WO2022198410A1 - 通信方法及装置 - Google Patents

通信方法及装置 Download PDF

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Publication number
WO2022198410A1
WO2022198410A1 PCT/CN2021/082178 CN2021082178W WO2022198410A1 WO 2022198410 A1 WO2022198410 A1 WO 2022198410A1 CN 2021082178 W CN2021082178 W CN 2021082178W WO 2022198410 A1 WO2022198410 A1 WO 2022198410A1
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WO
WIPO (PCT)
Prior art keywords
terminal
transmission mode
access network
capability information
multicast
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Application number
PCT/CN2021/082178
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English (en)
French (fr)
Inventor
李濛
杨艳梅
应江威
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2021/082178 priority Critical patent/WO2022198410A1/zh
Publication of WO2022198410A1 publication Critical patent/WO2022198410A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/16—Arrangements for providing special services to substations
    • H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/26—Network addressing or numbering for mobility support

Definitions

  • the present application relates to the field of wireless communication, and in particular, to a communication method and apparatus.
  • the network-side device that sends data of multicast services to multiple terminals (for example, terminals in a multicast group) (which may be referred to as multicast later on). data), that is, point-to-multipoint data transmission requirements.
  • the network-side device can communicate with the multiple terminals by adopting the transmission mode of the multicast service.
  • the transmission mode of the multicast service includes an individual delivery mode (individual delivery mode) or a shared delivery mode (shared delivery mode).
  • the network-side device can establish transmission channels for multiple terminals respectively, so that the network-side device can send multicast data to each terminal through each transmission channel.
  • the transmission channels corresponding to different terminals are different, and the network resources corresponding to different transmission channels are also different. Therefore, more network resources are occupied in the process of transmitting multicast data through a separate transmission mode.
  • the separate transmission mode has lower requirements on the network side equipment and is easier to implement.
  • the network-side device can establish a transmission channel for multiple terminals, so that the network-side device can send multicast data to multiple terminals through this transmission channel.
  • multiple terminals can share network resources, which can save network resources and improve the utilization rate of network resources.
  • the shared transmission mode is more complicated to implement and has higher requirements on the network side equipment.
  • the network-side equipment sends multicast data to multiple terminals
  • the network-side equipment communicates with the terminals in a fixed transmission mode, and the communication flexibility is poor.
  • the present application provides a communication method and device, which can determine the transmission mode of the multicast service of the terminal for the network side equipment and the terminal, and improve the flexibility of communication.
  • an embodiment of the present application provides a communication method, the method includes: a network-side device determines a transmission mode of a multicast service of a first terminal, wherein the transmission mode is an individual transmission mode or a shared transmission mode, and the network-side device determines a transmission mode of a multicast service of a first terminal. It is an access network device or a mobility management network element; the network side device sends first indication information to the session management network element, where the first indication information is used to indicate the transmission mode of the multicast service.
  • the network side device can determine the transmission mode of the multicast service of the first terminal, and indicate the transmission mode to the session management network element, so that the session management network element can allocate the transmission mode for the first terminal to the first terminal.
  • the first resource of multicast data can improve the flexibility of communication while realizing multicast data transmission.
  • the network side device determines the transmission mode of the multicast service of the first terminal, including: the network side device determines the transmission mode according to the multicast/broadcast service (multicast/broadcast service, MBS) capability of the access network device. , where the MBS capability of the access network device is whether the access network device supports the shared transmission mode. Based on the above method, the network side device may determine the transmission mode of the multicast service of the first terminal according to whether the access network device supports the shared transmission mode, so as to transmit the multicast data through the transmission mode.
  • MBS multicast/broadcast service
  • the network side device determines the transmission mode according to the MBS capability of the access network device, including: if the MBS capability of the access network device is that the access network device supports the shared transmission mode, the network side device determines that the transmission mode is: shared transmission mode; or, if the MBS capability of the access network device is that the access network device does not support the shared transmission mode, the network side device determines that the transmission mode is the individual transmission mode.
  • the network side device can determine the transmission mode as the shared transmission mode, so as to save network resources and improve the utilization rate of network resources.
  • the network side device may determine that the transmission mode is the individual transmission mode, so as to reduce the complexity of multicast data transmission.
  • the network side device determines the transmission mode according to the MBS capability of the access network device, including: the network side device determines the transmission mode according to the MBS capability of the access network device and the MBS capability information of the first terminal; or, The network side device determines the transmission mode according to the MBS capability of the access network device, the MBS capability information of the first terminal, and the number of terminals that have joined the multicast service; wherein, the MBS capability information of the first terminal indicates whether the first terminal supports sharing transfer mode.
  • the network side device can determine the transmission mode in various ways to meet the transmission requirements in different scenarios.
  • the network-side device may not consider the number of terminals that have joined the multicast service in the process of determining the transmission mode; if the transmission resources are insufficient, the network-side device may consider the number of terminals that have joined the multicast service in the process of determining the transmission mode.
  • the number of terminals that have joined the multicast service If the number of terminals that have joined the multicast service is large, the transmission mode can be determined as a shared transmission mode, so as to save network resources and improve the utilization rate of network resources.
  • the network side device determines the transmission mode according to the MBS capability of the access network device and the MBS capability information of the first terminal, including: if the MBS capability of the access network device is that the access network device supports the shared transmission mode , and the MBS capability information of the first terminal indicates that the first terminal supports the shared transmission mode, the network side device determines that the transmission mode is the shared transmission mode; or, if the MBS capability of the access network device is that the access network device does not support the shared transmission mode , or the MBS capability information of the first terminal indicates that the first terminal does not support the shared transmission mode, and the network side device determines that the transmission mode is the individual transmission mode.
  • the network side device may determine the transmission mode as the shared transmission mode to save network resources and improve utilization of network resources. In the case that the access network device does not support the shared transmission mode, or the first terminal does not support the shared transmission mode, the network side device may determine that the transmission mode is the individual transmission mode to reduce the complexity of multicast data transmission.
  • the network side device determines the transmission mode according to the MBS capability of the access network device, the MBS capability information of the first terminal, and the number of terminals that have joined the multicast service, including: if the MBS of the access network device The capability is that the access network device supports the shared transmission mode, the MBS capability information of the first terminal indicates that the first terminal supports the shared transmission mode, and the number of terminals that have joined the multicast service is greater than or equal to the first threshold, then the network side device determines the transmission The mode is the shared transmission mode; or, if the MBS capability of the access network device is that the access network device supports the shared transmission mode, the MBS capability information of the first terminal indicates that the first terminal supports the shared transmission mode and has joined the multicast service.
  • the network side device determines that the transmission mode is the individual transmission mode. Based on the above method, when the access network device supports the shared transmission mode, the first terminal supports the shared transmission mode, and the number of terminals that have joined the multicast service is greater than or equal to the first threshold, the network-side device may determine that the transmission mode is shared Transmission mode to save network resources and improve the utilization of network resources. In the case that the access network device supports the shared transmission mode, the first terminal supports the shared transmission mode, and the number of terminals that have joined the multicast service is less than the first threshold, the network-side device may determine that the transmission mode is the individual transmission mode, so as to reduce multiple The complexity of multicast data transmission is reduced, and the success rate of the first terminal receiving multicast data is improved.
  • the network side device is an access network device
  • the method further includes: the network side device receives MBS capability information of the first terminal from the first terminal. Based on the above method, when the network-side device is an access network device, the network-side device may acquire the MBS capability information of the first terminal from the first terminal.
  • the MBS capability information of the first terminal is included in the wireless capability information of the first terminal. Based on the above method, when reporting the wireless capability information of the first terminal to the access network device, the first terminal may report the MBS capability information of the first terminal to the access network device.
  • the network side device is an access network device
  • the method further includes: the network side device receives the MBS capability information of the first terminal from the mobility management network element. Based on the above method, when the network side device is an access network device, the network side device may acquire the MBS capability information of the first terminal from the mobility management network element.
  • the MBS capability information of the first terminal is included in the core network capability information of the first terminal.
  • the mobility management network element may send the MBS capability information of the first terminal to the access network device when sending the core network capability information of the first terminal to the access network device.
  • the network side device is an access network device, the network side device determines that the transmission mode is the independent transmission mode, the first indication information is included in the rejection message, and the rejection message is used to indicate that the shared transmission mode is rejected and the first terminal communication. Based on the above method, if the network-side device is an access network device, and the network-side device determines that the transmission mode is the independent transmission mode, the network-side device may indicate that the transmission mode is the independent transmission mode through a rejection message.
  • the network side device is an access network device, and the method further includes: the network side device receives the multicast information of the multicast group from the session management network element, and the multicast information of the multicast group is used for Indicates requirements for multicast services. Based on the above method, the network-side device can be triggered to determine the transmission mode of the multicast service of the first terminal through the multicast information of the multicast group.
  • the network side device is a mobility management network element
  • the method further includes: the network side device receives the MBS capability information of the access network device from the access network device, and uses the MBS capability information of the access network device to It is used to indicate the MBS capability of the access network equipment.
  • the network-side device can acquire the MBS capability information of the access network device from the access network device, so that the network-side device can determine the multicast service of the first terminal. transfer mode.
  • the MBS capability information of the access network device is included in the NG interface application protocol establishment message. Based on the above method, the MBS capability information of the access network device can be sent to the mobility management network element through the NG interface application protocol establishment message.
  • the network side device is a mobility management network element
  • the method further includes: the network side device receives MBS capability information of the first terminal from the first terminal. Based on the above method, when the network-side device is a mobility management network element, the network-side device can obtain the MBS capability information of the first terminal from the first terminal, so that the network-side device can determine the transmission mode of the multicast service of the first terminal .
  • the MBS capability information of the first terminal is included in the registration request message, or the MBS capability information of the first terminal is included in the request message for joining the multicast group of the multicast service.
  • the MBS capability information of the first terminal may be sent to the mobility management network element through a registration request message or a request message for joining a multicast group of a multicast service.
  • an embodiment of the present application provides a communication method, the method includes: a session management network element receives first indication information from a network side device, wherein the network side device is an access network device or a mobility management network element, The first indication information is used to indicate the transmission mode of the multicast service of the first terminal, and the transmission mode is a separate transmission mode or a shared transmission mode; the session management network element allocates, according to the first indication information, for the first terminal to transmit multicast data first resource.
  • the session management network element can allocate corresponding resources to the first terminal according to the transmission mode of the multicast service of the first terminal determined by the network side device, so as to realize the transmission of multicast data.
  • the first indication information indicates that the transmission mode is a separate transmission mode
  • the session management network element allocates the first resource for transmitting multicast data to the first terminal according to the first indication information, including: a session management network
  • the element establishes a first transmission channel, and the first transmission channel is used to transmit data between the multicast user plane network element and the unicast user plane network element.
  • the multicast user plane network element can send the multicast data to the unicast user plane network element through the first transmission channel. data, so that the unicast user plane network element sends multicast data to the first terminal through the access network device.
  • the session management network element is a unicast session management network element, and the session management network element allocates the first resource for transmitting multicast data to the first terminal according to the first indication information, and further includes: session management The network element establishes a second transmission channel, and the second transmission channel is used for transmitting multicast data between the unicast user plane network element and the access network equipment. Based on the above method, after receiving the multicast data, the unicast user plane network element can send the multicast data to the access network device through the second transmission channel, so that the access network device can send the multicast data to the first terminal.
  • the first indication information indicates that the transmission mode is a shared transmission mode
  • the session management network element allocates the first resource for transmitting multicast data to the first terminal according to the first indication information, including: a session management network
  • the element establishes a third transmission channel, and the third transmission channel is used to transmit multicast data between the multicast user plane network element and the access network equipment.
  • the multicast user plane network element can send the multicast data to the access network device through the third transmission channel, So that the access network device sends the multicast data to the first terminal.
  • an embodiment of the present application provides a communication method, wherein the method includes: the first terminal acquires MBS capability information of the first terminal, wherein the MBS capability information of the first terminal indicates whether the first terminal supports sharing Transmission mode: the first terminal sends the MBS capability information of the first terminal to the network side device, and the network side device is an access network device or a mobility management network element.
  • the first terminal may send the MBS capability information of the first terminal to the network-side device, so that the network-side device determines the transmission mode of the multicast service of the first terminal.
  • the MBS capability information of the first terminal is included in the wireless capability information of the first terminal.
  • the first terminal may report the first terminal's MBS capability information to the network side device when reporting the first terminal's wireless capability information.
  • the MBS capability information of the first terminal is included in the registration request message, or the MBS capability information of the first terminal is included in the multicast joining the first terminal.
  • the request message of the multicast group of the service If the network-side device is a mobility management network element, the first terminal may send the first terminal's MBS capability information to the network-side device through a registration request message or a request message to join a multicast group of the first terminal's multicast service .
  • an embodiment of the present application provides a communication method, the method comprising: a mobility management network element acquiring MBS capability information of a first terminal, wherein the MBS capability information of the first terminal indicates whether the first terminal supports a shared transmission mode ; The mobility management network element sends the MBS capability information of the first terminal to the access network device.
  • the mobility management network element may send the MBS capability information of the first terminal to the access network device, so that the access network device determines the transmission mode of the multicast service of the first terminal.
  • the method further includes: the mobility management network element determines that the first terminal requests to join the multicast service of the first terminal multicast group. Based on the above method, the mobility management network element may send the MBS capability information of the first terminal to the access network device when determining that the first terminal requests to join the multicast group of the multicast service of the first terminal. In this way, signaling overhead can be saved.
  • the MBS capability information of the first terminal is included in the core network capability information of the first terminal.
  • the mobility management network element may send the MBS capability information of the first terminal to the access network device when sending the core network capability information of the first terminal to the access network device.
  • an embodiment of the present application provides a communication method, the method includes: an access network device acquires MBS capability information of the access network device, wherein the MBS capability information of the access network device is used to indicate the access network device's MBS capability information.
  • MBS capability the MBS capability of the access network device is whether the access network device supports the shared transmission mode; the access network device sends the MBS capability information of the access network device to the mobility management network element.
  • the access network device can send the MBS capability information of the access network device to the mobility management network element, so that the mobility management network element can determine the multiple access network equipment of the first terminal according to the MBS capability of the access network device.
  • the transmission mode of the broadcast service can be used to determine the multiple access network equipment of the first terminal according to the MBS capability of the access network device.
  • the MBS capability information of the access network device is included in the NG interface application protocol establishment message. Based on the above method, the access network device can send the MBS capability information of the access network device to the mobility management network element through the NG interface application protocol establishment message.
  • an embodiment of the present application provides a communication apparatus, which can implement the method in the first aspect or any possible implementation manner of the first aspect.
  • the apparatus comprises corresponding units or components for carrying out the above-described method.
  • the units included in the apparatus may be implemented by software and/or hardware.
  • the apparatus may be, for example, a network-side device, or a chip, a chip system, or a processor that can support the network-side device to implement the above method.
  • an embodiment of the present application provides a communication apparatus, which can implement the method in the second aspect or any possible implementation manner of the second aspect.
  • the apparatus comprises corresponding units or components for carrying out the above-described method.
  • the units included in the apparatus may be implemented by software and/or hardware.
  • the apparatus may be, for example, a session management network element, or a chip, a chip system, or a processor that can support the session management network element to implement the above method.
  • an embodiment of the present application provides a communication device, which can implement the method in the third aspect or any possible implementation manner of the third aspect.
  • the apparatus comprises corresponding units or components for carrying out the above-described method.
  • the units included in the apparatus may be implemented by software and/or hardware.
  • the apparatus may be, for example, a first terminal, or a chip, a chip system, or a processor that can support the first terminal to implement the above method.
  • an embodiment of the present application provides a communication device, which can implement the method in the fourth aspect or any possible implementation manner of the fourth aspect.
  • the apparatus comprises corresponding units or components for carrying out the above-described method.
  • the units included in the apparatus may be implemented by software and/or hardware.
  • the apparatus can be, for example, a mobility management network element, or a chip, a chip system, or a processor that can support the mobility management network element to implement the above method.
  • an embodiment of the present application provides a communication apparatus, which can implement the method in the fifth aspect or any possible implementation manner of the fifth aspect.
  • the apparatus comprises corresponding units or components for carrying out the above-described method.
  • the units included in the apparatus may be implemented by software and/or hardware.
  • the apparatus may be, for example, an access network device, or a chip, a chip system, or a processor that can support the access network device to implement the above method.
  • an embodiment of the present application provides a communication device, including: a processor, where the processor is coupled to a memory, and the memory is used to store a program or an instruction, and when the program or instruction is executed by the processor At the time, the apparatus is made to implement the method described in the first aspect or any possible implementation manner of the first aspect.
  • an embodiment of the present application provides a communication device, including: a processor, where the processor is coupled to a memory, and the memory is used to store a program or an instruction, and when the program or instruction is executed by the processor At the time, the apparatus is made to implement the method described in the second aspect or any of the possible implementation manners of the second aspect.
  • an embodiment of the present application provides a communication device, including: a processor, where the processor is coupled to a memory, and the memory is used to store a program or an instruction, and when the program or instruction is executed by the processor , the device is made to implement the method described in the third aspect or any of the possible implementation manners of the third aspect.
  • an embodiment of the present application provides a communication device, including: a processor, the processor is coupled to a memory, and the memory is used to store a program or an instruction, when the program or instruction is executed by the processor , the device is made to implement the method described in the fourth aspect or any possible implementation manner of the fourth aspect.
  • an embodiment of the present application provides a communication apparatus, including: a processor, where the processor is coupled to a memory, and the memory is used for storing a program or an instruction, and when the program or the instruction is executed by the processor , the device is made to implement the method described in the fifth aspect or any possible implementation manner of the fifth aspect.
  • an embodiment of the present application provides a chip system, where the chip system includes at least one processor configured to support implementing the functions involved in the first aspect or any possible implementation manner of the first aspect, For example, data and/or information involved in the above-described methods are transceived or processed.
  • an embodiment of the present application provides a chip system, where the chip system includes at least one processor configured to support implementing the functions involved in the second aspect or any possible implementation manner of the second aspect, For example, data and/or information involved in the above-described methods are transceived or processed.
  • an embodiment of the present application provides a chip system, where the chip system includes at least one processor, configured to support implementing the functions involved in the third aspect or any possible implementation manner of the third aspect, For example, data and/or information involved in the above-described methods are transceived or processed.
  • an embodiment of the present application provides a chip system, where the chip system includes at least one processor, configured to support implementing the functions involved in the fourth aspect or any possible implementation manner of the fourth aspect, For example, data and/or information involved in the above-described methods are transceived or processed.
  • an embodiment of the present application provides a chip system, where the chip system includes at least one processor, configured to support implementing the functions involved in the fifth aspect or any possible implementation manner of the fifth aspect, For example, data and/or information involved in the above-described methods are transceived or processed.
  • the chip system further includes a memory for storing program instructions and data, memory is either inside the processor or outside the processor.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • an embodiment of the present application provides a computer-readable medium on which a computer program or instruction is stored, and when the computer program or instruction is executed, causes a computer to execute the first aspect or any one of the first aspect. methods described in possible implementations.
  • an embodiment of the present application provides a computer-readable medium on which a computer program or instruction is stored, and when the computer program or instruction is executed, causes a computer to execute the second aspect or any one of the second aspect. methods described in possible implementations.
  • an embodiment of the present application provides a computer-readable medium on which a computer program or instruction is stored, and when the computer program or instruction is executed, causes a computer to execute the third aspect or any one of the third aspect. methods described in possible implementations.
  • an embodiment of the present application provides a computer-readable medium on which a computer program or instruction is stored, and when the computer program or instruction is executed, causes a computer to execute the fourth aspect or any one of the fourth aspect. methods described in possible implementations.
  • an embodiment of the present application provides a computer-readable medium on which a computer program or instruction is stored, and when the computer program or instruction is executed, causes a computer to execute the fifth aspect or any one of the fifth aspect. methods described in possible implementations.
  • an embodiment of the present application provides a computer program product, which includes computer program code, and when the computer program code runs on a computer, enables the computer to execute the first aspect or any possibility of the first aspect method described in the implementation of .
  • an embodiment of the present application provides a computer program product, which includes computer program code, and when the computer program code runs on a computer, enables the computer to execute the second aspect or any possibility of the second aspect. method described in the implementation of .
  • an embodiment of the present application provides a computer program product, which includes computer program code, and when the computer program code is run on a computer, enables the computer to execute the third aspect or any possibility of the third aspect method described in the implementation of .
  • an embodiment of the present application provides a computer program product, which includes computer program code, and when the computer program code runs on a computer, enables the computer to execute the fourth aspect or any of the fourth aspects. method described in the implementation of .
  • an embodiment of the present application provides a computer program product, which includes computer program code, and when the computer program code is run on a computer, the computer program code enables the computer to execute the fifth aspect or any of the possible possibilities of the fifth aspect. Implement the method described in the method.
  • an embodiment of the present application provides a communication system.
  • the system includes the apparatus of the sixth aspect and/or the seventh aspect and/or the eighth aspect and/or the ninth aspect and/or the tenth aspect, or the system includes the aforementioned eleventh aspect and/or the tenth aspect
  • any of the communication devices, chip systems, computer-readable media, computer program products or communication systems provided above are all used to execute the corresponding methods provided above, and therefore, the beneficial effects that can be achieved.
  • the beneficial effects in the corresponding method can be referred to, and details are not repeated here.
  • 1A is a schematic diagram of a transmission mode
  • 1B is a schematic diagram of another transmission mode
  • 1C is a schematic diagram of another transmission mode
  • 1D is a schematic diagram of another transmission mode
  • 2A is a schematic diagram of the architecture of a communication system
  • 2B is a schematic diagram of the architecture of a 5G communication system
  • FIG. 3 is a schematic diagram of a hardware structure of a communication device provided by an embodiment of the present application.
  • FIG. 4 is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • FIG. 5 is a schematic flowchart of another communication method provided by an embodiment of the present application.
  • FIG. 6 is a schematic flowchart of another communication method provided by an embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of a communication device according to an embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of another communication device provided by an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of another communication device provided by an embodiment of the present application.
  • FIG. 10 is a schematic diagram of the composition of a communication system according to an embodiment of the present application.
  • the network-side device in a scenario where a network-side device sends multicast data to multiple terminals (for example, terminals in a multicast group), the network-side device can send multicast data to multiple terminals in a separate transmission mode, or Multicast data can be sent to multiple terminals in a shared transmission mode.
  • the individual transmission mode and the shared transmission mode are introduced separately below.
  • Sending multicast data to multiple terminals by a network-side device in a separate transmission mode may mean that after the user plane network element obtains the multicast data, it sends the multicast data to the access network device in a separate transmission mode, and the access network device receives the multicast data. After multicasting the data, the multicast data is sent to multiple terminals in a separate transmission mode.
  • the network-side device may send multicast data to multiple terminals in a separate transmission mode, as shown in FIG. 1A .
  • the user plane network element after acquiring the multicast data, the user plane network element sends the multicast data to the access network device through the transmission channel 101 , the transmission channel 102 and the transmission channel 103 respectively.
  • the access network device After receiving the multicast data, the access network device sends the multicast data to the terminal 1, the terminal 2 and the terminal 3 through the transmission channel 104, the transmission channel 105 and the transmission channel 106, respectively.
  • multicast data is transmitted from the user plane network element to the terminal through a separate transmission channel (ie, a separate transmission channel, such as transmission channel 101 or transmission channel 105). That is to say, in the process of transmitting multicast data, different terminals correspond to different transmission channels, and different transmission channels correspond to different network resources. Therefore, many network resources are occupied in the process of transmitting multicast data through the separate transmission mode.
  • the separate transmission mode has lower requirements on the network side equipment and is easier to implement.
  • the network-side device sending multicast data to multiple terminals in a separate transmission mode can also be understood as: a data network (DN) sends multicast data to a multicast user plane network element, and the multicast data can be 1 serving can also be multiple servings.
  • DN data network
  • the multicast user plane network element After receiving the multicast data, the multicast user plane network element sends the multicast data to the access network device through different unicast sessions (eg, transmission channel 101, transmission channel 102, and transmission channel 103).
  • the access network device sends the multicast data to multiple terminals through different unicast sessions (for example, the transmission channel 104, the transmission channel 105, and the transmission channel 106).
  • Sending multicast data to multiple terminals by a network-side device in a shared transmission mode may mean that after the user plane network element obtains the multicast data, it sends the multicast data to an access network device in a shared transmission mode, and the access network device receives the multicast data. After multicasting the data, the multicast data is sent to multiple terminals in a shared transmission mode.
  • the network-side device may send multicast data to multiple terminals in a shared transmission mode, as shown in FIG. 1B .
  • the user plane network element after acquiring the multicast data, the user plane network element sends the multicast data to the access network device through the transmission channel 107 .
  • the access network device After receiving the multicast data, the access network device sends the multicast data to the terminal 1, the terminal 2 and the terminal 3 through the transmission channel 108.
  • the shared transmission mode multicast data is transmitted from the user plane network element to the terminal through a common transmission channel (ie, shared transmission channel, such as transmission channel 107 or transmission channel 108). That is, multiple terminals can share the transmission channel. Therefore, the shared transmission mode can save network resources and improve the utilization rate of network resources.
  • the shared transmission mode is more complicated to implement and has higher requirements on the network side equipment.
  • the network-side equipment sending multicast data to multiple terminals in a shared transmission mode can also be understood as: DN sends multicast data to the multicast user plane network element, and the multicast data may be one copy or multiple copies. .
  • the multicast user plane network element After receiving the multicast data, the multicast user plane network element sends the multicast data to the access network device through the multicast session (for example, the transmission channel 107).
  • the access network device After receiving the multicast data, sends the multicast data to multiple terminals through a multicast session (eg, the transmission channel 108).
  • the transmission mode of multicast data between network side devices is the same as that of multicast data on the air interface (for example, between access network devices and terminals). ) in the same transmission mode.
  • the transmission mode of multicast data between network-side devices is different from the transmission mode of multicast data on the air interface; or, on the air interface, the multicast group of the multicast service
  • the transmission modes corresponding to different terminals are different. That is to say, the network-side device can send multicast data to multiple terminals in a mixed transmission mode, which can improve the flexibility of multicast data transmission. It can be understood that the mixed transmission mode includes many situations.
  • the network-side equipment sends multicast data to multiple terminals in the mixed transmission mode. It may mean that after the user plane network element obtains the multicast data, it sends the multicast data to the access network equipment in the shared transmission mode. After receiving the multicast data, the multicast data is sent to multiple terminals in a separate transmission mode.
  • the network-side device can send multicast data to multiple terminals in a mixed transmission mode, as shown in FIG. 1C , after the user plane network element obtains the multicast data, it sends the multicast data to the access network device through the transmission channel 109 data. After receiving the multicast data, the access network device sends the multicast data to the terminal 1, the terminal 2 and the terminal 3 through the transmission channel 110, the transmission channel 111 and the transmission channel 112, respectively.
  • the multicast data sent by the user plane network element to the access network device through the transmission channel 109 may be one copy or multiple copies. If the number of multicast data sent by the user plane network element to the access network device through the transmission channel 109 is one copy, after the access network device receives the multicast data, it can copy the multicast data multiple times, and pass the transmission channel 110, Transmission channel 111 and transmission channel 112 send multicast data to Terminal 1, Terminal 2, and Terminal 3, respectively.
