WO2005117346A1 - Procede d'enregistrement de terminal de reseau prive aupres du controleur fonde sur le protocole h.323 - Google Patents

Procede d'enregistrement de terminal de reseau prive aupres du controleur fonde sur le protocole h.323 Download PDF

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Publication number
WO2005117346A1
WO2005117346A1 PCT/CN2004/000890 CN2004000890W WO2005117346A1 WO 2005117346 A1 WO2005117346 A1 WO 2005117346A1 CN 2004000890 W CN2004000890 W CN 2004000890W WO 2005117346 A1 WO2005117346 A1 WO 2005117346A1
Authority
WO
WIPO (PCT)
Prior art keywords
private network
proxy server
network terminal
gatekeeper
registration
Prior art date
Application number
PCT/CN2004/000890
Other languages
English (en)
Chinese (zh)
Inventor
Jiazhou Li
Jia Cao
Can Shen
Jun Li
Original Assignee
Zte Corporation
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 Zte Corporation filed Critical Zte Corporation
Priority to CNB2004800430517A priority Critical patent/CN100525202C/zh
Publication of WO2005117346A1 publication Critical patent/WO2005117346A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/09—Mapping addresses
    • H04L61/25—Mapping addresses of the same type
    • H04L61/2503—Translation of Internet protocol [IP] addresses
    • H04L61/2517—Translation of Internet protocol [IP] addresses using port numbers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • 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
    • H04L65/1106—Call signalling protocols; H.323 and related

