WO2011157179A2 - 一种cs与lte共建组网的路由选择方法、装置和通信系统 - Google Patents

一种cs与lte共建组网的路由选择方法、装置和通信系统 Download PDF

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Publication number
WO2011157179A2
WO2011157179A2 PCT/CN2011/075325 CN2011075325W WO2011157179A2 WO 2011157179 A2 WO2011157179 A2 WO 2011157179A2 CN 2011075325 W CN2011075325 W CN 2011075325W WO 2011157179 A2 WO2011157179 A2 WO 2011157179A2
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user
called
call
routing
sri
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PCT/CN2011/075325
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English (en)
French (fr)
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WO2011157179A9 (zh
WO2011157179A3 (zh
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刘海洋
李靖
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华为技术有限公司
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Priority to CN2011800009710A priority Critical patent/CN102959919A/zh
Priority to PCT/CN2011/075325 priority patent/WO2011157179A2/zh
Publication of WO2011157179A2 publication Critical patent/WO2011157179A2/zh
Publication of WO2011157179A3 publication Critical patent/WO2011157179A3/zh
Publication of WO2011157179A9 publication Critical patent/WO2011157179A9/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/10Connection setup
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W48/00Access restriction; Network selection; Access point selection
    • H04W48/18Selecting a network or a communication service

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a routing method, apparatus, and communication system for a CS and LTE co-established networking.
  • CS Circuit Switched Domain
  • LTE Long Term Evolution
  • UE User Equipment
  • G/VMSC Gateway Mobile Switching Center, Gateway Mobile Switching Center; Visited Mobile- Services Switching Centre, access to the Mobile Switching Center
  • the called routing scheme from CS to IMS mainly includes:
  • GMSC Global Mobile Switching Center
  • HSS Home Subscriber Server
  • gsmSCF Global System for Mobile Communications Service Control Function, Global Mobile
  • IMRN IP Multimedia Route Number
  • the GMSC initiates a routing information request to the HSS for the SRI process, and the HSS obtains the IMRN from the IMS, and the GMSC routes to the IMS through the routing code IMRN.
  • the GMSC directly routes to the fixed MGCF (Media Gateway, Media Gateway Control Function) entity. Routed by MGCF to IMS.
  • MGCF Media Gateway, Media Gateway Control Function
  • the prior art routing scheme needs to increase the number prefix, requires the number length, and the routing method is extended and the efficiency is low.
  • SUMMARY OF THE INVENTION The present invention provides a routing method for a CS and LTE co-established networking, which does not change the initial called number, and guarantees the subscription and configuration of the called party, in view of the shortcomings of the routing method in the prior art.
  • the business can trigger normally.
  • the embodiment of the present invention provides a route processing method for a CS and LTE co-established networking, including: receiving, by the GMSC, an IAM incoming signaling message; sending an SRI message to the HLR/HSS; receiving the HLR (Home Location Regiser, attribution) The SRI ACK message returned by the location register) /HSS; the call routing is performed according to the user identification cell in the SRI ACK message for identifying whether the called user is an IMS user.
  • the embodiment of the present invention provides a gateway mobile switching center, including: a first receiving module, configured to receive an IAM incoming signaling message; a sending module, configured to send an SRI message to the HLR/HSS; The SLR ACK message returned by the HLR/HSS; the routing module performs call routing according to the user identification cell used to identify whether the called user is an IMS user in the SRI ACK message received by the second receiving module.
  • the embodiment of the present invention provides a CS and LTE co-establishment networking system, including a GMSC, an HLR/HSS, where the GMSC is configured to receive an IAM incoming signaling message, and send an SRI message to the HLR/HSS.
  • a GMSC receives an IAM incoming signaling message, and sends an SRI message to the HLR/HSS.
  • Receiving an SRI ACK message returned by the HLR/HSS performing call routing according to the user identification cell in the SRI ACK message for identifying whether the called user is an IMS user; the HLR/HSS is used for
  • the GMSC returns the SRI ACK message.
  • the GMSC selects the route of the called user according to the called user identifier, reduces the called route delay, and does not change the initial called number during the routing process. Ensure that the called contract and configured services can be triggered normally, improving routing efficiency.
  • 1 is a flowchart of a first embodiment of a routing method provided by the present invention
  • 2 is a flowchart of a second embodiment of a routing method provided by the present invention
  • FIG. 3 is a structural block diagram of an embodiment of a gateway mobile switching center apparatus provided by the present invention.
