WO2010135876A1 - Système et procédé de mise en oeuvre de conférence avec tableau blanc électronique sur la base de l'architecture du sous-système multimédia ip - Google Patents

Système et procédé de mise en oeuvre de conférence avec tableau blanc électronique sur la base de l'architecture du sous-système multimédia ip Download PDF

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Publication number
WO2010135876A1
WO2010135876A1 PCT/CN2009/073702 CN2009073702W WO2010135876A1 WO 2010135876 A1 WO2010135876 A1 WO 2010135876A1 CN 2009073702 W CN2009073702 W CN 2009073702W WO 2010135876 A1 WO2010135876 A1 WO 2010135876A1
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WIPO (PCT)
Prior art keywords
whiteboard
sip
mrs
page
terminal
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PCT/CN2009/073702
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English (en)
Chinese (zh)
Inventor
陈鹏
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中兴通讯股份有限公司
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Publication of WO2010135876A1 publication Critical patent/WO2010135876A1/fr

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Classifications

    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10—Architectures or entities
    • H04L65/1016—IP multimedia subsystem [IMS]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/1066—Session management
    • H04L65/1101—Session protocols
    • H04L65/1104—Session initiation protocol [SIP]

Definitions

  • the invention relates to the field of IMS intelligent network communication, in particular to an implementation system of an electronic whiteboard conference based on an IP multimedia system architecture.
  • IMS IP Multimedia Subsystem
  • SIP Session Initiation Protocol
  • Session Initiation Protocol is an application layer signaling control protocol used to create, modify, and release sessions for one or more participants. These sessions can be similar to Internet multimedia conferencing, IP telephony or multimedia distribution. Participants in a session can communicate via multicast, unicast, or a mixture of the two.
  • XMPP Extensible Messaging and Presence Protocol
  • IM instant messaging
  • online presence detection An extensible markup language (XML) protocol for instant messaging (IM), and online presence detection. It promotes quasi-instantaneous operation between servers. This protocol may eventually allow Internet users to send instant messages to anyone else on the Internet, even if their operating system and browser are different.
  • An electronic whiteboard (hereinafter referred to as a whiteboard) refers to a technology in which participants share data and collaborate in real time through an interface. Any participant's operation on the electronic whiteboard, including simple graphic drawing, text input, etc., can be performed in real time. Shared by other participants. More complex whiteboards support window sharing and local multimedia linking and embedding, and each graphic entity can be saved as an object to a file.
  • the technical problem to be solved by the present invention is to provide an electronic whiteboard conference implementation system and method for realizing the function of holding a whiteboard conference in an IMS architecture environment.
  • the present invention provides an electronic whiteboard conference implementation system, which includes an application server AS, a media resource server MRS, and at least two SIP terminals connected through a communication network, where
  • the AS is configured to perform whiteboard conference control on the SIP terminal and the MRS by using a session initiation protocol SIP signaling, including controlling the creation of a whiteboard conference and establishing an XMPP whiteboard conference channel of the scalable message processing field protocol;
  • the MRS is configured to establish an XMPP whiteboard conference channel with the SIP terminal, and receive and forward whiteboard operation control information between the SIP terminals through the XMPP whiteboard conference channel, to implement a whiteboard between the SIP terminals.
  • Information Sharing
  • the SIP terminal is configured to establish an XMPP whiteboard conference channel with the MRS, and perform whiteboard operation or control, and send or receive whiteboard operation control information through the XMPP whiteboard conference channel;
  • the SIP terminal when the SIP terminal creates a whiteboard page or a primitive, it is further configured to generate a globally unique whiteboard page identifier or a primitive identifier, where the SIP terminal and the MRS are further used to cache a whiteboard page or a map created or received. Meta-information, the SIP terminal or the MRS, when transmitting whiteboard operation control information about the whiteboard page or the meta-information information, using the whiteboard page or the primitive identifier, and according to the whiteboard page or the graphic element Identifies the complete information of the whiteboard page or primitive in the cache.
  • the SIP terminal and the MRS use the same page replacement algorithm and cache page
  • the number is cached, and the page replacement algorithm is a random algorithm, a first in first out algorithm, a least recently used algorithm, a longest unused algorithm, or a least frequently used algorithm or page failure frequency method.
