WO2009056031A1 - Procédé et dispositif de commande de conférence multimédia - Google Patents

Procédé et dispositif de commande de conférence multimédia Download PDF

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Publication number
WO2009056031A1
WO2009056031A1 PCT/CN2008/072762 CN2008072762W WO2009056031A1 WO 2009056031 A1 WO2009056031 A1 WO 2009056031A1 CN 2008072762 W CN2008072762 W CN 2008072762W WO 2009056031 A1 WO2009056031 A1 WO 2009056031A1
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WIPO (PCT)
Prior art keywords
conference
media
control
resource
indication
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PCT/CN2008/072762
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English (en)
Chinese (zh)
Inventor
Kai Wen
Cuiting Yang
Original Assignee
Huawei Technologies Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2009056031A1 publication Critical patent/WO2009056031A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/40—Support for services or applications
    • H04L65/403—Arrangements for multi-party communication, e.g. for conferences
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/16—Arrangements for providing special services to substations
    • H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
    • H04L12/1813—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast for computer conferences, e.g. chat rooms
    • H04L12/1822—Conducting the conference, e.g. admission, detection, selection or grouping of participants, correlating users to one or more conference sessions, prioritising transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/1066—Session management
    • H04L65/1101—Session protocols
    • H04L65/1104—Session initiation protocol [SIP]

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for controlling a multimedia conference. Background technique
  • Next-generation networks based on the IP Multimedia Subsystem allow users to organize multimedia conferences such as audio conferencing, video conferencing, and data conferencing.
  • the multimedia conference is usually implemented by a network-side service control entity such as an application server (AS, Application Server) or a Call Session Control Function (CSCF) entity, and indicates a multimedia resource function (MRF, by control signaling).
  • AMF Application Server
  • CSCF Call Session Control Function
  • MRF multimedia resource function
  • Multimedia Resource Function The entity performs conference control logic, such as creating a conference, controlling the conference participant to join or leave the conference, inserting media information for a conference participant, inserting media information for the entire conference, and authenticating conference control rights, etc.
  • Conference services such as media mixing, transcoding, and party participation in meeting notifications.
  • the service control entity, the MRF, and the storage attribute storage server can be regarded as a conference server.
  • the conference server serves as a central control point of the multimedia conference, and establishes a relatively stable letter with each participant of the multimedia conference. To provide a conference service for multimedia conferences with media channels.
  • the Mr interface between the MRF and the service control entity may use the Internet Engineering Task Force (IETF) to give a draft of the Mr interface.
  • IETF Internet Engineering Task Force
  • the so-called Mr interface can be the communication protocol between the service control entity and the MRF.
  • FIG. 1 is a flow chart of a conventional multimedia conference insertion media stream.
  • user equipment A is the multimedia conference host
  • user equipment B is the conference participant who has joined the multimedia conference. The steps included in the process are briefly described as follows:
  • step 101 to step 102 the user equipment A serves as the conference host, and hopes to insert the media stream provided by the network side content server in the entire multimedia conference, and send the conference uniform resource identifier (Confrence URI) to the service control entity of the conference server through the core network. And a Refer message for the media information that you want to insert.
  • the media information may include media location information, as well as media description information such as a media codec format.
  • Steps 103 to 104 After receiving the Refer message of the user equipment A, the service control entity sends an Invite message carrying the media information to the content server that provides the streaming media through the Invite mode indicated by the Refer message; the content server receives the After the Invite message, and find the corresponding media stream, return a 200 OK response to the service control entity.
  • Steps 105 to 108 After receiving the 200 OK response returned by the content server, the service control entity sends an Invite message carrying the conference URI and the media description information to the multimedia resource function entity MRF. After receiving the Invite message, the MRF controls the service. The entity returns a 200 OK response. After receiving the 200 OK response returned by the MRF, the service control entity returns an ACK message to the content server and the MRF respectively.
  • Steps 109 to 111 The service control entity sends the conference policy, such as the specified media location information, to the MRF through the Info message body. After receiving the Info message, the MRF returns a 200 OK response to the service control entity, and the multimedia resource function entity MRF The media stream specified in the media description information is requested from the content server, and after the content server accepts the request, the media stream from the content server is received.
