WO2011006331A1 - 一种无线视频会议的实现方法、系统及终端 - Google Patents

一种无线视频会议的实现方法、系统及终端 Download PDF

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Publication number
WO2011006331A1
WO2011006331A1 PCT/CN2009/075449 CN2009075449W WO2011006331A1 WO 2011006331 A1 WO2011006331 A1 WO 2011006331A1 CN 2009075449 W CN2009075449 W CN 2009075449W WO 2011006331 A1 WO2011006331 A1 WO 2011006331A1
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WIPO (PCT)
Prior art keywords
pcn
conference
video
initiator
information
Prior art date
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PCT/CN2009/075449
Other languages
English (en)
French (fr)
Inventor
李继朝
凌勇
曾稹卓
Original Assignee
中兴通讯股份有限公司
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 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to EP09847256.6A priority Critical patent/EP2448364B1/en
Priority to US13/258,087 priority patent/US20120120179A1/en
Publication of WO2011006331A1 publication Critical patent/WO2011006331A1/zh

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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
    • H04L12/1818—Conference organisation arrangements, e.g. handling schedules, setting up parameters needed by nodes to attend a conference, booking network resources, notifying involved parties
    • 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
    • H04L65/4046—Arrangements for multi-party communication, e.g. for conferences with distributed floor control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/14—Systems for two-way working
    • H04N7/141—Systems for two-way working between two video terminals, e.g. videophone
    • H04N7/148—Interfacing a video terminal to a particular transmission medium, e.g. ISDN
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/14—Systems for two-way working
    • H04N7/15—Conference systems
    • H04N7/152—Multipoint control units therefor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/40—Connection management for selective distribution or broadcast

Definitions

  • the present invention relates to a wireless video conferencing technology, and in particular, to a method, system and terminal for implementing a wireless video conference. Background technique
  • the wireless broadband network structure is as shown in FIG. 1.
  • the wireless access terminal (AT) 11 maintains data communication with the wireless access network (RAN, Residential Access Network) 12 through the air interface (UM interface); wherein the AT 11 is equipped with a camera, Video and audio collection equipment such as a microphone;
  • RAN 12 is connected to a packet core network (PCN) through an A interface;
  • PCN 13 communicates with an external Internet protocol (IP, Internet Protocol) through a parallel interconnection interface (Pi interface)
  • IP Internet Protocol
  • Pi interface parallel interconnection interface
  • the network 14 is connected to the Internet, and the Pi interface complies with the IS-835 standard.
  • the AT has the function of collecting video and audio data, and the AT is connected to the PCN by accessing the RAN, thereby accessing the wireless broadband network system.
  • the AT and the accessed wireless broadband network system there is currently no control over the information flow between the multiple ATs, including: control of audio and/or video streams, control of data streams, etc.; Only two-party video calls can be provided, and multi-party video calling functions cannot be provided, and thus multi-party wireless video conferencing functions cannot be provided.
  • the main purpose of the present invention is to provide a method, system, and terminal for implementing a wireless video conference, which can implement multi-party wireless video conference.
  • the present invention provides a method for implementing a wireless video conference, the method comprising:
  • the initiator AT initiates a conference request to the PCN, and the PCN performs a conference invitation according to the conference invitee list carried in the received conference request, establishes radio resources and initializes each AT participating in the wireless video conference, and sends conference member information to participate in the wireless video conference.
  • the storage is performed by the initiator AT to complete the establishment of the wireless video conference system;
  • the PCN After the wireless video conference system is successfully established, the PCN receives the signaling flow of the AT in the wireless video conference system, and transmits the received signaling flow to the initiator AT, and the initiator AT according to the signaling in the received signaling flow. Sending control commands to the PCN controls the distribution of information streams by the PCN to the wireless video conferencing system.
  • the conference request includes: a conference invitee list, its own high priority authority, and a right assigned to the AT in the conference inviter list.
  • the establishing, by the PCN, the radio resource and the initialization of the AT the PCN receives the conference request, and after the AT authentication and authorization of the initiator is successful, the PCN establishes a radio resource to the initiator AT, and sends the radio resource.
  • Point to Point Protocol PPP initializes information to the initiator AT, and assigns an IP address to the initiator AT; when the PCN receives the participation conference instruction returned by the participant AT, the PCN establishes a radio resource to the participant AT, Send PPP initialization information and assign an IP address.
  • PPP Point to Point Protocol
  • the conference member information is specifically: a conference member list, a high priority authority of the initiator AT, a right of the participant AT participating in the wireless video conference, and an IP address of all the ATs.
  • the PCN receives the signaling flow of the AT in the wireless video conference system.
  • the PCN receives the signaling flow of the participant AT and the initiator AT through the RAN, where the signaling flow includes: a speech request instruction, a video request instruction, and a data sharing request instruction.
  • the initiator AT sends a control command to the PCN according to the signaling in the received signaling flow, which is: the initiator AT receives the signaling flow sent by the PCN, and parses and processes the signaling therein. And sending a control command to the PCN according to the result of the parsing process.
  • the controlling PCN distributes the information flow in the wireless video conference system: the PCN receives and sends the audio and/or video stream of the AT of the utterance request according to the utterance permission instruction of the initiator AT; and/or, the PCN is based on The data sharing instruction of the originator AT performs a distribution data stream; and/or, the PCN distributes the video stream according to the video distribution instruction of the initiator AT; and/or, the PCN releases all UM interface radio resources according to the conference end instruction of the initiator AT.
  • the present invention also provides an implementation system for a wireless video conference, the system comprising: an initiator AT, configured to initiate a conference request, send and receive a signaling stream and an information stream, and perform signaling in the received signaling stream. Performing parsing processing, sending control commands, and controlling PCN to distribute the information and streams in the wireless video conferencing system;
  • Participant AT used to participate in wireless video conferences, send and receive signaling streams and information streams, and process the received information streams;
  • the PCN is configured to perform a conference invitation according to the conference invitee list carried in the received conference request, and establish radio resources and initialization for each AT participating in the wireless video conference; and simultaneously receive and send the signaling flow and the information flow of each AT. And distributing the information flow according to the control instruction of the initiator AT.
  • the system further includes: a RAN, used for signaling flow and information flow in the transit system.
  • the initiator AT further includes:
  • a first information processing module configured to send and receive a signaling flow and an information flow by using a RAN
  • a terminal control module configured to process the signaling flow and the information flow received by the RAN, and Sending, by the RAN, a control instruction for controlling the PCN to distribute the information flow
  • a first audio and video module configured to convert the audio and/or video stream received by the first information processing module to the PCN into voice and/or video;
  • the initiator AT further includes:
  • a first audio and video collection module configured to collect audio and/or video data of itself, and send audio and/or video streams to the PCN under the call of the first information processing module;
  • the first data storage module is configured to send the data stored by the first information processing module to the PCN via the RAN, or store the data stream distributed by the PCN received by the first information processing module.
  • the participant AT further includes:
  • a second information processing module configured to send and receive a signaling stream and an information stream through the RAN; and a second audio and video module, configured to convert the audio and/or video stream received by the second information processing module to the PCN into voice and/or Or video.
