WO2004023735A1 - Procede associe a un service intelligent de soutien de gprs - Google Patents

Procede associe a un service intelligent de soutien de gprs Download PDF

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Publication number
WO2004023735A1
WO2004023735A1 PCT/CN2003/000618 CN0300618W WO2004023735A1 WO 2004023735 A1 WO2004023735 A1 WO 2004023735A1 CN 0300618 W CN0300618 W CN 0300618W WO 2004023735 A1 WO2004023735 A1 WO 2004023735A1
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Prior art keywords
ggsn
intelligent
gprs
service
smart
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PCT/CN2003/000618
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English (en)
French (fr)
Inventor
Xingang Lu
Guanghua Zhang
Wangcheng Jiang
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Huawei Technologies Co., Ltd.
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Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Priority to AU2003248231A priority Critical patent/AU2003248231A1/en
Publication of WO2004023735A1 publication Critical patent/WO2004023735A1/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
    • H04W76/00Connection management
    • H04W76/20Manipulation of established connections
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W92/00Interfaces specially adapted for wireless communication networks
    • H04W92/02Inter-networking arrangements

Definitions

  • the present invention relates to the field of mobile communications, and in particular, to a method for supporting both intelligent services and ordinary services during the process of upgrading GPRS to an intelligent service network.
  • SGSN / SSF Service Switch Function, Service Switch Function
  • SCP Service Control Point, Service Control Point
  • SMS SMS
  • SGSN Service Management System, service management system
  • HLR Home Location Register, home location register
  • management function of GPRS smart contract information etc., in order to establish a GPRS network and intelligent services Control relationship.
  • Figure 1 is a schematic diagram of the networking of the SGSN / SSF solution.
  • the HLR inserts the user's CSI (smart subscription information) into the SGSN where the user roams.
  • CSI smart subscription information
  • GGSN / SSF solution As can be seen from the above, the SGSN / SSF solution requires the SGSN to support the GPRS SSF function, and the HLR to support the management function of the intelligent contract information, etc., that is to say: all the SGSN and HLR of the entire network Upgrade, because the number of SGSN and HLR is large, so the amount of engineering is large, And it also needs to perform the docking test of multiple manufacturers, which is not suitable for quickly and low-cost opening of GPRS intelligent services. Therefore, another GGSN-based GPRS intelligent network solution is introduced, that is, the GPRS SSF function is implemented by the GGSN.
  • the advantage of this solution is that no complicated upgrade of the HLR and SGSN is required, and only the simple data configuration on the GGSN is required. Can achieve the purpose of quickly providing GPRS intelligent services.
  • the GGSN when a GPRS user initiates a packet service access request, the GGSN establishes an intelligent relationship between the GPRS SSF and the SCP according to the configured intelligent user information, and the SCP implements user authentication and charging (according to Duration, traffic, location, etc.) to implement control functions for packet switching.
  • GGSN / SSF solutions have the advantages of flexible upgrades and low investment, and are a solution approved by many operators.
  • the GPRS network introduces the concepts of packet switching and packet transmission, so that the GSM (Globe Telecommunication Service of Mobile, Global Mobile Communication Service) network's support for data services is strengthened from the network system.
  • GSM Global Mobile Communication Service
  • GPRS is actually another network that is superimposed on the existing GSM network.
  • the GPRS network adds functional entities such as SGSN (Serving GPRS Support Node), GGSN (Gateway GPRS Support Node) on the basis of the original GSM network.
  • GPRS shares the existing BSS system of the GSM network, but the software and hardware must be updated accordingly.
  • a mobile station MS, Mobile Station
  • SGSN Serving GPRS support node.
  • SGSN provides services for MS, and cooperates with MSC / VLR / EIR (Mobile Switch Center / Visiting Location Register / Equipment Identity Register) to complete mobility management functions, including roaming, registration, Handover, authentication, etc., manage logical links, including the establishment, maintenance, and release of logical links, and manage wireless resources.
  • the SGSN provides management functions for the MS calling or called party, and completes packet data forwarding, address translation, encryption, and compression functions.
  • SGSN can complete the aggregation and transmission of Gb interface data and the conversion between Gn interface IP (Internet Protocol, Internet Protocol) protocols.
  • Gn interface IP Internet Protocol, Internet Protocol
  • GGSN Gateway GPRS support node.
