WO2008000134A1 - Méthode et dispositif de transmission d'un message de demande dans un système multimédia - Google Patents

Méthode et dispositif de transmission d'un message de demande dans un système multimédia Download PDF

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Publication number
WO2008000134A1
WO2008000134A1 PCT/CN2007/001589 CN2007001589W WO2008000134A1 WO 2008000134 A1 WO2008000134 A1 WO 2008000134A1 CN 2007001589 W CN2007001589 W CN 2007001589W WO 2008000134 A1 WO2008000134 A1 WO 2008000134A1
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WIPO (PCT)
Prior art keywords
request message
preset condition
request
message
address
Prior art date
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PCT/CN2007/001589
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English (en)
French (fr)
Inventor
Hui Li
Original Assignee
Huawei Technologies Co., Ltd.
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 Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Priority to EP07721162A priority Critical patent/EP2034688A4/en
Publication of WO2008000134A1 publication Critical patent/WO2008000134A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10—Architectures or entities
    • H04L65/1016—IP multimedia subsystem [IMS]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10—Architectures or entities
    • H04L65/1063—Application servers providing network services
    • 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
    • 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
    • H04L65/1096—Supplementary features, e.g. call forwarding or call holding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/1066—Session management
    • H04L65/1101—Session protocols
    • H04L65/1104—Session initiation protocol [SIP]
    • 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
    • H04L67/50—Network services
    • H04L67/51—Discovery or management thereof, e.g. service location protocol [SLP] or web services

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method and apparatus for transmitting a request message in a multimedia system. Background technique
  • the third generation (3rd Generation, 3G) mobile communication system has great features such as high bandwidth, multi-service, and high shield. Attracting the consumer market.
  • Session Initiation Protocol SIP is a standard for voice over IP (VoIP) issued by the Internet Engineering Task Force (INTERNET ENGINEERING TASK FORCE, IETF) in March 1999.
  • VoIP voice over IP
  • SIP adds requirements for telephony signaling and Quality of Service (QoS), and has unique user addressing and positioning capabilities.
  • QoS Quality of Service
  • SIP is a protocol for telephone signaling, used to initiate a session, can control the establishment and termination of multimedia sessions attended by multiple participants, and can dynamically adjust and modify session attributes: such as session bandwidth requirements, transmission media types (voice, video, Data, etc.), media codec format, support for multicast and unicast, etc. Therefore, SIP facilitates the development of value-added services for a variety of applications in conjunction with the Internet.
  • IP Multimedia Subsystem with SIP as a Service Control Protocol IP Multimedia
  • IMS is a third-generation mobile communication partner project (3rd Generation Partnership Project, "3GPP") that superimposes a subsystem on a packet network, using a packet domain as its bearer for control signaling and media transmission.
  • 3GPP Third Generation Partnership Project
  • Channel using SIP single, easy to expand, media group Convenient features provide a rich multimedia service by separating service control from bearer control.
  • the network structure of the IMS is shown in Figure 1.
  • CSCF Call Session Control Function
  • MGCF Media Gateway Control Function
  • IMS IMS Media Gateway
  • IMS-MGW IMS Media GateWay, "IMS-MGW”, Multimedia Resource Function Controller (MRFC,), Multimedia Resource Function Processor (MRFP), and egress gateway control Functional functions such as the Breakout Gateway Control Function (BGCF) and the IMS Application Server ("AS”) and the Home Subscriber Server (HSS).
  • BGCF Breakout Gateway Control Function
  • AS IMS Application Server
  • HSS Home Subscriber Server
  • CSCF is the core of the whole network, and supports SIP protocol to process SIP sessions. It is also divided into CSCF (Interrogating-CSCF, referred to as "I-CSCF”) and service CSCF (Serving-CSCF, referred to as "S-CSCF,”).
  • I-CSCF Interrogating-CSCF
  • S-CSCF Service CSCF
  • the CSCF Proxy CSCF, referred to as "P-CSCF”
  • P-CSCF is the access point of the User Equipment (“UE") to the IMS system, and implements the functions of the proxy (Proxy) and the user agent (User Agent) in the SIP protocol.
  • MGCF and IMS-MGW are functional entities interworking with the CS domain and the PSTN, respectively responsible for control signaling and media stream interworking;
  • MRFC and MRFP are functional entities that implement multi-party conferencing, and the MRFC of the control plane controls the MRFP through H.248;
  • the BGCF is the demarcation point between the IMS domain and the external network. It chooses where to connect to the CS domain or interconnect.
  • the services are uniformly provided by the application server AS, and the session control is performed by the S-CSCF.
  • the two are completely separated in the network structure.
