WO2024012288A1

WO2024012288A1 - Data channel holding methods and apparatuses, communication devices, and readable storage medium

Info

Publication number: WO2024012288A1
Application number: PCT/CN2023/105149
Authority: WO
Inventors: 程思涵
Original assignee: 维沃移动通信有限公司
Priority date: 2022-07-11
Filing date: 2023-06-30
Publication date: 2024-01-18
Also published as: CN117425228A

Abstract

Disclosed in the present application are data channel holding methods and apparatuses, communication devices, and a readable storage medium, belonging to the technical field of communications. A data channel holding method in the embodiments of the present application comprises: when M data channels are established between a first communication device and a second communication device, the first communication device determines from the M data channels N data channels needing to be held; and the first communication device sends a holding request, the holding request being used for holding the N data channels, N being a positive integer, and M being greater than or equal to N.

Description

Data channel maintenance method, device, communication equipment and readable storage medium

Cross-references to related applications

This application claims priority to Chinese Patent Application No. 202210815577.2 filed in China on July 11, 2022, the entire content of which is incorporated herein by reference.

Technical field

The present application belongs to the field of communication technology, and specifically relates to a method, device, communication equipment and readable storage medium for maintaining a data channel.

Background technique

Currently, when streaming media technology is used to transmit media services, during the call between terminal A and terminal B, if terminal A needs to perform call hold, the media streaming services between terminal A and terminal B (such as voice services and video services), will be maintained.

In related technologies, in order to realize the expansion of media services, the 3GPP standard introduces a mechanism to establish a data channel (Data Channel, DC) during the call. Additional service transmission (for example, screen sharing) can be performed through the DC during the call. , real-time voice translation, location sharing, file transfer, etc.), thereby giving users a better experience.

In this way, how to maintain the data channel between terminals in the scenario where data channel is introduced is a technical problem that needs to be solved urgently.

Contents of the invention

Embodiments of the present application provide a method, device, communication device, and readable storage medium for maintaining a data channel, which enable communicating parties to accurately perform maintenance operations on the data channel, thereby improving user experience.

In a first aspect, a method for maintaining a data channel is provided. The method includes: when M data channels are established between a first communication device and a second communication device, the first communication device determines which of the M data channels N data channels need to be maintained; the first communication device sends a retention request; wherein the above-mentioned retention request is used to maintain N data channels; N is a positive integer, and M is greater than or equal to N.

In a second aspect, a device for maintaining data channels is provided. The device includes: a determining module and a sending module, wherein: the determining module is used to establish M data channels between the first communication device and the second communication device. , determine the N data channels that need to be maintained among the M data channels; the sending module is used to send a retention request; where the retention request is used to maintain the N data channels determined by the determination module; N is a positive integer, and M is greater than or equal to N.

In a third aspect, a method for maintaining a data channel is provided. The method includes: when M data channels are established between a first communication device and a second communication device, the second communication device receives a retaining request; the retaining request is used to Maintain N data channels that need to be maintained among the M data channels; where N is a positive integer, and M is greater than or equal to N.

In a fourth aspect, a device for maintaining a data channel is provided. The device includes: a receiving module; a receiving module for, when M data channels are established between the first communication device and the second communication device, the second communication device Receive a hold request; the hold request is used to hold N data channels that need to be held among the M data channels; where N is a positive integer, and M is greater than or equal to N.

In a fifth aspect, a communication device is provided. The terminal includes a processor and a memory. The memory stores programs or instructions that can be run on the processor. When the program or instructions are executed by the processor, the following is implemented: The steps of the method described in the first aspect.

In a sixth aspect, a communication device is provided, including a processor and a communication interface, wherein the processor is configured to determine M data channels when M data channels are established between the first communication device and the second communication device. There are N data channels that need to be maintained, and the communication interface is used to send a retention request, where the retention request is used to maintain N data channels, where N is a positive integer, and M is greater than or equal to N.

In a seventh aspect, a communication device is provided. The communication device includes a processor and a memory. The memory stores programs or instructions that can be run on the processor. The program or instructions are implemented when executed by the processor. The steps of the method as described in the third aspect.

In an eighth aspect, a communication device is provided, including a processor and a communication interface, wherein the communication interface is used to receive a hold request when M data channels are established between the first communication device and the second communication device, The hold request is used to hold N data channels that need to be held among the M data channels; where N is a positive integer, and M is greater than or equal to N.

A ninth aspect provides a communication system, including: a first communication device and a second communication device. The first communication device can be used to perform the steps of the method for maintaining a data channel as described in the first aspect. The third communication device The second communication device may be used to perform the steps of the method for maintaining the data channel as described in the third aspect

In a tenth aspect, a readable storage medium is provided. Programs or instructions are stored on the readable storage medium. When the programs or instructions are executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method are implemented as described in the first aspect. The steps of the method described in the third aspect.

In an eleventh aspect, a chip is provided. The chip includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the method described in the first aspect. method, or implement a method as described in the third aspect.

In a twelfth aspect, a computer program/program product is provided, the computer program/program product is stored in a storage medium, and the computer program/program product is executed by at least one processor to implement as described in the first aspect The steps of the method for maintaining the data channel, or the steps of implementing the method for maintaining the data channel as described in the third aspect.

In this embodiment of the present application, when M data channels are established between the first communication device and the second communication device, the first communication device determines the N data channels that need to be maintained among the M data channels; the first The communication device sends a hold request; wherein, the above hold request is used to hold N data channels; N is a positive integer, and M is greater than or equal to N. Through this method, when the first communication device and the second communication device use at least one data channel, the first communication device can determine which data channels need to be maintained, and send a hold request to the second communication device to maintain the data channels that need to be maintained. data channel. In this way, the communicating parties can accurately perform the holding operation on the data channels that need to be maintained, thereby ensuring the consistency of the data services transmitted by the communicating parties through the data channels, thereby improving user experience.

Description of drawings

Figure 1 is a block diagram of a wireless communication system provided by an embodiment of the present application;

Figure 2 is a schematic diagram of a method for maintaining a data channel provided by an embodiment of the present application;

Figure 3 is a second schematic diagram of a method for maintaining a data channel provided by an embodiment of the present application;

Figure 4 is a third schematic diagram of the data channel maintenance method provided by the embodiment of the present application;

Figure 5 is a fourth schematic diagram of the data channel maintenance method provided by the embodiment of the present application;

Figure 6 is a fifth schematic diagram of a method for maintaining a data channel provided by an embodiment of the present application;

Figure 7 is a schematic diagram of the sixth schematic diagram of the data channel maintenance method provided by the embodiment of the present application;

Figure 8 is one of the structural schematic diagrams of the data channel holding device provided by the embodiment of the present application;

Figure 9 is the second structural schematic diagram of the data channel holding device provided by the embodiment of the present application;

Figure 10 is a schematic structural diagram of a communication device provided by an embodiment of the present application;

Figure 11 is a schematic diagram of the hardware structure of the terminal provided by the embodiment of the present application;

Figure 12 is a schematic diagram of the hardware structure of a network-side device provided by an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art fall within the scope of protection of this application.

The terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects and are not used to describe a specific order or sequence. It is to be understood that the terms so used are interchangeable under appropriate circumstances so that the embodiments of the present application can be practiced in sequences other than those illustrated or described herein, and that "first" and "second" are distinguished objects It is usually one type, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "and/or" in the description and claims indicates at least one of the connected objects, and the character "/" generally indicates that the related objects are in an "or" relationship.

It is worth pointing out that the technology described in the embodiments of this application is not limited to Long Term Evolution (Long Term Evolution, LTE)/LTE Evolution (LTE-Advanced, LTE-A) systems, and can also be used in other wireless communication systems, such as code Code Division Multiple Access (CDMA), Time Division Multiple Access (Time Division Multiple Access, TDMA), Frequency Division Multiple Access (Frequency Division Multiple Access, FDMA), Orthogonal Frequency Division Multiple Access (Orthogonal Frequency Division Multiple Access, OFDMA), Single-carrier Frequency Division Multiple Access (SC-FDMA) and other systems. The terms "system" and "network" in the embodiments of this application are often used interchangeably, and the described technology can be used not only for the above-mentioned systems and radio technologies, but also for other systems and radio technologies. The following description describes a New Radio (NR) system for example purposes, and uses NR terminology in much of the following description, but these techniques can also be applied to applications other than NR system applications, such as 6th Generation , 6G) communication system.

