CN117041217A - Intercommunication system and intercommunication method for realizing Web and IMS audio/video call - Google Patents

Intercommunication system and intercommunication method for realizing Web and IMS audio/video call Download PDF

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Publication number
CN117041217A
CN117041217A CN202311091229.6A CN202311091229A CN117041217A CN 117041217 A CN117041217 A CN 117041217A CN 202311091229 A CN202311091229 A CN 202311091229A CN 117041217 A CN117041217 A CN 117041217A
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CN
China
Prior art keywords
web
call
ims
user terminal
audio
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CN202311091229.6A
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Chinese (zh)
Inventor
黄攀
黄敏峰
陈军
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China Mobile Communications Group Co Ltd
China Mobile Hangzhou Information Technology Co Ltd
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China Mobile Communications Group Co Ltd
China Mobile Hangzhou Information Technology Co Ltd
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Priority to CN202311091229.6A priority Critical patent/CN117041217A/en
Publication of CN117041217A publication Critical patent/CN117041217A/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10—Architectures or entities
    • H04L65/1016—IP multimedia subsystem [IMS]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/1066—Session management
    • H04L65/1101—Session protocols
    • H04L65/1104—Session initiation protocol [SIP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/1066—Session management
    • H04L65/1101—Session protocols
    • H04L65/1108—Web based protocols, e.g. webRTC
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/80—Responding to QoS
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/08—Protocols for interworking; Protocol conversion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/643—Communication protocols

Abstract

The application relates to the technical field of audio and video communication, and provides an intercommunication system and an intercommunication method for realizing Web and IMS audio and video communication. The intercommunication system comprises a Web user terminal, an IMS core network, an SBC of an IMS domain, a Web call platform and an IMS user terminal; in the Web call platform, the WebSocket gateway is used for communicating with the Web user terminal to realize the registration and the conversion of call signaling; the landing gateway is used for communicating with the SBC of the IMS domain to realize signaling intercommunication; the call soft switch server is used for realizing the registration of the account number and the soft switch of the call; the media server is used for realizing media exchange forwarding according to the result of media negotiation in the call signaling. The intercommunication system solves the problem of difficult interconnection and intercommunication of the Web of the Internet domain and the IMS domain through the Web communication platform, and improves the flexibility of intercommunication of the Web of the Internet domain and the IMS domain.

Description

Intercommunication system and intercommunication method for realizing Web and IMS audio/video call
Technical Field
The application relates to the technical field of audio and video communication, in particular to an intercommunication system and an intercommunication method for realizing the audio and video communication between Web and IMS.
Background
The current IMS (IP Multimedia Subsystem ) network is gradually perfected along with the development of 4G and 5G, so that a telecommunication communication core network with wide coverage is formed, and a series of services such as instant messaging, real-time audio and video call, short multimedia message, color ring and the like can be provided. Meanwhile, the real-time audio and video communication technology is rapidly developed, particularly the WebRTC technology is widely disclosed, and real-time video communication application based on internet transmission is more continuously emerging. The realization of real-time audio and video call at the Web (World Wide Web) end is a convenient technology, but the realization of smooth trust of real-time audio and video between the Web end of the internet domain and the IMS domain has a certain difficulty, and a simple and convenient docking method is not provided.
In the scheme for realizing interconnection and interworking between the Web of the Internet domain and the IMS domain, the problems that session negotiation and real-time audio and video media transmission are not supported, service configuration depends on the capability of the IMS domain, and the interworking is inflexible exist.
Disclosure of Invention
The embodiment of the application provides an intercommunication system and an intercommunication method for realizing audio and video call of Web and IMS, which are used for solving the technical problems of difficult interconnection and intercommunication of Web and IMS in an Internet domain and low flexibility in the prior art.
In a first aspect, an embodiment of the present application provides an interworking system for implementing Web and IMS audio/video calls, including a Web user terminal, an IMS core network, an SBC of an IMS domain, a Web call platform, and an IMS user terminal, where the Web call platform includes a WebSocket gateway, a call soft switch server, a media server, and a floor gateway; the WebSocket gateway is used for communicating with the Web user terminal to realize the conversion of registration and call signaling; the landing gateway is used for communicating with the SBC of the IMS domain to realize signaling intercommunication; the call soft switch server is respectively connected with the WebSocket gateway and the floor gateway and is used for realizing the registration of an account number and the soft switch of a call; and the media server is connected with the call soft switch server and is used for sending the audio and video media sent by the Web user terminal to the SBC of the IMS domain or sending the audio and video media sent by the SBC of the IMS domain to the Web user terminal according to the result of media negotiation in the call signaling.
In one embodiment, the registration includes a direct mode and a proxy mode; when the direct connection mode is used, the Web user terminal registers an IMS domain taking an SBC as a boundary through a Web call platform by using an account number of the IMS domain; when the proxy mode is used, the Web user terminal logs in to the Web call platform by using an internet domain account, and the Web call platform logs in to an IMS domain through an SBC by using an IMS domain account corresponding to the internet domain account; and in the proxy mode, one IMS domain account proxy associates one or more Internet domain accounts, and one Web user terminal logs in a Web call platform by using one Internet account, so that the plurality of Web user terminals share one IMS domain account, and when a call from an IMS domain is received, the functions of simultaneous vibration and sequential vibration of the plurality of Web user terminals corresponding to the Internet accounts associated with the IMS domain accounts or the functions of simultaneous vibration and sequential vibration of the Web user terminals corresponding to a specified plurality of Internet accounts are realized by setting on a call soft switch server of the Web call platform.
