WO2012009909A1

WO2012009909A1 - Method and system for session initiation protocol terminal to attend multi-media conference

Info

Publication number: WO2012009909A1
Application number: PCT/CN2010/078798
Authority: WO
Inventors: 陈红领
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-07-21
Filing date: 2010-11-16
Publication date: 2012-01-26
Also published as: CN101895553A; CN101895553B

Abstract

A method for a Session Initiation Protocol (SIP) terminal to attend a multi-media conference is provided by the present invention, which includes: a message sent from the first SIP terminal for inviting the second SIP terminal to attend a multi-media conference is received, wherein the multi-media conference is created by the first SIP terminal (101); an invitation message is sent to the second SIP terminal, and a binding terminal of the second SIP terminal is called (102); after a media channel between the binding terminal receiving the call and a Media Resources Server (MRS) is established, a call status of the binding terminal is notified to the second SIP terminal (103); after the second SIP terminal receives the call status of the binding terminal, a subscription signal for subscribing conference information of the multi-media conference is received from the second SIP terminal, and the conference information of the multi-media conference is sent to the second SIP terminal (104). A Conference Application Server (Conf AS) and a system for a SIP terminal to attend a multi-media conference are also provided by the present invention. The method provided by the present invention can save resources, simplify processing procedures, and reduce processing time.

Description

^^Startup Protocol Method and system for SIP terminal to participate in multimedia ^ i meaning

The embodiments of the present invention relate to the field of communications technologies, and in particular, to a method and system for a SIP terminal to participate in a multimedia conference in the field. Background technique

In the Internet Protocol Multimedia Subsystem (IMS) network, multimedia conferencing is a comprehensive conference that provides three functions of audio, video and data coordination and multi-party control. Among them, data collaboration includes applications such as application sharing, electronic whiteboard, and web page sharing.

In practical applications, the multimedia conference function is provided to the user as a value-added service. In the IMS network, the existing multimedia conference mainly implements the SIP (Session Initiation Protocol) signaling to implement the function of the SIP terminal to use the multimedia conference. . However, the SIP signaling has certain limitations. In order to support the function of the multimedia conference by the binding terminal of the SIP terminal, two sets of SIP signaling are required to respectively call the SIP terminal and the binding terminal. In this case, the IMS core network is Two sets of SIP signaling need to be processed in one call process. For the network elements involved in the IMS network, the processing flow is complicated, takes a long time, and wastes a lot of resources. Moreover, the SIP terminal and the binding terminal are respectively called in the IMS network, and the network elements involved in the IMS network need to make corresponding adjustments corresponding to the two sets of SIP signaling, which has a large amount of engineering transformation and wastes a large amount of resources. Summary of the invention

The embodiment of the invention provides a method and a system for a session initiation protocol SIP terminal to participate in a multimedia conference, which can simplify the processing flow and shorten the processing time, thereby saving resources.

A method for a SIP terminal to participate in a multimedia conference, comprising: Receiving, by the first SIP terminal, information for inviting the second SIP terminal to participate in the multimedia conference, where the multimedia conference is created by the first SIP terminal;

Sending the invitation information to the second SIP terminal, and calling the binding terminal of the second SIP terminal; after the binding terminal receiving the next call establishes a media channel with the media resource server MRS, the call state of the binding terminal is notified to the second SIP terminal;

After receiving the call state of the binding terminal, the second SIP terminal receives the subscription signaling of the site information of the multimedia conference by the second SIP terminal, and sends the site information of the multimedia conference to the second SIP terminal.

The multimedia conference is created by the first SIP terminal, and specifically includes:

Receiving signaling for creating a multimedia conference initiated by the first SIP terminal, and transmitting the media resource information of the first SIP terminal to the MRS, and sending the media resource information of the MRS to the first SIP terminal;

When the first SIP terminal and the MRS respectively confirm the media resource information of the other party, it is confirmed that the media channel is established between the first SIP terminal and the MRS, and the multimedia conference is successfully created.

The receiving the signaling for creating the multimedia conference initiated by the first SIP terminal specifically includes: receiving signaling for creating a multimedia conference initiated by the first SIP terminal by using a hypertext transfer protocol HTTP.

The signaling for creating a multimedia conference includes a set of any one or more of the following: a conference type, a conference theme, a conference creator, a conference duration, and a conference number;

The media resource information includes a set of any one or more of the following: a media port, a media IP address, and a resource reservation.