  • FIG. 6 is a structural diagram of an embodiment of a communication system provided by the present invention. detailed description
  • a first embodiment of the present invention provides a routing method for a CS and LTE co-established networking, where the method includes:
  • the GMSC receives an IAM incoming signaling message.
  • the SRI message sent by the GMSC to the HLR/HSS carries the called user identifier.
  • S104 Perform call routing according to the user identifier cell in the SRI ACK message that is used to identify whether the called user is an IMS user.
  • the user identification cell that identifies whether the called user is an IMS user may be a new cell or an extension of the existing cell, which is not limited in this embodiment of the present invention.
  • the ENUM Telephone Number Mapping
  • S-CSCF Service Call Session Control Function
  • the call is routed to the VMSC of the called user according to the obtained roaming number.
  • the user identity cell is returned to the GMSC through the SRI ACK message by the HLR/HSS, and the route of the called user is selected by the GMSC according to the called user identifier.
  • the called route is delayed, and during the routing process, the initial called is not changed. The number ensures that the called contract and configured services can be triggered normally.
  • the second embodiment of the present invention provides a routing method specifically used for the networking of the CS and the LTE. As shown in FIG. 2, the method includes:
  • the GMSC receives the IAM incoming signaling message.
  • the SRI message sent by the GMSC to the HLR/HSS carries the called user identifier.
  • S203 Receive an SRI ACK message returned by the HLR/HSS.
  • the SRI ACK message returned by the HLR/HSS includes the called user identifier, and the identifier is used to identify whether the called user is an IMS user.
  • the GMSC determines whether the called user is an IMS user according to the user identity cell, if the called user is an IMS user, then executing S206, if the called user is a non-IMS user, executing S205;
  • the GMSC After obtaining the roaming number from the HLR, the GMSC routes the call to the VMSC accessed by the called user according to the roaming number.
  • the ENUM server is a domain name server. After the called number is converted to a domain name, it can be converted to an IP address on the GMSC, or the domain name server can be converted to an IP address.
  • the GMSC routes the call to the S-CSCF according to the acquired IP address of the called user.
  • the S-CSCF sends, to the T-ADS (Terminal Access ADS, the called access domain selection function) entity, an acquisition request that includes the called user access domain information.
  • T-ADS Terminal Access ADS, the called access domain selection function
  • the T-ADS can record the current access domain information of the user, such as the user currently camping in the CS domain or camping in the LTE domain.
  • the S-CSCF performs routing according to the access domain information of the called user returned by the received T-ADS.
  • the S-CSCF learns that the called user accesses the LTE network
  • the S-CSCF routes the call to the P-CSCF (Proxy Call Session Control Function) according to the IP address information registered by the called user. Entity;
  • the S-CSCF learns that the called user accesses the CS network, the S-CSCF receives the T-ADS.
  • the obtained roaming number is routed to the MGCF according to the roaming number, and then further routed to the VMSC of the called user.
  • the user identity cell is returned to the GMSC through the SRI ACK message by the HLR/HSS, and the route of the called user is selected by the GMSC according to the called user identifier.
  • the called route is delayed, and the initial called number is not changed during the routing process to ensure that the called subscription and configured services can be triggered normally.
  • An embodiment of the present invention provides a GMSC, as shown in FIG. 3, including:
  • the first receiving module 301 is configured to receive an IAM incoming signaling message.
  • the sending module 302 is configured to send an SRI message to the HLR/HSS.
  • a second receiving module 303 the SRI ACK message returned by the HLR/HSS;
  • the routing module 304 performs call routing according to the user identification cell used to identify whether the called user is an IMS user in the SRI ACK message received by the second receiving module 303.
  • the routing module if the user identifier cell received by the routing module identifies that the called user is an IMS user, query the ENUM server, obtain the IP address of the called user, and then route the call to the S-CSCF; if the routing module receives The obtained user identification cell identifies that the called user is a non-IMS user, and routes the call to the VMSC of the called user according to the obtained roaming number.
  • the GMSC provided by the embodiment of the present invention selects the route of the called user according to the called user identifier to reduce the routing delay of the called party, and does not change the initial called number during the routing process to ensure the called subscription and configured services. Can trigger normally.
  • the embodiment of the present invention further provides a CS and LTE co-established networking system, as shown in FIG. 4, including GMSC 401 and HLR/HSS 402.
