WO2011140744A1 - Multimedia conference system in next generation network and realization method thereof - Google Patents

Abstract

The present invention provides a multimedia conference system in the Next Generation Network (NGN) and a realization method thereof, wherein the system includes a conference control terminal, a multimedia conference application server, a soft switch and a binding terminal. The conference control terminal is configured to initiate a signal for creating a multimedia conference and transmit an HTTP signal carrying conference information to the multimedia conference application server. The multimedia conference application server is configured to initiate an invite message for creating the multimedia conference to the soft switch after receiving the HTTP signal carrying the conference information, and inform the conference control terminal of the conference creation result with an HTTP message when a communication link negotiation is successful. The soft switch is configured to initiate an invite message to down-call the binding terminal bound by the conference control terminal, perform the communication link negotiation with the binding terminal, and synchronize the state of the communication link negotiation with the binding terminal to the multimedia conference application server. With the present invention, a Session Initiation Protocol (SIP) terminal is enabled to bind another terminal and to create a multimedia conference.

Description

 Multimedia conference system and implementation method in next generation network

Technical field

 The present invention relates to the field of multimedia conference technologies, and in particular, to a multimedia conference system and implementation method in a Next Generation Network (NGN).

Background technique

 In NGN, the multimedia conference function is provided to the user as a color enhancement function; NGN SIP) signaling enables the SIP terminal to use the multimedia conference function; in the existing NGN, some network elements (such as Soft Switch (SS)) The number of packets that can be transmitted by the User Datagram Protocol (UDP) protocol cannot exceed 1300 bytes. When the length of the negotiated media packet exceeds 1300 bytes, the media signaling packet is truncated. The multimedia conference function cannot be used; in particular, the function of using the multimedia conference to support the SIP terminal to bind the fixed line requires two sets of SIP signaling to respectively call the SIP terminal and the binding terminal. In this mode, all the involved network elements need to be done. Large adjustments, large amount of engineering transformation, and this mode is not applicable to IP Multimedia Subsystem (IMS) networks.

Summary of the invention

 The present invention provides a multimedia conference system in an NGN, which can implement a SIP terminal to bind other terminals (fixed line, mobile phone, etc.) and create a multimedia conference.

 The present invention also provides a method for implementing a multimedia conference in an NGN, which can enable a SIP terminal to bind other terminals (fixed line, mobile phone, etc.) and create a multimedia conference.

 The multimedia conference system in the NGN of the present invention includes a conference control terminal, a multimedia conference application server, a softswitch, and a binding terminal, where

The conference control terminal is configured to initiate signaling for creating a multimedia conference, and send the HTTP signaling carrying the conference information to the multimedia conference application server; The multimedia conference application server is configured to: after receiving the HTTP signaling carrying the conference information sent by the conference control terminal, initiate an invitation to create an invitation session of the multimedia conference to the softswitch; and pass the HTTP message after the negotiation of the call link is successful. Return the conference creation result to the conference control terminal;

 The softswitch is configured to: initiate an invite message to the bound terminal bound to the conference control terminal, perform a call link negotiation with the binding terminal, and synchronize the state of the call link negotiation with the binding terminal to The multimedia conference application server.

 In the multimedia conference system of the present invention, the conference control terminal may be further configured to: after receiving the conference creation result returned by the multimedia conference application server, send the subscription conference information to the multimedia conference application server; the multimedia conference application server may also be set to the conference control The terminal sends a notification meeting information. Notifications Conference information can include conference topics, conference participants, duration, number of members, and site control properties.

 The conference control terminal may also be configured to initiate a conference control command to the multimedia conference application server by using HTTP signaling; where the conference control command includes adding or deleting a member, increasing the conference duration, and the conference is muted or unmuted; the multimedia conference application server may also be configured to The control result is transmitted to the conference control terminal.

 The softswitch can be configured to exchange the media resource information with the SIP and SDP signaling to negotiate the call link with the binding terminal.