  • the service is triggered by the S-CSCF through the subscription rules to the AS, and multiple ASs can work together.
  • the IMS user accesses the IMS through the visited domain node P-CSCF at the current location.
  • the session and service control are always completed by the home domain node where the subscription is located.
  • the session control and service control functions of the IMS are independent of the access.
  • the IMS user subscription data is centrally managed in the HSS.
  • the IMS communicates with the fixed network circuit domain through the media gateway control node MGCF: that is, the IMS domain user and the fixed network circuit domain user can call each other.
  • the S-CSCF when the S-CSCF receives the request message of the AS, it is responsible for the registration authentication and session control of the UE, and performs basic active routing function for the calling end and the called end IMS user, and triggers according to the IMS signed by the user. Rules that trigger related services of the AS.
  • S-CSCF When receiving the request message of the AS is a message requesting a media resource, there is no specific implementation manner for how to route the request message to the corresponding multimedia resource function controller MRFC. Summary of the invention
  • the embodiment of the invention provides a method and a device for transmitting a request message in a multimedia system, so that the request message of the AS can be routed to the specified network element.
  • An embodiment of the present invention provides a method for transmitting a request message in a multimedia system, including: when a service call session control function entity receives a request message, if the request message satisfies a preset condition, the request message is forwarded according to a routing manner of the SIP message. ;
  • An embodiment of the present invention provides an apparatus for implementing request message transmission in a multimedia system, including a transceiver module for performing information interaction with other network entities, and a matching module for performing initial filtering criteria matching on the request message received by the transceiver module. , Also includes:
  • a determining module configured to: when the receiving and receiving module receives the request message, determine whether the request message satisfies a preset condition, and if the preset condition is met, instruct the sending and receiving module to forward the request message according to a routing manner of the SIP message .
  • the embodiment of the present invention further provides another device for implementing the message transmission in the SIP multimedia system, including:
  • a receiving module configured to receive a request message
  • a sending module configured to send the received request message
  • a determining module configured to determine whether the request message meets a preset condition
  • a matching module that performs initial filtering criteria matching on the request message
  • the sending module sends the request message according to a routing manner of the SIP message
  • the matching module When the request message does not satisfy the preset condition, the matching module performs initial filtering criterion matching on the request message.
  • the S-CSCF entity determines whether the received request message satisfies the preset condition, and if yes, directly sends the request message to the corresponding network element, therefore, the S-CSCF The entity does not need to match the initial filtering criteria when it receives the message that only needs to be routed, triggers the related services of the AS, so that the request message of the AS can be successfully routed.
  • the repeated judgment of the received request message is avoided, the operation is simplified, and the system performance is improved.
  • FIG. 1 is a network structure diagram of an IMS according to the prior art
  • FIG. 2 is a flow chart showing a method of transmitting a request message in a SIP multimedia system according to a first embodiment of the present invention
  • FIG. 3 is a schematic flow chart of the S-CSCF entity receiving the request message and the MRFC address in the request address being in the same network domain according to the first embodiment of the present invention
  • FIG. 4 is a flow chart showing that an S-CSCF entity that receives a request message and an MRFC address within a request address are located in different network domains according to the first embodiment of the present invention
  • FIG. 5 is a schematic diagram showing the structure of an S-CSCF entity in a fourth embodiment of the present invention. detailed description
  • the SIP multimedia system is an MS.
  • the flow of the request message transmission method in the SIP multimedia system in the first embodiment of the present invention includes:
  • Step 210 When the S-CSCF entity of the IMS receives the request message sent from the AS to the MRFC, it determines whether the request message is the first time to visit the message of the S-CSCF entity. Specifically, when the S-CSCF entity of the IMS receives the request message from the AS, first check whether the highest entry of the "Route" header field in the request message has an original session identifier, and if so, the S-CSCF entity The request message has been received before, and the process proceeds to step 220. If it does not exist, it is determined that the request message is the first time to visit the S-CSCF entity, and the process proceeds to step 230.
  • Step 220 Perform subsequent processing on the request message according to the prior art
  • Step 230 The S-CSCF entity further determines whether the request message is a message requesting a media resource. Specifically, a request identifier is defined in advance, and the S-CSCF entity determines whether the request message is a message requesting a media resource by checking whether the request message includes a predefined request identifier.
  • the request message includes a predefined request identifier, determining that the message is a message requesting a media resource, proceed to step 240; otherwise, indicating that the message is a message requesting a service,
  • the initial filtering criterion of the user subscription data corresponding to the calling party and the called party is matched to the request message, and the related AS service is triggered, which is the same as the prior art, and details are not described herein again.