In one embodiment, the media server is further configured to: if the media coding formats of the Web user terminal and the SBC of the IMS domain are inconsistent in the video negotiation, converting the inconsistent coding formats to realize media intercommunication of different coding formats.
In a second aspect, an embodiment of the present application provides a method for implementing intercommunication between Web and IMS audio/video call, where the method for implementing intercommunication between Web and IMS audio/video call includes: the Web user terminal sends a call request to a Web call platform based on a WSS protocol; the Web call platform analyzes the call request, extracts the calling number and the key media information from the call request, generates and sends a SIP protocol call request based on the key media information when the called party is an IMS domain number, and sends the SIP protocol call request to an IMS core network through an SBC; after receiving the SIP protocol call request, the IMS core network sends the SIP protocol call request to an IMS user terminal based on call routing logic; the IMS core network receives a first response message returned by the IMS user terminal, generates a second response message based on the first response message, returns the second response message and early media information, and reaches the Web call platform after passing through the SBC; early media information is used for early media negotiation; the Web call platform converts the second response message and the early media information into an early media signaling based on the WSS protocol, and sends the early media signaling to the Web user terminal.
In one embodiment, after sending the early media signaling to the Web user terminal, it includes: the Web call platform sends PRACK signaling based on the SIP protocol to the IMS core network through the SBC to confirm that early media information is received; the IMS core network returns a PRACK response message based on the SIP protocol to the Web call platform through the SBC so as to confirm that the PRACK signaling is received.
In one embodiment, after the IMS core network returns a PRACK response message based on the SIP protocol to the Web telephony platform via the SBC, the method includes: the IMS core network sends a UDPATE request based on an SIP protocol to the Web call platform through the SBC; the UDPATE request carries media information and is used for updating call information; the Web call platform converts the UPDATE request into an UPDATE signaling based on a WSS protocol, and sends the UPDATE signaling to a Web user terminal; the Web user terminal returns an Update response message based on the WSS protocol to confirm that Update signaling is received; the Update response message carries the result of responding to the Update early media negotiation; the Web call platform converts the Update response message into an Update response message based on the SIP protocol, and returns the Update response message to the IMS core network through the SBC to complete negotiation of early media Update.
In one embodiment, after sending the SIP protocol call request to the IMS user terminal based on the call routing logic, it comprises: after receiving the SIP protocol call request, the IMS user terminal rings to prompt an incoming call, and returns a Ring response message based on the SIP protocol, and the Ring response message reaches the Web call platform after passing through an IMS core network and an SBC; the Web call platform converts the Ring response message into a Ringing signaling based on a WSS protocol, and sends the Ringing signaling to a Web user terminal; the Web user terminal responds to the Ringing signaling to start receiving the early media, and the Web call platform can realize the transcoding function of the early media.
In one embodiment, after the Web user terminal starts receiving early media in response to Ringing signaling, the method includes: after the IMS user terminal answers, an INVITE response message based on the SIP protocol carrying media negotiation result information is returned, and the INVITE response message reaches the Web call platform after passing through an IMS core network and an SBC; the Web telephony platform converts the INVITE response message into an INVITE response message based on the WSS protocol, and transmits the INVITE response message to the Web user terminal.
In one embodiment, after sending the Invite response message to the Web user terminal, it comprises: after receiving the INVITE response message, the Web call platform returns an ACK signaling based on the SIP protocol, and the ACK signaling is sent to the IMS core network through the SBC to confirm that the INVITE response message is received; the system comprises a Web user terminal and a Web call platform, wherein the Web call platform and an IMS user terminal complete audio and video call signaling negotiation, and the Web user terminal and the IMS user terminal start to send and receive audio and video media; and the Web call platform forwards the received audio and video media of the two domains to the opposite domain.
In one embodiment, the Web telephony platform forwards received audio and video media of two domains to a counterpart domain, including: if the media formats in the negotiation result are inconsistent, the Web communication platform transmits the audio and video media with different formats to the two domains, and then the transcoded audio and video media are forwarded.
In one embodiment, the method for implementing intercommunication between Web and IMS audio/video call further comprises: when the audio-video call is ended, the Web user terminal sends a Hangup signaling based on a WSS protocol to hang up the call; the Web call platform converts the Hangup signaling into BYE signaling based on the SIP protocol, and the BYE signaling is obtained and reaches the IMS user terminal after passing through the SBC and the IMS core network; and the IMS user terminal responds to the BYE signaling and returns a BYE response message based on the SIP protocol so as to confirm the end of the audio/video call.
The intercommunication system and the intercommunication method for realizing the Web and IMS audio/video call provided by the embodiment of the application comprise a Web user terminal, an IMS core network, an SBC of an IMS domain, a Web call platform and an IMS user terminal; in the Web call platform, the WebSocket gateway is used for communicating with the Web user terminal to realize the registration and the conversion of call signaling; the landing gateway is used for communicating with the SBC of the IMS domain to realize signaling intercommunication; the call soft switch server is used for realizing the registration of the account number and the soft switch of the call; the media server is used for sending the audio and video media sent by the Web user terminal to the SBC of the IMS domain or sending the audio and video media sent by the SBC of the IMS domain to the Web user terminal according to the result of media negotiation in the call signaling. The intercommunication system can realize the conversion of the WSS protocol of the Web end of the Internet domain and the SIP protocol of the IMS domain, and can realize the conversion by means of registration and the like; and when the Web and the IMS are communicated, the service configuration gets rid of the dependence of the capability of the IMS domain, and improves the flexibility of the intercommunication of the Web and the IMS domain of the Internet domain.
