WO2003019862A1 - A calling method for node across zones in ip network system - Google Patents

A calling method for node across zones in ip network system Download PDF

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Publication number
WO2003019862A1
WO2003019862A1 PCT/CN2002/000221 CN0200221W WO03019862A1 WO 2003019862 A1 WO2003019862 A1 WO 2003019862A1 CN 0200221 W CN0200221 W CN 0200221W WO 03019862 A1 WO03019862 A1 WO 03019862A1
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Prior art keywords
node
calling
called
gatekeeper
alias
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French (fr)
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Jinsong Xie
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to JP2003524190A priority Critical patent/JP2005500786A/ja
Priority to US10/488,111 priority patent/US8032638B2/en
Priority to ES02721957.5T priority patent/ES2509290T3/es
Priority to EP02721957.5A priority patent/EP1432173B1/en
Publication of WO2003019862A1 publication Critical patent/WO2003019862A1/zh
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/25—Flow control; Congestion control with rate being modified by the source upon detecting a change of network conditions
    • 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
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/14—Session management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/40—Network security protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
    • H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
    • H04L69/322—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions
    • H04L69/329—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions in the application layer [OSI layer 7]

Definitions

  • the present invention relates to an IP network technology, and more particularly to a cross-region calling method for a node in an IP network system, and is a technology for configuring a unique IP alias for all H.323 nodes on an IP network.
  • the H.323 protocol is mainly used in multimedia conference systems, but has been widely used in the field of IP telephony.
  • the H.323 system provides multimedia communication services in a packet network that does not guarantee quality of service.
  • the packet network includes a local area network, an enterprise network, and a metropolitan area network.
  • the H.323 system consists of terminals, gateways, multi-point control units (MCUs), and gatekeepers (GK for short).
  • MCUs multi-point control units
  • GK gatekeepers
  • one of the main service functions provided by GK is the address resolution service, which includes translating node aliases into node IP addresses.
  • Node aliases include E.164 number, H.323ID, URL, and EMAIL, etc. These aliases are registered by the node to the GK through RRQ signaling of H.225RAS.
  • H.323 systems allow multiple GK domains. Each GK domain contains one or more GKs and a group of H.323 nodes. H323 nodes in the GK domain are registered on their respective GKs.
  • FIG. 1 shows the network structure of the H.323 system, which is the area network structure of the H.323 system nodes. In the figure, the node aliases in the two areas of GK1 domain 1 and GK2 domain 2 are duplicated.
  • the H.323 node aliases 123456, 123123, and 123789 in domain 1 are respectively related to the H.323 nodes in domain 2.
  • the aliases 123456, 123123, and 123789 are the same.
  • the nodes in the same area can obtain each other's IP address through the address resolution service of the GK, the nodes in different areas cannot resolve the IP address of the node with the same alias.
  • GK1 can only resolve the IP address of the 123123 node in the domain 1 to the calling node 123456, but cannot resolve the The IP address is resolved to the calling node 123456.
  • each GK domain can define the aliases of the nodes in the respective domains without restriction.
  • the GK can only The IP addresses of the nodes in this domain are resolved, but cannot be resolved to the IP addresses of nodes in other GK domains. This is caused by the uniqueness of each node alias in the entire network without technical guarantee.
  • the object of the present invention is to design a method for inter-area calling of nodes in an IP network system, which uses a uniform node alias addressing so that the aliases of all H.323 nodes in the network system are unique, thereby facilitating the realization of differences on the IP network.
  • a method for inter-region calling of a node in an IP network system is characterized by including the following processing steps:
  • the E.164 alias of each H.323 node in the network consists of a unique area prefix number in the IP network system plus a unique node number in the gatekeeper (GK);
  • the calling H.323 node uses the E.164 alias of the called H.323 node to directly call the called node.
  • the step B further includes:
  • the calling gatekeeper (GK) receives the ARQ call request signaling from the calling node; b.
  • the calling gatekeeper (GK) extracts the prefix number in the E.164 alias of the called H.323 node, and finds the The IP address of the called gatekeeper (GK) corresponding to the prefix number, the calling gatekeeper (GK) sends LRQ signaling to the called gatekeeper (GK) according to the IP address, and requests to resolve the IP address of the called H.323 node ;
  • the called gatekeeper (GK) resolves the IP address of the called H.323 node according to the E.164 alias of the called H.323 node and returns it to the calling gatekeeper (GK) through the LCF command;
  • the calling gatekeeper informs the calling H.323 node of the IP address of the called H.323 node through ACF signaling;
  • the calling H.323 node sends a Q.931 call setup instruction (setup) to the called H.323 node according to the IP address of the called H.323 node, and starts the call.
  • the implementation of the present invention needs to uniquely number the GK area in each IP network system to form a prefix number of the node alias; use the unique number of each node in each GK area to form the node number of the node alias; and then "GK area prefix number + node number", forming an E.164 alias of a predefined (registered) node.
  • the method of the present invention well solves the problem of uniqueness of the entire network of the node alias, so that any GK in the entire network can be resolved to the IP addresses of all nodes on the IP network according to the alias, which is convenient.
  • Implemented cross-region calling is convenient.
  • FIG. 1 is a schematic diagram of a regional network structure of a H.323 system node in the background art.
  • FIG. 2 is a schematic diagram of the area networking structure of the H.323 system node in the technology of the present invention.
  • FIG. 3 is a schematic diagram of a node inter-region call flow according to the present invention. Mode of Carrying Out the Invention
  • each node on each gatekeeper defines in advance its unique E.164 alias within the gatekeeper, that is, each GK domain
  • Each managed node is registered with a predefined E.164 number; it is combined with a unique area code of each GK area in the network system to achieve unified and unique node alias addressing and cross-area addressing and calling.
  • each GK area has a GK area prefix number.
  • Each GK area prefix number is unique in the entire IP network system. For example, the GK area prefix number of domain 1 is 0755. The GK area prefix number of 2 is 010, and the GK area prefix number of domain 3 is 021.
  • the E.164 aliases of the nodes in the same GK area are not repeated, but the E.164 aliases of the nodes in different GK areas can be the same.
  • the same E exists in domain 1, domain 2, and domain 3.
  • the present invention allows the alias of each node in each GK area to be composed of "GK area prefix number, +" node E.164 number ".
  • the aliases of the three nodes in domain 1 are
  • the aliases of the three nodes in domain 2 are 010123456, 010123123, and 010123789, and the aliases of the three nodes in domain 3 are 021123456, 021123123, and 021123789.
  • the aliases of the nodes in each area are unique within the entire network. Because the alias of each node is predefined by GK, this technically guarantees that the node must be registered according to the specified alias, which ensures the uniqueness of the node alias.
  • the present invention defines the technical basis for the implementation of node cross-region (GK) calls.
  • the call flow when the A node 0755123456 in the 0755 area calls the B node 010123123 in the 010 area is:
  • Step 1 Node A (0755123456) sends AQ (010123123) call request signaling to GK1.
  • Step 2 GK1 extracts the prefix number 010 of the called number from the received ARQ call request signaling, and learns that the called node B is in the GK2 area (obtaining the IP address of the called gatekeeper) according to the prefix number, so GK1 Send a request to the GK2 area through LRQ (010123123) signaling, requesting to resolve the IP address of Node B;
  • Step 3 After receiving the LRQ, GK2 resolves the IP address of Node B according to the called number 010123123, and returns it to GK1 through the LCF command.
  • Step 4 after GK1 receives the LCF command, it then informs node A of the IP address of node B via ACF signaling;
  • Step 5 Node A sends Q.931 call setup (setup) signaling to Node B according to the IP address of Node B, and starts the call;
  • Step 6 Enter the call proceeding (Call proceeding).
  • the method of the present invention configures the unique E.164 alias in the entire network system for all H.323 nodes in the IP network system by using unified alias addressing, thereby easily and conveniently implementing node addressing and calling across the GK area. Trial proved to be feasible and reliable.