Definitions

  • the present invention relates to multimedia communication, and in particular, to a method for registering a multimedia terminal based on the H. 323 protocol.
  • H. 323 protocol is a packet network multimedia developed by the International Telecommunication Union ITU-T Communication standards. Because many enterprises have their own local area networks (private networks), private IP addresses are used inside the local area network. When terminals on the local area network need to access the public network, they usually undergo network address translation (Network Addres s Translatation, NAT ) The device converts the private network address to the public network address. Network address translation NAT—Generally, there are three methods: static NAT, dynamic NAT, and port NAT.
  • the static NAT method is a one-to-one translation between a private network address and a public network address, allowing devices on the public network to access the private network.
  • the H. 323 protocol itself does not consider the application of NAT, and its embedded address conflicts with the NAT device, which causes the problem of interworking between private and public networks.
  • H. 323 proxy server is located in the private network, and H. 323 proxy on the NAT device.
  • the server uses static NAT to perform network address translation, so that devices on the public network can access the H.323 proxy server.
  • the terminals in the private network designate the H.323 proxy server as the gatekeeper, which provides address resolution and Devices for services such as bandwidth management; terminals in the private network send registration requests to the H. 323 proxy server, and then the H. 323 proxy server acts as a terminal to register with the gatekeeper of the public network. Because the H. 323 proxy server has previously converted the IP address in the H. 323 protocol into the public network address of the static NAT of the H. 323 proxy server, the The IP address is the public network address of the H. 323 proxy server.
  • terminal 1 and terminal 1 in the private network are connected to the H. 323 proxy server, and the H. 323 proxy server is connected to the NAT device.
  • the NAT device is connected to the gatekeeper in the public network.
  • a private protocol is used for communication between the H.323 proxy server and the public network gatekeeper.
  • the H.323 proxy server receives the registration message from the private network terminal, it initiates registration with the gatekeeper, and the registration message contains non-standard messages.
  • the gatekeeper knows that the registration message is sent by the H.323 proxy server according to the non-standard message, and then the gatekeeper records the information of the terminal sent by the H.323 proxy server. If there is a call from a public network terminal, the H.323 proxy server is registered. Terminal, the gatekeeper directs the call to the H.323 proxy server. '
  • the registration message sent by the H. 323 terminal contains a non-standard message, which requires the non-standard message to be supported between the gatekeeper and the H. 323 proxy server.
  • the disadvantage of this method is obvious and cannot be Solve the problem of interconnection.
  • the H. 323 proxy server and the gatekeeper adopt the H. 323 standard protocol, and the registered address in the terminal registration request forwarded by the 323 proxy server adopts the public network call address of the 323 proxy server, that is, Public network IP address + port format.
  • this method will cause this phenomenon, that is, all registration messages registered to the public network gatekeeper through the same H.323 proxy server correspond to the same address.
  • This requires the gatekeeper to be able to check only the registered terminal alias (terminal name). ), Add a new registration information for the terminal alias that does not exist, so that different terminal aliases on the gatekeeper correspond to the same address.
  • some types of gatekeepers need to check when receiving registration information.
  • Register address if the gatekeeper finds that the registered address is the same, it considers them to be the same terminal, and the gatekeeper will overwrite the original registration information with the newly received registration information, that is, some types of gatekeepers do not support multiple terminals corresponding to the same registration Address situation.
  • the technical problem to be solved by the present invention is to propose a method for registering a private network terminal with a gatekeeper based on the H.323 protocol, which overcomes the problem that when an H.323 proxy server that performs network address translation in the prior art registers with a gatekeeper, Incompatibility with different types of gatekeepers, and the case where multiple terminals do not support the same registered address.
  • the core idea of the present invention is: perform static network address translation on the H. 323 proxy server on the network address translation device; the private network terminal initiates a registration request to the H. 323 proxy server; the H. 323 proxy server dynamically allocates the private network terminal Listening port, and modify the registered address in the registration request to the public IP address of the H.323 proxy server and the listening port allocated above; the H.323 proxy server registers with the public network gatekeeper.
  • the method for registering a private network terminal based on the H. 323 protocol with a gatekeeper specifically includes: establishing a listening port pool according to the number of private network terminals proxied by the H. 323 proxy server;
  • the 323 proxy server performs static network address translation and opens the port of the listening port pool. Set the listening port pool on the H. 323 proxy server.
  • the private network terminal designates the public network gatekeeper as the proxy server, and sends a registration request to the H.323 proxy server;
  • the 323 proxy server determines whether the private network terminal is registered for the first time after receiving the registration request from the private network terminal; if so, it selects a port in the listening port pool that is not occupied by another terminal, and Listen on the port; if not, use the listening port assigned to the private network terminal;
  • the H. 323 proxy server modifies the registered address in the registration request message to the public network address of the H. 323 proxy server after static network address translation and the H. 323 proxy server assigns the private network terminal Listening port, sending a registration request message to the gatekeeper;
  • the gatekeeper authenticates the received registration request; if the authentication is passed, the registration information of the private network terminal is recorded; the gatekeeper sends a confirmation message to the H.323 proxy server, and the H.323 proxy server records the private network terminal after receiving it And send a confirmation message to the private network terminal, and the registration ends;
  • the gatekeeper sends a rejection message to the H.323 proxy server.
  • the H.323 proxy server releases the listening port of the private network terminal and sends a rejection message to the private network terminal. The registration ends.
  • the number of listening port pool ports is equal to the number of private network terminals proxied by the H.323 proxy server.
  • the registered address in the registration request sent by the private network terminal to the H.323 proxy server is the private network address of the private network terminal and a listening port on the private network terminal.
  • the gatekeeper authenticates the registration request sent by the H.323 proxy server, check whether the private network terminal is registered for the first time; if so, add the registration information of the private network terminal; if the If the private network terminal has been registered, the registration information of the private network terminal is updated.