Drawings
In order to more clearly illustrate the application or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the application, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an interworking system for implementing Web and IMS audio/video calls according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a Web call platform according to an embodiment of the present application;
fig. 3 is a flow chart of an interworking method for implementing Web and IMS audio/video call according to an embodiment of the present application;
fig. 4 is a signaling flow diagram of an interworking method for implementing Web and IMS audio/video call according to an embodiment of the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The application provides an intercommunication system for realizing Web and IMS audio/video call, which can be widely applied in the field of real-time audio/video intercommunication, and referring to FIG. 1, FIG. 1 is a schematic structural diagram of the intercommunication system for realizing Web and IMS audio/video call provided by the embodiment of the application.
In this embodiment, the interworking system for implementing the audio/video call between the Web and the IMS includes a Web user terminal, an IMS core network, an SBC (Session Border Controller ) of the IMS domain, a Web call platform, and an IMS user terminal.
The Web user terminal and the Web call platform belong to an Internet domain; the SBC, the IMS core network and the IMS user terminal belong to an IMS domain.
The IMS user terminal may be a 4G user VoLTE (Voice over Long-Term Evolution) terminal or a 5G user VoNR (Voice over New Radio, new air interface carried Voice) terminal. VoLTE is a voice solution for 4G networks; voNR is a target voice solution for 5G networks.
Alternatively, the IMS domain may also have other kinds of end-side users.
The internet domain is in butt joint with the IMS core network through the SBC of the IMS domain, and can be communicated with the IMS domain through pre-opening the allocated IMS domain account.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a Web call platform according to an embodiment of the present application. As shown in fig. 2, the Web call platform includes a WebSocket gateway, a call softswitch server, a media server and a landing gateway. Specifically:
And the WebSocket gateway is used for communicating with the Web user terminal to realize the registration and the conversion of call signaling.
WebSocket is a protocol that performs full duplex communication over a single TCP (Transmission Control Protocol ) connection. The WebSocket makes data exchange between the client and the server simpler, and allows the server to actively push data to the client.
The WebSocket gateway bears the WSS (WebSocket Security, secure WebSocket) protocol access function of the Web user terminal, and realizes the conversion of registration and call signaling, namely the conversion of the WSS protocol and the SIP protocol. The WSS protocol is used between the Web end and the WebSocket gateway, the WebSocket gateway is used for calling the soft switch server, and the SIP protocol (Session initialization Protocol ) is used between the Web end and the floor gateway and between the Web end and the SBC.
And the floor gateway is used for communicating with the SBC of the IMS domain so as to realize signaling intercommunication. The landing gateway is a network element which is in butt joint with the IMS domain SBC and is used for connecting the Internet domain and the IMS domain of the Web and Web call platform.
And the call soft switch server is respectively connected with the WebSocket gateway and the floor gateway and is used for realizing the registration of the account number and the soft switch of the call.
Optionally, the registration includes a direct mode and a proxy mode. When the direct connection mode is used, the Web user terminal registers an IMS domain taking an SBC as a boundary through a Web call platform by using an account number of the IMS domain; when the proxy mode is used, the Web user terminal logs in to the Web call platform by using the internet domain account, and the Web call platform logs in to the IMS domain through the SBC by using the IMS domain account corresponding to the internet domain account.
Agent mode: one IMS domain account proxy associates one or more Internet domain accounts, one Web user terminal logs in a Web call platform by using one Internet account, so that the plurality of Web user terminals share one IMS domain account, and when a call from an IMS domain is received, the function of simultaneous vibration and sequential vibration of the plurality of Web user terminals corresponding to the Internet accounts associated with the IMS domain accounts or the function of simultaneous vibration and sequential vibration of the Web user terminals corresponding to a designated plurality of Internet accounts is realized through setting on a soft switch server of the Web call platform.
The soft switch provides the functions of call control and processing, service processing (calling and called capability judgment, etc.), interconnection and intercommunication, operation maintenance, charging, etc. The call initiated by the Web user terminal to the IMS domain may be forwarded to the IMS domain, and the call of the Web user terminal to the Web user terminal may be forwarded to the IMS domain. The Web user terminal initiates a call to a call soft switch server, the soft switch server judges that the called number is an IMS domain account number, the call is transferred to the IMS domain through a landing gateway, and meanwhile, the code number of a calling party is replaced according to whether the call is in a direct connection mode or a proxy mode.
Specifically, the direct connection mode is not replaced, and the proxy mode needs to replace the user number OTT-usernames of the internet domain account with the user number IMS-usernames of the IMS domain account. The call from the IMS domain to the Web end can be transferred to the corresponding Web user terminal, and similarly, the called number of the call needs to be replaced according to a direct connection mode and a proxy mode, namely the direct connection mode is not replaced, and the proxy mode needs to replace the user number IMS-Username of the IMS domain account with the user number OTT-Username of the Internet domain account.
Wherein OTT is an abbreviation for Over the Top, indicating a mode in which the internet domain bypasses the legacy communication network element.
The eP-CSCF registered as the Web end directly connected with the IMS domain needs to be upgraded to support the WSS protocol, and the difficulty and the cost are higher. And the Web terminal is directly connected with the eP-CSCF, so that the fact that a plurality of Web terminals share one IMS domain account number cannot be realized, one Web terminal must monopolize one IMS code number resource, the simultaneous vibration and forward vibration logic of a plurality of Web terminals are realized, services of the IMS domain are required to support, and the intercommunication flexibility is limited. Meanwhile, media transcoding is not supported, so that a problem of failure of session negotiation due to inconsistent media formats may exist.
