WO2012174904A1

WO2012174904A1 - Ims conference access method, device and system

Info

Publication number: WO2012174904A1
Application number: PCT/CN2012/072758
Authority: WO
Inventors: 顾泳飞
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-06-20
Filing date: 2012-03-21
Publication date: 2012-12-27
Also published as: CN102843336A

Abstract

Disclosed are an IMS conference access method, device and system, which are applied to the technical field of communications. When an IMS conference calls a user outside, a conference application server (AS) sends an access request message to a called user terminal through a video internetworking gateway (VIG), and receives an acknowledgment message returned by the called user terminal; acquires a performance parameter of the called user terminal from the acknowledgment message, and if it is determined, according to the performance parameter, that the called user terminal does not support video call, initiates a call receding procedure, and accesses the called user terminal to the IMS conference in an audio manner through a media gateway control function (MGCF). The method, device and system provided in embodiments of the present invention can access the user outside that does not support video conference call to the IMS conference in the audio manner.

Description

Method, device and system for IMS conference access

The present invention relates to the field of communications technologies, and in particular, to a method, device, and system for IMS conference access. Background technique

IMS (IP Multimedia Subsystem, IP Multimedia System) conference service is one of the important applications of IMS network. "Supporting mobile video access IMS conferencing system" is an important functional feature that can reflect the differentiation advantages of the IMS conference system over other traditional conference systems (such as H323 conferences) and enhance the competitiveness of IMS conference services. Therefore, both operators and users (especially group users) have an urgent need for this function.

According to the process of accessing the conference client in the prior art, it can be determined that the terminal supported by the current IMS conference service is mainly based on a fixed terminal, and it is not possible to support those who travel outside to participate in the conference anytime and anywhere, to a certain extent. Affecting the large-scale application of IMS conference services.

The IMS network communicates with the CS network voice, and the MGCF (Media Gateway Control Function, Media Gateway Control Function Video Gateway H equipment performs protocol and coding adaptation and conversion. The MGCF is responsible for the video telephony signaling of the mobile network and the IP network. The signaling between the mobile network MSC and the MGCF is ISUP (Integrated Services Digital Network User Part), and the SIP between the MGCF and the SIP (The Session Initiation Protocol) network is used. (Media GateWay, Media Gateway) Responsible for the conversion of different audio codes between mobile terminals and IP terminals. The audio aspects are mainly between G.72.11, G.711 encoding of IP networks and GSM-AMR encoding of mobile networks 3G-324M. Conversion.

The IMS network communicates with the video of the CS network, and the protocol and coding are adapted and converted by the VIG (Video Interworking Gateway) device. VIG is responsible for mobile networks and IP The videophone signaling transfer of the network, the signaling between the mobile network GMSC (Gateway Mobile Switching Center) and the VIG is ISUP, and the SIP between the VIG and the SIP network is adopted. In addition to being responsible for video telephony signaling, VIG is also responsible for the conversion of audio and video encoding between mobile terminals and IP terminals. The audio aspect is mainly the conversion between G.72.11 of the IP network and the GSM-AMR code of the mobile network 3G-324M. The video is mainly H.263 of the IP network and H.263 of the mobile network 3G-324M. 263, conversion between MPEG4.

In the IMS conference service, when the mobile terminal is called to participate in the conference, it is impossible to know whether the mobile terminal has video call capability, and the signaling and media cannot be correctly routed to the MGCF/MGW or VIG for processing.

Since the IMS conference service calls the 3G video terminal, if the CSCF forwards all SIP signaling to the MGCF, the video access function cannot be implemented because the MGW does not have the video codec. If the CSCF forwards all SIP signaling to the VIG for processing, it will also be a waste of resources for all audio conference calls to occupy the VIG video port. Summary of the invention

The embodiment of the invention provides a method, a device and a system for IMS conference access, which are used to solve the problem that the out-of-domain user terminal does not support the video conference call and cannot access the IMS conference in the prior art.

A method for IMS conference access, when an IMS conference calls an out-of-domain user, the method includes: the conference application server AS sends an access request message to the called user terminal through the video interworking gateway VIG, and receives an acknowledgement message returned by the called user terminal. ;

Obtaining a performance parameter of the called user terminal from the confirmation message, if it is determined that the called user terminal does not support the video call according to the performance parameter, initiate a call fallback process, and send the conference to the called user terminal again. Access request, and the mobile phone is connected to the IMS conference by audio through the media gateway control function MGCF.

