering of establishing the first data channel according to the initial invite request message.
- 根据权利要求15至19中任一项所述的方法,其特征在于,所述IMS会话为通过IMS紧急呼叫建立的会话,所述会话控制网元为紧急呼叫会话控制功能网元或者多媒体电话应用服务器,所述第二通信设备为公共安全应答点。The method according to any one of claims 15 to 19 is characterized in that the IMS session is a session established through an IMS emergency call, the session control network element is an emergency call session control function network element or a multimedia telephone application server, and the second communication device is a public safety answering point.
- 一种通信装置,其特征在于,所述装置包括:用于执行如权利要求1至7中任一项所述的方法的模块,或者用于执行如权利要求8至14中任一项所述的方法的模块。A communication device, characterized in that the device comprises: a module for executing the method as claimed in any one of claims 1 to 7, or a module for executing the method as claimed in any one of claims 8 to 14.
- 一种通信装置,其特征在于,包括:A communication device, comprising:处理器,用于执行存储器中存储的计算机程序,以使得所述装置执行如权利要求1至7中任一项所述的方法,或者以使得所述装置执行如权利要求8至14中任一项所述的方法。A processor, configured to execute a computer program stored in a memory, so that the apparatus performs the method according to any one of claims 1 to 7, or so that the apparatus performs the method according to any one of claims 8 to 14.
- 一种计算机程序产品,其特征在于,所述计算机程序产品包括用于执行如权利要求1至7中任一项所述的方法的指令,或者,所述计算机程序产品包括用于执行如权利要求8至14中任一项所述的方法的指令。A computer program product, characterized in that the computer program product comprises instructions for executing the method as claimed in any one of claims 1 to 7, or the computer program product comprises instructions for executing the method as claimed in any one of claims 8 to 14.
- 一种计算机可读存储介质,其特征在于,包括:所述计算机可读存储介质存储有计算机程序;所述计算机程序在计算机上运行时,使得所述计算机执行如权利要求1至7中任一项所述的方法,或者使得所述计算机执行如权利要求8至14中任一项所述的方法。A computer-readable storage medium, characterized in that it includes: the computer-readable storage medium stores a computer program; when the computer program is run on a computer, the computer executes the method as described in any one of claims 1 to 7, or the computer executes the method as described in any one of claims 8 to 14.
- 一种通信系统,其特征在于,包括第一通信设备和会话功能控制网元, A communication system, characterized in that it comprises a first communication device and a session function control network element,其中,所述第一通信设备用于执行如权利要求1至7中任一项所述的方法,所述会话控制功能设备用于执行如权利要求8至14中任一项所述的方法。 The first communication device is used to execute the method according to any one of claims 1 to 7, and the session control function device is used to execute the method according to any one of claims 8 to 14.
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102075737A (en) * | 2011-03-01 | 2011-05-25 | 天津市天祥世联网络科技有限公司 | Video monitoring conversation method |
CN103118044A (en) * | 2011-11-16 | 2013-05-22 | 华为终端有限公司 | Content distribution business session management method, system and device |
US20180132291A1 (en) * | 2016-11-04 | 2018-05-10 | T-Mobile Usa, Inc. | SIP Call Continuity Upon Failure |
CN113709190A (en) * | 2021-10-27 | 2021-11-26 | 中兴通讯股份有限公司 | Service setting method and device, storage medium and electronic equipment |
-
2022
- 2022-11-02 CN CN202211364765.4A patent/CN117997877A/en active Pending
-
2023
- 2023-10-24 WO PCT/CN2023/126171 patent/WO2024093726A1/en unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102075737A (en) * | 2011-03-01 | 2011-05-25 | 天津市天祥世联网络科技有限公司 | Video monitoring conversation method |
CN103118044A (en) * | 2011-11-16 | 2013-05-22 | 华为终端有限公司 | Content distribution business session management method, system and device |
US20180132291A1 (en) * | 2016-11-04 | 2018-05-10 | T-Mobile Usa, Inc. | SIP Call Continuity Upon Failure |
CN113709190A (en) * | 2021-10-27 | 2021-11-26 | 中兴通讯股份有限公司 | Service setting method and device, storage medium and electronic equipment |
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