The binding terminal and the media resource server MRS establish a media channel, and the method includes: receiving 183 signaling sent by the binding terminal, acquiring media information of the binding terminal, and invoking the media information of the binding terminal by inviting the Invite signaling Send to MRS;

Receiving the MRS to obtain the media information of the MRS through the 183 signaling; Pre-confirming the media information of the MRS and the media information of the binding terminal by using Prack signaling; confirming the result of the signaling link negotiation with the MRS through the 200 Invite/ACK ACK signaling; and transmitting the binding terminal through the 180 ringing Ring signaling Ringing signaling

Pre-confirming the ringing signaling by using Prack signaling, and notifying the second SIP terminal of the ringing state of the binding terminal;

Receiving 200Invite signaling sent after the binding terminal goes off-hook;

The ACK signaling is fed back to the binding terminal, and a media channel is established between the binding terminal and the MRS. A conference application server, Conf AS, includes a receiving unit, a sending unit, a notification unit, and a subscription unit, where:

a receiving unit, configured to receive, by the first SIP terminal, information for inviting the second SIP terminal to participate in the multimedia conference, where the multimedia conference is created by the first SIP terminal;

a sending unit, configured to send the invitation information to the second SIP terminal, and call the binding terminal of the second SIP terminal;

a notification unit, configured to: after the binding terminal that receives the next call establishes a media channel with the media resource server MRS, notify the second SIP terminal of the call state of the binding terminal;

a subscription unit, configured to: after the second SIP terminal receives the call state of the binding terminal, receive the subscription signaling of the site information of the multimedia conference by the second SIP terminal, and send the site information of the multimedia conference to the second SIP terminal.

The sending unit includes a receiving subunit and an confirming subunit, wherein:

a receiving subunit, configured to receive signaling for creating a multimedia conference initiated by the first SIP terminal, and send media resource information of the first SIP terminal to an MRS, and send media resource information of the MRS to the a SIP terminal;

The confirmation subunit is configured to: when receiving the confirmation information of the media resource information of the first SIP terminal and the MRS to the other party, confirm that the media channel is established between the first SIP terminal and the MRS, and the multimedia conference is successfully created. The receiving subunit is specifically configured to: receive signaling for creating a multimedia conference initiated by the first SIP terminal by using a hypertext transfer protocol HTTP.

The notification unit is specifically configured to:

Receiving the 183 signaling sent by the binding terminal, acquiring the media information of the binding terminal, and sending the media information of the binding terminal to the MRS by inviting the Invite signaling;

Receiving the MRS to obtain the media information of the MRS through the 183 signaling;

Pre-confirming the media information of the MRS and the media information of the binding terminal by using Prack signaling; confirming the result of the signaling link negotiation with the MRS through the 200 Invite/ACK ACK signaling; and transmitting the binding terminal through the 180 ringing Ring signaling Ringing signaling

Receiving 200Invite signaling sent after the binding terminal goes off-hook;

The ACK signaling is fed back to the binding terminal, and a media channel is established between the binding terminal and the MRS. A session initiation protocol A system in which a SIP terminal participates in a multimedia conference includes a first SIP terminal, a conference application server Conf AS, a second SIP terminal, a media resource server MRS, and a binding terminal, where:

a first SIP terminal, configured to invite the second SIP terminal to participate in the multimedia conference by using the Conf AS, where the multimedia conference is created by the first SIP terminal;

a conference application server, configured to send a conference invitation to the second SIP terminal, and to call the binding terminal of the second SIP terminal; and notify the second SIP terminal of the call state of the binding terminal; Receiving a meeting invitation, subscribing to and receiving site information of the multimedia conference, and participating in the multimedia conference;

MRS, used to establish a media channel through the conference application server and the binding terminal;

The binding terminal is configured to receive a call of the conference application server, and establish a media channel by using the conference application server and the MRS. The first SIP terminal is specifically configured to: exchange, with the MRS, the respective media resource information by the conference application server; when the first SIP terminal and the MRS respectively confirm the media resource information of the other party, the first SIP terminal establishes a media channel with the MRS, where The multimedia conference was created successfully.

The first SIP terminal is specifically configured to: initiate signaling for creating a multimedia conference by using a hypertext transfer protocol HTTP.