  • the GMSC 401 is configured to receive an IAM incoming signaling message, send an SRI message to the HLR/HSS 402, receive an SRI ACK message returned by the HLR/HSS 402, and use the SRI ACK message to identify whether the called user is an IMS user.
  • the user identification cell performs call routing; correspondingly, the HLR/HSS 402 is configured to return the SRI ACK message to the GMSC 401.
  • the GMSC 401 selects the route of the called user according to the called user identifier to reduce the called route delay, and does not change the initial called during the routing process. The number ensures that the called contract and configured services can be triggered normally.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

本发明实施例提供一种CS和LTE共建组网的路由处理方法,包括:GMSC接收IAM入局信令信息(S101),向HLR/HSS发送SRI消息(S102),接收所述HLR/HSS返回的SRIACK消息(S103),根据所述SRIACK消息中用于标识被叫用户是否为IMS用户的用户标识信元,进行呼叫路由选择(S104)。相应地,本发明实施例还提供一种网关移动交换中心和CS和LTE共建组网系统,能够减少被叫路由时延,并且在路由过程中,不改变初始被叫号码,保证被叫签约和配置的业务能够正常触发。

Description

一种 CS与 LTE共建组网的路由选择方法、 装置和通信系统 技术领域
本发明涉及通信技术领域, 特别涉及一种用于 CS与 LTE共建组网的路由 选择方法、 装置和通信系统。 说
背景技术
在 CS(Circuit SwitchedDomain, 电路交换域)与 LTE ( Long Term Evolution, 长期演进)共建时, UE ( User Equipment, 用书户设备)作为被叫, 整个网络统 一编址时, CS和 LTE用户不能通过号段筒单区分出来, 现有技术中, 智能锚 定效率 4艮低, 而 ICS ( Internet Connection Sharing, 因特网连接共享) 架构对 G/VMSC ( Gateway Mobile Switching Center , 网关移动交换中心; Visited Mobile-Services Switching Centre, 访问移动交换中心) 的升级改造影响较大, 如功能方面及代码方面。
现有技术中, 从 CS到 IMS ( IP多媒体子系统, IP Multimedia Subsystem ), 的被叫路由方案主要包括:
1、 智能锚定的方式: GMSC ( Gateway Mobile Switching Center , 网关移 动交换中心)从 HSS ( Home Subscriber Server, 归属用户服务器)获取智能信 息 , 通过到 gsmSCF ( Global System for Mobile Communications Service Control Function, 全球移动通信系统业务控制功能) 实体触发智能的方式获取到 IMS 的路由码 IMRN ( IP Multimedia Route Number , 多媒体路由号码)。
2、 GMSC发起到 HSS的路由信息请求 SRI流程, HSS到 IMS获取 IMRN, GMSC通过路由码 IMRN路由到 IMS。
3、 GMSC直接路由到固定的 MGCF ( Media Gateway,媒体网关控制功能)实 体。 由 MGCF路由到 IMS。
现有技术的路由方案需要增加号码前缀, 对号码长度有要求, 而且路由方 法时延长, 效率低。 发明内容 鉴于现有技术中路由方法时延长, 效率低的缺陷, 本发明实施例提供了一 种 CS与 LTE共建组网的路由方法, 不改变初始被叫号码, 保证被叫签约和配 置的业务能够正常触发。