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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)
  • Computer Security & Cryptography (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Telephonic Communication Services (AREA)

Description

IP网络系统中的节点跨区域呼叫方法 技术领域
本发明涉及一种 IP网络技术， 更确切地说是涉及 IP网络系统中节 点的一种跨区域呼叫方法，是为 IP网络上所有的 H.323节点配置唯一的 IP别名的技术。 发明背景
H.323协议主要用于多媒体会议系统，但目前已广泛应用于 IP电话领 域中。 H.323系统在不保证服务质量的分组网中提供多媒体通信业务， 分组网包括局域网、 企业网、 城域网等。 H.323系统由终端、 网关、 多 点控制单元（MCU ) 、 网守 （Gatekeeper, 筒称 GK )等单元组成， 其中 的 MCU、 终端、 网关组成 H323节点。 H.323节点注册在 GK上， 并得到 GK的服务。
在 H.323系统中， GK提供的主要服务功能之一是地址解析服务， 包 括将节点别名翻译成节点的 IP地址。 节点的别名包括 E.164号码、 H.323ID、 URL和 EMAIL等， 这些别名是节点通过 H.225RAS的 RRQ信令 注册到 GK上的。 H.323系统中允许有多个 GK域， 每个 GK域包含了一个 或多个 GK以及一批 H.323节点， GK域内的 H323节点分别注册在各自的 GK上。
目前对一个 GK域内各 H.323节点的别名配置仅有唯一性要求， 而对 不同域内的各节点的别名配置是没有限制的，因而导致不同 GK域所管理 的节点的别名很有可能重复，这样就给跨 GK区域的节点寻址和呼叫造成 了困难。 图 1中示意出 H.323系统的组网结构， 是 H.323系统节点区域组网结 构。 图中， GK1域 1和 GK2域 2两个区域的节点别名就发生了重复的情况， 如图中域 1中的 H.323节点别名 123456、 123123、 123789分別与域 2中的 H.323节点别名 123456、 123123、 123789相同。 虽然同一区域内的节点 间可以互相通过所在 GK的地址解析服务得到对方的 IP地址，但是不同区 域的节点之间， GK就无法解析别名相同的节点的 IP地址了。
例如当 GK1域中的节点 123456需要呼叫 GK2域中的节点 123123时， GK1只能将域 1中的 123123节点的 IP地址解析给主叫节点 123456,却不能 将域 2中的被叫 123123节点的 IP地址解析给主叫节点 123456。
上述配置 H.323节点别名技术方法的优点是可使每个 GK域能够不受 约束地定义各自域内节点的别名； 但是， 由于 H.323系统之间没有统一 的别名编码方式， 导致 GK只能解析本域内节点的 IP地址， 而无法解析到 其他 GK域中的节点的 IP地址，这是每个节点别名在整个网络中的唯一性 没有技术保证所造成的。
目前， 随着 IP网络视讯技术的发展和 IP网络系统中 H.323节点数 目的增多， H.323节点的 IP别名的唯一性问题就越来越突出。 发明内容
本发明的目的是设计一种 IP网络系统中的节点跨区域呼叫方法，利 用统一的节点别名编址，使网络系统内所有 H.323节点的别名是唯一的， 从而方便地实现 IP网络上不同 GK域内任意节点间的跨区域的寻址和呼 叫。
实现本发明目的的技术方案是这样的：一种 IP网络系统中的节点跨 区域呼叫方法， 其特征在于包括如下处理步骤：
A. 在 IP网络系统中的每一个网守 （GK )上预先注册网守 （GK ) 中每一个 H.323节点的 E.164别名，由一个在 IP网络系统中唯一的区域 前綴号加上在网守 （GK ) 中唯一的节点编号组成；
B. 主叫 H.323节点利用被叫 H.323节点的 E.164别名直接呼叫被 叫节点。
所述的步骤 B进一步包括：
a. 主叫网守 （GK )接收到主叫节点的 ARQ呼叫请求信令； b. 主叫网守 ( GK )提取出被叫 H.323节点 E.164别名中的前缀号， 并找到与前缀号对应的被叫网守（GK )的 IP地址， 主叫网守（GK )根 据该 IP地址向被叫网守 （GK )发送 LRQ信令， 请求解析被叫 H.323 节点的 IP地址;
