CN111726885B - Communication method, core network equipment and communication system - Google Patents
Communication method, core network equipment and communication system Download PDFInfo
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- CN111726885B CN111726885B CN201910209999.3A CN201910209999A CN111726885B CN 111726885 B CN111726885 B CN 111726885B CN 201910209999 A CN201910209999 A CN 201910209999A CN 111726885 B CN111726885 B CN 111726885B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/04—Large scale networks; Deep hierarchical networks
- H04W84/08—Trunked mobile radio systems
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Abstract
The application discloses a communication method, core network equipment and a communication system, wherein after a wireless resource control connection is established between a dispatching desk and a called terminal through a base station, a call request message comprising negotiated audio information and video information is sent to the called terminal, a call connection message comprising the negotiated audio information and video information is received from the called terminal, and the negotiated audio information and video information are sent to the dispatching desk through a session initial protocol message; therefore, the dispatching desk receives the negotiated audio information and video information from the called terminal, namely the dispatching desk and the called terminal carry out pull-up video and voice conversation. By the mode, the dispatching desk can dispatch the called terminal through voice when the dispatching desk and the called terminal pull up the video, and competitiveness of products is improved.
Description
Technical Field
The present application relates to the technical field of LTE (Long Term Evolution) broadband trunking communication systems, and in particular, to a communication method, core network equipment, and a communication system.
Background
In the existing LTE (long term evolution) trunking private network, when a dispatching desk performs a pull-up video service, the dispatching desk can only pull up a video from a called terminal, and the dispatching desk cannot perform a two-way conversation with the called terminal.
The current protocol does not support the simultaneous concurrence of two single calls, so that the dispatching desk cannot communicate with the called terminal in time, namely the dispatching desk cannot dispatch the called terminal through voice, and the competitiveness of products is reduced.
Disclosure of Invention
The application provides a communication method, core network equipment and a communication system, which are used for solving the problem that a called terminal cannot be dispatched through voice when a dispatching desk carries out a pull-up video service.
In order to solve the technical problem, the application adopts a technical scheme that: a communication method is provided, wherein the communication method comprises obtaining a session initiation request message from a dispatcher station, the session initiation request message comprising negotiation audio information and video information; establishing wireless resource control connection with a called terminal through a base station, and sending a call request message to the called terminal, wherein the call request message comprises the negotiation audio information and the video information; receiving a call connection message from the called terminal, wherein the call connection message comprises negotiated audio information and video information; and sending the negotiated audio information and video information to the dispatching desk through a session initiation protocol message.
In order to solve the technical problem, the other technical scheme adopted by the application is as follows: there is provided a core network device, wherein the core network device comprises a memory and a processor coupled to each other, the memory being configured to store a computer program, and the processor being configured to execute the computer program to implement the steps of any one of the above methods.
In order to solve the above technical problem, the present application adopts another technical solution: a communication system is provided, where the communication system includes a called terminal, a base station, a core network device, and a scheduling station, the scheduling station establishes communication with the called terminal through the core network device and the base station, and the core network device is the core network device in the above embodiment.
The application provides a communication method, core network equipment and a communication system, wherein after a wireless resource control connection is established between a dispatching desk and a called terminal through a base station, a call request message comprising negotiation audio information and video information is sent to the called terminal, a call connection message comprising the negotiation audio information and video information is received from the called terminal, and the negotiation audio information and video information are sent to the dispatching desk through a session initial protocol message; therefore, the dispatching desk receives the negotiated audio information and video information from the called terminal, namely the dispatching desk and the called terminal carry out pull-up video and voice conversation.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a flow chart of one embodiment of a communication method of the present application;
FIG. 2 is a block diagram of an embodiment of a communication system of the present application;
FIG. 3 is a flow chart of another embodiment of a method of communication of the present application;
fig. 4 is a schematic structural diagram of an embodiment of a core network device according to the present application;
fig. 5 is a timing diagram of the communication system shown in fig. 2.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described in the following with reference to the drawings in the embodiments of the present application. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be further noted that, for the convenience of description, only some of the structures related to the present application are shown in the drawings, not all of the structures. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
Referring to fig. 1 and fig. 2, fig. 1 is a flowchart of an embodiment of a communication method of the present application, and fig. 2 is a schematic structural diagram of an embodiment of a communication system of the present application. The communication method disclosed by the application is applied to the communication system 20, and the communication system 20 performs communication based on the LTE trunking private network. The communication system 20 includes a called terminal 21, a base station 22, a core network device 23, and a dispatching station 24, and the dispatching station 24 establishes communication with the called terminal 21 through the core network device 23 and the base station 22. The communication method may specifically include the steps of:
s11: a session initiation request message is obtained from dispatch station 24 that includes negotiated audio and video information.