  • the gateway GPRS support node is actually a gateway or router. It provides GPRS and public packet data network interconnected by X.25 or X.75 protocol (X.25 and X.75 are both data network protocols). It also supports GPRS and Interconnection of other GPRS. GGSN and SGSN both have IP addresses, and GGSN and SGSN together complete the GPRS routing function.
  • GSN GPRS Service Node, GPRS service node, including SGSN and GGSN
  • PLMN Public Land Mobile Network
  • Gn interface The interface between GSN (GPRS Service Node, GPRS service node, including SGSN and GGSN) nodes in the same PLMN (Public Land Mobile Network) is called the Gn interface.
  • the interface is called a G interface, and its signaling platform is shown in Figure 3, where:
  • UDP User Datagram Protocol
  • User Datagram Protocol A transport-oriented, non-connection-oriented protocol.
  • IP Internet Protocol
  • Ten measures for the network management layer Ten measures for the network management layer.
  • GTP On the GPRS backbone network, a tunnel encapsulation protocol for transmitting signaling and user data between SGSN and GGSN, and between SGSN and SGSN. All data packets transmitted between GSNs should be repackaged by GTP.
  • GTP protocol is defined in detail in the "GSM 09.60 Digital Cellular Communication System (Phase 2+); (GPRS) Tunneling Protocol Technical Specifications".
  • FIG. 4 it is a schematic diagram of the PDP context activation process. It can be seen from the figure that when a GPRS user initiates the activation process, the SGSN uses the APN (Access Point Name) information element carried in the activation request message. Go to a DNS (Domain Name Server, domain name server) to resolve the GGSN address, and then notify the GGSN to create a PDP context activation.
  • APN Access Point Name
  • DNS Domain Name Server, domain name server
  • BSS Base Station Subsystem
  • BSC Base Station Controller
  • BTS Base Transceive Station
  • Figure 5 is the PDP context activation process. As can be seen from the figure, the MS has performed several information interactions with the SGSN and GGSN.
  • the SGSN resolves the GGSN address by using the APN in the activation request message to the DNS server.
  • APN is a very important parameter in the GPRS network. Operators do not want to increase or decrease casually because This means modifying the network plan. At the same time, GPRS networks in many countries have already been put into commercial use. Modifying the APN will cause inconvenience to all mobile phone users, which is the last thing operators want to see.
  • the newly added GGSN (supporting intelligent functions, referred to as intelligent GGSN) to upgrade the GPRS intelligent network has the same APN as the original GGSN (not supporting intelligent functions, referred to as ordinary GGSN).
  • the address of one GGSN can be resolved through DNS using the same APN: either the address of the smart GGSN or the address of the ordinary GGSN.
  • the smart GGSN can support packet service access requests from smart users and non-smart users, while the original GGSN It does not have the GGSN / SSF function, and can only support packet service access requests from non-smart users.
  • the external network environment includes a GGSN, an intelligent GGSN, and an SGSN.
  • a user activation request message is first sent to the intelligent GGSN, and it is determined whether the activation request is an intelligent user activation according to an intelligent trigger rule. If yes, It is processed by the intelligent GGSN, otherwise, the activation request is forwarded to the ordinary GGSN for processing.
  • the smart judgment triggering rule is a rule for judging whether the user who sends the activation request information is a smart user.
  • the step of first sending the user activation request message to the smart GGSN is completed by modifying service data in the DNS so that the GGSN address resolved by the same APN is the smart GGSN address.
  • the activation request message forwarded by the intelligent GGSN to the ordinary GGSN is an activation request message that complies with the GTP protocol standard.
  • the activation response returned after the normal GGSN activation is successful
  • the response message can be accepted by the SGSN.
  • the intelligent GGSN forwards only activation signaling messages for ordinary users.
  • Figure 1 is a schematic diagram of the SGSN / SSF solution
  • Figure 2 is the GGSN / SSF solution
  • FIG. 3 is a schematic diagram of signaling platforms of different PLMNs
  • FIG. 4 is a schematic diagram of the PDP context activation process
  • FIG. 5 is a PDP context activation flowchart
  • Figure 6 is a schematic diagram of the topology of a GPRS backbone network
  • Figure 7 is a flow chart of proxy GGSN activation
  • Figure 8 is an activation flow diagram forwarded by the intelligent GGSN. detailed description
  • FIG. 7 it is a schematic diagram of the network connection of the external environment of the present invention.
