CN100442941C

Movatterモバイル変換

Info

Publication number: CN100442941C
Application number: CNB2006101680154A
Authority: CN
Inventors: 杨胜强
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2006-12-15
Filing date: 2006-12-15
Publication date: 2008-12-10
Anticipated expiration: 2026-12-15
Also published as: WO2008083566A1; CN1976536A

Abstract

A method for realizing the roaming includes receiving position registration of MS roamed to itself service region by RAC, recording MS information if MS record is not existed and requesting position registration from NGN exchange, distributing a roaming telephone number to MS by NGN exchange and sending said number to SHLR, updating MS record stored by SHLR and sending distributed telephone number to RAC by NGN exchange after response message sent back from SHLR is received. The system for realizing said method is also disclosed.

Description

Translated fromChinese

一种实现漫游的方法和系统A method and system for realizing roaming

技术领域technical field

本发明涉及无线本地环路网络(WLL，Wireless Local Loop)技术，特别涉及一种用户在无线本地环路网络中实现漫游的方法和系统。The present invention relates to a wireless local loop network (WLL, Wireless Local Loop) technology, in particular to a method and a system for a user to roam in a wireless local loop network.

背景技术Background technique

WLL网络利用现有无线技术为固定终端设备或区域移动终端设备提供终端业务服务，具有投资少、容量大、覆盖广、部署灵活、建网速度快、适应环境能力强、不易受自然灾害破坏以及网络配置简单等优点。WLL网络可作为有线网络的补充，为固网运营商提供更加丰富和经济的建网方案。WLL network uses existing wireless technology to provide terminal business services for fixed terminal equipment or regional mobile terminal equipment. The network configuration is simple and so on. The WLL network can be used as a supplement to the wired network, providing more abundant and economical network construction solutions for fixed network operators.

图1为基于码分多址(CDMA)2000的WLL系统组网结构示意图，如图1所示，无线接入控制器(RAC)向下通过Abis接口连接多个基站收发信机(BTS)，控制整个无线信道的接入；向上通过V5接口连接本地交换机(LocalExchange)接入公共电话交换网(PSTN)，通过A10/A11接口接入分组数据业务网(PDSN)；RAC通过操作维护中心(OMC)进行相关操作维护。Figure 1 is a schematic diagram of the network structure of a WLL system based on Code Division Multiple Access (CDMA) 2000. As shown in Figure 1, the Radio Access Controller (RAC) is downwardly connected to multiple base transceiver stations (BTS) through the Abis interface. Control the access of the entire wireless channel; connect to the local exchange (LocalExchange) through the V5 interface to access the public switched telephone network (PSTN), and access to the packet data service network (PDSN) through the A10/A11 interface; RAC through the operation and maintenance center (OMC) ) for related operation and maintenance.

RAC中与用户数据管理相关的模块包括：归属用户数据库(HDB)模块以及拜访用户数据库(VDB)模块。其中，HDB模块的功能类似于移动网络中的归属位置寄存器(HLR)，用于存储用户的开户数据；VDB模块的功能类似于移动网络中的拜访位置寄存器(VLR)，用于存储拜访用户的信息。Modules related to user data management in the RAC include: a home user database (HDB) module and a visitor database (VDB) module. Among them, the function of the HDB module is similar to the home location register (HLR) in the mobile network, which is used to store the account opening data of the user; the function of the VDB module is similar to the visitor location register (VLR) in the mobile network, which is used to store the user's information.

随着下一代网络(NGN)交换机的不断发展，交换机的容量越来越大，为了覆盖尽量大的区域，一个NGN交换机下通常连接多个RAC，而为了保证相邻RAC之间重叠区域的用户通话质量，需要将相邻RAC通过A3/A7链路进行互联。此外，有些运营商为了吸引用户，希望提供在较大区域内的有限漫游功能，这样就要求两两RAC之间都必须配置A3/A7链路，而如果漫游用户的数量很多，就需要相当大的A3/A7带宽才行，否则网络质量就得不到保证。但是，随着RAC数量的不断增多，每个RAC很难提供如此之多的A3/A7接口与网络中其它剩余的RAC互联，而且过多的A3/A7互联链路会占用很大的传输资源。With the continuous development of the next generation network (NGN) switch, the capacity of the switch is getting larger and larger. In order to cover as large an area as possible, an NGN switch is usually connected to multiple RACs, and in order to ensure that users in overlapping areas between adjacent RACs To improve call quality, adjacent RACs need to be interconnected through A3/A7 links. In addition, in order to attract users, some operators hope to provide a limited roaming function in a large area, which requires that A3/A7 links must be configured between two RACs, and if there are a large number of roaming users, a considerable A3/A7 bandwidth is required, otherwise the network quality cannot be guaranteed. However, as the number of RACs continues to increase, it is difficult for each RAC to provide so many A3/A7 interfaces to interconnect with other remaining RACs in the network, and too many A3/A7 interconnection links will occupy a lot of transmission resources .

公开号为CN 1527521A的专利申请于2004年9月8日公开了一种在无线本地环中实现基站控制器之间接入呼叫的方法，该方法通过扩展CDMA基站控制器(BSC)之间的A3/A7接口，使其支持BSC之间的接入呼叫以及相应的呼叫过程，从而解决了WLL中跨BSC进行接入呼叫的问题，这里所提到的BSC在网络中所起到的作用类似于前述的RAC。Publication number is that the patent application of CN 1527521A discloses a kind of method that realizes the access call between the base station controllers in the wireless local loop on September 8, 2004, and this method is by extending the A3 between the CDMA base station controllers (BSC) /A7 interface, so that it supports the access call between BSCs and the corresponding call process, thereby solving the problem of access calls across BSCs in the WLL. The role of the BSC mentioned here in the network is similar to The aforementioned RAC.