  • the participant AT further includes:
  • a second audio and video collection module configured to collect audio and video data of itself, and send audio and video streams to the PCN under the call of the second information processing module;
  • a second data storage module configured to send, by the second information processing module, the data stored by the second information processing module to the PCN, or store the data stream distributed by the PCN received by the second information processing module.
  • the invention also provides an AT, the AT comprising:
  • An information processing module configured to send and receive a signaling stream and an information stream
  • a terminal control module configured to, when acting as the initiator AT, send a control instruction for controlling the PCN to distribute the information flow, and process the received signaling flow and the information flow;
  • an audio and video module configured to convert the audio and/or video stream distributed by the PCN received by the information processing module into voice and/or video.
  • the AT further comprises:
  • An audio and video collection module configured to collect audio and/or video data of itself, and send audio and/or video streams to the PCN under the call of the information processing module;
  • the data storage module is configured to send, by the information processing module, the data stored by itself to the PCN via the RAN, or store the data stream distributed by the PCN received by the information processing module.
  • the method, system and terminal for implementing a wireless video conference provided by the present invention, by transmitting signaling in a wireless video conference system to an initiator AT, the initiator AT generates a control instruction according to the received signaling, and the control instruction is The PCN sends the information flow in the wireless video conference system according to the control command, so that each AT in the wireless video conference system can obtain the required information flow by sending signaling, thereby implementing multi-party wireless video conference.
  • the present invention controls the establishment of the entire wireless video conference system and the distribution of information streams during the implementation of the wireless video conference by the initiator AT, so that unified wireless video conference control can be ensured while implementing multi-party wireless video conferences.
  • Wireless video conferencing is safer, more reliable, and more efficient.
  • Figure 1 is a schematic diagram of a wireless broadband system network architecture
  • FIG. 2 is a schematic flowchart of implementing a wireless video conference method according to the present invention.
  • FIG. 3 is a schematic structural diagram of implementing a wireless video conference system according to the present invention.
  • FIG. 4 is a schematic structural diagram of an AT according to the present invention. detailed description
  • the initiator AT acts as the information flow controller, generates a control command and sends it to the PCN, and the PCN then completes the distribution of the information stream in the wireless video conference system according to the control command.
  • a method for implementing a wireless video conference according to the present invention is as shown in FIG. 2, and includes the following steps: Step 201: The initiator AT sends a conference request to the PCN via the RAN. The PCN receives the conference request, performs a conference invitation according to the conference inviter list carried therein, and establishes a radio resource for each AT participating in the wireless video conference, and completes the wireless video conference system. Establishment
  • the step is specifically: sending, by the initiator AT, the conference request to the PCN via the RAN, where the conference request includes: a conference invitee list, a high priority authority of the conference, and a right assigned to the AT in the conference inviter list;
  • the RAN sends the conference request to the PCN.
  • the PCN authenticates and authorizes the initiator AT.
  • the PCN establishes a radio resource to the initiator AT, and sends the PPP initialization information to the initiator.
  • the PCN sends a conference invitation through the RAN according to the conference inviter list in the conference request, and the AT that receives the conference invitation returns to participate in or not participate in the conference instruction;
  • the PCN When the PCN receives the participation instruction, the PCN establishes a radio resource to the participant AT, sends the PPP initialization information, and assigns an IP address. After all the AT resources of the participant AT are successfully established, the PCN sends the conference member information to the initiator through the RAN.
  • the party AT stores, including: a conference member list, a high priority authority of the initiator AT, a right of the participant AT, and an IP address of all ATs; the wireless video conference system is established.
  • the conference invitation is performed in this step. Specifically, the PCN sends a conference invitation message to each AT in the conference inviter list.
  • Step 202 After the wireless video conference system is established, the PCN receives the signaling flow of each participant AT in the wireless video conference system through the RAN, and transmits the received signaling flow to the initiator AT;
  • the PCN receives the signaling flow of the participant AT and the initiator AT through the RAN, where the signaling flow includes: a speech request instruction, a video request instruction, a data sharing request instruction, and the like;
  • the received signaling stream is transmitted to the originator AT.
  • the initiator AT parses the signaling in the received signaling flow, and sends a control instruction to the PCN according to the parsing processing result, and controls the PCN to distribute the information flow in the wireless video conference system.
  • the initiator AT receives the signaling flow sent by the PCN, and parses the signaling therein; and determines, according to the parsing result, whether the AT that sends the signaling conforms to the legality of the conference member information stored in the current wireless video conference system. And the authority; when the AT that sends the signaling conforms to the legality and authority of the conference member information stored in the current wireless video conference system, generates a control instruction according to the parsed signaling content, and sends a control command to the PCN; the PCN receives the control instruction , according to the control instructions to distribute the information flow in the wireless video conferencing system.
  • the parsing process refers to: parsing the information of the AT that sends the signaling, the content of the signaling, and the like; the control command includes: a voice permission command carrying the receiver list, and an audio that controls the PCN to distribute the audio and/or video stream. And/or video distribution instructions, data sharing instructions that control the distribution of data streams by the PCN, and the like.
  • the generating the control instruction according to the parsed signaling content specifically means: when the parsed signaling content is a speech request, generating a speech permission command carrying a receiver list; and when the parsed signaling content is a data sharing request, Then, a data sharing instruction is generated; when the parsed signaling content is a video request, a video distribution instruction carrying an AT number for transmitting a video request instruction, an AT number of the requested video, and the like are generated.
  • the controlling the distribution of the information flow in the wireless video conference system by the PCN is specifically: the PCN receives and sends the audio and/or video stream of the AT of the uttering request according to the utterance permission instruction of the initiator AT; and/or the PCN is based on the initiator AT.
  • the data sharing instructions are for distributing the data stream; and/or the PCN distributes the video stream according to the video distribution instruction of the originator AT; and/or the PCN notifies the RAN to release all UM interface radio resources according to the conference end instruction of the originator AT.
  • the processing of whether the AT that sends the signaling has the legality and the privilege belongs to the prior art, and details are not described herein again.
  • the initiator AT receives signaling and generates control commands through several examples, thereby controlling the PCN to describe the distribution of the information flow in detail.
  • the initiator AT parses the speech request command when receiving the speech request command sent by the PCN via the RAN, and the speech request command includes: sending the requested AT information, the speech request, etc., and the AT that sends the request conforms to this.
  • the receiver list of the audio and/or video stream of the AT receiving the utterance request is separated from the stored conference member list, and the spoofing of the receiver list is transmitted. The command is sent to the PCN.
  • the PCN After receiving the utterance permission command, the PCN notifies the AT of the utterance request to send the audio and/or video stream, and sends the audio and/or video stream of the AT of the utterance request according to the receiver list, and sends the AT of the utterance request command as the AT.
  • the speaker makes a speech; the speaker receives the audio and/or video stream of the initiator of the PCN distribution by default. If the speaker is also the initiator AT, the PCN will receive the participant AT of the fastest access wireless video conference system.
  • the audio and/or video stream is sent to the speaker; for example, the originator AT sends the PCN via the RAN.