  • the network environment includes SGSN, ordinary GGSN, and smart GGSN, and the connections are shown in the solid line in FIG. '
  • the process when processing a user activation request message, the process is different from that in the prior art.
  • the user activation request message is first sent to the smart GGSN, and whether the activation request is a smart user activation is determined according to the smart trigger rule. If yes, it is processed by the intelligent GGSN, otherwise, the activation request is forwarded to the ordinary GGSN for processing.
  • the smart trigger rule it is a rule for judging whether the user who sent the activation request information is a smart user. It is a judgment rule for the smart service triggered by the smart GGSN, which is determined by the operator. For example, China Mobile can use a mobile phone number as a smart trigger As a rule, a mobile phone number that starts with 136 belongs to a smart user.
  • the smart GGSN configures the 136 number segment as a smart user.
  • the mobile phone number starts with 136, it is considered a smart user, otherwise it is not.
  • other operators may not use mobile phone number segments as intelligent triggering rules but use other information, such as IMSI (Identification of mobile subscribers) number segments, and MSISDN (mobile subscription user number MS international PSTN). / ISDN number), that is, a mobile phone number, etc.
  • IMSI Identity of mobile subscribers
  • MSISDN mobile subscription user number MS international PSTN
  • the step that the user activation request message is first sent to the smart GGSN is completed by modifying the service data in the DNS so that the GGSN address resolved by the same APN is the smart GGSN address. The difference.
  • the correspondence between the APN and the GGSN address is stored in the DNS, which is actually a database.
  • the SGSN uses the APN as a key to find out the address of the GGSN. Therefore, the modification of the DNS involved in the present invention involves The data is actually to modify the configuration relationship of this database. For example, the original configuration relationship may be apnl ⁇ -> address 1, then our solution will modify it to apnl ⁇ -> address 2 by modifying the APN configuration in DNS. Data, that is, address analysis required by the present invention can be implemented.
  • the activation request message forwarded by the intelligent GGSN to the ordinary GGSN is an activation request message that complies with the GTP protocol standard.
  • the activation response message returned after the ordinary GGSN is successfully activated can be accepted by the SGSN.
  • the intelligent GGSN should only try to meet the requirements of forwarding ordinary users' activation signaling messages without forwarding user data streams.
  • the intelligent GGSN provides both the GPRS intelligent function and the proxy forwarding function of the activation request / response message, which we refer to as PPS & PROXY GGSN.
  • the MS sends a PDP context activation request message to the SGSN;
  • the SGSN sends the activation request message to PPS & PROXY GGSN through DNS resolution:
  • the source address in the IP header is SGSN Gn port address A, and the destination address is PPS & PROXY GGSN Gn port address B.
  • the activation request message contains two cells: "SGSN Address for signalling" and "SGSN Address for user traffic", respectively Represents the SGSN signaling address and data address used by the PDP context. Its value is the SGSN Gn port address A.
  • the key information of this message is as follows:
  • PPS & PROXY GGSN receives the activation request message:
  • the smart user determines whether the smart user is activated. If the smart user is activated, it will be handled by the GGSN itself; if it is a non-smart user, it will be forwarded to the ordinary GGSN, where the source address in the IP header is the Gn port address B of PPS & PROXY GGSN, and the destination address is ordinary GGSN
  • the Gn port address C the content of the GTP packet is not changed.
  • the two information elements contained in the activation request message "SGSN Address for signalling" and "SGSN Address for user traffic" respectively represent the SGSN signaling address and data address used by the PDP context, and their values are still the SGSN Gn port address A
  • the key information of the message is as follows:
  • IP header B-> C SGSN Address for signalling: A
  • the ordinary GGSN receives the activation request message:
  • the ordinary GGSN will establish a PDP context after receiving the activation request message.
  • the SGSN signaling address should be the cell carried in the activation request message.
  • SGSN Address for signalling A
  • the SGSN data address is the information carried in the message.
  • Element SGSN Address for user traffic A, and specify the GGSN signaling and data address as its own Gn port address C, and then return an activation response message.
  • the source address in the IP header of this message should be the ordinary GGSN Gn port address C
  • the destination address should be PPS & PROXY GGSN Gn port address B
  • the activation response message contains two cells: "GGSN Address for signalling” and "GGSN Address for user traffic", which respectively represent the GGSN signaling address used by the PDP context and Data address, whose value is the ordinary GGSN Gn port address C.