  • the conference policy such as the specified media location information
  • Step 112 The MRF separately transmits the media stream to each conference participant of the multimedia conference, such as user equipment A and user equipment B.
  • the above conference strategy is a conference attribute control, conference permission control, and the like used by the conference server in performing multimedia conference management, such as the use of the media mixing resources in a multimedia conference.
  • the media playing resource may be a multimedia conference mixer, a multi-picture decoder, or the like.
  • the service control entity can describe the conference attribute corresponding to the conference policy by using an XML interface between the service control entity and the MRF, such as the Media Service Markup Language (MSML).
  • MSML Media Service Markup Language
  • the MRF interface between the service control entity and the MRF is used to notify the MRF of the conference attribute, and the MRF provides the related conference service according to the conference attribute.
  • Conference properties typically govern the rules for the use of media playback resources, such as for mixer media resources.
  • the usage rule is usually that the N conference participants who allow the loudest voices preferentially occupy the media playing resource, and the N value can be configured as needed.
  • the usage rule may be carried by the service control entity to the MRF through the message body of the SIP signaling, and the message body may further describe information about the mixer, such as a mixer identifier.
  • the usage rule of the window corresponding to the display area is usually MV (Voice Activated Switching), and the M conference participants with the loudest voice can be respectively displayed in the M display areas.
  • the screen, the M value can be configured as needed, and can be equal to N.
  • the usage rule may be carried by the service control entity to the MRF through the message body of the SIP signaling, and the identifier of each display area, the size and location of each display area, and the like may be further described in the message body.
  • the media resources are usually controlled according to the size of the voice of the conference participants.
  • the service control entity may carry the conference attribute through a SIP message body such as an Info message, and instruct the MRF to provide the conference service such as the insertion media stream and the conference notification for the entire conference or for a single conference participant.
  • a SIP message body such as an Info message
  • the MRF may provide the conference service such as the insertion media stream and the conference notification for the entire conference or for a single conference participant.
  • the existing Mr interface protocol such as the instruction sent by the service control entity to the MRF
  • only the rules for occupying the media playing resources of the conference participants are described in a general manner. Therefore, it is difficult to utilize the control of the MRF by the service control entity to further The MRF controls the use of media playback resources by each conference participant. If you do not want to hear the comments from user A corresponding to user equipment A, if the volume at user A is large enough, user A is enough to occupy the mixer.
  • the conference server it will be difficult to utilize the conference server to control the multimedia conference.
  • the media information provided by the network side that does not have the self-control capability such as the media stream provided by the network-side content server, cannot be controlled by the conference server to occupy the media playing resources of the media stream, and thus, Because it is difficult to effectively control the media stream to occupy the media playing resources, the playback of the media stream occupies the media playing resources needed to carry out the meeting, thereby affecting the development effect of the entire multimedia conference.
  • an embodiment of the present invention provides a method and apparatus for controlling a multimedia conference, which can control the use of media playing resources in a multimedia conference by a conference participant.
  • a method for controlling a multimedia conference including:
  • a SIP signaling control apparatus including:
  • a signaling generating unit configured to generate SIP signaling that carries an indication that is required to control the use of the media playing resource by the designated conference participant;
  • the signaling sending unit is configured to send the SIP signaling generated by the signaling generating unit to Business control entity.
  • a control device for a multimedia conference including:
  • an indication receiving unit configured to receive, by the service control entity, an indication sent by the SIP signaling to control the use of the media playing resource by the designated conference participant; and an execution unit, configured to control according to the indication received by the receiving unit The designated conference participant uses the media play resource.
  • the service control entity controls the usage rights of the conference participants to the media play resources in the multimedia conference by sending the SIP signaling carrying the indication that the designated conference participant is instructed to use the media play resources.
  • 1 is a flow chart of an existing multimedia conference insertion media stream
  • FIG. 2 is a flowchart of a method for controlling a multimedia conference in an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of a SIP signaling control apparatus according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a device for controlling a multimedia conference according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a multimedia resource function entity MRF according to an embodiment of the present invention
  • 6 is a control flowchart of a multimedia conference in Embodiment 1 of the present invention
  • FIG. 8 is a flowchart of deploying a conference policy through a BOSS interface according to an embodiment of the present invention.