  • the above method further includes the step of actively canceling the registration of the private network terminal, specifically: the private network terminal sends a message to cancel the registration to the H.323 proxy server; the H. 323 proxy server releases it as the private network terminal after receiving it The assigned listening port then sends a deregistration message to the gatekeeper; after receiving the deregistration message, the gatekeeper sends a deregistration confirmation message to the H.323 proxy server; the H.323 proxy server will receive a deregistration confirmation message Forward to the private network terminal, and cancel the registration.
  • the private network terminal sends a message to cancel the registration to the H.323 proxy server
  • the H. 323 proxy server releases it as the private network terminal after receiving it
  • the assigned listening port then sends a deregistration message to the gatekeeper; after receiving the deregistration message, the gatekeeper sends a deregistration confirmation message to the H.323 proxy server; the H.323 proxy server will receive a deregistration confirmation message Forward to the private network terminal, and cancel the registration.
  • the above method further includes the step of the gatekeeper canceling the registration of the private network terminal, which is specifically: the gatekeeper sends a message to cancel the registration of the private network terminal to the H. 323 proxy server; The listening port allocated for the deregistered private network terminal, and then sends a deregistration message to the private network terminal.
  • the private network terminal After receiving the deregistration message, the private network terminal sends a request to the H.323 proxy server.
  • the registration confirmation message is cancelled.
  • the H. 323 proxy server forwards the registration cancellation confirmation message to the gatekeeper, and the gatekeeper cancels the registration of the private network terminal.
  • the method of the present invention establishes a listening port pool, and uses the same public network IP address and different listening ports to identify different private network terminals, so that different private network terminals pass through the same H.323 proxy server.
  • the registered addresses are different, so that the gatekeeper can distinguish different private network terminals, and solves the problem that multiple terminals correspond to the same public network IP address.
  • the invention adopts a standard between the H.323 proxy server and the public network gatekeeper.
  • the H. 323 protocol improves the interoperability between H. 323 proxy servers and different types of gatekeepers.
  • Figure 1 is a schematic diagram of the topology of a network using an H.323 proxy server
  • FIG. 3 is a flowchart of a private network terminal actively canceling registration in the present invention
  • FIG. 4 is a flowchart of the gatekeeper canceling the registration of the private network terminal in the present invention.
  • FIG. 1 is a schematic diagram of a network using an H. 323 proxy server, which has been described in the background art.
  • the method of the present invention is also based on the network shown in FIG. 1, in which messages between the H.323 proxy server and the public network gatekeeper use the H.323 standard protocol for interaction.
  • the registered address of a private network terminal is expressed by using the private network IP address of the terminal plus the listening port of the terminal.
  • the 323 proxy server When the 323 proxy server is registered, it dynamically allocates listening ports to different private network terminals, and uses the same public IP address of the H.323 proxy server and different listening ports to identify different private network terminals, so that different private network terminals
  • the registered address sent by the network terminal through the same H. 323 proxy server is different , Thereby enhancing the interworking performance with different gatekeepers.
  • the main process of the method of the present invention is as follows: First, the H.323 proxy server establishes a listening port pool. After receiving the registration request of the private network terminal, the H.323 proxy server removes a listening port from the listening port pool, and The registered address of the network terminal registration request is modified to the public IP address of the H, 323 proxy server and the listening port assigned to the terminal, and then registered with the gatekeeper. If the registration fails, the H. 323 proxy server releases the private network. The listening port of the terminal for use by other terminals when registering.
  • the H.323 proxy server defines a listening port pool, that is, a segment of a port address according to the number of private network terminals that need to be proxyed.
  • the number of ports listening on the port pool is the same as that of the H.323 proxy server.
  • the number of proxy private network terminals is equal.
  • perform static NAT on the H.323 proxy server on the network address translation NAT device to obtain the public IP address of the H, 323 proxy server, and then open the listening port pool to allow terminals outside the NAT device to access the ⁇ .
  • 323 proxy The port on which the server listens; set the listening port pool on the 323 proxy server, and then start the 323 proxy server.
  • the private network terminal designates the gatekeeper as a proxy server, and sends a registration request to the 323 proxy month server, where the registered address is the private network address of the private network terminal and a listening port on the private network terminal.
  • the 323 proxy server determines whether the private network terminal is registered for the first time. The specific judgment method is to check whether the record of the private network terminal exists on the proxy server.
  • the 323 proxy server modifies the received registration request message, and changes the registered address to ⁇ .
  • Shou sends a registration message.
  • the gatekeeper performs authentication after receiving the registration request message from the 323 proxy server.
  • the registration information of the private network terminal is added; if the authentication is passed and the private network terminal has been registered, the registration information of the private network terminal is updated. Finally, the gatekeeper sends a registration confirmation message to the H. 323 proxy server. After receiving, the H. 323 proxy server records the registration information of the private network terminal, and sends a confirmation message to the private network terminal, and the registration ends. If the gatekeeper fails the authentication of the registration request message, the gatekeeper sends a registration rejection message to the H.323 proxy server. After receiving the H.323 proxy server, it releases the listening port allocated for the private network terminal, and sends the The private network terminal sends a rejection message, and the registration ends.
  • the step of actively canceling the registration of the private network terminal includes: The private network terminal sends a deregistration message to the H.323 proxy server; the H. 323 proxy server releases the listening port allocated for the private network terminal after receiving the message. , And then send a deregistration message to the gatekeeper; after receiving the deregistration message, the gatekeeper sends a deregistration confirmation message to the H.323 proxy server; the H.323 proxy server forwards the received deregistration confirmation message to the private network terminal At this point, the deregistration process ends.
  • the process of the gatekeeper canceling the registration of the private network terminal shown in FIG. 4 includes: the gatekeeper sends a message to the H.323 proxy server to cancel the registration of the private network terminal; the H. 323 proxy server releases it as the cancelled registration private server after receiving it.
  • the listening port allocated by the network terminal and then sends a deregistration message to the private network terminal; after receiving the deregistration message from the H.323 proxy server, the private network terminal sends a deregistration confirmation message to the H.323 proxy server; H 323
  • the proxy server forwards the message to the gatekeeper after receiving the deregistration confirmation message.
  • the process of the gatekeeper canceling the registration of the private network terminal ends.