The binding terminal is specifically configured to: receive a next call of the conference application server, send the media information of the conference to the conference application server by using the 183 signaling; and send the ringing signaling by using the 180 ringing Ring signaling, and send the a conference application server; and, after off-hook, issue 200Invite signaling to the conference application server;

The conference application server is specifically configured to: initiate a call to the binding terminal, and send the media information of the bound terminal to the MRS by inviting the Invite signaling; and use the Prack signaling to media information of the MRS and the binding terminal. Pre-confirming the media information; and pre-confirming the ringing signaling by using the Prack signaling, and notifying the second SIP terminal of the ringing state of the binding terminal; and feeding back the ACK signaling to the binding terminal;

The MRS is specifically configured to: send the media information of the device to the conference application server by using the 183 signaling; and confirm the signaling link negotiation result by using the 200 Invite/ACK ACK signaling between the conference application servers.

In the embodiment of the present invention, the information sent by the first SIP terminal to invite the second SIP terminal to participate in the multimedia conference is received, where the multimedia conference is created by the first SIP terminal; the invitation information is sent to the second SIP terminal, and the call is sent. Binding terminal of the SIP terminal; after the binding terminal receiving the next call establishes a media channel with the media resource server MRS, notifying the second SIP terminal of the call state of the binding terminal; receiving the call of the binding terminal at the second SIP terminal After the status, the second SIP terminal receives the subscription signaling of the conference site information of the multimedia conference, and sends the conference site information of the multimedia conference to the second SIP terminal. In the embodiment of the present invention, only a set of SIP signaling is required for the second SIP terminal and its bound terminal, and two sets of SIP signaling are not required to respectively call the second SIP terminal. And the binding terminal, for the network element involved in the IMS network, simplifies the processing flow, shortens the process occupation time, and saves resources. Moreover, the network elements involved in the IMS network do not need to be correspondingly adjusted corresponding to the two sets of SIP signaling, and can also save a lot of resources. DRAWINGS

1 is a flowchart of a method for a SIP terminal to participate in a multimedia conference according to the present invention;

2 is a schematic diagram of a network environment of a method for a SIP terminal to participate in a multimedia conference according to the present invention; FIG. 3 is a flowchart of a specific example of a method for a SIP terminal to participate in a multimedia conference according to the present invention; FIG. FIG. 5 is a schematic diagram of a specific signaling interaction of a method for a SIP terminal to participate in a multimedia conference according to the session initiation protocol of the present invention;

6 is a schematic diagram of a conference control process involved in the SIP terminal B participating in the multimedia conference according to the present invention; FIG. 7 is a schematic structural diagram of a conference application server Conf AS according to the present invention;

8 is a schematic structural diagram of a receiving unit in a conference application server according to the present invention; and FIG. 9 is a schematic structural diagram of a system in which a SIP terminal participates in a multimedia conference according to the present invention. detailed description

In the prior art, the SIP signaling has certain limitations. To support the binding terminal of the SIP terminal to use the multimedia conference function, two sets of SIP signaling are required to respectively call the SIP terminal and the binding terminal. In this case, the IMS core network Two sets of SIP signaling need to be processed in a call flow. For the network elements involved in the IMS network, the processing flow is complicated, takes a long time, and wastes a large amount of resources. In the IMS network, the SIP terminal and the binding are respectively called. For the terminal, the network elements involved in the IMS network need to be correspondingly adjusted according to two sets of SIP signaling, which has a large amount of engineering transformation and wastes a lot of resources. To solve the above technical problem, the embodiment of the present invention provides a method for a SIP terminal to participate in a multimedia conference. The specific implementation process is as shown in FIG. 1 , and includes:

Step 101: Receive an invitation sent by the first SIP terminal to join the second SIP terminal to participate in the multimedia conference. The information, multimedia conference is created by the first SIP terminal.

The step of the present invention includes: receiving signaling for creating a multimedia conference initiated by the first SIP terminal, and transmitting the media resource information of the first SIP terminal to the MRS, and transmitting the media resource information of the MRS to the first SIP terminal; When the first SIP terminal and the MRS respectively confirm the media resource information of the other party, it is confirmed that the media channel is established between the first SIP terminal and the MRS, and the multimedia conference is successfully created.

In an embodiment, the receiving, by the first SIP terminal, the signaling for creating a multimedia conference comprises: receiving signaling for creating a multimedia conference initiated by the first SIP terminal by using a hypertext transfer protocol (HTTP).

In one embodiment, the signaling for creating a multimedia conference includes a collection of any one or more of the following: a conference type, a conference topic, a conference creator, a conference duration, and a conference number.

