WO2007109983A1 - Procédé de redistribution de charge dans une configuration a-flex, système et appareil de commutation mobile à cet effet - Google Patents

Procédé de redistribution de charge dans une configuration a-flex, système et appareil de commutation mobile à cet effet Download PDF

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Publication number
WO2007109983A1
WO2007109983A1 PCT/CN2007/000934 CN2007000934W WO2007109983A1 WO 2007109983 A1 WO2007109983 A1 WO 2007109983A1 CN 2007000934 W CN2007000934 W CN 2007000934W WO 2007109983 A1 WO2007109983 A1 WO 2007109983A1
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WIPO (PCT)
Prior art keywords
mobile switching
switching device
base station
station controller
user terminal
Prior art date
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PCT/CN2007/000934
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English (en)
French (fr)
Inventor
Yan Li
Fang You
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.)
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Publication date
Application filed by Huawei Technologies Co. Ltd. filed Critical Huawei Technologies Co. Ltd.
Publication of WO2007109983A1 publication Critical patent/WO2007109983A1/zh
Priority to US12/237,609 priority Critical patent/US20090047949A1/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W28/00Network traffic management; Network resource management
    • H04W28/02Traffic management, e.g. flow control or congestion control
    • H04W28/08Load balancing or load distribution
    • H04W28/0827Triggering entity
    • H04W28/0831Core entity
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W28/00Network traffic management; Network resource management
    • H04W28/02Traffic management, e.g. flow control or congestion control
    • H04W28/08Load balancing or load distribution
    • H04W28/088Load balancing or load distribution among core entities

Definitions

  • the present invention relates to the field of A-Flex technology, and in particular, to a load balancing method, system and mobile switching device under the A-Flex architecture.
  • Iu interface flexibility is one of the circuit domain disaster recovery mechanisms under the existing softswitch architecture.
  • Iu-Flex technology is proposed by 3GPP (3rd Generation Mobile Communication Standard Partner Project) in Release 5, which defines the concept of "pool", which includes multiple RNCs (wireless controllers) / BSCs (base stations) Controller) and a plurality of CN (Core Network) network elements, each of which can connect to a plurality of core network elements.
  • the Iu-Flex mechanism ensures that when a user roams in the area managed by the RC in the pool, all core network processing is processed on a specific CN node in the pool, that is, For a single user, there is only one "home" CN processing node in the pool. There is no concept of CN load sharing. This way, frequent location updates can be avoided. All users in the pool are divided into different "home” CN nodes. Therefore, it is load sharing. This division of the "home" CN node in the user pool should be determined by the RNC when the user first registers in the pool.
  • IMSI-HASH International Mobile Subscriber
  • ID International Mobile Subscriber Identity
  • the NRI contains the CN node information. All subsequent users in the pool.
  • NAS Non Access Stratum non-access stratum
  • NTRI Non Access Stratum non-access stratum
  • the RNC adjusts the user who "homed" the CN node to other CN nodes through a specific algorithm.
  • A-Flex A interface Flexibility
  • BSC mobile switching device
  • the BSC When the user conducts the service in the future, the BSC sends the message to the corresponding MSC according to the IMSI of the message and the load of the MSC in the current pool, because the load condition of the MSC in the pool does not change under normal circumstances, so The message is sent to the MSC that registered the user.
  • the MS mobile terminal
  • the MS can only establish a message through the connection with the IMSI (the connection establishment message includes the location registration request, The originating service request, the called paging response) or the connectionless request message with IMSI, enables the BSC to send these messages to the new MSC according to the IMSI, thereby enabling the user to register to the new MSC, but after establishing the connection relationship,
  • the subsequent message is without IMSI, and the BSC selects the MSC according to the IMSI. If the message does not carry the IMSI, the MSC is selected according to the established connection relationship.
  • the MS also The above message is not sent, so the load re-allocation cannot be implemented. Therefore, the next time the called service is still performed on the original MSC, the purpose of quickly allocating the load cannot be achieved.