  • FIG. 9 is a flowchart of deploying a conference policy through a POST interface according to an embodiment of the present invention.
  • the service control entity such as the AS or CSCF in the conference server, is difficult to control the situation in which the conference participants occupy the media play resources through the MRF, because the existing interface between the service control entity and the MRF is in the Mr interface protocol, although How to use the media playback resources to make specifications for the entire multimedia conference, for example, the message body through SIP signaling will allow the conference participants with the loudest voice to occupy the multimedia conference attribute description information of the mixer, and bring it to the MRF, and the MRF will use the conference attribute to the multimedia conference.
  • the corresponding management is performed, but because the existing Mr interface protocol does not specify how each conference participant specifically uses the media playing resources, it is difficult for the service control entity to use the MRF for each conference participant to use the media playing resources. Effective control.
  • the embodiment of the present invention provides a control scheme for a multimedia conference.
  • the service control entity instructs the MRF to control the use of the media playing resources in the conference by the designated conference participants in the multimedia conference.
  • the media information of the media stream that is to be inserted into the multimedia conference such as the media stream provided by the network side, may be used as a special conference participant, and the service control entity may provide a corresponding indication to indicate how to control the MRF.
  • FIG. 2 is a flowchart of a method for controlling a multimedia conference according to an embodiment of the present invention. The process includes the following steps:
  • Step 201 The multimedia resource function entity MRF receives the request from the service control entity to control the indication of the use of the media play resource by the conference participant, and the indication is carried by the SIP signaling sent by the service control entity.
  • the SIP signaling may be a SIP Invite message, an Info message, a Refer message, or the like.
  • the above indication can be carried by the message body of the SIP signaling.
  • the designated conference participant may be a user equipment, or may be some special conference participants, such as network media information provided by the network side.
  • Step 202 The multimedia resource function entity MRF controls, according to the received indication, the use of the media playing resource by the designated conference participant.
  • FIG. 3 is a schematic structural diagram of the device, which may be disposed on a service control entity, including:
  • the signaling generating unit 301 is configured to generate SIP signaling that carries an indication that it is required to control the use of the media playing resource by the designated conference participant;
  • the signaling sending unit 302 is configured to send the SIP signaling generated by the signaling generating unit 301 to the multimedia resource function entity MRF.
  • the embodiment of the invention further provides a control device for a multimedia conference.
  • Figure 4 is a schematic view of the structure of the control device.
  • the control device comprises:
  • the indication receiving unit 401 is configured to receive, by the service control entity, an indication sent by the SIP signaling to control an indication of the use of the media playing resource by the designated conference participant;
  • the executing unit 402 is configured to control, according to the indication received by the receiving unit 401, the use of the media playing resource by the designated conference participant.
  • the execution unit may include:
  • the resource allocating unit 4021 is configured to: according to the specified conference participant identifier in the indication received by the indication receiving unit 401, and a control instruction for forcibly occupying the media playing resource by the designated conference participant, a media play resource is allocated to the designated conference participant;
  • the resource release unit 4022 is configured to: according to the specified conference participant identifier in the indication received by the indication receiving unit 401, and to suppress the control instruction occupied by the designated conference participant to occupy the media playing resource, release the allocated Playing the resource to the media of the designated conference participant.
  • the control device of the multimedia conference may further include:
  • the response returning unit 403 is configured to, after the executing unit 402 controls the use of the media playing resource by the designated conference participant, return a response of the execution success to the service control entity according to the execution result; or return a response that fails to execute.
  • the control device of the multimedia conference described above may be disposed in the multimedia resource function entity MRF. If the MRF further needs to have a gateway function such as signaling conversion and media negotiation, as shown in FIG. 5, the MRF may further include:
  • the signaling conversion unit 510 can be configured to convert the received non-SIP signaling into SIP signaling, or convert the received SIP signaling into non-SIP signaling;
  • the media negotiation unit 520 is configured to perform media negotiation with the content server.