 The implementation method of the multimedia conference in the NGN of the present invention includes the following steps:

 A: The conference control terminal initiates the signaling for creating the multimedia conference, and sends the HTTP signaling carrying the conference information to the multimedia conference application server;

 B: The multimedia conference application server initiates an invitation to create a multimedia conference to invite messages to soft handover;

 C: the softswitch initiates the binding message, and the binding terminal bound to the conference control terminal, performs a call link negotiation with the binding terminal, and synchronizes the state of the call link negotiation to the multimedia conference application server;

D: The multimedia conference application server returns the conference creation result to the conference control terminal through an HTTP message after the negotiation of the call link is successful.

 The method of the present invention may further comprise the following steps after step D:

After receiving the conference creation result returned by the multimedia conference application server, the conference control terminal sends the subscription conference information to the multimedia conference application server; the multimedia conference application server sends the notification conference information to the conference control terminal. Notification meeting information may include meeting topics, meeting personnel, duration, number of members And the venue control properties.

 The method of the present invention may further comprise the following steps:

 The conference control terminal initiates a conference control command to the multimedia conference application server by using the HTTP signaling; the conference control command may include adding or deleting a member, increasing the conference duration, and the conference is muted or unmuted; the multimedia conference application server transmits the conference control result. To the conference control terminal.

 In step C, the softswitch can negotiate the call link through the SIP and SDP signaling interaction media resource information with the binding terminal.

 The invention has the beneficial effects that the multimedia conference system and the implementation method in the NGN according to the present invention can enable the SIP terminal to bind other terminals (fixed line, mobile phone, etc.) and create a multimedia conference, and the invention supports the IMS to the IP multimedia system. The network is seamlessly upgraded.

BRIEF abstract

 1 is a schematic structural diagram of a multimedia conference system in an NGN according to the present invention;

 2 is a flowchart of creating a multimedia conference signaling according to the present invention;

 FIG. 3 is a flowchart of multimedia conference conference control and media signaling according to the present invention.

Preferred embodiment of the invention

 Hereinafter, a multimedia conference system and an implementation method in the NGN of the present invention will be described in detail with reference to Figs.

 As shown in FIG. 1, the multimedia conference system in the NGN of the present invention includes a conference control terminal, a multimedia conference application server ConfAS, a softswitch, and a binding terminal.

 The conference control terminal is configured to initiate signaling for creating a multimedia conference, and send the HTTP signaling carrying the conference information to the Conf AS, where the HTTP signaling includes information of the multimedia conference, including a conference type (such as audio or video). , conference theme, conference creator, conference duration, conference number, member list, etc. Among them, the conference control terminal can be multiple.

The Conf AS is configured to: after receiving the HTTP signaling carrying the conference information sent by the conference control terminal, initiate an invitation (invite) message to create a multimedia conference to the softswitch; and negotiate successfully on the call link. The conference creation result is returned to the conference control terminal through an HTTP message.

 The softswitch is set to: initiate the invite message to the terminal bound to the conference control terminal, and bind the terminal to the media conference application server. Moreover, the softswitch exchanges media resource information through SIP and SDP signaling to negotiate a call link with the binding terminal. The Session Description Protocol (SDP) carried in the invite message contains the softswitch's media resource information (such as IP address and port, media capability, and resource reservation status, etc.).

 The binding terminal is configured to exchange media resource information with the softswitch for negotiation of the voice link through SIP and SDP signaling.

 Among them, the conference control terminal needs to have HTTP and SIP protocol stacks; the conference application server ConfAS needs to have HTTP and SIP protocol stacks, and has HTTP and SIP protocol conversion modules.

 In addition, the conference control terminal is further configured to: after receiving the conference creation result returned by the multimedia conference application server, send the subscription conference information to the multimedia conference application server; the multimedia conference application server is further configured to send the notification conference information to the conference control terminal.

 The notification meeting information includes the conference topic, the conference personnel, the duration, the number of members, and the site control attribute.

 In addition, the conference control terminal is further configured to initiate a conference control command to the multimedia conference application server by using HTTP signaling; the multimedia conference application server is further configured to transmit the control result to the conference control terminal. Among them, the control commands include adding or deleting members, increasing the duration of the meeting, muting the meeting, or unmuting.