  • the AS is further configured to control, by using SIP signaling, the rights of the SIP terminal and the status of the channel, where the rights of the SIP terminal are information receiving rights, whiteboard operation rights, or whiteboard control rights, and the corresponding channel status is The one-way receiving media stream status or the bidirectional receiving and receiving media stream status, the whiteboard operation right refers to the right to add, modify, and delete the primitive operation on the current whiteboard page; the whiteboard control right includes the whiteboard operation right and the creation, opening, and deletion of the whiteboard page and The right to turn pages.
  • the present invention further provides a method for implementing an electronic whiteboard conference, which is implemented by an application server AS, a media resource server MRS, and at least one SIP terminal connected to a communication network, including:
  • the AS establishes a whiteboard conference by using a session initiation protocol to perform signaling interaction with the SIP terminal and the MRS, and controls the SIP terminal and the MRS to establish an XMPP whiteboard conference channel between the SIP terminal and the MRS.
  • a SIP terminal with whiteboard operation or control performs whiteboard operations or control and generates operational control information
  • the SIP terminal having the whiteboard operation or control right sends the operation control information to the MRS through the corresponding XMPP whiteboard conference channel;
  • the method further includes:
  • the MRS is received and forwarded to other SIM terminals through the corresponding XMPP whiteboard conference channel. Further, when the SIP terminal creates a whiteboard page or a primitive, a globally unique whiteboard page identifier or a primitive identifier is generated, and the SIP terminal and the MRS cache the whiteboard page or the primitive information created or received. Sending, by the SIP terminal or the MRS, the whiteboard operation control information about the whiteboard page or the meta-information information, using the whiteboard page or the graphic identifier, and according to the received whiteboard page or the graphic identifier Find complete information about the whiteboard page or element in the cache.
  • the whiteboard operation right refers to the right to add, modify, and delete the primitive operation on the current whiteboard page;
  • the whiteboard control right includes the whiteboard operation right and the right to create, open, delete the whiteboard page, and turn the page.
  • the present invention also provides a method for implementing an electronic whiteboard conference based on an IP multimedia system architecture, which is based on an application server AS, a media resource server MRS, a SIP host terminal, and at least one SIP conference connected through a communication network.
  • the terminal implementation, the process of creating a whiteboard meeting includes:
  • the method includes: the AS requests the SIP host terminal to apply for a conference media channel to the MRS; the MRS prepares a media channel resource, and notifies the AS through the AS a SIP host terminal; the XMPP whiteboard conference channel is established between the SIP host terminal and the MRS;
  • the method includes: the AS applying the virtual media information to the SIP participant terminal to apply for the conference media channel; the MRS preparing the media channel resource, and notifying the a SIP participant terminal; the SIP participant terminal notifies the MRS of the real media information through the AS; and the XMPP whiteboard conference channel is established between the SIP participant terminal and the MRS.
  • the whiteboard operation control process of the whiteboard meeting includes:
  • the SIP host terminal or the participant terminal performs whiteboard operation or control and generates operation control information, where the whiteboard operation refers to the right to add, modify, or delete a primitive on the current whiteboard page, where the whiteboard control refers to creation, opening, and Delete the whiteboard page or turn the page;
  • the SIP host terminal or the participant terminal sends operation control information to the MRS through an XMPP whiteboard negotiation channel between the SIP host and the MRS.
  • the whiteboard operation control process of the whiteboard conference further includes:
  • the MRS receives the operation control information and passes between it and other participant terminals
  • the XMPP whiteboard conference channel forwards the operation control information to other participant terminals;
  • the other participant terminal receives the operation control information.
  • the whiteboard page or primitive is created by the SIP host terminal or participant
  • the terminal generates a globally unique whiteboard page identifier or a primitive identifier, and the SIP host terminal, the SIP participant terminal, and the whiteboard page or network element information created or received by the MRS cache, and the whiteboard page identifier or the primitive identifier;
  • the operation control information includes the whiteboard page or the meta information and the whiteboard page identifier or The identifier of the picture element, in the operation control information, carrying the whiteboard page identifier or the picture element identifier of the whiteboard page or the picture element, the SIP host terminal, the SIP participant terminal, and the MRS Searching for the cache according to the whiteboard page identifier or the primitive identifier. If not found, requesting the SIP host terminal, the SIP participant terminal, and the MRS to send a complete whiteboard page or primitive information.