一方面, 本发明实施例提供一种 CS和 LTE共建组网的路由处理方法, 包 括: GMSC接收 IAM入局信令消息; 向 HLR/HSS发送 SRI消息; 接收所述 HLR ( Home Location Regiser, 归属位置寄存器 ) /HSS返回的 SRI响应消息 SRI ACK消息; 根据所述 SRI ACK消息中用于标识被叫用户是否为 IMS用户 的用户标识信元, 进行呼叫路由选择。
另一方面, 本发明实施例提供一种网关移动交换中心, 包括: 第一接收模 块,用于接收 IAM入局信令消息;发送模块,用于向 HLR/HSS发送 SRI消息; 第二接收模块, 所述 HLR/HSS返回的 SRI ACK消息; 路由选择模块, 根据所 述第二接收模块接收到的 SRI ACK消息中用于标识被叫用户是否为 IMS用户 的用户标识信元, 进行呼叫路由选择。
再一方面,本发明实施例提供一种 CS和 LTE共建组网系统,包括 GMSC、 HLR/HSS, 其中, 所述 GMSC, 用于接收 IAM入局信令消息, 向 HLR/HSS 发送 SRI消息; 接收所述 HLR/HSS返回的 SRI ACK消息; 根据所述 SRI ACK 消息中用于标识被叫用户是否为 IMS 用户的用户标识信元, 进行呼叫路由选 择; 所述 HLR/HSS , 用于向所述 GMSC返回所述 SRI ACK消息。
本发明实施例提供的方法, 装置和系统, 由 GMSC根据所述被叫用户标 识选择所述被叫用户的路由, 减少被叫路由时延, 并且在路由过程中, 不改变 初始被叫号码, 保证被叫签约和配置的业务能够正常触发, 提高了路由效率。 附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案, 下面将对实施 例或现有技术描述中所需要使用的附图作一筒单地介绍, 显而易见地, 下面描 述中的附图是本发明的一些实施例, 对于本领域普通技术人员来讲, 在不付出 创造性劳动性的前提下, 还可以根据这些附图获得其他的附图。
图 1为本发明提供的路由选择方法第一实施例流程图; 图 2为本发明提供的路由选择方法第二实施例流程图;
图 3为本发明提供的网关移动交换中心装置实施例结构框图;
图 6为本发明提供的通信系统实施例结构图。 具体实施方式
为使本发明实施例的目的、 技术方案和优点更加清楚, 下面将结合本发明 实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然, 所描述的实施例是本发明一部分实施例, 而不是全部的实施例。 基于本发明中 的实施例, 本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其 他实施例, 都属于本发明保护的范围。 如图 1所示, 本发明实施例一提供了一种用于 CS与 LTE共建组网的路由 方法, 该方法包括:
5101 , GMSC接收 IAM入局信令消息;
5102 , 向 HLR/HSS发送 SRI消息;
由 GMSC向 HLR/HSS发送的 SRI消息中携带被叫用户标识;
5103 , 接收 HLR/HSS返回的 SRI ACK消息;
5104, 根据所述 SRI ACK消息中用于标识被叫用户是否为 IMS用户的用 户标识信元, 进行呼叫路由选择。
这里, 标识被叫用户是否为 IMS用户的用户标识信元可以为新增的信元, 也可以为已有信元的扩展, 本发明实施例对此不作限制。
若所述用户标识信元标识被叫用户为 IMS用户, 则查询 ENUM ( Telephone Number Mapping ·, 电话号码映射)服务器, 获取被叫用户 IP地址进而将呼叫路由 到 S-CSCF ( Serve Call Session Control Function,服务呼叫会话控制功能)实体;
若所述用户标识信元标识被叫用户为非 IMS用户,则根据获取到的漫游号 码, 将呼叫路由到被叫用户的 VMSC。
本发明实施例 CS和 LTE网络共建的组网下, 通过 HLR/HSS将用户标识 信元通过 SRI ACK消息返回给 GMSC, 由 GMSC根据所述被叫用户标识选择 所述被叫用户的路由减少被叫路由时延, 并且在路由过程中, 不改变初始被叫 号码, 保证被叫签约和配置的业务能够正常触发。
本发明实施例二提供了一种具体用于 CS与 LTE共建组网的路由方法, 如 图 2所示, 包括:
5201 , GMSC接收 IAM入局信令消息
5202 , 向 HLR/HSS发送 SRI消息;
由 GMSC向 HLR/HSS发送的 SRI消息中携带被叫用户标识;