  • the S-CSCF entity Since the step 230 is performed after the step 210, the S-CSCF entity only judges the request message of the first access to the S-CSCF entity, and avoids whether the S-CSCF entity requests the media resource for the received request message. The repeated judgment of the message simplifies the operation and improves the system performance.
  • Step 240 The S-CSCF entity determines that the received request message is a message requesting the media resource, and therefore, the S-CSCF entity ignores the matching of the initial filtering criteria of the corresponding user subscription data in the request message, and the request message is forwarded to the corresponding MRFC.
  • the S-CSCF entity is prevented from performing the initial filtering criterion matching when receiving the message requesting the media resource, triggering the related service of the AS, so that the request message of the AS can be smoothly routed to the MRFC.
  • the S-CSCF entity determines, according to the request address in the request message, whether the S-CSCF entity is located in the same network domain as the MRPC address in the request address, and if yes, the forwarding manner of the request message is as shown in the figure. As shown in FIG. 3, the S-CSCF entity sends the request message to the corresponding MRFC through the MR interface between the S-CSCF entity and the MRFC according to the MRFC address in the request address.
  • the forwarding manner of the request message is as shown in FIG.
  • the S-CSCF1 in the calling network obtains the I-CSCF2 address in the called network domain through the request address in the request message, and routes the request message to the I-CSCF2.
  • the S-CSCF2 of the called network is determined by the I-CSCF through various combination conditions, and the request message is routed to the S-CSCF2.
  • the S-CSCF2 determines the request message as the message requesting the media resource, the initial filter criterion matching of the request message is ignored, and according to the MRFC address in the request address, the Mr interface between the S-CSCF entity and the MRPC is The request message is sent to the corresponding MRFC.
  • the manner in which the S-CSCF2 determines whether the request message is a request for a media resource message is the same as that of the S-CSCF1, and is not described here.
  • the initial filtering criterion of the corresponding user subscription data is matched to the request message, and the related AS service is triggered, which is the same as the prior art, and details are not described herein again.
  • the method for transmitting a request message in the SIP multimedia system of the second embodiment of the present invention is substantially the same as that of the first embodiment, except that in the first embodiment, the S-CSCF entity passes the view.
  • the request message includes a pre-defined request identifier to determine whether the request message is a message requesting a media resource.
  • the S-CSCF entity determines whether the request message includes a predetermined MRFC address. Whether the request message is a message requesting a media resource. If the request address of the request message includes the MRFC address in the address list, determine that the request message is a message requesting a media resource; or, save all available MRFC addresses in an external database, and the S-CSCF entity passes the query.
  • the external database determines whether the MRCC address is included in the request address of the request message. If it is determined that the received request message is a message requesting a media resource, the initial filtering criterion matching of the request message is ignored, and the request message is forwarded to the corresponding MRFC according to the routing method of the SIP message.
  • a specific identifier is set in the subscription data of the user in advance, and the S-CSCF entity checks whether the specific identifier is included in the subscription data of the user who sends the request message, and if so, ignores the request message.
  • the initial filtering criteria are matched, and the request message is forwarded to the corresponding network element according to the routing method of the SIP message.
  • the S-SCCF can be used as a router to transfer all the request messages of a specific user to a specific network element processing, thereby being more flexible in service implementation.
  • the condition is set in advance, and the S-CSCF entity checks whether the preset condition is satisfied in the subscription data of the user who sends the request message;
  • the initial filtering criterion match for the request message is ignored, and the request message is forwarded to the corresponding network element according to the routing method of the SIP message. Specifically include:
  • Step 310 After determining that the received request message is a visit to the current S-CSCF entity, the S-CSCF entity determines whether the request message satisfies a preset condition.
  • the preset condition includes that the request message includes a predefined special identifier, and the user subscribes to the request.
  • the data includes a pre-defined special identifier, and whether the request address of the request message includes at least one of the specific addresses. If the message is determined to be a message satisfying the preset condition, the process proceeds to step 320; otherwise, the process proceeds to step 330.
  • the S-CSCF entity Since the S-CSCF entity only judges the request message of the first access to the S-CSCF entity, the S-CSCF entity avoids the repeated judgment of whether the received request message satisfies the preset condition message, simplifies the operation, and improves the system. performance.
  • Step 320 because the S-CSCF entity determines that the received request message satisfies the preset condition, In this way, the S-CSCF entity ignores the matching of the initial filtering criteria of the corresponding user subscription data in the request message, and the request message is forwarded to the corresponding MRFC.
  • the S-CSCF entity is prevented from performing initial filtering criteria matching when receiving any request message, triggering related services of the AS, so that the AS request message can be smoothly routed to the MRJFC.