c 被叫网守（ GK )根据被叫 H.323节点 E.164别名解析出被叫 H.323 节点的 IP地址， 并通过 LCF命令返回给主叫网守 （GK );
d. 主叫网守 （GK )通过 ACF信令将被叫 H.323节点的 IP地址通 知主叫 H.323节点；
f. 主叫 H.323节点根据被叫 H.323节点的 IP地址向被叫 H.323节 点发送 Q.931的呼叫建立指令 ( setup ), 开始呼叫。
本发明的实施需要为每一个 IP网络系统中的 GK区域进行唯一性的 编号，形成节点别名的前缀号； 利用每一个 GK区域中各节点的唯一性编 号， 形成节点别名的节点号码； 然后使 "GK区域前綴号 +节点号码" ， 形成预定义（注册） 节点的 E.164别名。
本发明的方法与现有技术相比， 很好地解决了节点别名的全网唯一 性问题，从而使全网内任意一个 GK都可以根据别名解析到 IP网络上所 有节点的 IP地址， 方便地实现了跨区域的呼叫。 附图简要说明
图 1是背景技术中 H.323系统节点区域组网结构示意图。
图 2是本发明技术中 H.323系统节点区域组网结构示意图。
图 3是本发明的节点跨区域呼叫流程示意图。 实施本发明的方式
下面结合附图对本发明进行详细描述。
本发明技术方案中给各节点配置唯一别名的基本思想是： 首先为每 一网守 （GK ) 上的各节点预先定义其在本网守内唯一的 E.164别名， 即 让每一 GK域所管理的各节点以预定义的 E.164号码进行注册； 再同时结 合一个在网络系统内唯一的各 GK区域的区号，从而实现统一且唯一的节 点别名编址和跨区域寻址与呼叫。
图 2中， 共有 3个 GK区域， 每个区域都有一个 GK区域前缀号， 每个 GK区域前缀号在整个 IP网络系统内是不重复的，如域 1的 GK区域前缀号 是 0755, 域 2的 GK区域前缀号是 010， 域 3的 GK区域前缀号是 021。
在同一个 GK区域内的各节点的 E.164别名是不重复的，但不同 GK区 域内节点的 E.164别名可以是相同的，如域 1、域 2、域 3内存在相同的 E.164 别名 123456、 123123、 123789。
本发明让每个 GK区域中每一个节点的别名都以" GK区域前缀号，，+ "节点 E.164号码"的方式组成， 如域 1中的三个节点的别名分别是
0755123456、 0755123123和 0755123789, 域 2中的三个节点的别名分别 是 010123456、 010123123和 010123789, 域 3中的三个节点的别名分别是 021123456、 021123123和 021123789。 通过这种编址方法， 使每个区域 的节点的别名在全网内是唯一的。 由于各节点的别名是由 GK预定义的，这就从技术上保证了节点必须 按照规定的别名进行注册， 确保了节点别名的唯一性。
本发明通过解决节点别名的唯一性问题， 给节点跨区域（ GK )呼叫 的实现典定了技术基础。
参见图 3, 结合参见图 2, 如 0755区域的 A节点 0755123456呼叫 010 区域的 B节点 010123123时的呼叫流程是：
步驟 1, A节点 （0755123456 ) 向 GK1发出 A Q ( 010123123 )呼叫 请求信令；
步骤 2 , GK1从接收到的 ARQ呼叫请求信令中提取出被叫号码的前 缀号 010， 根据该前缀号得知被叫 B节点在 GK2区域（获得被叫网守的 IP 地址） ， 于是 GK1就通过 LRQ ( 010123123 )信令向 GK2区域发出请求， 请求解析 B节点的 IP地址；
步骤 3, GK2收到 LRQ后，根据被叫号码 010123123解析出 B节点的 IP 地址， 然后通过 LCF命令返回给 GK1;
步骤 4, GK1接收到 LCF命令后， 再通过 ACF信令将 B节点的 IP地址 告诉 A节点；
步驟 5, A节点根据 B节点的 IP地址向 B节点发送 Q.931的呼叫建立 ( setup )信令， 开始呼叫；
步骤 6, 进入呼叫程序 （ Call proceeding ) 。 本发明方法通过使用统一别名编址， 对 IP网络系统中所有的 H.323 节点配置全网络系统中唯一的 E.164别名，从而简单方便地实现了跨 GK 区域的节点寻址与呼叫， 经试用， 证明是可行且可靠的。