  • the multicast data sent by the user plane network element to the access network device through the transmission channel 109 is multiple, for example, three copies, after the access network device receives the multicast data, it does not need to copy the multicast data, it can transmit the multicast data
  • the channel 110, the transmission channel 111 and the transmission channel 112 send multicast data to the terminal 1, the terminal 2 and the terminal 3, respectively.
  • the network-side equipment sends multicast data to multiple terminals in a mixed transmission mode. It may mean that after the user plane network element obtains the multicast data, it uses the shared transmission mode to send the multicast data to the access network equipment. After receiving the multicast data, the multicast data is sent to a part of the terminals in a separate transmission mode, and the multicast data is sent to another part of the terminals in a shared transmission mode.
  • the user plane network element after acquiring the multicast data, the user plane network element sends the multicast data to the access network device through the transmission channel 113 .
  • the access network device After receiving the multicast data, the access network device sends the multicast data to the terminal 1 through the transmission channel 114 , and sends the multicast data to the terminal 2 and the terminal 3 through the transmission channel 115 .
  • the multicast data sent by the user plane network element to the access network device through the transmission channel 113 may be one copy or multiple copies. If the number of multicast data sent by the user plane network element to the access network device through the transmission channel 113 is one copy, after the access network device receives the multicast data, it can copy the multicast data multiple times, and send the multicast data to the access network device through the transmission channel 114.
  • Terminal 1 sends multicast data, and sends multicast data to Terminal 2 and Terminal 3 through the transmission channel 115 .
  • the user plane network element sends multiple copies of the multicast data to the access network device through the transmission channel 113, for example, two copies, after the access network device receives the multicast data, it does not need to copy the multicast data, it can transmit the multicast data through the transmission channel 113.
  • the channel 114 sends the multicast data to the terminal 1, and sends the multicast data to the terminal 2 and the terminal 3 through the transmission channel 115.
  • the transmission channel may be alternatively described as a transmission logical channel, a logical channel, a communication connection, or a transmission path.
  • the transmission channel between network-side devices, for example, the transmission channel 101 may also be described as a session, a transmission tunnel, or the like instead.
  • the transmission channel on the air interface, such as the transmission channel 104 may also be described as a channel or the like instead.
  • the multicast described in the embodiments of this application may be replaced by terms such as broadcast (broadcast), multicast (multicast), and multicast/broadcast.
  • an embodiment of the present application provides a communication method.
  • an access network device or a mobility management network element can determine the transmission mode of the multicast service of the terminal, and indicate the transmission mode to the session management network element. mode, so that the session management network element allocates resources for transmitting multicast data to the terminal according to the transmission mode, which can improve the flexibility of communication while realizing multicast data transmission.
  • the communication method provided by the embodiment of the present application can be applied to the communication system shown in FIG. 2A .
  • the communication system may include multiple terminals, mobility management network elements, session management network elements, access network equipment, and user plane network elements.
  • the communication system shown in FIG. 2A may further include a DN, and the DN may include an application server (application server, AS).
  • application server application server
  • the terminal may be a device for implementing wireless communication functions, such as a terminal or a chip that can be used in the terminal.
  • the terminal may be a user equipment (user equipment, UE), access terminal, terminal unit, terminal station, mobile station, mobile station, remote station, remote terminal, mobile device, wireless communication device, terminal agent or terminal device, etc.
  • the access terminal may be a cellular telephone, a cordless telephone, a session initiation protocol (SIP) telephone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices or wearable devices, virtual reality (VR) end devices, augmented reality (AR) end devices, industrial control (industrial) wireless terminal in control), wireless terminal in self-driving, wireless terminal in remote medical, wireless terminal in smart grid, wireless terminal in transportation safety Terminals, wireless terminals in smart cities, wireless terminals in smart homes, etc. Terminals can be mobile or stationary.
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • a wireless communication Functional handheld devices computing devices or other processing devices connected to wireless modems, in-vehicle devices or wearable devices, virtual reality (VR) end devices, augmented reality (AR) end devices, industrial control (industrial) wireless terminal in control), wireless terminal in self-driving,
  • Access network equipment is mainly used to implement functions such as physical layer functions, resource scheduling and management, terminal access control, and mobility management.
  • the access network device may be a device supporting wired access or a device supporting wireless access.
  • the access network device may be an access network (access network, AN)/radio access network (radio access network, RAN), which is composed of multiple 5G-AN/5G-RAN nodes.
  • 5G-AN/5G-RAN nodes can be: access point (AP), base station (nodeB, NB), enhanced base station (enhance nodeB, eNB), next-generation base station (NR nodeB, gNB), transmission and reception A transmission reception point (TRP), a transmission point (TP), or some other access node, etc.
  • Mobility management network element mainly responsible for terminal access authentication, mobility management, signaling interaction between various functional network elements, such as: user registration status, user connection status, user registration and access to the network, tracking area Update, cell handover user authentication and key security are managed.
  • the session management network element is mainly used to realize the user plane transmission channel, such as the establishment, release and modification of the protocol data unit (protocol data unit, PDU) session and other session management functions. Further, the session management network element may be a unicast session management network element or a multicast session management network element.
  • the unicast session management network element can be used to implement a unicast user plane transmission channel, and the unicast user plane transmission channel can be used to transmit unicast data.
  • the multicast session management network element can be used to implement a multicast user plane transmission channel, and the multicast user plane transmission channel can be used to transmit multicast data.
  • the unicast session management network element and the multicast session management network element may be deployed in one device or network element, or may be deployed in different devices or network elements.
  • the user plane network element can be used as the anchor point on the user plane transmission channel to complete functions such as routing and forwarding of user plane data, such as: establishing a channel with the terminal (that is, the user plane transmission channel), and forwarding the terminal on this channel. It is responsible for the data packet filtering, data forwarding, rate control, and generation of charging information for the terminal.
  • the user plane network element may be a unicast user plane network element or a multicast user plane network element.
  • the unicast user plane network element can be used as an anchor point on the unicast user plane transmission channel to complete functions such as routing and forwarding of unicast user plane data.
  • the multicast user plane network element can be used as the anchor point on the multicast user plane transmission channel to complete functions such as routing and forwarding of the multicast user plane data.
  • Unicast user plane network elements and multicast user plane network elements may be deployed in one device or network element, or may be deployed in different devices or network elements.
  • an operator network that can provide users with data transmission services, such as an operator network that can provide users with Internet Protocol (Internet Protocol, IP) multimedia services (IP multi-media service, IMS).
  • IP Internet Protocol
  • IMS IP multi-media service
  • FIG. 2A is only an exemplary architecture diagram, in addition to the functional units shown in FIG. 2A, the system may also include other functional network elements, such as: policy control network elements, unified data management (unified data management, UDM) ) network element, a unified data repository (unified data repository, UDR) network element, etc., which are not limited in this embodiment of the present application.
  • the policy control network element may be responsible for providing policies to the mobility management network element or the session management network element, for example, a quality of service (quality of service, QoS) policy, a slice selection policy, and the like.
  • the UDM network element may be responsible for the management of user identification, subscription data, authentication data, and registration management of the user's service network element.
  • the UDR network element is used for UDM to store subscription data or read subscription data and PCF to store policy data or read policy data.
  • each device in FIG. 2A is not limited. In addition to the name shown in FIG. 2A, each device can also be named with other names, such as replacing it with the name of a network element with the same or similar functions. .
  • the terminal can report its own capabilities to the network side device, such as the wireless capability of the terminal (for example, UE radio capability), the core network capability of the terminal (for example, UE MM core network capability), etc., In order for the network side equipment to allocate appropriate resources to the terminal, it can provide better services.
  • the terminal may also request the network side device to join the multicast group of the multicast service, so that the network side device allocates resources of the multicast service to the terminal.
  • the first terminal as an example, the following describes the process of reporting wireless capabilities of the terminal, the process of reporting core network capabilities of the terminal, and the process of requesting to join a multicast group by the terminal.
  • the first terminal may be any terminal in the multicast group, for example, terminal 1, terminal 2 or terminal n.
  • the first terminal sends a first request to the mobility management network element.
  • the mobility management network element receives the first request from the first terminal.
  • the first request may be a registration request (registration request) message, which is used for requesting to be registered in the network.
  • registration request registration request
  • the first terminal sends the first request to the mobility management network element under the condition of initially registering with the network.
  • the mobility management network element sends a second request to the access network device.
  • the access network device receives the second request from the mobility management network element.
  • the second request may be included in the N2 message to indicate that the mobility management network element does not store the wireless capability information of the first terminal.
  • the second request may be included in an initial context setup message.
  • the wireless capability information of the first terminal may be used to indicate the wireless capability of the first terminal, for example, a frequency spectrum supported by the first terminal, or a power consumption level of the first terminal, and the like.
  • the mobility management network element sends the second request to the access network device.
  • step S12 is replaced with: if the mobility management network element stores the wireless capability information of the first terminal, the mobility management network element sends the wireless capability information of the first terminal to the access network device.
  • the access network device requests the first terminal for the wireless capability of the first terminal.
  • the access network device sends a request message for requesting the radio capability of the first terminal, and the request message may be included in a radio resource control (radio resource control, RRC) message.
  • RRC radio resource control
  • the access network device requests the first terminal for the wireless capability of the first terminal.
  • the access network device sends the wireless capability information of the first terminal to the mobility management network element.
  • S14 The first terminal sends the wireless capability information of the first terminal to the access network device.
  • the access network device receives the wireless capability information from the first terminal.
  • the radio capability information of the first terminal may be included in the RRC message.
  • the access network device may also send the wireless capability information of the first terminal to the mobility management network element.
  • the first terminal sends the core network capability information of the first terminal to the mobility management network element.
  • the mobility management network element receives the core network capability information of the first terminal from the first terminal.
  • the core network capability information of the first terminal may be included in the registration request message.
  • the core network capability information of the first terminal may be used to indicate the type of core network supported by the first terminal.
  • the type of the core network may be an evolved packet core (evolved packet core) network or a 5G core network.
  • the first terminal sends the core network capability information of the first terminal to the mobility management network element in the case of initially registering with the network.
  • the mobility management network element sends the core network capability information of the first terminal to the access network device.
  • the access network device receives the core network capability information of the first terminal from the mobility management network element.
  • the core network capability information of the first terminal may be included in the N2 message.
  • the core network capability information of the first terminal is included in an initial context setup message (initial context setup message).
  • S31 The first terminal sends a third request to the session management network element.
  • the session management network element receives the third request from the first terminal.
  • the third request may be used for requesting to join the multicast group of the multicast service.
  • the first terminal sends the third request to the session management network element through the mobility management network element.
  • the first terminal first sends the third request to the mobility management network element, and after receiving the third request, the mobility management network element sends the third request to the session management network element.
  • the third request may include identification information of the multicast group.
  • the identification information of the multicast group may include the identification of the multicast group, the identification of the multicast session, or the protocol address related to the multicast service.
  • the identifier of the multicast group may be used to identify the multicast group.
  • the identifier of the multicast group may be a temporary identifier allocated by the AS or the 5G core network for the multicast group, for example, a temporary multicast group identifier (temporary multicast group identifier, TMGI).
  • the multicast group may also be replaced by a multicast session.
  • Multicast sessions are used to transmit multicast data.
  • the identification of the multicast session may be used to indicate the multicast session.
  • the protocol address related to the multicast service may be an IP address, for example, the IP address of the multicast data, or the IP address of the user plane network element connected to the AS.
  • the identification information of the multicast group may further include the port number of the user plane network element connected to the AS.
  • the third request is included in a non-access stratum (non access stratum, NAS) message or a join request message on the user plane.
  • the NAS message may be a PDU session modification request, a PDU session establishment request, or the like.
  • the join request message of the user plane may be an Internet group management protocol (internet group management protocol, IGMP) join message (IGMP join message).
  • IGMP Internet group management protocol
  • the application of the first terminal triggers the first terminal to send a third request to the session management network element;
  • the network element sends the third request.
  • S32 The session management network element sends the multicast information of the multicast group to the access network device.
  • the access network device receives the multicast information of the multicast group from the session management network element.
  • the session management network element sends the multicast information of the multicast group to the access network device through the mobility management network element.
  • the multicast information of the multicast group may be used to describe the requirements of the multicast service for the multicast group.
  • the network-side device may allocate resources to the multicast group according to the multicast information of the multicast group, for example, the above-mentioned transmission channel 107 or transmission channel 108 .
  • the multicast information of the multicast group may include QoS parameter information of the multicast group.
  • the QoS parameter information of the multicast group may include at least one of the following information: the requirement for the packet loss rate of the multicast group, the requirement for the delay of the multicast group, the allocation and preemption priority of the multicast group level information (allocation and retention priority, ARP), the maximum transmission bit rate (maximum flow bit rate, MFBR) of the multicast group, or 5G QoS identifier (5G QoS identifier, 5QI) information.
  • the 5QI information is used to identify the QoS parameter information of the multicast group.
  • the multicast information of the multicast group may further include identification information of the multicast group.
  • the identification information of the multicast group may include the identification of the multicast group, the identification of the multicast session, or the protocol address related to the multicast service.
  • the identifier or address included in the identification information of the multicast group in S32 may be the same or different from the identifier or address included in the identification information of the multicast group in S31. That is to say, after receiving the third request, the session management network element can re-allocate the identifier to the multicast group, or re-allocate the identifier to the multicast session, or re-allocate the protocol address to the multicast data.
  • the multicast information of the multicast group is obtained by the session management network element according to the identifier of the multicast group.
  • the identifier of the multicast group has a corresponding relationship with the multicast information of the multicast group.
  • the session management network element can obtain the multicast group according to the identifier of the multicast group and the above-mentioned corresponding relationship. Multicast information for the group.
  • the session management network element obtains the multicast information of the multicast group locally. If the session management network element does not store the multicast information of the multicast group, the session management network element can obtain the multicast information of the multicast group from the first network element, and the first network element can be used to manage the multicast group Group multicast information.
  • the first network element may have the following two cases: In the first case, if the third request is received by a unicast session management network element, the first network element may be a multicast session management network element or a UDR . In the second case, if the multicast session management network element receives the third request, the first network element may be a UDR network element, a UDM network element or a policy control network element.
  • the session management network element sends the multicast information of the first terminal to the access network device. Further, when the transmission mode of the multicast service of the first terminal is an independent transmission mode, a shared transmission mode or a mixed transmission mode, the session management network element sends the multicast information of the first terminal to the access network device.
  • the multicast information of the first terminal may be used to describe the requirements of the multicast service for the first terminal.
  • the network-side device may allocate resources to the first terminal according to the multicast information of the first terminal, for example, the above-mentioned transmission channel 101 or transmission channel 104, etc.
  • the multicast information of the first terminal may include QoS parameter information of the first terminal.
  • the QoS parameter information of the first terminal may indicate at least one of the following information: a requirement for the packet loss rate of the first terminal, a requirement for the delay of the first terminal, the ARP of the first terminal, the MFBR of the first terminal, or the 5QI information of the first terminal.
  • the 5QI information of the first terminal is used to identify the QoS parameter information of the first terminal.
  • the multicast information of the first terminal may be determined according to the multicast information of the multicast group. For example, after acquiring the multicast information of the multicast group, the session management network element determines the multicast information of the terminal for the terminal in the multicast group according to the multicast information of the multicast group, so that the terminal uses the single transmission In the process of communicating with the network side device in the mode, the network side device may allocate resources to the terminal according to the multicast information of the terminal. It can be understood that the multicast information of the first terminal and the multicast information of the multicast group may be sent at the same time, or may not be sent at the same time.
  • the communication system shown in FIG. 2A may be a 3GPP communication system, such as a fourth generation (4th generation, 4G) communication system, a long term evolution (long term evolution, LTE) system, or a 5G communication system or a new air interface ( new radio, NR) system, next-generation communication system, etc., may also be non-3GPP communication systems, without limitation.
  • 4G fourth generation
  • LTE long term evolution
  • NR new air interface
  • next-generation communication system etc.
  • non-3GPP communication systems without limitation.
  • the network element or entity corresponding to the above-mentioned session management network element may be a session management function (session management function) in the 5G communication system.
  • management function, SMF the network element or entity corresponding to the above-mentioned user plane network element may be a user plane function (UPF) in the 5G communication system
  • the network element or entity corresponding to the access network equipment may be 5G communication
  • the radio access network (RAN) and the network element or entity corresponding to the mobility management network element in the system may be the access and mobility management function (AMF) in the 5G communication system.
  • the 5G communication system shown in FIG. 2B further includes: a policy control function (PCF), UDM, UDR, etc., which are not limited in this embodiment of the present application.
  • PCF policy control function
  • UDM may correspond to the UDM network element in FIG. 2A .
  • UDR may correspond to the UDR network element in FIG. 2A .
  • the access network equipment, the terminal, the session management network element, and the mobility management network element in the embodiment of the present application may also be referred to as a communication device, which may be a general-purpose device or a special-purpose device. This is not specifically limited.
  • the related functions of the access network device, the terminal, the session management network element, and the mobility management network element in the embodiments of the present application may be implemented by one device, or jointly implemented by multiple devices, or may be implemented by one device. It is implemented by one or more functional modules in the device, which is not specifically limited in this embodiment of the present application. It is to be understood that the above-mentioned functions may be either network elements in hardware devices, or software functions running on dedicated hardware, or a combination of hardware and software, or virtualization instantiated on a platform (eg, a cloud platform) Function.
  • a platform eg, a cloud platform
  • each device or network element shown in FIG. 2A may adopt the composition structure shown in FIG. 3 , or include FIG. 3 parts shown.
  • FIG. 3 is a schematic diagram of a hardware structure of a communication device applicable to an embodiment of the present application.
  • the communication apparatus 30 includes at least one processor 301 and at least one communication interface 304, and is used for implementing the method provided by the embodiment of the present application.
  • the communication device 30 may also include a communication line 302 and a memory 303 .
  • the processor 301 can be a general-purpose central processing unit (central processing unit, CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more processors for controlling the execution of the programs of the present application. integrated circuit.
  • CPU central processing unit
  • ASIC application-specific integrated circuit
  • Communication line 302 may include a path, such as a bus, to transfer information between the components described above.
  • the communication interface 304 can be any device such as a transceiver, such as an Ethernet interface, a radio access network (RAN) interface, a wireless local area network (WLAN) interface, a transceiver, a pin , bus, or transceiver circuit, etc.
  • RAN radio access network
  • WLAN wireless local area network
  • Memory 303 may be read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory (RAM) or other types of information and instructions It can also be an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disk storage, CD-ROM storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or capable of carrying or storing desired program code in the form of instructions or data structures and capable of being executed by a computer Access any other medium without limitation.
  • the memory may exist independently and be coupled to the processor 301 through the communication line 302 .
  • the memory 303 may also be integrated with the processor 301 .
  • the memory provided by the embodiments of the present application may generally be non-volatile.
  • the memory 303 is used for storing computer-executed instructions involved in executing the solutions provided by the embodiments of the present application, and the execution is controlled by the processor 301 .
  • the processor 301 is configured to execute the computer-executed instructions stored in the memory 303, so as to implement the method provided by the embodiments of the present application.
  • the computer-executed instructions in the embodiments of the present application may also be referred to as application program codes, which are not specifically limited in the embodiments of the present application.
  • the coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units or modules, which may be in electrical, mechanical or other forms, and is used for information exchange between devices, units or modules.
  • the processor 301 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 3 .
  • the communication apparatus 30 may include multiple processors, such as the processor 301 and the processor 307 in FIG. 3 .
  • processors can be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor.
  • a processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (eg, computer program instructions).
  • the communication apparatus 30 may further include an output device 305 and/or an input device 306 .
  • Output device 305 is coupled to processor 301 and can display information in a variety of ways.
  • the output device 305 may be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector (projector) Wait.
  • Input device 306 is coupled to processor 301 and can receive user input in a variety of ways.
  • the input device 306 may be a mouse, a keyboard, a touch screen device, a sensor device, or the like.
  • composition shown in FIG. 3 does not constitute a limitation on the communication device, and in addition to the components shown in FIG. some components, or a different arrangement of components.
  • the communication method provided by the embodiment of the present application is described below by taking the architecture shown in FIG. 2A as an example.
  • Each network element in the following embodiments may have the components shown in FIG. 3 , which will not be repeated.
  • words such as “first” and “second” may be used to distinguish technical features with the same or similar functions.
  • the words “first”, “second” and the like do not limit the quantity and execution order, and the words “first”, “second” and the like do not limit the difference.
  • words such as “exemplary” or “for example” are used to represent examples, illustrations or illustrations, and any embodiment or design solution described as “exemplary” or “for example” should not be construed are preferred or advantageous over other embodiments or designs.
  • the use of words such as “exemplary” or “such as” is intended to present the relevant concepts in a specific manner to facilitate understanding.
  • an access network device may perform some or all of the steps in the embodiments of the present application. These steps are only examples, and the embodiments of the present application Other steps or variations of the various steps may also be performed. In addition, various steps may be performed in different orders presented in the embodiments of the present application, and it may not be necessary to perform all the steps in the embodiments of the present application.
  • the specific structure of the execution body of the communication method is not particularly limited in the embodiments of the present application, as long as the methods provided by the embodiments of the present application can be implemented.
  • the execution subject of the communication method provided by the embodiment of the present application may be an access network device, or a component applied in the access network device, such as a chip, which is not limited in this application.
  • the execution subject of the communication method provided in the embodiment of the present application may be a terminal, or a component applied in the terminal, such as a chip, which is not limited in this application.
  • the execution subject of the communication method provided by the embodiment of the present application may be a session management network element, or a component applied to the session management network element, such as a chip, which is not limited in this application.
  • the execution subject of the communication method provided in the embodiment of the present application may be a mobility management network element, or a component applied in the mobility management network element, such as a chip, which is not limited in this application.
  • the following embodiments are described by taking the execution subjects of the communication method as an example of an access network device, a terminal, a session management network element, and a mobility management network element.
  • a communication method provided by an embodiment of the present application includes S401-S403.
  • the network side device determines the transmission mode of the multicast service of the first terminal.
  • the network side device may be an access network device or a mobility management network element, which is not limited.
  • the network side device may be the access network device or the mobility management network element in FIG. 2A .
  • the first terminal may be any terminal in FIG. 2A, such as terminal 1, terminal 2 or terminal n.
  • the transmission mode of the multicast service of the first terminal may be an independent transmission mode, a shared transmission mode, or a mixed transmission mode.
  • the individual transmission mode, the shared transmission mode and the mixed transmission mode reference may be made to the foregoing.
  • the network side device determines the transmission mode of the multicast service of the first terminal according to one or more of the following information: the multicast/broadcast service (multicast/broadcast service, MBS) capability of the access network device, MBS capability information of the first terminal, service requirements of the multicast service, or the number of terminals that have joined the multicast service.
  • MBS multicast/broadcast service
  • the MBS capability of the access network device may represent whether the access network device supports the shared transmission mode.
  • the MBS capability information of the first terminal may represent whether the first terminal supports the shared transmission mode.
  • the service requirements of the multicast service may include whether the multicast service supports or does not support multicast transmission. For example, if the multicast service is a video service, the multicast service supports multicast transmission, and if the multicast service is a chat service, the multicast service does not support multicast transmission.
  • the terminal that has joined the multicast service may refer to the terminal that has requested to join the multicast group, and the core network equipment, such as the session management network element, accepts the request, or that the terminal that has joined the multicast service may refer to the
  • the terminal capable of receiving multicast data may specifically include the first terminal, or may not include the first terminal, which is not limited.
  • the following six methods are used as examples to describe the process of the network side device determining the transmission mode of the multicast service of the first terminal.
  • Manner 1 The network side device determines the transmission mode of the multicast service of the first terminal according to the MBS capability of the access network device.
  • the network side device determines that the transmission mode is the shared transmission mode; or, if the MBS capability of the access network device is the access network device. If the network device does not support the shared transmission mode, the network side device determines that the transmission mode is the individual transmission mode.
  • the access network device may determine that the transmission mode is the individual transmission mode. If the access network device supports the shared transmission mode, the access network device can receive multicast data sent to each terminal through a common transmission channel, and send multicast data to each terminal through the common transmission channel. In this case, the network-side device may determine that the transmission mode is the shared transmission mode. It should be understood that, if the access network device supports the shared transmission mode, the network-side device may also determine that the transmission mode is a hybrid transmission mode or an independent transmission mode. For example, the transmission mode may be the hybrid transmission mode shown in Case 1 or Case 2 above.
  • the network side device determines the transmission mode of the multicast service of the first terminal according to the MBS capability of the access network device and the MBS capability information of the first terminal.
  • the network side device determines that the transmission mode is: Shared transmission mode; or, if the MBS capability of the access network device is that the access network device does not support the shared transmission mode, or the MBS capability information of the first terminal indicates that the first terminal does not support the shared transmission mode, the network side device determines the transmission mode for single transmission mode. Mode 2 will be specifically described below through four situations.
  • Case 2.1 The MBS capability of the access network device is that the access network device supports the shared transmission mode, and the MBS capability information of the first terminal indicates that the first terminal supports the shared transmission mode.
  • the access network device can receive multicast data sent to multiple terminals through a common transmission channel, or can use a common transmission channel to receive multicast data sent to multiple terminals.
  • the channel sends multicast data to multiple terminals, and the first terminal can receive the multicast data from the access network device through a common transmission channel.
  • the network-side device may determine that the transmission mode is the shared transmission mode. It should be understood that in this case, the network-side device may also determine that the transmission mode is a mixed transmission mode or a separate transmission mode.
  • the transmission mode may be the hybrid transmission mode shown in Case 1 or Case 2 above.
  • Case 2.2 The MBS capability of the access network device is that the access network device does not support the shared transmission mode, and the MBS capability information of the first terminal indicates that the first terminal does not support the shared transmission mode.
  • the access network device cannot receive multicast data sent to multiple terminals through a common transmission channel, nor can it receive multicast data sent to multiple terminals through a common transmission channel.
  • the first terminal cannot receive the multicast data from the access network device through the common transmission channel.
  • the network-side device may determine that the transmission mode is the individual transmission mode.
  • Case 2.3 The MBS capability of the access network device is that the access network device does not support the shared transmission mode, and the MBS capability information of the first terminal indicates that the first terminal supports the shared transmission mode.
  • the access network device does not support the shared transmission mode and the first terminal supports the shared transmission mode, the first terminal can receive multicast data from the access network device through the common transmission channel, but the access network device cannot. Multicast data sent to multiple terminals is received through a common transmission channel, and multicast data cannot be sent to multiple terminals through a common transmission channel.
  • the network-side device may determine that the transmission mode is the individual transmission mode.
  • Case 2.4 The MBS capability of the access network device is that the access network device supports the shared transmission mode, and the MBS capability information of the first terminal indicates that the first terminal does not support the shared transmission mode.
  • the access network device may receive multicast data sent to multiple terminals through a common transmission channel, or may use a common transmission channel.
  • the transmission channel sends multicast data to multiple terminals, but the first terminal cannot receive the multicast data from the access network device through the common transmission channel.
  • the network-side device may determine that the transmission mode is the individual transmission mode. It should be understood that in this case, the network-side device may also determine that the transmission mode is a mixed transmission mode.
  • the transmission mode may be the hybrid transmission mode shown in Case 1 above.