  • Step 330 Perform the initial filtering criterion matching of the corresponding user subscription data on the request message, and trigger the related AS service, which is the same as the prior art, and details are not described herein again.
  • An apparatus 500 for implementing request message transmission in a multimedia system may be an S-CSCF entity, as shown in FIG. 5, including a transceiver module 501 for performing information interaction with other network entities, a matching module 502 for performing initial filtering criterion matching on the request message received by the transceiver module, and a determining module 503, configured to determine, when the transceiver module 501 receives the request message, whether the request message satisfies a preset condition, and if And instructing the transceiver module to instruct the matching module 502 to ignore the initial filtering criteria match for the request message and forward the request message to the corresponding MRFC.
  • the determining module 503 determines whether the request message is a message that satisfies the preset condition, according to whether the request message includes a predefined request identifier or whether the request address of the request message includes a predetermined address.
  • the embodiment of the invention further provides an apparatus for implementing request message transmission in a SIP multimedia system, including:
  • a receiving module configured to receive a request message
  • a sending module configured to send the received request message
  • a determining module configured to determine whether the request message meets a preset condition
  • a matching module that performs initial filtering criteria matching on the request message
  • the sending module sends the request message according to a routing manner of the SIP message
  • the matching module When the request message does not satisfy the preset condition, the matching module performs initial filtering criterion matching on the request message.
  • the preset condition is that the request message includes a predefined identifier
  • the preset condition is that the user subscription data includes a predefined identifier; or the preset condition is that the request address of the request message includes a predetermined address.