  • the data sharing request instruction When the data sharing request instruction is used, the data sharing request instruction is parsed, and the data sharing request instruction includes: sending the requested AT information, the data sharing request, and the like; the AT transmitting the sharing request instruction conforms to the conference member stored in the wireless video conference system.
  • the data sharing instruction carrying the conference member list is sent to the PCN; the PCN notifies the AT sending data stream that sends the data sharing request instruction according to the data sharing instruction, and performs data according to the wireless video conference system member list therein.
  • the initiator AT parses the sending video request command, and the video request command includes: the information of the AT that sends the request, the requested AT information, the video request, and the like.
  • the video distribution instruction is sent to the PCN, where the AT number carrying the video request command and the AT number of the requested video are carried.
  • PCN notifies the AT of the requested video according to the video distribution instruction, sends the video stream to send the video request The AT of the instruction.
  • the signaling flow and the information flow in the above example can also be transmitted over the IP network between two distant PCNs, and the initiator AT centrally controls the distribution of the information flow in the wireless video conferencing system by the PCN.
  • Step 204 At the end of the conference, the conference end instruction is sent by the initiator AT, and the conference ends;
  • the initiator AT sends a conference end command to the PCN via the RAN, and the conference end instruction carries the conference member list; the PCN releases all UM interface radio resources according to the conference member list in the conference end instruction, and the initiator AT clears this time. All the saved information of the meeting, this wireless video conference ends.
  • the present invention further provides a system for implementing a wireless video conference.
  • the system includes: an initiator AT 31, a participant AT 32, and a PCN;
  • the initiator AT 31 is configured to initiate establishment of a wireless video conference system, send and receive a signaling stream and an information stream, parse and process the signaling in the received signaling stream, and send a control command to control the PCN 34 to the wireless Distribution of information streams in a video conferencing system;
  • the initiator AT 31 includes: a first information processing module 311, a terminal control module 312, and a first audio and video module 313, where
  • the first information processing module 311 is configured to send and receive the signaling flow and the information flow by using the RAN 33. Specifically, when the wireless video conference system is established, the conference request command is sent to the PCN 34 via the RAN 33, and the PCN 34 is received by the RAN 33. Transmitted PPP initialization information and assigned IP address; after the wireless video conferencing system is successfully established, sending a speech request command, a data sharing request command, a video request command, and transmitting and receiving audio and/or video streams, data streams, and the like;
  • the terminal control module 312 is configured to process the signaling flow and the information flow received by the RAN 33, and send, by the RAN 33, a control instruction for controlling the PCN 34 to distribute the information flow;
  • the receiving PCN 34 is transmitted by the RAN 33.
  • the conference member information is stored and stored; after the wireless video conference system is successfully established, it is used to receive the signaling flow of the participant AT 32 transmitted by the PCN 34 via the RAN 33, and perform parsing processing; the signaling flow includes a speech request command and data.
  • Sharing request instructions, audio and/or video request instructions, and the like, the parsing process includes: authenticating and parsing the legality and authority of the parsed request for the parsed request;
  • a control command is sent to the PCN 34 via the RAN 33, the control command comprising: a talk permission command carrying a list of recipients, an audio and/or video distribution instruction that controls the PCN 34 to distribute audio and/or video streams, A data sharing instruction for controlling the PCN 34 to distribute the data stream, and a conference end instruction for controlling the end of the conference, and the like.
  • a first audio and video module 313, configured to convert the audio and/or video stream distributed by the PCN 34 received by the first information processing module 311 into voice and/or video;
  • the initiator AT 31 further includes: a first audio and video collection module 314, a first data storage module 315;
  • the first audio and video collection module 314 is configured to collect audio and/or video data of the user, and send the audio and/or video stream to the PCN 34 under the call of the first information processing module 311;
  • the PCN 34 After the PCN 34 receives the distribution instruction of the audio and/or video of the initiator AT 31, the PCN 34 notifies the first information processing module 311 of the initiator AT 31 to call the first audio and video collection module 314 to send the audio and / or video streaming to PCN 34;
  • the first data storage module 315 is configured to send, by the first information processing module 311, the data stored by itself to the PCN 34 via the RAN 33, or store the data stream distributed by the PCN 34 received by the first information processing module 311. ;
  • the PCN 34 after the PCN 34 receives the data sharing instruction to the initiator AT, the PCN 34 notifies the first information processing module 311 of the initiator AT to call the first data storage module 315, and sends the data stored by itself to the PCN via the RAN 33. 34, or storing the data stream distributed by the PCN 34 received by the first information processing module 311;
  • the participant AT 32 may have multiples for participating in the wireless video conference, transmitting and receiving the signaling stream and the information stream, and processing the received information stream;
  • the participant AT 32 further includes: a second information processing module 321 and a second audio and video module 322; wherein
  • the second information processing module 321 is configured to send and receive the signaling flow and the information flow by using the RAN 33. Specifically, when the wireless video conference system is established, the conference invitation information is received by the RAN 33, and the instruction of participating or not participating is returned; PPP initialization information and assigned IP address transmitted by the PCN 34 through the RAN 33; after the wireless video conferencing system is successfully established, transmitting a speech request command, a data sharing request command, a video request command, and transmitting and receiving audio and/or video streams, Data stream, etc.
  • a second audio and video module 322, configured to convert the audio and/or video stream received by the second information processing module 321 to the PCN 34 into voice and/or video;
  • participant AT 32 further includes:
  • the second audio and video collection module 323 is configured to collect audio and/or video data of the user, and send the audio and/or video stream to the PCN 34 under the call of the second information processing module 321;
  • the PCN 34 after the PCN 34 receives the distribution instruction for the audio and/or video of the participant AT 32, the PCN 34 notifies the second information processing module 321 of the participant AT32 to call the second audio and video collection module 323 to send audio and/or Or video streaming to PCN 34;
  • the second data storage module 324 is configured to send, by the second information processing module 321 , the data stored by itself to the PCN 34 via the RAN 33, or store the data stream distributed by the PCN 34 received by the second information processing module 321. ;
  • the PCN 34 After the PCN 34 receives the data sharing instruction to the participant AT 32, the PCN 34 notifies the second information processing module 321 of the participant AT 32 to call the second data storage module 324 to transmit the data stored by itself to the PCN 34 via the RAN 33. Or storing the data stream distributed by the PCN 34 received by the second information processing module 321; a PCN 34, configured to receive and transmit a signaling flow and an information flow of each AT, and perform distribution of the information flow according to a control instruction of the initiator AT 31;
  • the conference request instruction for receiving the initiator AT 31 is received by the RAN 33, the initiator AT 31 is authenticated and authorized, and the radio resource and initialization are established; and according to the received
  • the conference invitee list in the conference request instruction sends a conference invitation, and receives the participation conference instruction of the participant AT 32, establishes radio resources and initialization for the participant AT, and sends the conference member list and the IP address information to the initiator AT 31;
  • the wireless video conference system After the wireless video conference system is successfully established, it is configured to receive a signaling flow sent by the AT in the wireless video conference system via the RAN 33, and send the signaling flow to the initiator AT 31 to receive the control instruction of the initiator AT 31. And distributing the information flow between the ATs according to the control instruction of the initiator AT 31, including:
  • the PCN 34 allows the instruction to receive and transmit the audio and/or video stream of the AT of the utterance request according to the utterance of the initiator AT 31; the PCN 34 distributes the data stream according to the data sharing instruction of the originator AT 31; the PCN 34 is based on the initiator AT 31
  • the video distribution instruction distributes the video stream; the PCN 34 releases all UM interface radio resources according to the conference end instruction of the initiator AT 31.