The core network device 23 obtains a session initiation request message from the dispatching station 24, where the session initiation request message includes negotiation audio information and video information. When the dispatching desk 24 directs to dispatch the called terminal 21, for example, the dispatching desk 24 pulls up a video from the called terminal 21, the dispatching desk 24 generates a session initiation request message and sends the session initiation request message to the core network device 23, so that the core network device 23 obtains the session initiation request message from the dispatching desk 24.
S12: establishes a radio resource control connection with the called terminal 21 through the base station 22, and transmits a call request message including negotiation audio information and video information to the called terminal 21.
After the core network device 23 receives the request message, the core network device 23 establishes a radio resource control connection with the called terminal 21 through the base station 22 according to the request message. The Radio Resource Control (RRC) connection is used to allocate Radio resources and send related signaling, and since the main part of the Control signaling between the called terminal 21 and the base station 22 is a Radio Resource Control message, the Radio Resource Control message carries parameters required for operations such as establishment and modification, and also carries some signaling.
The core network device 23 further generates a call request message according to the request information, and after the core network device 23 establishes the radio resource control connection with the called terminal 21 through the base station 22, the core network device 23 sends the call request message to the called terminal 21, where the call request message includes the negotiated audio information and the video information.
S13: a call connection message including the negotiated audio information and video information is received from the called terminal 21.
The called terminal 21 generates a call connection message according to the call request message and sends the call connection message to the core network device 23, that is, the core network device 23 receives the call connection message from the called terminal 21, and the call connection message includes the negotiated audio information and video information.
S14: the negotiated audio and video information is sent to dispatch station 24 via session initiation protocol messages.
After the core network device 23 receives the call connection message from the called terminal 21, the core network device 23 sends the negotiated audio information and video information to the dispatching desk 24 through the session initiation protocol message. Among them, Session Initiation Protocol (SIP) is a multimedia communication Protocol established by IETF (Internet Engineering Task Force). It is a text-based application-layer control protocol for creating, modifying and releasing sessions of one or more participants.
When the dispatcher station 24 receives the negotiated audio information and video information, the dispatcher station 24 pulls up the video from the called terminal 21 according to the negotiated video information, and the dispatcher station 24 performs a voice conversation with the called terminal 21 according to the negotiated audio information, so that the dispatcher station 24 can dispatch the called terminal 21 by voice.
The application provides a communication method, through obtaining audio information and video information including negotiation from the dispatching desk 24, after establishing wireless resource control connection with the called terminal 21 through the base station 22, sending a call request message including the audio information and the video information including negotiation to the called terminal 21, receiving a call connection message including the audio information and the video information after negotiation from the called terminal 21, and sending the audio information and the video information after negotiation to the dispatching desk 24 through a session initial protocol message; therefore, the dispatcher station 24 receives the negotiated audio information and video information from the called terminal 21, that is, the dispatcher station 24 and the called terminal 21 perform a pull-up video and voice conversation, and by the above manner, the dispatcher station 24 can dispatch the called terminal 21 by voice when performing a pull-up video with the called terminal 21, thereby improving the competitiveness of the product.
Referring to fig. 3, fig. 3 is a flowchart illustrating another embodiment of a communication method according to the present application, wherein the method specifically includes the following steps:
s21: a session initiation request message is obtained from dispatch station 24 that includes negotiated audio and video information.