Figure 1 shows a block diagram of a wireless communication system to which embodiments of the present application are applicable. The wireless communication system includes terminal 11 and network side equipment Prepare 12. The terminal 11 may be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), or a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), a palmtop computer, a netbook, or a super mobile personal computer. (ultra-mobile personal computer, UMPC), mobile Internet device (Mobile Internet Device, MID), augmented reality (AR)/virtual reality (VR) equipment, robots, wearable devices (Wearable Device) , vehicle-mounted equipment (VUE), pedestrian terminal (PUE), smart home (home equipment with wireless communication functions, such as refrigerators, TVs, washing machines or furniture, etc.), game consoles, personal computers (PC), teller machines or self-service Terminal devices such as mobile phones, wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart anklets, etc.), Smart wristbands, smart clothing, etc. In addition to the above terminal equipment, the terminal involved in this application may also be a chip within the terminal, such as a modem chip or a system on chip (SoC). It should be noted that the embodiment of the present application does not limit the specific type of the terminal 11. The network side device 12 may include an access network device or a core network device, where the access network device 12 may also be called a radio access network device, a radio access network (Radio Access Network, RAN), a radio access network function or Wireless access network unit. The access network device 12 may include a base station, a WLAN access point or a WiFi node, etc. The base station may be called a Node B, an evolved Node B (eNB), an access point, a Base Transceiver Station (BTS), a radio Base station, radio transceiver, Basic Service Set (BSS), Extended Service Set (ESS), Home Node B, Home Evolved Node B, Transmitting Receiving Point (TRP) or all Some other appropriate terminology in the above field, as long as the same technical effect is achieved, the base station is not limited to specific technical terms. It should be noted that in the embodiment of this application, only the base station in the NR system is used as an example for introduction, and The specific type of base station is not limited. Core network equipment may include but is not limited to at least one of the following: core network nodes, core network functions, mobility management entities (Mobility Management Entity, MME), access mobility management functions (Access and Mobility Management Function, AMF), session management functions (Session Management Function, SMF), User Plane Function (UPF), Policy Control Function (PCF), Policy and Charging Rules Function (PCRF), Edge Application Service Discovery function (Edge Application Server Discovery Function, EASDF), Unified Data Management (UDM), Unified Data Repository (UDR), Home Subscriber Server (HSS), centralized network configuration ( Centralized network configuration (CNC), Network Repository Function (NRF), Network Exposure Function (NEF), Local NEF (Local NEF, or L-NEF), Binding Support Function (Binding Support Function, BSF), application function (Application Function, AF), etc. It should be noted that in the embodiment of this application, only the core network equipment in the NR system is used as an example for introduction, and the specific type of the core network equipment is not limited.

The data channel maintenance method provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings through some embodiments and their application scenarios.

1) Data channel

In related technologies, when streaming media technology is used to transmit voice services, during the call between UE-A and UE-B, if UE-A needs to answer the call from UE-C, UE-A needs to -B sends a call hold request (ie re-INVITE request) to perform call hold.

At present, with the development of technology, a new concept has emerged - Internet protocol multimedia subsystem (IMS) data channel (Data Channel, DC), which is mainly used to carry voice over long term The fifth generation communication technology data channel (5G data channel) is superimposed on the voice service (voice call) of evolution (VoLTE), thereby upgrading the real-time audio and video communication based on IMS to real-time interaction, enriching the business scenarios of IMS. Technically, the IMS data channel can be regarded as a new media type, and the Stream Control Transmission Protocol (SCTP) can be used as the bearer protocol.

However, how to maintain the data channel between terminals in a scenario where additional service transmission is introduced is a technical problem that needs to be solved urgently.

In the data channel maintaining method provided by the embodiment of the present application, when the first communication device and the second communication device use at least one data channel, the first communication device can determine which data channels need to be maintained, and provide the data to the second communication device. The communication device sends a hold request to hold the data channel that needs to be held. In this way, the communicating parties can accurately perform the holding operation on the data channels that need to be maintained, thereby ensuring the consistency of the data services transmitted by the communicating parties through the data channels, thereby improving user experience.

2) Call on hold

It should be noted that call hold means that the mobile user who is talking can temporarily interrupt the original call and make a new call while maintaining contact with the original call; when the original call needs to be resumed, the new call will be placed in the Put the call on hold and continue the call with the original caller, or end the call with them individually or simultaneously.

Specifically, take the call hold process of voice service as an example:

The call holding process for voice services may include the following steps 11 to 16:

Step 11: UE-A sends a re-INVITE request to UE-B.

Among them, the re-INVITE request is used to perform call hold (call hold).

Specifically, call holding is implemented by modifying the attribute information (attribute) of the session description protocol (SDP, session description protocol) corresponding to each media, which is specifically described through the a line of the SDP.

For example, if the media stream is a media stream that can be received and sent, the media stream is maintained by setting line a of the SDP of the media stream to sendonly. The corresponding protocol is described as: "a=sendonly" ", if the stream was previously a sendrecv media stream; if the media stream is a receive-only media stream, the media stream is maintained by setting line a of the SDP of the media stream to inactive, and the corresponding protocol Described as: "a=inactive", if the stream was previously a recvonly media stream.

For example, for video media, when holding a call, the SDP information of re-INVITE is as follows:

Content-Type:application/sdp

m＝video 3400 RTP/AVPF 98 99

b＝AS:75

a＝curr:qos local sendrecv

a＝curr:qos remote sendrecv

a＝des:qos mandatory local sendrecv

a＝des:qos optional remote sendrecv

a=sendonly

Chinese comparison is as follows:

Content type: application/sdp

m＝Video 3400 RTP/AVPF 98 99

It should be noted that the m line represents video media (video media codec method)

b＝AS:75

a=curr:qos local sending and receiving

a=curr:qos remote sending and receiving

a=des:qos forces local sendrecv

a=des:qos optional remote sendrecv

a=send only

To be clear, the video media is kept alive by setting line a to send only

For example, for voice media, when holding a call, the SDP information of re-INVITE is as follows:

a＝rtpmap:98 H263

a＝fmtp:98 profile-level-id＝0

a＝rtpmap:99:MPVMP4V-ES

m＝audio 3456 RTP/AVPF 97 96

b＝AS:25.4

a＝curr:qos local sendrecv

a＝curr:qos remote sendrecv

a＝des:qos mandatory local sendrecv

a＝des:qos optional remote sendonly

a=sendonly

a=rtpmap:97 AMR

a＝fmtp:97 mode-set＝0,2,5,7；maxframes＝2

a＝rtpmap:96 telephone-event

Chinese comparison is as follows:

a＝rtpmap:98 H263

a＝fmtp:98 profile-level-id＝0

a＝rtpmap:99:MPVMP4V-ES

m＝Audio 3456 RTP/AVPF 97 96

b＝AS:25.4

a=curr:qos local sending and receiving

a=curr:qos remote sending and receiving

a=des:qos forces local sendrecv

a=des:qos optional remote sendonly

a=send only

a=rtpmap:97 AMR

a=fmtp:97 mode setting=0,2,5,7; maximum number of frames=2

a=rtpmap:96 phone event

It should be noted that for existing voice and video media, an m line represents a media, and an a line can be used to indicate whether to perform a call hold service for the media. Moreover, for users, when they need to communicate with a third party During a call, it is necessary to put the voice and video media on hold with the second party.

Step 12: The Proxy-Call Session Control Function (P-CSCF) sends the request to the Serving-Call Session Control Function (S-CSCF).

Step 13: The S-CSCF sends the request to the P-CSCF that provides services for UE-B.

Step 14: P-CSCS sends the request to UE-B.

Step 15: UE-B replies with 200OK, carrying a recvonly indication in the SDP of 200OK.

It should be noted that recvonly instructs UE-B to only receive media streams without sending media streams.

It should be noted that if UE-A carries an inactive indication in SDP, UE-B also replies with an inactive indication.

Step 16: UE-A sends a confirmation feedback ACK to UE-B.

Through the above steps, the call hold of UE-A can be realized, so that UE-A can temporarily interrupt the original voice service and perform a new voice service.

FIG. 2 is a schematic flowchart of a method for maintaining a data channel provided by an embodiment of the present application. As shown in Figure 2, the information search method provided by the embodiment of the present application may include the following steps 301 and 302:

Step 301: When M data channels are established between the first communication device and the second communication device, the first communication device determines N data channels that need to be maintained among the M data channels.

Among them, N is a positive integer, and M is greater than or equal to N.

Optionally, in this embodiment of the present application, the first communication device may be a user equipment (User Equipment, UE) or a network device.

Optionally, in this embodiment of the present application, the second communication device may be a user equipment (User Equipment, UE) or a network device.

Optionally, the above network device may be a base station or core network device.

For example, the first communication device and the second communication device may both be UEs; or the first communication device may be a UE and the second communication device may be a network device.

Optionally, in this embodiment of the present application, the above-mentioned data channel may be a data channel in IMS, that is, an IMS data channel. Optionally, the above data channel can be application DC, that is, the data channel of the application. Optionally, the above data channel can be used to transmit any multimedia information such as pictures, videos, menus, expressions, locations, augmented reality (Augmented Reality, AR)/virtual reality (Virtual Reality, VR) technology.

It should be noted that the 3GPP standard has introduced a mechanism to establish a DC (Data Channel) during a call. Through the DC, additional services can be performed during the call, such as screen sharing, real-time voice translation, location sharing, and file sharing. transmission, thereby giving users a better experience. When transmitting different services through data channels, different services usually correspond to different DC applications. The DC application can be dynamically downloaded to the terminal during the call without requiring the terminal to be installed in advance. For ease of description, DC application is referred to as APP below.

Optionally, in this embodiment of the present application, the N data channels that need to be maintained may be one or more of the M data channels that have been established.

Optionally, in this embodiment of the present application, the above N data channels are preconfigured or agreed upon by the protocol.

Optionally, in this embodiment of the present application, the first communication device determines the data channel on which the hold operation can be performed based on the app that uses the data channel; or, when establishing a data channel with the second communication device, the first communication device can communicate with the second communication device. The peer negotiates whether the data channel can be maintained, and only data that can be maintained can perform the retention operation.

For example, take the first communication device and the second communication device as both UEs. Assume that a bootloader data channel, a data channel for APP-1 (eg, location sharing), a data channel for APP-2 (eg, file transfer), and APP-3 (eg, screen) are established between UE-A and UE-B. shared) data channel and the data channel of APP-4 (such as voice translation), then UE-A can use the above-mentioned multiple established data channels, the data channel of the boot program, the data channel of APP-3 and the APP- The data channel of 4 is determined as the data channel that needs to be maintained.