The media resource information includes a collection of any one or more of the following: media port, media IP address, resource reservation.

Step 102: Send the invitation information to the second SIP terminal, and call the binding terminal of the second SIP terminal.

Step 103: After the binding terminal that receives the next call establishes a media channel with the media resource server MRS, notify the second SIP terminal of the call state of the binding terminal.

In this step, the binding terminal establishes a media channel with the media resource server MRS, and specifically includes: receiving 183 (Session Description Protocol SDP) signaling sent by the binding terminal, acquiring media information of the binding terminal, and inviting Invite (SDP) Signaling sends the media information of the bound terminal to

MRS;

Receiving MRS to obtain media information of the MRS through 183 (SDP) signaling;

Pre-confirming the media information of the MRS and the media information of the binding terminal by using Prack signaling; confirming the result of the signaling link negotiation with the MRS through the 200 Invite/ACK ACK signaling; and transmitting the binding terminal through the 180 ringing Ring signaling Ringing signaling Pre-confirming the ringing signaling by using Prack signaling, and notifying the second SIP terminal of the ringing state of the binding terminal;

Receiving 200Invite signaling sent after the binding terminal goes off-hook;

The ACK signaling is fed back to the binding terminal, and a media channel is established between the binding terminal and the MRS. Step 104: After receiving the call state of the binding terminal, the second SIP terminal receives the subscription signaling of the site information of the multimedia conference by the second SIP terminal, and sends the site information of the multimedia conference to the second SIP terminal.

In a specific embodiment, the network element includes: a first SIP terminal, a second SIP terminal, a binding terminal of the second SIP terminal, a conference application server (Conf AS, Conference Application Server), and a media resource server (MRS, Media) Resourse Server ) „ To describe the connection relationship of each network element more directly and conveniently, take SIP terminal A as the first SIP terminal, take SIP terminal B as the second terminal, and take terminal C as the binding terminal of SIP terminal B. For the connection relationship between the NEs, see Figure 2, where SIP terminal A is the creator and host of the multimedia conference. The specific processing flow of the above five network elements using the method shown in Figure 1 is as shown in Figure 3.

Step 301: The SIP terminal A invites the SIP terminal B to participate in the multimedia conference through the conference application server Conf AS, and the multimedia conference is created by the SIP terminal A.

Step 302: The Conf AS sends the conference invitation to the SIP terminal B, and calls the binding terminal C of the SIP terminal B.

Step 303: The binding terminal C receives the next call of the Conf AS, and establishes a media channel by using the Conf AS and the media resource server MRS.

Step 304: The Conf AS notifies the SIP terminal B of the call state of the binding terminal C.

Step 305: The SIP terminal B subscribes to and receives the conference site information of the multimedia conference, and successfully participates in the multimedia conference.

In the implementation, the binding terminal C is the binding terminal of the SIP terminal B. When the SIP terminal B participates in the conference, the binding terminal C is the actual party. The binding terminal C can be a fixed line or a mobile phone. SIP terminal and so on.

In step 301, the multimedia conference is created by the SIP terminal A, and the specific creation process is as shown in FIG. 4, including:

Step 401: The Conf AS receives the signaling for creating a multimedia conference initiated by the SIP terminal A, and the SIP terminal A and the MRS exchange respective media resource information by using the Conf AS.

Step 402: When the SIP terminal A and the MRS respectively confirm the media resource information of the other party, the media channel is established between the SIP terminal A and the MRS, and the multimedia conference is successfully created.

In one embodiment, when the SIP terminal A creates a multimedia conference by using the process shown in FIG. 4, the SIP terminal A initiates signaling for creating a multimedia conference by using a HyperText Transfer Protocol (HTTP). In the prior art, since the SIP signaling is limited by the User Datagram Protocol (UDP), the length of the transportable packet cannot exceed 1300 bytes. When the negotiated media packet length exceeds 1300 bytes, The media signaling packet is truncated, and thus the multimedia conference cannot be created, and the multimedia conference function cannot be used by the user. In the embodiment of the present invention, the SIP terminal A initiates signaling for creating a multimedia conference by using HTTP. The HTTP is not limited to UDP, and there is no limitation that the length of the media packet cannot exceed 1300 bytes, so that the media signaling packet is avoided. The truncation phenomenon makes the multimedia conference function more stable.