5203 , 接收 HLR/HSS返回的 SRI ACK消息;
这里, HLR/HSS返回的 SRI ACK消息中包含被叫用户标识, 该标识用于 标识被叫用户是否为 IMS用户;
5204, GMSC根据所述用户标识信元, 判断所述被叫用户是否为 IMS用 户, 如果所述被叫用户是 IMS用户则执行 S206, 如果所述被叫用户为非 IMS 用户, 则执行 S205;
5205, 路由到所述被叫用户接入的 VMSC后本流程结束;
这里, GMSC向 HLR获取漫游号码后, 根据漫游号码, 将呼叫路由到被 叫用户接入的 VMSC。
5206, 查询 ENUM服务器, 将呼叫路由到 S-CSCF;
ENUM服务器是一种域名服务器, 被叫号码转为域名后, 可以在 GMSC 上转为 IP地址, 也可以域名服务器上转为 IP地址。
GMSC根据获取的被叫用户 IP地址将呼叫路由到 S-CSCF。
5207, S-CSCF向 T- ADS ( Terminating ADS , 被叫接入域选择功能)实体发送 包含所述被叫用户接入域信息的获取请求;
T-ADS可以记录用户当前的接入域信息, 如用户当前驻留在 CS域, 或者 驻留在 LTE域。
5208 , S-CSCF根据接收到的 T-ADS返回的所述被叫用户的接入域信息, 进行路由选择。
这里, 若 S-CSCF获知被叫用户在 LTE网络接入, 则 S-CSCF根据所述被 叫用户注册的 IP地址信息将呼叫路由到 P-CSCF ( Proxy Call Session Control Function, 代理呼叫会话控制功能) 实体;
若 S-CSCF获知被叫用户在 CS网络接入, 则 S-CSCF接收所述 T-ADS获 取到的漫游号码, 根据漫游号码将呼叫路由到 MGCF, 然后进一步路由到被叫 用户的 VMSC。
本发明实施例 CS和 LTE网络共建的组网下, 通过 HLR/HSS将用户标识 信元通过 SRI ACK消息返回给 GMSC, 由 GMSC根据所述被叫用户标识选择 所述被叫用户的路由减少被叫路由时延, 并且在路由过程中, 不改变初始被叫 号码, 保证被叫签约和配置的业务能够正常触发。
本发明实施例提供一种 GMSC, 如图 3所示, 包括:
第一接收模块 301 , 用于接收 IAM入局信令消息;
发送模块 302 , 用于向 HLR/HSS发送 SRI消息;
第二接收模块 303 , 所述 HLR/HSS返回的 SRI ACK消息;
路由选择模块 304,根据所述第二接收模块 303接收到的 SRI ACK消息中 用于标识被叫用户是否为 IMS用户的用户标识信元, 进行呼叫路由选择。
这里, 若所述路由选择模块接收到的用户标识信元标识被叫用户为 IMS 用户,则查询 ENUM服务器,获取被叫用户 IP地址进而将呼叫路由到 S-CSCF; 若所述路由选择模块接收到的用户标识信元标识被叫用户为非 IMS用户,则根 据获取到的漫游号码, 将呼叫路由到被叫用户的 VMSC。
本发明实施例提供的 GMSC根据所述被叫用户标识选择所述被叫用户的 路由减少被叫路由时延, 并且在路由过程中, 不改变初始被叫号码, 保证被叫 签约和配置的业务能够正常触发。
本发明实施例还提供一种 CS和 LTE共建组网系统, 如图 4所示, 包括 GMSC401、 HLR/HSS402,
其中, GMSC401 ,用于接收 IAM入局信令消息,向 HLR/HSS402发送 SRI 消息; 接收所述 HLR/HSS402返回的 SRI ACK消息; 根据所述 SRI ACK消息 中用于标识被叫用户是否为 IMS用户的用户标识信元, 进行呼叫路由选择; 相应地, HLR/HSS402, 用于向所述 GMSC401返回所述 SRI ACK消息。 进一步地,若 GMSC401接收到的用户标识信元标识被叫用户为 IMS用户, 则查询 ENUM服务器, 获取被叫用户 IP地址进而将呼叫路由到 S-CSCF; 若 GMSC401接收到的用户标识信元标识被叫用户为非 IMS用户,则根据 获取到的漫游号码, 将呼叫路由到被叫用户的 VMSC。 本发明实施例提供的 CS和 LTE共建组网系统中, GMSC根据所述被叫用 户标识选择所述被叫用户的路由减少被叫路由时延, 并且在路由过程中, 不改 变初始被叫号码, 保证被叫签约和配置的业务能够正常触发。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程, 是可以通过计算机程序来指令相关的硬件来完成, 所述的程序可存储于一计算 机可读取存储介质中,该程序在执行时,可包括如上述各方法的实施例的流程。 其中,所述的存储介质可为磁碟、光盘、只读存储记忆体( Read-Only Memory , ROM )或随机存储记忆体(Random Access Memory, RAM )等。