The core network device 23 obtains the session initiation request message from the dispatching station 24, where the session initiation request message includes negotiation audio information and video information, so that the Communication method in this embodiment may be specifically applied to a Broadband Trunking Communication (B-trunk, Broadband Trunking Communication) standard in a Trunking dispatching system, and the Broadband Trunking Communication standard may enhance a voice Trunking basic service and a supplementary service on the basis of ensuring compatibility with an LTE data service, and may also enhance Broadband Trunking service functions such as multimedia Trunking dispatching, and therefore, the Broadband Trunking Communication standard may meet requirements for voice Trunking, Broadband data, emergency command dispatching, and the like.
For example, the dispatching station 24 pulls up the video from the called terminal 21, and the dispatching station 24 generates the session initiation request message and transmits the session initiation request message to the core network device 23, so that the core network device 23 acquires the session initiation request message from the dispatching station 24.
The session initiation request message is an SIP message, the dispatch station 24 needs the session initiation request message to carry information such as a session type to indicate a type of a media session to be established to the SIP message, and the SIP message is based on a text encoding protocol, so the session initiation request message may include information such as a call type, a priority attribute, an end-to-end encryption indication, and a duplex indication, for example, a value of the call type may be "20".
Since a multimedia Session Description needs to be provided for the Session notification, the Session initiation request, and the like in the Session, the present application uses a Session Description Protocol (SDP) to transmit information to the core network device 23, and the negotiated audio information and video information may include media streams, where the SDP is a text-based Protocol, and thus the video media stream direction may be a ═ recurnly, and the audio media stream direction may be a ═ sendrecv, so as to notify the core network device 23 of receiving the Session initiation request message sent by the dispatcher 24.
S22: generates a session response message based on the session initiation request message and sends the session response message to dispatcher station 24.
The core network device 23 generates a session response message according to the session initiation request message acquired from the scheduling station 24, and transmits the session response message to the scheduling station 24. For example, after the core network device 23 generates a session response message according to the session initiation request message acquired from the dispatching station 24, the core network device 23 sends a 100TRYING message to the dispatching station 24 to notify the dispatching station 24 that the session initiation request message has been received.
S23: a paging message is sent to the base station 22 so that the base station 22 finds the called terminal 21 according to the paging message.
The core network device 23 sends a paging message to the base station 22 so that the base station 22 finds the called terminal 21 according to the paging message. After the core network device 23 sends the session response message to the dispatching station 24, the paging process for the called terminal 21 is triggered, so that the core network device 23 sends the paging message to the base station 22, and the base station 22 responds to the paging message to initiate the paging process to the called terminal 21, so that the base station 22 finds the called terminal 21 according to the paging message.
S24: a radio resource control connection is established with the called terminal 21 through the base station 22.
The core network device 23 establishes a radio resource control connection with the called terminal 21 through the base station 22. When the base station 22 finds the called terminal 21, the base station 22 judges whether the called terminal 21 is in an idle state; if the called terminal 21 is in the connected state, the core network device 23 cannot establish connection with the called terminal 21; if the called terminal 21 is in an idle state, the core network device 23 may establish a connection with the called terminal 21, that is, when the called terminal 21 is in an idle state, the core network device 23 establishes a radio resource control connection with the called terminal 21 through the base station 22.
S25: a call request message is sent to the called terminal 21, the call request message including the negotiated audio information and video information.
The core network device 23 transmits a call request message including negotiation audio information and video information to the called terminal 21. After the core network device 23 establishes a connection with the called terminal 21 through the base station 22, the core network device 23 may directly send call request information including negotiation audio information and video information to the called terminal 21; the call request message may include media formats for negotiating audio information and video information, where the media formats include a call ID, a call number, a call type, a call attribute, a call priority, audio description information, video description information, and the like, the audio description information may include audio media, and the video description information may include video media.
S26: receiving the call response message from the called terminal 21, establishing a dedicated bearer with the called terminal 21 through the base station 22, and receiving a ringing message from the called terminal 21, transmitting the ringing message to the dispatcher station 24 according to the ringing message.