Optionally, in this embodiment of the present application, when the first communication device transmits voice services with the second communication device and transmits data services with the second communication device through M data channels, if the first communication device If voice service needs to be performed with the third communication device, the first communication device determines N data channels that need to be maintained among the M data channels with the second communication device.

Optionally, the above-mentioned third communication device may be a UE or a network device.

For example, during the call between the first communication device and the second communication device, if the first communication device needs to talk to the third communication device, the first voice device can perform call hold and determine whether to communicate with the second communication device. one or more that need to be maintained between The data channel is used to maintain the data channel when the call is held, so that the first communication device can talk to the third communication device, or use the data channel to transmit data services with the third communication device.

Step 302: The first communication device sends a hold request.

Among them, the above-mentioned holding request is used to hold N data channels.

Optionally, in this embodiment of the present application, the above-mentioned hold request may be re-INVITE or INVITE.

Optionally, in this embodiment of the present application, the above-mentioned hold request is also used to hold the call.

Optionally, when the first communication device communicates with the second communication device and uses M data channels to transmit data services, if the first communication device needs to communicate with the third communication device, the first communication device sends Call request, which is used for call hold and data channel hold.

Optionally, in this embodiment of the present application, the above-mentioned hold request carries the first SDP information.

Wherein, the above-mentioned first SDP information includes indication information of N data channels;

The above instruction information is used to indicate maintaining N data channels.

For ease of understanding, this instruction information may also be called retention instruction information.

Further optionally, in this embodiment of the present application, the above-mentioned first SDP information includes description information of N data channels;

Wherein, the above description information includes instruction information.

Optionally, the description information of the data channel may include information such as the encoding format and transmission characteristics (such as low packet loss rate, low delay, etc.) of the data channel.

It should be noted that the description information of the data channel may include the a description line in the SDP, referred to as the a line for short.

Optionally, the above N data channels correspond to one indication information;

The one indication information is used to indicate maintaining N data channels.

For example, the indication information may be indication information for instructing to maintain the data channel of APP-1, the data channel of APP-2, and the data channel of APP-3.

In this way, one indication information is used to indicate maintaining multiple data channels, so that N data channels can share one indication information.

Optionally, the above-mentioned N data channels correspond to N pieces of indication information; the indication information corresponding to each of the above-mentioned N data channels is used to indicate maintaining the corresponding data channel.

For example, the N pieces of indication information may include one indication information 1 for instructing to maintain the data channel of APP-1 and another indication information for instructing to maintain the data channel of APP-2.

Exemplarily, the above-mentioned first SDP information includes the description information of each of the N data channels; the above-mentioned description information of each data channel includes a hold indication information (inactive); the above-mentioned hold indication information is used to instruct to keep N data channel.

Optionally, when the above hold request is used to request call hold, the first SDP information includes description information of video media and voice media, and the description information includes instruction information (sendonly) indicating to hold voice media and video media.

It should be noted that SDP is a session description format. SDP provides multimedia session descriptions for purposes such as session notifications, session invitations, and other forms of multimedia session initialization. SDP includes media description and data channel description, that is, the description information of the data channel.

Optionally, one data channel can correspond to one hold indication information. For example, for a data channel that needs to be maintained, the first communication device adds the retention indication information to the description information of the data channel. For a data channel that does not need to be maintained, the first communication device does not add the description information of the data channel. to modify. For example, assuming that the data channel of APP-1 needs to be maintained, add the description "a=inactive" under the a description line of the data channel of APP-1.

In this way, the instruction information corresponding to each data channel is used to instruct the maintenance of each data channel, so that the maintenance of any data channel can be flexibly and controllably instructed.

In some possible implementations, when the first communication device uses at least one data channel during a call with the second communication device, when the first communication device sends a call hold request to the second communication device, the first communication device determines Which data channels need to be held at the same time. For the data channels that need to be held at the same time by the call, the first communication device adds hold indication information under the a line corresponding to the data channel.

For example, when the first communication device needs to hold a call, the first SDP information of the above re-INVITE is as follows:

Content-Type:application/sdp

m＝video 3400 RTP/AVPF 98 99

For example, the m row represents video media

b＝AS:75

a＝curr:qos local sendrecv

a＝curr:qos remote sendrecv

a＝des:qos mandatory local sendrecv

a＝des:qos optional remote sendrecv

a=sendonly

For example, keep the video media alive by setting line a to sendonly

a＝rtpmap:98 H263

a＝fmtp:98 profile-level-id＝0

a＝rtpmap:99:MPVMP4V-ES

m＝audio 3456 RTP/AVPF 97 96

For example, the m line represents the voice media

b＝AS:25.4

a＝curr:qos local sendrecv

a＝curr:qos remote sendrecv

a＝des:qos mandatory local sendrecv

a＝des:qos optional remote sendonly

a=sendonly

For example, voice media is kept alive by setting line a to sendonly

The Chinese comparison is:

Content type: application/sdp

m＝Video 3400 RTP/AVPF 98 99

b＝AS:75

a=curr:qos local sending and receiving

a=curr:qos remote sending and receiving

a=des:qos forces local sendrecv

a=des:qos optional remote sendrecv

a=send only

a＝rtpmap:98 H263

a＝fmtp:98 profile-level-id＝0

a＝rtpmap:99:MPVMP4V-ES

m＝Audio 3456 RTP/AVPF 97 96

b＝AS:25.4

a=curr:qos local sending and receiving

a=curr:qos remote sending and receiving

a=des:qos forces local sendrecv

a=des:qos optional remote sendonly

a=send only

For example, when the first communication device needs to maintain the data channel, the first SDP information of the above re-INVITE is as follows:

a=rtpmap:97 AMR

a＝fmtp:97 mode-set＝0,2,5,7；maxframes＝2

a＝rtpmap:96 telephone-event

m＝application 52718 UDP/DTLS/SCTP webrtc-datachannel

For example, the m row represents the data channel

b＝AS:500

a=max-message-size:1024

a=sctp-port:5000

a=setup:passive

a＝fingerprint:SHA-1 4A:AD:B9:B1:3F:82:18:3B:54:02:12:DF:3E:5D:49:6B:19:E5:7C:AB

a=tls-id:abc3de65cddef001be82

a＝dcmap:10 subprotocol="http"

For example, the a line represents the bootstrap data channel, which is used to download the app

a=inactive

a＝dcmap:38754 max-time＝150; label="low latency"

For example, the a row represents the data channel of app-1, such as location sharing

a＝dcmap:7216 max-retr＝5；label="low loss"

For example, the a line represents the data channel of app-2, such as file transfer

a＝3gpp-qos-hint:loss＝0.01；latency＝100

a＝dcmap:38758 max-time＝100; label="low latency"

For example, the a row represents the data channel of app-3, such as screen sharing

a=inactive

a＝dcmap:26354 max-time＝200; label="low loss"

For example, the a line represents the data channel of app-4, such as voice translation

a=inactive

The Chinese comparison is:

a=rtpmap:97 AMR

a=fmtp:97 mode setting=0,2,5,7; maximum number of frames=2

a=rtpmap:96 phone event

m＝application 52718 UDP/DTLS/SCTP webrtc-datachannel The m represents the row data channel

b＝AS:500

a = Maximum message size: 1024

a=sctp port: 5000

a=setting:passive

a=Fingerprint: SHA-1 4A:AD:B9:B1:3F:82:18:3B:54:02:12:DF:3E:5D:49:6B:19:E5:7C:AB

a=tls-id:abc3de65cddef001be82

a=dcmap:10subprotocol="http"

a = inactive

a＝dcmap:38754 max-time＝150; label="low latency"

a=dcmap:7216 max-retr=5; label="Low loss"

a=3gpp-qos-hint: loss=0.01; delay=100

a＝dcmap:38758 max-time＝100; label="low latency"

a = inactive

a＝dcmap:26354 max-time＝200; label="low loss"

a = inactive

Optionally, in this embodiment of the present application, keeping the data channel may be keeping the data channel in a connected state.

Illustratively, combined with the above example, when multiple data channels have been established between UE-A and UE-B, assume that the data channel of APP-2 and the data channel of APP-3 are UE-A and UE-B. After negotiating the data channel that needs to be maintained, when UE-A needs to maintain the data channel, it sends a hold request to keep the data channel of APP-2 and the data channel of APP-3 in a connected state.

In the data channel maintaining method provided by the embodiment of the present application, when M data channels are established between the first communication device and the second communication device, the first communication device determines which of the M data channels need to be maintained. N data channels; the first communication device sends a hold request; wherein the above-mentioned hold request is used to hold N data channels; N is a positive integer, and M is greater than or equal to N. Through this method, when the first communication device and the second communication device use at least one data channel, the first communication device can determine which data channels need to be maintained, and send a hold request to the second communication device to maintain the data channels that need to be maintained. data channel. In this way, the communicating parties can accurately perform the holding operation on the data channels that need to be maintained, thereby ensuring the consistency of the data services transmitted by the communicating parties through the data channels, thereby improving user experience.

Optionally, in this embodiment of the present application, maintaining N data channels may include any of the following:

The first communication device interrupts the transmission of data services of the N data channels;

The first communication device maintains transmission of data services of N data channels.