  • Mode 3 The network side device determines the transmission mode of the multicast service of the first terminal according to the MBS capability of the access network device, the MBS capability information of the first terminal, and the number of terminals that have joined the multicast service.
  • the network side device may determine that the transmission mode is Separate transfer mode. If the MBS capability of the access network device is that the access network device supports the shared transmission mode, and the MBS capability information of the first terminal indicates that the first terminal supports the shared transmission mode, the network side device can further determine the number of terminals that have joined the multicast service according to the number of Determine the transfer mode.
  • the network side device determines that the transmission mode is the shared transmission mode. That is to say, in the case that both the access network device and the first terminal support the shared transmission mode, if the number of terminals joining the multicast service is large, the network side device can determine that the transmission mode is the shared transmission mode, which can save network resources and improve the utilization of network resources.
  • the MBS capability information of the first terminal represents the number of terminals that the first terminal supports the shared transmission mode and has joined the multicast service If the value is less than the first threshold, the network-side device determines that the transmission mode is the individual transmission mode. That is to say, in the case that both the access network device and the first terminal support the shared transmission mode, if the number of terminals joining the multicast service is small, the network side device can determine that the transmission mode is the individual transmission mode, which can reduce the number of The complexity of network side equipment (eg, session management network element, access network equipment, etc.) can also improve the success rate of the first terminal in receiving multicast data.
  • the complexity of network side equipment eg, session management network element, access network equipment, etc.
  • the network side device determines the transmission mode of the multicast service of the first terminal according to the MBS capability of the access network device and the service requirement of the multicast service.
  • the network side device may determine that the transmission mode is the individual transmission mode. If the MBS capability of the access network device is that the access network device supports the shared transmission mode, the network side device may further determine the transmission mode according to the service requirements of the multicast service.
  • the network side device determines that the transmission mode is shared. transfer mode. If the MBS capability of the access network device is that the access network device supports the shared transmission mode, and the service requirements of the multicast service include that the multicast service does not support multicast transmission, the network side device determines that the transmission mode is the individual transmission mode.
  • Manner 5 The network side device determines the transmission mode of the multicast service of the first terminal according to the MBS capability of the access network device and the number of terminals that have joined the multicast service.
  • the network side device may determine that the transmission mode is the individual transmission mode. If the MBS capability of the access network device is that the access network device supports the shared transmission mode, the network side device may further determine the transmission mode according to the number of terminals that have joined the multicast service.
  • the network side device determines that the transmission mode is Shared transfer mode. If the MBS capability of the access network device is that the access network device supports the shared transmission mode, and the number of terminals that have joined the multicast service is less than the first threshold, the network side device determines that the transmission mode is the individual transmission mode.
  • the network side device determines the transmission mode of the multicast service of the first terminal according to the MBS capability of the access network device, the MBS capability information of the first terminal, and the service requirement of the multicast service.
  • the network side device may determine that the transmission mode is Separate transfer mode. If the MBS capability of the access network device is that the access network device supports the shared transmission mode, and the MBS capability information of the first terminal indicates that the first terminal supports the shared transmission mode, the network-side device may further determine the transmission mode according to the service requirements of the multicast service .
  • the MBS capability of the access network device is that the access network device supports the shared transmission mode
  • the MBS capability information of the first terminal indicates that the first terminal supports the shared transmission mode
  • the service requirements of the multicast service include multiple If the multicast service supports multicast transmission, the network side device determines that the transmission mode is the shared transmission mode. If the MBS capability of the access network device is that the access network device supports the shared transmission mode, the MBS capability information of the first terminal indicates that the first terminal supports the shared transmission mode, and the service requirements of the multicast service include that the multicast service does not support multicast transmission , the network side device determines that the transmission mode is the independent transmission mode.
  • the network side device sends first indication information to the session management network element.
  • the network side device if the network side device is an access network device, the network side device sends the first indication information to the session management network element through the mobility management network element.
  • the network-side device may include the first indication information in the N2 message and send it to the mobility management network element.
  • the mobility management network element After receiving the N2 message, the mobility management network element may include the first indication information in the N11 message and send it to the session management network Yuan. If the network-side device is a mobility management network element, the network-side device may send an N11 message to the session management network element, where the N11 message includes the first indication information.
  • the session management network element may be the session management network element shown in FIG. 2A .
  • the session management network element may be a multicast session management network element corresponding to managing the multicast service of the first terminal, or may be a session management network element (ie, a unicast session) that manages a PDU session (such as a unicast session) of the first terminal. management network element).
  • the first indication information may be used to indicate the transmission mode of the multicast service or the transmission mode determined by the network side device.
  • the first indication information may be a message, or may be a cell or a bit contained in the message, which is not limited.
  • the network-side device may send the first indication information to the unicast session management network element, or may send the first indication information to the multicast session management network element.
  • the network side device sends the first indication information to the unicast session management network element, so that the unicast session management network element allocates resources to the first terminal.
  • the network side device sends the first indication information to the multicast session management network element, so that the multicast session management network element allocates resources to the first terminal.
  • the network side device may also send the first indication information to the unicast session management network element, so that the unicast session management network element determines that it is not necessary to allocate resources for the first terminal.
  • the network side device sends the first indication information to the multicast session management network element and the unicast session management network element, so that the unicast session management network element or the multicast session management network element sends the first indication information.
  • the session management network element allocates resources to the first terminal.
  • the network side device sends the first indication information to the unicast session management network element.
  • the unicast session management network element After receiving the first indication information, the unicast session management network element sends second indication information to the multicast session management network element, and the second indication information is used to indicate that the transmission mode is the shared transmission mode, so that the multicast session management network element is the first indication information.
  • a terminal allocates resources.
  • the network side device sends the first indication information to the multicast session management network element.
  • the multicast session management network element sends third indication information to the unicast session management network element. The third indication information is used to indicate that the transmission mode is the independent transmission mode, so that the unicast session management network element is the first A terminal allocates resources.
  • the network side device can indicate the transmission mode of the multicast service to the session management network element in various ways.
  • the following three methods are used as examples to introduce.
  • the first indication information is the indication information of the transmission mode.
  • the size of the first indication information is 1 bit. If the value of the first indication information is "0", the first indication information indicates that the transmission mode of the multicast service is the independent transmission mode. If the value of the first indication information is "1", the first indication information indicates that the transmission mode of the multicast service is the shared transmission mode, and vice versa.
  • the size of the first indication information is 2 bits. If the value of the first indication information is "00", the first indication information indicates that the transmission mode of the multicast service is the independent transmission mode. If the value of the first indication information is "01”, the first indication information indicates that the transmission mode of the multicast service is the shared transmission mode. If the value of the first indication information is "10", the first indication information indicates that the transmission mode of the multicast service is the hybrid transmission mode.
  • the first indication information included in the message 1 indicates the transmission of the multicast service.
  • the mode is the single transmission mode.
  • the type of the message 1 is a message type corresponding to the shared transmission mode, for example, the message 1 is a message indicating establishment of a shared transmission channel
  • the first indication information indicates that the transmission mode of the multicast service is the shared transmission mode.
  • the transmission modes are the individual transmission mode and the shared transmission mode and the mixed transmission mode
  • the message types of the messages including the first indication information are different.
  • the first indication information included in the message 2 indicates that the transmission mode of the multicast service is the individual transmission mode. If the type of the message 2 is the message type corresponding to the shared transmission mode, the first indication information indicates that the transmission mode of the multicast service is the shared transmission mode. If the type of the message 2 is the message type corresponding to the hybrid transmission mode, the first indication information indicates that the transmission mode of the multicast service is the hybrid transmission mode.
  • the first indication information includes information used in the shared transmission mode, for example, the first indication information includes at least one of the following information: The protocol address, the identifier of the shared transport channel, the identifier of the multicast group, the identifier of the multicast session, or the identifier of the QoS flow of the multicast session.
  • the transmission mode is the individual transmission mode
  • the first indication information includes information used in the individual transmission mode. For example, the first indication information does not include the above-mentioned information used in the shared transmission mode, or the first indication information includes individual transmission. ID of the channel.
  • the transmission modes are the individual transmission mode and the shared transmission mode and the mixed transmission mode, the contents included in the first indication information are different.
  • the first indication information includes information used in the shared transmission mode, for example, the first indication information includes at least one of the following information: The protocol address, the identifier of the shared transmission channel, the identifier of the multicast group, the identifier of the multicast session or the identifier of the QoS flow of the multicast session.
  • the transmission mode is the individual transmission mode
  • the first indication information includes the information used in the individual transmission mode, for example, the first indication information includes the identifier of the individual transmission channel, or the first indication information does not include the above-mentioned use in the shared transmission mode Information.
  • the transmission mode is the hybrid transmission mode
  • the first indication information includes information used in the individual transmission mode and information used in the shared transmission mode, for example, the first indication information includes the identifier of the individual transmission channel and the identifier of the shared transmission channel.
  • the session management network element receives the first indication information from the network side device.
  • the session management network element determines the transmission mode of the multicast service of the first terminal according to the first indication information.
  • the session management network element determines that the transmission mode of the multicast service is the independent transmission mode. If the value of the first indication information is "1", the session management network element determines that the transmission mode of the multicast service is the shared transmission mode, and vice versa.
  • the session management network element determines that the transmission mode of the multicast service is the independent transmission mode. If the value of the first indication information is "01”, the session management network element determines that the transmission mode of the multicast service is the shared transmission mode. If the value of the first indication information is "10”, the session management network element determines that the transmission mode of the multicast service is the hybrid transmission mode.
  • the session management network element determines that the transmission mode of the multicast service is the individual transmission mode. If the type of message 1 is the message type corresponding to the shared transmission mode, the session management network element determines that the transmission mode of the multicast service is the shared transmission mode.
  • the session management network element determines that the transmission mode of the multicast service is the individual transmission mode. If the type of message 2 is the message type corresponding to the shared transmission mode, the session management network element determines that the transmission mode of the multicast service is the shared transmission mode. If the type of the message 2 is the message type corresponding to the mixed transmission mode, the session management network element determines that the transmission mode of the multicast service is the mixed transmission mode.
  • the session management network element determines that the transmission mode of the multicast service is the shared transmission mode. If the first indication information includes information used in the individual transmission mode, the session management network element determines that the transmission mode of the multicast service is the individual transmission mode.
  • the session management network element determines that the transmission of the multicast service is in the shared transmission mode. If the first indication information includes information used in the individual transmission mode, the session management network element determines that the transmission mode of the multicast service is the individual transmission mode. If the first indication information includes the information used in the shared transmission mode and the information used in the independent transmission mode, the session management network element determines that the transmission mode of the multicast service is the hybrid transmission mode.
  • the session management network element allocates a first resource for transmitting multicast data to the first terminal according to the first indication information.
  • the first resource may include at least one of a transmission channel between core network devices for transmitting multicast data, or a transmission channel between core network devices and an access network device for transmitting multicast data.
  • the first resource includes a transmission channel between a multicast user plane network element and a unicast user plane network element, a transmission channel between a unicast user plane network element and an access network device, and a multicast user plane network element and an access network element. At least one of the transmission channels between networked devices.
  • the multicast data can be sent to the user plane network element.
  • the user plane network element may transmit the multicast data according to the first resource allocated by the session management network element.
  • the user plane network element may be a unicast user plane network element or a multicast user plane network element. If the user plane network element is a unicast user plane network element, after receiving the multicast data, the unicast user plane network element sends the multicast data to the multicast user plane network element.
  • the following describes the process of allocating the first resource by the session management network element when the first indication information indicates the individual transmission mode, the shared transmission mode and the hybrid transmission mode respectively.
  • the first indication information indicates that the transmission mode is the independent transmission mode.
  • the session management network element establishes the first transmission channel.
  • the first transmission channel is used for transmitting multicast data between the multicast user plane network element and the unicast user plane network element, and the first transmission channel is an independent transmission channel or a shared transmission channel.
  • the session management network element may send the information of the first transmission channel to the multicast user plane network element and the unicast user plane network element.
  • the information of the first transmission channel may include an identification of the first transmission channel.
  • the identifier of the first transmission channel may be the identifier of the user plane general packet radio service (general packet radio service, GPRS) tunneling protocol (GPRS tunnelling protocol for the user plane, GTP-U) or the tunnel endpoint identifier (tunnel endpoint identifier, TEID) .
  • GPRS general packet radio service
  • GTP-U general packet radio service
  • tunnel endpoint identifier tunnel endpoint identifier
  • TEID tunnel endpoint identifier
  • the session management network element may further establish a second transmission channel.
  • the second transmission channel is used to transmit multicast data between the unicast user plane network element and the access network equipment.
  • the second transmission channel is an independent transmission channel.
  • the second transmission channel may be the transmission channel 101 in FIG. 102 or transmission channel 103.
  • the session management network element may send the information of the second transmission channel to the unicast user plane network element and the access network device.
  • the information of the second transmission channel may include an identification of the second transmission channel.
  • the identifier of the second transmission channel may be the identifier of the GTP-U or the TEID.
  • the unicast user plane network element can send the multicast data to the access network device through the second transmission channel.
  • the session management network element has established the second transmission channel before S403, for example, the session management network element has established the second transmission channel for the second terminal through the above S401-S403, the session management network element does not need to A second transmission channel is established.
  • both the first terminal and the second terminal are included in the multicast group, and the second terminal is different from the first terminal.
  • the first terminal is terminal 1 in FIG. 2A
  • the second terminal may be terminal 2 . . . or terminal n in FIG. 2A .
  • the session management network element can send the information of the second transmission channel to the unicast user plane network element and the access network device without establishing the second transmission channel again.
  • the first indication information indicates that the transmission mode is the shared transmission mode.
  • the session management network element establishes the third transmission channel.
  • the third transmission channel is used to transmit multicast data between the multicast user plane network element and the access network device.
  • the third transmission channel is a shared transmission channel.
  • the third transmission channel may be the transmission channel 107 in FIG. 1B .
  • the session management network element sends the information of the third transmission channel to the multicast user plane network element and the access network device.
  • the information of the third transmission channel may include an identifier of the third transmission channel, and/or multicast information of the multicast group.
  • the identifier of the third transmission channel may be the identifier of the GTP-U or the TEID.
  • the multicast user plane network element can send the multicast data to the access network device through the third transmission channel.
  • the first indication information indicates that the transmission mode is a hybrid transmission mode.
  • the session management network element establishes the third transmission channel, or the session management network element establishes the first transmission channel and the second transmission channel, or, The session management network element establishes a first transmission channel, a second transmission channel and a third transmission channel.
  • the network-side device can determine the transmission mode of the multicast service of the first terminal, and indicate the transmission mode to the session management network element, so that the session management network element can allocate the transmission mode for the first terminal to the first terminal.
  • the first resource for multicast data can improve the flexibility of communication while realizing multicast data transmission.
  • the actions of the network-side equipment, the session management network element or the first terminal in the above S401-S403 can be executed by the processor 301 in the communication apparatus 30 shown in FIG. 3 calling the application code stored in the memory 303.
  • the application examples do not impose any limitation on this.
  • the method provided by the embodiment of the present application is described below by taking the network side devices as an access network device and a mobility management network element as an example.
  • the access network device can determine the transmission mode of the multicast service of the first terminal, and indicate the transmission mode to the session management network element. mode, so that the session management network element allocates the first resource for transmitting multicast data to the first terminal according to the transmission mode, which can improve the flexibility of communication while realizing multicast data transmission.
  • the communication method includes S501-S503.
  • the access network device determines the transmission mode of the multicast service of the first terminal.
  • the access network device may be the access network device in FIG. 2A .
  • the first terminal may be any terminal in FIG. 2A, such as terminal 1, terminal 2 or terminal n.
  • the access network device determines the transmission mode of the multicast service of the first terminal in the case of determining the multicast service requirement of the first terminal.
  • the access network device may be triggered to determine the transmission mode of the multicast service of the first terminal through the process of the terminal requesting to join the multicast group.
  • the access network device is triggered to determine the transmission mode of the multicast service of the first terminal by using the methods shown in the above S31-S32. That is, after receiving the multicast information of the multicast group from the session management network element, the access network device determines the transmission mode of the multicast service of the first terminal.
  • the session management network element may be the session management network element shown in FIG. 2A .
  • the session management network element may be a multicast session management network element corresponding to managing the multicast service of the first terminal, and may also be a session management network element (ie, a unicast session) that manages a PDU session (such as a unicast session) of the first terminal. management network element).
  • a session management network element ie, a unicast session
  • PDU session such as a unicast session
  • the access network device determines the transmission mode of the multicast service of the first terminal according to one or more of the following information: MBS capability of the access network device, MBS capability information of the first terminal, multicast service service requirements or the number of terminals that have joined the multicast service.
  • MBS capability of the access network device MBS capability information of the first terminal
  • multicast service service requirements or the number of terminals that have joined the multicast service For this process, reference may be made to the corresponding description in S401 above. It should be noted that, in addition to the corresponding description in the above S401, the access network device may not be able to identify the multicast information such as the MBS capability information of the first terminal and/or the multicast group. In this case, the access network equipment can communicate with the terminal or the user plane network element in a separate transmission mode.
  • the MBS capability information of the first terminal is obtained by the access network device from the first terminal or a mobility management network element.
  • the mobility management network element may be the mobility management network element in FIG. 2A .
  • the access network device may store the information locally.
  • the access network device may acquire the MBS capability information of the first terminal through the wireless capability reporting process of the terminal. For example, the access network device may acquire the MBS capability information of the first terminal through the methods shown in S11-S14 above.
  • the MBS capability information of the first terminal may be included in the wireless capability information of the first terminal (for example, in S14, the first terminal sends the wireless capability information of the first terminal to the access network device, and the first terminal
  • the wireless capability information of the first terminal includes the MBS capability information of the first terminal); or, the MBS capability information of the first terminal is not included in the wireless capability information of the first terminal, but is used as an information element corresponding to the wireless capability information of the first terminal.
  • the information element of the same level is sent to the access network device (for example, the wireless capability information of the first terminal in S11-S14 can be replaced with the wireless capability information of the first terminal and the MBS capability information of the first terminal); or, S11- The wireless capability information of the first terminal in S14 may be replaced with the MBS capability information of the first terminal.
  • the access network device may obtain the MBS capability information of the first terminal through the core network capability reporting process of the terminal. For example, the access network device may acquire the MBS capability information of the first terminal through the methods shown in the foregoing S21-S22.
  • the MBS capability information of the first terminal may be included in the core network capability information of the first terminal (for example, in S22, the mobility management network element sends the core network capability information of the first terminal to the access network device , the core network capability information of the first terminal includes the MBS capability information of the first terminal); or, the MBS capability information of the first terminal is not included in the core network capability information of the first terminal, but serves as the core network capability information of the first terminal.
  • the information element of the same level corresponding to the network capability information is sent to the access network device (for example, the core network capability information of the first terminal in S21-S22 can be replaced with the core network capability information of the first terminal and the first terminal's core network capability information. MBS capability information); or, the core network capability information of the first terminal in S21-S22 may be replaced with the MBS capability information of the first terminal.
  • the mobility management network element may determine that the first terminal requests to join the multicast group of the multicast service of the first terminal. In the case of a group, the MBS capability information of the first terminal is sent to the access network device. In this way, the mobility management network element can send the MBS capability information of the first terminal to the access network device when required by the access network device.
  • the mobility management network element may receive the MBS capability information of the first terminal from the first terminal, obtain the multicast information of the multicast group through S32, and determine the first terminal according to the multicast information of the multicast group Request to join the multicast group of the multicast service of the first terminal. In this case, the mobility management network element may send the MBS capability information of the first terminal to the access network device. It should be understood that, if the mobility management network element determines that the first terminal requests to join the multicast group of the multicast service of the first terminal, and finds that the MBS capability information of the first terminal has been sent to the access network device before, it may not sent to save signaling overhead.
  • S502 The access network device sends first indication information to the session management network element.
  • the session management network element receives the first indication information from the access network device.
  • the first indication information may be included in a reject message (reject message).
  • the rejection message may be used to indicate a rejection to communicate with the first terminal in the shared transmission mode.
  • the rejection message may be in response to multicast information of the multicast group, in which case the first indication information may include a cause value.
  • the cause value may indicate that the access network device cannot identify or parse the multicast information of the multicast group, or indicate the reason why the access network cannot identify or parse the multicast information of the multicast group.
  • the access network device does not support the shared transmission mode.
  • the session management network element may determine that the transmission mode of the first terminal is the independent transmission mode.
  • the session management network element allocates a first resource for transmitting multicast data to the first terminal according to the first indication information.
  • the access network device allocates a second resource for transmitting multicast data to the first terminal.
  • the second resource may include a transmission channel for transmitting multicast data between the access network device and the first terminal.
  • the access network device establishes a fourth transmission channel.
  • the fourth transmission channel is used to transmit multicast data between the access network device and the first terminal, and the fourth transmission channel is an independent transmission channel.
  • the fourth transmission channel may be is the transmission channel 104 .
  • the access network device may send the information of the fourth transmission channel to the first terminal.
  • the information of the fourth transmission channel may include frequency information and/or time information corresponding to the second resource. In this case, after receiving the multicast data, the access network device may send the multicast data to the first terminal through the fourth transmission channel.
  • the access network device establishes a fifth transmission channel.
  • the fifth transmission channel is used for transmitting multicast data between the access network device and the first terminal, and the fifth transmission channel is a shared transmission channel.
  • the fifth transmission channel may be the transmission channel 108 in FIG. 1B .
  • the access network device may send the information of the fifth transmission channel to the first terminal.
  • the information of the fifth transmission channel may include frequency information and/or time information corresponding to the second resource. In this case, after receiving the multicast data, the access network device may send the multicast data to the first terminal through the fifth transmission channel.
  • the access network device may have established a fifth transmission channel, for example, the access network device determines the transmission mode of the multicast service of the second terminal If the transmission mode is shared and the fifth transmission channel is established for the second terminal, the access network device does not need to establish the fifth transmission channel again.
  • both the first terminal and the second terminal are included in the multicast group, and the second terminal is different from the first terminal.
  • the second terminal may be terminal 2 . . . or terminal n in FIG. 2A .
  • the access network device can send the information of the fifth transmission channel to the first terminal without establishing the fifth transmission channel again.
  • the access network device establishes the fourth transmission channel or the fifth transmission channel.
  • the access network device establishes a fourth transmission channel, and the fourth transmission channel may be the transmission channel 111 .
  • the access network device establishes a fifth transmission channel, and the fifth transmission channel may be the transmission channel 115 .
  • the access network device may send the multicast data to the first terminal through the fourth transmission channel or the fifth transmission channel.
  • the access network device can determine the transmission mode of the multicast service of the first terminal, and indicate the transmission mode to the session management network element, so that the session management network element can allocate the transmission mode for the first terminal to the first terminal.
  • the first resource of multicast data can improve the flexibility of communication while realizing multicast data transmission.
  • the access network device knows its own MBS capability. Therefore, if the access network device determines the transmission mode of the multicast service of the first terminal, other network elements do not need to indicate the MBS capability of the access network device to the access network device. , which can save signaling overhead.
  • the actions of the access network equipment, the mobility management network element, the first terminal or the session management network element in the above S501-S503 may be called by the processor 301 in the communication apparatus 30 shown in FIG.
  • the application code is used for execution, and this embodiment of the present application does not impose any restrictions on this.
  • the transmission mode of the multicast service of the first terminal is determined by the access network device.
  • other network elements do not need to indicate the MBS capability of the access network device to the access network device, which can save signaling overhead.
  • the transmission mode of the multicast service of the first terminal may also be determined by the mobility management network element.
  • the mobility management network element can implement the methods provided by the embodiments of the present application through signaling or messages in existing standards, which is relatively easy to implement.
  • the mobility management network element can determine the transmission mode of the multicast service of the first terminal, and instruct the session management network element of the transmission mode.
  • the transmission mode so that the session management network element allocates the first resource for transmitting the multicast data to the first terminal according to the transmission mode, which can improve the flexibility of communication while realizing the transmission of the multicast data.
  • the communication method includes S601-S603.
  • the mobility management network element determines the transmission mode of the multicast service of the first terminal.
  • the mobility management network element may be the mobility management network element in FIG. 2A .
  • the first terminal may be any terminal in FIG. 2A, such as terminal 1, terminal 2 or terminal n.
  • the mobility management network element determines the transmission mode of the multicast service of the first terminal in the case of determining the multicast service requirement of the first terminal.
  • the mobility management network element may be triggered to determine the transmission mode of the multicast service of the first terminal through the process of the terminal requesting to join the multicast group.
  • the mobility management network element is triggered to determine the transmission mode of the multicast service of the first terminal through the methods shown in the above S31-S32. That is to say, after the mobility management network element receives the third request from the first terminal, or after the mobility management network element receives the multicast information of the multicast group from the session management network element, it determines the first terminal The transmission mode of the multicast service.
  • the session management network element may be the session management network element shown in FIG. 2A .
  • the session management network element may be a multicast session management network element corresponding to managing the multicast service of the first terminal, and may also be a session management network element (ie, a unicast session) that manages a PDU session (such as a unicast session) of the first terminal. management network element).
  • the mobility management network element determines the transmission mode of the multicast service of the first terminal according to one or more of the following information: MBS capability of the access network device, MBS capability information of the first terminal, multicast The service requirements of the service or the number of terminals that have joined the multicast service.
  • MBS capability of the access network device MBS capability information of the first terminal
  • multicast The service requirements of the service or the number of terminals that have joined the multicast service.
  • the mobility management network element receives the MBS capability information of the access network device from the access network device.
  • the access network device may be the access network device in FIG. 2A .
  • the MBS capability information of the access network device may be used to indicate the MBS capability of the access network device. Further, the MBS capability information of the access network device is included in the NG interface application protocol setup (NGAP setup) message.
  • NGAP setup NG interface application protocol setup
  • the mobility management network element receives the MBS capability information of the first terminal from the first terminal. Further, the MBS capability information of the first terminal is included in the registration request message. Or, the MBS capability information of the first terminal is included in the request message for joining the multicast group of the multicast service. For example, the MBS capability information of the first terminal may be included in the third request of S31, which is sent by the first terminal to The mobility management network element, after receiving the third request, can obtain the MBS capability information of the first terminal, and send the third request to the session management network element.
  • the mobility management network element sends first indication information to the session management network element.
  • the session management network element receives the first indication information from the mobility management network element.
  • the session management network element allocates a first resource for transmitting multicast data to the first terminal according to the first indication information.
  • the mobility management network element sends first indication information to the access network device to indicate the transmission mode of the multicast service of the first terminal to the access network device.
  • the access network device may allocate a second resource for transmitting multicast data to the first terminal according to the first indication information. For the process of allocating the second resource by the access network device, reference may be made to the description in S503 above.
  • the mobility management network element can determine the transmission mode of the multicast service of the first terminal, and indicate the transmission mode to the session management network element, so that the session management network element can allocate a
  • the first resource for transmitting multicast data can improve the flexibility of communication while realizing multicast data transmission.
  • the information in the method shown in FIG. 6 for example, the first indication information, the third request, the multicast information of the multicast group, the MBS capability information of the first terminal, the MBS capability information of the access network device, etc., may be Through the signaling or message transmission in the existing standard, the modification to the existing standard is small, and the implementation is relatively easy.
