WO2012000364A1 - Procédé et système de mise en œuvre d'intercommunication de signalisation intersegment dans un système de visioconférence - Google Patents

Procédé et système de mise en œuvre d'intercommunication de signalisation intersegment dans un système de visioconférence Download PDF

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Publication number
WO2012000364A1
WO2012000364A1 PCT/CN2011/074993 CN2011074993W WO2012000364A1 WO 2012000364 A1 WO2012000364 A1 WO 2012000364A1 CN 2011074993 W CN2011074993 W CN 2011074993W WO 2012000364 A1 WO2012000364 A1 WO 2012000364A1
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WO
WIPO (PCT)
Prior art keywords
terminal
ras
message
registration
gatekeeper
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Application number
PCT/CN2011/074993
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English (en)
Chinese (zh)
Inventor
李峰
杨扬
包明辉
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中兴通讯股份有限公司
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Publication of WO2012000364A1 publication Critical patent/WO2012000364A1/fr

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    • 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

Definitions

  • the present invention relates to the field of conference television technology, and in particular, to a method and system for implementing inter-network segment signaling interworking of a conference television system. Background technique
  • the conference television system refers to a communication technology that uses television and special equipment to connect conference rooms in two or more places through communication and computer networks, and to hold real-time, two-way and interactive visual conferences by television.
  • the conference television system can connect multiple independent subnets and allow terminals in these subnets to join the same conference. Since each subnet belongs to a different network, the subnets cannot communicate with each other. Therefore, how to ensure each subnet can be ensured.
  • the technical problem to be solved by the present invention is to provide a method and system for implementing inter-network segment signaling intercommunication of a conference television system, which is used to implement interworking of RAS signaling between a terminal and a gatekeeper in different network segments.
  • the present invention provides a method for implementing inter-network segment signaling interworking of a conference television system, the method comprising:
  • the terminal registers with the registration, access authentication, and status query (RAS) proxy.
  • RAS registration, access authentication, and status query
  • the RAS proxy After receiving the RAS signaling message initiated by the terminal, the RAS proxy establishes a mapping between the serial number in the RAS signaling message and the source IP address and port of the terminal. Relationship, and forward the RAS signaling message to the gatekeeper;
  • the RAS proxy After receiving the RAS response message of the gatekeeper reply, the RAS proxy sends the RAS response message to the corresponding terminal according to the established mapping relationship.
  • the RAS signaling message initiated by the terminal includes: a registration request, a call request, a cancellation registration request, a deletion terminal request or a state keep-alive request.
  • the method package includes:
  • the RAS proxy When receiving the registration request message of the terminal, the RAS proxy replaces the first serial number in the registration request message with the second serial number, and then forwards the registration request message to the gatekeeper; and the first serial number is The second sequence number and the mapping relationship between the source IP address and the port of the terminal are recorded in the forwarding mapping table;
  • the RAS agent When receiving the registration confirmation or registration rejection message of the gatekeeper reply, the RAS agent searches for the forwarding mapping table according to the second serial number in the registration confirmation or registration rejection message, and restores the second serial number to After the first serial number, the registration confirmation or registration rejection message is forwarded to the corresponding terminal according to the IP address and port corresponding to the found second serial number.
  • the method further includes:
  • the terminal list is created or updated according to the port identifier, source IP address, and port of the terminal in the registration confirmation or registration rejection message, and the terminal list is used for saving.
  • the RAS proxy searches the terminal list according to the terminal identifier in the RAS signaling message, and according to the found The IP address and port corresponding to the terminal identifier forward the RAS signaling message to the corresponding terminal.
  • the method further includes:
  • the RAS agent After receiving the registration request message sent by the terminal, the RAS agent deletes the terminal of the terminal in the terminal list if the registration request message or the state keep-alive request message of the terminal is not received within a predetermined length of time. Identification, source IP address and port.
  • the RAS signaling message initiated by the gatekeeper includes: a deletion request, a status request; and the gatekeeper carries the terminal identifier in the initiated status request message when the status request message is initiated.
  • the invention also provides a system for realizing inter-network segment signaling intercommunication of a conference television system, the system comprising: a gatekeeper and a RAS agent,
  • the RAS proxy is configured to: after receiving the RAS signaling message initiated by the terminal, establish a mapping relationship between the sequence number in the RAS signaling message and the source IP address and port of the terminal, and forward the RAS signaling message to Gatekeeper; and, after receiving the RAS response message from the gatekeeper, according to the establishment The mapping relationship sends the RAS response message to a corresponding terminal;
  • the gatekeeper is configured to: after receiving the RAS signaling message sent by the RAS proxy, replying to the RAS response message.
  • the terminal initiated RAS signaling message includes a registration request message