  • the storage medium such as a ROM/RAM, a magnetic disk, a optical disk, or the like.
  • the present invention is not limited to the MRFC, and the present invention can be used as long as the request message that needs to be routed by the S-CSCF entity is not required to perform initial filtering criterion matching. Program.
  • the S-CSCF entity determines whether the received request message satisfies the preset condition, and if yes, directly sends the request message to the corresponding network element. Therefore, the S-CSCF entity avoids matching according to the initial filtering criteria when receiving the message that only needs to be routed, and triggers the related service of the AS, so that the request message of the AS can be smoothly routed to the corresponding network element, thereby avoiding receiving the message.
  • the repeated judgment of the request message simplifies the operation and improves the system performance.

Description

多媒体系统中请求消息的传输方法及装置 本申请要求于 2006 年 06 月 23 日提交中国专利局、 申请号为 200610093911.9、 发明名称为 "SIP多媒体系统中请求消息的传输方法及设 备" 的中国专利申请的优先权， 其全部内容通过引用结合在本申请中。 技术领域
本发明涉及通信技术领域， 特别涉及多媒体系统中请求消息的传输方 法及装置。 背景技术
随着通信技术的突飞猛进， 人们对于通信的期望和要求也越来越高， 第三代 (3rd Generation, 简称" 3G")移动通信系统的高带宽、 多业务、 高盾量 等特点极大的吸引着消费市场。
在 3G网络架构中， 随着分组技术的不断成熟， 基于电路交换的传统电 信网络正在向着基于分组交换的宽带电信网发展， 其中， 使用会话发起协 议 ( Session Initation Protocol , 简称" SIP" )协议作为分组电信核心网的呼叫 控制信令是当前的技术发展趋势之一。
会话发起协议 SIP是互联网工程任务组 ( INTERNET ENGINEERING TASK FORCE,筒称" IETF" )于 1999年 3月发布的一种分组语音（ Voice over IP, 简称" VoIP" ) 的标准。 SIP将电话作为因特网的一个重要应用， 增加了 电话信令和服务质量（Quality of Service, 简称" QoS" )等方面的要求， 并 具有独特的用户寻址与定位的功能。近来 SIP的实际作用已远远超出了 VoIP 的应用。 SIP是电话信令的协议， 用于发起会话， 能控制多个参与者参加的 多媒体会话的建立和终结， 并能动态调整和修改会话属性： 如会话带宽要 求、 传输媒体类型 (语音、 视频、 数据等)、 媒体的编解码格式、 对多播和单 播的支持等等。 因此， SIP有利于与因特网结合开发多种应用的增值服务。
以 SIP 协议作为业务控制协议的 ΊΡ 多媒体子系统 ( IP Multimedia
Subsystem, 简称" IMS" )是第三代移动通信合作伙伴项目 ( 3rd Generation Partnership Project, 筒称" 3GPP" )在分组网络上叠加一个子系统， 采用分组 域为其控制信令和媒体传输的承载通道， 利用 SIP 筒单、 易扩展、 媒体組 合方便的特点， 通过将业务控制与承载控制分离， 提供丰富的多媒体业务。 IMS 的网絡结构如图 1 所示， 包含呼叫会话控制功能（Call Session Control Function,筒称" CSCF，）、媒体网关控制功能（ Media Gateway Control Function, 简称" MGCF" )、 IMS媒体网关 （ IMS - Media GateWay , 筒称 "IMS-MGW" )、 多媒体资源功能控制器 （Multimedia Resource Function Controller, 简称" MRFC，，）、 多媒体资源功能处理器 （ Multimedia Resource Function Processor, 简称" MRFP" )、 出口网关控制功能 ( Breakout Gateway Control Function, 筒称" BGCF" ), 及 IMS应用服务器（ Application Server, 简称" AS" )和归属用户服务器（ Home Subscriber Server, 筒称 "HSS" )等功 能实体。