  • the whiteboard conference realization system and method of the present invention realizes the sharing of data in the whiteboard conference through the established XMPP whiteboard conference channel, realizes the function of holding the whiteboard conference in the IMS architecture environment, and the whiteboard can synchronously modify, turn pages, mark, and operate the authority control. flexible.
  • FIG. 1 is a schematic diagram of an implementation system of an electronic whiteboard conference based on an IMS architecture according to the present invention.
  • FIG. 2 is a flow chart of a method for implementing an electronic whiteboard conference based on an IMS architecture according to the present invention.
  • FIG. 3 is a signaling flow diagram of the creation of a whiteboard conference of the present invention.
  • FIGS 4 and 5 are the media signaling flow chart of the whiteboard conference of the present invention.
  • Figure 6 is a flow chart of the authority application of the whiteboard meeting of the present invention.
  • the present invention provides an implementation system of an electronic whiteboard conference based on an IP Multimedia System Architecture (IMS).
  • the system 1 includes an application server AS (Applicant Server) 20 connected through a communication network 10, and a media resource server.
  • AS Applicant Server
  • MRS Multimedia Resource Server
  • SIP terminals terminal 1, terminal 2
  • the application server 20 is configured to perform whiteboard conference control on the SIP terminal and the MRS by using SIP signaling, and the control content includes creating and deleting a whiteboard conference, joining and withdrawing members, issuing, changing rights, and establishing and disconnecting channels.
  • the MRS 30 is configured to establish an XMPP whiteboard conference channel with the SIP terminal, and receive and forward whiteboard operation control information between the SIP terminals through the XMPP whiteboard conference channel, to implement a whiteboard between the SIP terminals.
  • Information Sharing
  • the SIP terminal is configured to establish an XMPP whiteboard conference channel with the MRS, and perform whiteboard operation or control, and send or receive whiteboard operation control information through the XMPP whiteboard conference channel.
  • the whiteboard control performed by the SIP terminal includes creating and deleting a whiteboard page, turning the page, and the operation of the whiteboard includes adding, modifying, or deleting the primitive of the current whiteboard page;
  • the application server AS 20 can also be arranged to have modules of the same function integrated in the media resource server MRS 30.
  • Network 10 can be an access gateway.
  • the present invention also provides a method for implementing an electronic whiteboard conference based on an IP multimedia system architecture.
  • the method is implemented by an application server AS, a media resource server MRS, and at least one SIP terminal connected by a communication network, including:
  • Step 201 The AS uses SIP (Session Initiation Protocol) to perform signaling interaction with the SIP terminal and the MRS to create a whiteboard conference, and controls the SIP terminal and the MRS to establish an XMPP between the SIP terminal and the MRS (Extensible Messaging and Presence Protocol). , extensible message processing field protocol) whiteboard conference channel;
  • SIP Session Initiation Protocol
  • XMPP Extensible Messaging and Presence Protocol
  • XMPP extensible message processing field protocol
  • SIP is used to initiate, manage, and terminate data sessions in a packet network, and in particular, to generate, modify, and terminate sessions between one or more participants.
  • UE#1 that is, the terminal as the moderator (or the moderator terminal) interacts with the MRS to create a whiteboard conference and an XMP0P whiteboard conference channel, and then invites other terminal UE#2 to join the whiteboard conference as a conference member.
  • the corresponding XMPP whiteboard conference channel is also established between these terminals UE#2 and MRS;
  • Step 202 The SIP terminal performs whiteboard operation or control and generates whiteboard operation control information.
  • the SIP terminal that performs whiteboard operation or control is a terminal that has whiteboard operation or control right.
  • the whiteboard operation right refers to adding the current whiteboard page by using the whiteboard tool.