但是，这种方法依赖于CDMA BSC之间的A3/A7互联程度以及带宽限制，即，在没有A3/A7互联的BSC之间，用户无法实现漫游，而且当两个BSC之间的A3/A7接口带宽很小时，无法支持大量用户使用漫游业务，而不断的增加A3/A7互联和增大带宽又造成了漫游组网方案的复杂性；此外，网络中的每个RAC都需要配置用户数据，就整个系统而言，造成了用户数据分散，不利于集中管理。However, this method depends on the degree of A3/A7 interconnection between CDMA BSCs and bandwidth limitations, that is, users cannot roam between BSCs without A3/A7 interconnection, and when A3/A7 between two BSCs The small interface bandwidth cannot support a large number of users to use roaming services, and the continuous increase of A3/A7 interconnection and bandwidth increases the complexity of the roaming networking solution; in addition, each RAC in the network needs to configure user data, As far as the entire system is concerned, user data is scattered, which is not conducive to centralized management.

发明内容Contents of the invention

有鉴于此，本发明的主要目的在于提供一种用户在无线本地环路网络中实现漫游的方法，该方法不需要A3/A7互联链路，而且组网灵活。In view of this, the main purpose of the present invention is to provide a method for a user to realize roaming in a wireless local loop network, which does not require an A3/A7 interconnection link and has flexible networking.

本发明的另一个目的在于提供一种用户在无线本地环路网络中实现漫游的系统，该系统不需要A3/A7互联链路，而且组网灵活。Another object of the present invention is to provide a system for users to realize roaming in a wireless local loop network. The system does not require an A3/A7 interconnection link and has flexible networking.

为达到上述目的，本发明的技术方案是这样实现的：In order to achieve the above object, technical solution of the present invention is achieved in that way:

一种用户在无线本地环路网络中实现漫游的方法，在WLL中预先设置用于存储用户终端MS开户信息的智能归属位置寄存器SHLR，该方法还包括：A method for a user to roam in a wireless local loop network, presetting an intelligent home location register SHLR for storing user terminal MS account opening information in a WLL, the method also includes:

A、MS漫游到无线接入控制器RAC服务区，RAC接受MS的位置登记请求；A. The MS roams to the RAC service area, and the RAC accepts the MS's location registration request;

B、若RAC查询到该MS的记录不存在，则创建该MS的记录，并向下一代网络NGN交换机请求位置登记；B. If the RAC finds that the record of the MS does not exist, then create the record of the MS, and request the location registration to the NGN switch of the next generation network;

C、NGN交换机为MS分配漫游电话号码，并将分配的漫游电话号码发送给SHLR，SHLR刷新自身保存的该MS的记录；C. The NGN switch assigns a roaming phone number to the MS, and sends the assigned roaming phone number to the SHLR, and the SHLR refreshes the record of the MS saved by itself;

D、NGN交换机在接收到SHLR回送的响应消息后，将分配的漫游电话号码发送给RAC。D. After receiving the response message returned by the SHLR, the NGN switch sends the assigned roaming phone number to the RAC.

一种用户在无线本地环路网络中实现漫游的系统，该系统包括：SHLR、NGN交换机以及RAC；A system for users to roam in a wireless local loop network, the system includes: SHLR, NGN switch and RAC;

所述RAC，用于接收来自MS的位置登记请求，并在查询到该MS的记录不存在时，创建该MS的记录，并向NGN交换机发送MS请求位置登记消息；The RAC is configured to receive a location registration request from the MS, and when it is found that the MS's record does not exist, create the MS's record, and send an MS request location registration message to the NGN switch;

所述NGN交换机，用于接收来自所述RAC的MS请求位置登记消息，为MS分配漫游电话号码，并将分配的漫游电话号码发送给SHLR；接收到SHLR回送的响应消息后，将分配的漫游电话号码发送给RAC；The NGN switch is configured to receive the MS request location registration message from the RAC, assign a roaming phone number to the MS, and send the assigned roaming phone number to the SHLR; after receiving the response message returned by the SHLR, send the assigned roaming phone number Telephone number sent to RAC;

所述SHLR，用于存储系统中MS开户信息，接收来自NGN交换机的为MS分配的漫游电话号码，更新所记录的发起位置登记请求的MS的信息，向NGN交换机回送响应消息。The SHLR is used to store the account opening information of the MS in the system, receive the roaming phone number assigned to the MS from the NGN switch, update the recorded information of the MS that initiates the location registration request, and send a response message back to the NGN switch.

可见，本发明的技术方案，在WLL网络中增加了一个用于存储与管理网络中MS信息的SHLR，当MS因漫游而位置变化时，SHLR能够随时更新所存储的MS记录信息，这样，当主叫端MS呼叫被叫端MS时，主叫端MS所在网络NGN交换机只需查询SHLR即可获得被叫端MS当前所在网络位置，从而直接将呼叫路由至被叫端MS所在网络，与现有技术相比，本发明方法无需使用A3/A7互联链路，整个网络系统组网灵活、方便。It can be seen that in the technical solution of the present invention, an SHLR for storing and managing MS information in the network is added in the WLL network. When the location of the MS changes due to roaming, the SHLR can update the stored MS record information at any time. When the calling end MS calls the called end MS, the NGN switch of the network where the calling end MS is located only needs to query the SHLR to obtain the current network location of the called end MS, so as to directly route the call to the network where the called end MS is located. Compared with existing technologies, the method of the present invention does not need to use A3/A7 interconnection links, and the whole network system is flexible and convenient in networking.