  • the actions of the access network equipment, the mobility management network element, the first terminal or the session management network element in the above S601-S603 can be called by the processor 301 in the communication apparatus 30 shown in FIG.
  • the application code is used for execution, and this embodiment of the present application does not impose any restrictions on this.
  • the access network device, the first terminal, the session management network element or the mobility management network element, etc. include hardware structures and/or software modules corresponding to each function.
  • the unit and algorithm operations of each example described in conjunction with the embodiments disclosed herein can be implemented in hardware or in the form of a combination of hardware and computer software. Whether a function is performed by hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.
  • the access network device, the first terminal, the session management network element, or the mobility management network element may be divided into functional modules according to the foregoing method examples.
  • each functional module may be divided corresponding to each function, or two One or more functions are integrated in one processing module.
  • the above-mentioned integrated modules can be implemented in the form of hardware, and can also be implemented in the form of software function modules. It should be noted that, the division of modules in the embodiments of the present application is schematic, and is only a logical function division, and there may be other division manners in actual implementation.
  • FIG. 7 shows a schematic structural diagram of a communication device.
  • the communication device may be a network-side device or a chip or a system-on-a-chip in the network-side device, or other combined devices, components, etc. that can implement the functions of the network-side device, and the communication device may be used to execute the network-side device involved in the foregoing embodiments. function of the device.
  • the communication apparatus shown in FIG. 7 includes: a processing module 701 and a sending module 702 .
  • the communication apparatus shown in FIG. 7 further includes: a receiving module 703 .
  • the processing module 701 is configured to determine the transmission mode of the multicast service of the first terminal, the transmission mode is an independent transmission mode or a shared transmission mode, and the communication device is an access network device or a mobility management network element. For example, in conjunction with FIG. 4 , the processing module 701 may be used to perform S401.
  • the sending module 702 is configured to send first indication information to the session management network element, where the first indication information is used to indicate the transmission mode of the multicast service.
  • the sending module 702 may be configured to perform S402.
  • the processing module 701 is specifically configured to determine the transmission mode according to the MBS capability of the access network device, wherein the MBS capability of the access network device is whether the access network device supports the shared transmission mode.
  • the processing module 701 is specifically configured to determine that the transmission mode is the shared transmission mode if the MBS capability of the access network device is that the access network device supports the shared transmission mode; or, the processing module 701 is also specifically configured to use If the MBS capability of the access network device is that the access network device does not support the shared transmission mode, the transmission mode is determined to be the individual transmission mode.
  • the processing module 701 is specifically configured to determine the transmission mode according to the MBS capability of the access network device and the MBS capability information of the first terminal; or, the processing module 701 is specifically configured to determine the transmission mode according to the MBS capability of the access network device.
  • the MBS capability, the MBS capability information of the first terminal, and the number of terminals that have joined the multicast service determine the transmission mode; wherein, the MBS capability information of the first terminal represents whether the first terminal supports the shared transmission mode.
  • the processing module 701 is further specifically configured to, if the MBS capability of the access network device is that the access network device supports the shared transmission mode, and the MBS capability information of the first terminal indicates that the first terminal supports the shared transmission mode, Then determine that the transmission mode is the shared transmission mode; or, the processing module 701 is further specifically configured to, if the MBS capability of the access network device is that the access network device does not support the shared transmission mode, or the MBS capability information of the first terminal represents the first terminal If the shared transmission mode is not supported, the transmission mode is determined to be the individual transmission mode.
  • the processing module 701 is further specifically configured to, if the MBS capability of the access network device is that the access network device supports the shared transmission mode, the MBS capability information of the first terminal indicates that the first terminal supports the shared transmission mode, and If the number of terminals that have joined the multicast service is greater than or equal to the first threshold, it is determined that the transmission mode is the shared transmission mode; or, the processing module 701 is also specifically configured to be used if the MBS capability of the access network device is that the access network device supports sharing Transmission mode, the MBS capability information of the first terminal indicates that the first terminal supports the shared transmission mode, and the number of terminals that have joined the multicast service is less than the first threshold, the transmission mode is determined to be the individual transmission mode.
  • the communication apparatus is an access network device
  • the receiving module 703 is configured to receive the MBS capability information of the first terminal from the first terminal.
  • the MBS capability information of the first terminal is included in the wireless capability information of the first terminal.
  • the communication apparatus is an access network device
  • the receiving module 703 is configured to receive the MBS capability information of the first terminal from the mobility management network element.
  • the MBS capability information of the first terminal is included in the core network capability information of the first terminal.
  • the communication device is an access network device
  • the processing module 701 determines that the transmission mode is the individual transmission mode
  • the first indication information is included in the rejection message
  • the rejection message is used to indicate that the shared transmission mode is rejected with the first terminal communication.
  • the communication device is an access network device
  • the receiving module 703 is configured to receive the multicast information of the multicast group from the session management network element, and the multicast information of the multicast group is used to indicate the multiple requirements for broadcasting services.
  • the communication device is a mobility management network element
  • the receiving module 703 is further configured to receive MBS capability information of the access network device from the access network device, and the MBS capability information of the access network device is used for Indicates the MBS capability of the access network device.
  • the MBS capability information of the access network device is included in the NG interface application protocol establishment message.
  • the communication device is a mobility management network element
  • the receiving module 703 is configured to receive the MBS capability information of the first terminal from the first terminal.
  • the MBS capability information of the first terminal is included in the registration request message, or the MBS capability information of the first terminal is included in the request message for joining the multicast group of the multicast service.
  • the communication device is presented in the form of dividing each functional module in an integrated manner.
  • Module herein may refer to a specific ASIC, circuit, processor and memory executing one or more software or firmware programs, integrated logic circuit, and/or other device that may provide the functions described above.
  • the communication device may take the form shown in FIG. 3 .
  • the processor 301 in FIG. 3 may invoke the computer-executed instructions stored in the memory 303 to cause the communication apparatus to execute the communication method in the foregoing method embodiment.
  • the functions/implementation processes of the processing module 701, the sending module 702 and the receiving module 703 in FIG. 7 can be implemented by the processor 301 in FIG. 3 calling the computer-executed instructions stored in the memory 303.
  • the function/implementation process of the processing module 701 in FIG. 7 can be implemented by the processor 301 in FIG. 3 calling the computer-executed instructions stored in the memory 303, and the functions/implementation of the sending module 702 and the receiving module 703 in FIG. 7
  • the process may be implemented through the communication interface 304 in FIG. 3 .
  • the communication device provided in this embodiment can perform the above-mentioned communication method, the technical effect that can be obtained may refer to the above-mentioned method embodiment, which will not be repeated here.
  • FIG. 8 shows a schematic structural diagram of a communication device.
  • the communication device may be a session management network element or a chip or a system-on-chip in the session management network element, or other combined devices, components, etc. that can implement the functions of the session management network element. function of the session management network element.
  • the communication apparatus shown in FIG. 8 includes: a receiving module 801 and a processing module 802 .
  • the receiving module 801 is configured to receive first indication information from a network-side device, where the network-side device is an access network device or a mobility management network element, and the first indication information is used to instruct the first terminal to transmit a multicast service mode, the transmission mode is the single transmission mode or the shared transmission mode.
  • the receiving module 801 is configured to execute S402.
  • the processing module 802 is configured to allocate a first resource for transmitting multicast data to the first terminal according to the first indication information. For example, in conjunction with FIG. 4 , the processing module 802 is configured to execute S403.
  • the first indication information indicates that the transmission mode is a separate transmission mode
  • the processing module 802 is specifically configured to establish a first transmission channel, and the first transmission channel is used for the multicast user plane network element and the unicast user plane network. transfer data between elements.
  • the communication device is a unicast session management network element
  • the processing module 802 is further specifically configured to establish a second transmission channel, and the second transmission channel is used for the communication between the unicast user plane network element and the access network equipment. to transmit multicast data between them.
  • the first indication information indicates that the transmission mode is a shared transmission mode
  • the processing module 802 is specifically configured to establish a third transmission channel, and the third transmission channel is used for multicasting between the user plane network element and the access network equipment. to transmit multicast data between them.
  • the communication device is presented in the form of dividing each functional module in an integrated manner.
  • Module herein may refer to a specific ASIC, circuit, processor and memory executing one or more software or firmware programs, integrated logic circuit, and/or other device that may provide the functions described above.
  • the communication device may take the form shown in FIG. 8 .
  • the processor 301 in FIG. 3 may invoke the computer-executed instructions stored in the memory 303 to cause the communication apparatus to execute the communication method in the foregoing method embodiment.
  • the functions/implementation process of the receiving module 801 and the processing module 802 in FIG. 8 may be implemented by the processor 301 in FIG. 3 calling the computer-executed instructions stored in the memory 303 .
  • the function/implementation process of the processing module 802 in FIG. 8 can be implemented by the processor 301 in FIG. 3 calling the computer-executed instructions stored in the memory 303, and the function/implementation process of the receiving module 801 in FIG. 3 of the communication interface 304 to achieve.
  • the communication device provided in this embodiment can perform the above-mentioned communication method, the technical effect that can be obtained may refer to the above-mentioned method embodiment, which will not be repeated here.
  • FIG. 9 shows a schematic structural diagram of a communication device.
  • the communication apparatus shown in FIG. 9 includes: a processing module 901 and a sending module 902 .
  • the communication device may be the first terminal or a chip or a system-on-chip in the first terminal, or other combined devices, components, etc. that can realize the functions of the first terminal, and the communication device may be used to execute The functions of the first terminal involved in the foregoing embodiments.
  • the processing module 901 is configured to acquire MBS capability information of the communication device, wherein the MBS capability information of the communication device represents whether the communication device supports the shared transmission mode.
  • the sending module 902 is configured to send the MBS capability information of the communication device to a network side device, where the network side device is an access network device or a mobility management network element.
  • the MBS capability information of the communication device is included in the wireless capability information of the communication device.
  • the network-side device is a mobility management network element
  • the MBS capability information of the communication device is included in the registration request message, or the MBS capability information of the communication device is included in the multicast service added to the communication device. in the request message of the broadcast group.