In one example, keeping the data channel may be keeping the data channel in a connected state and stopping the transmission of service data in the data channel.

For example, when the first communication device and the second communication device use M data channels to transmit service data, keep N data channels among them in a connected state, and stop the transmission of data services in the N data channels, so as to This allows the data services in the N data channels to be temporarily interrupted when necessary, and can continue to be transmitted through the N data channels when transmission needs to be resumed.

For example, assume that UE-A currently uses the data channel of APP-1 (for example, location sharing) to share location with UE-B, and uses the data channel of APP-2 (for example, file transfer) to perform file transmission with UE-B. And use the data channel of APP-3 (such as screen sharing) to perform screen sharing with UE-B. Among them, the data channel that needs to be maintained is the data channel of APP-3, then UE-A sends a re-INVITE request to maintain APP-B. 3 (e.g., screen sharing) data channel to temporarily interrupt screen sharing with UE-B.

For another example, assume that UE-A and UE-B are currently talking, and use the data channel of APP-1 (for example, location sharing) to share location with UE-B, and use the data of APP-2 (for example, file transfer). The channel performs file transfer with UE-B, and uses the data channel of APP-3 (such as screen sharing) to perform screen sharing with UE-B. Among them, the data channel that needs to be maintained is the data channel of APP-3, then UE- When A needs to talk to UE-C, it can send a re-INVITE to request call hold and maintain the data channel of APP-3 (such as screen sharing), that is, temporarily interrupt the screen sharing with UE-B.

In this way, the data channel that needs to be maintained can be temporarily interrupted for data service transmission, and the data channel that does not need to be maintained can continue to transmit the data service, so that the data service that needs to be interrupted is temporarily interrupted, and the data service that needs to be continued can be continued. The transmitted data service remains transmitted, thereby avoiding interruption of the data service that the user needs to continue.

In another example, maintaining the data channel may be maintaining the data channel in a connected state and maintaining transmission of service data in the data channel.

For example, when the first communication device and the second communication device use M data channels to transmit service data, keep N data channels among them in a connected state, and maintain the transmission of data services in the N data channels, so as to This enables the data services in the N data channels to be continuously transmitted.

It should be noted that in this example, for data channels that do not need to be maintained, the transmission of data services can be temporarily interrupted.

For example, combined with the above example, assume that UE-A currently uses the data channel of APP-1 (for example, location sharing) to share location with UE-B, and uses the data channel of APP-2 (for example, file transfer) to communicate with UE-B. Perform file transfer, and use the data channel of APP-3 (such as screen sharing) to perform screen sharing with UE-B. Among them, the data channel that needs to be maintained is the data channel of APP-2, then UE-A sends re-INVITE Request to maintain the data channel of APP-2 to maintain file transfer between UE-A and UE-B.

In this way, the data channel that needs to be maintained can continue to be used for data service transmission, thereby avoiding interruption of the data service that the user needs to continue.

Optionally, in this embodiment of the present application, in the above-mentioned step 301, the first communication device determines the N data channels that need to be maintained among the M data channels, which may include the following step 301a:

Step 301a: The first communication device determines N data channels that need to be maintained from the M data channels based on the retention policies corresponding to the M data channels.

Among them, the retention strategy corresponding to any one of the above M data channels is any of the following:

The retention strategy of the application corresponding to any data channel;

The first communication device and the second communication device pre-negotiate the maintenance strategy for any of the above-mentioned data channels;

stipulated in the agreement.

Optionally, the retention policy of the application corresponding to any data channel can be pre-configured.

Optionally, different applications can correspond to different retention strategies.

For example, the retention policy for file transfer can be Cannot be maintained, that is, the data channel for file transmission is not maintained; the retention policy for location sharing can be Cannot be maintained, that is, the data channel for location sharing is not maintained; the retention policy for screen sharing can be Can Maintain or must maintain, that is, maintain the data channel of screen sharing; the retention policy of voice translation can be can maintain or must maintain, that is, maintain the data channel of file transfer; the retention policy of bootstrap can be must maintain, that is, maintain booting The program's data channel.

Optionally, the above application retention policy is related to the correlation between the application and the voice service. Optionally, the retention policy of the above application may be determined based on the correlation between the application and the voice service.

For example, the retention policy of applications with strong correlation with voice services (such as voice translation) can be determined as must be maintained, and the retention policy of applications with weak correlation with voice services (such as file transfer) can be determined as cannot be maintained. In this way, when the first communication device performs call hold, the data channel of the data service that is strongly related to the voice service can be determined as the data channel that needs to be maintained, so that the data service and the voice service are maintained together (that is, the transmission is temporarily interrupted) , and no hold operation is performed on other data channels, so that other data services can continue to be transmitted, thereby saving communication resources and avoiding poor user experience due to interruption of data service transmission.

For example, the first communication device may determine one or more data channels that need to be maintained according to the above applied retention policy.

For example, take the first communication device and the second communication device as both UEs. Assume that a bootloader data channel, a data channel for APP-1 (eg, location sharing), a data channel for APP-2 (eg, file transfer), and APP-3 (eg, screen) are established between UE-A and UE-B. shared) data channel and the data channel of APP-4 (such as voice translation), then UE-A will use the above-mentioned multiple established data channels according to the retention policy applied in the above example, the data channel of the boot program, APP The data channel of -3 and the data channel of APP-4 are determined as the data channels that need to be maintained.

For example, the first communication device may determine one or more data channels that need to be maintained according to the maintenance policy negotiated with the second communication device for the established data channels.

For example, assume that a bootstrap data channel, a data channel of APP-1 (such as location sharing), a data channel of APP-2 (such as file transfer), and a data channel of APP-3 (such as file transfer) are established between UE-A and UE-B. For example, the data channel of screen sharing) and the data channel of APP-4 (such as voice translation). Among them, the data channel of APP-2 and the data channel of APP-3 are the data that UE-A and UE-B can maintain through negotiation. channel, UE-A determines the data channel of APP-2 and the data channel of APP-3 as the data channels that need to be maintained.

In this way, when multiple data channels are established between the first communication device and the second communication device, the first communication device can determine one of the multiple data channels or data that needs to be retained based on the retention policy corresponding to each data channel. channel, so that data channel maintenance can be performed in a targeted manner.

Optionally, in the embodiment of the present application, the method for maintaining the data channel provided by the embodiment of the present application further includes the following step A1:

Step A1: In the process of establishing M data channels between the first communication device and the second communication device, the first communication device negotiates with the second communication device through the SDP information corresponding to the M data channels. Stay strategic.

Optionally, the SDP information corresponding to the M data channels may be SDP information including attribute information of the M data channels.

Optionally, the above retention strategies corresponding to the M data channels may be retention strategies corresponding to each of the M data channels. Optionally, for a data channel, the above-mentioned retention policy may be to maintain the data channel or not to maintain the data channel.

Optionally, in this embodiment of the present application, the above-mentioned M data channels include the first data channel; the above-mentioned step A1 may include the following steps B1 and step B2:

Step B1: The first communication device sends the second SDP information.

Step B2: The first communication device receives the third SDP information sent by the second communication device.

Wherein, the above-mentioned second SDP information includes first indication information, and the above-mentioned first indication information is used to indicate the first retention strategy corresponding to the first data channel;

The third SDP information includes second indication information, and the second indication information is used to indicate the second retention strategy corresponding to the first data channel.

Optionally, the first data channel may be any one of the M data channels.

Exemplarily, in the process of establishing M data channels, the first communication device sends second SDP information, the second SDP information includes description information of each data channel, and the description information of each data channel includes the first Indication information, the first indication information is used to indicate the retention strategy of the data channel corresponding to the first indication information, that is, whether to maintain the data channel corresponding to the first indication information.

For example, the above second SDP information is as follows:

m＝application 52718 UDP/DTLS/SCTP webrtc-datachannel

For example, the m row represents the data channel

b＝AS:500

a=max-message-size:1024

a=sctp-port:5000

a=setup:passive

a=tls-id:abc3de65cddef001be82

a＝dcmap:10 subprotocol="http"

a＝dcmap:38754 max-time＝150; label="low latency"

a＝canhold:true

For example, "canhold: true" is added to the description information (attribute information) of the data channel of app-1, indicating that the application DC can be held.

For example, if the data channel of app-1 does not need to be maintained, "canhold:false" can be added to the description information (i.e., attribute information) of the data channel of app-1 to indicate that the application DC cannot be maintained. (hold).

The Chinese comparison is:

m=Application 52718 UDP/DTLS/SCTP webrtc-datachannel

b＝AS:500

a = Maximum message size: 1024

a=sctp port: 5000

a=setting:passive

a=tls-id:abc3de65cddef001be82

a=dcmap:10subprotocol="http"

a＝dcmap:38754 max-time＝150; label="low latency"

a=canhold: true

a＝canhold:false

Optionally, after receiving the second SDP information sent by the first device, the second communication device sends the third SDP information.

Optionally, the above-mentioned third SDP information includes description information of each data channel, and the description information of each data channel includes second indication information. The second indication information is used to indicate the data channel corresponding to the second indication information. The retention strategy, that is, whether the data channel corresponding to the second indication information can be maintained.

Optionally, the first communication device and the second communication device negotiate the maintenance policy for the data channel based on the SDP information of both parties, and obtain the negotiation result.