  • the RAS proxy is configured to: when receiving the registration request message of the terminal, after replacing the first serial number in the registration request message with the second serial number, forwarding the registration request message to the gatekeeper; The mapping relationship between the first serial number, the second serial number, and the source IP address and the port of the terminal is recorded in the forwarding mapping table; and when the registration confirmation or registration rejection message of the gatekeeper reply is received, according to the registration confirmation Or searching for the forwarding mapping table by using the second serial number in the registration rejection message, and after the second serial number is restored to the first serial number, the registration confirmation or registration rejection message is based on the found second The IP address and port corresponding to the serial number are forwarded to the corresponding terminal.
  • the RAS proxy is further configured to: when receiving the registration confirmation or registration rejection message, create or update a terminal list according to a terminal identifier, a source IP address, and a port of the terminal in the registration confirmation message, where the terminal The list stores the terminal identifier of the terminal, the source IP address, and the corresponding relationship of the port.
  • the terminal When receiving the RAS signaling message initiated by the gatekeeper, the terminal searches the terminal list according to the terminal identifier in the RAS signaling message, and correspondingly searches according to the found terminal identifier. IP address and port forward the RAS signaling message to the corresponding terminal;
  • the RAS signaling message initiated by the gatekeeper includes: a deletion request, a status request, and the gatekeeper is further configured to: carry the terminal identifier in the message that initiates the status request.
  • the RAS proxy is further configured to: after receiving the registration request message sent by the terminal, if the registration request message or the state keep-alive request message of the terminal is not received within a predetermined length of time, deleting the The terminal ID, source IP address, and port of the terminal in the terminal list.
  • FIG. 1 is a schematic diagram of networking for implementing RAS signaling inter-network segment interworking according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of RAS signaling interaction between modules according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of signaling forwarding implemented by a RAS proxy in a scenario in which an RRQ is sent by a terminal according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of signaling forwarding implemented by a RAS proxy in a scenario in which a gatekeeper sends a DRQ according to an embodiment of the present invention.
  • the present invention provides a scheme for inter-network segment signaling interworking of a conference television system, and the basic structure thereof is as follows:
  • the RAS signaling between the terminal and the gatekeeper passes through the transmission mechanism of the RAS proxy, which specifically involves the following two aspects:
  • the gatekeeper passively sends RAS signaling
  • the terminal first sends a registration request (RRQ) message to the gatekeeper, and the gatekeeper replies to the terminal registration confirmation (Registration) Confirm, RCF) or the case of the registration reject (RRJ) message
  • the other is the RAS signaling initiated by the gatekeeper, such as the hang-up terminal registration that the gatekeeper actively sends to the terminal. Instructs the message terminal to delete the request (Disengage Request, DRQ).
  • RAS signaling is based on the User Datagram Protocol (UDP) question and answer, that is, the terminal sends a request, and then the gatekeeper answers the request, for example, RRQ (Q) corresponds to RCF (A);
  • the RAS signaling contains a sequence number (sqNum) field. Therefore, the sqNum can be used as an index to establish a correspondence between the RAS message and the identifier or IP address of the corresponding terminal, thereby completing the request ⁇ -> response flow between the terminal and the gatekeeper.
  • the present invention provides a method for implementing inter-network segment signaling interworking of a conference television system. After the terminal registers with the RAS proxy, the method includes:
  • the RAS proxy When receiving the RAS signaling message initiated by the terminal, the RAS proxy establishes a mapping relationship between the sequence number in the RAS signaling message and the source IP address and port of the terminal, and forwards the RAS signaling message to the gatekeeper;
  • the RAS proxy After receiving the RAS response message of the gatekeeper reply, the RAS proxy sends the RAS response message to the corresponding terminal according to the established mapping relationship.
  • the RAS signaling message initiated by the terminal includes: a registration request (RRQ), a call request (ARQ), a deregistration request (URQ), a delete terminal request (DRQ), or a state keepalive request (IRR).
  • RRQ registration request
  • ARQ call request
  • URQ deregistration request
  • DRQ delete terminal request
  • IRR state keepalive request
  • the RAS proxy specifically implements the interworking processing of the RAS signaling across the network segment as follows:
  • the RAS proxy When the RAS proxy receives the RRQ message of the terminal, it generates a new sqNum, and replaces the original sqNum (hereinafter also referred to as the first sqNum) in the RRQ message with the generated new sqNum (hereinafter also referred to as the second sqNum). After the RRQ message is forwarded to the gatekeeper; and the mapping relationship between the first sqNum, the second sqNum, and the source IP address and port of the terminal is recorded in the forwarding mapping table;
  • the RAS proxy When receiving the RCF or RRJ message of the gatekeeper reply, the RAS proxy searches the forwarding map according to the second sqNum in the RCF or RRJ message, and restores the second sqNum in the RCF or RRJ message to the first sqNum. And forwarding the RCF or RRJ message to the corresponding terminal according to the found IP address and port corresponding to the second sqNum.
  • the content saved in the forwarding mapping table in the present invention includes the original sqNum, new sqNum, IP address and port.
  • the RAS agent determines whether the IP address and the terminal identifier of the terminal have been recorded, and if not, saves the IP address and the terminal identifier of the terminal in the terminal list;