  • the object of the present invention is to provide a load redistribution method, system and mobile switching device under the A-Flex architecture, so as to solve the problem that the user cannot migrate from the current MSC to the new MSC after the load balancing is changed after the connection is established in the A-Flex architecture.
  • embodiments of the load redistribution method under the A-FLEX architecture provided by the present invention include:
  • the MSC determines, according to the configuration information, whether the MS needs to migrate out of the control scope of the MSC, and if necessary, proceeds to step b;
  • the MSC sends a registration request message to the BSC, and the BSC instructs the MS to re-register and register to the new MSC.
  • the system embodiment of the load redistribution in the A-FLEX architecture comprises a base station controller, a user terminal registered to the base station controller, and a plurality of mobile switching devices sharing the base station controller, wherein:
  • the switching device determines, according to the configuration information, that the user terminal is Whether it is necessary to migrate out of the control range of the mobile switching device, if necessary, the mobile switching device sends a registration request message to the base station controller, and the base station controller instructs the user terminal to re-initiate registration and register to the new mobile switching device.
  • the embodiment of the mobile switching device in the A-FLEX architecture provided by the present invention includes a load distribution unit, configured to determine, according to the configuration information, whether the user terminal needs to migrate out of the control range of the mobile switching device, and if necessary, send to the base station controller A request message instructing the user terminal to re-register to the new mobile switching device.
  • the embodiment of the present invention can overcome the deficiencies of the prior art.
  • the original MSC actively requests the MS to re-register the location to the new MSCo after the service is completed, so that the MSC can load the MSC under high load.
  • the user can migrate to the new MSC at the same time, so that the load of the MSC can be reduced as soon as possible, so that the load of the MSC can be rebalanced, and the user can only perform certain services when the load balancing changes in the prior art.
  • the limitation of migrating to the new MSC reduces the possibility that subsequent services will still be further deteriorated in the original MSC due to the original MSC.
  • Figure 1 is an A-Flex architecture diagram
  • FIG. 3 is a flowchart of Embodiment 2 of the present invention.
  • the basic principle of the embodiment of the present invention is: when the service needs to redistribute the load, the original MSC generates configuration information according to the current load situation or external indication that needs to be redistributed, and the configuration information includes those users who need to migrate out of the original MSC, in order to maintain Service Continuity, the original MSC continues to complete the current service. After the service is completed, the MSC determines whether the MS needs to migrate out of the MSC according to the configuration relationship. If migration is required, the MSC sends a location registration request to the BSC where the user is currently located, and notifies the MS to re-initiate the location. Registration, the BSC registers the MS to another MSC according to the IMSI (International Mobile Subscriber Identity) of the MS and the load condition of the MSC.
  • IMSI International Mobile Subscriber Identity
  • An embodiment of the system for load redistribution under the A-FLEX architecture provided by the embodiment of the present invention includes a base station controller, a user terminal registered to the base station controller, and a plurality of mobile switching devices sharing the base station controller, where The switching device determines, according to the configuration information, whether the user terminal is The control range of the mobile switching device needs to be migrated. If necessary, the mobile switching device sends a registration request message to the base station controller, and the base station controller instructs the user terminal to re-initiate registration and register with the new mobile switching device.
  • the base station controller sends a registration request message to the user terminal through the air interface, the user terminal re-initiates a location registration request to the base station controller, the base station controller selects a new mobile switching device, and the new mobile switching device accepts the user terminal. Registration. Moreover, the location registration request initiated by the user terminal to the base station controller carries the international mobile subscriber identity of the user, and the base station controller associates the international mobile subscriber identity with the current mobile exchange with the base station controller. The new mobile switching device is selected when the device redistributes the load.
  • the mobile switching device includes a load distribution unit, configured to determine, according to the configuration information, whether the user terminal needs to migrate out of the control range of the mobile switching device, and send an indication to the base station controller when needed. The user terminal re-registers the request message to the new mobile switching device.