Optionally, in this embodiment of the present application, in combination with the above step B1 and step B2, the above step A1 may include the following step C1 or step C2:

Step C1: When the first retention policy is consistent with the second retention policy, determine the first retention policy as the first data channel. Tao maintenance strategy.

Step C2: When the first retention policy and the second retention policy are inconsistent, determine the default retention policy as the retention policy of the first data channel, or determine the retention policy indicated by the second indication information as the retention policy of the first data channel. Stay strategic.

For example, when the retention strategies indicated by the instruction information of both communicating parties are consistent, the retention strategy is determined as the retention strategy of the data channel.

For example, take UE-A (ie, the first communication device) and UE-B (ie, the second communication device) to negotiate the maintenance policy of the data channel of APP-1. UE-A sends SDP information. The SDP information carries indication information that needs to maintain the data channel of APP-1. UE-B sends SDP information after receiving the SDP information. The SDP information sent by UE-B carries the instruction information that can maintain the data channel. Instruction information of the data channel of APP-1, then the negotiation result between UE-A and UE-B for the retention policy of the data channel of APP-1 is that the data channel of APP-1 can be maintained. Further, when UE-A subsequently performs a data channel maintenance operation, it may determine the data channel of APP-1 as a data channel that needs to be maintained.

For example, when the retention strategies indicated by the instruction information of the two communicating parties are inconsistent, the default retention strategy is determined to be the retention strategy negotiated by both parties for the data channel, or the retention strategy indicated by the instruction information of the second communication device is determined. It is determined as the retention policy negotiated by both parties for this data channel.

As an example, take UE-A and UE-B negotiating the maintenance policy of the data channel of APP-1. UE-A sends SDP information. The SDP information carries indication information that the data channel of APP-1 needs to be maintained. UE-B sends SDP information after receiving the SDP information. The SDP information sent by UE-B carries the instruction information that cannot be maintained. Instruction information of the data channel of APP-1, the result of the negotiation between UE-A and UE-B regarding the retention policy of the data channel of APP-1 is that the data channel of APP-1 cannot be maintained.

Optionally, the first communication device determines N data channels among the M data channels that need to be maintained based on a negotiation result with the second communication device regarding the maintenance policies of the M data channels.

Illustratively, in conjunction with the above example, when multiple data channels are established between UE-A and UE-B, and the data channels include the data channel of APP-1, assume that the retention policy for the data channel of APP-1 is The negotiation result is that the data channel of APP-1 can be maintained, then UE-A determines the data channel of APP-1 as the data channel that needs to be maintained.

In this way, the first communication device can negotiate with the second communication device whether the data channel can be maintained during the process of establishing a data channel with the second communication device. Only data that can be retained can perform the retention operation, so that both communicating parties can It can accurately perform hold operations on the data channels that need to be maintained, thereby ensuring the consistency of data services transmitted by both communicating parties through the data channels.

An embodiment of the present application provides a method for maintaining a data channel. As shown in Figure 3, the method of maintaining a data channel provided by an embodiment of the present application includes the following steps 401:

Step 401: When M data channels are established between the first communication device and the second communication device, the second communication device receives the hold request.

Wherein, the above-mentioned holding request is used to hold N data channels that need to be held among the M data channels.

Optionally, in this embodiment of the present application, the above-mentioned hold request carries the first SDP information;

It should be noted that the description of the above steps may refer to the relevant descriptions in the corresponding embodiment of FIG. 2 above, and will not be described again here.

In the data channel maintenance method provided by the embodiment of the present application, when M data channels are established between the first communication device and the second communication device, the second communication device receives the maintenance request; wherein, the above maintenance request is used to maintain N data channels; N is a positive integer, M is greater than or equal to N. Through this method, when the first communication device and the second communication device use at least one data channel, the second communication device can maintain the data channel that needs to be maintained according to the hold request sent by the first communication device. In this way, the communicating parties can accurately perform the holding operation on the data channels that need to be maintained, thereby ensuring the consistency of the data services transmitted by the communicating parties through the data channels, thereby improving user experience.

Optionally, in this embodiment of the present application, after the above step 401, the data channel maintaining method provided by the embodiment of the present application further includes the following step 402:

Step 402: The second communication device stops using N data channels to send data to the first communication device according to the hold request.

For example, take the N data channels including the data channel of APP-1 and the data channel of APP-2 as an example. After receiving the hold request sent by the first communication device, UE-B may stop using the data channel of APP-1 and the data channel of APP-2 to send data to UE-A.

In this way, the second communication device can stop using the data channel that needs to be maintained to send data according to the hold request, thereby ensuring the consistency of data transmission by both communicating parties through the data channel.

Optionally, in this embodiment of the present application, maintaining N data channels includes any of the following:

The second communication device interrupts the transmission of data services of the N data channels;

The second communication device maintains transmission of data services of N data channels.

It should be noted that the description of the above steps may refer to the relevant descriptions in the corresponding embodiments above, and will not be described again here.

Optionally, in the embodiment of the present application, the data channel maintaining method provided by the embodiment of the present application further includes the following step 402:

Step 402: In the process of establishing M data channels between the first communication device and the second communication device, the second communication device negotiates the M data channels with the first communication device through the SDP information corresponding to the M data channels. Corresponding retention strategy.

Optionally, in this embodiment of the present application, the above-mentioned M data channels include the first data channel;

The above step 402 may include the following steps 402a and 402b:

Step 402a: The second communication device receives the second SDP information sent by the first communication device.

Step 402b: The second communication device sends the third SDP information.

The second SDP information includes first indication information, and the first indication information is used to indicate the first retention strategy corresponding to the first data channel.

Optionally, in this embodiment of the present application, in combination with the above steps 402a and 402b, the above step 402 may also include the following step 402c or step 402d:

Step 402c: If the first retention policy is consistent with the second retention policy, determine the first retention policy as the retention policy of the first data channel.

Step 402d: If the first retention policy is inconsistent with the second retention policy, determine the default retention policy as the retention policy of the first data channel, or determine the retention policy indicated by the second indication information as the retention policy of the first data channel. Stay strategic.

An embodiment of the present application provides a method for maintaining a data channel. As shown in Figure 4, the method of maintaining a data channel provided by an embodiment of the present application includes the following steps 501 to 503:

Step 501: When M data channels are established between the first communication device and the second communication device, the first communication device determines N data channels that need to be maintained among the M data channels.

Step 502: The first communication device sends a hold request to the second communication device.

Step 503: The second communication device receives the hold request.

It should be noted that the description of the above steps may refer to the relevant descriptions in the corresponding embodiments of FIG. 3 and FIG. 4 above, and will not be described again here.

Optionally, in this embodiment of the present application, as shown in Figure 5, the above step 502 may include the following steps 502a1 to 502a4:

Step 502a1: The first communication device sends a hold request to the first proxy call session control function P-CSCF.

For example, the above-mentioned first P-CSCF may be a P-CSCF that provides services for the first communication device.

For example, the above-mentioned hold request may be a re-INVITE request.

For example, the above re-INVITE request carries a sendonly indication, and the sendonly indication is used to instruct the first communication device to only send the media stream but not receive the media stream.

Step 502a2: The first P-CSCF sends the hold request to the serving call session control function S-CSCF.

Step 502a3: The serving call session control function sends the hold request to the second proxy call session control function P-CSCF.

For example, the above-mentioned second proxy call session control function P-CSCF may be a P-CSCF that provides services for the second communication device.

Step 502a4: The second P-CSCF sends a hold request to the second communication device.

Further, in combination with the above steps 502a1 to 502a4, the above step 503 may include the following step 303a:

Step 503a: The second communication device receives the hold request sent by the second P-CSCF.

Optionally, in this embodiment of the present application, in conjunction with Figure 4, as shown in Figure 6, after the above step 503, the data channel maintaining method provided by the embodiment of the present application further includes the following steps 504 to 507:

Step 504: The second communication device sends a hold response to the first communication device.

For example, the above-mentioned hold response may be 200 OK.

For example, the 200 OK carries a recvonly indication, and the recvonly indication is used to instruct the second communication device to only receive the media stream without sending the media stream.

Step 505: The first communication device receives the hold response.

Step 506: The first communication device sends a confirmation message.

For example, the above-mentioned confirmation message may be an acknowledgment response ACK.

Step 507: The second communication device receives the confirmation message.

Optionally, in this embodiment of the present application, combined with the above-mentioned Figure 5 and Figure 6, as shown in Figure 7, the above-mentioned step 504 may include the following steps: 504a1 to step 504a4:

Step 504a1: The second communication device sends a hold response to the second P-CSCF.

Step 504a2: The second P-CSCF sends a hold response to the S-CSCF.

Step 504a3: The S-CSCF sends a hold response to the first P-CSCF.

Step 504a4: The first P-CSCF sends a hold response to the first communication device.

Further, in combination with the above steps 504a1 to 504a4, the above step 505 may include the following step 505a:

Step 505a: The first communication device receives the hold response sent by the first P-CSCF.

Optionally, in this embodiment of the present application, the above step 506 may include the following steps 506a1 to 506a4:

Step 506a1: The first communication device sends a confirmation message to the first P-CSCF.

Step 506a2: The first P-CSCF sends the confirmation message to the S-CSCF.

Step 506a3: The S-CSCF sends a confirmation message to the second P-CSCF.

Step 506a4: The second P-CSCF sends a confirmation message to the second communication device.

Further, in combination with the above steps 506a1 to 506a4, the above step 507 may include the following step 507a:

Step 507a: The second communication device receives the confirmation message sent by the second P-CSCF.