  • the right to modify and delete the element operation; the whiteboard control rights include the right to operate the whiteboard and the right to create, open, delete the whiteboard page and turn the page; in a whiteboard meeting, only one participant can have the whiteboard control right. But there can be Multiple participants have the right to operate the whiteboard, and the creator of the meeting can make authorizations or change permissions.
  • the whiteboard page can be divided into a structured whiteboard page (without any primitives, representing only one intermediate hierarchy) and the actual whiteboard page.
  • the actual whiteboard page contains multiple primitives.
  • all the primitive information is sent every time the page is turned, and some of the primitives may be just one identifier; all the page information referred to in the present invention refers to The element in the whiteboard page is the actual content, not the identity.
  • Step 203 The SIP terminal sends the generated operation control information to the MRS through the corresponding XMPP whiteboard conference channel, and records the sent whiteboard page;
  • the content should be Base64 encoded so that
  • Step 204 The MRS saves the whiteboard page according to the page replacement policy, and simultaneously receives and forwards to the other participating SIM terminals through the corresponding XMPP whiteboard conference channel;
  • the rights of the SIP terminal include three types: the information receiving right, the whiteboard operating right, and the whiteboard control right.
  • the status of the channel includes two-way receiving and receiving media stream status and one-way receiving media stream status, and the SIP terminal sends or transmits through the AS. Receive permission change signaling, and modify the permission status and channel status according to the received permission change signaling.
  • Step 205 The other SIM terminal receives and updates the display according to the operation control information, and the current whiteboard page is temporarily stored in the memory instead of being stored on the hard disk, thus having certain security.
  • the whiteboard page created by the whiteboard control should be cached locally on the MRS and other terminals, which can effectively save network bandwidth and improve page turning. Efficiency and synchronization,
  • the terminal 1 and the terminal 2 in FIG. 1 are taken as an example.
  • One terminal is labeled as UE#1, and the other terminal is labeled as UE#2, as a conference member.
  • the specific implementation is as follows:
  • UE#1 When UE#1 first sends a whiteboard page, it records the identification information of the whiteboard page (ie, the whiteboard page)
  • the whiteboard page ID when the whiteboard page needs to be sent again, only the identification information of the whiteboard page can be sent. In order to ensure the uniqueness of the whiteboard page, the whiteboard page ID should use the GUID (Globally Unique Identifier), which can ensure that white pages will not be generated after the whiteboard control is changed. Board page ID conflicts;
  • the MRS caches a certain number of whiteboard pages.
  • the whiteboard page is received as the identification information, the information of the whiteboard page is searched in the cache. If not found, the notification is sent to the UE#1 requesting to resend the complete whiteboard page information. If found, the whiteboard page is forwarded directly to UE#2 by MRS, and the whiteboard page replacement policy/algorithm is selected to save the whiteboard page.
  • the whiteboard page replacement algorithm can use random algorithm (RAND), first in first out (FIFO), Least Recently Used (LRU), oldest unused algorithm or least often.
  • RAND random algorithm
  • FIFO first in first out
  • LRU Least Recently Used
  • LFU Least Frequently Used
  • PFF page fault frequency
  • UE#2 caches all or a certain number of whiteboard pages. When receiving the ID of a whiteboard page, it searches for the corresponding whiteboard page in the cache. If it is not found, it sends a notification to the MRS requesting to resend the actual whiteboard page information. If found, the whiteboard page of the ID is displayed by UE#2, and the whiteboard page replacement policy/algorithm is selected to save the whiteboard page of the ID.
  • the SIP terminal and the MRS use the same page replacement policy and the number of cache pages to ensure the consistency of the whiteboard pages cached by the SIP terminal and the MRS, thereby improving the hit rate of the link page lookup.
  • a SIP host terminal there should be a SIP host terminal and at least one SIP participant terminal.
  • the process of creating a whiteboard meeting includes:
  • the AS creates a whiteboard conference, and forwards the request to the MRS.