  • the signaling interaction between the conference server and the content server not supporting the SIP protocol can be implemented by the conversion of the signaling conversion unit, and the media resources on the content server not supporting the SIP protocol are introduced into the multimedia conference.
  • the media negotiation unit 520 the media stream on the content server can be converted into an SDP-based control information description format by the RTSP-based control information description format, and the media stream is introduced into the multimedia conference.
  • the foregoing indication may include: the specified conference participant identifier, and a control instruction that controls the use of the media play resource by the designated conference participant.
  • the control instruction may include: forcing the media conference resource to be occupied by a designated conference participant; and the MRF performing the indication may be: allocating the media play resource to the designated conference participant.
  • the control instruction may also include: refraining from occupying the media playing resource by the designated conference participant; and the MRF performing the indication may be: releasing the media playing resource allocated to the designated conference participant.
  • the control command may also be to force a certain media playing resource, such as a mixer, to be occupied by a designated conference participant, and to prevent other media playing resources, such as a multi-picture decoder, from being occupied by the designated conference participant.
  • the control command may also be: forcing the media playing resource to be occupied by a designated conference participant, and stopping the media playing resource from being occupied by other designated conference participants.
  • the embodiment of the present invention sends the related indication to the MRF by extending the Mr interface, that is, the language description of the extended media service markup language MSML.
  • the following extensions can be made: In the createconference, modifyconference, etc. elements, the 'enhanced action' (forceactive), the forceactive parameter can indicate the specified Participation in a meeting The party forces the use of the mixer.
  • Extend forceactive in the video rendering (videolayout) attribute of the createconference, modifyconference element can be used to specify that a conference participant uses a window provided by the multi-picture decoder to display its Picture.
  • the value of the method in the selector attribute can be forced (force), which means that the display content of a window screen is controlled by the business control entity.
  • the conference control party may be a host that has all control rights to the conference by default, or other participants of the conference that have certain control rights to the conference.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • the user equipment A and the user equipment B are user equipments in the IMS domain of the IP multimedia subsystem, and both of them have joined the multimedia conference, where the user equipment A is the conference host.
  • the user equipment A wants to insert the media stream provided by the network side content server in the conference.
  • the content server does not support SIP, or does not support the SDP in the SIP, but supports the RTSP. Therefore, in the first embodiment, the conference server and the content can be A gateway is added between the servers, and the gateway has the function of converting SIP signaling and non-SIP signaling, and also has the function of converting the media format of the media stream input therein.
  • the content server can support SIP, it is not necessary to add a gateway between the conference server and the content server.
  • FIG. 6 is a control flowchart of a multimedia conference in Embodiment 1 of the present invention.
  • the process can include the following steps:
  • Step 601 to step 604, the user equipment A wants to insert the control of the media stream provided by the network side content server in the conference, so the Refer message carrying the media information is sent to the service control entity of the conference server through the core network.
  • the message header field may carry the multimedia conference URI where the user equipment A is located, and the identifier used to identify the current service is the multimedia conference insertion media, and the method is to use the SIP invite.
  • the message body can carry media stream information, such as network location information of the media, media description information such as media codec format, and the like.
  • the MRF performs media negotiation and media channel establishment between the gateway and the content server, including negotiating the output end and the input end of the media stream, and the media stream encoding and decoding formats supported by the two parties.
  • the content server After receiving the non-SIP message requesting to transmit the media stream, the content server searches for the corresponding media according to the media description information carried in the non-SIP message, and returns a successful response to the gateway. After receiving the successful response returned by the content server, the gateway returns a 200 OK response to the service control entity, and the service control entity returns a 200 OK response to the user equipment A through the core network.
  • Step 609 to step 614 after the service control entity completes media negotiation with the content server, the service control entity sends an Invite message for notifying the MRF about the media information to the MRF. After receiving the Invite message, the MRF completes the media with the content server.
  • the service control entity respectively returns an ACK message to the gateway and the MRF; after receiving the ACK message, the gateway requests the relevant media stream from the content server, receives the media stream of the content server, and forwards the data stream to the MRF. .