Claims

权利要求书
1. 一种 IP网络系统中的节点跨区域呼叫方法， 其特征在于包括 如下处理步骤：
A. 在 IP网络系统中的每一个网守 （GK )上预先注册网守 （GK ) 中每一个 H.323节点的 E.164别名，由一个在 IP网络系统中唯一的区域 前缀号加上在网守 （GK ) 中唯一的节点编号组成；
B. 主叫 H.323节点利用被叫 H.323节点的 E.164别名直接呼叫被 叫节点。
2. 根据权利要求 1所述的一种 IP网络系统中的节点跨区域呼叫 方法， 其特征在于所述的步骤 B进一步包括：
a. 主叫网守 （GK )接收到主叫节点的 ARQ呼叫请求信令；
b. 主叫网守 （ GK )提取出被叫 H.323节点 E.164别名中的前缀号， 并找到与前缀号对应的被叫网守 （GK )的 IP地址， 主叫网守（GK )根 据该 IP地址向被叫网守 （GK )发送 LRQ信令， 请求解析被叫 H.323 节点的 IP地址;
c 被叫网守（ GK )根据被叫 H.323节点 E.164别名解析出被叫 H.323 节点的 IP地址， 并通过 LCF命令返回给主叫网守 （GK );
d. 主叫网守 （GK )通过 ACF信令将被叫 H.323节点的 IP地址通 知主叫 H.323节点；
f. 主叫 H.323节点根据被叫 H.323节点的 IP地址向被叫 H.323节 点发送 Q.931的呼叫建立指令 ( setup ), 开始呼叫。
PCT/CN2002/000221 2001-08-29 2002-03-29 A calling method for node across zones in ip network system Ceased WO2003019862A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2003524190A JP2005500786A (ja) 2001-08-29 2002-03-29 Ｉｐネットワークシステムにおいて複数のゾーンにわたるエンドポイント装置の呼び出し方法
US10/488,111 US8032638B2 (en) 2001-08-29 2002-03-29 Calling method for node across zones in IP network system
ES02721957.5T ES2509290T3 (es) 2001-08-29 2002-03-29 Un método para realizar llamadas entre zonas por parte de un nodo en un sistema de red IP
EP02721957.5A EP1432173B1 (en) 2001-08-29 2002-03-29 A calling method for node across zones in ip network system

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US20040186913A1 (en) 2004-09-23
EP1432173A1 (en) 2004-06-23
RU2272361C2 (ru) 2006-03-20
CN1180573C (zh) 2004-12-15
JP2005500786A (ja) 2005-01-06
RU2004109987A (ru) 2005-10-20
CN1407759A (zh) 2003-04-02
EP1432173B1 (en) 2014-07-23
EP1432173A4 (en) 2007-01-10
US8032638B2 (en) 2011-10-04

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