  • the mobile switching device further includes a configuration information generating unit, configured to determine whether the load needs to be redistributed, for example, before determining whether a user terminal is running, or a user terminal is registering to the mobile switching. Whether the load needs to be redistributed after the device, if necessary, generate configuration information according to external instructions or current load conditions. The generated configuration information is saved in a storage unit of the system. Further description will be made below in conjunction with the specific embodiments and the accompanying drawings.
  • Embodiment 1 A process flow chart of a service ongoing load balancing change is shown in FIG. 2. In FIG. 2, assuming that the MS registers with the MSC1, the following steps are included:
  • MS is registered to MSC1;
  • the calling network sends an initial address message (IAM) to the MSC1, where the IAM message includes the called routing information;
  • IAM initial address message
  • the MSC1 sends a paging message (Paging Request) to the BSC where the user is currently located according to the called routing information in the IAM message;
  • the BSC pages the called user through the paging channel (via the Page Message message);
  • the called user returns a paging response (via a Page Response Message message); 6.
  • the BSC returns the paging response to the MSC1; 7.
  • the MSC1 sends a radio side resource assignment request to the BSC (through an Assignment Request message);
  • the BSC completes the line side resource assignment and returns a resource assignment completion response to the MSC1.
  • the MSC1 returns an address full (ACM) message to the calling side network
  • the MS sends a called response message to the BSC where the user is currently located (through the Connect Order message);
  • the BSC sends a called response message to the MSC.
  • the MSC returns a response to the calling side network (through the A M message);
  • the load balance changes and needs to be redistributed.
  • the MSC needs to be upgraded.
  • the MSC can be manually notified, or the MSC itself can judge the overload and automatically migrate the user.
  • external instructions such as O&M
  • the MSC Indication of the maintenance management system or the MSC generates configuration information according to the current changed load condition, and the configuration information includes which users need to migrate out of the MSC1; for example, the following format can be adopted:
  • the MSC user needs to be migrated out.
  • 460030907556XXX identifies the user IMSI logo belongs to 460030907556000 to 460030907556999 and needs to migrate out of the MSC, 460030907558XXX is similar.
  • the MSC1 determines, according to the configuration information generated in step 13, that the MS needs to migrate out of the MSC1, and sends a registration request message (Regi s tration Reques t) to the BSC where the current user is located, where the message includes the user IMSI identifier, and the cell reported by the user when registering List (Cel l Ident if ier Li st ) and other parameters, the MS is required to re-register the location;
  • a registration request message (Regi s tration Reques t)
  • the BSC sends the message to the corresponding one through the air interface according to the user identifier and the cell list.
  • the MS After receiving the registration request message, the MS completes the location registration operation.
  • the specific location registration operation includes the following steps: 1) The MS sends a registration message to the BSC where the current user is located, where the message carries the IMSI of the user;
  • the BSC receives the registration message, and then according to the IMSI in the message and the load of the MSC currently connected to the BSC (because the 13-step load balancing has changed, the BSC will not select the original MSC1 again) , select an MSC (MSC2 in this example), and send a location update message to it;
  • MSC2 returns a location update registration reception message to the BSC
  • the BSC returns a location update registration reception message to the MS, after which the MS registers with the new MSC, i.e., MSC2, and the subsequent service is performed on the new MSC.
  • the messages of IAM, ACM, ANM, etc. in this embodiment belong to ITU-T (Intemational)
  • the ITU-T ISUP protocol is used as the inter-office call control signaling, but other call control signaling is also possible, such as the ISUP protocol defined by ANSI (American National Standard Institute).
  • the SIP-I protocol defined by the Internet Engineering Task Force (IETF) is ok.
  • the message between the MSC and the BSC uses the A interface protocol defined by 3GPP2, pI0S ⁇ - (Interoperabi ty Specif icat ion for cdma2000 Access Network Interfaces), where the specific message format can be seen.
  • the current version of the protocol is I0S 5. 01.