  • the communication device may be a mobility management network element or a chip or a system-on-a-chip in the mobility management network element, or other combined devices, components, etc. that can realize the functions of the mobility management network element.
  • the communication apparatus may be used to perform the functions of the mobility management network element involved in the above embodiments.
  • the processing module 901 is configured to acquire MBS capability information of the first terminal, wherein the MBS capability information of the first terminal represents whether the first terminal supports the shared transmission mode.
  • the sending module 902 is configured to send the MBS capability information of the first terminal to the access network device.
  • the processing module 901 is further configured to determine the multicast group to which the first terminal requests to join the multicast service of the first terminal.
  • the MBS capability information of the first terminal is included in the core network capability information of the first terminal.
  • the communication device may be an access network device or a chip or a system-on-chip in the access network device, or other combined devices, components, etc. that can realize the functions of the access network device, and the communication device may be It is used to execute the functions of the access network equipment involved in the above embodiments.
  • the processing module 901 is configured to acquire MBS capability information of the communication device, wherein the MBS capability information of the communication device is used to indicate the MBS capability of the communication device, and the MBS capability of the communication device is whether the communication device supports the shared transmission mode.
  • the sending module 902 is configured to send the MBS capability information of the communication device to the mobility management network element.
  • the MBS capability information of the communication device is included in the NG interface application protocol establishment message.
  • the communication device is presented in the form of dividing each functional module in an integrated manner.
  • Module herein may refer to a specific ASIC, circuit, processor and memory executing one or more software or firmware programs, integrated logic circuit, and/or other device that may provide the functions described above.
  • the communication device may take the form shown in FIG. 3 .
  • the processor 301 in FIG. 3 may invoke the computer-executed instructions stored in the memory 303 to cause the communication apparatus to execute the communication method in the foregoing method embodiment.
  • the functions/implementation processes of the processing module 901 and the sending module 902 in FIG. 9 may be implemented by the processor 301 in FIG. 3 calling the computer-executed instructions stored in the memory 303 .
  • the function/implementation process of the processing module 901 in FIG. 9 may be implemented by the processor 301 in FIG. 3 calling the computer-executed instructions stored in the memory 303, and the function/implementation process of the sending module 902 in FIG. 3 of the communication interface 304 to achieve.
  • the communication device provided in this embodiment can perform the above-mentioned communication method, the technical effect that can be obtained may refer to the above-mentioned method embodiment, which will not be repeated here.
  • FIG. 10 is a schematic diagram of the composition of a communication system provided by an embodiment of the application.
  • the communication system may include a terminal 1001 , an access network device 1002 , a session management network element 1003 and a mobility management network element 1004 .
  • the terminal 1001 may be configured to perform the function of the first terminal involved in the method shown in FIG. 5 above.
  • the access network device 1002 may be configured to perform the functions of the access network device involved in the method shown in FIG. 5 above.
  • the session management network element 1003 may be configured to perform the function of the session management network element involved in the method shown in FIG. 5 above.
  • the mobility management network element 1004 may be configured to perform the functions of the mobility management network element involved in the method shown in FIG. 5 above.
  • the access network device 1002 may determine the transmission mode of the multicast service of the terminal 1001, and send the first indication information to the session management network element 1003 through the mobility management network element 1004.
  • the session management network element 1003 may receive the first indication information from the access network device 1002 through the mobility management network element 1004, and allocate the terminal 1001 the first resource for transmitting multicast data according to the first indication information.
  • the terminal 1001 may be configured to execute the function of the first terminal involved in the method shown in FIG. 6 above.
  • the access network device 1002 may be configured to perform the functions of the access network device involved in the method shown in FIG. 6 above.
  • the session management network element 1003 may be configured to perform the function of the session management network element involved in the method shown in FIG. 6 above.
  • the mobility management network element 1004 may be configured to perform the functions of the mobility management network element involved in the method shown in FIG. 6 above.
  • the mobility management network element 1004 may determine the transmission mode of the multicast service of the terminal 1001, and send the first indication information to the session management network element 1003.
  • the session management network element 1003 may receive the first indication information from the mobility management network element 1004, and according to the first indication information, allocate the terminal 1001 with a first resource for transmitting multicast data.
  • each network element in FIG. 10 For the execution process of each network element in FIG. 10 , reference may be made to the execution steps of the corresponding network element in the method shown in FIG. 5 or FIG. 6 , which will not be repeated.
  • the embodiments of the present application also provide a computer-readable medium. All or part of the processes in the above method embodiments may be completed by instructing relevant hardware by a computer program, the program may be stored in the above computer readable medium, and when executed, the program may include the processes in the above method embodiments.
  • the computer-readable medium may be the communication device of any of the foregoing embodiments, such as: an internal storage unit including a transmitting end and/or a receiving end, such as a hard disk or a memory of the communication device.
  • the above-mentioned computer-readable medium can also be an external storage device of the above-mentioned communication device, such as a plug-in hard disk equipped on the above-mentioned communication device, a smart memory card (smart media card, SMC), a secure digital (secure digital, SD) card, flash memory card (flash card), etc. Further, the above-mentioned computer-readable medium may also include both an internal storage unit of the above-mentioned communication apparatus and an external storage device.
  • the above-mentioned computer-readable medium is used for storing the above-mentioned computer program and other programs and data required by the above-mentioned communication device.
  • the computer-readable medium described above can also be used to temporarily store data that has been output or is to be output.
  • the embodiments of the present application also provide a computer program product. All or part of the processes in the above method embodiments may be completed by a computer program instructing relevant hardware, the program may be stored in the above computer program product, and when executed, the program may include the processes in the above method embodiments.
  • the embodiments of the present application also provide a computer instruction. All or part of the processes in the above method embodiments may be completed by computer instructions to instruct relevant hardware (eg, computers, processors, access network devices, mobility management network elements or session management network elements, etc.).
  • the program may be stored in the above-mentioned computer-readable medium or in the above-mentioned computer program product.
  • the disclosed apparatus and method may be implemented in other manners.
  • the device embodiments described above are only illustrative.
  • the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be Incorporation may either be integrated into another device, or some features may be omitted, or not implemented.
  • the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components shown as units may be one physical unit or multiple physical units, that is, they may be located in one place, or may be distributed to multiple different places . Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.
  • the above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.
  • the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a readable storage medium.
  • the technical solutions of the embodiments of the present application can be embodied in the form of software products in essence, or the parts that contribute to the prior art, or all or part of the technical solutions, which are stored in a storage medium , including several instructions to make a device (may be a single chip microcomputer, a chip, etc.) or a processor (processor) to execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage medium includes: a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk and other mediums that can store program codes.

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Abstract

本申请公开了通信方法及装置，涉及无线通信领域，可以为网络侧设备和终端确定该终端的多播业务的传输模式，提高通信地灵活性。该方法包括：接入网设备或移动性管理网元确定第一终端的多播业务的传输模式，并向会话管理网元发送用于指示该传输模式的第一指示信息。其中，该传输模式为单独传输模式或共享传输模式。

Description

通信方法及装置 技术领域
本申请涉及无线通信领域，尤其涉及通信方法及装置。
背景技术
第三代合作伙伴计划(3rd generation partnership project，3GPP)网络中，存在网络侧设备向多个终端(例如，一个多播群组中的终端)发送多播业务的数据(后续可以称为多播数据)的需求，即点对多点的数据传输需求。在这种情况下，网络侧设备可以采用多播业务的传输模式与该多个终端通信。其中，多播业务的传输模式包括单独传输模式(individual delivery mode)或共享传输模式(shared delivery mode)。
对于单独传输模式，网络侧设备可以为多个终端分别建立传输通道，这样网络侧设备可以通过每个传输通道向每个终端发送多播数据。其中，不同的终端对应的传输通道不同，不同的传输通道对应的网络资源也不同，因此通过单独传输模式传输多播数据的过程中占用的网络资源较多。但是，单独传输模式对网络侧设备的要求较低，更容易实现。对于共享传输模式，网络侧设备可以为多个终端建立一个传输通道，这样网络侧设备可以通过这个传输通道向多个终端发送多播数据。采用共享传输模式，多个终端可以共用网络资源，能够节约网络资源，提高网络资源的利用率。但是，共享传输模式实现起来较为复杂，对网络侧设备的要求较高。
目前，在网络侧设备向多个终端发送多播数据的情况下，网络侧设备都是采用固定的传输模式和终端通信，通信地灵活性差。
发明内容
本申请提供通信方法及装置，可以为网络侧设备和终端确定终端的多播业务的传输模式，提高通信地灵活性。
为达到上述目的，本申请的实施例采用如下技术方案：
第一方面，本申请实施例提供一种通信方法，该方法包括：网络侧设备确定第一终端的多播业务的传输模式，其中，该传输模式为单独传输模式或共享传输模式，网络侧设备为接入网设备或移动性管理网元；网络侧设备向会话管理网元发送第一指示信息，该第一指示信息用于指示多播业务的传输模式。
基于上述第一方面提供的方法，网络侧设备可以确定第一终端的多播业务的传输模式，并向会话管理网元指示该传输模式，使得会话管理网元可以为第一终端分配用于传输多播数据的第一资源，可以在实现多播数据传输的同时，提高通信地灵活性。
一种可能的实现方式，网络侧设备确定第一终端的多播业务的传输模式，包括：网络侧设备根据接入网设备的多播/广播业务(multicast/broadcast service，MBS)能力确定传输模式，其中，接入网设备的MBS能力为接入网设备是否支持共享传输模式。基于上述方法，网络侧设备可以根据接入网设备是否支持共享传输模式来确定第一终 端的多播业务的传输模式，以便通过该传输模式传输多播数据。
一种可能的实现方式，网络侧设备根据接入网设备的MBS能力确定传输模式，包括：若接入网设备的MBS能力为接入网设备支持共享传输模式，则网络侧设备确定传输模式为共享传输模式；或者，若接入网设备的MBS能力为接入网设备不支持共享传输模式，则网络侧设备确定传输模式为单独传输模式。基于上述方法，在接入网设备支持共享传输模式的情况下，网络侧设备可以确定传输模式为共享传输模式，以节约网络资源，提高网络资源的利用率。在接入网设备不支持共享传输模式的情况下，网络侧设备可以确定传输模式为单独传输模式，以降低多播数据传输的复杂度。
一种可能的实现方式，网络侧设备根据接入网设备的MBS能力确定传输模式，包括：网络侧设备根据接入网设备的MBS能力和第一终端的MBS能力信息，确定传输模式；或者，网络侧设备根据接入网设备的MBS能力、第一终端的MBS能力信息和已加入多播业务的终端的数量，确定传输模式；其中，第一终端的MBS能力信息表征第一终端是否支持共享传输模式。基于上述方法，网络侧设备可以通过多种方式确定传输模式，以满足不同场景下的传输需求。例如，若传输资源充足，网络侧设备在确定传输模式的过程中，可以不考虑已加入多播业务的终端的数量；若传输资源不足，网络侧设备在确定传输模式的过程中，可以考虑已加入多播业务的终端的数量，若已加入多播业务的终端的数量较多，可以确定传输模式为共享传输模式，以节约网络资源，提高网络资源的利用率。
一种可能的实现方式，网络侧设备根据接入网设备的MBS能力和第一终端的MBS能力信息，确定传输模式，包括：若接入网设备的MBS能力为接入网设备支持共享传输模式，且第一终端的MBS能力信息表征第一终端支持共享传输模式，则网络侧设备确定传输模式为共享传输模式；或者，若接入网设备的MBS能力为接入网设备不支持共享传输模式，或者第一终端的MBS能力信息表征第一终端不支持共享传输模式，则网络侧设备确定传输模式为单独传输模式。基于上述方法，在接入网设备支持共享传输模式且第一终端支持共享传输模式的情况下，网络侧设备可以确定传输模式为共享传输模式，以节约网络资源，提高网络资源的利用率。在接入网设备不支持共享传输模式，或第一终端不支持共享传输模式的情况下，网络侧设备可以确定传输模式为单独传输模式，以降低多播数据传输的复杂度。
一种可能的实现方式，网络侧设备根据接入网设备的MBS能力、第一终端的MBS能力信息和已加入多播业务的终端的数量，确定传输模式，包括：若接入网设备的MBS能力为接入网设备支持共享传输模式，第一终端的MBS能力信息表征第一终端支持共享传输模式，且已加入多播业务的终端的数量大于或等于第一阈值，则网络侧设备确定传输模式为共享传输模式；或者，若接入网设备的MBS能力为接入网设备支持共享传输模式，第一终端的MBS能力信息表征第一终端支持共享传输模式，且已加入多播业务的终端的数量小于第一阈值，则网络侧设备确定传输模式为单独传输模式。基于上述方法，在接入网设备支持共享传输模式，第一终端支持共享传输模式且已加入多播业务的终端的数量大于或等于第一阈值的情况下，网络侧设备可以确定传输模式为共享传输模式，以节约网络资源，提高网络资源的利用率。在接入网设备支持共享传输模式，第一终端支持共享传输模式且已加入多播业务的终端的数量小于第一阈值 的情况下，网络侧设备可以确定传输模式为单独传输模式，以降低多播数据传输的复杂度，提高第一终端接收多播数据的成功率。
一种可能的实现方式，网络侧设备为接入网设备，该方法还包括：网络侧设备接收来自第一终端的第一终端的MBS能力信息。基于上述方法，在网络侧设备为接入网设备的情况下，网络侧设备可以从第一终端获取第一终端的MBS能力信息。
一种可能的实现方式，第一终端的MBS能力信息包括在第一终端的无线能力信息中。基于上述方法，第一终端可以在向接入网设备上报第一终端的无线能力信息的时候，向接入网设备上报第一终端的MBS能力信息。
一种可能的实现方式，网络侧设备为接入网设备，该方法还包括：网络侧设备接收来自移动性管理网元的第一终端的MBS能力信息。基于上述方法，在网络侧设备为接入网设备的情况下，网络侧设备可以从移动性管理网元获取第一终端的MBS能力信息。
一种可能的实现方式，第一终端的MBS能力信息包括在第一终端的核心网能力信息中。基于上述方法，移动性管理网元可以在向接入网设备发送第一终端的核心网能力信息的时候，向接入网设备发送第一终端的MBS能力信息。
一种可能的实现方式，网络侧设备为接入网设备，网络侧设备确定传输模式为单独传输模式，第一指示信息包括在拒绝消息中，拒绝消息用于指示拒绝采用共享传输模式与第一终端通信。基于上述方法，若网络侧设备为接入网设备，且网络侧设备确定传输模式为单独传输模式，则网络侧设备可以通过拒绝消息指示该传输模式为单独传输模式。
一种可能的实现方式，网络侧设备为接入网设备，该方法还包括：网络侧设备接收来自会话管理网元的多播群组的多播信息，多播群组的多播信息用于指示多播业务的要求。基于上述方法，可以通过多播群组的多播信息触发网络侧设备确定第一终端的多播业务的传输模式。
一种可能的实现方式，网络侧设备为移动性管理网元，该方法还包括：网络侧设备接收来自接入网设备的接入网设备的MBS能力信息，接入网设备的MBS能力信息用于指示接入网设备的MBS能力。基于上述方法，在网络侧设备为移动性管理网元的情况下，网络侧设备可以从接入网设备获取接入网设备的MBS能力信息，以便网络侧设备确定第一终端的多播业务的传输模式。
一种可能的实现方式，接入网设备的MBS能力信息包括在NG接口应用协议建立消息中。基于上述方法，接入网设备的MBS能力信息可以通过NG接口应用协议建立消息发送给移动性管理网元。
一种可能的实现方式，网络侧设备为移动性管理网元，该方法还包括：网络侧设备接收来自第一终端的第一终端的MBS能力信息。基于上述方法，在网络侧设备为移动性管理网元的情况下，网络侧设备可以从第一终端获取第一终端的MBS能力信息，以便网络侧设备确定第一终端的多播业务的传输模式。
一种可能的实现方式，第一终端的MBS能力信息包括在注册请求消息中，或者，第一终端的MBS能力信息包括在加入多播业务的多播群组的请求消息中。基于上述方法，第一终端的MBS能力信息可以通过注册请求消息或加入多播业务的多播群组 的请求消息发送给移动性管理网元。
第二方面，本申请实施例提供一种通信方法，该方法包括：会话管理网元接收来自网络侧设备的第一指示信息，其中，网络侧设备为接入网设备或移动性管理网元，第一指示信息用于指示第一终端的多播业务的传输模式，传输模式为单独传输模式或共享传输模式；会话管理网元根据第一指示信息，为第一终端分配用于传输多播数据的第一资源。
基于上述第二方面提供的方法，会话管理网元可以根据网络侧设备确定的第一终端的多播业务的传输模式，为第一终端分配对应的资源，以实现多播数据的传输。
一种可能的实现方式，第一指示信息指示传输模式为单独传输模式，会话管理网元根据第一指示信息，为第一终端分配用于传输多播数据的第一资源，包括：会话管理网元建立第一传输通道，第一传输通道用于多播用户面网元与单播用户面网元之间传输数据。基于上述方法，在第一指示信息指示传输模式为单独传输模式的情况下，多播用户面网元接收到多播数据后，可以通过第一传输通道向单播用户面网元发送该多播数据，以便单播用户面网元通过接入网设备向第一终端发送多播数据。
一种可能的实现方式，会话管理网元为单播会话管理网元，会话管理网元根据第一指示信息，为第一终端分配用于传输多播数据的第一资源，还包括：会话管理网元建立第二传输通道，第二传输通道用于单播用户面网元与接入网设备之间传输多播数据。基于上述方法，单播用户面网元接收到多播数据后，可以通过第二传输通道向接入网设备发送该多播数据，以便接入网设备向第一终端发送该多播数据。
一种可能的实现方式，第一指示信息指示传输模式为共享传输模式，会话管理网元根据第一指示信息，为第一终端分配用于传输多播数据的第一资源，包括：会话管理网元建立第三传输通道，第三传输通道用于多播用户面网元与接入网设备之间传输多播数据。基于上述方法，在第一指示信息指示传输模式为共享传输模式的情况下，多播用户面网元接收到多播数据后，可以通过第三传输通道向接入网设备发送该多播数据，以便接入网设备向第一终端发送该多播数据。
第三方面，本申请实施例提供一种通信方法，其特征在于，该方法包括：第一终端获取第一终端的MBS能力信息，其中，第一终端的MBS能力信息表征第一终端是否支持共享传输模式；第一终端向网络侧设备发送第一终端的MBS能力信息，网络侧设备为接入网设备或移动性管理网元。
基于上述第三方面提供的方法，第一终端可以向网络侧设备发送第一终端的MBS能力信息，以便网络侧设备确定第一终端的多播业务的传输模式。
一种可能的实现方式，若网络侧设备为接入网设备，第一终端的MBS能力信息包括在第一终端的无线能力信息中。基于上述方法，若网络侧设备为接入网设备，第一终端可以在上报第一终端的无线能力信息的时候，向网络侧设备上报第一终端的MBS能力信息。
一种可能的实现方式，若网络侧设备为移动性管理网元，第一终端的MBS能力信息包括在注册请求消息中，或者，第一终端的MBS能力信息包括在加入第一终端的多播业务的多播群组的请求消息中。若网络侧设备为移动性管理网元，第一终端可以通过注册请求消息，或加入第一终端的多播业务的多播群组的请求消息，向网络侧设备 发送第一终端的MBS能力信息。
第四方面，本申请实施例提供一种通信方法，该方法包括：移动性管理网元获取第一终端的MBS能力信息，其中，第一终端的MBS能力信息表征第一终端是否支持共享传输模式；移动性管理网元向接入网设备发送第一终端的MBS能力信息。