Step S26 is a paging procedure initiated by the core network device 23 to the called terminal 21. Specifically, after the core network device 23 receives the call response message from the called terminal 21, the dedicated bearer with the called terminal 21 is established through the base station 22, the called terminal 21 sends, for example, alerting signaling to the core network device 23, so that the core network device 23 receives a RINGING message from the called terminal 21, and the core network device 23 sends a RINGING message to the dispatching desk 24 according to the RINGING message, for example, the core network device 23 sends a 180RINGING message to the dispatching desk 24, so as to notify the dispatching desk 24 that the called terminal 21 has rung.
S27: a call connection message including the negotiated audio information and video information is received from the called terminal 21.
The core network device 23 receives call connection information from the called terminal 21, and the call connection information may include negotiated audio information and video information, wherein the negotiated audio information and video information may include audio media and video media.
S28: the negotiated audio and video information is sent to dispatch station 24 via session initiation protocol messages.
The core network device 23 sends the negotiated audio information and video information to the dispatching desk 24 through the session initiation protocol message, for example, the core network device 23 sends a session initiation protocol 200OK message to the dispatching desk 24, where the 200OK message carries the negotiated audio information and video information, that is, in the above step S27 and this step S28, the called terminal 21 sends the negotiated audio information and video information to the dispatching desk 24 through the core network device 23.
S29: a call connection confirmation message is transmitted to the called terminal 21 and a confirmation message is received from the dispatching station 24.
The core network device 23 transmits a call connection confirmation message to the called terminal 21. The dispatcher station 24 sends an acknowledgement message to the core network device 23, and the core network device 23 receives the acknowledgement message from the dispatcher station 24, for example, the core network device 23 sends a call connection acknowledgement message to the called terminal 21 and receives a SIP acknowledgement message sent from the dispatcher station 24. At this time, the called terminal 21 and the dispatcher station 24 can make a call for voice and video messages.
It should be noted that, there may be no timing relationship between the two steps of the core network device 23 sending the call connection confirmation message to the called terminal 21 and receiving the session initiation protocol confirmation message sent from the dispatching desk 24.
The application provides a communication method, through obtaining audio information and video information including negotiation from the dispatching desk 24, after establishing wireless resource control connection with the called terminal 21 through the base station 22, sending a call request message including the audio information and the video information including negotiation to the called terminal 21, receiving a call connection message including the audio information and the video information after negotiation from the called terminal 21, and sending the audio information and the video information after negotiation to the dispatching desk 24 through a session initial protocol message; therefore, the dispatcher station 24 receives the negotiated audio information and video information from the called terminal 21, that is, the dispatcher station 24 and the called terminal 21 perform a pull-up video and voice conversation, and by the above manner, the dispatcher station 24 can dispatch the called terminal 21 by voice when performing a pull-up video with the called terminal 21, thereby improving the competitiveness of the product.
Corresponding to the communication method in the foregoing embodiment, the present application provides a core network device, and specifically refer to fig. 4, where fig. 4 is a schematic structural diagram of an embodiment of a core network device in the present application. The core network apparatus 30 disclosed in the present application comprises a memory 31 and a processor 32 coupled to each other, the memory 31 is configured to store a computer program, and the processor 32 is configured to execute the computer program to implement the steps of any one of the above methods.
Specifically, the steps of the processor 32 executing the communication method may include:
s31: and acquiring a session initiation request message from the dispatching desk, wherein the session initiation request message comprises negotiation audio information and video information.
S32: and establishing a wireless resource control connection with the called terminal through the base station, and sending a call request message to the called terminal, wherein the call request message comprises negotiation audio information and video information.
S33: and receiving a call connection message from the called terminal, wherein the call connection message comprises the negotiated audio information and video information.
S34: and sending the negotiated audio information and video information to the dispatching desk through the session initiation protocol message.
The specific implementation of the communication method executed by the processor is similar to the above implementation, and is not described herein again.
The core network device 30 provided in this embodiment enables the dispatcher station to dispatch the called terminal 21 through voice when performing a pull-up video with the called terminal 21, thereby improving the competitiveness of the product.