In implementation, the signaling for creating the multimedia conference includes a collection of any one or more of the following: conference type, conference topic, conference creator, conference duration, number of conferences; the media resource information includes a collection of any one or more of the following: Media port, media IP address, resource reservation. Among them, the type of meeting usually includes two types of audio or video.

The SIP terminal A creates a multimedia conference, and exchanges media resource information with the MRS through the Conf AS. The SIP signaling involved includes: 183 (SDP offer (Session Description Protocol)), Invite (SDP), Prack (SDP) /200Prack, Update Update (SDP) /200Update (SDP), 200OK, ACK, etc. In implementation, after SIP terminal A creates a multimedia conference, a media channel is established with the MRS. The binding terminal C receives the next call of the Conf AS, and establishes a media channel through the Conf AS and the media resource server MRS. The SIP signaling involved includes: 183 (SDP offer), invite (SDP), Prack (SDP)/200Prack, Update ( SDP) /200Update (SDP), 200OK, ACK, etc.

As shown in Figure 3, in step 303, the binding terminal C receives the call from the Conf AS, and establishes a media channel through the Conf AS and the media resource server MRS, including:

The binding terminal C receives the next call of the Conf AS, and sends its own media information to the Conf AS through 183 (SDP) signaling, and the Conf AS sends the media information of the binding terminal C to the MRS through Invite (SDP) signaling. ;

The MRS sends its own media information to the Conf AS through 183 (SDP) signaling;

Conf AS uses PRACK signaling to pre-confirm the media information of the MRS and the media information of the binding terminal C;

The signaling link negotiation result is confirmed by the 200Invite/ACK ACK signaling between the MRS and the Conf AS;

Binding terminal C sends ringing signaling through 180 ringing Ring signaling and sends it to Conf AS;

The Conf AS pre-confirms the ringing signaling by using the PRACK signaling, and notifies the SIP terminal B of the ringing state of the binding terminal C;

After the terminal C picks up the phone, it sends 200Invite signaling to the Conf AS.

If the Conf AS feeds back ACK signaling, a media channel is established between the binding terminal C and the MRS. In order to let the user know more clearly the method for the session initiation protocol SIP terminal to participate in the multimedia conference provided by the embodiment of the present invention, the embodiment of the present invention uses a signaling transmission diagram to be discussed in detail. For details, refer to FIG. 5, which includes the following steps:

Step 501: SIP terminal A sends an HTTP session to create a multimedia conference CreateConfReq letter to Conf AS;

Step 502, the Conf AS sends Invite signaling to the SIP terminal A; Step 503, the SIP terminal A sends 183 (SDP offer) signaling to the Conf AS;

Step 504: The Conf AS sends Invite (SDP) signaling to the MRS.

Step 505, MRS feedback 183 (SDP) signaling to Conf AS;

Step 506: The Conf AS sends Prack (SDP) /200Prack signaling to the MRS.

Step 507, the Conf AS sends Prack (SDP) /200Prack signaling to the SIP terminal A; Step 508, the SIP terminal A sends an Update Update (SDP) /200Update (SDP) signal to the Conf AS;

Step 509, the Conf AS sends Update (SDP) /200Update (SDP) signaling to the MRS; Step 510, the SIP terminal A sends 200 OK signaling to the Conf AS;

Step 511: The Conf AS sends 200 OK signaling to the MRS.

Step 512: The MRS feeds back ACK signaling to the Conf AS.

Step 513: The Conf AS feeds back ACK signaling to the SIP terminal A.

So far, a media channel is established between the SIP terminal A and the MRS.

Step 514, the Conf AS sends the HTTP CreateConfReq signaling to the SIP terminal A; Step 515, the SIP terminal A sends the subscription site information signaling Subscribe/200Subscribe signaling to the Conf AS;

Step 516, the Conf AS sends a notification Notify/200Notify signaling to the SIP terminal A; Step 517, the SIP terminal A sends the invitation information Message MemberlnviteReq signaling to the Conf AS;

Step 518, the Conf AS feeds back 200Message signaling to the SIP terminal A;

Step 519, the Conf AS sends an invitation to notify the Message ConfURINotify signaling to the SIP terminal B;

Step 520: The SIP terminal B feeds back 200Message signaling to the Conf AS.

Step 521, the Conf AS sends Invite signaling to the binding terminal C;

Step 522, binding terminal C feedback 183 (SDP offer) signaling to the Conf AS; Step 523: The Conf AS sends Invite (SDP) signaling to the MRS.