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

Abstract

La présente invention concerne un procédé d'enregistrement de terminal de réseau privé auprès du contrôleur fondé sur le protocole H.323. Ce procédé consiste: à effectuer la traduction d'adresse de réseau statique pour le serveur proxy H.323 sur le dispositif de traduction d'adresse de réseau, le terminal de réseau privé lance la demande d'enregistrement auprès du serveur proxy H.323, le serveur proxy H.323 distribue le port d'écoute au terminal de réseau privé et modifie l'adresse d'enregistrement dans la demande d'enregistrement dans l'adresse de réseau public du serveur proxy H.323 et au-dessus du port d'écoute distribué et, le serveur proxy H.323 s'enregistre auprès du contrôleur. La présente invention utilise la même adresse IP de réseau public et un port d'écoute différent pour reconnaître le terminal de réseau privé différent de sorte que l'adresse d'enregistrement transmise par ce terminal de réseau privé via le même serveur proxy H.323 soit différente. Le contrôleur peut ainsi distinguer les différents terminaux de réseau privé et le problème dû au fait que des terminaux multiples correspondent à une adresse IP de réseau public est résolu. Ce faisant, cette invention utilise le protocole H.323 standard entre le serveur proxy H.323 et les différents types de contrôleur.
PCT/CN2004/000890 2004-05-28 2004-08-02 Procede d'enregistrement de terminal de reseau prive aupres du controleur fonde sur le protocole h.323 WO2005117346A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNB2004800430517A CN100525202C (zh) 2004-05-28 2004-08-02 一种基于h.323协议的私网终端向网守注册的方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200410042871.6 2004-05-28
CNB2004100428716A CN1299476C (zh) 2004-05-28 2004-05-28 一种h.323代理服务器代理网络地址转换后的终端向网守注册的方法

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PT (1) PT2005117346W (fr)
WO (1) WO2005117346A1 (fr)

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CN113038592A (zh) * 2019-12-24 2021-06-25 阿里巴巴集团控股有限公司 物联网设备之间的通信方法和装置
CN117221396A (zh) * 2023-10-26 2023-12-12 深圳市拓普泰尔科技有限公司 网络数据交互方法、装置、系统、存储介质和计算机设备

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CN101188582B (zh) * 2006-11-17 2010-09-29 中兴通讯股份有限公司 穿越异构网络进行h.323终端通讯的系统和方法
CN101193112B (zh) * 2006-12-01 2010-10-27 华为技术有限公司 一种注册方法和代理服务器
US8429279B2 (en) * 2007-09-28 2013-04-23 Siemens Enterprise Communications Gmbh & Co. Kg Method and device for connecting packet-oriented communication terminals
US20130138813A1 (en) * 2011-11-28 2013-05-30 Microsoft Corporation Role instance reachability in data center
CN103607333A (zh) * 2013-11-22 2014-02-26 深圳维盟科技有限公司 端口代理服务器的局域网端口代理方法
CN105743715B (zh) * 2016-04-20 2020-01-07 上海斐讯数据通信技术有限公司 一种网关设备的管理系统及方法
CN114745169A (zh) * 2022-04-06 2022-07-12 北京天融信网络安全技术有限公司 基于nat映射的多端口访问方法、装置、设备、介质和产品

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CN113038592B (zh) * 2019-12-24 2023-05-05 阿里巴巴集团控股有限公司 物联网设备之间的通信方法和装置
CN117221396A (zh) * 2023-10-26 2023-12-12 深圳市拓普泰尔科技有限公司 网络数据交互方法、装置、系统、存储介质和计算机设备

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Publication number Publication date
CN1585364A (zh) 2005-02-23
CN1299476C (zh) 2007-02-07
PT2005117346W (pt) 2007-05-31

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