Corresponding to the communication method in the foregoing embodiment, the present application provides a communication system 20, please refer to fig. 2 and fig. 5, fig. 2 is a schematic structural diagram of an embodiment of a communication system in the present application, fig. 5 is a timing diagram of the communication system shown in fig. 2, the communication system 20 includes a called terminal 21, a base station 22, a core network device 23, and a dispatching station 24, the dispatching station 24 establishes communication with the called terminal 21 through the core network device 23 and the base station 22, the core network device 23 may be the core network device 30 in the foregoing embodiment, specifically, the core network device 23 may perform the following steps:
s41: a session initiation request message is obtained from dispatch station 24 that includes negotiated audio and video information.
S42: establishes a radio resource control connection with the called terminal 21 through the base station 22, and transmits a call request message including negotiation audio information and video information to the called terminal 21.
S43: a call connection message including the negotiated audio information and video information is received from the called terminal 21.
S44: the negotiated audio and video information is sent to dispatch station 24 via session initiation protocol messages.
The steps of the core network device 23 for implementing the communication method are similar to those of the above embodiments, and are not described herein again. The communication system 20 provided in this embodiment enables the dispatch station 24 to dispatch the called terminal 21 through voice when performing pull-up video with the called terminal 21, thereby improving the competitiveness of the product.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the modules or units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each of the units may exist alone physically, or two or more units may be integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application, which are essential or contributing to the prior art, or all or part of the technical solutions may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like) or a processor (processor) to execute all or part of the steps of the methods according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk, and various media capable of storing program codes.
The above description is only an embodiment of the present application, and is not intended to limit the scope of the present application, and all equivalent structures or equivalent processes performed by the present application and the contents of the attached drawings, which are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.
Claims (10)
1. A communication method, characterized in that the communication method comprises:
acquiring a session initiation request message from a dispatching desk, wherein the session initiation request message comprises negotiation audio information and video information;
establishing wireless resource control connection with a called terminal through a base station, and sending a call request message to the called terminal, wherein the call request message comprises the negotiation audio information and the video information;
receiving a call connection message from the called terminal, wherein the call connection message comprises negotiated audio information and video information, and the negotiated audio information and the negotiated video information are generated according to the negotiated audio information and the negotiated video information in the session initiation request message;
and sending the negotiated audio information and video information to the dispatching desk through a session initiation protocol message.
2. The communication method according to claim 1, wherein after the step of obtaining the session initiation request message from the dispatcher station, the communication method further comprises:
and generating a session response message according to the session initiation request message, and sending the session response message to the dispatching desk.
3. The communication method according to claim 1, wherein before the step of establishing the radio resource control connection with the called terminal through the base station, the communication method further comprises:
and sending a paging message to the base station so that the base station finds the called terminal according to the paging message.
4. The communication method according to claim 3, wherein the establishing a radio resource control connection with the called terminal via the base station comprises:
and when the called terminal is idle, establishing wireless resource control connection with the called terminal through the base station.
5. The communication method according to claim 4, wherein after the step of transmitting the call request message to the called terminal, the communication method further comprises:
receiving a call response message from the called terminal;
establishing a special bearer with the called terminal through the base station;
receiving a ringing message from the called terminal;
and sending a ringing message to the dispatching desk according to the ringing message.
6. The communication method according to claim 5, wherein after the step of sending the negotiated audio and video information to the dispatcher station via a Session initiation protocol message, the communication method further comprises:
sending a call connection confirmation message to the called terminal;
an acknowledgement message is received from the dispatch station.
7. The communication method according to claim 1, wherein the session initiation request message comprises a call type, a priority attribute, an end-to-end encryption indication, and a duplex indication.
8. The communication method according to claim 1, wherein the call request message includes media formats of the negotiated audio information and the video information, and the media formats include call ID, call number, call type, call attribute, call priority, audio description information, and video description information.
9. A core network device, characterized in that the core network device comprises a memory and a processor coupled to each other, the memory being configured to store a computer program, and the processor being configured to execute the computer program to implement the steps of the method according to any of claims 1-8.
10. A communication system, characterized in that the communication system comprises a called terminal, a base station, a core network device and a dispatching desk, the dispatching desk establishes communication with the called terminal through the core network device and the base station, and the core network device is the core network device of claim 9.
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