  • the step includes: the AS applying for the conference media to the MRS for the SIP host terminal
  • the MRS prepares a media channel resource, and notifies the SIP host terminal through the AS; the XMPP whiteboard conference channel is established between the SIP host terminal and the MRS;
  • the step includes: the AS applying the virtual media information to the SIP participant terminal to apply for a conference media channel; and the MRS prepares the media channel resource, and the The AS notifies the SIP participant terminal; the SIP participant terminal notifies the MRS of the real media information through the AS; and the XMPP whiteboard conference channel is established between the SIP participant terminal and the MRS.
  • the signaling process for the whiteboard conference creation process is as follows:
  • Step 301 UE#1 (host terminal) sends an INVITE0 request with SDP (Session Description Protocol) information to the AS, and the SDP carries the TCP connection information (IP address and port number of the terminal for XMPP).
  • SDP Session Description Protocol
  • TCP connection information IP address and port number of the terminal for XMPP.
  • the SDP protocol is a protocol used to describe multimedia session announcements, multimedia session invitations, and other forms of multimedia session initialization.
  • Step 302 The AS forwards the SIP signaling sent by the UE#1 to the AS to the MRS.
  • the MRS creates a whiteboard conference according to the SDP information, indicating the number of conference members. If the conference is successfully created, the response is 200 OK(), and the AS returns after receiving the reply.
  • Steps 305 ⁇ 309 If the whiteboard conference is successfully created, the AS sends INVITE() signaling to the MRS, requests to join the UE#1 to the conference, obtains a successful response of the MRS 200 OK(), and returns ACK() to the MRS, and then the AS Returning the media channel information prepared by the MRS to the UE#1 to the UE#1, and establishing an XMPP whiteboard conference channel between the UE#1 and the MRS;
  • Step 310 318 At this time, UE#2 has not agreed to join the conference, and does not inform the AS of its media information.
  • the AS To add UE#2 to the MRS, the AS first virtualizes a UE#2 terminal with certain media information, and the AS sends the message to the MRS.
  • the media information of the virtual UE#2 is brought to the MRS in the INVITE signaling, and the conference media channel is requested for the UE#2, and the MRS performs media negotiation and returns 200 OK(), where the media information carrying the MRS, AS After receiving the reply, it returns ACK(), and the AS then sends the INVITE signaling with the MRS media information to invite UE#2 to join the whiteboard conference, if UE#2 agrees to join the conference, then adds its own real media information in the reply signaling 200 ⁇ (), and sends it to the AS, and then the AS modifies the media of UE#2 on the MRS by sending RE-INVITE signaling to the MRS.
  • the MRS replies with 200 OK(), and the AS returns ACK() after receiving the reply; and then the MRS notifies the UE#2 that the MRS resource is ready, and the correct XMPP whiteboard conference channel can be established between the MRS and the UE#2;
  • Steps 319 ⁇ 320 The AS notifies UE#1 through SIP signaling, UE#2 has joined the conference, and UE#1 replies 200 OK() to the AS.
  • the whiteboard conference and its dedicated XMPP whiteboard conference channel have been created.
  • the whiteboard operation control sharing process of the whiteboard meeting includes:
  • the SIP host terminal or the participant terminal performs whiteboard operation or control and generates operation control information, where the whiteboard operation refers to the right to add, modify, or delete a primitive on the current whiteboard page, where the whiteboard control refers to creation, Open, delete whiteboard pages or turn pages;
  • the SIP host terminal or the participant terminal sends operation control information to the MRS through an XMPP whiteboard conference channel between the SIP host and the MRS;
  • the MRS receives the operation control information, and forwards the operation control information to other participant terminals through an XMPP whiteboard conference channel between the MRSP and other participant terminals;
  • the whiteboard page or the primitive is generated by the SIP host terminal or the participant terminal to generate a globally unique whiteboard page identifier or primitive. Identifying, the SIP host terminal, the SIP participant terminal, and the whiteboard page or network element information created or received by the MRS cache, and the whiteboard page identifier or the primitive identifier; the SIP host terminal, the SIP attending session
  • the operation control information includes the whiteboard page or the meta-information and the whiteboard page identifier or the graphic identifier, and when the second transmission is performed,
  • the operation control information carries the whiteboard page identifier or the network element identifier of the whiteboard page or the network element, and the SIP host terminal, the SIP participant terminal, and the MRS are searched according to the whiteboard page identifier or the network element identifier. Cache, if not found, then
  • the whiteboard media signaling process of the whiteboard conference specifically includes:
  • Step 401 UE#1 (host terminal) creates or opens a whiteboard page, and when the page is turned, sends whiteboard page information to the MRS through the XMPP whiteboard conference channel;
  • Step 402 If the MRS receives the ID of the whiteboard page of the UE#1, and the information of the whiteboard page is not on the MRS, send the iq to the UE#1 (Information Query information query, similar to HTTP, is also a request/ Responsive message) request message, request complete whiteboard page information, go to step 403; if it is complete whiteboard page information, directly forward to UE#2, and select a reasonable whiteboard page replacement strategy/algorithm to save the whiteboard page , go to step 404;
  • Information Query information query similar to HTTP, is also a request/ Responsive message
  • Step 403 The UE#1 responds to the MRS iq request message to reply to the complete whiteboard page information.