A method for IMS conference access includes:

After receiving the multimedia conference access request sent by the user terminal, the MGCF according to the call class The type directly sends the access request to the conference AS or sends it to the conference AS through the VIG to trigger the IMS conference service;

The called user terminal authenticates the multimedia conference access request at the conference AS, and after the verification is passed, the conference AS accesses the IMS conference.

An IMS conference system, including conferences AS, VIG, and MGCF, where

The conference AS is configured to send an access request message to the called user terminal through the VIG, and receive an acknowledgement message returned by the called user terminal, and obtain performance parameters of the called user terminal from the acknowledgement message, according to the performance parameter. Determining that the called user terminal does not support the video call, and then initiates a call fallback process, and the called user terminal accesses the IMS conference by audio through the MGCF;

VIG, configured to receive and process an access request message sent by the conference AS;

The MGCF is configured to receive and process an access request message sent by the conference AS.

An IMS conference system, including an MGCF and a conference AS, where

The MGCF, after receiving the multimedia conference access request sent by the user terminal, directly sends the access request to the conference AS according to the call type or sends the conference to the conference through the VIG.

AS, triggers the IMS conference service;

The conference AS is configured to verify the multimedia conference access request, and after the verification is passed, access the user terminal to the IMS conference.

A conference AS includes a transceiver module and a conference processing module, where

The transceiver module is configured to send an access request message to the called user terminal through the VIG 302, and receive an acknowledgement message returned by the called user terminal;

The conference processing module is configured to obtain the performance parameter of the called user terminal from the confirmation message, and if it is determined that the called user terminal does not support the video call according to the performance parameter, initiate a call fallback process, and the called party is called by the MGCF. The user terminal accesses the IMS conference in audio mode.

An MGCF, including a routing module, configured to directly direct the multimedia according to a call type The conference access request is sent to the conference AS or sent to the conference AS through the VIG to trigger the IMS conference service.

The method, device, and system provided by the embodiments of the present invention can access an IMS conference by using an audio access mode for an out-of-band user terminal that does not support a video conference call. The solution provided by the embodiment of the present invention can enable an inviting 2G mobile phone, a 3G video mobile phone, a PSTN terminal, etc. to join an IMS conference. In addition, 2G mobile phones, 3G video mobile phones, and PSTN terminals can also actively dial the access code to join the IMS conference. DRAWINGS

1A is a schematic structural diagram of an application system of an IMS conference access method according to Embodiment 1 of the present invention;

1 is a schematic flowchart of a method for IMS conference access according to Embodiment 1 of the present invention; FIG. 2A is a schematic structural diagram of an application system of an IMS conference access method according to Embodiment 2 of the present invention;

FIG. 2 is a schematic flowchart of a method for IMS conference access according to Embodiment 2 of the present invention; FIG. 3 is a schematic structural diagram of a system for IMS conference access according to Embodiment 2 of the present invention. detailed description

An embodiment of the present invention provides a method for IMS conference access, where the method includes: when an IMS conference calls an out-of-domain user, the conference application server (AS) sends a conference access to a called user terminal through a video interworking gateway (VIG). Requesting, and receiving an acknowledgement message returned by the called user terminal; obtaining a performance parameter of the called user terminal from the confirmation message, and if it is determined according to the performance parameter that the called user terminal does not support the video call, initiating the call fallback The process, the called user terminal accesses the IMS conference by audio through the Media Gateway Control Function (MGCF).

An IMS conference access method provided by an embodiment of the present invention is a system outbound call and a terminal call Into the process. The outbound call of the system is: The user invites the called user terminal to join the conference through the WEB page or the PC client. The user terminal calls in: The user terminal actively dials the IMS conference number to join the IMS conference.

As shown in FIG. 1, the first embodiment, if the system initiates an IMS conference call, and the called user terminal is an out-of-domain user (the structure of the application system is as shown in FIG. 1A). The method for accessing an IMS conference provided by the embodiment of the present invention includes:

Step 101: The conference application server (AS) creates an IMS conference, and sends an INVITE message to the Call Session Contronl Function (CSCF) to invite the terminal to access the conference.

Step 102: The CSCF determines the type of the current conference call according to the access request message, and routes from the MGCF if it is an audio conference call, and routes from the VIG if it is a video conference call.