  • the key information of this message is as follows:
  • PPS & PROXY GGSN receives the activation response message:
  • PPS & PROXY GGSN After receiving the activation response message, PPS & PROXY GGSN forwards it to SGSN.
  • the source address in the message IP header is PPS & PROXY GGSN Gn port address B, and the destination address is SGSN Gn port address A.
  • PPS & PROXY GGSN does not care about the content of the activation response message and does nothing. modify. If the activation is successful, two cells will be included in the activation response message: "GGSN Address for signalling" and "GGSN Address for user traffic", which respectively represent the GGSN signaling address and data address used by the PDP context, and their values are still It is the Gn port address C of the ordinary GGSN.
  • the key information of this message is as follows:
  • GGSN Address for signalling C -GGSN Address for user traffic: C
  • the SGSN address in the PDP context should be the address A specified by itself, and the GGSN signaling address should be the cell carried in the activation response message.
  • GGSN Address for signalling C
  • GGSN data address is the message.
  • GGSN Address for user traffic C;
  • the SGSN returns an activation PDP context acceptance message to the MS. After receiving the message, the mobile phone user can start the GPRS service.
  • the present invention can well solve the problem that the operator quickly upgrades the GPRS intelligent network, and completely protects the existing investment of the operator, and improves the utilization rate of the network.

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
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Description

一种 GPRS支持智能业务的方法 技术领域 - 本发明涉及移动通信领域, 尤其涉及一种在将 GPRS升级为智能业务网络过 程中, 同时支持智能业务与普通业务的方法。 技术背景
随着移动智能业务的广泛应用, 运营商对 GPRS智能业务的需求也非常迫 切。 但是目前还存在一个非常关键的问题: 现在已有的 GPRS网络一般都不具备 支持智能业务的功能。
为了支持 GPRS智能业务, 可以有两种解决方案:
1、 SGSN/SSF ( Service Switch Function, 业务交换功能)解决方案: 顾名思 义就是在 SGSN上实现智能业务的交换功能。 GPRS网络引入智能网, 需要增加 智能网业务层的网元包括: SCP ( Service Control Point, 业务控制点)、 SMS
( Service Management System, 业务管理系统) 等设备, 还需要 SGSN支持 GPRS SSF功能、 HLR ( Home Location Register , 归属位置寄存器) 支持对 GPRS智能签约信息的管理功能等, 以建立 GPRS网络和智能业务之间的控制关 系。