  • Step 405 If UE#2 receives only the ID of the whiteboard page, and UE#2 does not find the corresponding whiteboard page locally, send an iq message to the MRS to request complete whiteboard page information, and then go to step 406; otherwise, Display the whiteboard page in the whiteboard page, and select a reasonable document page replacement strategy/algorithm to save the whiteboard page;
  • Step 406 The MRS responds to the iq request message of UE#2, and returns complete whiteboard page information to UE#2, and if the corresponding complete whiteboard page information is not found, the MRS direct reply error may be retrieved, or MRS to UE#1 Requesting complete whiteboard page information, and then forwarding to UE#2 and other methods again;
  • Steps 407-408 UE#1 generates a whiteboard page identifier for the current whiteboard page, and identifies the whiteboard page identifier The information is sent to the MRS, and the MRS saves and forwards the corresponding whiteboard page identification information to the UE#2.
  • the SIP terminal caches the complete whiteboard page information, the primitive information and the identification information, and the MRS caches only the identification information of the currently active whiteboard page through the related replacement algorithm, thereby saving storage resources on the MRS and improving the MRS whiteboard conference.
  • Method 2 All the information is saved by the MRS, including the whiteboard page information, the graphic element information, and the identification information.
  • the terminal that obtains the whiteboard control right can conveniently obtain the whiteboard page or the network element information to be operated.
  • the media signaling process of the whiteboard conference specifically includes:
  • Step 501 UE#1 creates a new primitive on the current whiteboard page, and sends the information of the primitive to the MRS through the XMPP whiteboard conference channel.
  • the primitive information must also include the map.
  • Step 502 The MRS receives the information of adding a certain primitive, updates the page information in the current page on the MRS, adds the primitive information, and then forwards the primitive information to the UE#2. After receiving the information, the UE#2 receives the information. Add the primitive to the corresponding position and level of the current page
  • Step 503 UE#1 modifies a certain picture element on the current whiteboard page, and sends the modification information of the picture element to the MRS through the XMPP whiteboard conference channel.
  • the picture element modification information must also include The whiteboard page ID to which the primitive belongs, the coordinates and hierarchy of the location where the primitive is located;
  • Step 504 The MRS receives the information for modifying a certain primitive, updates the page information in the current page on the MRS, updates the primitive information, and then forwards the modification information of the primitive to the UE#2. After receiving the information, the UE#2 receives the information. , updating the primitive information;
  • Step 505 The UE#1 deletes a certain primitive on the current whiteboard page, and sends the information of deleting the primitive to the MRS through the XMPP whiteboard conference channel.
  • Step 506 The MRS receives the information of deleting a picture element, updates the page information in the current page on the MRS, deletes the picture element, and then forwards the information of deleting the picture element to the UE#2.
  • the UE#2 receives the information. Delete the element in the current page.
  • UE#2 can also add, modify, and delete primitives, send the information to the MRS, and then the MRS forwards the information to UE#1, and UE#1 completes the corresponding operation.
  • the authority of the SIP host terminal is a whiteboard control right
  • the status of the XMPP whiteboard conference channel between the MRS and the MRS is a bidirectional transmission and reception media stream state
  • the SIP participant terminal is a whiteboard operation right or information reception.