It should be noted that the above signaling interaction may be performed based on the real-time transmission protocol RTP.

In the data channel maintenance method provided by the embodiment of the present application, when UE-A uses at least one data channel during the call with UE-B, when UE-A sends a maintenance request to UE-B, UE-A determines Which data channels need to be maintained, and only data that can be retained can perform retention operations. In this way, both communicating parties can accurately perform hold operations on the data channel, thereby improving user experience.

In the data channel maintaining method provided by the embodiment of the present application, the execution subject may be a data channel maintaining device. In the embodiment of the present application, the data channel retention method is used as an example to illustrate the data channel retention device provided by the embodiment of the present application.

As shown in Figure 8, the embodiment of the present application provides a data channel holding device 600. The device 600 includes: a determining module 601 and a sending module 602, wherein: the determining module 601 is used to communicate between the first communication device and the second communication device. When M data channels are established between devices, determine the N data channels that need to be maintained among the M data channels;

Sending module 602, used to send a hold request;

Among them, the hold request is used to hold the N data channels determined by the determination module;

N is a positive integer, and M is greater than or equal to N.

Optionally, in this embodiment of the present application, the hold request carries the first Session Description Protocol SDP information;

Wherein, the first SDP information includes indication information of N data channels;

The instruction information is used to instruct to maintain N data channels.

Optionally, in this embodiment of the present application, the first SDP information includes description information of N data channels;

The description information includes instruction information.

Optionally, in this embodiment of the present application, N data channels correspond to N pieces of indication information; the indication information corresponding to each of the N data channels is used to indicate maintaining the corresponding data channel.

Optionally, in this embodiment of the present application, N data channels correspond to one indication information;

Among them, one indication information is used to indicate maintaining N data channels.

Optionally, in the embodiment of this application,

The determination module is specifically used to determine the N data channels that need to be maintained from the M data channels based on the retention strategies corresponding to the M data channels;

Among them, the retention strategy corresponding to any one of the M data channels is any of the following:

The retention strategy of the application corresponding to any data channel;

The first communication device and the second communication device pre-negotiate the maintenance strategy for any data channel;

stipulated in the agreement.

Optionally, in the embodiment of the present application, the determining module is also configured to, in the process of establishing M data channels between the first communication device and the second communication device, use the SDP information corresponding to the M data channels to match the The two communication devices negotiate the retention policies corresponding to the M data channels.

Optionally, in this embodiment of the present application, the M data channels include the first data channel; the device further includes: a receiving module;

The sending module is also used by the first communication device to send the second SDP information;

A receiving module, configured to receive the third SDP information sent by the second communication device;

The second SDP information includes first indication information, and the first indication information is used to indicate the first retention strategy corresponding to the first data channel;

The third SDP information includes second indication information, and the second indication information is used to indicate the second retention policy corresponding to the first data channel.

Optionally, in the embodiment of this application,

A determination module, specifically configured to determine the first retention policy as the retention policy of the first data channel when the first retention policy is consistent with the second retention policy; or,

The determination module is specifically configured to determine the default retention strategy as the retention strategy for M data channels when the first retention strategy is inconsistent with the second retention strategy, or determine the retention strategy indicated by the second indication information as M data channels. Data channel retention policy.

In the data channel holding device provided by the embodiment of the present application, when M data channels are established between the first communication device and the second communication device, the data channel holding device determines that one of the M data channels needs to be maintained. N data channels; the first communication device sends a hold request; wherein the above hold request is used to hold N data channels; N is a positive integer, and M is greater than or equal to N. Through this method, when the first communication device and the second communication device use at least one data channel, the data channel holding device can determine which data channels need to be maintained, and send a holding request to the second communication device to maintain the data channels that need to be maintained. data channel. In this way, the communicating parties can accurately perform the holding operation on the data channels that need to be maintained, thereby ensuring the consistency of the data services transmitted by the communicating parties through the data channels, thereby improving user experience.

As shown in Figure 9, the embodiment of the present application provides a data channel holding device 700. The device 700 includes: a receiving module 701, wherein: the receiving module 701 is used to establish M between a first communication device and a second communication device. In the case of data channels, a hold request is received; the hold request is used to hold N data channels that need to be held among the M data channels; where N is a positive integer, and M is greater than or equal to N.

Optionally, in this embodiment of the present application, the above device further includes: an execution module;

The above execution module is configured to stop using the N data channels to send data to the first communication device according to the hold request.

Optionally, in this embodiment of the present application, the above-mentioned hold request carries the first Session Description Protocol SDP information;

Optionally, in the embodiment of the present application, the device further includes: a determining module;

A determination module configured to negotiate with the first communication device the retention strategies corresponding to the M data channels through the SDP information corresponding to the M data channels during the process of establishing the M data channels between the first communication device and the second communication device. .

Optionally, in this embodiment of the present application, the M data channels include the first data channel; the device further includes: a sending module;

The receiving module is also used to receive the second SDP information sent by the first communication device;

The sending module is used to send the third SDP information;

Wherein, the second SDP information includes first indication information, and the first indication information is used to indicate the first retention strategy corresponding to the first data channel;

Optionally, in this embodiment of the present application, the determination module is specifically configured to determine the first retention strategy as the retention strategy of the first data channel when the first retention strategy is consistent with the second retention strategy; or ,

The determination module is specifically configured to determine the default retention policy as the retention policy of the first data channel when the first retention policy and the second retention policy are inconsistent, or determine the retention policy indicated by the second indication information as The retention strategy for the first data channel.

In the data channel holding device provided by the embodiment of the present application, when M data channels are established between the first communication device and the second communication device, the data channel holding device receives the holding request; wherein, the above holding request is used for Maintain N data channels; N is a positive integer, M is greater than or equal to N. Through this method, when the first communication device and the second communication device use at least one data channel, the data channel holding device can maintain the data channel that needs to be maintained according to the holding request sent by the first communication device. In this way, the communicating parties can accurately perform the holding operation on the data channels that need to be maintained, thereby ensuring the consistency of the data services transmitted by the communicating parties through the data channels, thereby improving user experience.

The data channel holding device in the embodiment of the present application may be an electronic device, such as an electronic device with an operating system, or may be a component in the electronic device, such as an integrated circuit or chip. The electronic device may be a terminal or other devices other than the terminal. For example, terminals may include but are not limited to the types of terminals 11 listed above, and other devices may be servers, network attached storage (Network Attached Storage, NAS), etc., which are not specifically limited in the embodiment of this application.

The data channel retention device provided by the embodiment of the present application can implement each process implemented by the method embodiments of Figures 1 to 7 and achieve the same technical effect. To avoid duplication, the details will not be described here.

Optionally, as shown in Figure 10, this embodiment of the present application also provides a communication device 1000, which includes a processor 1001 and a memory 1002. The memory 1002 stores programs or instructions that can be run on the processor 1001, such as , when the communication device 1000 is a terminal, When the program or instruction is executed by the processor 1001, each step of the above-mentioned data channel maintaining method embodiment is implemented, and the same technical effect can be achieved. When the communication device 1000 is a network-side device, when the program or instruction is executed by the processor 1001, each step of the above-mentioned data channel maintaining method embodiment is implemented, and the same technical effect can be achieved. To avoid duplication, the details are not repeated here.

An embodiment of the present application also provides a terminal, including a processor and a communication interface. When establishing M data channels with a second communication device, the processor determines N data channels that need to be maintained among the M data channels. The communication interface is used to send a hold request, where the hold request is used to hold N data channels, where N is a positive integer, and M is greater than or equal to N. This terminal embodiment corresponds to the above-mentioned first communication device side method embodiment. Each implementation process and implementation manner of the above-mentioned method embodiment can be applied to this terminal embodiment, and can achieve the same technical effect. Specifically, FIG. 11 is a schematic diagram of the hardware structure of a terminal that implements an embodiment of the present application.

The terminal 100 includes but is not limited to: a radio frequency unit 101, a network module 102, an audio output unit 103, an input unit 104, a sensor 105, a display unit 106, a user input unit 107, an interface unit 108, a memory 109, a processor 110, etc. At least some parts.

Those skilled in the art can understand that the terminal 100 may also include a power supply (such as a battery) that supplies power to various components. The power supply may be logically connected to the processor 110 through a power management system, thereby managing charging, discharging, and power consumption through the power management system. Management and other functions. The terminal structure shown in FIG. 11 does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown in the figure, or some components may be combined or arranged differently, which will not be described again here.

It should be understood that in the embodiment of the present application, the input unit 104 may include a graphics processing unit (Graphics Processing Unit, GPU) 1041 and a microphone 1042. The graphics processor 1041 is responsible for the image capture device (GPU) in the video capture mode or the image capture mode. Process the image data of still pictures or videos obtained by cameras (such as cameras). The display unit 106 may include a display panel 1061, which may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 107 includes a touch panel 1071 and at least one of other input devices 1072 . Touch panel 1071 is also called a touch screen. The touch panel 1071 may include two parts: a touch detection device and a touch controller. Other input devices 1072 may include, but are not limited to, physical keyboards, function keys (such as volume control keys, switch keys, etc.), trackballs, mice, and joysticks, which will not be described again here.