图 1是 SGSN/SSF解决方案的组网示意图, 从图 1中可以看出, 当用户附着到 GPRS网络或者发起分组请求时, HLR将用户的 CSI (智能签约信息)插入到用 户漫游地的 SGSN, 建立 GPRS SSF与 SCP之间的智能关系, 由 SCP对用户进行鉴 权、 计费 (按时长、 流量、 位置等) , 实现对分组交换的控制功能。
2、 GGSN/SSF解决方案: 从上文可以看出, SGSN/SSF解决方案需要 SGSN 支持 GPRS SSF功能, HLR支持智能签约信息的管理功能等, 也就是说: 需要对 全网所有的 SGSN和 HLR进行升级, 由于 SGSN、 HLR数量多, 因此工程量大, 并且还需要进行多厂家的对接测试, 不适合于快速、 低成本地开通 GPRS智能业 务。 因此引出了另一种基于 GGSN的 GPRS智能网解决方案, 即由 GGSN实现 GPRS SSF功能, 此方案的优点是无需对 HLR和 SGSN进行复杂的升级, 只需要 通过在 GGSN上进行筒单的数据配置即可达到快速提供 GPRS智能业务的目的。 如图 2所示, 当 GPRS用户发起分组业务接入请求时, GGSN根据配置的智能用 户信息, 建立起 GPRS SSF与 SCP之间的智能关系, 由 SCP实现对用户的鉴权、 计费 (按时长、 流量、 位置等) , 实现对分组交换的控制功能。
两种方案在所提供的 GPRS智能业务上, 基本没有什么区别。 但是 GGSN/SSF解决方案比起 SGSN/SSF解决方案来, 具有升级灵活, 投资少的优 点, 是得到众多运营商认可的一种方案。
目前虽然一些厂家新的核心网设备已经具备了支持智能业务的功能, 但是由 于目前 GPRS现网上有很多不同厂家的 GGSN设备, 不可能要求所有的厂家同时 将 GGSN升级成支持 GPRS SSF功能, 而且不同厂家对 GPRS智能网的解决方案 也不尽相同, 因此, 这个协调工作将是一个非常漫长的过程。 运营商一旦决定 采用 GGSN/SSF方案来升级 GPRS智能网, 就需要将所有现网上的 GGSN替换成 支持 GPRS SSF功能的 GGSN, 代价还是太大。 因此运营商有这样一个强烈需 求: 在保护现有 GPRS网络投资的前提下, 尽量少的增加网络设备以及修改网络 规划, 就达到快速具备 GPRS智能业务的目的。
下面先介绍一下 GPRS的基本概念和背景。
GPRS网络引入了分组交换和分组传输的概念, 这样使得 GSM ( Globe telecommunication Service of Mobile, 全球移动通信业务) 网络对数据业务的支 持从网络体系上得到了加强。 GPRS其实是叠加在现有的 GSM网络的另一网 络, GPRS网络在原有的 GSM网络的基础上增加了 SGSN (服务 GPRS支持 '节 点) 、 GGSN (网关 GPRS支持节点)等功能实体。 GPRS共用现有的 GSM网络 的 BSS系统, 但要对软硬件进行相应的更新; 另外, 还要求移动台 (MS , Mobile Station )提供对 GPRS业务的支持。 其中:
SGSN: 服务 GPRS支持节点。
SGSN为 MS提供服务, 和 MSC/VLR/EIR ( Mobile Switch Center/Visiting Location Register/Equipment Identity Register,移动交换中心 /拜访地位置寄存器 / 设备标识寄存器) 配合完成移动性管理功能, 包括漫游、 登记、 切换、 鉴权 等, 对逻辑链路进行管理, 包括逻辑链路的建立、 维护和释放, 对无线资源进 行管理。 SGSN为 MS主叫或被叫提供管理功能, 完成分组数据的转发, 地址翻 译, 加密及压缩功能。 SGSN能完成 Gb接口数据的汇聚、 传输和 Gn接口 IP ( Internet Protocol, 互联网协议)协议间的转换。
GGSN: 网关 GPRS支持节点。
网关 GPRS支持节点实际上就是网关或路由器, 它提供 GPRS和公共分组数据 网以 X.25或 X.75协议(X.25和 X.75都是一种数据网协议) 互联, 也支持 GPRS和 其它 GPRS的互联。 GGSN和 SGSN—样都具有 IP地址, GGSN和 SGSN—起完成 了 GPRS的路由功能。
在本文档中, 我们只关心 GPRS支持节点之间的接口, 对于其他的内容不关 心。
在同一个 PLMN ( Public Land Mobile Network,公众陆地移动网络) 内的 GSN ( GPRS Service Node, GPRS业务节点, 包括 SGSN和 GGSN )节点之间的接口 称为 Gn接口, 不同 PLMN的 GSN节点之间的接口称为 G 接口, 其信令平台如图 3所示, 其中:
UDP ( User Datagram Protocol, 用户数据报协议) : 传输层面向非连接的协 议。