  • the corresponding XMPP whiteboard conference channel status is a bidirectional receiving and receiving media stream state or a unidirectional receiving media stream state
  • the process of changing the permission of the whiteboard meeting includes:
  • the requesting party sends a change permission request to the requested party by using the AS, where the requestor or the requested party refers to the SIP host terminal or the SIP participant terminal;
  • C3 The AS notifies the other party other than the requester that the requestor authority status changes.
  • the signaling process for applying the operation right of UE#2 includes:
  • Step 601 602 UE#2 (general member participating in the conference) sends an INFO0 message with the application authority information to the AS, and the AS replies 200 OK() to UE#2;
  • Steps 603 ⁇ 604 The AS forwards the INFO() message requested by the UE#2 to the UE#1 (host terminal), and the UE#1 replies 200 OK() to the AS;
  • Steps 605 ⁇ 608 The AS sends an INFO() message to UE#2, changes the state of the UE#2 in the whiteboard conference to "applying operation right", UE#2 replies 200 OK() to the AS, and the AS forwards the INFO(). Message to UE#1, UE#1 replies 200 OK() to AS;
  • Steps 609-610 UE#1 returns the authorization result to the AS through the INFO0 message-authorization; Steps 611 ⁇ 613: The AS sends the RE-INVITE() message to the MRS, and the XMPP whiteboard conference channel of the UE#2 on the MRS is modified. Two-way sending and receiving media stream status "sendrecv", MRS replies 200 OK() to AS, and AS returns ACK() after receiving reply;
  • Step 614 615 The AS sends an INFO() message with the successful result of the application to the UE#2, and notifies the UE#2 to obtain the control or operation right of the whiteboard conference, and the UE#2 replies 200 OK() to the AS;
  • Steps 616 ⁇ 618 The AS sends a RE-INVITE() message to the UE#2, and the XMPP whiteboard conference channel of the UE#2 is modified to be "sendrecv", and the UE#2 replies 200 ⁇ () to the AS, and the AS returns an ACK after receiving the reply. ();
  • Steps 619-622 The AS sends a NOTIFY() message with the UE#2 status to the UE#1, and notifies the participant of the site status change: UE#2 obtains control or operation rights; UE#1 reply 200 OK () to AS, AS sends a NOTIFY0 message with UE#2 status with relevant authority to UE#2, and UE#2 replies with 200 OK().
  • the above process is also applicable to the change of the control rights.
  • the rights change is sent to the UE#1 and the UE#2 in the last steps 619 and 621 of the process respectively.
  • the UE#1 and the UE#2 receive the notify, the rights are issued according to the notify. Change your own permission status. If UE#2 does not have the right to operate and applies for control, it will obtain the operation right at the same time. The channel status will be changed to "sendrecv" in the corresponding step.
  • the terminal has three different rights including information receiving right, whiteboard operation right and whiteboard control right.
  • the corresponding XMPP whiteboard conference channel status is one-way receiving media stream status "recv” and bidirectional receiving media stream status "sendrecv”.
  • the electronic whiteboard conference implementation system of the present invention is specifically as follows:
  • the electronic whiteboard conference implementation system based on the IP multimedia system architecture comprises an application server AS, a media resource server MRS and at least two SIPs connected through a communication network.
  • a terminal where the AS includes a transceiver module, a conference management module, and a channel control module that are sequentially connected, and a rights management module that is connected to the conference management module, where
  • transceiver module configured to send and receive SIP signaling between the SIP terminal and the MRS
  • conference control module configured to perform whiteboard conference control on the SIP terminal and the MRS, including whiteboard conference creation, deletion, and participation
  • the SIP terminal joins and exits;
  • a channel control module configured to perform whiteboard conference channel management on the SIP terminal and the MRS, including establishing and deleting a channel, and when the channel is established, including requesting, by the SIP terminal, the conference media channel resource to the MRS, and receiving Resource ready information sent by the MRS and forwarded to the SIP terminal;
  • the privilege control module is configured to perform management control on the privilege of the SIP terminal and the state of the XMPP whiteboard conference channel.