In this embodiment of the present application, after receiving downlink data from the network side device, the radio frequency unit 101 can transmit it to the processor 110 for processing; in addition, the radio frequency unit 101 can send uplink data to the network side device. Generally, the radio frequency unit 101 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

Memory 109 may be used to store software programs or instructions as well as various data. The memory 109 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, an application program or instructions required for at least one function (such as a sound playback function, Image playback function, etc.) etc. Additionally, memory 109 may include volatile memory or nonvolatile memory, or memory 109 may include both volatile and nonvolatile memory. Among them, non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electrically removable memory. Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. Volatile memory can be random access memory (Random Access Memory, RAM), static random access memory (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), synchronous dynamic random access memory (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDRSDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (Synch link DRAM) , SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DRRAM). Memory 109 in embodiments of the present application includes, but is not limited to, these and any other suitable types of memory.

The processor 110 may include one or more processing units; optionally, the processor 110 integrates an application processor and a modem processor, where the application processor mainly handles operations related to the operating system, user interface, application programs, etc., Modem processors mainly process wireless communication signals, such as baseband processors. It can be understood that the above modem processor may not be integrated into the processor 110 .

Take the first communication device as a terminal as an example. Wherein, the processor 110 is used to determine N data channels that need to be maintained among the M data channels when M data channels are established between the first communication device and the second communication device;

Radio frequency unit 101, used to send a hold request;

Wherein, the hold request is used to hold N data channels determined by the processor 110;

N is a positive integer, and M is greater than or equal to N.

The instruction information is used to instruct to maintain N data channels.

The description information includes instruction information.

Optionally, in the embodiment of this application,

The processor 110 is specifically configured to determine the N data channels that need to be maintained from the M data channels based on the retention strategies corresponding to the M data channels;

The retention strategy of the application corresponding to any data channel;

stipulated in the agreement.

Optionally, in this embodiment of the present application, the processor 110 is also configured to, in the process of establishing M data channels between the first communication device and the second communication device, use the SDP information corresponding to the M data channels, and The second communication device negotiates maintenance policies corresponding to the M data channels.

Optionally, in this embodiment of the present application, the M data channels include the first data channel and the radio frequency unit 101, which is also used by the first communication device to send the second SDP information;

The radio frequency unit 101 is also used to receive the third SDP information sent by the second communication device;

Optionally, in this embodiment of the present application, the processor 110 is specifically configured to determine the first retention policy as the retention policy of the first data channel when the first retention policy is consistent with the second retention policy; or,

The processor 110 is specifically configured to determine the default retention strategy as the retention strategy for M data channels when the first retention strategy is inconsistent with the second retention strategy, or determine the retention strategy indicated by the second indication information as M Retention strategy for each data channel.

In the terminal provided by the embodiment of the present application, when M data channels are established with the second communication device, the data channel holding device determines the N data channels that need to be maintained among the M data channels; the terminal sends Hold request; wherein, the above hold request is used to hold N data channels; N is a positive integer, and M is greater than or equal to N. Through this method, when the terminal and the second communication device use at least one data channel, the terminal can determine which data channels need to be maintained, and send a hold request to the second communication device to maintain the data channels that need to be maintained. In this way, the communicating parties can accurately perform the holding operation on the data channels that need to be maintained, thereby ensuring the consistency of the data services transmitted by the communicating parties through the data channels, thereby improving user experience.

Take the second communication device as the terminal as an example. Among them, the radio frequency unit 101 is used to receive a hold request when M data channels are established between the first communication device and the second communication device; the hold request is used to hold N data channels that need to be maintained among the M data channels. ; Among them, N is a positive integer, and M is greater than or equal to N.

Optionally, in this embodiment of the present application, the processor 110 is configured to stop using the N data channels to send data to the first communication device according to the hold request.

Optionally, in this embodiment of the present application, the processor 110 is configured to, in the process of establishing M data channels between the first communication device and the second communication device, use the SDP information corresponding to the M data channels to communicate with the first communication device. A communication device negotiates retention policies corresponding to M data channels.

Optionally, in this embodiment of the present application, the M data channels include the first data channel; the radio frequency unit 101 is also used to receive the second SDP information sent by the first communication device;

The radio frequency unit 101 is also used to send the third SDP information;

The processor 110 is specifically configured to determine the default retention policy as the retention policy of the first data channel when the first retention policy and the second retention policy are inconsistent, or determine the retention policy indicated by the second indication information. It is the retention strategy of the first data channel.

In the terminal provided by the embodiment of the present application, when M data channels are established between the first communication device and the terminal, the data channel holding device receives a holding request; wherein, the above holding request is used to hold N data channels; N is A positive integer, M is greater than or equal to N. Through this method, when the first communication device and the terminal use at least one data channel, the terminal can maintain the data channel that needs to be maintained according to the hold request sent by the first communication device. In this way, the communicating parties can accurately perform the holding operation on the data channels that need to be maintained, thereby ensuring the consistency of the data services transmitted by the communicating parties through the data channels, thereby improving user experience.

An embodiment of the present application also provides a network side device, including a processor and a communication interface. The communication interface is used to receive a hold request when M data channels are established with the first communication device; the hold request is used to hold N data channels that need to be maintained among the M data channels;

Among them, N is a positive integer, and M is greater than or equal to N.

This network-side device embodiment corresponds to the above-mentioned second communication device-side method embodiment. Each implementation process and implementation manner of the above-mentioned method embodiment can be applied to this network-side device embodiment, and can achieve the same technical effect.

Specifically, the embodiment of the present application also provides a network side device. As shown in FIG. 12 , the network side device 200 includes: an antenna 21 , a radio frequency device 22 , a baseband device 23 , a processor 24 and a memory 25 . The antenna 21 is connected to the radio frequency device 22 . In the uplink direction, the radio frequency device 22 receives information through the antenna 21 and sends the received information to the baseband device 23 for processing. In the downlink direction, the baseband device 23 processes the information to be sent and sends it to the radio frequency device 22. The radio frequency device 22 processes the received information and then sends it out through the antenna 21.

The method performed by the network side device in the above embodiment can be implemented in the baseband device 23, which includes a baseband processor.

The baseband device 23 may include, for example, at least one baseband board on which multiple chips are disposed, as shown in FIG. Program to perform the network device operations shown in the above method embodiments.

The network side device may also include a network interface 26, which is, for example, a common public radio interface (CPRI).

Specifically, the network side device 200 in this embodiment of the present invention also includes: instructions or programs stored in the memory 25 and executable on the processor 24. The processor 24 calls the instructions or programs in the memory 25 to execute each of the steps shown in Figure 10. The method of module execution and achieving the same technical effect will not be described in detail here to avoid duplication.

Embodiments of the present application also provide a readable storage medium. Programs or instructions are stored on the readable storage medium. When the program or instructions are executed by a processor, each process of the above-mentioned data channel retention method embodiment is implemented, and can To achieve the same technical effect, to avoid repetition, we will not repeat them here.

Wherein, the processor is the processor in the terminal described in the above embodiment. The readable storage medium includes computer readable storage media, such as computer read-only memory ROM, random access memory RAM, magnetic disk or optical disk, etc.

An embodiment of the present application further provides a chip. The chip includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the above-mentioned data channel maintenance method. Each process in the example can achieve the same technical effect. To avoid repetition, we will not repeat it here.

It should be understood that the chips mentioned in the embodiments of this application may also be called system-on-chip, system-on-a-chip, system-on-chip or system-on-chip, etc.

Embodiments of the present application further provide a computer program/program product. The computer program/program product is stored in a storage medium. The computer program/program product is executed by at least one processor to implement the above data channel maintaining method. Each process of the embodiment can achieve the same technical effect, so to avoid repetition, it will not be described again here.

It should be noted that, in this document, the terms "comprising", "comprises" or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article or device that includes a series of elements not only includes those elements, It also includes other elements not expressly listed or inherent in the process, method, article or apparatus. Without further limitation, an element defined by the statement "comprises a..." does not exclude the presence of additional identical elements in a process, method, article or apparatus that includes that element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, but may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved. Functions may be performed, for example, the methods described may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus the necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases the former is better. implementation. Based on this understanding, the technical solution of the present application can be embodied in the form of a computer software product that is essentially or contributes to the existing technology. The computer software product is stored in a storage medium (such as ROM/RAM, disk , CD), including several instructions to cause a terminal (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute various embodiments of the present application. method described.

The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above-mentioned specific implementations. The above-mentioned specific implementations are only illustrative and not restrictive. Those of ordinary skill in the art will Inspired by this application, many forms can be made without departing from the purpose of this application and the scope protected by the claims, all of which fall within the protection of this application.