  • Step 615 to step 616 after receiving the media stream, the MRF receives the Info message carrying the new conference attribute description information sent by the service control entity, and returns a 200 OK response to the service control entity after receiving the Info message;
  • the MRF controls the use of media playback resources by the conference participants according to the new conference attribute description information.
  • the media stream is regarded as a special conference participant, that is, a third conference participant.
  • conference policies may be redeployed.
  • the usage policy for the mixer may be occupied by the third conference participant who has the loudest voice; the usage policy for the display may be Allow the display of the loudest The screen of the three conference participants.
  • the newly deployed conference policy can be obtained from the above Info message body.
  • the conference attribute description information described by the MSML language is embodied.
  • Step 617 The MRF re-organizes the received media stream according to the newly deployed conference policy, and then transmits the media stream to the user equipment A and the user equipment B respectively.
  • the media information provided by the network side is successfully joined to the conference as a special conference participant.
  • the flow of the above steps 601 to 617 is basically similar to the process of inserting a media stream in a multimedia conference.
  • Step 618 to step 619 the user equipment A wants to control the occupation status of the media playing resources by the conference participants. Therefore, the control information is sent to the service control entity through the core network through the Invite or Info message.
  • Step 620 After receiving the Invite or Info message carrying the control information sent by the user equipment A, the service control entity parses the control information in the message, and describes the control information in the description language of the extended Mr interface in the embodiment of the present invention. After that, an indication of controlling the use of the media playing resource by the designated conference participant will be required to be carried to the MRF through the Info message body.
  • the signaling generating unit 301 in the service control entity may generate the Info message according to the foregoing control information.
  • the signaling generating unit 301 can also generate required SIP signaling according to the conference policy stored in the conference server.
  • the user equipment A wants to control the display of the video media stream on the display window of the multi-picture decoder. If a window in the multimedia conference is desired to display the corresponding video, it is required to control the designated conference participant.
  • An indication of the use of the media play resource may be to force a window to be occupied by the video media stream.
  • the MSML may be used to describe the indication.
  • the Info message body carries the conference attribute described by the MSML, and the described information may include: an identifier of the designated conference participant, allowing the designated conference to participate. The window identifier occupied by the party, etc. The designated conference participant identifier indicates the video media stream.
  • Step 621 to step 623 after receiving the Info message sent by the service control entity in step 620, the MRF parses the Info message, and obtains the requirement to control the designated conference participant to play the media resource.
  • the media play resource may be allocated to the content server according to the instruction, that is, after the media stream provided by the content server is occupied by the main window in the multimedia conference, the 200 OK response is returned to the service control entity; The entity returns to the user equipment A through the core network a 200 OK response indicating success.
  • the return of the 200 OK response is improved, that is, after the MRF execution indication is successful, the 200 OK response is returned to the service control entity; if the MRF fails to execute the indication, the response to the failed execution may be returned to the service control entity. .
  • the MOK can also return a 200 OK response immediately after receiving the Info message.
  • Step 624 to step 625 the MRF re-mediation between the gateway and the content server to modify the media channel. After the media re-negotiation succeeds, the media stream sent by the content server through the gateway is forwarded, and the media stream is forwarded to all conference participants. The process can be ended.
  • the MRF needs to re-negotiate the media negotiation with the content server because the content to be displayed in the main window of the multimedia conference changes, so the MRF needs to renegotiate the playback format of the media stream with the content server. Wait for the playback strategy to provide a better main window display for multimedia conferences.
  • the display area of the display on the multimedia conference may have three areas, the main window is forcibly displayed as the media stream provided by the content server, and the other two small windows are displayed.
  • the MSML description content of the extended SIP message body may be brought to the MRF by the service control entity, and the indication may be that the request control is specified.
  • the participant's indication of the use of the media playing resource, and correspondingly, the execution of the indication by the MRF can effectively control the use of the media playing resources in the multimedia conference by the conference participants in the multimedia conference, which is better for the conference host. It is convenient to control the development of multimedia conferences.