附图说明Description of drawings

图1为基于CDMA 2000的WLL系统组网结构示意图；Fig. 1 is a schematic diagram of the network structure of the WLL system based on CDMA 2000;

图2为本发明系统组成结构示意图；Fig. 2 is a schematic diagram of the composition and structure of the system of the present invention;

图3为本发明方法的总体流程图；Fig. 3 is the overall flowchart of the inventive method;

图4为本发明MS进行位置登记流程图；Fig. 4 is a flow chart of MS performing location registration in the present invention;

图5为本发明语音主叫业务流程图；Fig. 5 is the flow chart of voice calling service of the present invention;

图6为本发明语音被叫业务接续的流程图。Fig. 6 is a flow chart of voice calling service connection in the present invention.

具体实施方式Detailed ways

为使本发明的目的、技术方案及优点更加清楚明白，以下参照附图并举实施例，对本发明作进一步地详细说明。In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

图2为本发明系统组成结构示意图，如图2所示，该系统主要包括SHLR、NGN交换机以及RAC。Fig. 2 is a schematic diagram of the composition and structure of the system of the present invention. As shown in Fig. 2, the system mainly includes SHLR, NGN switch and RAC.

其中，RAC，用于接收来自MS的位置登记请求，并向NGN交换机发送MS请求位置登记消息；Among them, the RAC is used to receive the location registration request from the MS, and send the MS request location registration message to the NGN switch;

NGN交换机，用于接收来自RAC的MS请求位置登记消息，为MS分配漫游电话号码，并将分配的漫游电话号码发送给智能归属位置寄存器(SHLR)；在接收到SHLR回送的响应消息后，NGN交换机将分配的漫游电话号码发送给RAC；The NGN switch is used to receive the MS request location registration message from the RAC, assign a roaming phone number to the MS, and send the assigned roaming phone number to the Smart Home Location Register (SHLR); after receiving the response message returned by the SHLR, the NGN The switch sends the assigned roaming phone number to the RAC;

SHLR，用于存储系统中MS开户信息，并在接收到来自NGN交换机的为MS分配的漫游电话号码后，更新记录的发起位置登记请求的MS信息，并向NGN交换机回送响应消息。SHLR is used to store the MS account opening information in the system, and after receiving the roaming phone number assigned to the MS from the NGN switch, update the recorded MS information that initiated the location registration request, and send a response message back to the NGN switch.

SHLR进一步用于，向NGN交换机发送登记取消消息；NGN交换机进一步用于，在接收到来自SHLR的登记取消消息后，通知RAC删除相应的MS记录，接收来自RAC的完成删除通知后，向SHLR回送登记取消响应。The SHLR is further used to send a registration cancellation message to the NGN switch; the NGN switch is further used to notify the RAC to delete the corresponding MS record after receiving the registration cancellation message from the SHLR, and send it back to the SHLR after receiving the deletion completion notification from the RAC Register Cancel Response.

在进行被叫接续业务时，主叫端MS所在NGN交换机进一步用于，向SHLR发送查询路由请求消息，接收SHLR返回的结果，将呼叫路由至被叫端MS所在NGN交换机；SHLR进一步用于，接收来自主叫端MS所在NGN交换机的查询路由请求后，查询被叫端MS所在NGN交换机，并将查询结果发送给作为主叫端MS所在的NGN交换机。When performing the called connection service, the NGN switch where the MS at the calling end is located is further used to send a query routing request message to the SHLR, receives the result returned by the SHLR, and routes the call to the NGN switch where the MS at the called end is located; the SHLR is further used to, After receiving the query routing request from the NGN switch where the MS at the calling end is located, query the NGN switch where the MS at the called end is located, and send the query result to the NGN switch where the MS at the calling end is located.

其中，一个SHLR可以连接多个NGN交换机，而一个NGN交换机又可以分别连接多个RAC，本实施例中为了描述方便，图2中SHLR只连接两个NGN交换机，即NGN交换机1和NGN交换机2，以下为便于描述，将NGN交换1和NGN交换机2简称为NGN1和NGN2，而这两个NGN交换机又分别只连接一个RAC，即RAC1和RAC2。Wherein, one SHLR can be connected to multiple NGN switches, and one NGN switch can be connected to multiple RACs respectively. In this embodiment, for the convenience of description, the SHLR in FIG. 2 is only connected to two NGN switches, that is,NGN switch 1 and NGN switch 2 In the following, for the convenience of description, theNGN switch 1 and the NGN switch 2 are referred to as NGN1 and NGN2 for short, and these two NGN switches are respectively connected to only one RAC, that is, RAC1 and RAC2.

RAC与NGN交换机之间通过扩展V5接口进行信息交互，相比于传统的V5接口，本发明的扩展V5接口中新增了登记通知消息、登记通知响应消息、登记取消消息以及登记取消响应消息；NGN交换机与SHLR之间通过扩展移动应用部分(MAP)协议进行信息交互，相比于传统的MAP协议，本发明的扩展MAP协议中新增了登记通知消息、登记通知响应消息、登记取消消息以及登记取消响应消息。Between the RAC and the NGN switch, the information exchange is carried out through the extended V5 interface. Compared with the traditional V5 interface, the extended V5 interface of the present invention adds a registration notification message, a registration notification response message, a registration cancellation message and a registration cancellation response message; Between the NGN exchange and the SHLR, the information interaction is carried out by extending the Mobile Application Part (MAP) protocol. Compared with the traditional MAP protocol, the extended MAP protocol of the present invention has newly added a registration notification message, a registration notification response message, a registration cancellation message and Register cancel response message.