IP ( Internet Protocol ) : 网 έ备层十办议。
L2 ( Layer 2, 层二) : 数据链路层协议。
LI ( Layer 1 , 层一) : 物理层。 GTP: 在 GPRS骨干网上, SGSN和 GGSN之间、 SGSN和 SGSN之间传输信令 和用户数据的隧道封装协议, 所有在 GSN间传送的数据包都应经 GTP重新包 装。
注: GTP协议由 《GSM 09.60数字蜂窝通信系统(阶段 2 + ) ; ( GPRS ) 隧 道协议技术规范》详细定义。
如图 4所示, 是 PDP上下文激活过程示意图, 从图中可以看出, 一个 GPRS用 户发起激活流程时, SGSN通过激活请求消息中携带的 APN ( Access Point Name, 接入点名称)信元, 到 DNS ( Domain Name Server, 域名^^务器)解析 出 GGSN地址, 然后通知 GGSN创建 PDP上下文激活。
其中, BSS (基站子系统 Base Station Subsystem ) , 包括 BSC (基站控制器 Base Station Controller )和 BTS (基站 Base Transceive Station ) 。
图 5是 PDP上下文激活流程, 从图中可以看出, MS和 SGSN及 GGSN之间进行 了若干次信息的交互。
以上内容引自 GSM 03.60 ( V7.4.0 )数字蜂窝通信系统 (阶段 2 + ) ; GPRS 业务描述: 第二阶段。
从前文可以看到, SGSN是通过激活请求消息中的 APN到 DNS服务器去解析 出 GGSN地址的, 但是 APN作为 GPRS网络中的一个非常重要的参数, 运营商并 不希望随便的增加或者减少, 因为这就意味要修改网络规划。 同时现在很多国 家的 GPRS网络都已经投入商用, 修改 APN将会给所有手机用户带来不便, 这是 运营商最不希望看到的。
这样的话也就是说, 为了升级 GPRS智能网而新增的 GGSN (支持智能功 能, 筒称智能 GGSN )和原来的 GGSN (不支持智能功能, 筒称普通 GGSN )拥 有相同的 APN。 对于 SGSN来说, 采用同样的 APN通过 DNS只能解析出一个 GGSN的地址: 或者是智能 GGSN的地址, 或者是普通 GGSN的地址。 智能 GGSN可以支持智能用户以及非智能用户的分组业务接入请求, 而原有的 GGSN 不具备 GGSN/SSF功能, 只能支持非智能用户的分组业务接入请求。 这样就存在矛盾: 如果激活请求发往智能 GGSN, 所有的用户都可以激活, 但是原有的普通 GGSN就没有任何作用, 浪费了已有投资; 如果激活请求发往 普通 GGSN, 智能用户就不能激活成功, 相当于网络没有升级的情况。
在现有的 GPRS协议中, 只规定了 SGSN和 GGSN之间, SGSN和 SGSN之间的 协议接口, 采用的是 GTP协议。 GPRS骨干网的拓朴结构如图 6所示。 从图 6中可 以看出, 激活请求一旦到了其中的某个 GGSN, 要么在这个 GGSN上激活成功, 要么就是激活失败。 因此, 现有的技术已经无法解决运营商这个看似非常合情 合理的需求。 发明内容
本专利的目的就是针对在 GGSN/SSF解决方案中遇到的问题提出完整解决方 案。
一种 GPRS支持智能业务的方法, 外部网络环境包括 GGSN和智能 GGSN及 SGSN, 其中, 将用户激活请求消息首先发往智能 GGSN, 根据智能触发规则判 断此激活请求是否是智能用户激活, 如果是, 则由该智能 GGSN处理, 否则将 该激活请求转发给普通 GGSN处理。
所述的智能判断触发规则, 是判断发出激活请求信息的用户是否是智能用户 的规则。
所述的用户激活请求消息首先发往智能 GGSN的步骤, 是通过修改 DNS中的 业务数据, 使得同一个 APN解析出来的 GGSN地址为智能 GGSN地址的方式来完 成的。
所述的智能 GGSN转发给普通 GGSN的激活请求消息是符合 GTP协议标准的 激活情求消息。
所述的 GPRS支持智能业务的方法, 普通 GGSN激活成功之后返回的激活响 应消息能够被 SGSN接受。
所述的 GPRS支持智能业务的方法, 智能 GGSN只转发普通用户的激活信令 消息。
通过本发明的技术方案, 可以很好的解决运营商快速升级 GPRS智能网的问 题, 并且完完全全地保护了运营商的既有投资, 这是现有技术所无法解决的。 附图说明
图 1是 SGSN/SSF解决方案示意图;
图 2是 GGSN/SSF解决方案;
图 3是不同 PLMN的信令平台示意图;
图 4是 PDP上下文激活过程示意图;
图 5是 PDP上下文激活流程图;
图 6是 GPRS骨干网拓朴结构示意图;
图 7是代理 GGSN激活流程图;
图 8是经过智能 GGSN转发的激活流程图。 具体实施方式
下面结合说明书附图来说明本发明的具体实施方式。
如图 7所示, 是本发明外部环境的网络连接示意图, 从图中可以看到, 该网 络环境包括 SGSN, 普通 GGSN和智能 GGSN, 其连接如图 7中实线部分所 示。 '