  • the service control entity may further analyze the control information according to the control information sent by the conference control party, such as the conference host or other participants of the conference, and use the control information to extend the description language of the Mr interface in the embodiment of the present invention. After being described, it is brought to the MRF through SIP signaling, indicating MRF controls the operation of multimedia conferences. In the embodiment of the present invention, the commonly used extensions are listed.
  • the user equipment A is forced to use the mixer, and the following information can be carried in the message body of the SIP signaling sent by the service control entity to the MRF:
  • the designated conference participant is identified as the user equipment A.
  • the identifier, the mixer is assigned to the indicated value used by the designated conference participant, such as "true,".
  • the message body can further carry other conference attributes, such as the number of conference participants allowed to occupy the mixer. No more than N, etc.
  • the user equipment B is forced to use the mixer, and the following information can be carried in the message body of the SIP signaling sent by the service control entity to the MRF:
  • the designated conference participant is identified as the identifier of user equipment B, and the mixer is assigned to the indication value used by the designated conference participant, such as "true".
  • the audio conference attribute may be modified as needed, and the user equipment B may be revoked from using the mixer, that is, the user equipment B is prevented from occupying the mixer, and may be sent to the message body of the SIP signaling sent by the service control entity to the MRF. And carrying the following information:
  • the designated conference participant is identified as the identifier of the user equipment B, and the designated conference participant is used to occupy the indicator value of the mixer, such as "false".
  • the following information may be carried in the message body of the SIP signaling sent by the service control entity to the MRF: the designated conference participant identifier
  • the mixer is assigned to the indicated value used by the designated conference participant, such as "true"; the primary window identifier is allowed to be occupied.
  • the main window provided by the multi-picture decoder is forcibly used by the media stream, and the following may be carried in the message body of the SIP signaling sent by the service control entity to the MRF.
  • Information The designated conference participant is identified as the identifier of the media stream, and the mixer is assigned to the indicated value used by the designated conference participant, such as "true"; the occupied main window identifier is allowed.
  • the video conference attribute is modified as required, and the media stream is disqualified from occupying the main window
  • the following information may be carried in the message body of the SIP signaling sent by the service control entity to the MRF:
  • the designated conference participant is identified as the media stream.
  • the identifier of the designated conference participant occupies the mixer, such as "false"; suppresses the main window identifier occupied by the designated conference participant.
  • the audio activation switching mode is still used, that is, the screen of some conference participants with the loudest voice is displayed. If multiple areas are allowed to display the screen, the content displayed in each area can be determined according to the displayed sound size of each conference participant; if a window is forcibly assigned to the designated conference participant, the window display is specified. After the screen of the conference participant, the subsequent forced display operation is allowed to be re-specified for the window; if the designated conference participant is prevented from occupying the window, the audio activation switching method is still used.
  • the existing MRF is used as a network element in the conference server, and can implement centralized control of the conference by the conference host based on the control information sent by the conference host.
  • the control device of the multimedia conference is set in the MRF, and the MRF implements centralized control of the conference by the conference host, including controlling the use of the media play resource by the designated conference participant.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • the user equipment A is a conference host, and may have all rights to the multimedia conference operation. In practical applications, other participants who can deploy the conference, such as User Equipment B, may have partial rights to the multimedia conference operation.
  • the user equipment B has the right to control the playing of the media stream, and the user equipment B has the function of supporting two sessions at the same time.
  • the MRF in the conference server is the existing MRF, and the MRF of the control device provided with the multimedia conference is set between the conference server and the content server. The main function of the setting is that the multimedia conference is set.
  • the MRF of the control device can control not only the conference host but also the use of media playing resources by the designated conference participants based on the control information sent by other participants of the conference.
  • the content server does not support SIP, but supports RTSP. Therefore, the media gateway function can be further added to the MRF of the control device provided with the multimedia conference. Moreover, for convenience of description, the MRF in which the media gateway function is added in the second embodiment and the control device provided with the multimedia conference is the media gateway, and the existing MRF in the conference server is still called the MRF.
  • the media gateway function may not be added to the MRF of the control device provided with the multimedia conference, or the media gateway function may not be added.