假设MS现在从原来的NGN2管辖的RAC2服务区漫游到了NGN1管辖的RAC1服务区中，并且该MS向RAC2中的某个MS发起语音主叫，则该系统的工作过程如下：Assuming that the MS roams from the original RAC2 service area governed by NGN2 to the RAC1 service area governed by NGN1, and the MS initiates a voice call to an MS in RAC2, the working process of the system is as follows:

MS漫游到RAC1的服务区内，向RAC1发送位置登记请求，如登记消息；RAC1记录该MS的信息，并向NGN1发送登记通知消息，通知NGN1该MS请求进行位置登记；NGN1为MS分配空闲电话号码作为其漫游电话号码，并通知SHLR更新其关于该MS的相关记录；SHLR查询该MS记录中是否存在旧漫游电话号码，若存在，则SHLR通知MS原漫游网络NGN2删除该MS的记录；在接收到SHLR发送的登记通知响应消息后，NGN1将所分配的漫游电话号码通知给RAC1；当该MS进行语音主叫业务时，RAC1分别与NGN1及MS之间建立承载B通路和无线业务信道，RAC1将MS呼叫接入NGN1；NGN1通过查询SHLR获知被叫端MS所在的网络NGN2和RAC2后，向NGN2发起呼叫请求，NGN2与RAC2及RAC2与被叫端MS之间建立起连接通路，被叫用户摘机应答，主被叫用户双方通话建立。MS roams into the service area of RAC1, and sends a location registration request to RAC1, such as a registration message; RAC1 records the information of the MS, and sends a registration notification message to NGN1, notifying NGN1 that the MS requests location registration; NGN1 assigns an idle phone to the MS number as its roaming phone number, and notify SHLR to update its relevant records about the MS; SHLR inquires whether there is an old roaming phone number in the MS record, and if it exists, SHLR notifies the original roaming network NGN2 of the MS to delete the MS record; After receiving the registration notification response message sent by SHLR, NGN1 notifies RAC1 of the assigned roaming phone number; when the MS makes a voice call service, RAC1 establishes a bearer B channel and a wireless service channel with NGN1 and MS respectively, RAC1 connects the MS call to NGN1; NGN1 sends a call request to NGN2 after learning the network NGN2 and RAC2 where the called MS is located by querying the SHLR, and a connection path is established between NGN2 and RAC2 and between RAC2 and the called MS. The user picks up the phone to answer, and the call between the calling and called users is established.

图3为本发明方法的总体流程图，如图3所示，包括以下步骤：Fig. 3 is the overall flowchart of the inventive method, as shown in Fig. 3, comprises the following steps:

301、MS漫游到RAC服务区，RAC接受MS的位置登记请求；301. The MS roams to the RAC service area, and the RAC accepts the location registration request of the MS;

位置登记请求中携带国际移动用户标识(IMSI)、电子序列号(ESN)以及MS位置信息。The location registration request carries International Mobile Subscriber Identity (IMSI), Electronic Serial Number (ESN) and MS location information.

302、若RAC查询到该MS记录不存在，则创建该MS记录，并向NGN交换机请求位置登记；302. If the RAC finds that the MS record does not exist, create the MS record, and request location registration from the NGN switch;

303、NGN交换机为MS分配漫游电话号码，并将分配的漫游电话号码发送给SHLR，SHLR刷新自身保存的该MS记录。303. The NGN switch assigns a roaming phone number to the MS, and sends the assigned roaming phone number to the SHLR, and the SHLR refreshes the MS record saved by itself.

304、NGN交换机在接收到SHLR回送的响应消息后，将分配的漫游电话号码发送给RAC。304. After receiving the response message returned by the SHLR, the NGN switch sends the assigned roaming phone number to the RAC.

SHLR为整个网络的数据中心，为每个MS配置开户信息，SHLR中的开户信息表由分别用于存储IMSI、ESN、鉴权密钥(AKey)、逻辑电话号码以及漫游电话号码信息的各字段组成。其中，若是对合法性要求不高，也可以不配置ESN和AKey；IMSI和逻辑电话号码为开户时必须配置的信息，逻辑电话号码为一纯虚拟号码，是用户对外公布的电话号码，即号码薄电话号码；漫游电话号码在开户时无需配置，随MS位置的变化而变化，由登记流程自动更新，是MS实际所在位置对应的电话号码。与现有技术用HDB模块保存MS信息相比，本发明网络中所有MS信息均由SHLR统一进行存储与维护，方便了管理。SHLR is the data center of the entire network, and configures account opening information for each MS. The account opening information table in SHLR consists of fields for storing IMSI, ESN, authentication key (AKey), logical phone number, and roaming phone number information. composition. Among them, if the legality requirements are not high, ESN and AKey may not be configured; IMSI and logical phone number are the information that must be configured when opening an account. The logical phone number is a pure virtual number, which is the phone number announced by the user, that is, the number Thin phone number; roaming phone number does not need to be configured when opening an account, it changes with the change of MS location, and is automatically updated by the registration process, which is the phone number corresponding to the actual location of the MS. Compared with the HDB module used to store MS information in the prior art, all MS information in the network of the present invention is uniformly stored and maintained by SHLR, which facilitates management.