Based on this, when the call soft switch server of this embodiment adopts the proxy mode, it can support binding between multiple internet domain accounts and one IMS domain account, so as to realize that multiple Web user terminals share one IMS domain account, and can be configured on the Web call platform, so as to realize that multiple Web user terminals vibrate simultaneously or along logic when receiving a call from the IMS domain.
The media server is connected with the call soft switch server and used for media switch forwarding, namely, according to the result of media negotiation in the call signaling, the media server sends the audio and video media sent by the Web user terminal to the SBC of the IMS domain or sends the audio and video media sent by the SBC of the IMS domain to the Web user terminal.
Optionally, the media server may also be used for media transcoding: if the media coding formats of the Web user terminal and the SBC of the IMS domain are inconsistent in the video negotiation, converting the inconsistent coding formats to realize media intercommunication of different coding formats. Therefore, the compatibility problem of the Internet domain Web end and the IMS domain audio and video communication media can be solved through the media server.
The intercommunication system for realizing the Web and IMS audio/video call comprises a Web user terminal, an IMS core network, an SBC of an IMS domain, a Web call platform and an IMS user terminal; in the Web call platform, the WebSocket gateway is used for communicating with the Web user terminal to realize the registration and the conversion of call signaling; the landing gateway is used for communicating with the SBC of the IMS domain to realize signaling intercommunication; the call soft switch server is used for realizing the registration of the account number and the soft switch of the call; the media server is used for sending the audio and video media sent by the Web user terminal to the SBC of the IMS domain or sending the audio and video media sent by the SBC of the IMS domain to the Web user terminal according to the result of media negotiation in the call signaling. The intercommunication system can realize the conversion of the WSS protocol of the Web end of the Internet domain and the SIP protocol of the IMS domain, and can realize the conversion by means of registration and the like; and when the Web and the IMS are communicated, the service configuration gets rid of the dependence of the capability of the IMS domain, and improves the flexibility of the intercommunication of the Web and the IMS domain of the Internet domain.
The interworking system for implementing the audio/video call between the Web and the IMS provided by the present embodiment may execute the following method:
1. an access method of an Internet domain Web user terminal.
The Web user terminal is accessed to the Web call platform through a WSS protocol, and a WebSocket gateway in the Web call platform can support the WSS transmission protocol access and can be provided with a load balancing module (such as Nginx or F5). The login verification that the Web user terminal accesses the Web call platform can adopt a digest authentication mode to ensure that the legal Web user terminal can normally login.
2. An intercommunication method between an Internet domain Web user terminal and an IMS.
The user opens an account in the IMS domain in advance, which can be a fixed phone number of a personal user or an enterprise user, or a service number, and the like, and obtains an IMS domain account after opening the account, wherein the IMS domain account comprises an IMS domain user number (IMS-Username) and a Password (IMS-Password). There are two alternative modes of interworking between the Web user terminal and the IMS.
(1) Direct mode. The method comprises the steps that a Web user terminal logs in a Web call platform by using an IMS domain account number (IMS-usernames and IMS-Password), the Web call platform transfers a login request to an IMS domain for login verification, whether the login is successful is judged according to a result returned by the IMS domain, and the direct login of the Web user terminal to the IMS is realized.
(2) Agent mode. The obtained IMS domain accounts (IMS-usernames and IMS-Password) are stored on a Web call platform, and then the Internet domain accounts, including the Internet domain user numbers (OTT-usernames) and passwords (OTT-Password), are distributed to the Web user terminal, wherein the Internet domain accounts and the IMS domain accounts can be in one-to-one relationship or in many-to-one relationship. The Web user terminal logs in to the Web call platform by using the internet domain account number, the Web call platform performs login verification, after the verification is passed, the IMS domain account number corresponding to the internet domain account number is searched, and the Web call platform logs in to the IMS domain by using the IMS domain account number, so that the indirect login of the Web user terminal to the IMS is realized.
The login of the two modes is carried out, a Web user terminal login request is accessed to a Web call platform based on a WSS protocol, the Web call platform converts the login request into an SIP protocol, and the SIP protocol is sent to an IMS domain through an SBC. After direct login in a direct connection mode or indirect login in a proxy mode, the intercommunication between the Web user terminal and the IMS can be realized, namely, the Web user terminal can initiate a call to an IMS domain, and the call in the IMS domain can be routed to the Web user terminal.
3. The Web call signaling WSS and the IMS call signaling SIP are mutually converted.
(1) The Web calls to the IMS domain. The call request of the Web user terminal firstly arrives at a Web socket gateway of a Web call platform, the WSS protocol of the Web call can be analyzed on the gateway, necessary information such as a calling number, a called number, a call media description and the like is extracted, and the information is packed into an SIP protocol and then is sent to a call soft switch server. The call soft exchange server judges whether the call of the Web user terminal is to be directed to the IMS according to the called number, and judges whether the intercommunication method of the Web user terminal and the IMS is a direct connection mode or a proxy mode. If the mode is the direct connection mode, the SIP protocol call is directly forwarded to the SBC through the landing gateway and routed to the IMS domain. If the proxy mode is adopted, the OTT-usernames of the calling number Internet account are replaced by the IMS-usernames of the corresponding IMS domain account, and then the SIP protocol call is forwarded to the SBC through the landing gateway and routed to the IMS domain.