  • the apparatus further includes: a RAN 33, which is used for signaling flow and information flow in the transit system; and an IP network 35, configured to connect the wireless network to the wired network, and transmit two PCNs that are far apart in the wireless video conference. Signaling flow and information flow between.
  • a RAN 33 which is used for signaling flow and information flow in the transit system
  • an IP network 35 configured to connect the wireless network to the wired network, and transmit two PCNs that are far apart in the wireless video conference. Signaling flow and information flow between.
  • any AT can be used as the initiator AT or as the participant AT.
  • an AT in the present invention includes: an information processing module 41, a terminal control module 42, and an audio and video module 43;
  • An information processing module 41 configured to send and receive a signaling flow and an information flow
  • the conference request command is sent to the PCN by the RAN, and the PPP initialization information and points transmitted by the PCN are received by the RAN.
  • the assigned IP address after the wireless video conferencing system is successfully established, sending a speech request command, a data sharing request command, a video request command, and transmitting and receiving audio and/or video streams, data streams, etc.;
  • the conference invitation information is received by the RAN, and the instruction of participating or not participating is returned; the PPP initialization information transmitted by the PCN through the RAN and the assigned IP address are received; after the wireless video conference system is successfully established, the conference request is sent. Instructions, data sharing request instructions, video request instructions, and transmitting and receiving audio and/or video streams, data streams, etc.;
  • the terminal control module 42 is configured to: when the eNB is the initiator AT, send, by the RAN, a control instruction for controlling the PCN to distribute the information flow, and process the signaling flow and the information flow received by the RAN; jobs.
  • the wireless video conference system when the wireless video conference system is established, the conference member information transmitted by the PCN via the RAN is received and stored; after the wireless video conference system is successfully established, the participant AT for receiving the PCN via the RAN is received. a signaling flow, and performing parsing processing; the signaling flow includes a speech request instruction, a data sharing request instruction, an audio and/or video request instruction, and the like, and the parsing process includes: authenticating the parsed AT of the parsed request Identification of sexuality and authority and analysis of request information, etc.;
  • the control command is sent to the PCN via the RA, and the control command includes: a speech permission instruction carrying the recipient list, an audio and/or video distribution instruction for controlling the PCN to distribute the audio and/or video stream, and controlling the PCN distribution. a data sharing instruction of the data stream, and a conference end instruction for controlling the end of the conference;
  • the terminal control module 42 When acting as the participant AT, the terminal control module 42 does not participate in the work.