预先将所有RAC中的一些无线参数的值进行区别设置，如频点、位置区码(LAC)、系统识别码(SID)或网络识别码(NID)或这几种参数的任意组合，这样，当MS进入到新的RAC服务区时，就会自动进行位置登记。Set the values of some wireless parameters in all RACs in advance, such as frequency point, location area code (LAC), system identification code (SID) or network identification code (NID) or any combination of these parameters, so that, When the MS enters a new RAC service area, it will automatically perform location registration.

以下所述为本发明方法的一个较佳实施例：Described below is a preferred embodiment of the inventive method:

图4为本发明用户进行位置登记流程示意图，如图4所示，包括以下步骤：Fig. 4 is a schematic diagram of the location registration process of the user in the present invention, as shown in Fig. 4, including the following steps:

步骤401：MS进入到新服务区RAC1，自动进行位置登记，向RAC1发送登记消息(Registration Message)；Step 401: The MS enters the new service area RAC1, automatically performs location registration, and sends a registration message (Registration Message) to RAC1;

登记消息中携带有IMSI、ESN以及位置信息。The registration message carries IMSI, ESN and location information.

步骤402：RAC1根据IMSI在VDB中查询该MS记录是否存在，若存在，则执行步骤403；否则，执行步骤404。Step 402: RAC1 inquires whether the MS record exists in the VDB according to the IMSI, and if yes, executes step 403; otherwise, executes step 404.

步骤403：RAC1刷新VDB中的该MS位置信息，并执行步骤418。Step 403: RAC1 refreshes the MS location information in the VDB, and executes Step 418.

步骤404：RAC1在VDB中创建该MS记录，保存该MS的IMSI、ESN以及位置信息。Step 404: RAC1 creates the MS record in the VDB, and saves the IMSI, ESN and location information of the MS.

步骤405：RAC1向NGN1发送登记通知消息(REGNOT)；Step 405: RAC1 sends a registration notification message (REGNOT) to NGN1;

登记通知消息中携带IMSI和ESN。The IMSI and ESN are carried in the registration notification message.

步骤406：NGN1收到登记通知消息后，为MS分配一空闲电话号码作为其漫游电话号码；Step 406: After receiving the registration notification message, NGN1 assigns an idle phone number to the MS as its roaming phone number;

NGN在建网时根据漫游用户的比例预留了相应的空闲电话号码。NGN reserves corresponding free phone numbers according to the proportion of roaming users when building the network.

步骤407：NGN1向SHLR发送登记通知消息；Step 407: NGN1 sends a registration notification message to SHLR;

登记通知消息中携带有IMSI、ESN、漫游电话号码以及登记原因值，其中登记原因值为新登记指示。The registration notification message carries the IMSI, ESN, roaming phone number and registration reason value, wherein the registration reason value is a new registration indication.

步骤408：SHLR接收到登记通知消息，获知登记原因值为新登记指示，则通过IMSI查询用户数据库，将漫游电话号码保存到新号码记录(newPN)中。Step 408: SHLR receives the registration notification message and learns that the registration reason value is a new registration indication, then queries the user database through the IMSI, and saves the roaming phone number in the new number record (newPN).

步骤409：SHLR取出用户数据记录中保存的旧漫游电话号码，向旧漫游电话号码所在服务系统中的NGN2发送登记取消(REGCANC)消息；Step 409: SHLR takes out the old roaming phone number saved in the user data record, and sends a registration cancellation (REGCANC) message to NGN2 in the service system where the old roaming phone number is located;

登记取消消息中携带有IMSI、ESN以及旧漫游电话号码。The registration cancellation message carries the IMSI, ESN and old roaming phone number.

步骤410：NGN2向旧服务区RAC2发送登记取消消息；Step 410: NGN2 sends a registration cancellation message to the old service area RAC2;

步骤411：RAC2根据IMSI在VDB中查询MS记录，将查找到的对应MS记录从VDB数据库中删除。Step 411: RAC2 searches the VDB for MS records according to the IMSI, and deletes the found corresponding MS records from the VDB database.

步骤412：RAC2向NGN2发送登记取消响应(regcanc)。Step 412: RAC2 sends a registration cancel response (regcanc) to NGN2.

步骤413：NGN2将旧漫游电话号码释放，并向SHLR发送登记取消响应。Step 413: NGN2 releases the old roaming phone number, and sends a registration cancellation response to SHLR.

步骤414：SHLR接收到登记取消响应后，清除IMSI对应的MS记录中旧漫游电话号码，并用步骤408中的newPN对MS记录赋值更新。Step 414: After receiving the registration cancellation response, the SHLR clears the old roaming phone number in the MS record corresponding to the IMSI, and updates the MS record with the newPN in step 408.

步骤415：更新成功后，SHLR向NGN1发送登记通知响应(regnot)消息；Step 415: After the update is successful, SHLR sends a registration notification response (regnot) message to NGN1;

登记通知响应消息中携带有IMSI、ESN、逻辑电话号码，鉴权密钥(AKey)和漫游电话号码。The registration notification response message carries IMSI, ESN, logical phone number, authentication key (AKey) and roaming phone number.

步骤416：NGN1向RAC1发送登记通知响应消息；Step 416: NGN1 sends a registration notification response message to RAC1;

登记通知响应消息中携带有IMSI、ESN、逻辑电话号码，鉴权密钥(AKey)以及漫游电话号码。The registration notification response message carries IMSI, ESN, logical phone number, authentication key (AKey) and roaming phone number.