  • Embodiment 2 The process of the load balancing change processing before the service starts is as shown in FIG. 3, and includes the following steps:
  • the user registers with MSC1;
  • the load balance changes and needs to be redistributed.
  • the MSC generates configuration information according to external indications (such as O&M (Maintenance Management System)) or MSC ⁇ according to the current changed load.
  • the configuration information includes those users. Migrating out MSC1; 3.
  • the service control point (SCP) sends a user location request message to the MSC1;
  • MSC1 returns the location information of the user
  • the MSC1 determines, according to the configuration information generated in step 2, that the user needs to migrate the MSC1, and sends a registration request message to the BSC where the user is currently located, and requests the MS to perform location registration again. 6.
  • the BSC sends the message to the corresponding one through the air interface.
  • Specific location registration operations include:
  • the MS sends a registration message to the current BSC, where the message carries the user's IMSI;
  • the BSC receives the registration message, according to the IMSI in the message and the load status of the MSC currently connected to the BSC (because the load of the step 13 has changed, the BSC will not select the original MSC1 again), and select an MSC. (MSC2 in this example), sending a location update message to it;
  • MSC2 returns a location update reception to the BSC
  • the BSC returns a registration reception message to the MS, after which the MS registers with the new MSC, that is, MSC2, and the subsequent service is performed at the MSC2.

Description

一种 A-Flex架构下负载重新分配方法、 系统和移动交换设备
技术领域
本发明涉及 A-Flex技术领域, 具体来说, 涉及到 A-Flex架构下负载 均衡方法、 系统和移动交换设备。
背景技术
随着通信系统的发展, 安全性是通信运营商们越来越关注的重点, 在 通信系统中, 单点故障造成大面积业务中断对系统安全性影响尤其大, 因 此, 避免单点故障造成的大面积业务中断成为必需要解决的问题。