The CSCF network element determines, according to the audio and video conference call indication carried in the access request message, that the current conference call is a video conference call, and then routes the access request message to the MGCF through the VIG.

And the VIG converts the SIP message in the IMS conference into an ISUP message and implements the codec conversion of the audio and video in the IMS conference, and sends the converted ISUP message, such as an access request message, to the MGCF.

In the embodiment of the present invention, the specific implementation manner of step 102 is:

The INVITE message carries a corresponding audio and video conference call indication. For example: P-Service-Param: conf-uri= 123456@conf . com, conf-type=mmconf , where conf-type=mmconf is the video conference call indication, if it is an audio conference call, it is not carried

Step 103: After receiving the access request message, the called user terminal returns an acknowledgement message to the conference AS, where the acknowledgement message carries the performance parameter of the called user terminal.

Step 104: The conference AS obtains performance parameters of the called user terminal from the acknowledgement message. And determining, according to the performance parameter, whether the called user terminal supports a video call, if not, starting a call fallback process, and the called user terminal accesses the IMS conference by audio through the MGCF.

The videophone service call fallback refers to the fact that when the calling party initiates a video call, the video call falls back to the normal voice call for some reason, and the connection succeeds.

As shown in FIG. 2, in the second embodiment, if the system initiates an IMS conference call, the extra-domain user terminal needs to join the IMS conference call (the structure of the application system is as shown in FIG. 2A). A method for IMS conference access provided by the embodiment of the present invention is a mobile terminal, and the specific implementation method includes:

Step 201: The MGCF receives the multimedia conference access request sent by the mobile terminal. Step 202: The MGCF directly sends the multimedia conference access request to the conference AS according to the call type or sends the conference to the conference AS through the VIG to trigger the IMS conference service.

In the embodiment of the present invention, directly sending the access request to the conference AS according to the call type or sending the conference to the conference through the VIG includes:

The MGCF determines, according to the User Service Information (USI) and the Transmission Medium Requirement (TMR) information in the multimedia conference access request, whether the multimedia conference access request is a video conference call, and if yes, passes the The VIG sends the multimedia conference access request to the conference AS.

If the mobile terminal IMS conference access is implemented through the VIG, the VIG converts the SIP message in the IMS conference into an ISUP message and performs codec conversion of the audio and video.

Step 203: The conference AS verifies the multimedia conference access request, and after the verification is passed, accesses the mobile terminal to the IMS conference.

As shown in FIG. 3, according to the method in the first embodiment, an embodiment of the present invention further provides an IMS conference system, where the system includes conferences AS 301, VIG 302, and MGCF 303:

The conference AS 301 is configured to send an access request message to the called user terminal through the VIG 302. Receiving an acknowledgment message returned by the called user terminal, and obtaining a performance parameter of the called user terminal from the acknowledgment message, if it is determined that the called user terminal does not support the video call according to the performance parameter, the call fallback process is initiated, The called user terminal accesses the IMS conference by audio through the MGCF;

The VIG 302 is configured to receive and process an access request message, such as a video conference access request message, sent by the conference AS 301;

The VIG 302 is further configured to convert the SIP message in the IMS conference into an ISUP message and implement codec conversion of the audio and video in the IMS conference, and send the converted ISUP message to the MGCF 303.

The MGCF 303 is configured to receive and process an access request message, such as an audio conference access request message, sent by the conference AS 301.

In the related technology of the IMS conference service, when the called user terminal is engaged in the conference, since the called subscriber cannot know whether the video call capability is available, the signaling and the media cannot be correctly routed to the MGCF/MGW or VIG. The system further includes:

CSCF 304: Set to determine that the current conference call is a video conference call according to the audio and video conference call indication carried in the access request message, and then route the access request message to the MGCF through the VIG.

The method provided by the embodiment of the present invention can enable an inviting 2G mobile phone, a 3G video mobile phone, a PSTN terminal, etc. to join an IMS conference. In addition, 2G mobile phones, 3G video mobile phones, and PSTN terminals can also actively dial the access code to join the IMS conference.