步骤417：RAC1接收到登记通知响应消息后，取出消息中携带的IMSI、ESN、逻辑电话号码，鉴权密钥(AKey)和漫游电话号码，通过IMSI查询VDB中的MS记录信息，查找到对应的MS记录后，将ESN、逻辑电话号码，鉴权密钥(AKey)和漫游电话号码保存进MS记录中。Step 417: After receiving the registration notification response message, RAC1 takes out the IMSI, ESN, logical phone number, authentication key (AKey) and roaming phone number carried in the message, queries the MS record information in the VDB through the IMSI, and finds the corresponding After the MS record, save the ESN, logical phone number, authentication key (AKey) and roaming phone number into the MS record.

步骤418：RAC1向MS发送登记接受命令消息。Step 418: RAC1 sends a registration acceptance command message to the MS.

经过上述流程处理后，MS即可在漫游地使用所分配的漫游电话号码进行相关业务，如语音主叫业务和语音被叫接续业务等。After the above procedures are processed, the MS can use the assigned roaming phone number to perform related services in the roaming area, such as voice calling service and voice callee connection service.

图5为本发明MS进行语音主叫业务的流程图，如图5所示，包括以下步骤：Fig. 5 is the flow chart that MS carries out voice calling service of the present invention, as shown in Fig. 5, comprises the following steps:

步骤501：MS在空中接口的接入信道上向RAC1发送带层2证实请求的始发消息(Origination Message)；Step 501: MS sends an origination message (Origination Message) with layer 2 confirmation request to RAC1 on the access channel of the air interface;

始发消息中包括语音业务选项、IMSI、ESN以及被叫端MS逻辑电话号码，即被叫用户号码薄电话号码。The originating message includes the voice service option, IMSI, ESN, and the logical telephone number of the called MS, that is, the telephone number of the called user directory.

步骤502：RAC1向MS发送基站证实指令(Base Station Ack Order)。Step 502: RAC1 sends a Base Station Ack Order to the MS.

步骤503：RAC1根据IMSI在VDB中查询该MS信息是否存在，若不存在则执行步骤504；否则执行步骤505。Step 503: RAC1 inquires whether the MS information exists in the VDB according to the IMSI, if not, execute step 504; otherwise, execute step 505.

步骤504：执行图4所描述的位置登记流程，此处不再赘述，然后执行步骤505。Step 504: Execute the location registration process described in FIG. 4 , which will not be repeated here, and then execute Step 505.

步骤505：RAC1向NGN1发送V5建立请求消息(ESTABLISH)，请求建立一条V5接口PSTN路径。Step 505: RAC1 sends a V5 establishment request message (ESTABLISH) to NGN1, requesting to establish a V5 interface PSTN path.

步骤506：NGN1向RAC1发送建立确认消息(ESTABLISH ACK)。Step 506: NGN1 sends an establishment confirmation message (ESTABLISH ACK) to RAC1.

步骤507：NGN1向RAC1发送V5接口分配消息(ALLOCATION)，申请分配一个V5接口承载B通路；Step 507: NGN1 sends a V5 interface allocation message (ALLOCATION) to RAC1, and applies for allocation of a V5 interface to bear the B channel;

分配消息中携带有V5接口的一条指定E1链路和时隙。The allocation message carries a specified E1 link and time slot of the V5 interface.

步骤508：RAC1向NGN1发送分配完成消息(ALLOCAITONCOMPLETE)，表示已经为该MS分配好承载B通路。Step 508: RAC1 sends an allocation complete message (ALLOCAITONCOMPLETE) to NGN1, indicating that the bearer B path has been allocated for the MS.

步骤509：RAC1在空中接口的寻呼信道上向MS发送信道指配消息(Channel Assignment Message)，启动无线业务信道的建立。Step 509: RAC1 sends a channel assignment message (Channel Assignment Message) to the MS on the paging channel of the air interface, and starts the establishment of the wireless service channel.

步骤510：MS在接收到两个连续完整的空闲帧后，在分配的反向业务信道上向RAC1发送前导帧(Tch Preamble)。Step 510: After receiving two consecutive complete idle frames, the MS sends a preamble frame (Tch Preamble) to RAC1 on the allocated reverse traffic channel.

步骤511：获取反向业务信道后，RAC1在前向业务接入信道上向MS发送带层2证实请求的基站证实指令。Step 511: After obtaining the reverse traffic channel, RAC1 sends the base station confirmation instruction with layer 2 confirmation request to the MS on the forward traffic access channel.

步骤512：收到基站证实指令后，MS向RAC1发送移动台证实指令(MS AckOrder)，并在反向业务信道上传送空的业务信道数据。Step 512: After receiving the confirmation order from the base station, the MS sends a mobile station confirmation order (MS AckOrder) to RAC1, and transmits empty traffic channel data on the reverse traffic channel.

步骤513：RAC1向MS发送业务连接消息(Service Connect Message)，以指定用于呼叫的业务配置。Step 513: RAC1 sends a Service Connect Message to the MS to specify the service configuration for the call.

步骤514：MS根据指定的业务配置处理业务。Step 514: MS processes services according to the specified service configuration.

步骤515：MS向RAC1发送业务连接完成消息(Service ConnectCompletion)。Step 515: MS sends a service connection completion message (Service Connect Completion) to RAC1.

经过以上步骤，V5接口链路和无线业务信道均建立完成并且互通。After the above steps, the V5 interface link and the wireless service channel are established and communicated.

步骤516：RAC1向NGN1发送被叫端MS逻辑电话号码，指示NGN1进行被叫接续。Step 516: RAC1 sends the logical telephone number of the called MS to NGN1, instructing NGN1 to connect the called party.