Claims

A method for maintaining a data channel, including:

When M data channels are established between the first communication device and the second communication device, the first communication device determines N data channels that need to be maintained among the M data channels;

The first communication device sends a hold request;

Wherein, the hold request is used to hold the N data channels;

N is a positive integer, and M is greater than or equal to N.
The method according to claim 1, wherein the hold request carries first Session Description Protocol SDP information;

Wherein, the first SDP information includes indication information of the N data channels;

The indication information is used to instruct to maintain the N data channels.
The method according to claim 2, wherein the first SDP information includes description information of the N data channels;

Wherein, the description information includes the instruction information.
The method according to claim 2 or 3, wherein the N data channels correspond to N pieces of indication information; the indication information corresponding to each of the N data channels is used to indicate maintaining the corresponding data channel.
The method according to claim 2 or 3, wherein the N data channels correspond to one indication information;

Wherein, the one indication information is used to indicate maintaining the N data channels.
The method of claim 1, wherein maintaining the N data channels includes any of the following:

The first communication device interrupts the transmission of data services of the N data channels;

The first communication device maintains transmission of data services of the N data channels.
The method according to claim 1, wherein the first communication device determines N data channels that need to be maintained among the M data channels, including:

The first communication device determines N data channels that need to be maintained from the M data channels based on the retention strategies corresponding to the M data channels;

Wherein, the retention strategy corresponding to any one of the M data channels is any of the following:

The retention strategy of the application corresponding to any of the data channels;

The first communication device and the second communication device pre-negotiate a maintenance strategy for any data channel;

stipulated in the agreement.
The method of claim 7, further comprising:

In the process of establishing the M data channels between the first communication device and the second communication device, the first communication device communicates with the second communication device through the SDP information corresponding to the M data channels. The communication device negotiates the retention policies corresponding to the M data channels.
The method of claim 8, wherein the M data channels include a first data channel;

The first communication device negotiates with the second communication device the maintenance strategy corresponding to the M data channels through the SDP information corresponding to the M data channels, including:

The first communication device sends second SDP information;

The first communication device receives the third SDP information sent by the second communication device;

The second SDP information includes first indication information, and the first indication information is used to indicate the first retention strategy corresponding to the first data channel;

The third SDP information includes second indication information, and the second indication information is used to indicate the second retention policy corresponding to the first data channel.
The method according to claim 9, wherein the first communication device negotiates with the second communication device the maintenance strategy corresponding to the M data channels through the SDP information corresponding to the M data channels, including:

In the case where the first retention policy is consistent with the second retention policy, determine the first retention policy as the retention policy of the first data channel; or,

In the case where the first retention policy is inconsistent with the second retention policy, the default retention policy is determined as the retention policy of the first data channel, or the retention policy indicated by the second indication information is determined as The retention strategy of the first data channel.
A method for maintaining a data channel, including:

When M data channels are established between the first communication device and the second communication device, the second communication device receives a hold request; the hold request is used to hold N of the M data channels that need to be held. data channel;

Among them, N is a positive integer, and M is greater than or equal to N.
The method according to claim 11, wherein after the second communication device receives the hold request, the method further include:

The second communication device stops using the N data channels to send data to the first communication device according to the hold request.
The method according to claim 11, wherein the hold request carries first Session Description Protocol SDP information;

Wherein, the first SDP information includes indication information of the N data channels;

The indication information is used to instruct to maintain the N data channels.
The method according to claim 11 or 13, wherein maintaining the N data channels includes any of the following:

The second communication device interrupts the transmission of data services of the N data channels;

The second communication device maintains transmission of data services of the N data channels.
The method of claim 11, wherein the method further includes:

In the process of establishing the M data channels between the first communication device and the second communication device, the second communication device communicates with the first communication device through the SDP information corresponding to the M data channels. The communication device negotiates the retention policies corresponding to the M data channels.
The method of claim 15, wherein the M data channels include a first data channel;

The second communication device negotiates with the first communication device the maintenance strategy corresponding to the M data channels through the SDP information corresponding to the M data channels, including:

The second communication device receives the second SDP information sent by the first communication device;

The second communication device sends third SDP information;

Wherein, the second SDP information includes first indication information, and the first indication information is used to indicate the first retention strategy corresponding to the first data channel;

The third SDP information includes second indication information, and the second indication information is used to indicate the second retention policy corresponding to the first data channel.
The method according to claim 16, wherein the second communication device negotiates with the first communication device the maintenance strategies corresponding to the M data channels through the SDP information corresponding to the M data channels, including:

In the case where the first retention policy is consistent with the second retention policy, determine the first retention policy as the retention policy of the first data channel; or,

In the case where the first retention policy is inconsistent with the second retention policy, the default retention policy is determined as the retention policy of the first data channel, or the retention policy indicated by the second indication information is determined as The retention strategy of the first data channel.
A data channel holding device, the device includes: a determining module and a sending module, wherein:

The determination module is configured to determine N data channels that need to be maintained among the M data channels when M data channels are established between the first communication device and the second communication device;

The sending module is used to send a hold request;

Wherein, the retention request is used to maintain the N data channels determined by the determination module;

N is a positive integer, and M is greater than or equal to N.
The device according to claim 18, wherein the hold request carries first Session Description Protocol SDP information;

Wherein, the first SDP information includes indication information of the N data channels;

The indication information is used to instruct to maintain the N data channels.
The device according to claim 19, wherein the first SDP information includes description information of the N data channels;

Wherein, the description information includes the instruction information.
The device according to claim 19 or 20, wherein the N data channels correspond to N pieces of indication information; the indication information corresponding to each of the N data channels is used to indicate maintaining the corresponding data channel.
The device according to claim 19 or 20, wherein the N data channels correspond to one indication information;

Wherein, the one indication information is used to indicate maintaining the N data channels.
The apparatus of claim 18, wherein maintaining the N data channels includes any of the following:

The first communication device interrupts the transmission of data services of the N data channels;

The first communication device maintains transmission of data services of the N data channels.
The device of claim 18, wherein:

The determination module is specifically configured to determine N data channels that need to be maintained from the M data channels based on the retention strategies corresponding to the M data channels;

Wherein, the retention strategy corresponding to any one of the M data channels is any of the following:

The retention strategy of the application corresponding to any of the data channels;

The first communication device and the second communication device pre-negotiate a maintenance strategy for any data channel;

stipulated in the agreement.
The device of claim 24, wherein:

The determining module is also configured to, in the process of establishing the M data channels between the first communication device and the second communication device, use the SDP information corresponding to the M data channels to determine the relationship between the M data channels and the M data channels. The second communication device negotiates maintenance policies corresponding to the M data channels.
The device according to claim 25, wherein the M data channels include a first data channel; the device further includes: a receiving module;

The sending module is also configured to send the second SDP information to the first communication device;

The receiving module is used to receive the third SDP information sent by the second communication device;

The second SDP information includes first indication information, and the first indication information is used to indicate the first retention strategy corresponding to the first data channel;

The third SDP information includes second indication information, and the second indication information is used to indicate the second retention policy corresponding to the first data channel.
The device of claim 26, wherein:

The determination module is specifically configured to determine the first retention strategy as the retention strategy of the first data channel when the first retention strategy is consistent with the second retention strategy; or,

The determination module is specifically configured to determine the default retention strategy as the retention strategy for the M data channels when the first retention strategy is inconsistent with the second retention strategy, or to determine the second retention strategy as the retention strategy. The retention strategy indicated by the indication information is determined as the retention strategy of the M data channels.
A data channel holding device includes: a receiving module;

The receiving module is used to receive a hold request when M data channels are established between the first communication device and the second communication device; the hold request is used to hold N of the M data channels that need to be maintained. data channel;

Among them, N is a positive integer, and M is greater than or equal to N.
The device according to claim 28, wherein the device further comprises: an execution module;

The execution module is configured to stop using the N data channels to send data to the first communication device according to the hold request.
The device according to claim 28, wherein the hold request carries first Session Description Protocol SDP information;

Wherein, the first SDP information includes indication information of the N data channels;

The indication information is used to instruct to maintain the N data channels.
The device according to claim 28 or 30, wherein said maintaining the N data channels includes any of the following:

The second communication device interrupts the transmission of data services of the N data channels;

The second communication device maintains transmission of data services of the N data channels.
The device according to claim 28, wherein the device further comprises: a determining module;

The determination module is configured to, in the process of establishing the M data channels between the first communication device and the second communication device, use the SDP information corresponding to the M data channels to determine the relationship between the M data channels and the M data channels. A communication device negotiates retention policies corresponding to the M data channels.
The device according to claim 32, wherein the M data channels include a first data channel; the device further includes: a sending module;

The receiving module is also configured to receive the second SDP information sent by the first communication device;

The sending module is used to send the third SDP information;

Wherein, the second SDP information includes first indication information, and the first indication information is used to indicate the first retention strategy corresponding to the first data channel;

The third SDP information includes second indication information, and the second indication information is used to indicate the second retention strategy corresponding to the first data channel.
The device of claim 33, wherein:

The determination module is specifically configured to determine the first retention strategy as the retention strategy of the first data channel when the first retention strategy is consistent with the second retention strategy; or,

The determination module is specifically configured to determine the default retention policy as the retention policy of the first data channel when the first retention policy is inconsistent with the second retention policy, or to determine the second retention policy as the retention policy. The retention strategy indicated by the indication information is determined as the retention strategy of the first data channel.
A communication device, including a processor and a memory. The memory stores programs or instructions that can be run on the processor. When the program or instructions are executed by the processor, the implementation of any one of claims 1 to 10 is achieved. The steps of the data channel maintaining method.
A communication device, including a processor and a memory, the memory stores a program or instructions that can be run on the processor, and when the program or instructions are executed by the processor, any one of claims 11 to 17 is implemented. The steps of the data channel maintaining method.
A readable storage medium, which stores programs or instructions. When the program or instructions are executed by a processor, the method for maintaining a data channel according to any one of claims 1-10 is implemented, or the method is implemented The steps of the data channel maintaining method according to any one of claims 11 to 17.
A computer program product, the program product is executed by at least one processor to implement the data channel maintaining method as described in any one of claims 1 to 10, or to implement the method as described in any one of claims 11 to 17 The steps of the data channel's hold method.
A chip, the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the data channel according to any one of claims 1-10 The method of maintaining the data channel, or the steps of implementing the method of maintaining the data channel according to any one of claims 11 to 17.