其中 CSCF是整个网絡的核心， 支持 SIP协议处理 SIP会话， 又分为询 问 CSCF( Interrogating-CSCF,简称 "I-CSCF" )和服务 CSCF ( Serving-CSCF , 简称" S-CSCF，，）。 代理 CSCF ( Proxy CSCF, 简称" P - CSCF" )是用户设备 ( User Equipment, 简称" UE" )接入 IMS系统的入口， 实现了在 SIP协议 中的代理（ Proxy )和用户代理 ( User Agent )功能； MGCF和 IMS - MGW 是与 CS域和 PSTN互通的功能实体， 分别负责控制信令和媒体流的互通； MRFC和 MRFP是实现多方会议的功能实体，控制层面的 MRFC通过 H.248 控制 MRFP; BGCF是 IMS域与外部网络的分界点， 它选择在哪里跟 CS域 或 互联。
在 IMS中，业务由应用服务器 AS统一提供,会话控制由 S-CSCF完成， 两者在网络结构上完全分离，业务由 S-CSCF通过签约规则触发至 AS处理， 多个 AS 间可以协同工作。 IMS 用户通过当前位置所在地的拜访域节点 P-CSCF接入 IMS, 会话和业务控制总由其签约所在地的归属域节点完成， IMS 的会话控制和业务控制功能与接入无关。 IMS的用户签约数据集中在 HSS中管理。 IMS通过媒体网关控制节点 MGCF实现和固网电路域的互通 呼叫： 即 IMS域用户和固网电路域用户之间 , 可以相互的呼叫对方。
目前， 当 S-CSCF接收到 AS的请求消息时， 负责对 UE的注册鉴权和 会话控制， 执行针对主叫端及被叫端 IMS用户的基本会活路由功能， 并根 据用户签约的 IMS触发规则， 触发 AS的相关业务。 然而， 如果 S-CSCF 接收到 AS的请求消息是请求媒体资源的消息时，对于如何将该请求消息路 由到相应的多媒体资源功能控制器 MRFC , 并没有明确的具体实施方案。 发明内容
本发明实施例提供一种多媒体系统中请求消息的传输方法及装置， 使 得 AS的请求消息可以路由至指定的网元中。
本发明实施例提供一种多媒体系统中请求消息的传输方法， 包括： 服务呼叫会话控制功能实体收到请求消息时， 如果该请求消息满足预 置条件， 则按照 SIP消息的路由方式转发该请求消息；
否则对该请求消息进行初始过滤准则匹配。
本发明实施例提供一种实现多媒体系统中请求消息传输的装置， 包括 用于与其他网络实体进行信息交互的收发模块， 和用于对收发模块收到的 请求消息进行初始过滤准则匹配的匹配模块， 还包括：
判断模块， 用于在所述收发模块收到请求消息时， 判断该请求消息是否满 足预置条件， 若满足所述预置条件， 则指示所述收发模块按照 SIP 消息的 路由方式转发该请求消息。
本发明实施例还提供另一种实现 SIP 多媒体系统中倩求消息传输的装 置， 包括：
接收模块， 用于接收请求消息；
发送模块， 用于发送所接收的请求消息；
判断模块， 用于判断所述请求消息是否满足预置条件；
匹配模块， 对请求消息进行初始过滤准则匹配；
在所述请求消息满足预置条件时， 所述发送模块按照 SIP 消息的路由 方式发送所述请求消息；
在该请求消息不满足预置条件时， 所述匹配模块对所述请求消息进行 初始过滤准则匹配。
本发明实施例提供的技术方案中,通过 S-CSCF实体对接收到的请求消 息是否满足预置条件进行判断， 如果是， 则直接将该请求消息发送至相应 的网元， 因此， S-CSCF实体在接收到只需要路由的消息时不需按照初始过 滤准则进行匹配， 触发 AS的相关业务， 使得 AS的请求消息可以顺利路由 到相应的网元中， 避免对收到的请求消息的重复判断， 筒化了操作， 提高 了系统性能。
附图说明
图 1是根据现有技术中 IMS的网络结构图；
图 2是根据本发明第一实施例的 SIP多媒体系统中请求消息的传输方 法流程图；
图 3是根据本发明第一实施例中收到请求消息的 S-CSCF实体与请求地 址内的 MRFC地址位于同一网络域的流程示意图；
图 4是根据本发明第一实施例中收到请求消息的 S-CSCF实体与请求地 址内的 MRFC地址位于不同网络域的流程图；
图 5是根据本发明第四实施例中的 S-CSCF实体结构示意图。 具体实施方式
为使本发明的目的、 技术方案和优点更加清楚， 下面将结合附图对本 发明作进一步地详细描述。
在本发明的实施例中， SIP多媒体系统为 MS。
如图 2所示， 本发明的第一实施例中 SIP多媒体系统中请求消息的传 输方法流程包括：
步骤 210,当 IMS的 S-CSCF实体接收到来自 AS的发送到 MRFC的请 求消息时， 判断该请求消息是否为第一次拜访本 S-CSCF实体的消息。具体 地说， 当 IMS的 S-CSCF实体接收到来自 AS的请求消息时，首先查看该请 求消息中" Route"头域的最高项是否存在原始对话标识， 如果存在， 则说明 本 S-CSCF实体之前已接收过该请求消息， 进入步驟 220, 如果不存在， 则 判定该请求消息为第一次拜访本 S-CSCF实体， 进入步骤 230。
步驟 220, 按现有技术对该请求消息进行后续处理；