Iu接口灵活性( Iu-Flex, Iu interface Flexibility )是目前已有的软交换 架构下电路域容灾机制之一。 Iu-Flex技术是 3GPP (第三代移动通信标准 合作伙伴项目)在 Release 5中提出的, 其中定义了"池"的概念, 所述池中 包括多个 RNC (无线控制器) /BSC (基站控制器)以及多个 CN (核心网 络) 网元, 其中的每个 RNC/BSC节点可以连接多个核心网网元。 正常情 况下, Iu-Flex机制通过 N I (网络资源指示)方式保证, 当某个用户在池 内 R C管理的地区内漫游时, 所有的核心网处理过程在池内特定的一个 CN节点上处理, 即对于单个用户而言, 其在池内只有一个 "归属" 的 CN 处理节点, 不存在 CN 负荷分担的概念,这种方式可以避免频繁的位置更 新; 池内所有用户被划分到不同的 "归属" CN节点, 所以是负荷分担的, 这种对用户池内 "归属" CN节点的划分, 应该是在用户初次在这个池内 登记时, 由 RNC 来决定的, 决定的方式是通过 IMSI-HASH ( IMSI ( International Mobile Subscriber Identity 国际移动用户识别码)哈希算法 来完成分配, 将用户注册到特定的 CN节点, 该 CN节点在完成注册后向 用户返回 N I, 该 NRI 包含有该 CN节点信息。 后续用户在池内的所有 NAS ( Non Access Stratum非接入层) 消息中都带有 NTRI, 由 RNC根据 NRI将其发送到 "归属" CN。 异常情况下, 若池内某个 CN节点故障, 则 由 RNC通过特定算法将 "归属" 该 CN节点的用户调整到其它 CN节点。
如附图 1所示,在 CDMA2000无线核心网,也可以部署类似于 Iu-Flex 的机制, 称为 A接口灵活性(A-Flex, A interface Flexibility ), 在该架构 下, BSC被池内所有 MSC (移动交换设备)共享, 当某一用户漫游到池 内某一 BSC (如 BSC0 ),则 BSC根据其注册消息的 IMSI和当前池内 MSC 的负载情况选择一个 MSC, 并将该用户注册到该 MS :。 以后该用户进行 业务时, BSC才艮据其发送消息的 IMSI, 和当前池内 MSC的负载情况, 将 该消息发往对应的 MSC, 因为正常情况下, 池内 MSC的负载情况不会发 生变化, 所以消息会发送到注册该用户的 MSC。
在这种架构下, 当某一 MSC 因为负载过高或者因为维护的缘故, 需 要重新分配负载时, MS (移动终端)只能通过带有 IMSI的连接建立消息 (连接建立消息包括位置登记请求, 始呼业务请求, 被叫寻呼响应)或者 带有 IMSI的无连接请求消息, 才能使 BSC根据 IMSI将这些消息发送到 新的 MSC, 从而使用户注册到新的 MSC, 但是建立连接关系后, 后续消 息是不带有 IMSI的, 而 BSC是根据 IMSI选择 MSC, 如果消息里不带有 IMSI, 则要根据建立的连接关系选择 MSC, 如果连接已经建立或者业务 建立不涉及以上消息, 则 MS也不会发送上述消息, 因此无法实现负载重 新分配, 所以该用户下次被叫业务仍会在原 MSC进行, 无法实现快速分 配负载的目的。
因此, 现有技术还无法解决建立连接后 MSC负载的重新分配问题。 发明内容
本发明的目的在于提供一种 A-Flex架构下负载重新分配方法、系统和 移动交换设备,以解决 A-Flex架构下建立连接后负载均衡发生变化后用户 无法从当前 MSC迁徙到新 MSC, 导致负载不能快速重新分配的问题。
为实现上述目的, 本发明提供的 A-FLEX架构下负载重新分配办法实 施例包括:
a、 MSC根据配置信息判断 MS是否需要迁徙出本 MSC的控制范围, 如果需要则转步骤 b;
b、所述 MSC向 BSC发送注册请求消息, 所述 BSC指示 MS重新发 起注册, 注册到新的 MSC。
本发明提供的 A-FLEX架构下负载重新分配的系统实施例, 包括基 站控制器、登记到该基站控制器的用户终端和共享所述基站控制器的多个 移动交换设备, 其特征在于: 移动交换设备根据配置信息判断用户终端是 否需要迁徙出本移动交换设备的控制范围, 如果需要, 移动交换设备向基 站控制器发送注册请求消息, 所述基站控制器指示用户终端重新发起注 册, 注册到新的移动交换设备。
本发明提供的 A-FLEX架构下的移动交换设备实施例, 包括负载分 配单元, 用于根据配置信息判断用户终端是否需要迁徙出本移动交换设备 的控制范围, 如果需要, 则向基站控制器发送指示用户终端重新注册到新 的移动交换设备的请求消息。