The solution provided by the embodiment of the present invention carries the audio and video conference call identifier in the access request message, and solves the problem that if the CSCF forwards all SIP messages to the MGCF in the prior art, the video cannot be implemented because the MGW does not have the video codec conversion. Access function. If the CSCF forwards all SIP messages to the VIG for processing, it will also be a waste of resources for all audio conference calls to occupy the video port of the VIG. An embodiment of the present invention further provides an IMS conference system, including an MGCF and a conference AS, where

The MGCF, after receiving the multimedia conference access request sent by the user terminal, directly sends the access request to the conference AS according to the call type or sends the conference request to the conference AS through the VIG to trigger the IMS conference service;

The embodiment of the present invention further provides a conference AS, including a transceiver module and a conference processing module, where

The embodiment of the present invention further provides an MGCF, including a routing module, configured to directly send the multimedia conference access request to the conference AS according to the call type or send the conference to the conference AS through the VIG to trigger the IMS conference service.

It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the invention

Claims

Claim

1. An IP multimedia system IMS conference access method, when an IMS conference calls an off-domain user, including:

The conference application server AS sends an access request message to the called user terminal through the video interworking gateway VIG, and receives an acknowledgement message returned by the called user terminal.

Obtaining a performance parameter of the called user terminal from the confirmation message, if it is determined that the called user terminal does not support the video call according to the performance parameter, initiating a call fallback process, and the called user terminal is controlled by the media gateway control function MGCF Access the IMS conference in audio mode.

2. The method according to claim 1, wherein before the conference AS sends an access request message to the called user terminal through the VIG, the method further includes:

The conference AS sends an access request message to the VIG or media gateway control function MGCF.

3. The method according to claim 1, wherein before the conference AS sends the access request message to the VIG or the media gateway control function MGCF, the method further includes:

The conference AS creates an IMS conference and sends an access request message to the call session control function CSCF;

The CSCF determines that the current conference call is a video conference call according to the audio and video conference call indication carried in the conference access request, and sends the access request message to the VIG.

4. The method according to claim 1, 2 or 3, wherein the method further comprises: the VIG converting the session initiation protocol SIP message in the IMS conference to the ISUP message of the integrated service digital network user part and implementing the audio and video in the IMS conference The codec is converted and the converted ISUP message is sent to the MGCF.

5. A method for IMS conference access, comprising:

After receiving the multimedia conference access request sent by the user terminal, the MGCF directly sends the access request to the conference AS according to the call type or sends the conference request to the conference AS through the VIG to trigger the IMS conference service; The called user terminal authenticates the multimedia conference access request at the conference AS, and after the verification is passed, the conference AS accesses the IMS conference.

The method according to claim 5, wherein the sending the access request directly to the conference AS according to the call type or sending the conference to the conference through the VIG includes:

The MGCF determines whether the multimedia access request is a video conference call according to the user service information USI and the transmission medium request TMR information in the multimedia conference access request, and if yes, sends the access request to the conference AS through the VIG.

The method according to claim 5 or 6, wherein the method further comprises: converting, by the VIG, the SIP message in the IMS conference to an ISUP message and implementing codec conversion of the audio and video.

8. An IMS conference system, comprising a conference AS, a VIG, and an MGCF, wherein the conference AS is configured to send an access request message to the called user terminal through the VIG, and receive an acknowledgement message returned by the called user terminal, from the Acquiring the performance parameter of the called user terminal in the confirmation message, if it is determined that the called user terminal does not support the video call according to the performance parameter, the call fallback process is initiated, and the called user terminal accesses the IMS conference by audio through the MGCF. Medium

9. The system of claim 8, wherein the system further comprises:

The CSCF is configured to determine, according to the audio and video conference call indication carried in the access request message, that the current conference call is a video conference call, and the access request message is routed to the MGCF through the VIG.

10. The system according to claim 8 or 9, wherein the VIG is further configured to convert the SIP message in the IMS conference into an ISUP message and implement codec conversion of the audio and video in the IMS conference, and convert the converted ISUP The message is sent to the MGCF.

11. An IMS conference system, including an MGCF and a conference AS, wherein The MGCF, after receiving the multimedia conference access request sent by the user terminal, directly sends the access request to the conference AS according to the call type or sends the conference request to the conference AS through the VIG to trigger the IMS conference service;

12. A conference AS, comprising a transceiver module and a conference processing module, wherein

An MGCF, comprising a routing module, configured to directly send the multimedia conference access request to the conference AS according to the call type or send the conference to the conference AS through the VIG to trigger the IMS conference service.