步骤 230, S-CSCF实体进一步判断该请求消息是否为请求媒体资源的 消息。 具体地说， 预先定义一个请求标识， S-CSCF实体通过查看该请求消 息中是否包含预先定义的请求标识， 来判断该请求消息是否为请求媒体资 源的消息。 如果该请求消息中包含预先定义的请求标识， 则判定该消息为 请求媒体资源的消息，进入步骤 240;否则，表示该消息为请求业务的消息， 进入步骤 250,对该请求消息进行主叫和被叫对应的用户签约数据的初始过 滤准则匹配， 触发相关的 AS业务， 与现有技术相同， 在此不再赘述。
由于步骤 230是在步驟 210之后再执行的，因此 S-CSCF实体仅对初次 拜访本 S-CSCF实体的请求消息进行了判断，避免了 S-CSCF实体对收到的 请求消息是否为请求媒体资源消息的重复判断， 简化了操作， 提高了系统 性能。
步骤 240, 由于 S-CSCF实体判定收到的请求消息为请求媒体资源的消 息， 因此， S-CSCF实体忽略该请求消息中对应的用户签约数据的初始过滤 准则的匹配，该请求消息转发至相应的 MRFC。避免了 S-CSCF实体在接收 到请求媒体资源的消息时仍然进行初始过滤准则匹配， 触发 AS 的相关业 务， 使得 AS的请求消息可以顺利路由到 MRFC中。 具体地说， S-CSCF实 体根据该请求消息中的请求地址判断本 S-CSCF 实体是否与该请求地址内 的 MRPC地址位于同一个网络域， 如果是， 则该请求消息的转发方式， 如 图 3所示， S-CSCF实体根据该请求地址内的 MRFC地址， 通过 S-CSCF实 体与 MRFC间的 Mr接口将该请求消息发送至相应的 MRFC。
如果 S-CSCF实体与该请求地址内的 MRFC地址位于不同的网络域， 则该请求消息的转发方式， 如图 4所示。 主叫网络内的 S-CSCF1接收到来 自 AS的请求媒体资源的消息后，通过该请求消息内的请求地址获得被叫网 络域内的 I-CSCF2地址， 并将该请求消息路由至 I-CSCF2。 由 I-CSCF通过 各种组合条件决定被叫网络的 S-CSCF2,并将该请求消息路由至 S-CSCF2。 由 S-CSCF2在将该请求消息判定为请求媒体资源的消息后， 忽略该请求消 息的初始过滤准则匹配，并根据该请求地址内的 MRFC地址，通过 S-CSCF 实体与 MRPC 间的 Mr接口将该请求消息发送至相应的 MRFC。 其中， S-CSCF2 判断该请求消息是否为请求媒体资源消息的方式与 S- CSCF1 相 同， 在此不再赘述。
步骤 250, 对该请求消息进行对应的用户签约数据的初始过滤准则匹 配， 触发相关的 AS业务， 与现有技术相同， 在此不再赘述。
本发明的第二实施例的 SIP 多媒体系统中请求消息的传输方法与第一 实施例大致相同， 其区别仅在于， 在第一实施例中， S-CSCF实体通过查看 请求消息中是否包含预先定义的请求标识， 来判断该请求消息是否为请求 媒体资源的消息， 而在本实施例中， S-CSCF实体通过查看请求消息中是否 包含预定的 MRFC的地址，来判断该请求消息是否为请求媒体资源的消息。 中， 如果该请求消息的请求地址中包含该地址列表中的 MRFC地址， 则判 定该请求消息为请求媒体资源的消息； 或者， 在外部数据库中保存所有可 用的 MRFC地址， S-CSCF实体通过查询该外部数据库，来判断该请求消息 的请求地址中是否包含 MRFC地址。 若判定收到的请求消息为请求媒体资 源的消息， 则忽略对该请求消息的初始过滤准则匹配， 并按照 SIP 消息的 路由方法将该请求消息转发到相应的 MRFC。
本发明的第三实施例中， 预先在用户的签约数据中设置特定标识， S-CSCF 实体通过检查发送请求消息的用户的签约数据中是否有该特定标 识， 如果有， 则忽略对该请求消息的初始过滤准则匹配， 并按照 SIP 消息 的路由方法将该请求消息转发到相应的网元。
通过这种方式可以将 S-SCCF作为一个路由器使用，将特定用户的请求 消息全部转移到特定的网元处理， 从而在业务实现时更为灵活。
本发明第四实施例中， 预先设置条件， S-CSCF实体通过检查发送请求 消息的用户的签约数据中是否满足所述预置条件；
如果满足预置条件， 则忽略对该请求消息的初始过滤准则匹配， 并按 照 SIP消息的路由方法将该请求消息转发到相应的网元。 具体包括：
步驟 310, 在判定接收的请求消息为笫一次拜访本 S-CSCF 实体， S-CSCF实体判断该请求消息是否满足预置条件， 通常预置条件包括请求消 息内包含预先定义的特殊标识、 用户签约数据中包含预先定义的特殊标识、 请求消息的请求地址中是否包含特定的地址中至少之一， 若判定该消息为 满足预置条件的消息， 则进入步骤 320; 否则， 进入步骤 330。
由于 S-CSCF 实体仅对初次拜访本 S-CSCF 实体的请求消息进行了判 断，避免了 S-CSCF实体对收到的请求消息是否满足预置条件消息的重复判 断， 简化了操作， 提高了系统性能。
步驟 320, 由于 S-CSCF实体判定收到的请求消息为满足预置条件， 因 此， S-CSCF实体忽略该请求消息中对应的用户签约数据的初始过滤准则的 匹配，该请求消息转发至相应的 MRFC。避免了 S-CSCF实体在接收到任何 请求消息时都进行初始过滤准则匹配， 触发 AS的相关业务， 使得 AS的倩 求消息可以顺利路由到 MRJFC中。
步骤 330, 对该请求消息进行对应的用户签约数据的初始过滤准则匹 配， 触发相关的 AS业务， 与现有技术相同， 在此不再赘述。
本发明第五实施例中的一种实现多媒体系统中请求消息传输的装置 500, 可以是 S-CSCF实体， 如图 5所示， 包含用于与其他网络实体进行信 息交互的收发模块 501，用于对该收发模块收到的请求消息进行初始过滤准 则匹配的匹配模块 502, 以及判断模块 503 , 用于在该收发模块 501收到请 求消息时， 判断该请求消息是否满足预置条件， 如果是， 则指示该收发模 块指示该匹配模块 502 忽略对该请求消息的初始过滤准则匹配， 并将该请 求消息转发到相应的 MRFC。