  • the audio and video module 43 is configured to convert the audio and/or video stream distributed by the PCN received by the information processing module into voice and/or video;
  • the AT further includes: an audio and video collection module 44, and a data storage module 45;
  • the audio and video collection module 44 is configured to collect audio and/or video data of itself, and send audio and/or video streams to the PCN under the call of the information processing module 41;
  • the data storage module 45 is configured to send, by the information processing module 41, the data stored by itself to the PCN via the RAN, or store the data stream distributed by the PCN received by the information processing module 41.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Engineering & Computer Science (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Telephonic Communication Services (AREA)

Abstract

本发明公开了一种无线视频会议的实现方法，包括：发起方无线接入终端（AT）发起会议请求给分组核心网（PCN），PCN根据所接收会议请求中携带的会议邀请方列表进行会议邀请，并对参加无线视频会议的各AT建立无线资源及初始化，发送参加无线视频会议的会议成员信息到发起方AT进行存储，完成无线视频会议系统的建立；无线视频会议系统建立成功后，PCN接收无线视频会议系统中的AT的信令流，并将接收到的信令流传送到发起方AT，发起方AT根据收到的信令流中的信令发送控制指令给PCN，控制PCN对无线视频会议系统中信息流的分发；本发明还同时公开了一种无线视频会议的实现系统和一种AT，采用本发明能实现多方无线视频会议。

Description

一种无线视频会议的实现方法、 系统及终端 技术领域
本发明涉及无线视频会议技术， 尤其涉及一种无线视频会议的实现方 法、 系统及终端。 背景技术
在计算机、 无线网络技术高速发展的今天， 传统的无线通讯方式如电 话、 传真等因无法达到面对面的沟通效果， 不能满足人们日益增长的交流 需求， 而日益增长的无线网络环境使视频和音频的无线传输成为可能， 一 个突出的应用就是远程无线无线视频会议。
随着无线宽带网络被广泛商用， 无线宽带网络的高速数据传输链路， 为大流量信息传输提供了保障， 无线视频功能被人们广为应用。 无线宽带 网络结构如图 1所示， 无线接入终端 （AT ) 11通过空中接口 （UM接口） 保持与无线接入网络（RAN, Residential Access Network ) 12的数据通讯； 其中 AT 11配备有摄像头、 麦克风等视频、 音频釆集设备； RAN 12通过 A 接口与分组核心网 （ PCN, Packet Core Network ) 13相连； PCN 13通过并 行互连接口 （Pi接口）与外部国际互联网协议 ( IP, Internet Protocol ) 网络 14如 Internet相连， Pi接口遵循 IS-835标准。
可以看出， AT具备釆集视频和音频数据功能， AT通过接入 RAN而连 接到 PCN, 从而接入无线宽带网络系统。 但是， 在 AT和所接入的无线宽 带网络系统中， 目前缺少对多个 AT之间信息流的控制， 包括： 音频和 /或 视频流的控制以及数据流的控制等； 而且， 现有技术中只能提供两方视频 通话， 不能提供多方视频通话功能， 进而也就不能提供多方无线视频会议 功能。 发明内容
有鉴于此， 本发明的主要目的在于提供一种无线视频会议的实现方法、 系统及终端， 能够实现多方无线视频会议。
为达到上述目的， 本发明的技术方案是这样实现的：
本发明提供了一种无线视频会议的实现方法， 该方法包括：
发起方 AT发起会议请求给 PCN, PCN根据所接收会议请求中携带的 会议邀请方列表进行会议邀请，并对参加无线视频会议的各 AT建立无线资 源及初始化， 发送参加无线视频会议的会议成员信息到发起方 AT 进行存 储， 完成无线视频会议系统的建立；
无线视频会议系统建立成功后， PCN接收无线视频会议系统中的 AT 的信令流， 并将接收到的信令流传送到发起方 AT, 发起方 AT根据收到的 信令流中的信令发送控制指令给 PCN,控制 PCN对无线视频会议系统中信 息流的分发。
其中， 所述会议请求包括： 会议邀请方列表、 自身的高优先级权限和 分配给会议邀请方列表中 AT的权限。
上述方案中， 所述对参加无线视频会议的各 AT 建立无线资源及初始 化， 具体为： PCN接收到会议请求， 对发起方 AT鉴权和授权成功后， PCN 给发起方 AT建立无线资源，发送点对点协议 ( PPP, Point to Point Protocol ) 初始化信息给发起方 AT, 并给发起方 AT分配 IP地址； PCN在收到参加方 AT返回的参加会议指令时， PCN给该参加方 AT建立无线资源、 发送 PPP 初始化信息 , 并分配 IP地址。
上述方案中， 所述会议成员信息具体为： 会议成员列表、 发起方 AT的 高优先级权限和参加无线视频会议的参加方 AT的权限、 以及所有 AT的 IP 地址。
上述方案中， 所述 PCN接收无线视频会议系统中的 AT的信令流具体 为： PCN通过 RAN接收参加方 AT和发起方 AT的信令流， 其中， 所述信 令流包括： 发言请求指令、 视频请求指令、 数据共享请求指令。
上述方案中，所述发起方 AT根据接收到的信令流中的信令发送控制指 令给 PCN具体为： 发起方 AT接收到 PCN发来的信令流， 对其中的信令进 行解析处理， 并根据解析处理的结果发送控制指令给 PCN。
上述方案中， 所述控制 PCN对无线视频会议系统中信息流的分发为： PCN根据发起方 AT的发言允许指令接收和发送发言请求的 AT的音频和 / 或视频流； 和 /或， PCN根据发起方 AT的数据共享指令进行分发数据流； 和 /或， PCN根据发起方 AT的视频分发指令分发视频流； 和 /或， PCN根据 发起方 AT的会议结束指令释放所有 UM接口无线资源。
本发明还提供了一种无线视频会议的实现系统， 该系统包括： 发起方 AT, 用于发起会议请求， 发送和接收信令流和信息流， 并对接 收到的信令流中的信令进行解析处理， 发送控制指令， 控制 PCN对无线视 频会议系统中信, 流的分发；
参加方 AT, 用于参加无线视频会议， 发送和接收信令流和信息流， 并 对接收到的信息流的处理；
PCN, 用于根据所接收会议请求中携带的会议邀请方列表进行会议邀 请， 并对参加无线视频会议的各 AT建立无线资源及初始化； 同时用于接收 和发送各 AT的信令流和信息流， 并根据发起方 AT的控制指令进行信息流 的分发。
上述方案中， 该系统进一步包括： RAN, 用于中转系统中的信令流和 信息流。
上述方案中， 所述发起方 AT进一步包括：
第一信息处理模块， 用于通过 RAN发送和接收信令流和信息流； 终端控制模块， 用于对经 RAN接收到的信令流和信息流进行处理， 并 经 RAN发送控制 PCN分发信息流的控制指令；
第一音视频模块， 用于将第一信息处理模块接收到 PCN分发的音频和 /或视频流转换成语音和 /或视频；
上述方案中， 所述发起方 AT还包括：