(2) The IMS domain calls the Web. When the IMS domain calls the Web user terminal, the IMS domain account number user number opened by the Web user terminal is dialed, and the SIP protocol call is transferred to a landing gateway of the Internet domain through the SBC and is routed to a call soft-switching server of the Web call platform. The call soft exchange server inquires whether the number is in a direct connection mode or a proxy mode according to the called number IMS-usernames. If the mode is the direct connection mode, the SIP protocol call is directly transferred to a WebSocket gateway accessed by the Web user terminal. If the proxy mode is adopted, the called number IMS-usernames is replaced by the corresponding internet domain account number OTT-usernames, and then the SIP protocol call is transferred to a WebSocket gateway accessed by the Web user terminal. After receiving the SIP call, the WebSocket gateway extracts necessary information such as calling number, called number, call media description and the like, packages the information into a WSS protocol, and sends the WSS protocol to the Web user terminal.
Whether the Web calls to the IMS domain or the IMS domain calls the Web, the subsequent signaling such as ringing, answering, hanging up and the like of a complete call is realized, and the mutual conversion of the WSS and the SIP signaling at the Web socket gateway is also realized.
4. The Web audio-video call media and the IMS audio-video call media are mutually converted.
When the Web user terminal negotiates with the IMS audio and video call signaling, media negotiation is carried out, specific negotiation information is carried in a media information part of the call signaling, and a call soft exchange server of the Web call platform can analyze and identify the media information and apply for media service resources in a corresponding format to the media server. The media server integrates audio and video codecs of different formats and can support the conversion of audio and video media streams of different coding formats. For example, audio coding, AMR-NB/WB of IMS domain 4G VoLTE and EVS of 5G VoNR, and the Web end uses Opus of WebRTC architecture, so that the inter-conversion of AMR-NB/WB of IMS domain, EVS and Opus format of Web end of Internet domain can be realized on a media server of a Web call platform. For video coding, the resolution ratio can reach 720P, the Web end WebRTC of the Internet domain does not support H.265, but adopts H.264, VP8, VP9 and AV1 formats, and the inter-conversion of the H.265 of the IMS domain and the VP8, VP9 and AV1 formats of the Web end of the Internet domain can be realized on a media server of a Web call platform.
Referring to fig. 3, fig. 3 is a flow chart of an interworking method for implementing an audio/video call between Web and IMS according to an embodiment of the present application. By using the intercommunication system for realizing the audio/video call between the Web and the IMS, the intercommunication method for realizing the audio/video call between the Web and the IMS in the embodiment comprises the following steps S110 to S150, wherein the steps are as follows:
S110: the Web user terminal sends a call request to the Web call platform based on the WSS protocol.
S120: the Web call platform analyzes the call request, extracts the calling number and the key media information from the call request, generates and sends a SIP protocol call request based on the key media information when the called party is the IMS domain number, and passes through the SBC to the IMS core network.
S130: after receiving the SIP protocol call request, the IMS core network sends the SIP protocol call request to the IMS user terminal based on the call routing logic.
S140: the IMS core network receives the first response message returned by the IMS user terminal, generates a second response message based on the first response message, returns the second response message and early media information, and reaches the Web call platform after passing through the SBC.
Early media information is used for early media negotiations.
S150: the Web call platform converts the second response message and the early media information into an early media signaling based on the WSS protocol, and sends the early media signaling to the Web user terminal.
In one embodiment, after sending the early media signaling to the Web user terminal, it includes: the Web call platform sends PRACK signaling based on the SIP protocol to the IMS core network through the SBC to confirm that early media information is received; the IMS core network returns a PRACK response message based on the SIP protocol to the Web call platform through the SBC so as to confirm that the PRACK signaling is received.
In one embodiment, after the IMS core network returns a PRACK response message based on the SIP protocol to the Web telephony platform via the SBC, the method includes: the IMS core network sends a UDPATE request based on an SIP protocol to the Web call platform through the SBC; the UDPATE request carries media information and is used for updating call information; the Web call platform converts the UPDATE request into an UPDATE signaling based on a WSS protocol, and sends the UPDATE signaling to a Web user terminal; the Web user terminal returns an Update response message based on the WSS protocol to confirm that Update signaling is received; the Update response message carries the result of responding to the Update early media negotiation; the Web call platform converts the Update response message into an Update response message based on the SIP protocol, and returns the Update response message to the IMS core network through the SBC to complete negotiation of early media Update.
In one embodiment, after sending the SIP protocol call request to the IMS user terminal based on the call routing logic, it comprises: after receiving the SIP protocol call request, the IMS user terminal rings to prompt an incoming call, and returns a Ring response message based on the SIP protocol, and the Ring response message reaches the Web call platform after passing through an IMS core network and an SBC; the Web call platform converts the Ring response message into a Ringing signaling based on a WSS protocol, and sends the Ringing signaling to a Web user terminal; the Web user terminal responds to the Ringing signaling to start receiving the early media, and the Web call platform can realize the transcoding function of the early media.
In one embodiment, after the Web user terminal starts receiving early media in response to Ringing signaling, the method includes: after the IMS user terminal answers, an INVITE response message based on the SIP protocol carrying media negotiation result information is returned, and the INVITE response message reaches the Web call platform after passing through an IMS core network and an SBC; the Web telephony platform converts the INVITE response message into an INVITE response message based on the WSS protocol, and transmits the INVITE response message to the Web user terminal.
In one embodiment, after sending the Invite response message to the Web user terminal, it comprises: after receiving the INVITE response message, the Web call platform returns an ACK signaling based on the SIP protocol, and the ACK signaling is sent to the IMS core network through the SBC to confirm that the INVITE response message is received; the system comprises a Web user terminal and a Web call platform, wherein the Web call platform and an IMS user terminal complete audio and video call signaling negotiation, and the Web user terminal and the IMS user terminal start to send and receive audio and video media; and the Web call platform forwards the received audio and video media of the two domains to the opposite domain.