  • the RAS agent When receiving the RAS signaling message (such as a DRQ message, an IRQ message, etc.) initiated by the gatekeeper, the RAS agent searches the terminal list according to the terminal identifier in the RAS signaling message, and according to the IP address and port corresponding to the found terminal identifier. And forwarding the RAS signaling message to the corresponding terminal.
  • the RAS signaling message such as a DRQ message, an IRQ message, etc.
  • FIG. 1 is a schematic diagram of networking for implementing a RAS signaling inter-network segment interworking system according to an embodiment of the present invention.
  • the system includes a terminal and a gatekeeper.
  • the terminal protocol stack is in different network segments and cannot communicate with each other.
  • the RAS agent is introduced in the embodiment, and the main functions implemented by each network element are as follows:
  • the terminal protocol stack mainly implements signaling interaction with the gatekeeper and the multipoint control module (MCU); the gatekeeper is mainly responsible for handling terminal registration, call, bandwidth management, etc.;
  • the RAS proxy is mainly used to implement the interworking processing of the RAS signaling across the network segment, including: sending the terminal protocol stack in the network segment B to the proxy RAS message, and forwarding the network protocol to the gatekeeper through another network segment A; The RAS message of the gatekeeper in segment A is forwarded to the terminal through network segment B.
  • the registration of the conference terminal (also referred to as the terminal) to the RAS proxy can be implemented as follows:
  • the RAS proxy can span multiple network segments. In the case of multiple network segments, each network segment has a corresponding IP address.
  • the RAS proxy can listen for packets on the IP addresses of multiple network segments.
  • the terminal is registered to the IP address of the network segment corresponding to the RAS proxy.
  • the RAS agent has the RAS codec function and can resolve RAS signaling.
  • RAS signaling only need to update sqNum, or extract some related information (such as IP address, port information, etc.) to save, other content without modification, directly forward all the content.
  • RAS agent is also used to:
  • the network segment A After receiving the RCF or RRJ message from the gatekeeper, the network segment A determines whether the RCF message has been recorded. If the terminal identifier, the source IP address, and the port of the terminal are not recorded, create a terminal list, and save the terminal identifier, source IP address, and port in the RCF message in the newly created terminal list. Update the list of recorded terminals.
  • the RAS agent when it receives other messages from network segment B, it should also determine the source IP and port. If there is already a corresponding record, it will forward it to the gatekeeper; if there is no record, it indicates that the terminal has not been registered, then discard it. .
  • the RAS proxy may, after receiving the RAS signaling message initiated by the gatekeeper, search for the saved terminal list according to the terminal identifier carried in the RAS signaling message, and forward the RAS signaling message to the corresponding terminal.
  • the RAS proxy can establish a timeout mechanism. If the RRQ (including the keep-alive RRQ or the full RRQ) or the IRR message is not received within a predetermined length of time (such as 10 minutes) after receiving the RRQ message of the terminal, delete the corresponding Source IP address, port, and terminal ID in the terminal list.
  • a predetermined length of time such as 10 minutes
  • RAS signaling is ⁇ UDP question and answer.
  • the RAS signaling interaction process between modules is shown in Figure 2.
  • the RAS signaling initiated by the terminal includes: a registration request message, an ARQ (call request message), a URQ (unregistration request message), a DRQ (delete request message), or an RR (state keep-alive message).
  • the RAS signaling initiated by the gatekeeper includes: DRQ (Delete Request Message), IRQ (Terminal State Request Message), and the like.
  • the DRQ message can be initiated by the terminal or by the GK.
  • FIG. 3 shows the process of transmitting the RRQ by the terminal as an example.
  • the RAS proxy implements the signaling forwarding process.
  • the forwarding policy is also applicable. As shown in Figure 3, the process is described as follows:
  • the RAS agent After the RAS agent receives the RRQ message sent by the terminal, because there is only one gatekeeper, the RAS signaling can be directly forwarded to the gatekeeper, and a forwarding mapping table is established according to the sqNum sequence number in the RAS signaling before the transmission. The table stores the IP address, identity, port and other related information of the relevant terminal.
  • the RAS proxy After receiving the RCF message of the gatekeeper reply, the RAS proxy parses the sequence number in the message and finds the IP address of the corresponding terminal according to the index, and sends the IP address to the corresponding terminal. .
  • the terminal list is also created or updated according to the IP address and the terminal identifier of the terminal in the RCF message, where the terminal list is used for saving. Correspondence between the IP address, port, and terminal ID of the terminal.
  • FIG. 4 shows the process of sending a DRQ by a gatekeeper as an example.
  • the RAS proxy implements the signaling forwarding process.
  • the forwarding policy is also applicable. As shown in Figure 4, the process is described as follows:
  • the terminal list established by the previous RAS proxy is used.
  • the terminal list is mainly indexed by the terminal identifier (endPointID), and the IP address and port information of the terminal are mainly saved, so that the RAS proxy
  • the corresponding terminal address can be found through the terminal list. That is, when the RAS proxy receives the RAS signaling message initiated by the gatekeeper, it searches the terminal list according to the terminal identifier in the RAS signaling message, and then the RAS signaling according to the IP address and port corresponding to the found terminal identifier. The message is forwarded to the corresponding terminal.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Telephonic Communication Services (AREA)