步骤517：NGN1与NGN2进行被叫接续，并由NGN2通过搭建好的业务链路向MS播放回铃音(Ring Back Tone)。Step 517: NGN1 and NGN2 perform the called connection, and NGN2 plays a Ring Back Tone (Ring Back Tone) to the MS through the established service link.

图6为本发明语音被叫业务接续的流程图，如图6所示，包括以下步骤：Fig. 6 is the flow chart of voice called service connection of the present invention, as shown in Fig. 6, comprises the following steps:

步骤601：NGN1向SHLR发送查询路由请求(ROUTEREQ)消息；Step 601: NGN1 sends a query routing request (ROUTEREQ) message to SHLR;

查询路由请求消息中携带有主叫端MS漫游电话号码以及被叫端MS逻辑电话号码。The route query request message carries the roaming phone number of the MS at the calling end and the logical phone number of the MS at the called end.

步骤602：SHLR根据主叫端MS漫游电话号码查询数据库，获得主叫端MS逻辑电话号码，根据被叫端MS逻辑电话号码查询数据库，获得被叫端MS漫游电话号码，并根据被叫端MS漫游电话号码获得被叫端MS当前所在的NGN2。Step 602: SHLR queries the database according to the MS roaming telephone number of the calling terminal, obtains the logical telephone number of the MS of the calling terminal, queries the database according to the logical telephone number of the MS of the called terminal, obtains the roaming telephone number of the MS of the called terminal, and obtains the MS The roaming telephone number obtains the NGN2 where the called end MS is currently located.

实际应用中，SHLR也可以不根据被叫端MS漫游电话号码来查询被叫端MS当前所在NGN2；被叫端MS进行位置登记过程中，RAC在MS记录中记录了该MS的位置信息，该位置信息中携带被叫端MS当前所在地址信息，RAC通过NGN进一步在登记通知消息中将该地址信息通知给SHLR，这样，SHLR根据被叫端MS逻辑电话号码查询数据库即可直接获得被叫端MS当前所在的NGN2。In practical applications, SHLR can also query the NGN2 where the called MS is currently located without using the roaming phone number of the called MS; during the location registration process of the called MS, the RAC records the MS's location information in the MS record. The location information carries the current address information of the called terminal MS, and the RAC further notifies the SHLR of the address information in the registration notification message through the NGN. In this way, the SHLR can directly obtain the called terminal MS by querying the database according to the logical telephone number of the called terminal MS. NGN2 where the MS is currently located.

步骤603：SHLR向NGN2发送查询路由请求消息。Step 603: SHLR sends a query route request message to NGN2.

步骤604：NGN2查询被叫端MS通话状态，若忙，则执行步骤605；否则，执行步骤606。Step 604: NGN2 queries the call status of the MS at the called end, and if busy, executes step 605; otherwise, executes step 606.

步骤605：NGN2向SHLR发送路由查询响应消息(routereq)，消息中携带MS状态指示，并执行步骤610。Step 605: NGN2 sends a route query response message (routereq) to SHLR, the message carries MS status indication, and executes step 610.

步骤606：NGN2向被叫端MS所在网络的RAC2发送查询路由请求消息。Step 606: NGN2 sends a route query request message to RAC2 of the network where the called MS is located.

步骤607：RAC2查询VDB中的该MS记录，获取MS状态。Step 607: RAC2 queries the MS record in the VDB to obtain the MS status.

步骤608：RAC2向NGN2发送路由查询响应消息，消息中携带MS状态指示。Step 608: RAC2 sends a route query response message to NGN2, and the message carries MS status indication.

步骤609：NGN2向SHLR发送路由查询响应消息，消息中携带MS状态指示。Step 609: NGN2 sends a route query response message to SHLR, and the message carries MS status indication.

步骤610：SHLR向NGN1发送路由查询响应消息，消息中携带主叫端MS逻辑电话号码、被叫端MS漫游电话号码以及被叫端MS状态指示。Step 610: SHLR sends a route query response message to NGN1, the message carries the logical telephone number of the MS at the calling end, the roaming telephone number of the MS at the called end, and a state indication of the MS at the called end.

步骤611：NGN1判断被叫端MS状态是否指示为忙，若是，则执行步骤612；否则，执行步骤613。Step 611: NGN1 judges whether the status of the MS at the called end indicates busy, and if so, executes step 612; otherwise, executes step 613.

步骤612：NGN1终止接续，结束此次呼叫。Step 612: NGN1 terminates the connection and ends the call.

步骤613：NGN1根据被叫端MS漫游电话号码重新进行选路出局，向被叫端MS所在的网络NGN2发送起始地址消息(IAM)；Step 613: NGN1 re-routes the outgoing call according to the roaming phone number of the called MS, and sends an initial address message (IAM) to the network NGN2 where the called MS resides;

起始地址消息中携带有主叫端MS逻辑电话号码和被叫端MS漫游电话号码。The initial address message carries the logical telephone number of the MS at the calling end and the roaming telephone number of the MS at the called end.

步骤614：NGN2向NGN1发送地址全消息(ACM)。Step 614: NGN2 sends an Address Complete Message (ACM) to NGN1.

步骤615：NGN2向RAC2发送V5接口分配消息，申请分配一个V5接口承载B通路；Step 615: NGN2 sends a V5 interface allocation message to RAC2, applying for the allocation of a V5 interface to bear the B channel;

分配消息中携带V5接口的一个指定链路和时隙。The allocation message carries a specified link and time slot of the V5 interface.

步骤616：RAC2向NGN2发送分配完成消息，表示已经为该MS分配好承载B通路。Step 616: RAC2 sends an allocation complete message to NGN2, indicating that the bearer B path has been allocated for the MS.