第一音视频釆集模块， 用于釆集自身的音频和 /或视频数据， 在第一信 息处理模块的调用下， 发送音频和 /或视频流到 PCN;
第一数据存储模块， 用于在第一信息处理模块的调用下， 将自身存储 的数据经 RAN发送到 PCN, 或者存储第一信息处理模块接收的 PCN分发 下来的数据流。
上述方案中， 所述参加方 AT进一步包括：
第二信息处理模块， 用于通过 RAN发送和接收信令流和信息流； 第二音视频模块， 用于将第二信息处理模块接收到 PCN分发的音频和 /或视频流转换成语音和 /或视频。
上述方案中， 所述参加方 AT还包括：
第二音频和视频釆集模块， 用于釆集自身的音频和视频数据， 在第二 信息处理模块的调用下， 发送音频和视频流到 PCN;
第二数据存储模块， 用于在第二信息处理模块的调用下， 将自身存储 的数据经 RAN发送到 PCN, 或者存储第二信息处理模块接收的 PCN分发 下来的数据流。
本发明还提供了一种 AT, 该 AT包括：
信息处理模块， 用于发送和接收信令流和信息流；
终端控制模块， 用于在作为发起方 AT时， 发送控制 PCN分发信息流 的控制指令， 并对接收到的信令流和信息流进行处理；
音视频模块，用于将信息处理模块接收到的 PCN分发的音频和 /或视频 流转换成语音和 /或视频。 其中， 该 AT进一步包括：
音视频釆集模块， 用于采集自身的音频和 /或视频数据， 在信息处理模 块的调用下， 发送音频和 /或视频流到 PCN;
数据存储模块， 用于在信息处理模块的调用下， 将自身存储的数据经 RAN发送到 PCN, 或者存储信息处理模块接收的 PCN分发下来的数据流。
本发明提供的一种无线视频会议的实现方法、 系统及终端， 通过将无 线视频会议系统中的信令发送到发起方 AT, 由发起方 AT根据接收到的信 令产生控制指令， 将控制指令发送给 PCN, PCN根据控制指令进行无线视 频会议系统中信息流的分发，使无线视频会议系统中各 AT可以通过发送信 令， 得到所需要的信息流， 从而实现多方无线视频会议。
另外， 本发明由发起方 AT控制整个无线视频会议系统的建立、 以及无 线视频会议实现过程中信息流的分发， 如此， 可在实现多方无线视频会议 的同时， 保证统一的无线视频会议控制， 使无线视频会议的实现更安全、 可靠、 有效。 附图说明
图 1为无线宽带系统网络架构示意图；
图 2为本发明实现一种无线视频会议方法的流程示意图；
图 3为本发明实现一种无线视频会议系统的结构示意图；
图 4为本发明提供的一种 AT的结构示意图。 具体实施方式
本发明的基本思想是： 由发起方 AT作为信息流控制方， 产生控制指令 发送给 PCN , PCN再根据控制指令完成无线视频会议系统中信息流的分发。
下面结合附图及具体实施例对本发明进行详细说明。
本发明一种无线视频会议的实现方法如图 2所示， 包括以下步骤： 步骤 201： 发起方 AT经由 RAN发送会议请求给 PCN, PCN接收到会 议请求， 根据其中携带的会议邀请方列表进行会议邀请， 并对参加无线视 频会议的各 AT建立无线资源， 完成无线视频会议系统的建立；
通常，在 UM接口与 RAN连接的多个 AT中，针对某次无线视频会议， 会有某个 AT作为发起方 AT。那么，本步骤具体为： 由发起方 AT经由 RAN 向 PCN发送会议请求， 该会议请求中包括： 会议邀请方列表、 自身的高优 先级权限和分配给会议邀请方列表中 AT的权限等信息； RAN接收到会议 请求后会传给 PCN, PCN接收到会议请求后， 对发起方 AT鉴权和授权； 鉴权和授权成功后， PCN给发起方 AT建立无线资源， 发送 PPP初始化信 息给发起方 AT, 并给发起方 AT分配 IP地址； 同时， PCN按照会议请求中 的会议邀请方列表通过 RAN发送会议邀请， 接收到会议邀请的 AT返回参 加或不参加会议指令；
在 PCN收到参加会议指令时， PCN给该参加方 AT建立无线资源， 发 送 PPP初始化信息， 并分配 IP地址； 所有参加方 AT的无线资源建立成功 后， PCN将会议成员信息经 RAN发送到发起方 AT进行存储， 包括： 会议 成员列表、 发起方 AT的高优先级权限和参加方 AT的权限、 以及所有 AT 的 IP地址等信息； 无线视频会议系统建立完成。
本步骤中所述进行会议邀请具体是： PCN向会议邀请方列表中的各 AT 发送会议邀请消息。
步骤 202: 无线视频会议系统建立完成后， PCN通过 RAN接收无线视 频会议系统中各参加方 AT 的信令流， 并将接收到的信令流传送到发起方 AT;
具体的，在无线视频会议系统建立成功后， PCN通过 RAN接收参加方 AT和发起方 AT的信令流， 所述信令流包括： 发言请求指令、 视频请求指 令、 数据共享请求指令等； PCN将接收到的信令流传送到发起方 AT。 步骤 203: 发起方 AT对接收到的信令流中的信令进行解析处理， 并根 据解析处理结果发送控制指令给 PCN,控制 PCN对无线视频会议系统中信 息流的分发；
具体的， 发起方 AT接收到 PCN发来的信令流， 对其中的信令进行解 析处理；根据解析结果对发送信令的 AT判断是否符合当前无线视频会议系 统存储的会议成员信息的合法性和权限；在发送信令的 AT符合当前无线视 频会议系统存储的会议成员信息的合法性和权限时， 根据解析出的信令内 容产生控制指令， 并发送控制指令给 PCN; PCN接收到控制指令， 按照控 制指令对无线视频会议系统中信息流进行分发。
其中， 所述解析处理是指： 解析出发送信令的 AT的信息、 信令的内容 等； 所述控制指令包括： 携带接收方列表的发言允许指令、 控制 PCN分发 音频和 /或视频流的音频和 /或视频分发指令、 控制 PCN分发数据流的数据 共享指令等等。
所述根据解析出的信令内容产生控制指令具体是指： 解析出的信令内 容为发言请求时， 则产生携带接收方列表的发言允许指令； 解析出的信令 内容为数据共享请求时， 则产生数据共享指令； 解析出的信令内容为视频 请求时， 则产生携带发送视频请求指令的 AT号码、 和被请求视频的 AT号 码的视频分发指令等等。
所述控制 PCN对无线视频会议系统中信息流的分发具体为： PCN根据 发起方 AT的发言允许指令接收和发送发言请求的 AT的音频和 /或视频流； 和 /或 PCN根据发起方 AT的数据共享指令进行分发数据流； 和 /或 PCN根 据发起方 AT的视频分发指令分发视频流； 和 /或 PCN根据发起方 AT的会 议结束指令通知 RAN释放所有 UM接口无线资源。
这里， 发送信令的 AT是否具备合法性和权限的处理属于已有技术， 在 此不再赘述。 下面通过几个例子对发起方 AT 接收信令并产生控制指令， 从而控制 PCN对信息流的分发进行详细说明。
比如，发起方 AT在接收到 PCN经 RAN发来的发言请求指令时，对发 言请求指令进行解析处理， 发言请求指令包含： 发送请求的 AT的信息、 发 言请求等，在发送请求的 AT符合此无线视频会议系统存储的会议成员信息 的合法性和权限时，从存储的会议成员列表中分出接收发言请求的 AT的音 频和 /或视频流的接收方列表，发送携带接收方列表的发言允许指令给 PCN, PCN接收到发言允许指令后， 通知发言请求的 AT发送音频和 /或视频流， 并按照接收方列表发送发言请求的 AT 的音频和 /或视频流， 发送发言请求 指令的 AT作为发言方进行发言； 发言方默认接收 PCN分发的发起方的音 频和 /或视频流， 如果发言方同时也为发起方 AT, 则 PCN将接收到的最快 接入无线视频会议系统的参加方 AT的音频和 /或视频流发送给发言方； 又如， 发起方 AT在接收到 PCN经 RAN发来的数据共享请求指令时， 对数据共享请求指令进行解析处理， 数据共享请求指令包含： 发送请求的 AT的信息、 数据共享请求等； 在发送共享请求指令的 AT符合此无线视频 会议系统存储的会议成员信息的合法性和权限时， 发送携带会议成员列表 的数据共享指令给 PCN; PCN根据数据共享指令， 通知发送数据共享请求 指令的 AT发送数据流，并按照其中的无线视频会议系统成员列表进行数据 流分发；