Abstract

La présente invention porte sur un procédé et un système de mise en œuvre d'intercommunication de signalisation intersegment dans un système de visioconférence, lesquels sont utilisés pour mettre en œuvre l'intercommunication de signalisation d'enregistrement, d'admission et d'état (RAS) entre des terminaux situés dans différents segments de réseau et le portier situé dans le réseau externe. Le procédé comprend les opérations suivantes : un terminal s'enregistre auprès d'un agent RAS, après réception d'un message de signalisation RAS envoyé par le terminal, l'agent RAS établit une relation de correspondance entre le numéro d'ordre figurant dans le message de signalisation RAS et l'adresse IP de source et un port du terminal, et transmet le message de signalisation RAS au portier; après réception d'un message de réponse RAS envoyé par le portier, l'agent RAS envoie, conformément à la relation de correspondance établie, le message de réponse RAS au terminal correspondant.
PCT/CN2011/074993 2010-06-29 2011-05-31 Procédé et système de mise en œuvre d'intercommunication de signalisation intersegment dans un système de visioconférence WO2012000364A1 (fr)

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CN101867586B (zh) * 2010-06-29 2014-08-13 中兴通讯股份有限公司 实现会议电视系统跨网段信令互通的方法及系统
CN102523572B (zh) * 2011-11-23 2017-12-22 中兴通讯股份有限公司 呼叫请求消息的处理方法及装置
CN102594866B (zh) * 2011-12-22 2015-02-18 中国电子科技集团公司第十五研究所 地图服务提供系统和方法
CN104660952B (zh) * 2015-03-04 2018-06-08 苏州科达科技股份有限公司 视频会议通信方法和系统
CN108055262B (zh) * 2017-12-11 2020-08-18 苏州科达科技股份有限公司 视频会议终端注册方法、终端及网守
CN109445925B (zh) * 2018-11-09 2022-02-18 郑州云海信息技术有限公司 一种应用程序接管方法、装置及系统
CN109889763B (zh) * 2019-03-20 2020-12-25 苏州科达科技股份有限公司 会议电视系统的呼叫建立方法、装置及存储介质
CN111083427B (zh) * 2019-12-27 2021-05-18 随锐科技集团股份有限公司 嵌入式终端、4k视频会议系统的数据处理方法

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