其中， 判断模块 503根据该请求消息中是否包含预先定义的请求标识， 或者该请求消息的请求地址中是否包含预定的地址， 来判断该请求消息是 否为满足预置条件的消息。
本发明实施例还提供一种实现 SIP多媒体系统中请求消息传输的装置， 包括：
接收模块， 用于接收请求消息；
发送模块， 用于发送所接收的请求消息；
判断模块， 用于判断所述请求消息是否满足预置条件；
匹配模块， 对请求消息进行初始过滤准则匹配；
在所述请求消息满足预置条件时， 所述发送模块按照 SIP 消息的路由 方式发送所述请求消息；
在该请求消息不满足预置条件时， 所述匹配模块对所述请求消息进行 初始过滤准则匹配。
所述预置条件为请求消息中包含预先定义的标识； 或者，
所述预置条件为用户签约数据中包含预先定义的标识； 或者， 所述预置条件为请求消息的请求地址中包含预定地址。 本领域技术人员可以理解， 上述实施例中的全部或部分步骤是可以通 过程序来指令相关硬件来实现， 所述程序可存储于计算机可读取存储介质 中。
所述存储介质， 如 ROM/RAM、 磁盘、 光碟等。
以上各实施方式是以 MRFC为例进行说明的， 可以理解， 本发明并不 限于 MRFC, 只要是不希望进行初始过滤准则匹配， 只需要利用 S-CSCF 实体进行路由的请求消息都可以使用本发明的方案。
由上述实施例可知， 本发明实施例提供的技术方案中，通过 S-CSCF实 体对接收到的请求消息是否满足预置条件进行判断， 如果是， 则直接将该 请求消息发送至相应的网元， 因此， S-CSCF实体在接收到只需要路由的消 息时避免按照初始过滤准则进行匹配， 触发 AS的相关业务， 使得 AS的请 求消息可以顺利路由到相应的网元中， 避免了对收到的请求消息的重复判 断， 简化了操作， 提高了系统性能。
虽然通过参照本发明的某些优选实施方式， 已经对本发明进行了图示 和描述， 但本领域的普通技术人员应该明白， 可以在形式上和细节上对其 作各种改变， 而不偏离本发明的精神和范围。

Claims

权 利 要 求
1. 一种多媒体系统中请求消息的传输方法， 其特征在于， 包括： 服务呼叫会话控制功能实体收到请求消息时， 如果该请求消息满足预 置条件， 则按照 SEP消息的路由方式转发该请求消息；
否则对该请求消息进行初始过滤准则匹配。
2. 根据权利要求 1所述的传输方法， 其特征在于， 所述预置条件为请 求消息中包含预先定义的标识。
3. 根据权利要求 1所述的传输方法， 其特征在于， 所述预置条件为用 户签约数据中包含预先定义的标识。
4. 根据权利要求 1所述的传输方法， 其特征在于， 所述预置条件为请 求消息的请求地址中包含预定地址。
5. 根据权利要求 4所述的传输方法， 其特征在于， 所述预定地址预先 保存在所述服务呼叫会话控制功能实体的地址列表中。
6. 根据权利要求 4所述的传输方法， 其特征在于， 所述预定地址预先 保存在外部数据库中， 所述服务呼叫会话控制功能实体通过查询该外部数 据库， 判断所述请求消息的请求地址中是否包含所述预定地址。
7. 根据权利要求 4所述的传输方法， 其特征在于， 与所述预置条件相 对应的网元是媒体资源功能控制实体， 所述预定地址是媒体资源功能控制 实体的地址。
8. 一种实现多媒体系统中请求消息传输的装置， 包括用于与其他网络 实体进行信息交互的收发模块， 和用于对收发模块收到的请求消息进行初 始过滤准则匹配的匹配模块， 其特征在于， 还包括：
判断模块， 用于在所述收发模块收到请求消息时， 判断该请求消息是 否满足预置条件， 若满足所述预置条件， 则指示所述收发模块按照 SIP 消 息的路由方式转发该请求消息。
9. 根据权利要求 8所述的装置， 其特征在于， 所述预置条件为请求消 息中包含预先定义的标识； 或者，
所述预置条件为用户签约数据中包含预先定义的标识； 或者， 所述预置条件为请求消息的请求地址中包含预定地址。
10. 根据权利要求 8 所述的装置， 其特征在于， 如果所述判断模块判 定所述请求消息不满足所述预置条件， 则指示所述匹配模块对该请求消息 进行初始过滤准则匹配。
11. 一种实现 SIP多媒体系统中请求消息传输的装置， 其特征在于， 包 括：
接收模块， 用于接收请求消息；
发送模块， 用于发送所接收的请求消息；
判断模块， 用于判断所述请求消息是否满足预置条件；
匹配模块， 对请求消息进行初始过滤准则匹配；
在所述请求消息满足预置条件时， 所述发送模块按照 SIP 消息的路由 方式发送所述请求消息；
在该请求消息不满足预置条件时， 所述匹配模块对所述请求消息进行 初始过滤准则匹配。
12. 根据权利要求 11所述的装置， 其特征在于， 所述预置条件为请求 消息中包含预先定义的标识； 或者，
所述预置条件为用户签约数据中包含预先定义的标识； 或者， 所述预置条件为请求消息的请求地址中包含预定地址。
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EP2034688A4 (en) 2010-01-20
EP2034688A1 (en) 2009-03-11
CN100525256C (zh) 2009-08-05

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