In one embodiment, the Web telephony platform forwards received audio and video media of two domains to a counterpart domain, including: if the media formats in the negotiation result are inconsistent, the Web communication platform transmits the audio and video media with different formats to the two domains, and then the transcoded audio and video media are forwarded.
In one embodiment, the method for implementing intercommunication between Web and IMS audio/video call further comprises: when the audio-video call is ended, the Web user terminal sends a Hangup signaling based on a WSS protocol to hang up the call; the Web call platform converts the Hangup signaling into BYE signaling based on the SIP protocol, and the BYE signaling is obtained and reaches the IMS user terminal after passing through the SBC and the IMS core network; and the IMS user terminal responds to the BYE signaling and returns a BYE response message based on the SIP protocol so as to confirm the end of the audio/video call.
Referring to fig. 4, fig. 4 is a signaling flow diagram of an interworking method for implementing an audio/video call between Web and IMS according to an embodiment of the present application. The method specifically comprises the following steps:
scheme 1: the Web user terminal sends a call Invite request to a Web call platform based on a WSS protocol, the Web call platform analyzes and extracts key information such as a calling number, a called number, a media description and the like of the WSS protocol Invite request, recognizes that a called party of the call request is an IMS domain number, generates an SIP protocol call request Invite based on the extracted key media information, and sends the SIP protocol call request Invite to an IMS core network through an SBC. After receiving the SIP call request INVITE, the IMS core network sends the call request INVITE to an IMS user terminal based on call routing logic of the IMS core network, wherein the IMS user terminal can be 4G user VoLTE-UE or 5G user VoNR-UE.
Scheme 2: after receiving SIP INVITE call, IMS user terminal returns to SIP 100Tring, which indicates that call request is received and in process. The IMS core network sends the SIP 100Tring to the Web call platform after passing through the SBC.
Scheme 3: the IMS core network returns the SIP 183session progress to reach the Web call platform through the SBC. The SIP 183session progress indicates that the session is being processed, and at the same time carries early media information for early media negotiation, the Web telephony platform converts the SIP 183session progress protocol into WSS Earlymedia signaling to the Web user terminal.
Scheme 4: the Web call platform sends SIP PRACK signaling to the IMS core network through the SBC to confirm that the early media message is received.
Scheme 5: the IMS core network returns a SIP 200OK (PRACK) response to reach the Web call platform through the SBC, and confirms that the SIP PRACK signaling is received.
Flow 6: the IMS core network sends a SIP UDPATE request to UPDATE call information, the request can carry media information and is used for updating early media negotiation, and the Web call platform converts SIP UPDATE signaling into WSS UPDATE signaling and sends the WSS UPDATE signaling to the Web user terminal.
Scheme 7: the Web user terminal returns WSS Answer (Update) for responding to the WSS Update signaling, carrying the result of responding to the early media negotiation of Update, the Web call platform converts the signaling into SIP 200OK (Update) protocol and returns the SIP 200OK (Update) protocol to the IMS core network, and the negotiation of the early media Update is completed.
Scheme 8: after receiving the SIP call INVITE request, the IMS user terminal rings to prompt an incoming call, returns SIP 180Ring to the IMS core network, reaches a Web call platform through the SBC, converts the SIP 180Ring into a Ringing response based on a WSS protocol, and sends the Ringing response to the calling party Web user terminal, at the moment, the calling party starts to receive early media, and the Web call platform can realize the transcoding function of the early media.
Flow 9: after the IMS user terminal answers, a SIP 200OK (INVITE) signaling carrying the media negotiation result information is returned, and the signaling is transmitted to a Web call platform through an IMS core network and an SBC, and the Web call platform converts the signaling into a WSS Answer (INVITE) and sends the WSS Answer to the Web user terminal.
Flow 10: after receiving the SIP 200OK (INVITE) signaling, the Web session platform returns a SIP ACK signaling to the IMS core network, indicating that the SIP 200OK (INVITE) is received. At this time, the internet domain Web user terminal and the Web call platform, the Web call platform and the IMS domain user terminal complete the negotiation of the audio and video call signaling, the Web user terminal and the IMS domain user terminal start to transmit and receive the audio and video media, the Web call platform forwards the received audio and video media of the two domains to the opposite domain, and if the media formats in the negotiation result are inconsistent, the Web call platform transmits the audio and video media of different formats to the two domains, and then transcodes the audio and video media before forwarding the audio and video media.
Flow 11: when the audio and video call is ended, the Web user terminal sends WSS Hangup call, the Web call platform converts the signaling into SIP BYE signaling, and the SIP BYE signaling is sent to the IMS core network through the SBC, and finally the IMS user terminal is reached.
Flow 12: and the IMS user terminal returns a SIP 200OK (BYE) signaling response, and the audio and video call is ended.
Key points of the above embodiment include: 1. the Web user terminal, web call platform and SBC, IMS core network and IMS user terminal (such as 4G VoLTE terminal or 5G VoNR terminal) equipment of the IMS domain are networked.
2. The Web call platform consists of a WebSocket, a call soft switch server, a media server and a landing gateway: the WebSocket gateway bears WSS protocol access of the Web user terminal and conversion of the WSS protocol and the SIP protocol; the call soft switch server is used for realizing the registration of the account number and the soft switch of the call; the media server is used for media exchange forwarding and media transcoding; the floor gateway is a gateway for realizing signaling intercommunication by interfacing an Internet domain with an IMS domain SBC.