Step 524, MRS feedback 183 (SDP) signaling to Conf AS;

Step 525: The Conf AS sends Prack (SDP) /200Prack signaling to the MRS.

Step 526, the Conf AS sends the Prack (SDP) /200Prack signaling to the binding terminal C; Step 527, the Conf AS sends the Update (SDP) signaling to the binding terminal C;

Step 528, binding terminal C feedback Update (SDP) signaling to Conf AS;

Step 529: The Conf AS sends an Update (SDP) signaling to the MRS.

Step 530, the Conf AS sends 200 Update (SDP) signaling to the binding terminal C;

Step 531, MRS feedback 200Invite/ACK to Conf AS;

Step 532, the binding terminal C sends 180Ring/Prack/200Prack signaling to the Conf AS; Step 533, the Conf AS sends the off-hook Message Call In (Rear) / 200 OK signaling to the SIP terminal B;

Step 534, binding terminal C feedback 200Invite/ACK signaling to Conf AS;

At this point, a binding media channel is established between the terminal C and the MRS;

Step 535, the Conf AS sends a status notification Message Status Notify/200 OK signaling to the SIP terminal B;

Step 536: The SIP terminal B sends the Subscribe/200 Subscribe signaling to the Conf AS. Step 537: The Conf AS sends the Notify/200 Notify signaling to the SIP terminal B.

Steps 501 to 516 are processes for creating a multimedia conference, and steps 517 to 537 are procedures for inviting members to join.

In the embodiment of the present invention, the multimedia conference is successfully established, and the SIP terminal A is used as the conference control terminal. When the SIP terminal B participates in the multimedia conference, the conference control process is as shown in FIG. 6, which includes: Step 601: The SIP terminal A passes the HTTP The signaling initiates a conference control command to the Conf AS.

Step 602: The Conf AS transmits the result of the control via HTTP to the SIP terminal A as the conference control terminal. Step 603: The Conf AS notifies the conference control result to the SIP terminal B that subscribes to the site information by using the conference control notification signaling Notify.

Step 604: Perform real-time transmission of media streams (such as Real-Time Protocol Real-Time Control Protocol (RTT)) between the MRS and the conference control terminal.

Step 605: The media stream is transmitted in real time between the MRS and the binding terminal C.

In step 601, the control commands include: adding/deleting members, increasing the duration of the meeting, mute/unmute the site, and the like. The SIP terminal A uses the HTTP signaling to send a conference control command to the Conf AS instead of using the SIP signaling to initiate a conference control command. In the prior art, since the SIP signaling is limited to UDP, the transportable packet length cannot exceed 1300 bytes. When the negotiated media packet length exceeds 1300 bytes, the media signaling packet is truncated. In turn, the conference control command of the multimedia conference cannot be successfully initiated, and the multimedia conference function cannot be used by the user. In the embodiment of the present invention, the SIP terminal A uses the HTTP signaling to initiate a conference control command to the Conf AS. The HTTP is not restricted to UDP, and there is no limitation that the media packet length cannot exceed 1300 bytes, thereby avoiding media signaling. The phenomenon that the package is truncated makes the multimedia conference function more stable.

Based on the same inventive concept, the embodiment of the present invention further provides a conference application server Conf AS. The specific composition is as shown in FIG. 7, and includes a receiving unit 701, a sending unit 702, a notification unit 703, and a subscribing unit 704, where:

The receiving unit 701 is configured to receive, by the first SIP terminal, information that invites the second SIP terminal to participate in the multimedia conference, where the multimedia conference is created by the first SIP terminal;

The sending unit 702 is configured to send the invitation information to the second SIP terminal, and call the binding terminal of the second SIP terminal;

The notification unit 703 is configured to: after the binding terminal that receives the next call and the media resource server MRS establish a media channel, notify the second SIP terminal of the call state of the binding terminal;

The subscribing unit 704 is configured to receive, after the second SIP terminal receives the call state of the binding terminal, The second SIP terminal subscribes to the conference information of the conference site of the multimedia conference, and sends the conference site information of the multimedia conference to the second SIP terminal.

In one embodiment, as shown in FIG. 8, the receiving unit 701 can include a receiving subunit 801 and an acknowledgment subunit 802, where:

The receiving subunit 801 is configured to receive signaling for creating a multimedia conference initiated by the first SIP terminal, and send the media resource information of the first SIP terminal to the MRS, and send the media resource information of the MRS to the first SIP terminal.