  • FIG. 7 is a control flowchart of a multimedia conference in Embodiment 2 of the present invention.
  • the process can include the following steps:
  • Step 701 The MRF provides a local media stream for all conference participants in the conference server, and user equipment A and user equipment B receive a one-way session from the MRF, that is, receive the local media stream.
  • Step 702 to step 705 the user equipment A desires to insert the media stream provided by the network side content server for the user equipment B, and sends a Refer message carrying the media description information to the service control entity of the conference server through the core network; the service control entity receives After the Refer message, a 200 OK response is returned to user equipment A through the core network.
  • Step 706 to step 709 the service control entity sends an Invite message carrying the media description information to the gateway, and the gateway converts the received Invite message into a non-SIP request message, and the media description information is carried to the content server by using the non-SIP request message;
  • the content server After receiving the non-SIP request message, the content server searches for the corresponding media, and finds a return success response to the media gateway; the media gateway returns a 200 OK response to the service control entity.
  • Step 710 to step 713 The service control entity sends an Invite message carrying the media description information to the user equipment B according to the negotiated media description information returned by the content server. After receiving the Invite message, the user equipment B controls the service. The entity returns a 200 OK response. After receiving the 200 OK response returned by the user equipment B, the service control entity returns an ACK message to the user equipment B and the media gateway respectively.
  • Step 714 After receiving the ACK message returned by the service control entity, the media gateway receives the media stream transmitted by the content server, and transmits the media stream to the media stream receiving end, that is, user equipment B.
  • the network media stream from the content server can be received while receiving the local media stream.
  • the foregoing steps 701 to 714 may be similar to the process of inserting a media stream by a conference participant in the multimedia conference based on the existing conference hosting direction.
  • Step 715 The user equipment B desires to suspend the playing of the network media stream, so the control information of the suspended playing is sent to the service control entity, and the control information may be brought to the service control entity by using the Re-Invite message, and the Re-Invite message is also carried. Network media description information.
  • Step 716 to step 721 After receiving the Re-Invite message sent by the user equipment B, the service control entity parses the control information in the message, and generates an Info carrying an instruction to control the use of the media playing resource by the designated conference participant.
  • the message may be that the network media information is used to stop the media playing resource on the media gateway, and the Info message is sent to the media gateway.
  • the media gateway After the media gateway parses the Info message, the media gateway sends a request to the content server to stop transmitting the media.
  • the non-SIP request message such as the RTSP, releases the media play resource allocated to the content server, and the non-SIP request message carries the media description information; after receiving the non-SIP request message, the content server modifies the provided media stream, and returns Successfully responding; after receiving the successful response returned by the content server, the media gateway returns a 200 OK response to the service control entity; after receiving the 200 OK response returned by the media gateway, the service control entity returns a 200 OK response to the user equipment; After the 200 OK response, to the business The control entity returns an ACK message.
  • Step 722 The media gateway receives the network media stream modified by the content server, and transmits the network media stream to the user equipment B, and the process may end.
  • the conference server can first withdraw the user equipment B from the multimedia conference according to the relevant conference policy, and then re-establish the session between the user equipment B and the content server. After that, the user equipment B can perform control operations on the received network media stream, and the media gateway helps to implement the operation.
  • the addition of the function of the media gateway can extend the achievable service in the multimedia conference, and cooperate with the conference server, in addition to inserting the media content requested by the conference host into the multimedia conference, and also to the multimedia
  • the conference participants in the conference delivered various documents, shared whiteboards, and used multimedia conferences to provide entertainment activities such as multi-person chorus karaoke.
  • the user equipment is the end of the IMS domain.
  • the interworking gateway can perform signaling conversion and media transmission between the user equipment and the core network, and the signaling conversion and The technology of media transmission is an existing technology that can be implemented, and will not be described.
  • FIG. 8 is a flow chart of deploying a conference policy through an interface of a business operation support system (BOSS) according to an embodiment of the present invention.
  • BOSS business operation support system
  • user A corresponding to user equipment A can modify the conference policy by accessing the relevant website provided by the conference server through the client.