 In addition, ConfAS is the core control device for multimedia conferences. It is divided into three modules: site control, media control, and user control. It is responsible for maintaining the signaling relationship between each participant in the conference, ensuring each participant. Both can receive media streams, execute meeting policies, and get status events that notify the meeting. The softswitch is the core calling device and is responsible for initiating and/or releasing the call conference into the shell.

 The multimedia conference application server includes a management module for managing the conference members and managing the conference information.

 The method for implementing the multimedia conference in the NGN of the present invention comprises the following steps:

Step 100: The conference control terminal initiates signaling for creating a multimedia conference, and sends the conference information. HTTP signaling to the multimedia conferencing application server;

 Step 200: The multimedia conference application server initiates an invitation to create a multimedia conference invite message to softswitch;

 Step 300: The softswitch initiates an invite message to call the bound terminal bound by the conference control terminal, and performs a call link negotiation with the binding terminal; and synchronizes the state of the call link negotiation to the multimedia conference application server; wherein, the softswitch The media resource information is exchanged through SIP and SDP signaling, and the call link negotiation is performed with the binding terminal.

 Step 400: The multimedia conference application server notifies the conference creation result to the conference control terminal through the HTTP message after the negotiation of the call link is successful.

 Wherein, after step 400, the following steps are further included:

 After receiving the conference creation result returned by the multimedia conference application server, the conference control terminal sends the subscription conference information to the multimedia conference application server;

 The multimedia conference application server sends the notification conference information to the conference control terminal.

 The conference information is notified, including the conference theme, conference personnel, duration, number of members, and site control attributes.

 Additionally, the method of the present invention may further comprise the following steps:

 The conference control terminal initiates a conference control command to the multimedia conference application server by using HTTP signaling, where the conference control command includes adding or deleting a member, increasing a conference duration, muting the conference, or canceling the silence;

 The multimedia conference application server transmits the conference control result to the conference control terminal.

 As shown in FIG. 2, a flowchart of a method for implementing a multimedia conference in an NGN according to an embodiment of the present invention includes the following steps:

 Step 201: The conference control terminal initiates signaling for creating a multimedia conference. The conference control terminal sends the http signaling carrying the conference information to the Conf AS, where the conference information includes the conference type (audio or video), the conference topic, and the conference creation. , meeting duration, number of meetings, list of members, etc.

Step 202: The Conf AS initiates an invite to create a multimedia conference to the softswitch. Step 203: The softswitch initiates an inbound call to the terminal bound to the conference control terminal, where the SDP carried in the invite contains the softswitch media resource information (IP address and port, media capability, resource reservation state, etc.).

 Steps 204 to 215: The softswitch and the bonded terminal exchange media resource information through SIP and SDP signaling, and the two-party call link negotiation succeeds. The signaling involved includes: 180 Ring, PRACK/200PRACK, Invite200OK ( sd ), ACK.

 After the call link negotiation is established, the softswitch simultaneously synchronizes the state negotiated with the bonded terminal call link to the Conf AS.

 In addition, the conference server Conf AS updates the multimedia conference status to create successfully.

 Step 216: The Conf AS notifies the conference control result of the conference creation result by using an HTTP message. Steps 217-218: The conference control terminal sends a Subscribe subscription conference information to the Conf AS.

 Steps 219-220: The Conf AS sends a notify notification to the conference terminal (meeting subject, chairperson, duration, number of members, site control attributes, etc.).

 Step 221: The Conf AS invites other members to join the conference site through the signaling message. The detailed description of the present invention is not made here.

 FIG. 3 is a flowchart of a conference control process and a media signaling process after the multimedia conference of the present invention is successfully established, as shown in FIG. 3, including the following steps:

 Step 301: The conference control terminal initiates a conference control command (adding or deleting a member, increasing a conference duration, muting or unmute the conference, etc.) to the Conf AS through HTTP signaling.

 Step 302: The Conf AS transmits the conference control result to the conference control terminal.

 Step 303: During the multimedia conference between the binding terminal and the softswitch, the session media stream channel is always kept alive.