步骤617：NGN2向RAC2发送建立请求消息，指示启动PSTN端口。Step 617: NGN2 sends an establishment request message to RAC2, indicating to start the PSTN port.

步骤618：RAC2向NGN2发送建立确认消息。Step 618: RAC2 sends an establishment confirmation message to NGN2.

至此，RAC2与NGN2间完成呼叫接续流程。So far, the call connection process between RAC2 and NGN2 is completed.

步骤619：RAC2确定被叫端MS在本服务区内，向被叫端MS发送寻呼请求消息(General Page Message)，启动MS被叫建立过程。Step 619: RAC2 determines that the called MS is in the service area, sends a paging request message (General Page Message) to the called MS, and starts the MS called establishment process.

步骤620：被叫端MS在接入信道上向RAC2发送寻呼响应消息(PageResponse Message)。Step 620: The called MS sends a page response message (PageResponse Message) to RAC2 on the access channel.

步骤621：RAC2在空中接口上向被叫端MS发送基站证实指令。Step 621: RAC2 sends a base station verification instruction to the called MS on the air interface.

步骤622：业务信道建立过程，与图5中所描述的该过程相同，此处不再赘述。Step 622: The process of establishing a traffic channel is the same as the process described in FIG. 5, and will not be repeated here.

步骤623：RAC2向被叫端MS发送振铃消息(Alert with Info)，使得被叫端MS终端振铃。Step 623: RAC2 sends an alert message (Alert with Info) to the called terminal MS, so that the called terminal MS terminal rings.

步骤624：被叫端MS向RAC2发送移动台证实指令。Step 624: The called MS sends a mobile station verification instruction to RAC2.

步骤625：被叫端MS摘机应答，向RAC2发送带层2证实请求的连接指令(Connect Order)。Step 625: The MS at the called end responds by off-hooking, and sends a connection order (Connect Order) with a layer 2 confirmation request to RAC2.

步骤626：RAC2在前向业务信道上向被叫端MS发送基站证实指令。Step 626: RAC2 sends a base station verification instruction to the called MS on the forward traffic channel.

步骤627：RAC2向NGN2发送摘机信号消息(SINGAL(off hook))。Step 627: RAC2 sends an off-hook signal message (SINGAL (off hook)) to NGN2.

步骤628：NGN2向RAC2发送信号确认消息(SINGAL ACK)。Step 628: NGN2 sends a signal acknowledgment message (SINGAL ACK) to RAC2.

步骤629：NGN2向NGN1发送应答信号计费消息(ANC)，主被叫用户双方开始通话。Step 629: NGN2 sends an answer signal charging message (ANC) to NGN1, and the calling and called users start talking.

上述过程为本发明实现语音被叫接续业务的一个实施例，在实际应用中，还可以省略步骤603～609所述的查询MS状态过程，而是由SHLR在获知被叫端MS当前所在网络NGN2后，直接向NGN1回送路由查询响应消息，后续由NGN2或RAC2在接续过程中判断接续是否能继续进行，与图6所示过程相比，区别步骤在于：The above-mentioned process is an embodiment of the present invention to realize the voice caller connection service. In practical applications, the MS state inquiry process described in steps 603 to 609 can also be omitted, but the SHLR will know the network NGN2 where the called terminal MS is currently located. Afterwards, the route query response message is directly sent back to NGN1, and subsequently NGN2 or RAC2 judges whether the connection can continue during the connection process. Compared with the process shown in Figure 6, the different steps are:

步骤610：SHLR向NGN1发送路由查询响应消息，消息中携带主叫端MS逻辑电话号码和被叫端MS漫游电话号码。Step 610: SHLR sends a route query response message to NGN1, the message carries the logical telephone number of the MS at the calling end and the roaming telephone number of the MS at the called end.

步骤614：NGN2判断被叫端MS是否处于通话状态，若是，则结束流程，否则，向NGN1发送地址全消息(ACM)。Step 614: NGN2 judges whether the MS at the called end is in a call state, and if so, ends the process; otherwise, sends an Address Complete Message (ACM) to NGN1.

步骤616：RAC2通过查询VDB获知MS状态是否为忙，若是，则结束本流程；否则，向NGN2发送分配完成消息，表示已经为该MS分配好承载B通路。Step 616: RAC2 checks the VDB to know whether the MS status is busy, and if so, ends the process; otherwise, sends an allocation complete message to NGN2, indicating that the bearer B path has been allocated for the MS.

后续处理过程与图6所示相同，不再赘述。Subsequent processing is the same as that shown in FIG. 6 and will not be repeated here.

可见，采用本发明的技术方案，不仅有效地解决了用户在WLL网络中的漫游问题，而且该漫游的实现无需A3/A7互联链路，组网灵活、方便；整个WLL网络范围内的所有MS信息均由一个SHLR来统一存储与维护，方便了管理；此外，本发明的方案提出了一种介于WLL网络与全球移动网之间的中间形态组网，有利于未来WLL向全球移动网的平滑演进。It can be seen that adopting the technical solution of the present invention not only effectively solves the roaming problem of users in the WLL network, but also realizes the roaming without A3/A7 interconnection link, and the networking is flexible and convenient; all MSs within the entire WLL network range The information is all stored and maintained by one SHLR, which facilitates management; in addition, the solution of the present invention proposes an intermediate form of networking between the WLL network and the global mobile network, which is conducive to the future WLL to the global mobile network. Smooth evolution.

综上所述，以上仅为本发明的较佳实施例而已，并非用于限定本发明的保护范围。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。To sum up, the above are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.