3. And realizing the mutual conversion between the Web call signaling WSS protocol and the IMS call signaling SIP protocol on the Web call platform.
4. The method comprises the steps of realizing the forwarding of Web audio and video call media and IMS audio and video call media on a Web call platform, and when the audio and video media negotiated at two ends are inconsistent (such as different coding formats), the Web call platform can also realize the conversion of media formats.
The application provides an intercommunication system and a method for realizing the audio-video call of Web and IMS, which support the audio-video intercommunication of Web and IMS domain, namely a system networking method; the method comprises the step of realizing the mutual conversion between a Web call protocol WSS and an IMS domain call signaling SIP on a Web call platform. The method also comprises that the Web terminal is registered and connected to the IMS domain by two methods, and the intercommunication with the IMS domain is realized, wherein the two methods are as follows: (1) direct mode. The Web user terminal directly uses the account number of the IMS domain, so that the Web user terminal registers with the IMS domain taking the SBC as a boundary through a Web call platform. (2) proxy mode. The Web user terminal firstly logs in the Web call platform by using the internet domain account number, and then the Web call platform registers in the IMS domain through the SBC by using the IMS domain account number corresponding to the internet domain account number. The proxy mode can support binding of a plurality of internet domain accounts and an IMS domain account, realize that a plurality of Web user terminal ends share an IMS domain account, and can be configured on a Web call platform to realize that a plurality of Web user terminal ends vibrate simultaneously or along when receiving a call from the IMS domain. The method further comprises the step of forwarding the Web audio-video call media and the IMS audio-video call media on the Web call platform, and the Web call platform can realize the conversion of media formats when the audio-video media negotiated at the two ends are inconsistent (such as different coding formats).
In another aspect, an embodiment of the present application further provides a computer program product, where the computer program product includes a computer program, where the computer program may be stored on a non-transitory computer readable storage medium, and when the computer program is executed by a processor, the computer is capable of executing the interworking method for implementing the Web-IMS audio-video call provided in the foregoing embodiments, where the method includes:
the Web user terminal sends a call request to a Web call platform based on a WSS protocol; the Web call platform analyzes the call request, extracts the calling number and the key media information from the call request, generates and sends a SIP protocol call request based on the key media information when the called party is an IMS domain number, and sends the SIP protocol call request to an IMS core network through an SBC; after receiving the SIP protocol call request, the IMS core network sends the SIP protocol call request to an IMS user terminal based on call routing logic; the IMS core network receives a first response message returned by the IMS user terminal, generates a second response message based on the first response message, returns the second response message and early media information, and reaches the Web call platform after passing through the SBC; early media information is used for early media negotiation; the Web call platform converts the second response message and the early media information into an early media signaling based on the WSS protocol, and sends the early media signaling to the Web user terminal.
The non-transitory computer readable storage medium may be any available medium or data storage device that can be accessed by a processor, including, but not limited to, magnetic storage (e.g., floppy disks, hard disks, magnetic tapes, magneto-optical disks (MOs), etc.), optical storage (e.g., CD, DVD, BD, HVD, etc.), and semiconductor storage (e.g., ROM, EPROM, EEPROM, nonvolatile storage (NAND FLASH), solid State Disk (SSD)), etc.
The intercommunication system and the intercommunication method for realizing the audio-video call between the Web and the IMS have the following advantages:
1. the Internet domain Web end is networked with the IMS domain through the Web call platform, and is registered with a direct connection mode and a proxy mode, so that the call service logic of the Web end can be realized more flexibly, and the service capability of the IMS domain service end is not required to be relied on.
2. The Web terminal WSS protocol of the internet domain and the SIP protocol of the IMS domain are mutually converted through the WebSocket access gateway, network elements of the IMS domain do not need to be upgraded and modified, and the intercommunication can be realized based on the original capability of the IMS domain.
3. The media server in the Web call platform can support media format conversion, provides better compatibility for the audio and video call of the Internet domain and the IMS domain, and solves the problem of audio and video communication session negotiation failure caused by media incompatibility.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims (11)

1. The intercommunication system for realizing the Web and IMS audio/video call is characterized by comprising a Web user terminal, an IMS core network, an SBC of an IMS domain, a Web call platform and an IMS user terminal, wherein the Web call platform comprises a WebSocket gateway, a call soft switch server, a media server and a floor gateway;
the WebSocket gateway is used for communicating with the Web user terminal to realize the conversion of registration and call signaling;
the landing gateway is used for communicating with the SBC of the IMS domain to realize signaling intercommunication;
the call soft switch server is respectively connected with the WebSocket gateway and the floor gateway and is used for realizing the registration of an account number and the soft switch of a call;
The media server is connected with the call soft switch server and is used for sending the audio and video media sent by the Web user terminal to the SBC of the IMS domain or sending the audio and video media sent by the SBC of the IMS domain to the Web user terminal according to the result of media negotiation in the call signaling.
2. The interworking system for implementing Web-to-IMS audio-video telephony according to claim 1, wherein the registration includes a direct mode and a proxy mode;
when the direct connection mode is used, the Web user terminal registers an IMS domain taking an SBC as a boundary through the Web call platform by using an account number of the IMS domain;
when a proxy mode is used, the Web user terminal logs in to the Web call platform by using an internet domain account, and the Web call platform logs in to an IMS domain through an SBC by using an IMS domain account corresponding to the internet domain account;
and the proxy mode is that one IMS domain account proxy associates one or more Internet domain accounts, one Web user terminal logs in the Web call platform by using one Internet account, so that the plurality of Web user terminals share one IMS domain account, and when a call from the IMS domain is received, the simultaneous vibration and the sequential vibration of the plurality of Web user terminals corresponding to the Internet accounts associated with the IMS domain account or the simultaneous vibration and the sequential vibration of the Web user terminals corresponding to a specified plurality of Internet accounts are realized through setting on a call soft switch server of the Web call platform.