 In summary, the multimedia conference system and the implementation method in the NGN according to the present invention can effectively solve the situation in which the SIP terminal binds other terminals (fixed calls, mobile phones, etc.) to create a multimedia conference, and only one set of call binding is needed. Fixed-line SIP signaling. The present invention has good interoperability and scalability, and the present invention supports seamless upgrade to IP multimedia system IMS networks.

The above is a detailed description of the present invention for those skilled in the art to understand the present invention. It is to be understood that various changes and modifications may be made without departing from the scope of the invention.

Industrial applicability

 Compared with the prior art, the present invention enables SIP terminals to bind other terminals (fixed calls, mobile phones, etc.) and create multimedia conferences, and the present invention supports seamless upgrade to IP multimedia system IMS networks.

Claims

Claim  1. A next-generation network multimedia conferencing system in an NGN, including a conference control terminal, a multimedia conference application server, a softswitch, and a binding terminal, where  The conference control terminal is configured to initiate signaling for creating a multimedia conference, and send the HTTP signaling carrying the conference information to the multimedia conference application server;  The multimedia conference application server is configured to: after receiving the HTTP signaling carrying the conference information sent by the conference control terminal, initiate an invitation to create an invitation session of the multimedia conference to the softswitch; and pass the HTTP message after the negotiation of the call link is successful. Return the conference creation result to the conference control terminal;  The softswitch is configured to: initiate an invite message to the bound terminal bound to the conference control terminal, perform a call link negotiation with the binding terminal, and synchronize the state of the call link negotiation with the binding terminal to The multimedia conference application server.  2. The multimedia conference system in the NGN according to claim 1, wherein  The conference control terminal is further configured to: after receiving the conference creation result returned by the multimedia conference application server, send the subscription conference information to the multimedia conference application server;  The multimedia conference application server is further configured to send a notification conference information to the conference control terminal.  The multimedia conference system in the NGN according to claim 2, wherein the notification conference information includes a conference topic, a conference personnel, a duration, a number of members, and a site control attribute.  4. The multimedia conference system in the NGN according to claim 2, wherein  The conference control terminal is further configured to send a conference control command to the multimedia conference application server by using HTTP signaling; where the conference control command includes adding or deleting a member, increasing a conference duration, negotiating a conference, or canceling a silence;  The multimedia conference application server is further configured to transmit the control result to the conference control terminal.  The multimedia conference system in the NGN according to any one of claims 1 to 4, wherein the softswitch is configured to interact with the media resource information through the session initiation protocol SIP and the session description protocol SDP signaling. Bind the terminal to negotiate the call link. 6. A method for implementing a multimedia conference in a next generation network NGN, comprising the following steps: A: The conference control terminal initiates the signaling for creating the multimedia conference, and sends the HTTP signaling carrying the conference information to the multimedia conference application server;  B: The multimedia conference application server initiates an invitation to create a multimedia conference to invite messages to soft handover;  C: the softswitch initiates the inbound message to the binding terminal bound to the conference control terminal, performs a call link negotiation with the binding terminal, and synchronizes the state of the call link negotiation to the multimedia conference application server;  D: The multimedia conference application server returns the conference creation result to the conference control terminal through an HTTP message after the negotiation of the call link is successful.  7. The method for implementing a multimedia conference in an NGN according to claim 6, further comprising the following steps after the step D:  After receiving the conference creation result returned by the multimedia conference application server, the conference control terminal sends the subscription conference information to the multimedia conference application server;  The multimedia conference application server sends a notification conference information to the conference control terminal.  8. The method for implementing a multimedia conference in an NGN according to claim 7, wherein the notification conference information includes a conference topic, a conference personnel, a duration, a number of members, and a site control attribute.  9. The method for implementing a multimedia conference in an NGN according to claim 7, further comprising the steps of:  The conference control terminal initiates a conference control command to the multimedia conference application server by using HTTP signaling; the conference control command includes adding or deleting a member, increasing a conference duration, and the conference is muted or unmuted; the multimedia conference application server transmits the control result to the The conference control terminal.  The method for implementing a multimedia conference in an NGN according to any one of claims 6 to 9, wherein in the step C, the softswitch is an interactive medium through a session initiation protocol SIP and a session description protocol SDP signaling. The resource information is negotiated with the binding terminal for a call link.