The confirmation sub-unit 802 is configured to: when receiving the confirmation information of the media resource information of the first SIP terminal and the MRS to the other party, confirm that the media channel is established between the first SIP terminal and the MRS, and the multimedia conference is successfully created.

In an embodiment, the receiving subunit 801 is specifically configured to: receive signaling for creating a multimedia conference initiated by the first SIP terminal by using a hypertext transfer protocol HTTP.

In an embodiment, the notification unit 703 is specifically configured to: receive 183 (Session Description Protocol SDP) signaling sent by the binding terminal, obtain media information of the binding terminal, and bind the terminal by inviting Invite (SDP) signaling. Media information is sent to the MRS;

Receiving 200Invite signaling sent after the binding terminal goes off-hook;

The ACK signaling is fed back to the binding terminal, and it is determined that a media channel is established between the binding terminal and the MRS. Based on the same inventive concept, the embodiment of the present invention further provides a system for a session initiation protocol SIP terminal to participate in a multimedia conference. The specific composition is as shown in FIG. 9, including the first SIP terminal. 901. A conference application server (Conf AS) 902, a second SIP terminal 903, a media resource server MRS 904, and a binding terminal 905, where:

The first SIP terminal 901 is configured to invite the second SIP terminal 903 to participate in the multimedia conference by using the Conf AS 902, where the multimedia conference is created by the first SIP terminal 901;

The conference application server 902 is configured to send the conference invitation to the second SIP terminal 903, and to call the binding terminal 905 of the second SIP terminal; and notify the second SIP terminal 903 of the call state of the binding terminal 905;

The second SIP terminal 903 is configured to receive a conference invitation, subscribe to and receive the conference site information of the multimedia conference, and participate in the multimedia conference;

The MRS 904 is configured to establish a media channel through the conference application server 902 and the binding terminal 905. The binding terminal 905 is configured to receive the next call of the conference application server 902, and establish a media channel by using the conference application server 902 and the MRS 904.

In an embodiment, as shown in FIG. 9, the first SIP terminal 901 is specifically configured to: exchange the respective media resource information with the MRS 904 via the conference application server 902; when the first SIP terminal 901 and the MRS 904 respectively confirm the other party's During the media resource information, a media channel is established between the first SIP terminal 901 and the MRS 904, and the multimedia conference is successfully created.

In an embodiment, the first SIP terminal 901 is specifically configured to: initiate signaling for creating a multimedia conference by using a hypertext transfer protocol HTTP.

In one embodiment, the signaling used to create the multimedia conference used by the first SIP terminal 901 includes a set of any one or more of the following: a conference type, a conference topic, a conference creator, a conference duration, and a conference number;

The media resource information exchanged by the first SIP terminal 901 and the MRS 904 includes a set of any one or more of the following: a media port, a media IP address, and a resource reservation.

In an embodiment, the binding terminal 905 is specifically configured to: receive the next call of the conference application server 902, and send its own media information to the conference by using 183 (Session Description Protocol SDP) signaling. The application server 902; and, by means of the 180 ringing Ring signaling, sends ringing signaling and sends it to the Conf AS 902; and, after off-hook, sends 200Invite signaling to the conference application server 902; the conference application server 902 is specifically configured to: Initiating a call to the binding terminal 905, and transmitting the media information of the binding terminal 905 to the MRS 904 by inviting Invite (SDP) signaling; and media information of the MRS 904 and the media of the binding terminal 905 by using Prack signaling The information is pre-confirmed; and the ringing signaling is pre-confirmed by the Prack signaling, and the ringing state of the binding terminal 905 is notified to the second SIP terminal 903; and the ACK signaling is fed back to the binding terminal 905;

The MRS 904 is specifically configured to: send its own media information to the conference application server 902 through 183 (SDP) signaling; and, the conference application server 902 confirms the signaling link negotiation result by using 200 Invite/ACK ACK signaling.