  • the MRS includes a transceiver module and a channel establishment module, wherein the transceiver module is configured to send and receive SIP signaling between the AS and the AS, and receive and forward between the SIP terminal through the XMPP whiteboard conference channel.
  • Whiteboard operation control information ;
  • the channel management module is configured to perform conference media resource management, and establish and delete an XMPP whiteboard conference channel with the SIP terminal, and also manage the state of the XMPP whiteboard conference channel.
  • the shared information management module is configured to buffer the received whiteboard operation control information, and query the cache according to the received whiteboard page or the element identifier, and obtain the complete whiteboard page or the meta information from the SIP terminal.
  • the SIP terminal includes a transceiver module and a whiteboard operation control module and a channel establishment module connected to the transceiver module, where
  • a transceiver module configured to send and receive SIP signaling between the AS and the AS, and send and receive whiteboard operation control information sent by the MRS to the MRS through an XMPP whiteboard conference channel; and a whiteboard operation control module, configured to perform whiteboard operation on the whiteboard Operation or control, and generate whiteboard operation control information; also used to cache received or created whiteboard operation control information, and generate a globally unique whiteboard page identifier or primitive identifier when creating a whiteboard page or primitive, and send the location
  • the operation control information carries the whiteboard page identifier or the graphic element identifier; when the whiteboard page or the network element information is sent twice, only the whiteboard page identifier or the whiteboard page identifier or the network element identifier of the network element is sent; and according to the received
  • the whiteboard page identifier or the network element identifier search cache in the operation control information is used to request the MRS to send a complete whiteboard page or network element information if not found.
  • the operation of the whiteboard includes adding, modifying, or deleting primitives on the current whiteboard page, and controlling the whiteboard includes creating, opening, deleting, or flipping the whiteboard page.
  • the whiteboard conference implementation system and method of the present invention realizes the sharing of data in the whiteboard conference through the established XMPP whiteboard conference channel, and realizes the function of holding the whiteboard conference in the IMS architecture environment, and white
  • the board can be modified, paged, marked, and flexible in operation control.
  • the whiteboard conference realization system and method of the present invention realizes the sharing of data in the whiteboard conference through the established XMPP whiteboard conference channel, realizes the function of holding the whiteboard conference in the IMS architecture environment, and the whiteboard can synchronously modify, turn pages, mark, and operate the authority control. flexible.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • General Engineering & Computer Science (AREA)
  • Business, Economics & Management (AREA)
  • General Business, Economics & Management (AREA)
  • Telephonic Communication Services (AREA)

Abstract

La présente invention porte sur un système de mise en œuvre de conférence avec tableau blanc électronique sur la base de l'architecture du sous-système multimédia IP (IMS), et le système comprend un serveur d'application (AS), un serveur de ressource multimédia (MRS) et au moins deux terminaux de protocole d'ouverture de session (SIP), qui sont connectés par le réseau de communication. L'AS est utilisé pour traiter une commande de conférence avec tableau blanc des terminaux SIP et du MRS par l'intermédiaire de la signalisation SIP; le MRS est utilisé pour établir des canaux de conférence avec tableau blanc en protocole extensible de messagerie et de présence (XMPP) entre le MRS et les terminaux SIP, et recevoir et transférer les informations de commande de manipulation de tableau blanc parmi les terminaux SIP par l'intermédiaire des canaux de conférence avec tableau blanc XMPP, pour ainsi mettre en œuvre un partage d'informations de tableau blanc parmi les terminaux SIP; les terminaux SIP sont utilisés pour établir les canaux de conférence avec tableau blanc XMPP entre les terminaux SIP et le MRS, traiter la manipulation ou la commande du tableau blanc, et envoyer ou recevoir des informations de commande de manipulation de tableau blanc par l'intermédiaire des canaux de conférence avec tableau blanc XMPP. Le système et le procédé de la présente invention mettent en œuvre la fonction d'appel d'une conférence avec tableau blanc électronique dans l'environnement d'architecture IMS.
PCT/CN2009/073702 2009-05-27 2009-09-02 Système et procédé de mise en oeuvre de conférence avec tableau blanc électronique sur la base de l'architecture du sous-système multimédia ip WO2010135876A1 (fr)

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