再如，发起方 AT在接收到 PCN经 RAN发来的视频请求指令时，对发 送视频请求指令进行解析处理，视频请求指令包含：发送请求的 AT的信息、 被请求的 AT信息和视频请求等； 在发送视频请求指令的 AT符合此无线视 频会议系统存储的会议成员信息的合法性和权限时， 发送视频分发指令给 PCN, 其中携带发送视频请求指令的 AT号码、 和被请求视频的 AT号码； PCN根据视频分发指令通知被请求视频的 AT,发送视频流到发送视频请求 指令的 AT。
上述例子中的信令流和信息流也可以在相距遥远的两个 PCN之间通过 IP网络传送， 由发起方 AT集中控制 PCN对无线视频会议系统中信息流的 分发。
步骤 204: 在会议结束时， 通过发起方 AT发送会议结束指令， 结束会 议；
在会议结束时， 发起方 AT经由 RAN发送会议结束指令给 PCN, 会议 结束指令中携带会议成员列表； PCN根据会议结束指令中的会议成员列表， 释放所有 UM接口无线资源，发起方 AT清除本次会议的所有保存信息，本 次无线视频会议结束。
为实现上述方法， 本发明还提出一种无线视频会议的实现系统， 如图 3 所示， 该系统包括： 发起方 AT 31、 参加方 AT 32、 PCN; 其中，
发起方 AT 31 , 用于发起无线视频会议系统的建立，发送和接收信令流 和信息流， 并对接收到的信令流中的信令进行解析处理， 发送控制指令， 控制 PCN 34对无线视频会议系统中的信息流的分发；
进一步的， 发起方 AT 31包括： 第一信息处理模块 311、 终端控制模块 312、 第一音视频模块 313 , 其中，
第一信息处理模块 311 ,用于通过 RAN 33发送和接收信令流和信息流； 具体的：在建立无线视频会议系统时，经 RAN 33发送会议请求指令给 PCN 34, 经 RAN 33接收 PCN 34传送的 PPP初始化信息和分配的 IP地址； 在 无线视频会议系统建立成功后， 发送发言请求指令、 数据共享请求指令、 视频请求指令， 以及发送和接收音频和 /或视频流、 数据流等；
终端控制模块 312,用于对经 RAN 33接收到的信令流和信息流进行处 理， 并经 RAN 33发送控制 PCN 34分发信息流的控制指令；
具体的， 在建立无线视频会议系统时， 接收 PCN 34经 RAN 33传送的 会议成员信息并存储； 在无线视频会议系统建立成功后， 用于接收 PCN 34 经 RAN 33传送的参加方 AT 32的信令流， 并进行解析处理； 所述信令流包 括发言请求指令、 数据共享请求指令、 音频和 /或视频请求指令等， 所述解 析处理包括：对解析出的发送请求的 AT的合法性和权限的鉴定和解析出其 中的请求信息等；
根据解析处理的结果， 经 RAN 33发送控制指令到 PCN 34, 所述控制 指令包括： 携带接收方列表的发言允许指令、 控制 PCN 34分发音频和 /或 视频流的音频和 /或视频分发指令、 控制 PCN 34分发数据流的数据共享指 令、 以及控制结束会议的会议结束指令等。
第一音视频模块 313 , 用于将第一信息处理模块 311接收到的 PCN 34 分发的音频和 /或视频流转换成语音和 /或视频；
进一步的， 发起方 AT 31还包括： 第一音视频釆集模块 314、 第一数据 存储模块 315; 其中，
第一音视频釆集模块 314, 用于釆集自身的音频和 /或视频数据， 在第 一信息处理模块 311的调用下发送音频和 /或视频流到 PCN 34;
具体的，在 PCN34收到对发起方 AT 31的音频和 /或视频的分发指令后， PCN 34通知发起方 AT 31的第一信息处理模块 311调用第一音视频釆集模 块 314, 发送音频和 /或视频流到 PCN 34;
第一数据存储模块 315, 用于在第一信息处理模块 311的调用下， 将自 身存储的数据经 RAN 33 发送到 PCN 34, 或者存储第一信息处理模块 311 接收的 PCN 34分发下来的数据流；
具体的，在 PCN 34收到对发起方 AT的数据共享指令后， PCN 34通知 发起方 AT的第一信息处理模块 311调用第一数据存储模块 315, 将自身存 储的数据经 RAN 33 发送到 PCN 34, 或者存储第一信息处理模块 311接收 的 PCN 34分发下来的数据流； 参加方 AT 32, 可以有多个， 用于参加无线视频会议， 发送和接收信令 流和信息流， 以及对接收到的信息流的处理；
参加方 AT 32进一步包括： 第二信息处理模块 321、 第二音视频模块 322; 其中，
第二信息处理模块 321 ,用于通过 RAN 33发送和接收信令流和信息流； 具体的， 在建立无线视频会议系统时， 通过 RAN 33接收会议邀请信息， 并 返回参加或不参加的指令；接收 PCN 34通过 RAN 33传送的 PPP初始化信 息和分配的 IP地址； 在无线视频会议系统建立成功后，发送发言请求指令、 数据共享请求指令、 视频请求指令， 以及发送和接收音频和 /或视频流、 数 据流等；
第二音视频模块 322 , 用于将第二信息处理模块 321接收到 PCN 34分 发的音频和 /或视频流转换成语音和 /或视频；
进一步的， 参加方 AT 32还包括：
第二音视频釆集模块 323 , 用于釆集自身的音频和 /或视频数据， 在第 二信息处理模块 321的调用下发送音频和 /或视频流到 PCN 34;
具体的， 在 PCN 34收到对参加方 AT 32的音频和 /或视频的分发指令 后， PCN 34通知参加方 AT32的第二信息处理模块 321调用第二音视频采 集模块 323 , 发送音频和 /或视频流到 PCN 34;
第二数据存储模块 324, 用于在第二信息处理模块 321的调用下， 将自 身存储的数据经 RAN 33发送到 PCN 34, 或者存储第二信息处理模块 321 接收的 PCN 34分发下来的数据流；
在 PCN 34收到对参加方 AT 32的数据共享指令后， PCN 34通知参加 方 AT 32的第二信息处理模块 321调用第二数据存储模块 324,将自身存储 的数据经 RAN 33发送到 PCN 34 , 或者存储第二信息处理模块 321接收的 PCN 34分发下来的数据流； PCN 34,用于接收和发送各 AT的信令流和信息流，并根据发起方 AT 31 的控制指令进行信息流的分发；
具体的，在建立无线视频会议系统时，用于通过 RAN 33接收到发起方 AT 31的会议请求指令， 对发起方 AT 31进行鉴权和授权， 并建立无线资源 和初始化； 以及按照接收到的会议请求指令中的会议邀请方列表发送会议 邀请， 并接收参加方 AT 32的参加会议指令， 给参加方 AT建立无线资源和 初始化， 发送会议成员列表和 IP地址信息到发起方 AT 31；
在无线视频会议系统建立成功后， 用于接收无线视频会议系统中的 AT 经 RAN 33发来的信令流， 并将信令流发送给发起方 AT 31 , 接收发起方 AT 31的控制指令， 并按照发起方 AT 31的控制指令进行各 AT间信息流的 分发， 包括：
PCN 34根据发起方 AT 31的发言允许指令接收和发送发言请求的 AT 的音频和 /或视频流； PCN 34根据发起方 AT 31的数据共享指令进行分发数 据流； PCN 34根据发起方 AT 31的视频分发指令分发视频流； PCN 34根据 发起方 AT 31的会议结束指令释放所有 UM接口无线资源。
进一步的该装置还包括： RAN 33 ,用于中转系统中的信令流和信息流； IP网络 35 , 用于实现无线网络与有线网络的连接， 在无线视频会议中 传输相距遥远的两个 PCN之间的信令流和信息流。
需要说明的是： 在实际应用中， 任何一个 AT都可以作为发起方 AT, 或作为参加方 AT。
基于上述系统， 本发明中的一种 AT, 如图 4所示， 该 AT包括： 信息 处理模块 41、 终端控制模块 42、 音视频模块 43; 其中，
信息处理模块 41， 用于发送和接收信令流和信息流；