本发明中, 在处理用户激活请求消息时, 与现有技术中的处理过程有所区 別, 将用户激活请求消息首先发往智能 GGSN, 根据智能触发规则判断此激活 请求是否是智能用户激活, 如果是, 则由该智能 GGSN处理, 否则将该激活请 求转发给普通 GGSN处理。 关于智能触发规则, 是判断发出激活请求信息的用户是否是智能用户的规 则, 它是智能 GGSN对智能业务触发的判断规则, 由运营商决定, 比如说中国 移动公司可以以手机号码做为智能触发规则, 手机号码以 136开头的属于智能用 户, 这样智能 GGSN就把 136这个号段配置成智能用户, 转发的时候如果手机号 码是以 136开头就认为是智能用户, 否则就不是。 另外其他的运营商可能就不会 用手机号段来做为智能触发规则而是采用其他的信息, 如 IMSI (移动签约用户 标识 Identification of mobile subscribers ) 号段, MSISDN (移动签约用户号码 MS international PSTN/ISDN number ) , 即手机号码等, 该智能触发规则是比较 灵活的。
该用户激活请求消息首先发往智能 GGSN的步驟, 是通过修改 DNS中的业 务数据, 使得同一个 APN解析出来的 GGSN地址为智能 GGSN地址的方式来 完成的, 这与现有技术中的流程有所区别。
在现有技术中, DNS中保存的是 APN和 GGSN地址之间的对应关系, 实际 上就是一个数据库, SGSN用 APN做为关键字去查出 GGSN的地址, 因此本发 明中涉及的修改 DNS中的数据, 实际上就是修改这个数据库的配置关系, 比如 原来是的配置关系可能是 apnl< -〉地址 1 , 那么我们的方案把它修改为 apnl< -〉 地址 2, 通过修改 DNS中的 APN配置数据, 即可以实现本发明需要的地址的 解析。
在本发明中, 该智能 GGSN转发给普通 GGSN的激活请求消息是符合 GTP 协议标准的激活请求消息。
本发明中, 还要求普通 GGSN激活成功之后返回的激活响应消息能够被 SGSN接受。
同时为了减少网络流量开销, 还应该尽量满足智能 GGSN只转发普通用户的 激活信令消息而不需要转发用户数据流。
下面再结合一个具体的处理流程来说明本发明的具体实施方式。 如图 8所示, 是一个经过智能 GGSN转发的激活流程图, 在这个解决方案 中, 智能 GGSN同时提供 GPRS智能功能以及激活请求 /响应消息的代理转发功 能, 我们将其简称为 PPS&PROXY GGSN。
假设 SGSN的 Gn口地址为 A;
假设 PPS&PROXY GGSN的 Gn口地址为 B;
假设普通 GGSN的 Gn口地址为 C:。
则该流程详细描述如下:
1、 MS发送激活 PDP上下文请求消息给 SGSN;
2、 SGSN通过 DNS解析, 发送激活请求消息给 PPS&PROXY GGSN:
其中 IP头中源地址为 SGSN Gn口地址 A, 目的地址为 PPS&PROXY GGSN的 Gn口地址 B, 激活请求消息中包含两个信元: "SGSN Address for signalling" 和 "SGSN Address for user traffic" , 分别代表该 PDP上下文使用的 SGSN信令地址 和数据地址, 其值为 SGSN Gn口地址 A, 该消息关键信息如下:
IP header: A -〉 B
SGSN Address for signalling: A
SGSN Address for user traffic: A
3、 PPS&PROXY GGSN接收到激活请求消息:
首先判断是否是智能用户激活, 如果智能用户激活, 则由本 GGSN自己处 理; 如果是非智能用户, 则向普通 GGSN转发, 其中 IP头中源地址为 PPS&PROXY GGSN的 Gn口地址 B, 目的地址为普通 GGSN的 Gn口地址 C, GTP 包的内容不做任何 改。 激活请求消息中包含的两个信元: "SGSN Address for signalling" 和 "SGSN Address for user traffic" , 分别代表该 PDP上下文使用的 SGSN信令地址和数据地址, 其值仍为 SGSN Gn口地址 A , 该消息关键信息如 下:
IP header: B->C SGSN Address for signalling: A
SGSN Address for user traffic: A
4、 普通 GGSN接收激活请求消息:
普通 GGSN接收到激活请求消息之后将会建立一个 PDP上下文, 根据 GTP协 议, 其中 SGSN信令地址应该为激活请求消息中携带的信元 SGSN Address for signalling: A, SGSN数据地址为消息中携带的信元 SGSN Address for user traffic: A, 并指定 GGSN信令和数据地址为本身的 Gn口地址 C, 然后返回一个 激活响应消息, 根据 GTP协议, 该消息 IP头中源地址应该为普通 GGSN Gn口地 址 C, 目的地址应该为 PPS&PROXY GGSN Gn口地址 B, 激活响应消息中包含 两个信元: " GGSN Address for signalling " 和 " GGSN Address for user traffic" , 分别代表该 PDP上下文使用的 GGSN信令地址和数据地址, 其值为普 通 GGSN Gn口地址 C, 该消息关键信息如下:
IP header: C->B
GGSN Address for signalling: C
GGSN Address for user traffic: C
5、 PPS&PROXY GGSN接收到激活响应消息:
PPS&PROXY GGSN接收到激活响应消息之后向 SGSN转发, 消息 IP头中源 地址为 PPS&PROXY GGSN Gn口地址 B , 目的地址为 SGSN Gn口地址 A , PPS&PROXY GGSN对激活响应消息中的内容不关心也不做任何修改。 如果激 活成功则在激活响应消息中将会包含两个信元: " GGSN Address for signalling" 和 "GGSN Address for user traffic" , 分别代表该 PDP上下文使用的 GGSN信令地址和数据地址, 其值仍为普通 GGSN的 Gn口地址 C, 该消息关键信 息如下:
IP header: B -〉 A
GGSN Address for signalling: C - GGSN Address for user traffic: C
6、 SGSN接收到激活响应消息
建立一个 PDP上下文, 根据 GTP协议, PDP上下文中的 SGSN地址应该是其 自身指定的地址 A, GGSN信令地址应该是激活响应消息中携带的信元 GGSN Address for signalling: C, GGSN数据地址为消息中携带的信元 GGSN Address for user traffic: C;
这样在 SGSN和普通 GGSN之间就建立了一对 PDP上下文, 其中 SGSN地址为 A、 GGSN地址为 C, 相当于就是在人和0之间建立了一条 GTP消息传输的逻辑通 道, 后续的 GTP信令消息以及 GTP数据包, 都是在 SGSN和普通 GGSN之间直接 交互, 不再涉及 PPS&PROXY GGSN。
7、 SGSN向 MS返回一个激活 PDP上下文接受消息, 手机用户收到该消息之 后就可以进行 GPRS业务了。
本发明通过以上这种方案, 可以很好的解决运营商快速升级 GPRS智能网的 问题, 并且完完全全地保护了运营商的既有投资, 提高了网络的利用率。
以上所述, 仅为本发明较佳的具体实施方式, 但本发明的保护范围并不局限 于此, 任何熟悉本技术领域的技术人员在本发明揭露的技术范围内, 可轻易想 到的变化或替换, 都应涵盖在本发明的保护范围之内。 因此, 本发明的保护范 围应该以权利要求书的保护范围为准。

Claims

权 利 要 求 书
1、 一种通用分组无线数据业务 ( GPRS General Packet Radio Service ) 支持 智能业务的方法, 外部网络环境包括网关 GPRS支持节点 (GGSN Gateway GPRS Support Node )和智能 GGSN及服务 GPRS支持节点 ( SGSN Service GPRS Support Node )其特征在于, 将用户激活请求消息首先发往智能 GGSN, 根据智能触发规则判断此激活请求是否是智能用户激活, 如果是, 则由该智能 GGSN处理, 否则将该激活请求转发给普通 GGSN处理。
2、 如权利要求 1所述的 GPRS支持智能业务的方法, 其特征在于所述的智 能判断触发规则, 是判断发出激活请求信息的用户是否是智能用户的规则。
3、 如权利要求 1或 1所述的 GPRS支持智能业务的方法, 其特征在于所述 的用户激活请求消息首先发往智能 GGSN的步骤, 是通过修改域名服务器
( DNS Domain Name Server ) 中的业务数据, 使得同一个接入点名称(APN Access Point Name )解析出来的 GGSN地址为智能 GGSN地址的方式来完成 的。
4、 如权利要求 3所述的 GPRS支持智能业务的方法, 其特征在于所述的智 能 GGSN转发给普通 GGSN的激活请求消息是符合 GTP协议标准的激活请求 消息。
5、 如权利要求 3所述的 GPRS支持智能业务的方法, 其特征在于普通 GGSN激活成功之后返回的激活响应消息能够被 SGSN接受。
6、 如权利要求 3所述的 GPRS支持智能业务的方法, 其特征在于智能 GGSN只转发普通用户的激活信令消息。
PCT/CN2003/000618 2002-09-06 2003-08-01 Procede associe a un service intelligent de soutien de gprs WO2004023735A1 (fr)

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