最后应说明的是: 以上实施例仅用以说明本发明的技术方案, 而非对其限制; 尽管参照前述实施例对本发明进行了详细的说明, 本领域的普通技术人员应当 理解: 其依然可以对前述各实施例所记载的技术方案进行修改, 或者对其中部 分技术特征进行等同替换; 而这些修改或者替换, 并不使相应技术方案的本质 脱离本发明各实施例技术方案的精神和范围。

Claims

权 利 要 求 书
1、一种电路交换域 CS和长期演进 LTE共建组网的路由处理方法, 其特征 在于, 包括:
网关移动交换中心 GMSC接收访问管理的入局信令消息 IAM入局信令消 息;
向归属用户服务器 HLR/归属位置寄存器 HSS发送路由信息请求 SRI消息; 接收所述 HLR/HSS返回的所述 SRI响应消息 SRI ACK消息;
根据所述 SRI ACK消息中用于标识被叫用户是否为 IP多媒体子系统 IMS 用户的用户标识信元, 进行呼叫路由选择。
2、 根据权利要求 1所述的方法, 其特征在于,
若所述用户标识信元标识被叫用户为 IMS用户, 则查询电话号码映射服务 器 ENUM服务器,获取被叫用户 IP地址进而将呼叫路由到服务呼叫会话控制功 能 S-CSCF实体。
3、 根据权利要求 2所述的方法, 其特征在于, 所述方法进一步包括: S-CSCF向被叫接入域选择功能 T-ADS 实体发送包含所述被叫用户接入域 信息的获取请求;
S-CSCF根据接收到的 T-ADS返回的所述被叫用户的接入域信息, 进行路 由选择。
4、 根据权利要求 3所述的方法, 其特征在于, 所述 S-CSCF根据接收到的 T-ADS返回的所述被叫用户的接入域信息, 进行路由选择, 包括:
若所述被叫用户在 LTE网络接入, 则 S-CSCF根据所述被叫用户注册的 IP 地址信息将呼叫路由到代理呼叫会话控制功能 P-CSCF实体;
若所述被叫用户在 CS网络接入,则 S-CSCF接收所述 T-ADS获取到的漫游 号码, 根据漫游号码将呼叫路由到媒体网关控制功能 MGCF实体。
5、 根据权利要求 1所述的方法, 其特征在于,
若所述用户标识信元标识被叫用户为非 IMS用户, 则 ^据获取到的漫游号 码, 将呼叫路由到被叫用户的访问移动交换中心 VMSC。
6、 一种网关移动交换中心, 其特征在于, 包括: 第一接收模块, 用于接收访问管理的入局信令消息 IAM入局信令消息; 发送模块,用于向归属用户服务器 HLR/归属位置寄存器 HSS发送路由信息 请求 SRI消息;
第二接收模块, 所述 HLR/HSS返回的所述 SRI响应消息 SRI ACK消息; 路由选择模块, 根据所述第二接收模块接收到的 SRI ACK消息中用于标识 被叫用户是否为 IP多媒体子系统 IMS用户的用户标识信元,进行呼叫路由选择。
7、 根据权利要求 6所述的网关移动交换中心, 其特征在于, 若所述路由选 择模块接收到的用户标识信元标识被叫用户为 IMS用户, 则查询电话号码映射 服务器 ENUM服务器,获取被叫用户 IP地址进而将呼叫路由到服务呼叫会话控 制功能 S-CSCF实体。
8、 根据权利要求 6所述的网关移动交换中心, 其特征在于, 若所述路由选 择模块接收到的用户标识信元标识被叫用户为非 IMS用户, 则根据获取到的漫 游号码, 将呼叫路由到被叫用户的访问移动交换中心 VMSC。
9、 一种电路交换域 CS和长期演进 LTE共建组网系统, 包括网关移动交换 中心 GMSC、 归属用户服务器 HLR/归属位置寄存器 HSS, 其特征在于,
所述 GMSC, 用于接收访问管理的入局信令消息 IAM入局信令消息, 向 HLR/HSS发送路由信息请求 SRI消息; 接收所述 HLR/HSS返回的所述 SRI响 应消息 SRI ACK消息;根据所述 SRI ACK消息中用于标识被叫用户是否为 IMS 用户的用户标识信元, 进行呼叫路由选择;
所述 HLR/HSS , 用于向所述 GMSC返回所述 SRI ACK消息。
10、 根据权利要求 9所述的系统, 其特征在于,
若所述 GMSC接收到的用户标识信元标识被叫用户为 IMS用户, 则查询电 话号码映射服务器 ENUM服务器,获取被叫用户 IP地址进而将呼叫路由到服务 呼叫会话控制功能 S-CSCF实体;
若所述 GMSC接收到的用户标识信元标识被叫用户为非 IMS用户, 则才艮据 获取到的漫游号码, 将呼叫路由到被叫用户的访问移动交换中心 VMSC。
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