具体的： 在作为发起方 AT时， 在建立无线视频会议系统时， 经 RAN 发送会议请求指令给 PCN, 经 RAN接收 PCN传送的 PPP初始化信息和分 配的 IP地址； 在无线视频会议系统建立成功后， 发送发言请求指令、 数据 共享请求指令、 视频请求指令， 以及发送和接收音频和 /或视频流、 数据流 等； 在作为参加方 AT时， 在建立无线视频会议系统时， 通过 RAN接收会 议邀请信息，并返回参加或不参加的指令；接收 PCN通过 RAN传送的 PPP 初始化信息和分配的 IP地址； 在无线视频会议系统建立成功后， 发送发言 请求指令、 数据共享请求指令、 视频请求指令， 以及发送和接收音频和 /或 视频流、 数据流等；
终端控制模块 42, 用于在作为发起方 AT时， 经 RAN发送控制 PCN 分发信息流的控制指令， 并对经 RAN接收到的信令流和信息流进行处理； 在作为参加方 AT时， 不参加工作。
具体的， 在作为发起方 AT时，在建立无线视频会议系统时，接收 PCN 经 RAN传送的会议成员信息并存储； 在无线视频会议系统建立成功后， 用 于接收 PCN经 RAN传送的参加方 AT的信令流， 并进行解析处理； 所述信 令流包括发言请求指令、 数据共享请求指令、 音频和 /或视频请求指令等， 所述解析处理包括：对解析出的发送请求的 AT的合法性和权限的鉴定及解 析出其中的请求信息等；
根据解析处理的结果， 经 RA 发送控制指令到 PCN, 所述控制指令包 括： 携带接收方列表的发言允许指令、控制 PCN分发音频和 /或视频流的音 频和 /或视频分发指令、控制 PCN分发数据流的数据共享指令、 以及控制结 束会议的会议结束指令等；
在作为参加方 AT时， 终端控制模块 42不参加工作。
音视频模块 43 , 用于将信息处理模块接收到的 PCN分发的音频和 /或 视频流转换成语音和 /或视频；
进一步的， 该 AT还包括： 音视频釆集模块 44、 数据存储模块 45; 其 中， 音视频釆集模块 44, 用于釆集自身的音频和 /或视频数据， 在信息处理 模块 41的调用下发送音频和 /或视频流到 PCN;
数据存储模块 45, 用于在信息处理模块 41的调用下， 将自身存储的数 据经 RAN发送到 PCN,或者存储信息处理模块 41接收的 PCN分发下来的 数据流。
以上所述， 仅为本发明的较佳实施例， 并非用于限定本发明的保护范 围， 凡在本发明的精神和原则之内所作的任何修改、 等同替换和改进等， 均应包含在本发明的保护范围之内。

Claims

权利要求书
1、 一种无线视频会议的实现方法， 其特征在于， 该方法包括： 发起方无线接入终端（AT )发起会议请求给分组核心网 （PCN ), PCN 根据所接收会议请求中携带的会议邀请方列表进行会议邀请， 并对参加无 线视频会议的各 AT建立无线资源及初始化，发送参加无线视频会议的会议 成员信息到发起方 AT进行存储， 完成无线视频会议系统的建立；
无线视频会议系统建立成功后， PCN接收无线视频会议系统中的 AT 的信令流， 并将接收到的信令流传送到发起方 AT, 发起方 AT根据收到的 信令流中的信令发送控制指令给 PCN,控制 PCN对无线视频会议系统中信 息流的分发。
2、 根据权利要求 1所述的方法， 其特征在于， 所述会议请求包括： 会 议邀请方列表、 自身的高优先级权限和分配给会议邀请方列表中 AT 的权 限。
3、 根据权利要求 1所述的方法， 其特征在于， 所述对参加无线视频会 议的各 AT建立无线资源及初始化， 具体为：
PCN接收到会议请求， 对发起方 AT鉴权和授权成功后， PCN给发起 方 AT建立无线资源， 发送点对点协议（ PPP )初始化信息给发起方 AT, 并 给发起方 AT分配国际互联网协议（ IP )地址； PCN在收到参加方 AT返回 的参加会议指令时， PCN给参加方 AT建立无线资源、 发送 PPP初始化信 息， 并分配 IP地址。
4、 根据权利要求 1所述的方法， 其特征在于， 所述会议成员信息具体 为： 会议成员列表、发起方 AT的高优先级权限和参加无线视频会议的参加 方 AT的权限、 以及所有 AT的 IP地址。
5、 根据权利要求 1所述的方法， 其特征在于， 所述 PCN接收无线视 频会议系统中的 AT的信令流具体为： PCN通过无线接入网络（RAN )接 收参加方 AT和发起方 AT的信令流， 其中， 所述信令流包括： 发言请求指 令、 视频请求指令、 数据共享请求指令。
6、 根据权利要求 1所述的方法， 其特征在于， 所述发起方 AT根据接 收到的信令流中的信令发送控制指令给 PCN具体为：发起方 AT接收到 PCN 发来的信令流， 对其中的信令进行解析处理， 并根据解析处理的结果发送 控制指令给 PCN。
7、 根据权利要求 1所述的方法， 其特征在于， 所述控制 PCN对无线 视频会议系统中信息流的分发为： PCN根据发起方 AT的发言允许指令接 收和发送发言请求的 AT的音频和 /或视频流； 和 /或，
PCN根据发起方 AT的数据共享指令进行分发数据流； 和 /或，
PCN根据发起方 AT的视频分发指令分发视频流； 和 /或，
PCN根据发起方 AT的会议结束指令释放所有 UM接口无线资源。
8、 一种无线视频会议的实现系统， 其特征在于， 该系统包括： 发起方 AT, 用于发起会议请求， 发送和接收信令流和信息流， 并对接 收到的信令流中的信令进行解析处理， 发送控制指令， 控制 PCN对无线视 频会议系统中信息流的分发；
参加方 AT, 用于参加无线视频会议， 发送和接收信令流和信息流， 并 对接收到的信息流的处理；
PCN, 用于根据所接收会议请求中携带的会议邀请方列表进行会议邀 请， 并对参加无线视频会议的各 AT建立无线资源及初始化； 同时用于接收 和发送各 AT的信令流和信息流， 并根据发起方 AT的控制指令进行信息流 的分发。
9、 根据权利要求 8所述的系统， 其特征在于， 该系统进一步包括： RAN, 用于中转系统中的信令流和信息流。
10、 根据权利要求 9所述的系统， 其特征在于， 所述发起方 AT进一步 包括：
第一信息处理模块， 用于通过 RAN发送和接收信令流和信息流； 终端控制模块， 用于对经 RAN接收到的信令流和信息流进行处理， 并 经 RAN发送控制 PCN分发信息流的控制指令；
第一音视频模块， 用于将第一信息处理模块接收到 PCN分发的音频和 /或视频流转换成语音和 /或视频；
所述发起方 AT还包括：
第一音视频釆集模块， 用于釆集自身的音频和 /或视频数据， 在第一信 息处理模块的调用下， 发送音频和 /或视频流到 PCN;
第一数据存储模块， 用于在第一信息处理模块的调用下， 将自身存储 的数据经 RAN发送到 PCN, 或者存储第一信息处理模块接收的 PCN分发 下来的数据流。
11、 根据权利要求 10所述的系统， 其特征在于， 所述参加方 AT进一 步包括：
第二信息处理模块， 用于通过 RAN发送和接收信令流和信息流； 第二音视频模块， 用于将第二信息处理模块接收到 PCN分发的音频和 /或视频流转换成语音和 /或视频。
12、 根据权利要求 10所述的系统， 其特征在于， 所述参加方 AT还包 括：
第二音频和视频釆集模块， 用于釆集自身的音频和视频数据， 在第二 信息处理模块的调用下， 发送音频和视频流到 PCN;
第二数据存储模块， 用于在第二信息处理模块的调用下， 将自身存储 的数据经 RAN发送到 PCN, 或者存储第二信息处理模块接收的 PCN分发 下来的数据流。
13、 一种 AT, 其特征在于， 该 AT包括： 信息处理模块， 用于发送和接收信令流和信息流；
终端控制模块， 用于在作为发起方 AT时， 发送控制 PCN分发信息流 的控制指令， 并对接收到的信令流和信息流进行处理；
音视频模块，用于将信息处理模块接收到的 PCN分发的音频和 /或视频 流转换成语音和 /或视频。
14、 根据权利要求 13所述的 AT, 其特征在于， 该 AT进一步包括： 音视频釆集模块， 用于釆集自身的音频和 /或视频数据， 在信息处理模 块的调用下， 发送音频和 /或视频流到 PCN;
数据存储模块， 用于在信息处理模块的调用下， 将自身存储的数据经 RAN发送到 PCN, 或者存储信息处理模块接收的 PCN分发下来的数据流。
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