基于上述第四方面提供的方法，移动性管理网元可以向接入网设备发送第一终端的MBS能力信息，以便接入网设备确定第一终端的多播业务的传输模式。
一种可能的实现方式，在移动性管理网元向接入网设备发送第一终端的MBS能力信息之前，方法还包括：移动性管理网元确定第一终端请求加入第一终端的多播业务的多播群组。基于上述方法，移动性管理网元可以在确定第一终端请求加入第一终端的多播业务的多播群组的情况下，向接入网设备发送第一终端的MBS能力信息。如此，可以节省信令开销。
一种可能的实现方式，第一终端的MBS能力信息包括在第一终端的核心网能力信息中。基于上述方法，移动性管理网元可以在向接入网设备发送第一终端的核心网能力信息的时候，向接入网设备发送第一终端的MBS能力信息。
第五方面，本申请实施例提供一种通信方法，该方法包括：接入网设备获取接入网设备的MBS能力信息，其中，接入网设备的MBS能力信息用于指示接入网设备的MBS能力，接入网设备的MBS能力为接入网设备是否支持共享传输模式；接入网设备向移动性管理网元发送接入网设备的MBS能力信息。
基于上述第五方面提供的方法，接入网设备可以向移动性管理网元发送接入网设备的MBS能力信息，以便移动性管理网元根据接入网设备的MBS能力确定第一终端的多播业务的传输模式。
一种可能的实现方式，接入网设备的MBS能力信息包括在NG接口应用协议建立消息中。基于上述方法，接入网设备可以通过NG接口应用协议建立消息向移动性管理网元发送接入网设备的MBS能力信息。
第六方面，本申请实施例提供一种通信装置，可以实现上述第一方面、或第一方面任一种可能的实现方式中的方法。该装置包括用于执行上述方法的相应的单元或部件。该装置包括的单元可以通过软件和/或硬件方式实现。该装置例如可以为网络侧设备、或者为可支持网络侧设备实现上述方法的芯片、芯片系统、或处理器等。
第七方面，本申请实施例提供一种通信装置，可以实现上述第二方面、或第二方面任一种可能的实现方式中的方法。该装置包括用于执行上述方法的相应的单元或部件。该装置包括的单元可以通过软件和/或硬件方式实现。该装置例如可以为会话管理网元、或者为可支持会话管理网元实现上述方法的芯片、芯片系统、或处理器等。
第八方面，本申请实施例提供一种通信装置，可以实现上述第三方面、或第三方面任一种可能的实现方式中的方法。该装置包括用于执行上述方法的相应的单元或部件。该装置包括的单元可以通过软件和/或硬件方式实现。该装置例如可以为第一终端、或者为可支持第一终端实现上述方法的芯片、芯片系统、或处理器等。
第九方面，本申请实施例提供一种通信装置，可以实现上述第四方面、或第四方面任一种可能的实现方式中的方法。该装置包括用于执行上述方法的相应的单元或部件。该装置包括的单元可以通过软件和/或硬件方式实现。该装置例如可以为移动性管 理网元、或者为可支持移动性管理网元实现上述方法的芯片、芯片系统、或处理器等。
第十方面，本申请实施例提供一种通信装置，可以实现上述第五方面、或第五方面任一种可能的实现方式中的方法。该装置包括用于执行上述方法的相应的单元或部件。该装置包括的单元可以通过软件和/或硬件方式实现。该装置例如可以为接入网设备、或者为可支持接入网设备实现上述方法的芯片、芯片系统、或处理器等。
第十一方面，本申请实施例提供一种通信装置，包括：处理器，所述处理器与存储器耦合，所述存储器用于存储程序或指令，当所述程序或指令被所述处理器执行时，使得该装置实现上述第一方面、或第一方面任一种可能的实现方式中所述的方法。
第十二方面，本申请实施例提供一种通信装置，包括：处理器，所述处理器与存储器耦合，所述存储器用于存储程序或指令，当所述程序或指令被所述处理器执行时，使得该装置实现上述第二方面、或第二方面任一种可能的实现方式中所述的方法。
第十三方面，本申请实施例提供一种通信装置，包括：处理器，所述处理器与存储器耦合，所述存储器用于存储程序或指令，当所述程序或指令被所述处理器执行时，使得该装置实现上述第三方面、或第三方面任一种可能的实现方式中所述的方法。
第十四方面，本申请实施例提供一种通信装置，包括：处理器，所述处理器与存储器耦合，所述存储器用于存储程序或指令，当所述程序或指令被所述处理器执行时，使得该装置实现上述第四方面、或第四方面任一种可能的实现方式中所述的方法。
第十五方面，本申请实施例提供一种通信装置，包括：处理器，所述处理器与存储器耦合，所述存储器用于存储程序或指令，当所述程序或指令被所述处理器执行时，使得该装置实现上述第五方面、或第五方面任一种可能的实现方式中所述的方法。
第十六方面，本申请实施例提供一种芯片系统，该芯片系统包括至少一个处理器，用于支持实现上述第一方面、或第一方面任一种可能的实现方式中所涉及的功能，例如，收发或处理上述方法中所涉及的数据和/或信息。
第十七方面，本申请实施例提供一种芯片系统，该芯片系统包括至少一个处理器，用于支持实现上述第二方面、或第二方面任一种可能的实现方式中所涉及的功能，例如，收发或处理上述方法中所涉及的数据和/或信息。
第十八方面，本申请实施例提供一种芯片系统，该芯片系统包括至少一个处理器，用于支持实现上述第三方面、或第三方面任一种可能的实现方式中所涉及的功能，例如，收发或处理上述方法中所涉及的数据和/或信息。
第十九方面，本申请实施例提供一种芯片系统，该芯片系统包括至少一个处理器，用于支持实现上述第四方面、或第四方面任一种可能的实现方式中所涉及的功能，例如，收发或处理上述方法中所涉及的数据和/或信息。
第二十方面，本申请实施例提供一种芯片系统，该芯片系统包括至少一个处理器，用于支持实现上述第五方面、或第五方面任一种可能的实现方式中所涉及的功能，例如，收发或处理上述方法中所涉及的数据和/或信息。
第十六方面、第十七方面、第十八方面、第十九方面或第二十方面的一种可能的实现方式，所述芯片系统还包括存储器，所述存储器，用于保存程序指令和数据，存储器位于处理器之内或处理器之外。该芯片系统，可以由芯片构成，也可以包含芯片和其他分立器件。
第二十一方面，本申请实施例提供一种计算机可读介质，其上存储有计算机程序或指令，所述计算机程序或指令被执行时使得计算机执行上述第一方面、或第一方面任一种可能的实现方式中所述的方法。
第二十二方面，本申请实施例提供一种计算机可读介质，其上存储有计算机程序或指令，所述计算机程序或指令被执行时使得计算机执行上述第二方面、或第二方面任一种可能的实现方式中所述的方法。
第二十三方面，本申请实施例提供一种计算机可读介质，其上存储有计算机程序或指令，所述计算机程序或指令被执行时使得计算机执行上述第三方面、或第三方面任一种可能的实现方式中所述的方法。
第二十四方面，本申请实施例提供一种计算机可读介质，其上存储有计算机程序或指令，所述计算机程序或指令被执行时使得计算机执行上述第四方面、或第四方面任一种可能的实现方式中所述的方法。
第二十五方面，本申请实施例提供一种计算机可读介质，其上存储有计算机程序或指令，所述计算机程序或指令被执行时使得计算机执行上述第五方面、或第五方面任一种可能的实现方式中所述的方法。
第二十六方面，本申请实施例提供一种计算机程序产品，其包括计算机程序代码，所述计算机程序代码在计算机上运行时，使得计算机执行上述第一方面、或第一方面任一种可能的实现方式中所述的方法。
第二十七方面，本申请实施例提供一种计算机程序产品，其包括计算机程序代码，所述计算机程序代码在计算机上运行时，使得计算机执行上述第二方面、或第二方面任一种可能的实现方式中所述的方法。
第二十八方面，本申请实施例提供一种计算机程序产品，其包括计算机程序代码，所述计算机程序代码在计算机上运行时，使得计算机执行上述第三方面、或第三方面任一种可能的实现方式中所述的方法。
第二十九方面，本申请实施例提供一种计算机程序产品，其包括计算机程序代码，所述计算机程序代码在计算机上运行时，使得计算机执行上述第四方面、或第四方面任一种可能的实现方式中所述的方法。
第三十方面，本申请实施例提供一种计算机程序产品，其包括计算机程序代码，所述计算机程序代码在计算机上运行时，使得计算机执行上述第五方面、或第五方面任一种可能的实现方式中所述的方法。
第三十一方面，本申请实施例提供一种通信系统。该系统包括上述第六方面和/或第七方面和/或第八方面和/或第九方面和/或第十方面所述的装置，或者该系统包括上述第十一方面和/或第十二方面和/或第十三方面和/或第十四方面和/或第十五方面所述的装置，或者该系统包括上述第十六方面和/或第十七方面和/或第十八方面和/或第十九方面和/或第二十方面所述的芯片系统，或者该系统包括上述第二十一方面和/或第二十二方面和/或第二十三方面和/或第二十四方面和/或第二十五方面所述的计算机可读介质，或者该系统包括上述第二十六方面和/或第二十七方面和/或第二十八方面和/或第二十九方面和/或第三十方面所述的计算机程序产品。
可以理解的，上述提供的任一种通信装置、芯片系统、计算机可读介质、计算机 程序产品或通信系统等均用于执行上文所提供的对应的方法，因此，其所能达到的有益效果可参考对应的方法中的有益效果，此处不再赘述。
附图说明
图1A为一种传输模式的示意图；
图1B为另一种传输模式的示意图；
图1C为另一种传输模式的示意图；
图1D为另一种传输模式的示意图；
图2A为一种通信系统的架构示意图；
图2B为一种5G通信系统的架构示意图；
图3为本申请实施例提供的通信装置的硬件结构示意图；
图4为本申请实施例提供的一种通信方法的流程示意图；
图5为本申请实施例提供的另一种通信方法的流程示意图；
图6为本申请实施例提供的另一种通信方法的流程示意图；
图7为本申请实施例提供的一种通信装置的结构示意图；
图8为本申请实施例提供的另一种通信装置的结构示意图；
图9为本申请实施例提供的另一种通信装置的结构示意图；
图10为本申请实施例提供的一种通信系统的组成示意图。
具体实施方式
通信系统中，在网络侧设备向多个终端(例如，一个多播群组中的终端)发送多播数据的场景中，网络侧设备可以采用单独传输模式向多个终端发送多播数据，也可以采用共享传输模式向多个终端发送多播数据。下面分别对单独传输模式和共享传输模式进行介绍。
1.单独传输模式
网络侧设备采用单独传输模式向多个终端发送多播数据可以指用户面网元获取到多播数据后，采用单独传输模式向接入网设备发送该多播数据，接入网设备接收到该多播数据后，采用单独传输模式向多个终端发送该多播数据。
作为一种示例，网络侧设备采用单独传输模式向多个终端发送多播数据可以如图1A所示。图1A中，用户面网元获取到多播数据后，通过传输通道101、传输通道102和传输通道103分别向接入网设备发送多播数据。接入网设备接收到多播数据后，通过传输通道104、传输通道105和传输通道106分别向终端1、终端2和终端3发送多播数据。
通过以上描述可知，对于单独传输模式，多播数据是通过单独的传输通道(即单独传输通道，如传输通道101或传输通道105)从用户面网元传输到终端的。也就是说，在传输多播数据的过程中，不同的终端对应的传输通道不同，不同的传输通道对应的网络资源也不同。因此通过单独传输模式传输多播数据的过程中占用的网络资源较多。但是，单独传输模式对网络侧设备的要求较低，更容易实现。
本申请中，网络侧设备采用单独传输模式向多个终端发送多播数据还可以理解为：数据网络(data network，DN)向多播用户面网元发送多播数据，该多播数据可以为1 份也可以为多份。多播用户面网元接收到该多播数据后，通过不同的单播会话(例如，传输通道101、传输通道102和传输通道103)向接入网设备发送多播数据。接入网设备接收到多播数据后，通过不同的单播会话(例如，传输通道104、传输通道105和传输通道106)分别向多个终端发送多播数据。
2.共享传输模式
网络侧设备采用共享传输模式向多个终端发送多播数据可以指用户面网元获取到多播数据后，采用共享传输模式向接入网设备发送该多播数据，接入网设备接收到该多播数据后，采用共享传输模式向多个终端发送该多播数据。
作为一种示例，网络侧设备采用共享传输模式向多个终端发送多播数据可以如图1B所示。
图1B中，用户面网元获取到多播数据后，通过传输通道107向接入网设备发送多播数据。接入网设备接收到多播数据后，通过传输通道108向终端1、终端2和终端3发送多播数据。
通过以上描述可知，对于共享传输模式，多播数据是通过共同的传输通道(即共享传输通道，如传输通道107或传输通道108)从用户面网元传输到终端的。也就是说，多个终端可以共用传输通道。因此共享传输模式可以节约网络资源，提高网络资源的利用率。但是，共享传输模式实现起来较为复杂，对网络侧设备的要求较高。
本申请中，网络侧设备采用共享传输模式向多个终端发送多播数据还可以理解为：DN向多播用户面网元发送多播数据，该多播数据可以为1份也可以为多份。多播用户面网元接收到该多播数据后，通过多播会话(例如，传输通道107)向接入网设备发送多播数据。接入网设备接收到多播数据后，通过多播会话(例如，传输通道108)向多个终端发送多播数据。
上述示例中，多播数据在网络侧设备之间(例如，用户面网元与接入网设备之间)的传输模式，与多播数据在空口上(例如，接入网设备与终端之间)的传输模式相同。在具体应用中还可以存在下述情况：多播数据在网络侧设备之间的传输模式，与多播数据在空口上的传输模式不同；或者，在空口上，多播业务的多播群组中的不同终端对应的传输模式不同。也就是说，网络侧设备可以采用混合传输模式向多个终端发送多播数据，这样可以提高多播数据传输的灵活性。可以理解的，混合传输模式包括的情况较多，在多播数据的传输过程中，除了仅通过共同的传输通道传输多播数据，或者仅通过单独的传输通道传输多播数据之外的情况都可以包括在混合传输模式中。本申请实施例仅通过下述两种情况对混合传输模式进行介绍。
3.混合传输模式
情况1：网络侧设备采用混合传输模式向多个终端发送多播数据可以指用户面网元获取到多播数据后，采用共享传输模式向接入网设备发送该多播数据，接入网设备接收到该多播数据后，采用单独传输模式向多个终端发送该多播数据。
作为一种示例，网络侧设备采用混合传输模式向多个终端发送多播数据可以如图1C所示，用户面网元获取到多播数据后，通过传输通道109向接入网设备发送多播数据。接入网设备接收到多播数据后，通过传输通道110、传输通道111和传输通道112分别向终端1、终端2和终端3发送多播数据。
应理解，图1C中，用户面网元通过传输通道109向接入网设备发送的多播数据可以是1份也可以是多份。若用户面网元通过传输通道109向接入网设备发送的多播数据是1份，接入网设备接收到该多播数据后，可以将该多播数据复制多份，通过传输通道110、传输通道111和传输通道112分别向终端1、终端2和终端3发送多播数据。若用户面网元通过传输通道109向接入网设备发送的多播数据是多份，例如3份，接入网设备接收到该多播数据后，不需要复制多播数据，即可以通过传输通道110、传输通道111和传输通道112分别向终端1、终端2和终端3发送多播数据。
情况2：网络侧设备采用混合传输模式向多个终端发送多播数据可以指用户面网元获取到多播数据后，采用共享传输模式向接入网设备发送该多播数据，接入网设备接收到该多播数据后，对一部分终端采用单独传输模式发送多播数据，对另一部分终端采用共享传输模式发送多播数据。
示例性的，如图1D所示，用户面网元获取到多播数据后，通过传输通道113向接入网设备发送多播数据。接入网设备接收到多播数据后，通过传输通道114向终端1发送多播数据，通过传输通道115向终端2和终端3发送多播数据。
应理解，与情况1类似，图1D中，用户面网元通过传输通道113向接入网设备发送的多播数据可以是1份也可以是多份。若用户面网元通过传输通道113向接入网设备发送的多播数据是1份，接入网设备接收到该多播数据后，可以将该多播数据复制多份，通过传输通道114向终端1发送多播数据，通过传输通道115向终端2和终端3发送多播数据。若用户面网元通过传输通道113向接入网设备发送的多播数据是多份，例如2份，接入网设备接收到该多播数据后，不需要复制多播数据，即可以通过传输通道114向终端1发送多播数据，通过传输通道115向终端2和终端3发送多播数据。
需要说明的是，本申请实施例中，传输通道可以替换描述为传输逻辑通道、逻辑通道、通信连接或传输通路等。网络侧设备之间的传输通道，例如传输通道101，还可以替换描述为会话、传输隧道等。空口上的传输通道，例如传输通道104，还可以替换描述为信道等。本申请实施例所述的多播可以替换为广播(broadcast)、组播(multicast)、多播/广播等术语。
综上所述，网络侧设备和终端之间的多播业务的传输模式可以有多种，不同的传输模式的优缺点也不同。目前，网络侧设备都是采用固定的传输模式和终端通信，通信地灵活性差。为了解决这个问题，本申请实施例提供了一种通信方法，该方法中，接入网设备或者移动性管理网元可以确定终端的多播业务的传输模式，并向会话管理网元指示该传输模式，以便会话管理网元根据该传输模式为终端分配用于传输多播数据的资源，可以在实现多播数据传输的同时，提高通信地灵活性。
下面结合附图对本申请实施例的实施方式进行详细描述。
本申请实施例提供的通信方法可应用于图2A所示的通信系统。如图2A所示，该通信系统可以包括多个终端、移动性管理网元、会话管理网元、接入网设备、用户面网元。进一步的，图2A所示通信系统还可以包括DN，DN可以包括应用服务器(application server，AS)。下面对图2A所示架构中涉及的网元或设备进行介绍。
终端，可以是用于实现无线通信功能的设备，例如终端或者可用于终端中的芯片 等。其中，终端可以是第五代(5th generation，5G)通信系统或者未来演进的通信系统中的用户设备(user equipment，UE)、接入终端、终端单元、终端站、移动站、移动台、远方站、远程终端、移动设备、无线通信设备、终端代理或终端装置等。接入终端可以是蜂窝电话、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、个人数字处理(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、车载设备或可穿戴设备，虚拟现实(virtual reality，VR)终端设备、增强现实(augmented reality，AR)终端设备、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)中的无线终端等。终端可以是移动的，也可以是固定的。
接入网设备，主要用于实现物理层功能、资源调度和管理、终端的接入控制以及移动性管理等功能。接入网设备可以为支持有线接入的设备，也可以为支持无线接入的设备。示例性，接入网设备可以为接入网(access network，AN)/无线接入网(radio access network，RAN)，由多个5G-AN/5G-RAN节点组成。5G-AN/5G-RAN节点可以为：接入点(access point，AP)、基站(nodeB，NB)、增强型基站(enhance nodeB，eNB)、下一代基站(NR nodeB，gNB)、传输接收点(transmission reception point，TRP)、传输点(transmission point，TP)或某种其它接入节点等。
移动性管理网元，主要负责终端的接入认证、移动性管理、各个功能网元之间的信令交互等工作，如：对用户的注册状态、用户的连接状态、用户注册入网、跟踪区更新、小区切换用户认证和密钥安全等进行管理。
会话管理网元，主要用于实现用户面传输通道，如协议数据单元(protocol data unit，PDU)会话的建立、释放和更改等会话管理功能。进一步的，会话管理网元可以为单播会话管理网元或多播会话管理网元。单播会话管理网元可以用于实现单播用户面传输通道，单播用户面传输通道可以用于传输单播数据。多播会话管理网元可以用于实现多播用户面传输通道，多播用户面传输通道可以用于传输多播数据。单播会话管理网元和多播会话管理网元可以部署在一个设备或网元中，也可以部署在不同的设备或网元中。
用户面网元，可以作为用户面传输通道上的锚点，用于完成用户面数据的路由转发等功能，如：与终端之间建立通道(即用户面传输通道)，在该通道上转发终端和DN间的数据包、负责对终端的数据报文过滤、数据转发、速率控制、生成计费信息。进一步的，用户面网元可以为单播用户面网元或多播用户面网元。单播用户面网元可以作为单播用户面传输通道上的锚点，用于完成单播用户面数据的路由转发等功能。多播用户面网元可以作为多播用户面传输通道上的锚点，用于完成多播用户面数据的路由转发等功能。单播用户面网元和多播用户面网元可以部署在一个设备或网元中，也可以部署在不同的设备或网元中。
DN，可以为用户提供数据传输服务的运营商网络，如：可以为向用户提供因特网协议(internet protocol，IP)多媒体业务(IP multi-media service，IMS)的运营商网络 等。DN中可以部署有AS，该AS可以向用户提供数据传输服务。
需要说明的是，图2A仅为示例性架构图，除图2A中所示功能单元外，该系统还可以包括其他功能网元，如：策略控制网元、统一数据管理(unified data management，UDM)网元、统一数据存储库(unified data repository，UDR)网元等，本申请实施例对此不进行限定。其中，策略控制网元可以负责向移动性管理网元或会话管理网元提供策略，例如，服务质量(quality of service，QoS)策略、切片选择策略等。UDM网元可以负责用户标识、签约数据、鉴权数据的管理、用户的服务网元注册管理。UDR网元用于UDM存储订阅数据或读取订阅数据以及PCF存储策略数据或者读取策略数据。
需要说明的是，图2A中各个设备的名称不受限制，除图2A所示名称之外，各个设备还可以命名为其他名称，如替换成具备相同或相似功能的网元名称，不予限制。
在图2A所示的通信系统中，终端可以向网络侧设备上报自己的能力，例如终端的无线能力(例如，UE radio capability)、终端的核心网能力(例如，UE MM core network capability)等，以便网络侧设备为终端分配合适的资源，提供更好的服务。除此之外，终端在传输多播数据之前，还可以向网络侧设备请求加入多播业务的多播群组，以便网络侧设备为终端分配多播业务的资源。下面以第一终端为例，分别介绍终端的无线能力上报流程、终端的核心网能力上报流程和终端请求加入多播群组的流程。其中，第一终端可以为多播群组中的任一终端，例如，终端1、终端2或终端n。
一、终端的无线能力上报流程
S11：第一终端向移动性管理网元发送第一请求。
对应的，移动性管理网元接收来自第一终端的第一请求。
其中，第一请求可以是注册请求(registration request)消息，用于请求注册到网络中。
一种可能的实现方式，第一终端在初始注册到网络中的情况下，向移动性管理网元发送第一请求。
S12：移动性管理网元向接入网设备发送第二请求。
对应的，接入网设备接收来自移动性管理网元的第二请求。
其中，第二请求可以包括在N2消息中，用于指示移动性管理网元未存储第一终端的无线能力信息。例如，第二请求可以包括在初始上下文设置消息(initial context setup message)中。
其中，第一终端的无线能力信息可以用于指示第一终端的无线能力，例如，第一终端支持的频谱，或第一终端的耗电等级等。
在一种可能的实现方式中，若移动性管理网元中未存储第一终端的无线能力信息，则移动性管理网元向接入网设备发送第二请求。
可选地，步骤S12替换为：若移动性管理网元中存储了第一终端的无线能力信息，则移动性管理网元向接入网设备发送第一终端的无线能力信息。
S13：接入网设备向第一终端请求第一终端的无线能力。
例如，接入网设备发送用于请求第一终端的无线能力的请求消息，该请求消息可以包括在无线资源控制(radio resource control，RRC)消息中。
一种可能的实现方式，若接入网设备中未存储第一终端的无线能力信息，则接入网设备向第一终端请求第一终端的无线能力。
一种可能的实现方式，若接入网设备中存储了第一终端的无线能力信息，则接入网设备向移动性管理网元发送第一终端的无线能力信息。
S14：第一终端向接入网设备发送第一终端的无线能力信息。
对应的，接入网设备接收来自第一终端的无线能力信息。
其中，第一终端的无线能力信息可以包括在RRC消息中。
一种可能的实现方式，S14之后，接入网设备还可以向移动性管理网元发送第一终端的无线能力信息。
二、终端的核心网能力上报流程
S21：第一终端向移动性管理网元发送第一终端的核心网能力信息。
对应的，移动性管理网元接收来自第一终端的第一终端的核心网能力信息。
其中，第一终端的核心网能力信息可以包括在注册请求消息中。
其中，第一终端的核心网能力信息可以用于指示第一终端支持的核心网的类型。例如，核心网的类型可以为演进分组核心(evolved packet core)网或5G核心网等。
一种可能的实现方式，第一终端在初始注册到网络中的情况下，向移动性管理网元发送第一终端的核心网能力信息。
S22：移动性管理网元向接入网设备发送第一终端的核心网能力信息。
对应的，接入网设备接收来自移动性管理网元的第一终端的核心网能力信息。
其中，第一终端的核心网能力信息可以包括在N2消息中。例如，第一终端的核心网能力信息包括在初始上下文设置消息(initial context setup message)中。
三、终端请求加入多播群组的流程
S31：第一终端向会话管理网元发送第三请求。
对应的，会话管理网元接收来自第一终端的第三请求。
其中，第三请求可以用于请求加入多播业务的多播群组。
一种可能的实现方式，第一终端通过移动性管理网元向会话管理网元发送第三请求。换句话说，第一终端先将第三请求发送给移动性管理网元，移动性管理网元接收到第三请求后，将第三请求发送给会话管理网元。
其中，第三请求可以包括多播群组的标识信息。多播群组的标识信息可以包括多播群组的标识、多播会话的标识或与多播业务相关的协议地址。
其中，多播群组的标识可以用于标识多播群组。具体地，多播群组的标识可以是AS或5G核心网为该多播群组分配的临时标识，例如，临时多播群组标识(temporary multicast group identifier，TMGI)。
需要指出的是，本申请实施例中，多播群组还可以替换为多播会话。多播会话用于传输多播数据。多播会话的标识可以用于指示多播会话。与多播业务相关的协议地址可以是IP地址，例如，多播数据的IP地址，或与AS连接的用户面网元的IP地址。可选的，多播群组的标识信息还可以包括与AS连接的用户面网元的端口号。
一种可能的实现方式，第三请求包括在非接入层(non access stratum，NAS)消息中或用户面的加入请求消息中。其中，NAS消息可以是PDU会话修改请求、PDU会 话建立请求等。用户面的加入请求消息可以是因特网组管理协议(internet group management protocol，IGMP)加入消息(IGMP join message)。
一种可能的实现方式，第一终端的应用触发第一终端向会话管理网元发送第三请求；或者，第一终端检测到需要通过多播的方式接收或发送数据的情况下，向会话管理网元发送第三请求。
S32：会话管理网元向接入网设备发送多播群组的多播信息。
对应的，接入网设备接收来自会话管理网元的多播群组的多播信息。
一种可能的实现方式，会话管理网元通过移动性管理网元向接入网设备发送多播群组的多播信息。
其中，多播群组的多播信息可以用于描述对于多播群组来说，多播业务的需求。在第一终端的多播业务的传输模式为共享传输模式的情况下，网络侧设备可以根据多播群组的多播信息为多播群组分配资源，例如，上述传输通道107或传输通道108。作为一种示例，多播群组的多播信息可以包括多播群组的QoS参数信息。多播群组的QoS参数信息可以包括以下信息中的至少一项：对多播群组的丢包率的要求，对多播群组的时延的要求，多播群组的分配和抢占优先级信息(allocation and retention priority，ARP)，多播群组的最大传输比特率(maximum flow bit rate，MFBR)，或5G QoS标识(5G QoS identifier，5QI)信息。其中，5QI信息用于标识多播群组的QoS参数信息。
进一步的，多播群组的多播信息还可以包括多播群组的标识信息。多播群组的标识信息可以包括多播群组的标识、多播会话的标识或与多播业务相关的协议地址。
需要说明的是，S32中的多播群组的标识信息包括的标识或地址，和S31中的多播群组的标识信息包括的标识或地址可以相同也可以不同。也就是说，会话管理网元接收到第三请求后，可以重新为多播群组分配标识，或者，重新为多播会话分配标识，或者，重新为多播数据分配协议地址。
一种可能的实现方式，多播群组的多播信息是会话管理网元根据多播群组的标识获取的。作为一种示例，多播群组的标识与多播群组的多播信息有对应关系，在这种情况下，会话管理网元可以根据多播群组的标识以及上述对应关系，获取多播群组的多播信息。
进一步可选的，若会话管理网元中存储了多播群组的多播信息，则会话管理网元从本地获取多播群组的多播信息。若会话管理网元中未存储多播群组的多播信息，会话管理网元可以从第一网元上获取多播群组的多播信息，第一网元可以用于管理该多播群组的多播信息。作为一种示例，第一网元可以有以下两种情况：第一种情况，若接收第三请求的是单播会话管理网元，则第一网元可以是多播会话管理网元或UDR。第二种情况，若接收第三请求的是多播会话管理网元，则第一网元可以是UDR网元，UDM网元或策略控制网元。
可选的，会话管理网元向接入网设备发送第一终端的多播信息。进一步的，在第一终端的多播业务的传输模式为单独传输模式、共享传输模式或混合传输模式的情况下，会话管理网元向接入网设备发送第一终端的多播信息。
其中，第一终端的多播信息可以用于描述对于第一终端来说，多播业务的需求。 在第一终端的多播业务的传输模式为单独传输模式的情况下，网络侧设备可以根据第一终端的多播信息为第一终端分配资源，例如，上述传输通道101，或传输通道104等作为一种示例，第一终端的多播信息可以包括第一终端的QoS参数信息。第一终端的QoS参数信息可以指示以下信息中的至少一项：对第一终端的丢包率的要求，对第一终端的时延的要求，第一终端的ARP，第一终端的MFBR，或第一终端的5QI信息。其中，第一终端的5QI信息用于标识第一终端的QoS参数信息。
一种可能的实现方式，第一终端的多播信息可以根据多播群组的多播信息来确定。例如，会话管理网元获取到多播群组的多播信息后，根据多播群组的多播信息，为多播群组中的终端确定该终端的多播信息，使得该终端采用单独传输模式与网络侧设备通信的过程中，网络侧设备可以根据该终端的多播信息为该终端分配资源。可以理解的，第一终端的多播信息和多播群组的多播信息可以同时发送，也可以不同时发送。
可以理解的，图2A所示通信系统可以为3GPP通信系统，如第四代(4th generation，4G)通信系统、长期演进(long term evolution，LTE)系统，又可以为5G通信系统或者新空口(new radio，NR)系统、下一代通信系统等，也可以为非3GPP通信系统，不予限制。
以图2A所示的通信系统为图2B所示的5G通信系统为例，如图2B所示，上述会话管理网元所对应的网元或者实体可以为5G通信系统中的会话管理功能(session management function，SMF)，上述用户面网元所对应的网元或者实体可以为5G通信系统中的用户面功能(user plane function，UPF)，接入网设备对应的网元或者实体可以为5G通信系统中的无线接入网(radio access network，RAN)、移动性管理网元对应的网元或者实体可以为5G通信系统中的接入和移动性管理功能(access and mobility management function，AMF)。
可选的，图2B所示的5G通信系统还包括：策略控制功能(policy control function，PCF)、UDM、UDR等，本申请实施例对此不进行限定。其中，PCF可以对应图2A中的策略控制网元。UDM可以对应图2A中的UDM网元。UDR可以对应图2A中的UDR网元。
可选的，本申请实施例中的接入网设备、终端、会话管理网元以及移动性管理网元也可以称之为通信装置，其可以是一个通用设备或者一个专用设备，本申请实施例对此不作具体限定。
可选的，本申请实施例中的接入网设备、终端、会话管理网元以及移动性管理网元的相关功能可以由一个设备实现，也可以由多个设备共同实现，还可以是由一个设备内的一个或多个功能模块实现，本申请实施例对此不作具体限定。可以理解的是，上述功能既可以是硬件设备中的网络元件，也可以是在专用硬件上运行的软件功能，或者硬件与软件的结合，或者平台(例如，云平台)上实例化的虚拟化功能。
在具体实现时，图2A所示各设备或网元(如接入网设备、终端、会话管理网元以及移动性管理网元等)都可以采用图3所示的组成结构，或者包括图3所示的部件。
图3所示为可适用于本申请实施例的通信装置的硬件结构示意图。该通信装置30包括至少一个处理器301和至少一个通信接口304，用于实现本申请实施例提供的方法。该通信装置30还可以包括通信线路302和存储器303。
处理器301可以是一个通用中央处理器(central processing unit，CPU)，微处理器，特定应用集成电路(application-specific integrated circuit，ASIC)，或一个或多个用于控制本申请方案程序执行的集成电路。
通信线路302可包括一通路，在上述组件之间传送信息，例如总线。
通信接口304，用于与其他设备或通信网络通信。通信接口304可以是任何收发器一类的装置，如可以是以太网接口、无线接入网(radio access network，RAN)接口、无线局域网(wireless local area networks，WLAN)接口、收发器、管脚、总线、或收发电路等。
存储器303可以是只读存储器(read-only memory，ROM)或可存储静态信息和指令的其他类型的静态存储设备，随机存取存储器(random access memory，RAM)或者可存储信息和指令的其他类型的动态存储设备，也可以是电可擦可编程只读存储器(electrically erasable programmable read-only memory，EEPROM)、只读光盘(compact disc read-only memory，CD-ROM)或其他光盘存储、光碟存储(包括压缩光碟、激光碟、光碟、数字通用光碟、蓝光光碟等)、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质，但不限于此。存储器可以是独立存在，通过通信线路302与处理器301相耦合。存储器303也可以和处理器301集成在一起。本申请实施例提供的存储器通常可以具有非易失性。其中，存储器303用于存储执行本申请实施例提供的方案所涉及的计算机执行指令，并由处理器301来控制执行。处理器301用于执行存储器303中存储的计算机执行指令，从而实现本申请实施例提供的方法。
本申请实施例中的计算机执行指令也可以称之为应用程序代码，本申请实施例对此不作具体限定。
本申请实施例中的耦合是装置、单元或模块之间的间接耦合或通信连接，可以是电性，机械或其它的形式，用于装置、单元或模块之间的信息交互。
作为一种实施例，处理器301可以包括一个或多个CPU，例如图3中的CPU0和CPU1。
作为一种实施例，通信装置30可以包括多个处理器，例如图3中的处理器301和处理器307。这些处理器中的每一个可以是一个单核(single-CPU)处理器，也可以是一个多核(multi-CPU)处理器。这里的处理器可以指一个或多个设备、电路、和/或用于处理数据(例如计算机程序指令)的处理核。
作为一种实施例，通信装置30还可以包括输出设备305和/或输入设备306。输出设备305和处理器301耦合，可以以多种方式来显示信息。例如，输出设备305可以是液晶显示器(liquid crystal display，LCD)，发光二级管(light emitting diode，LED)显示设备，阴极射线管(cathode ray tube，CRT)显示设备，或投影仪(projector)等。输入设备306和处理器301耦合，可以以多种方式接收用户的输入。例如，输入设备306可以是鼠标、键盘、触摸屏设备或传感设备等。