In the embodiment of the present invention, the information sent by the first SIP terminal to invite the second SIP terminal to participate in the multimedia conference is received, where the multimedia conference is created by the first SIP terminal; the invitation information is sent to the second SIP terminal, and the call is sent. Binding terminal of the SIP terminal; after the binding terminal receiving the next call establishes a media channel with the media resource server MRS, notifying the second SIP terminal of the call state of the binding terminal; receiving the call of the binding terminal at the second SIP terminal After the status, the second SIP terminal receives the subscription signaling of the conference site information of the multimedia conference, and sends the conference site information of the multimedia conference to the second SIP terminal. In the embodiment of the present invention, for the second SIP terminal and its bound terminal, only one set of SIP signaling is required, and two sets of SIP signaling are not required to respectively call the second SIP terminal and its bound terminal, for the IMS. For the network elements involved in the network, the processing flow is simplified, the process takes time, and resources are saved. Moreover, the network elements involved in the IMS network do not need to be correspondingly adjusted corresponding to the two sets of SIP signaling, and can also save a lot of resources.

Further, the first SIP terminal initiates signaling and conference control request for creating a multimedia conference by using HTTP, and the HTTP is not limited to UDP, so there is no limitation that the length of the media packet cannot exceed 1300 bytes, and the media signaling packet is avoided. The truncation phenomenon makes the multimedia conference function more stable. The spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and the modifications of the invention

Claims

Claim

A method for a session initiation protocol for a SIP terminal to participate in a multimedia conference, comprising:

Receiving, by the first SIP terminal, information for inviting the second SIP terminal to participate in the multimedia conference, where the multimedia conference is created by the first SIP terminal;

The method of claim 1, wherein the multimedia conference is created by the first SIP terminal, and specifically includes:

The method of claim 2, wherein the receiving, by the first SIP terminal, the signaling for creating a multimedia conference comprises:

And receiving signaling for creating a multimedia conference initiated by the first SIP terminal by using a hypertext transfer protocol HTTP.

4. The method according to claim 2 or 3, wherein the signaling for creating a multimedia conference comprises a set of any one or more of the following: a conference type, a conference topic, a conference creator, a conference duration, a conference Number of people; The media resource information includes a set of any one or more of the following: media port, media

IP address, resource reservation.

The method of claim 1 or 2, wherein the binding terminal establishes a media channel with the media resource server MRS, specifically:

Receiving 200Invite signaling sent after the binding terminal goes off-hook;

The ACK signaling is fed back to the binding terminal, and a media channel is established between the binding terminal and the MRS.

A conference application server Conf AS, comprising: a receiving unit, a sending unit, a notifying unit, and a subscribing unit, wherein:

The conference application server according to claim 6, wherein the sending unit comprises a receiving subunit and an confirming subunit, wherein:

The confirmation subunit is configured to: when receiving the confirmation information of the first SIP terminal and the MRS to the media resource information of the other party, confirm that the media channel is established between the first SIP terminal and the MRS, and the multimedia conference is successfully created.

The conference application server according to claim 7, wherein the receiving sub-unit is specifically configured to: receive signaling for creating a multimedia conference initiated by the first SIP terminal by using a hypertext transfer protocol HTTP.

The conference application server according to claim 6 or 7, wherein the notification unit is specifically configured to:

Receiving 200Invite signaling sent after the binding terminal goes off-hook;

A system for a session initiation protocol SIP terminal to participate in a multimedia conference, comprising: a first SIP terminal, a conference application server Conf AS, a second SIP terminal, and a media resource service Server MRS and binding terminal, where:

The binding terminal is configured to receive a call of the conference application server, and establish a media channel by using the conference application server and the MRS.

The system of claim 10, wherein the first SIP terminal is specifically configured to: exchange the respective media resource information with the MRS via the conference application server; and confirm the media resource information of the other party by the first SIP terminal and the MRS respectively The media channel is established between the first SIP terminal and the MRS, and the multimedia conference is successfully created.

The system of claim 11, wherein the first SIP terminal is specifically configured to: initiate signaling for creating a multimedia conference by using a hypertext transfer protocol HTTP.

The system according to claim 10 or 11, wherein the binding terminal is specifically configured to: receive a next call of the conference application server, and send its own media information to the conference application server by using 183 signaling; Sending ringing signaling through 180 ringing Ring signaling and sending it to the conference application server; and, after off-hook, sending 200Invite signaling to the conference application server;

The conference application server is specifically configured to: initiate a call to the binding terminal, and send the media information of the bound terminal to the MRS by inviting the Invite signaling; and use the Prack signaling to media information of the MRS and the binding terminal. Pre-confirming the media information; and pre-confirming the ringing signaling by using the Prack signaling, and notifying the second SIP terminal of the ringing state of the binding terminal; And feeding back ACK signaling to the binding terminal;