3. The interworking system for implementing Web and IMS audio-video telephony according to claim 1, wherein the media server is further configured to:
if the media coding formats of the Web user terminal and the SBC of the IMS domain are inconsistent in the video negotiation, converting the inconsistent coding formats to realize media intercommunication of different coding formats.
4. An interworking method for implementing Web and IMS audio/video call, characterized in that an interworking system for implementing Web and IMS audio/video call according to any one of claims 1 to 3 is used, the interworking method for implementing Web and IMS audio/video call comprising:
the Web user terminal sends a call request to a Web call platform based on a WSS protocol;
the Web call platform analyzes the call request, extracts the calling number and the called number and the key media information from the call request, generates and sends a SIP protocol call request based on the key media information when the called party is an IMS domain number, and sends the SIP protocol call request to an IMS core network through an SBC;
after receiving the SIP protocol call request, the IMS core network sends the SIP protocol call request to an IMS user terminal based on call routing logic;
the IMS core network receives a first response message returned by the IMS user terminal, generates a second response message based on the first response message, returns the second response message and early media information to reach the Web call platform after passing through an SBC; the early media information is used for early media negotiation;
The Web call platform converts the second response message and the early media information into WSS protocol-based early media signaling and sends the early media signaling to the Web user terminal.
5. The method for implementing interworking between Web and IMS audio/video call according to claim 4, wherein after the sending the early media signaling to the Web user terminal, the method comprises:
the Web call platform sends a PRACK signaling based on an SIP protocol to the IMS core network through an SBC to confirm that the early media message is received;
and the IMS core network returns a PRACK response message based on the SIP to the Web call platform through the SBC so as to confirm that the PRACK signaling is received.
6. The method for implementing intercommunication between Web and IMS audio/video call according to claim 5, wherein after the IMS core network returns a PRACK response message based on SIP to the Web call platform via SBC, the method comprises:
the IMS core network sends a UDPATE request based on an SIP protocol to the Web call platform through an SBC; the UDPATE request carries media information and is used for updating call information;
the Web call platform converts the UPDATE request into an UPDATE signaling based on a WSS protocol, and sends the UPDATE signaling to the Web user terminal;
The Web user terminal returns an Update response message based on a WSS protocol to confirm that the Update signaling is received; the Update response message carries a result of responding to the Update early media negotiation;
the Web call platform converts the Update response message into an Update response message based on an SIP protocol, and returns the Update response message to the IMS core network through an SBC so as to complete negotiation of early media Update.
7. The method for implementing Web-IMS audio-video call interworking according to any one of claims 4 to 6, wherein after the sending the SIP protocol call request to the IMS user terminal based on the call routing logic, the method comprises:
after receiving the SIP protocol call request, the IMS user terminal rings to prompt an incoming call and returns a Ring response message based on the SIP protocol, and the Ring response message reaches a Web call platform after passing through the IMS core network and the SBC;
the Web call platform converts the Ring response message into a Ring signaling based on a WSS protocol, and sends the Ring signaling to the Web user terminal;
and the Web user terminal responds to the Ringing signaling to start receiving the early media, and the Web call platform can realize the transcoding function of the early media.
8. The method for implementing interworking between Web and IMS audio/video call according to claim 7, wherein after the Web user terminal starts receiving early media in response to the Ringing signaling, the method comprises:
after the IMS user terminal answers, an INVITE response message based on an SIP protocol carrying media negotiation result information is returned, and the INVITE response message reaches the Web call platform after passing through the IMS core network and the SBC;
the Web call platform converts the INVITE response message into an INVITE response message based on a WSS protocol, and sends the INVITE response message to the Web user terminal.
9. The method for implementing interworking between Web and IMS audio/video call according to claim 8, wherein after the Invite response message is sent to the Web user terminal, the method comprises:
after receiving the INVITE response message, the Web call platform returns an ACK signaling based on an SIP protocol, where the ACK signaling is sent to the IMS core network through an SBC to confirm that the INVITE response message is received;
the Web user terminal and the Web call platform complete audio and video call signaling negotiation with the IMS user terminal, and the Web user terminal and the IMS user terminal start to send and receive audio and video media; and the Web call platform forwards the received audio and video media of the two domains to the opposite domain.
10. The method for implementing intercommunication between Web and IMS audio/video call according to claim 9, wherein the Web call platform forwards the received audio/video media of the two domains to the opposite domain, comprising:
if the media formats in the negotiation result are inconsistent, the Web conversation platform transmits the audio and video media with different formats to the two domains, and then the transcoded audio and video media are forwarded.
11. The method for implementing intercommunication between Web and IMS audio/video call according to claim 10, further comprising:
when the audio-video call is ended, the Web user terminal sends a Hangup signaling based on a WSS protocol to hang up the call;
the Web call platform converts the Hangap signaling into BYE signaling based on an SIP protocol, and the BYE signaling is obtained and reaches the IMS user terminal after passing through an SBC and the IMS core network;
and the IMS user terminal responds to the BYE signaling and returns a BYE response message based on the SIP protocol so as to confirm the end of the audio/video call.
CN202311091229.6A 2023-08-28 2023-08-28 Intercommunication system and intercommunication method for realizing Web and IMS audio/video call Pending CN117041217A (en)

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