可以理解的，图3中示出的组成结构并不构成对该通信装置的限定，除图3所示部件之外，该通信装置可以包括比图示更多或更少的部件，或者组合某些部件，或者不同的部件布置。
下面以图2A所示架构为例，对本申请实施例提供的通信方法进行描述。下述实施例中的各网元可以具备图3所示部件，不予赘述。
需要说明的是，本申请下述实施例中各个网元之间的消息名字或消息中各参数的名字等只是一个示例，具体实现中也可以是其他的名字，本申请实施例对此不作具体限定。
为了便于描述本申请实施例的技术方案，在本申请实施例中，可以采用“第一”、“第二”等字样对功能相同或相似的技术特征进行区分。该“第一”、“第二”等字样并不对数量和执行次序进行限定，并且“第一”、“第二”等字样也并不限定一定不同。在本申请实施例中，“示例性的”或者“例如”等词用于表示例子、例证或说明，被描述为“示例性的”或者“例如”的任何实施例或设计方案不应被解释为比其它实施例或设计方案更优选或更具优势。使用“示例性的”或者“例如”等词旨在以具体方式呈现相关概念，便于理解。
可以理解的，本申请实施例中同一个步骤或者具有相同功能的步骤或者技术特征在不同实施例之间可以互相参考借鉴。
可以理解的，本申请实施例中，接入网设备、终端、会话管理网元或移动性管理网元可以执行本申请实施例中的部分或全部步骤，这些步骤仅是示例，本申请实施例还可以执行其它步骤或者各种步骤的变形。此外，各个步骤可以按照本申请实施例呈现的不同的顺序来执行，并且有可能并非要执行本申请实施例中的全部步骤。
在本申请实施例中，通信方法的执行主体的具体结构，本申请实施例并未特别限定，只要能够实现本申请实施例的提供的方法即可。例如，本申请实施例提供的通信方法的执行主体可以是接入网设备，或者为应用于接入网设备中的部件，例如，芯片，本申请对此不进行限定。或者，本申请实施例提供的通信方法的执行主体可以是终端，或者为应用于终端中的部件，例如，芯片，本申请对此不进行限定。或者，本申请实施例提供的通信方法的执行主体可以是会话管理网元，或者为应用于会话管理网元中的部件，例如，芯片，本申请对此不进行限定。或者，本申请实施例提供的通信方法的执行主体可以是移动性管理网元，或者为应用于移动性管理网元中的部件，例如，芯片，本申请对此不进行限定。下述实施例以通信方法的执行主体分别为接入网设备、终端、会话管理网元、移动性管理网元为例进行描述。
如图4所示，为本申请实施例提供的一种通信方法，该通信方法包括S401-S403。
S401：网络侧设备确定第一终端的多播业务的传输模式。
其中，网络侧设备可以为接入网设备或移动性管理网元，不予限制。例如，网络侧设备可以为图2A中的接入网设备或移动性管理网元。第一终端可以为图2A中的任一终端，如终端1、终端2或终端n。
本申请实施例中，第一终端的多播业务的传输模式可以为单独传输模式，共享传输模式，或混合传输模式。单独传输模式、共享传输模式和混合传输模式的介绍可以参考前文所述。
一种可能的实现方式，网络侧设备根据以下一种或多种信息确定第一终端的多播业务的传输模式：接入网设备的多播/广播业务(multicast/broadcast service，MBS)能力、第一终端的MBS能力信息、多播业务的业务需求或已加入多播业务的终端的数 量。
其中，接入网设备的MBS能力可以表征接入网设备是否支持共享传输模式。第一终端的MBS能力信息可以表征第一终端是否支持共享传输模式。多播业务的业务需求可以包括多播业务是支持或不支持多播传输。例如，若多播业务为视频业务，则多播业务支持多播传输，若多播业务为聊天业务，则多播业务不支持多播传输。已加入多播业务的终端可以指的是已请求加入多播群组，并且核心网设备，例如会话管理网元，接受该请求的终端，或者说，已加入多播业务的终端可以指的是能够接收多播数据的终端，具体可以包括第一终端，也可以不包括该第一终端，不予限制。
下面以下述6种方式为例介绍网络侧设备确定第一终端的多播业务的传输模式的过程。
方式1：网络侧设备根据接入网设备的MBS能力确定第一终端的多播业务的传输模式。
一种可能的实现方式，若接入网设备的MBS能力为接入网设备支持共享传输模式，则网络侧设备确定传输模式为共享传输模式；或者，若接入网设备的MBS能力为接入网设备不支持共享传输模式，则网络侧设备确定传输模式为单独传输模式。
可以理解的，若接入网设备不支持共享传输模式，则接入网设备无法通过共同的传输通道接收发送给多个终端的多播数据，也无法通过共同的传输通道向多个终端发送多播数据。在这种情况下，网络侧设备可以确定传输模式为单独传输模式。若接入网设备支持共享传输模式，则接入网设备可以通过共同的传输通道接收发送给各个终端的多播数据，通过共同的传输通道向各个终端发送多播数据。在这种情况下，网络侧设备可以确定传输模式为共享传输模式。应理解，若接入网设备支持共享传输模式，网络侧设备也可以确定传输模式为混合传输模式或单独传输模式。例如，传输模式可以为上述情况1或情况2中所示的混合传输模式。
方式2：网络侧设备根据接入网设备的MBS能力和第一终端的MBS能力信息，确定第一终端的多播业务的传输模式。
一种可能的实现方式，若接入网设备的MBS能力为接入网设备支持共享传输模式，且第一终端的MBS能力信息表征第一终端支持共享传输模式，则网络侧设备确定传输模式为共享传输模式；或者，若接入网设备的MBS能力为接入网设备不支持共享传输模式，或者第一终端的MBS能力信息表征第一终端不支持共享传输模式，则网络侧设备确定传输模式为单独传输模式。下面分别通过4种情况对方式2进行具体阐述。
情况2.1：接入网设备的MBS能力为接入网设备支持共享传输模式，且第一终端的MBS能力信息表征第一终端支持共享传输模式。
可以理解的，若接入网设备支持共享传输模式，第一终端支持共享传输模式，则接入网设备可以通过共同的传输通道接收发送给多个终端的多播数据，也可以通过共同的传输通道向多个终端发送多播数据，第一终端可以通过共同的传输通道接收来自接入网设备的多播数据。在这种情况下，网络侧设备可以确定传输模式为共享传输模式。应理解，在这种情况下，网络侧设备也可以确定传输模式为混合传输模式或单独传输模式。例如，传输模式可以为上述情况1或情况2中所示的混合传输模式。
情况2.2：接入网设备的MBS能力为接入网设备不支持共享传输模式，且第一终 端的MBS能力信息表征第一终端不支持共享传输模式。
可以理解的，若接入网设备不支持共享传输模式，第一终端不支持共享传输模式，则接入网设备无法通过共同的传输通道接收发送给多个终端的多播数据，也无法通过共同的传输通道向多个终端发送多播数据，第一终端无法通过共同的传输通道接收来自接入网设备的多播数据。在这种情况下，网络侧设备可以确定传输模式为单独传输模式。
情况2.3：接入网设备的MBS能力为接入网设备不支持共享传输模式，且第一终端的MBS能力信息表征第一终端支持共享传输模式。
可以理解的，若接入网设备不支持共享传输模式，第一终端支持共享传输模式，则第一终端可以通过共同的传输通道接收来自接入网设备的多播数据，但是接入网设备无法通过共同的传输通道接收发送给多个终端的多播数据，也无法通过共同的传输通道向多个终端发送多播数据。在这种情况下，网络侧设备可以确定传输模式为单独传输模式。
情况2.4：接入网设备的MBS能力为接入网设备支持共享传输模式，且第一终端的MBS能力信息表征第一终端不支持共享传输模式。
可以理解的，若接入网设备支持共享传输模式，第一终端不支持共享传输模式，则接入网设备可以通过共同的传输通道接收发送给多个终端的多播数据，也可以通过共同的传输通道向多个终端发送多播数据，但是第一终端无法通过共同的传输通道接收来自接入网设备的多播数据。在这种情况下，网络侧设备可以确定传输模式为单独传输模式。应理解，在这种情况下，网络侧设备也可以确定传输模式为混合传输模式。例如，传输模式可以为上述情况1中所示的混合传输模式。
方式3：网络侧设备根据接入网设备的MBS能力、第一终端的MBS能力信息和已加入多播业务的终端的数量，确定第一终端的多播业务的传输模式。
对于方式3，若接入网设备的MBS能力为接入网设备不支持共享传输模式，或者第一终端的MBS能力信息表征第一终端不支持共享传输模式，则网络侧设备可以确定传输模式为单独传输模式。若接入网设备的MBS能力为接入网设备支持共享传输模式，第一终端的MBS能力信息表征第一终端支持共享传输模式，则网络侧设备可以进一步根据已加入多播业务的终端的数量确定传输模式。
其中一种情况，若接入网设备的MBS能力为接入网设备支持共享传输模式，第一终端的MBS能力信息表征第一终端支持共享传输模式，且已加入多播业务的终端的数量大于或等于第一阈值，则网络侧设备确定传输模式为共享传输模式。也就是说，在接入网设备和第一终端都支持共享传输模式的情况下，若加入多播业务的终端的数量较多，则网络侧设备可以确定传输模式为共享传输模式，这样可以节约网络资源，提高网络资源的利用率。
其中另一种情况，若接入网设备的MBS能力为接入网设备支持共享传输模式，第一终端的MBS能力信息表征第一终端支持共享传输模式，且已加入多播业务的终端的数量小于第一阈值，则网络侧设备确定传输模式为单独传输模式。也就是说，在接入网设备和第一终端都支持共享传输模式的情况下，若加入多播业务的终端的数量较少，则网络侧设备可以确定传输模式为单独传输模式，这样可以降低网络侧设备(例 如会话管理网元、接入网设备等)的复杂度，还可以提高第一终端接收多播数据的成功率。
方式4：网络侧设备根据接入网设备的MBS能力和多播业务的业务需求确定第一终端的多播业务的传输模式。
对于方式4，若接入网设备的MBS能力为接入网设备不支持共享传输模式，则网络侧设备可以确定传输模式为单独传输模式。若接入网设备的MBS能力为接入网设备支持共享传输模式，则网络侧设备可以进一步根据多播业务的业务需求确定传输模式。
一种可能的实现方式，若接入网设备的MBS能力为接入网设备支持共享传输模式，且多播业务的业务需求包括多播业务支持多播传输，则网络侧设备确定传输模式为共享传输模式。若接入网设备的MBS能力为接入网设备支持共享传输模式，且多播业务的业务需求包括多播业务不支持多播传输，则网络侧设备确定传输模式为单独传输模式。
方式5：网络侧设备根据接入网设备的MBS能力和已加入多播业务的终端的数量确定第一终端的多播业务的传输模式。
对于方式5，若接入网设备的MBS能力为接入网设备不支持共享传输模式，则网络侧设备可以确定传输模式为单独传输模式。若接入网设备的MBS能力为接入网设备支持共享传输模式，则网络侧设备可以进一步根据已加入多播业务的终端的数量确定传输模式。
一种可能的实现方式，若接入网设备的MBS能力为接入网设备支持共享传输模式，且已加入多播业务的终端的数量大于或等于第一阈值，则网络侧设备确定传输模式为共享传输模式。若接入网设备的MBS能力为接入网设备支持共享传输模式，且已加入多播业务的终端的数量小于第一阈值，则网络侧设备确定传输模式为单独传输模式。
方式6：网络侧设备根据接入网设备的MBS能力、第一终端的MBS能力信息和多播业务的业务需求，确定第一终端的多播业务的传输模式。
对于方式6，若接入网设备的MBS能力为接入网设备不支持共享传输模式，或者第一终端的MBS能力信息表征第一终端不支持共享传输模式，则网络侧设备可以确定传输模式为单独传输模式。若接入网设备的MBS能力为接入网设备支持共享传输模式，第一终端的MBS能力信息表征第一终端支持共享传输模式，则网络侧设备可以进一步根据多播业务的业务需求确定传输模式。
一种可能的实现方式，若接入网设备的MBS能力为接入网设备支持共享传输模式，第一终端的MBS能力信息表征第一终端支持共享传输模式，且多播业务的业务需求包括多播业务支持多播传输，则网络侧设备确定传输模式为共享传输模式。若接入网设备的MBS能力为接入网设备支持共享传输模式，第一终端的MBS能力信息表征第一终端支持共享传输模式，且多播业务的业务需求包括多播业务不支持多播传输，则网络侧设备确定传输模式为单独传输模式。
S402：网络侧设备向会话管理网元发送第一指示信息。
一种可能的实现方式，若网络侧设备为接入网设备，网络侧设备通过移动性管理 网元向会话管理网元发送第一指示信息。例如，网络侧设备可以将第一指示信息包括在N2消息中发送给移动性管理网元，移动性管理网元接收到N2消息后，将第一指示信息包括在N11消息中发送给会话管理网元。若网络侧设备为移动性管理网元，网络侧设备可以向会话管理网元发送N11消息，N11消息包括第一指示信息。
本申请实施例中，会话管理网元可以是图2A所示的会话管理网元。该会话管理网元可以是管理第一终端的多播业务对应的多播会话管理网元，也可以是管理第一终端的PDU会话(如单播会话)的会话管理网元(即单播会话管理网元)。
其中，第一指示信息可以用于指示多播业务的传输模式或者网络侧设备确定的传输模式。第一指示信息可以是一条消息，也可以是包含在消息中的一个信元或一个比特位，不予限制。
本申请实施例中，网络侧设备可以向单播会话管理网元发送第一指示信息，也可以向多播会话管理网元发送第一指示信息。
作为一种示例，若第一指示信息指示传输模式为单独传输模式，则网络侧设备向单播会话管理网元发送第一指示信息，以便单播会话管理网元为第一终端分配资源。或者，若第一指示信息指示传输模式为共享传输模式，则网络侧设备向多播会话管理网元发送第一指示信息，以便多播会话管理网元为第一终端分配资源。可选的，网络侧设备还可以向单播会话管理网元发送第一指示信息，以便单播会话管理网元确定不需要为第一终端分配资源。或者，若第一指示信息指示传输模式为混合传输模式，则网络侧设备向多播会话管理网元和单播会话管理网元发送发送第一指示信息，以便单播会话管理网元或多播会话管理网元为第一终端分配资源。
作为另一种示例，若第一指示信息指示传输模式为共享传输模式，网络侧设备向单播会话管理网元发送第一指示信息。单播会话管理网元接收到第一指示信息后，向多播会话管理网元发送第二指示信息，第二指示信息用于指示传输模式为共享传输模式，以便多播会话管理网元为第一终端分配资源。或者，若第一指示信息指示传输模式为单独传输模式，网络侧设备向多播会话管理网元发送第一指示信息。多播会话管理网元接收到第一指示信息后，向单播会话管理网元发送第三指示信息，第三指示信息用于指示传输模式为单独传输模式，以便单播会话管理网元为第一终端分配资源。
可以理解的，网络侧设备可以通过多种方式向会话管理网元指示多播业务的传输模式。下面以下述3种方式为例进行介绍。
方式1：第一指示信息为传输模式的指示信息。
作为一种示例，第一指示信息的大小为1比特。若第一指示信息的值为“0”，则第一指示信息指示多播业务的传输模式为单独传输模式。若第一指示信息的值为“1”，则第一指示信息指示多播业务的传输模式为共享传输模式，反之亦然。
作为一另种示例，第一指示信息的大小为2比特。若第一指示信息的值为“00”，则第一指示信息指示多播业务的传输模式为单独传输模式。若第一指示信息的值为“01”，则第一指示信息指示多播业务的传输模式为共享传输模式。若第一指示信息的值为“10”，则第一指示信息指示多播业务的传输模式为混合传输模式。
方式2：传输模式分别为单独传输模式和共享传输模式的情况下，包含第一指示信息的消息的消息类型不同。
以第一指示信息包括在消息1中为例，若消息1的类型为单独传输模式对应的消息类型，例如消息1为指示建立单独传输通道的消息，则第一指示信息指示多播业务的传输模式为单独传输模式。若消息1的类型为共享传输模式对应的消息类型，例如消息1为指示建立共享传输通道的消息，则第一指示信息指示多播业务的传输模式为共享传输模式。
进一步的，传输模式分别为单独传输模式、共享传输模式混合传输模式的情况下，包含第一指示信息的消息的消息类型不同。
以第一指示信息包括在消息2中为例，若消息2的类型为单独传输模式对应的消息类型，则第一指示信息指示多播业务的传输模式为单独传输模式。若消息2的类型为共享传输模式对应的消息类型，则第一指示信息指示多播业务的传输模式为共享传输模式。若消息2的类型为混合传输模式对应的消息类型，则第一指示信息指示多播业务的传输模式为混合传输模式。
方式3：传输模式分别为单独传输模式和共享传输模式的情况下，第一指示信息包括的内容不同。
一种可能的实现方式，若传输模式为共享传输模式，第一指示信息包括在共享传输模式下使用的信息，例如，第一指示信息包括以下信息中的至少一项：与多播业务相关的协议地址，共享传输通道的标识，多播群组的标识，多播会话的标识，或多播会话QoS流的标识。若传输模式为单独传输模式，第一指示信息包括在单独传输模式下使用的信息，例如，第一指示信息中不包括上述在共享传输模式下使用的信息，或者，第一指示信息包括单独传输通道的标识。
进一步的，传输模式分别为单独传输模式、共享传输模式混合传输模式的情况下，第一指示信息包括的内容不同。
一种可能的实现方式，若传输模式为共享传输模式，第一指示信息包括在共享传输模式下使用的信息，例如，第一指示信息包括以下信息中的至少一项：与多播业务相关的协议地址，共享传输通道的标识，多播群组的标识，多播会话的标识或多播会话QoS流的标识。若传输模式为单独传输模式，第一指示信息包括在单独传输模式下使用的信息，例如，第一指示信息包括单独传输通道的标识，或者，第一指示信息不包括上述在共享传输模式下使用的信息。若传输模式为混合传输模式，第一指示信息包括在单独传输模式下使用的信息和在共享传输模式下使用的信息，例如，第一指示信息包括单独传输通道的标识和共享传输通道的标识。
对应的，会话管理网元接收来自网络侧设备的第一指示信息。
一种可能的实现方式，会话管理网元根据第一指示信息确定第一终端的多播业务的传输模式。
对于上述S402中的方式1，作为一种示例，若第一指示信息的值为“0”，则会话管理网元确定多播业务的传输模式为单独传输模式。若第一指示信息的值为“1”，则会话管理网元确定多播业务的传输模式为共享传输模式，反之亦然。
作为另一种示例，若第一指示信息的值为“00”，则会话管理网元确定多播业务的传输模式为单独传输模式。若第一指示信息的值为“01”，则会话管理网元确定多播业务的传输模式为共享传输模式。若第一指示信息的值为“10”，则会话管理网元 确定多播业务的传输模式为混合传输模式。
对于上述S402中的方式2，作为一种示例，若消息1的类型为单独传输模式对应的消息类型，则会话管理网元确定多播业务的传输模式为单独传输模式。若消息1的类型为共享传输模式对应的消息类型，会话管理网元确定多播业务的传输模式为共享传输模式。
作为另一种示例，若消息2的类型为单独传输模式对应的消息类型，则会话管理网元确定多播业务的传输模式为单独传输模式。若消息2的类型为共享传输模式对应的消息类型，会话管理网元确定多播业务的传输模式为共享传输模式。若消息2的类型为混合传输模式对应的消息类型，会话管理网元确定多播业务的传输模式为混合传输模式。
对于上述S402中的方式3，作为一种示例，若第一指示信息包括在共享传输模式下使用的信息，则会话管理网元确定多播业务的传输模式为共享传输模式。若第一指示信息包括在单独传输模式下使用的信息，则会话管理网元确定多播业务的传输模式为单独传输模式。
作为另一种示例，若第一指示信息包括在共享传输模式下使用的信息，则会话管理网元确定多播业务的传输为共享传输模式。若第一指示信息包括在单独传输模式下使用的信息，则会话管理网元确定多播业务的传输模式为单独传输模式。若第一指示信息包括在共享传输模式下使用的信息和在单独传输模式下使用的信息，则会话管理网元确定多播业务的传输模式为混合传输模式。
S403：会话管理网元根据第一指示信息，为第一终端分配用于传输多播数据的第一资源。
其中，第一资源可以包括核心网设备之间用于传输多播数据的传输通道，或核心网设备与接入网设备之间用于传输多播数据的传输通道中的至少一个。例如，第一资源包括多播用户面网元与单播用户面网元之间的传输通道，单播用户面网元与接入网设备之间的传输通道，多播用户面网元与接入网设备之间的传输通道中的至少一个。
可以理解的，DN或AS获取到多播数据之后，可以向用户面网元发送该多播数据。用户面网元接收到该多播数据后，可以根据会话管理网元分配的第一资源传输多播数据。该用户面网元可以是单播用户面网元也可以是多播用户面网元。若该用户面网元是单播用户面网元，单播用户面网元接收到该多播数据后，向多播用户面网元发送该多播数据。
下面对第一指示信息分别指示单独传输模式，共享传输模式和混合传输模式的情况下，会话管理网元分配第一资源的过程进行具体阐述。
1、第一指示信息指示传输模式为单独传输模式。
一种可能的实现方式，若第一指示信息指示传输模式为单独传输模式，则会话管理网元建立第一传输通道。第一传输通道用于多播用户面网元与单播用户面网元之间传输多播数据，第一传输通道为单独传输通道或共享传输通道。后续，会话管理网元可以向多播用户面网元和单播用户面网元发送第一传输通道的信息。第一传输通道的信息可以包括第一传输通道的标识。第一传输通道的标识可以是用户面通用分组无线业务(general packet radio service，GPRS)隧道协议(GPRS tunnelling protocol for the  user plane，GTP-U)的标识或隧道端点标识(tunnel endpoint identifier，TEID)。在这种情况下，多播用户面网元接收到多播数据后，可以通过第一传输通道向单播用户面网元发送该多播数据。
进一步可选的，若会话管理网元为单播会话管理网元，则该会话管理网元还可以建立第二传输通道。第二传输通道用于单播用户面网元与接入网设备之间传输多播数据，第二传输通道为单独传输通道，例如第二传输通道可以为图1A中的传输通道101、传输通道102或传输通道103。后续，会话管理网元可以向单播用户面网元和接入网设备发送第二传输通道的信息。第二传输通道的信息可以包括第二传输通道的标识。第二传输通道的标识可以是GTP-U的标识或TEID。在这种情况下，单播用户面网元接收到多播数据后，可以通过第二传输通道向接入网设备发送该多播数据。
可以理解的，若S403之前，会话管理网元已经建立了第二传输通道，例如，会话管理网元通过上述S401-S403为第二终端建立了第二传输通道，则会话管理网元不需要再次建立第二传输通道。其中，第一终端和第二终端都包括在多播群组中，第二终端与第一终端不同。例如，若第一终端为图2A中的终端1，则第二终端可以为图2A中的终端2…或终端n。在这种情况下，会话管理网元可以向单播用户面网元和接入网设备发送第二传输通道的信息，而无需再次建立第二传输通道。
2、第一指示信息指示传输模式为共享传输模式。
一种可能的实现方式，若第一指示信息指示传输模式为共享传输模式，则会话管理网元建立第三传输通道。第三传输通道用于多播用户面网元与接入网设备之间传输多播数据，第三传输通道为共享传输通道，例如，第三传输通道可以为图1B中的传输通道107。后续，会话管理网元向多播用户面网元和接入网设备发送第三传输通道的信息。第三传输通道的信息可以包括第三传输通道的标识，和/或多播群组的多播信息。第三传输通道的标识可以是GTP-U的标识或TEID。在这种情况下，多播用户面网元接收到多播数据后，可以通过第三传输通道向接入网设备发送该多播数据。
3、第一指示信息指示传输模式为混合传输模式。
一种可能的实现方式，若第一指示信息指示传输模式为混合传输模式，则会话管理网元建立第三传输通道，或者，会话管理网元建立第一传输通道和第二传输通道，或者，会话管理网元建立第一传输通道、第二传输通道和第三传输通道。
基于图4所示的方法，网络侧设备可以确定第一终端的多播业务的传输模式，并向会话管理网元指示该传输模式，使得会话管理网元可以为第一终端分配用于传输多播数据的第一资源，可以在实现多播数据传输的同时，提高通信地灵活性。
其中，上述S401-S403中的网络侧设备，会话管理网元或第一终端的动作可以由图3所示的通信装置30中的处理器301调用存储器303中存储的应用程序代码来执行，本申请实施例对此不做任何限制。
下面以网络侧设备分别为接入网设备和移动性管理网元为例，对本申请实施例提供的方法进行阐述。
如图5所示，为本申请实施例提供的又一种通信方法，该通信方法中，接入网设备可以确定第一终端的多播业务的传输模式，并向会话管理网元指示该传输模式，以便会话管理网元根据该传输模式为第一终端分配用于传输多播数据的第一资源，可以 在实现多播数据传输的同时，提高通信地灵活性。该通信方法包括S501-S503。
S501：接入网设备确定第一终端的多播业务的传输模式。
其中，接入网设备可以为图2A中的接入网设备。第一终端可以为图2A中的任一终端，如终端1、终端2或终端n。
一种可能的实现方式，接入网设备在确定第一终端有多播业务需求的情况下，确定第一终端的多播业务的传输模式。示例性的，可以通过终端请求加入多播群组的流程触发接入网设备确定第一终端的多播业务的传输模式。例如，通过上述S31-S32所示的方法触发接入网设备确定第一终端的多播业务的传输模式。也就是说，接入网设备接收到来自会话管理网元的多播群组的多播信息后，确定第一终端的多播业务的传输模式。会话管理网元可以是图2A所示的会话管理网元。该会话管理网元可以是管理第一终端的多播业务对应的多播会话管理网元，还可以是管理第一终端的PDU会话(如单播会话)的会话管理网元(即单播会话管理网元)。
一种可能的实现方式，接入网设备根据以下一种或多种信息确定第一终端的多播业务的传输模式：接入网设备的MBS能力、第一终端的MBS能力信息、多播业务的业务需求或已加入多播业务的终端的数量。这一过程可以参考上述S401中对应的描述。需要说明的是，除了上述S401中对应的描述之外，接入网设备可能无法识别诸如第一终端的MBS能力信息和/或多播群组的多播信息。在这种情况下，接入网设备可以采用单独传输模式与终端或用户面网元通信。
下面对接入网设备获取第一终端的MBS能力信息的过程进行阐述。
一种可能的实现方式，第一终端的MBS能力信息是接入网设备从第一终端或移动性管理网元获取的。移动性管理网元可以是图2A中的移动性管理网元。接入网设备获取到第一终端的MBS能力信息后，可以将该信息存储在本地。
若第一终端的MBS能力信息是接入网设备从第一终端获取的，则接入网设备可以通过终端的无线能力上报流程获取第一终端的MBS能力信息。例如，接入网设备可以通过上述S11-S14所示的方法获取第一终端的MBS能力信息。在这种情况下，第一终端的MBS能力信息可以包括在第一终端的无线能力信息中(例如，S14中，第一终端向接入网设备发送第一终端的无线能力信息，第一终端的无线能力信息包括第一终端的MBS能力信息)；或者，第一终端的MBS能力信息不包括在第一终端的无线能力信息中，而是作为和第一终端的无线能力信息对应的信元同等级的信元发送给接入网设备(例如，S11-S14中的第一终端的无线能力信息可以替换为第一终端的无线能力信息和第一终端的MBS能力信息)；或者，S11-S14中的第一终端的无线能力信息可以替换为第一终端的MBS能力信息。
若第一终端的MBS能力信息是接入网设备从移动性管理网元获取的，则接入网设备可以通过终端的核心网能力上报流程获取第一终端的MBS能力信息。例如，接入网设备可以通过上述S21-S22所示的方法获取第一终端的MBS能力信息。在这种情况下，第一终端的MBS能力信息可以包括在第一终端的核心网能力信息中(例如，S22中，移动性管理网元向接入网设备发送第一终端的核心网能力信息，第一终端的核心网能力信息包括第一终端的MBS能力信息)；或者，第一终端的MBS能力信息不包括在第一终端的核心网能力信息中，而是作为和第一终端的核心网能力信息对应的信 元同等级的信元发送给接入网设备(例如，S21-S22中的第一终端的核心网能力信息可以替换为第一终端的核心网能力信息和第一终端的MBS能力信息)；或者，S21-S22中的第一终端的核心网能力信息可以替换为第一终端的MBS能力信息。
进一步的，若第一终端的MBS能力信息是接入网设备从移动性管理网元获取的，则移动性管理网元可以在确定第一终端请求加入第一终端的多播业务的多播群组的情况下，向接入网设备发送第一终端的MBS能力信息。如此，移动性管理网元可以在接入网设备需要的情况下，向接入网设备发送第一终端的MBS能力信息。
作为一种示例，移动性管理网元可以接收来自第一终端的第一终端的MBS能力信息，通过S32获取多播群组的多播信息，根据多播群组的多播信息确定第一终端请求加入第一终端的多播业务的多播群组。在这种情况下，移动性管理网元可以向接入网设备发送第一终端的MBS能力信息。应理解，若移动性管理网元确定第一终端请求加入第一终端的多播业务的多播群组后，发现之前已经向接入网设备发送过第一终端的MBS能力信息，可以不再次发送，以节省信令开销。
S502：接入网设备向会话管理网元发送第一指示信息。对应的，会话管理网元接收来自接入网设备的第一指示信息。
上述S502的介绍可以参考上述S402中对应的描述。除了上述S402的描述之外，在接入网设备确定传输模式为单独传输模式的情况下，第一指示信息可以包括在拒绝消息(reject message)中。拒绝消息可以用于指示拒绝采用共享传输模式与第一终端通信。示例性的，拒绝消息可以是响应于多播群组的多播信息的，在这种情况下，第一指示信息可以包括原因值。该原因值可以指示接入网设备不能识别或不能解析该多播群组的多播信息，或者指示接入网不能识别或不能解析该多播群组的多播信息的原因。进一步的，在这种情况下，接入网设备不支持共享传输模式。对应的，会话管理网元接收到拒绝消息后，可以确定第一终端的传输模式为单独传输模式。
S503：会话管理网元根据第一指示信息，为第一终端分配用于传输多播数据的第一资源。
上述S503的介绍可以参考上述S403中对应的描述，在此不做赘述。
一种可能的实现方式，S501之后，接入网设备为第一终端分配用于传输多播数据的第二资源。第二资源可以包括接入网设备和第一终端之间用于传输多播数据的传输通道。
示例性的，若第一终端的多播业务的传输模式为单独传输模式，则接入网设备建立第四传输通道。第四传输通道用于接入网设备与第一终端之间传输多播数据，第四传输通道为单独传输通道，例如，若第一终端为图1A中的终端1，则第四传输通道可以是传输通道104。后续，接入网设备可以向第一终端发送第四传输通道的信息。第四传输通道的信息可以包括第二资源对应的频率信息和/或时间信息。在这种情况下，接入网设备接收到多播数据后，可以通过第四传输通道向第一终端发送该多播数据。
示例性的，若第一终端的多播业务的传输模式为共享传输模式，则接入网设备建立第五传输通道。第五传输通道用于接入网设备与第一终端之间传输多播数据，第五传输通道为共享传输通道，例如，第五传输通道可以为图1B中的传输通道108。后续，接入网设备可以向第一终端发送第五传输通道的信息。第五传输通道的信息可以包括 第二资源对应的频率信息和/或时间信息。在这种情况下，接入网设备接收到多播数据后，可以通过第五传输通道向第一终端发送该多播数据。
需要说明的是，在接入网设备为第一终端分配第二资源之前，接入网设备可能已经建立了第五传输通道，例如，接入网设备确定第二终端的多播业务的传输模式为共享传输模式，并且为第二终端建立了第五传输通道，则接入网设备不需要再次建立第五传输通道。其中，第一终端和第二终端都包括在多播群组中，第二终端与第一终端不同。例如，若第一终端为图2A中的终端1，则第二终端可以为图2A中的终端2…或终端n。在这种情况下，接入网设备可以向第一终端发送第五传输通道的信息，而无需再次建立第五传输通道。
示例性的，若第一终端的多播业务的传输模式为混合传输模式，则接入网设备建立第四传输通道或第五传输通道。例如，若第一终端为图1C中的终端2，则接入网设备建立第四传输通道，第四传输通道可以为传输通道111，若第一终端为图1D中的终端2，则接入网设备建立第五传输通道，第五传输通道可以为传输通道115。在这种情况下，接入网设备接收到多播数据后，可以通过第四传输通道或第五传输通道向第一终端发送该多播数据。
基于图5所示的方法，接入网设备可以确定第一终端的多播业务的传输模式，并向会话管理网元指示该传输模式，使得会话管理网元可以为第一终端分配用于传输多播数据的第一资源，可以在实现多播数据传输的同时，提高通信地灵活性。另外，接入网设备知道自己的MBS能力，因此若由接入网设备确定第一终端的多播业务的传输模式，就不需要其他网元向接入网设备指示接入网设备的MBS能力，可以节约信令开销。
其中，上述S501-S503中的接入网设备，移动性管理网元，第一终端或会话管理网元的动作可以由图3所示的通信装置30中的处理器301调用存储器303中存储的应用程序代码来执行，本申请实施例对此不做任何限制。
上述图5所示的方法中，第一终端的多播业务的传输模式是由接入网设备确定的。在这种情况下，其他网元不需要向接入网设备指示接入网设备的MBS能力，可以节约信令开销。在具体应用中，第一终端的多播业务的传输模式也可以由移动性管理网元确定。在这种情况下，移动性管理网元通过现有标准中的信令或消息即可以实现本申请实施例提供的方法，实现起来较为容易。
如图6所示，为本申请实施例提供的又一种通信方法，该通信方法中，移动性管理网元可以确定第一终端的多播业务的传输模式，并向会话管理网元指示该传输模式，以便会话管理网元根据该传输模式为第一终端分配用于传输多播数据的第一资源，可以在实现多播数据传输的同时，提高通信地灵活性。该通信方法包括S601-S603。
S601：移动性管理网元确定第一终端的多播业务的传输模式。
其中，移动性管理网元可以为图2A中的移动性管理网元。第一终端可以为图2A中的任一终端，如终端1、终端2或终端n。
一种可能的实现方式，移动性管理网元在确定第一终端有多播业务需求的情况下，确定第一终端的多播业务的传输模式。示例性的，可以通过终端请求加入多播群组的流程触发移动性管理网元确定第一终端的多播业务的传输模式。例如，通过上述S31- S32所示的方法触发移动性管理网元确定第一终端的多播业务的传输模式。也就是说，移动性管理网元接收到来自第一终端的第三请求后，或者，移动性管理网元接收到来自会话管理网元的多播群组的多播信息后，确定第一终端的多播业务的传输模式。会话管理网元可以是图2A所示的会话管理网元。该会话管理网元可以是管理第一终端的多播业务对应的多播会话管理网元，还可以是管理第一终端的PDU会话(如单播会话)的会话管理网元(即单播会话管理网元)。
一种可能的实现方式，移动性管理网元根据以下一种或多种信息确定第一终端的多播业务的传输模式：接入网设备的MBS能力、第一终端的MBS能力信息、多播业务的业务需求或已加入多播业务的终端的数量。这一过程可以参考上述S401中对应的描述，在此不做赘述。此处对移动性管理网元获取接入网设备的MBS能力的过程，以及获取第一终端的MBS能力信息的过程进行阐述。
一种可能的实现方式，S601之前，移动性管理网元接收来自接入网设备的接入网设备的MBS能力信息。接入网设备可以是图2A中的接入网设备。接入网设备的MBS能力信息可以用于指示接入网设备的MBS能力。进一步的，接入网设备的MBS能力信息包括在NG接口应用协议建立(NGAP setup)消息中。
一种可能的实现方式，S601之前，移动性管理网元接收来自第一终端的第一终端的MBS能力信息。进一步的，第一终端的MBS能力信息包括在注册请求消息中。或者，第一终端的MBS能力信息包括在加入多播业务的多播群组的请求消息中，例如，第一终端的MBS能力信息可以包括在S31的第三请求中，由第一终端发送给移动性管理网元，移动性管理网元接收到第三请求后，可以获取第一终端的MBS能力信息，向会话管理网元发送第三请求。
S602：移动性管理网元向会话管理网元发送第一指示信息。对应的，会话管理网元接收来自移动性管理网元的第一指示信息。
上述S602的介绍可以参考上述S402中对应的描述，在此不再赘述。
S603：会话管理网元根据第一指示信息，为第一终端分配用于传输多播数据的第一资源。
上述S603的介绍可以参考上述S403中对应的描述，在此不做赘述。
一种可能的实现方式，S601之后，移动性管理网元向接入网设备发送第一指示信息，以向接入网设备指示第一终端的多播业务的传输模式。接入网设备接收到该第一指示信息后，可以根据该第一指示信息为第一终端分配用于传输多播数据的第二资源。接入网设备分配第二资源的过程可以参考上述S503中所述。