  • the process can include the following steps:
  • Step 801 to step 806 User A accesses the conference policy page of the related website, and sends a conference policy query to the client self-service server based on the HTTP protocol. After receiving the query, the client self-service server converts the query into an MML format and sends the query to the conference. After receiving the query, the conference server returns the current conference policy in the MML format to the client self-service server, and the client self-service server converts the current conference policy in the MML format into the HTTP format and sends it to the user A.
  • the MML conversion process can be omitted.
  • the user A modifies the conference policy according to the needs of the conference, such as modifying the control authority of the conference participant to the multimedia conference, and sending the modified conference policy to the network side.
  • user A since user A describes the modified control authority based on the HTTP format on the client side, and the network side can usually recognize the control authority described in the MML format, it is usually between the client and the conference server on the network side.
  • the modified conference policy in MML format is sent to After the conference server receives the modified conference policy, the storage server stores the modified conference policy, and returns the modification result to the user A through the client self-service server.
  • Step 814 to step 815 after the conference server stores the modified conference policy, notifying the service control entity that the conference policy has been modified, and the subsequent processing by the service control entity is based on the modified The meeting strategy is carried out and the process ends.
  • FIG. 9 is another flow chart of deploying a conference policy by a Plain Old Telephone Service (POST) according to an embodiment of the present invention.
  • POST Plain Old Telephone Service
  • user A sends control signaling to the conference server through user equipment A to modify the conference policy.
  • the process can include the following steps:
  • Step 901 to step 903 the user equipment A sends an Invite message carrying the service code to the service control entity, and the conference policy to be modified is brought to the service control entity by using the Invite message; after receiving the Invite message, the service control entity passes and stores The internal interface between the servers sends a modification command to the storage server to modify the conference policy. The storage server returns the modification result to the service control entity through the internal interface.
  • Step 904 to step 907 after receiving the modification result, the service control entity determines that the modification is successful, and returns a 200 OK response indicating that the tampering succeeds to the user equipment A; after receiving the 200 OK response, the user equipment A returns an ACK to the service control entity.
  • the message, and the conference server can also play the prompt tone corresponding to the operation result for the user equipment A.
  • the MRF since the participation of the MRF is not required in the processes shown in FIG. 8 and FIG. 9, the MRF is not embodied in the conference server shown in FIG. 8 and FIG. 9, and the MRF is actually included in the conference server.
  • the MRF can control the use of the media playing resource by the designated conference participant according to the control information sent by the conference host. . Therefore, in actual applications, the conference host can deploy a conference policy that is difficult to deploy based on the new functions of the MRF, such as inserting a media stream in the conference and controlling the playback of the media stream.
  • the service control entity instructs the MRF to control the use rights of the conference participants in the multimedia play conference by using the SIP signaling that carries an indication that controls the use of the media play resource by the designated conference participant.
  • Convenient for conference participants with multimedia conference operation control rights, such as conference host to control media in multimedia conferences The use of playback resources facilitates the control of the progress of multimedia conferences.
  • the media information such as the media stream provided by the network side, to be inserted into the multimedia conference may be used as a special conference participant, and the service control entity may give a corresponding indication to indicate how the MRF is. Control the use of media streaming resources by media streams.

Abstract

L'invention porte, selon un mode de réalisation, sur un procédé de commande de conférence multimédia comprenant : la réception de l'indication envoyée par une entité de commande d'occupation pour commander les ressources de lecture multimédia occupées par le participant à la conférence indiqué ; ladite indication est transportée par le protocole d'ouverture de session (SIP) envoyé par l'entité de commande d'occupation ; la commande de l'occupation de ressources de lecture multimédia par le participant à la conférence indiqué selon l'indication. Les modes de réalisation de l'invention portent également sur un dispositif de commande de conférence multimédia et sur un dispositif de commande de message SIP. La solution proposée par les modes de réalisation de l'invention peut faciliter, pour le participant à la conférence qui a l'autorité de commande de conférence multimédia, la commande de la conférence multimédia.
PCT/CN2008/072762 2007-10-22 2008-10-21 Procédé et dispositif de commande de conférence multimédia WO2009056031A1 (fr)

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