基于图6所示的方法，移动性管理网元可以确定第一终端的多播业务的传输模式，并向会话管理网元指示该传输模式，使得会话管理网元可以为第一终端分配用于传输多播数据的第一资源，可以在实现多播数据传输的同时，提高通信地灵活性。另外，图6所示方法中的信息，例如，第一指示信息、第三请求、多播群组的多播信息、第一终端的MBS能力信息、接入网设备的MBS能力信息等，可以通过现有标准中的信令或消息传输，对现有标准的修改较小，实现起来较为容易。
其中，上述S601-S603中的接入网设备，移动性管理网元，第一终端或会话管理网元的动作可以由图3所示的通信装置30中的处理器301调用存储器303中存储的 应用程序代码来执行，本申请实施例对此不做任何限制。
上述主要从各个网元之间交互的角度对本申请实施例提供的方案进行了介绍。可以理解的是，上述接入网设备、第一终端、会话管理网元或者移动性管理网元等为了实现上述功能，其包含了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到，结合本文中所公开的实施例描述的各示例的单元及算法操作，本申请能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
本申请实施例可以根据上述方法示例对接入网设备、第一终端、会话管理网元或者移动性管理网元进行功能模块的划分，例如，可以对应各个功能划分各个功能模块，也可以将两个或两个以上的功能集成在一个处理模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。需要说明的是，本申请实施例中对模块的划分是示意性的，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。
比如，以采用集成的方式划分各个功能模块的情况下，图7示出了一种通信装置的结构示意图。该通信装置可以为网络侧设备或者网络侧设备中的芯片或者片上系统，或其他可实现上述网络侧设备功能的组合器件、部件等，该通信装置可以用于执行上述实施例中涉及的网络侧设备的功能。
作为一种可能的实现方式，图7所示的通信装置包括：处理模块701和发送模块702。可选的，图7所示的通信装置还包括：接收模块703。
其中，处理模块701，用于确定第一终端的多播业务的传输模式，传输模式为单独传输模式或共享传输模式，该通信装置为接入网设备或移动性管理网元。例如，结合图4，处理模块701可以用于执行S401。
发送模块702，用于向会话管理网元发送第一指示信息，第一指示信息用于指示多播业务的传输模式。例如，结合图4，发送模块702可以用于执行S402。
一种可能的实现方式，处理模块701，具体用于根据接入网设备的MBS能力确定传输模式，其中，接入网设备的MBS能力为接入网设备是否支持共享传输模式。
一种可能的实现方式，处理模块701，具体用于若接入网设备的MBS能力为接入网设备支持共享传输模式，则确定传输模式为共享传输模式；或者，处理模块701，还具体用于若接入网设备的MBS能力为接入网设备不支持共享传输模式，则确定传输模式为单独传输模式。
一种可能的实现方式，处理模块701，具体用于根据接入网设备的MBS能力和第一终端的MBS能力信息，确定传输模式；或者，处理模块701，具体用于根据接入网设备的MBS能力、第一终端的MBS能力信息和已加入多播业务的终端的数量，确定传输模式；其中，第一终端的MBS能力信息表征第一终端是否支持共享传输模式。
一种可能的实现方式，处理模块701，还具体用于若接入网设备的MBS能力为接入网设备支持共享传输模式，且第一终端的MBS能力信息表征第一终端支持共享传输模式，则确定传输模式为共享传输模式；或者，处理模块701，还具体用于若接入网 设备的MBS能力为接入网设备不支持共享传输模式，或者第一终端的MBS能力信息表征第一终端不支持共享传输模式，则确定传输模式为单独传输模式。
一种可能的实现方式，处理模块701，还具体用于若接入网设备的MBS能力为接入网设备支持共享传输模式，第一终端的MBS能力信息表征第一终端支持共享传输模式，且已加入多播业务的终端的数量大于或等于第一阈值，则确定传输模式为共享传输模式；或者，处理模块701，还具体用于若接入网设备的MBS能力为接入网设备支持共享传输模式，第一终端的MBS能力信息表征第一终端支持共享传输模式，且已加入多播业务的终端的数量小于第一阈值，则确定传输模式为单独传输模式。
一种可能的实现方式，该通信装置为接入网设备，接收模块703，用于接收来自第一终端的第一终端的MBS能力信息。
一种可能的实现方式，第一终端的MBS能力信息包括在第一终端的无线能力信息中。
一种可能的实现方式，该通信装置为接入网设备，接收模块703，用于接收来自移动性管理网元的第一终端的MBS能力信息。
一种可能的实现方式，第一终端的MBS能力信息包括在第一终端的核心网能力信息中。
一种可能的实现方式，该通信装置为接入网设备，处理模块701确定传输模式为单独传输模式，第一指示信息包括在拒绝消息中，拒绝消息用于指示拒绝采用共享传输模式与第一终端通信。
一种可能的实现方式，该通信装置为接入网设备，接收模块703，用于接收来自会话管理网元的多播群组的多播信息，多播群组的多播信息用于指示多播业务的要求。
一种可能的实现方式，该通信装置为移动性管理网元，接收模块703，还用于接收来自接入网设备的接入网设备的MBS能力信息，接入网设备的MBS能力信息用于指示接入网设备的MBS能力。
一种可能的实现方式，接入网设备的MBS能力信息包括在NG接口应用协议建立消息中。
一种可能的实现方式，该通信装置为移动性管理网元，接收模块703，用于接收来自第一终端的第一终端的MBS能力信息。
一种可能的实现方式，第一终端的MBS能力信息包括在注册请求消息中，或者，第一终端的MBS能力信息包括在加入多播业务的多播群组的请求消息中。
其中，上述方法实施例涉及的各操作的所有相关内容均可以援引到对应功能模块的功能描述，在此不再赘述。
在本实施例中，该通信装置以采用集成的方式划分各个功能模块的形式来呈现。这里的“模块”可以指特定ASIC，电路，执行一个或多个软件或固件程序的处理器和存储器，集成逻辑电路，和/或其他可以提供上述功能的器件。在一个简单的实施例中，本领域的技术人员可以想到该通信装置可以采用图3所示的形式。
比如，图3中的处理器301可以通过调用存储器303中存储的计算机执行指令，使得通信装置执行上述方法实施例中的通信方法。
示例性的，图7中的处理模块701、发送模块702和接收模块703的功能/实现过 程可以通过图3中的处理器301调用存储器303中存储的计算机执行指令来实现。或者，图7中的处理模块701的功能/实现过程可以通过图3中的处理器301调用存储器303中存储的计算机执行指令来实现，图7中的发送模块702和接收模块703的功能/实现过程可以通过图3中的通信接口304来实现。
由于本实施例提供的通信装置可执行上述的通信方法，因此其所能获得的技术效果可参考上述方法实施例，在此不再赘述。
比如，以采用集成的方式划分各个功能模块的情况下，图8示出了一种通信装置的结构示意图。该通信装置可以为会话管理网元或者会话管理网元中的芯片或者片上系统，或其他可实现上述会话管理网元功能的组合器件、部件等，该通信装置可以用于执行上述实施例中涉及的会话管理网元的功能。
作为一种可能的实现方式，图8所示的通信装置包括：接收模块801和处理模块802。
其中，接收模块801，用于接收来自网络侧设备的第一指示信息，网络侧设备为接入网设备或移动性管理网元，第一指示信息用于指示第一终端的多播业务的传输模式，传输模式为单独传输模式或共享传输模式。例如，结合图4，接收模块801用于执行S402。
处理模块802，用于根据第一指示信息，为第一终端分配用于传输多播数据的第一资源。例如，结合图4，处理模块802用于执行S403。
一种可能的实现方式，第一指示信息指示传输模式为单独传输模式，处理模块802，具体用于建立第一传输通道，第一传输通道用于多播用户面网元与单播用户面网元之间传输数据。
一种可能的实现方式，该通信装置为单播会话管理网元，处理模块802，还具体用于建立第二传输通道，第二传输通道用于单播用户面网元与接入网设备之间传输多播数据。
一种可能的实现方式，第一指示信息指示传输模式为共享传输模式，处理模块802，具体用于建立第三传输通道，第三传输通道用于多播用户面网元与接入网设备之间传输多播数据。
其中，上述方法实施例涉及的各操作的所有相关内容均可以援引到对应功能模块的功能描述，在此不再赘述。
在本实施例中，该通信装置以采用集成的方式划分各个功能模块的形式来呈现。这里的“模块”可以指特定ASIC，电路，执行一个或多个软件或固件程序的处理器和存储器，集成逻辑电路，和/或其他可以提供上述功能的器件。在一个简单的实施例中，本领域的技术人员可以想到该通信装置可以采用图8所示的形式。
比如，图3中的处理器301可以通过调用存储器303中存储的计算机执行指令，使得通信装置执行上述方法实施例中的通信方法。
示例性的，图8中的接收模块801和处理模块802的功能/实现过程可以通过图3中的处理器301调用存储器303中存储的计算机执行指令来实现。或者，图8中的处理模块802的功能/实现过程可以通过图3中的处理器301调用存储器303中存储的计算机执行指令来实现，图8中的接收模块801的功能/实现过程可以通过图3中的通信 接口304来实现。
由于本实施例提供的通信装置可执行上述的通信方法，因此其所能获得的技术效果可参考上述方法实施例，在此不再赘述。
比如，以采用集成的方式划分各个功能模块的情况下，图9示出了一种通信装置的结构示意图。图9所示的通信装置包括：处理模块901和发送模块902。
作为一种可能的实现方式，该通信装置可以为第一终端或者第一终端中的芯片或者片上系统，或其他可实现上述第一终端功能的组合器件、部件等，该通信装置可以用于执行上述实施例中涉及的第一终端的功能。
其中，处理模块901，用于获取通信装置的MBS能力信息，其中，通信装置的MBS能力信息表征通信装置是否支持共享传输模式。
发送模块902，用于向网络侧设备发送通信装置的MBS能力信息，网络侧设备为接入网设备或移动性管理网元。
一种可能的实现方式，若网络侧设备为接入网设备，通信装置的MBS能力信息包括在通信装置的无线能力信息中。
一种可能的实现方式，若网络侧设备为移动性管理网元，通信装置的MBS能力信息包括在注册请求消息中，或者，通信装置的MBS能力信息包括在加入通信装置的多播业务的多播群组的请求消息中。
作为一种可能的实现方式，该通信装置可以为移动性管理网元或者移动性管理网元中的芯片或者片上系统，或其他可实现上述移动性管理网元功能的组合器件、部件等，该通信装置可以用于执行上述实施例中涉及的移动性管理网元的功能。
其中，处理模块901，用于获取第一终端的MBS能力信息，其中，第一终端的MBS能力信息表征第一终端是否支持共享传输模式。
发送模块902，用于向接入网设备发送第一终端的MBS能力信息。
一种可能的实现方式，处理模块901，还用于确定第一终端请求加入第一终端的多播业务的多播群组。
一种可能的实现方式，第一终端的MBS能力信息包括在第一终端的核心网能力信息中。
作为一种可能的实现方式，该通信装置可以为接入网设备或者接入网设备中的芯片或者片上系统，或其他可实现上述接入网设备功能的组合器件、部件等，该通信装置可以用于执行上述实施例中涉及的接入网设备的功能。
其中，处理模块901，用于获取通信装置的MBS能力信息，其中，通信装置的MBS能力信息用于指示通信装置的MBS能力，通信装置的MBS能力为通信装置是否支持共享传输模式。
发送模块902，用于向移动性管理网元发送通信装置的MBS能力信息。
一种可能的实现方式，通信装置的MBS能力信息包括在NG接口应用协议建立消息中。
其中，上述方法实施例涉及的各操作的所有相关内容均可以援引到对应功能模块的功能描述，在此不再赘述。
在本实施例中，该通信装置以采用集成的方式划分各个功能模块的形式来呈现。 这里的“模块”可以指特定ASIC，电路，执行一个或多个软件或固件程序的处理器和存储器，集成逻辑电路，和/或其他可以提供上述功能的器件。在一个简单的实施例中，本领域的技术人员可以想到该通信装置可以采用图3所示的形式。
比如，图3中的处理器301可以通过调用存储器303中存储的计算机执行指令，使得通信装置执行上述方法实施例中的通信方法。
示例性的，图9中的处理模块901和发送模块902的功能/实现过程可以通过图3中的处理器301调用存储器303中存储的计算机执行指令来实现。或者，图9中的处理模块901的功能/实现过程可以通过图3中的处理器301调用存储器303中存储的计算机执行指令来实现，图9中的发送模块902的功能/实现过程可以通过图3中的通信接口304来实现。
由于本实施例提供的通信装置可执行上述的通信方法，因此其所能获得的技术效果可参考上述方法实施例，在此不再赘述。
图10为本申请实施例提供的一种通信系统的组成示意图，如图10所示，该通信系统可以包括终端1001、接入网设备1002、会话管理网元1003和移动性管理网元1004。
在一种可能的实现方式中，终端1001可以用于执行上述图5所示方法中涉及的第一终端的功能。接入网设备1002可以用于执行上述图5所示方法中涉及的接入网设备的功能。会话管理网元1003可以用于执行上述图5所示方法中涉及的会话管理网元的功能。移动性管理网元1004可以用于执行上述图5所示方法中涉及的移动性管理网元的功能。
例如，接入网设备1002可以确定终端1001的多播业务的传输模式，通过移动性管理网元1004向会话管理网元1003发送第一指示信息。会话管理网元1003可以通过移动性管理网元1004接收来自接入网设备1002的第一指示信息，根据第一指示信息，为终端1001分配用于传输多播数据的第一资源。
在另一种可能的实现方式中，终端1001可以用于执行上述图6所示方法中涉及的第一终端的功能。接入网设备1002可以用于执行上述图6所示方法中涉及的接入网设备的功能。会话管理网元1003可以用于执行上述图6所示方法中涉及的会话管理网元的功能。移动性管理网元1004可以用于执行上述图6所示方法中涉及的移动性管理网元的功能。
例如，移动性管理网元1004可以确定终端1001的多播业务的传输模式，向会话管理网元1003发送第一指示信息。会话管理网元1003可以接收来自移动性管理网元1004的第一指示信息，根据第一指示信息，为终端1001分配用于传输多播数据的第一资源。
具体的，图10中各个网元的执行过程可参照图5或图6所示方法中对应网元的执行步骤，不予赘述。
本申请实施例还提供了一种计算机可读介质。上述方法实施例中的全部或者部分流程可以由计算机程序来指令相关的硬件完成，该程序可存储于上述计算机可读介质中，该程序在执行时，可包括如上述各方法实施例的流程。计算机可读介质可以是前述任一实施例的通信装置，如：包括发送端和/或接收端的内部存储单元，例如通信装 置的硬盘或内存。上述计算机可读介质也可以是上述通信装置的外部存储设备，例如上述通信装置上配备的插接式硬盘，智能存储卡(smart media card，SMC)，安全数字(secure digital，SD)卡，闪存卡(flash card)等。进一步地，上述计算机可读介质还可以既包括上述通信装置的内部存储单元也包括外部存储设备。上述计算机可读介质用于存储上述计算机程序以及上述通信装置所需的其他程序和数据。上述计算机可读介质还可以用于暂时地存储已经输出或者将要输出的数据。
本申请实施例还提供了一种计算机程序产品。上述方法实施例中的全部或者部分流程可以由计算机程序来指令相关的硬件完成，该程序可存储于上述计算机程序产品中，该程序在执行时，可包括如上述各方法实施例的流程。
本申请实施例还提供了一种计算机指令。上述方法实施例中的全部或者部分流程可以由计算机指令来指令相关的硬件(如计算机、处理器、接入网设备、移动性管理网元或会话管理网元等)完成。该程序可被存储于上述计算机可读介质中或上述计算机程序产品中。
通过以上的实施方式的描述，所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，仅以上述各功能模块的划分进行举例说明，具体应用中，可以根据需要而将上述功能分配由不同的功能模块完成，即将装置的内部结构划分成不同的功能模块，以完成以上描述的全部或者部分功能。
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仅是示意性的，例如，所述模块或单元的划分，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装置，或一些特征可以忽略，或不执行。另一点，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。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是一个物理单元或多个物理单元，即可以位于一个地方，或者也可以分布到多个不同地方。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个可读取存储介质中。基于这样的理解，本申请实施例的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该软件产品存储在一个存储介质中，包括若干指令用以使得一个设备(可以是单片机，芯片等)或处理器(processor)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、ROM、RAM、磁碟或者光盘等各种可以存储程序代码的介质。
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，任何在本申请揭露的技术范围内的变化或替换，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。

Claims (58)

  1. 一种通信方法，其特征在于，所述方法包括：
    网络侧设备确定第一终端的多播业务的传输模式，所述传输模式为单独传输模式或共享传输模式，所述网络侧设备为接入网设备或移动性管理网元；
    所述网络侧设备向会话管理网元发送第一指示信息，所述第一指示信息用于指示所述多播业务的传输模式。
  2. 根据权利要求1所述的方法，其特征在于，所述网络侧设备确定第一终端的多播业务的传输模式，包括：
    所述网络侧设备根据所述接入网设备的多播/广播业务MBS能力确定所述传输模式，其中，所述接入网设备的MBS能力为所述接入网设备是否支持共享传输模式。
  3. 根据权利要求2所述的方法，其特征在于，所述网络侧设备根据所述接入网设备的MBS能力确定所述传输模式，包括：
    若所述接入网设备的MBS能力为所述接入网设备支持共享传输模式，则所述网络侧设备确定所述传输模式为共享传输模式；或者，
    若所述接入网设备的MBS能力为所述接入网设备不支持共享传输模式，则所述网络侧设备确定所述传输模式为单独传输模式。
  4. 根据权利要求2所述的方法，其特征在于，所述网络侧设备根据所述接入网设备的MBS能力确定所述传输模式，包括：
    所述网络侧设备根据所述接入网设备的MBS能力和所述第一终端的MBS能力信息，确定所述传输模式；或者，
    所述网络侧设备根据所述接入网设备的MBS能力、所述第一终端的MBS能力信息和已加入所述多播业务的终端的数量，确定所述传输模式；
    其中，所述第一终端的MBS能力信息表征所述第一终端是否支持共享传输模式。
  5. 根据权利要求4所述的方法，其特征在于，所述网络侧设备根据所述接入网设备的MBS能力和所述第一终端的MBS能力信息，确定所述传输模式，包括：
    若所述接入网设备的MBS能力为所述接入网设备支持共享传输模式，且所述第一终端的MBS能力信息表征所述第一终端支持共享传输模式，则所述网络侧设备确定所述传输模式为共享传输模式；或者，
    若所述接入网设备的MBS能力为所述接入网设备不支持共享传输模式，或者所述第一终端的MBS能力信息表征所述第一终端不支持共享传输模式，则所述网络侧设备确定所述传输模式为单独传输模式。
  6. 根据权利要求4所述的方法，其特征在于，所述网络侧设备根据所述接入网设备的MBS能力、所述第一终端的MBS能力信息和已加入所述多播业务的终端的数量，确定所述传输模式，包括：
    若所述接入网设备的MBS能力为所述接入网设备支持共享传输模式，所述第一终端的MBS能力信息表征所述第一终端支持共享传输模式，且所述已加入所述多播业务的终端的数量大于或等于第一阈值，则所述网络侧设备确定所述传输模式为共享传输模式；或者，
    若所述接入网设备的MBS能力为所述接入网设备支持共享传输模式，所述第一终端的MBS能力信息表征所述第一终端支持共享传输模式，且所述已加入所述多播业务的终端的数量小于第一阈值，则所述网络侧设备确定所述传输模式为单独传输模式。
  7. 根据权利要求4-6中任一项所述的方法，其特征在于，所述网络侧设备为所述接入网设备，所述方法还包括：
    所述网络侧设备接收来自所述第一终端的所述第一终端的MBS能力信息。
  8. 根据权利要求7所述的方法，其特征在于，所述第一终端的MBS能力信息包括在所述第一终端的无线能力信息中。
  9. 根据权利要求4-6中任一项所述的方法，其特征在于，所述网络侧设备为所述接入网设备，所述方法还包括：
    所述网络侧设备接收来自移动性管理网元的所述第一终端的MBS能力信息。
  10. 根据权利要求9所述的方法，其特征在于，所述第一终端的MBS能力信息包括在所述第一终端的核心网能力信息中。
  11. 根据权利要求1-10中任一项所述的方法，其特征在于，所述网络侧设备为所述接入网设备，所述网络侧设备确定所述传输模式为单独传输模式，所述第一指示信息包括在拒绝消息中，所述拒绝消息用于指示拒绝采用共享传输模式与所述第一终端通信。
  12. 根据权利要求1-11中任一项所述的方法，其特征在于，所述网络侧设备为所述接入网设备，所述方法还包括：
    所述网络侧设备接收来自所述会话管理网元的多播群组的多播信息，所述多播群组的多播信息用于指示所述多播业务的要求。
  13. 根据权利要求1-6中任一项所述的方法，其特征在于，所述网络侧设备为所述移动性管理网元，所述方法还包括：
    所述网络侧设备接收来自所述接入网设备的所述接入网设备的MBS能力信息，所述接入网设备的MBS能力信息用于指示所述接入网设备的MBS能力。
  14. 根据权利要求13所述的方法，其特征在于，所述接入网设备的MBS能力信息包括在NG接口应用协议建立消息中。
  15. 根据权利要求1-6、或13-14中任一项所述的方法，其特征在于，所述网络侧设备为所述移动性管理网元，所述方法还包括：
    所述网络侧设备接收来自所述第一终端的所述第一终端的MBS能力信息。
  16. 根据权利要求15所述的方法，其特征在于，所述第一终端的MBS能力信息包括在注册请求消息中，或者，所述第一终端的MBS能力信息包括在加入所述多播业务的多播群组的请求消息中。
  17. 一种通信方法，其特征在于，所述方法包括：
    会话管理网元接收来自网络侧设备的第一指示信息，所述网络侧设备为接入网设备或移动性管理网元，所述第一指示信息用于指示第一终端的多播业务的传输模式，所述传输模式为单独传输模式或共享传输模式；
    所述会话管理网元根据所述第一指示信息，为所述第一终端分配用于传输所述多 播业务的数据的第一资源。
  18. 根据权利要求17所述的方法，其特征在于，所述第一指示信息指示所述传输模式为单独传输模式，所述会话管理网元根据所述第一指示信息，为所述第一终端分配用于传输所述多播业务的数据的第一资源，包括：
    所述会话管理网元建立第一传输通道，所述第一传输通道用于多播用户面网元与单播用户面网元之间传输所述数据。
  19. 根据权利要求18所述的方法，其特征在于，所述会话管理网元为单播会话管理网元，
    所述会话管理网元根据所述第一指示信息，为所述第一终端分配用于传输所述多播业务的数据的第一资源，还包括：
    所述会话管理网元建立第二传输通道，所述第二传输通道用于所述单播用户面网元与所述接入网设备之间传输所述多播业务的数据。
  20. 根据权利要求17所述的方法，其特征在于，所述第一指示信息指示所述传输模式为共享传输模式，所述会话管理网元根据所述第一指示信息，为所述第一终端分配用于传输所述多播业务的数据的第一资源，包括：
    所述会话管理网元建立第三传输通道，所述第三传输通道用于多播用户面网元与所述接入网设备之间传输所述多播业务的数据。
  21. 一种通信方法，其特征在于，所述方法包括：
    第一终端获取所述第一终端的多播/广播业务MBS能力信息，其中，所述第一终端的MBS能力信息表征所述第一终端是否支持共享传输模式；
    所述第一终端向网络侧设备发送所述第一终端的MBS能力信息，所述网络侧设备为接入网设备或移动性管理网元。
  22. 根据权利要求21所述的方法，其特征在于，若所述网络侧设备为接入网设备，所述第一终端的MBS能力信息包括在所述第一终端的无线能力信息中。
  23. 根据权利要求22所述的方法，其特征在于，若所述网络侧设备为移动性管理网元，所述第一终端的MBS能力信息包括在注册请求消息中，或者，所述第一终端的MBS能力信息包括在加入所述第一终端的多播业务的多播群组的请求消息中。
  24. 一种通信方法，其特征在于，所述方法包括：
    移动性管理网元获取第一终端的多播/广播业务MBS能力信息，其中，所述第一终端的MBS能力信息表征所述第一终端是否支持共享传输模式；
    所述移动性管理网元向接入网设备发送所述第一终端的MBS能力信息。
  25. 根据权利要求24所述的方法，其特征在于，在所述移动性管理网元向接入网设备发送所述第一终端的MBS能力信息之前，所述方法还包括：
    所述移动性管理网元确定所述第一终端请求加入所述第一终端的多播业务的多播群组。
  26. 根据权利要求24或25所述的方法，其特征在于，所述第一终端的MBS能力信息包括在所述第一终端的核心网能力信息中。
  27. 一种通信方法，其特征在于，所述方法包括：
    接入网设备获取所述接入网设备的多播/广播业务MBS能力信息，其中，所述接 入网设备的MBS能力信息用于指示所述接入网设备的MBS能力，所述接入网设备的MBS能力为所述接入网设备是否支持共享传输模式；
    所述接入网设备向移动性管理网元发送所述接入网设备的MBS能力信息。
  28. 根据权利要求27所述的方法，其特征在于，所述接入网设备的MBS能力信息包括在NG接口应用协议建立消息中。
  29. 一种通信装置，其特征在于，所述通信装置包括：处理模块和发送模块；
    所述处理模块，用于确定第一终端的多播业务的传输模式，所述传输模式为单独传输模式或共享传输模式，所述通信装置为接入网设备或移动性管理网元；
    所述发送模块，用于向会话管理网元发送第一指示信息，所述第一指示信息用于指示所述多播业务的传输模式。
  30. 根据权利要求29所述的通信装置，其特征在于，
    所述处理模块，具体用于根据所述接入网设备的多播/广播业务MBS能力确定所述传输模式，其中，所述接入网设备的MBS能力为所述接入网设备是否支持共享传输模式。
  31. 根据权利要求30所述的通信装置，其特征在于，
    所述处理模块，具体用于若所述接入网设备的MBS能力为所述接入网设备支持共享传输模式，则确定所述传输模式为共享传输模式；或者，
    所述处理模块，还具体用于若所述接入网设备的MBS能力为所述接入网设备不支持共享传输模式，则确定所述传输模式为单独传输模式。
  32. 根据权利要求30所述的通信装置，其特征在于，
    所述处理模块，具体用于根据所述接入网设备的MBS能力和所述第一终端的MBS能力信息，确定所述传输模式；或者，
    所述处理模块，具体用于根据所述接入网设备的MBS能力、所述第一终端的MBS能力信息和已加入所述多播业务的终端的数量，确定所述传输模式；
    其中，所述第一终端的MBS能力信息表征所述第一终端是否支持共享传输模式。
  33. 根据权利要求32所述的通信装置，其特征在于，
    所述处理模块，还具体用于若所述接入网设备的MBS能力为所述接入网设备支持共享传输模式，且所述第一终端的MBS能力信息表征所述第一终端支持共享传输模式，则确定所述传输模式为共享传输模式；或者，
    所述处理模块，还具体用于若所述接入网设备的MBS能力为所述接入网设备不支持共享传输模式，或者所述第一终端的MBS能力信息表征所述第一终端不支持共享传输模式，则确定所述传输模式为单独传输模式。
  34. 根据权利要求32所述的通信装置，其特征在于，
    所述处理模块，还具体用于若所述接入网设备的MBS能力为所述接入网设备支持共享传输模式，所述第一终端的MBS能力信息表征所述第一终端支持共享传输模式，且所述已加入所述多播业务的终端的数量大于或等于第一阈值，则确定所述传输模式为共享传输模式；或者，
    所述处理模块，还具体用于若所述接入网设备的MBS能力为所述接入网设备支 持共享传输模式，所述第一终端的MBS能力信息表征所述第一终端支持共享传输模式，且所述已加入所述多播业务的终端的数量小于第一阈值，则确定所述传输模式为单独传输模式。
  35. 根据权利要求32-34中任一项所述的通信装置，其特征在于，所述通信装置为所述接入网设备，所述通信装置还包括：接收模块；
    所述接收模块，用于接收来自所述第一终端的所述第一终端的MBS能力信息。
  36. 根据权利要求35所述的通信装置，其特征在于，所述第一终端的MBS能力信息包括在所述第一终端的无线能力信息中。
  37. 根据权利要求32-34中任一项所述的通信装置，其特征在于，所述通信装置为所述接入网设备，所述通信装置还包括：接收模块；
    所述接收模块，用于接收来自移动性管理网元的所述第一终端的MBS能力信息。
  38. 根据权利要求37所述的通信装置，其特征在于，所述第一终端的MBS能力信息包括在所述第一终端的核心网能力信息中。
  39. 根据权利要求29-38中任一项所述的通信装置，其特征在于，所述通信装置为所述接入网设备，所述处理模块确定所述传输模式为单独传输模式，所述第一指示信息包括在拒绝消息中，所述拒绝消息用于指示拒绝采用共享传输模式与所述第一终端通信。
  40. 根据权利要求29-39中任一项所述的通信装置，其特征在于，所述通信装置为所述接入网设备，所述通信装置还包括：接收模块；
    所述接收模块，用于接收来自所述会话管理网元的多播群组的多播信息，所述多播群组的多播信息用于指示所述多播业务的要求。
  41. 根据权利要求29-34中任一项所述的通信装置，其特征在于，所述通信装置为所述移动性管理网元，所述通信装置还包括：接收模块；
    所述接收模块，还用于接收来自所述接入网设备的所述接入网设备的MBS能力信息，所述接入网设备的MBS能力信息用于指示所述接入网设备的MBS能力。
  42. 根据权利要求41所述的通信装置，其特征在于，所述接入网设备的MBS能力信息包括在NG接口应用协议建立消息中。
  43. 根据权利要求29-34、或41-42中任一项所述的通信装置，其特征在于，所述通信装置为所述移动性管理网元，所述通信装置还包括：接收模块；
    所述接收模块，用于接收来自所述第一终端的所述第一终端的MBS能力信息。
  44. 根据权利要求43所述的通信装置，其特征在于，所述第一终端的MBS能力信息包括在注册请求消息中，或者，所述第一终端的MBS能力信息包括在加入所述多播业务的多播群组的请求消息中。
  45. 一种通信装置，其特征在于，所述通信装置包括：接收模块和处理模块；
    所述接收模块，用于接收来自网络侧设备的第一指示信息，所述网络侧设备为接入网设备或移动性管理网元，所述第一指示信息用于指示第一终端的多播业务的传输模式，所述传输模式为单独传输模式或共享传输模式；
    所述处理模块，用于根据所述第一指示信息，为所述第一终端分配用于传输所述 多播业务的数据的第一资源。
  46. 根据权利要求45所述的通信装置，其特征在于，所述第一指示信息指示所述传输模式为单独传输模式，
    所述处理模块，具体用于建立第一传输通道，所述第一传输通道用于多播用户面网元与单播用户面网元之间传输所述数据。
  47. 根据权利要求46所述的通信装置，其特征在于，所述通信装置为单播会话管理网元，
    所述处理模块，还具体用于建立第二传输通道，所述第二传输通道用于所述单播用户面网元与所述接入网设备之间传输所述多播业务的数据。
  48. 根据权利要求45所述的通信装置，其特征在于，所述第一指示信息指示所述传输模式为共享传输模式，
    所述处理模块，具体用于建立第三传输通道，所述第三传输通道用于多播用户面网元与所述接入网设备之间传输所述多播业务的数据。
  49. 一种通信装置，其特征在于，所述通信装置包括：处理模块和发送模块；
    所述处理模块，用于获取所述通信装置的多播/广播业务MBS能力信息，其中，所述通信装置的MBS能力信息表征所述通信装置是否支持共享传输模式；
    所述发送模块，用于向网络侧设备发送所述通信装置的MBS能力信息，所述网络侧设备为接入网设备或移动性管理网元。
  50. 根据权利要求49所述的通信装置，其特征在于，若所述网络侧设备为接入网设备，所述通信装置的MBS能力信息包括在所述通信装置的无线能力信息中。
  51. 根据权利要求50所述的通信装置，其特征在于，若所述网络侧设备为移动性管理网元，所述通信装置的MBS能力信息包括在注册请求消息中，或者，所述通信装置的MBS能力信息包括在加入所述通信装置的多播业务的多播群组的请求消息中。
  52. 一种通信装置，其特征在于，所述通信装置包括：处理模块和发送模块；
    所述处理模块，用于获取第一终端的多播/广播业务MBS能力信息，其中，所述第一终端的MBS能力信息表征所述第一终端是否支持共享传输模式；
    所述发送模块，用于向接入网设备发送所述第一终端的MBS能力信息。
  53. 根据权利要求52所述的通信装置，其特征在于，
    所述处理模块，还用于确定所述第一终端请求加入所述第一终端的多播业务的多播群组。
  54. 根据权利要求52或53所述的通信装置，其特征在于，所述第一终端的
    MBS能力信息包括在所述第一终端的核心网能力信息中。
  55. 一种通信装置，其特征在于，所述通信装置包括：处理模块和发送模块；
    所述处理模块，用于获取所述通信装置的多播/广播业务MBS能力信息，其中，所述通信装置的MBS能力信息用于指示所述通信装置的MBS能力，所述通信装置的MBS能力为所述通信装置是否支持共享传输模式；
    所述发送模块，用于向移动性管理网元发送所述通信装置的MBS能力信息。
  56. 根据权利要求55所述的通信装置，其特征在于，所述通信装置的MBS能力 信息包括在NG接口应用协议建立消息中。
  57. 一种通信装置，其特征在于，包括：处理器，所述处理器与存储器耦合，所述存储器用于存储程序或指令，当所述程序或指令被所述处理器执行时，使得所述装置执行如权利要求1至16中任一项所述的方法，或者执行如权利要求17至20中任一项所述的方法，或者执行如权利要求21至23中任一项所述的方法，或者执行如权利要求24至26中任一项所述的方法，或者执行如权利要求27至28中任一项所述的方法。
  58. 一种计算机可读介质，其上存储有计算机程序或指令，其特征在于，所述计算机程序或指令被执行时使得计算机执行如权利要求1至16中任一项所述的方法，或者执行如权利要求17至20中任一项所述的方法，或者执行如权利要求21至23中任一项所述的方法，或者执行如权利要求24至26中任一项所述的方法，或者执行如权利要求27至28中任一项所述的方法。
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