本发明实施例能够克服现有技术的不足, 当业务进行中负载均衡发生 变化情况下, 原 MSC在业务完成后主动要求 MS 重新位置登记到新的 MSCo 可以使 MSC在负载很高的情况下, 最多再执行一次业务就把用户 迁徙到新的 MSC, 从而可以尽快降低本 MSC的负载, 使得 MSC的负载 能够重新均衡, 避免了现有技术中负载均衡发生变化时只有用户进行某些 特定业务才能迁徙到新 MSC的局限性, 从而降低了后续业务仍在原 MSC 进行导致原 MSC负载情况进一步恶化的可能性。
附图说明
图 1为 A-Flex架构图;
图 2为本发明实施例一流程图;
图 3为本发明实施例二流程图。
具体实施方式
本发明实施例的基本原理是: 在业务进行中需要重新分布负载时, 原 MSC根据当前需重新分布的负载情况或者外部指示生成配置信息,该配置 信息包含那些用户需迁徙出原 MSC, 为了保持业务连续性, 原 MSC继续 完成当前业务,业务完成后, MSC根据配置关系判断该 MS是否需要迁徙 出本 MSC,如果需要迁徙,则向用户当前所在的 BSC发送位置登记请求, 通知 MS重新发起位置登记, 所述 BSC根据该 MS的 IMSI (国际移动用 户识别码) 以及 MSC的负载情况, 将 MS注册到另一 MSC。
本发明实施例提供的 A - FLEX架构下负载重新分配的系统实施例, 包 括基站控制器、登记到该基站控制器的用户终端和共享所述基站控制器的 多个移动交换设备, 其中, 移动交换设备根据配置信息判断用户终端是否 需要迁徙出本移动交换设备的控制范围, 如果需要, 移动交换设备向基站 控制器发送注册请求消息, 所述基站控制器指示用户终端重新发起注册, 注册到新的移动交换设备。 该系统中, 基站控制器通过空口发送注册请求 消息给用户终端, 用户终端向基站控制器重新发起位置登记请求, 基站控 制器选择一个新的移动交换设备, 所述新的移动交换设备接受用户终端的 注册。 而且, 所述用户终端向基站控制器发起的位置登记请求中带有用户 的国际移动用户识别码, 所述基站控制器 居所述的国际移动用户识别码 和当前与基站控制器连接的移动交换设备重新分布负载的情况选择新的 移动交换设备。
在上述系统的实施例中, 所述移动交换设备包括一个负载分配单元, 用于根据配置信息判断用户终端是否需要迁徙出本移动交换设备的控制 范围, 以及在需要时, 向基站控制器发送指示用户终端重新注册到新的移 动交换设备的请求消息。 在上述系统的另外实施例中, 所述移动交换设备 还包括一个配置信息生成单元, 用于判断是否需要重新分布负载, 例如, 判断一个用户终端的业务进行前, 或者一个用户终端注册到移动交换设备 后是否需要重新分布负载, 如果需要, 根据外部指示或者当前负载情况生 成配置信息。 所述生成的配置信息保存在系统的存储单元中。 以下结合具 体实施例和附图进行进一步的说明。
实施例一: 业务进行中负载均衡变化的处理流程图如附图 2所示, 图 2中, 假设 MS向 MSC1注册, 包括如下步骤:
1、 MS注册到 MSC1 ;
2、 主叫网络发送初始地址消息 (IAM)到 MSC1 , 所述 IAM消息中 包含被叫路由信息;
3、 MSC1根据所述 IAM消息中的被叫路由信息, 向用户当前所在 的 BSC发送寻呼消息( Paging Request );
4、 所述 BSC通过寻呼信道, 寻呼被叫用户 (通过 Page Message消 息);
5、 被叫用户返回寻呼响应 (通过 Page Response Message消息); 6、 所述 BSC将该寻呼响应返回给 MSC1; 7、 MSC1 向所述 BSC 发送进行无线侧资源指配请求 (通过 Assignment Request消息 );
8、 所述 BSC完成线侧资源指配并向 MSC1返回资源指配完成响应
(通过 Assignment Response 消息 );
9、 MSC1向主叫侧网络返回地址全(ACM ) 消息;
10、 MS 向用户当前所在的 BSC发送被叫应答消息 (通过 Connect Order 消息);
11、 BSC向 MSC发送被叫应答消息;
12、 MSC向主叫侧网络返回应答(通过 A M消息);
13、 通话过程中负载均衡发生变化, 需要重新分布(这里有很多种情 况, 比如 MSC需要维护升级, 此时可以人工通知 MSC迁徙用户, 或者 MSC自身软件判断过载,自动迁徙用户;),则 MSC根据外部指示(如 O&M
(维护管理系统) 的指示)或者 MSC根据当前变化后的负载情况生成配 置信息, 该配置信息包含哪些用户需迁徙出 MSC1; 例如可以采用如下所 示格式:
需迁移出该 MSC用户 IMSI所属号段
460030907556XXX
460030907558XXX
其中, 460030907556XXX标识用户 IMSI标识属于 460030907556000 到 460030907556999都需迁徙出该 MSC, 460030907558XXX类似。
14、 通话结束;
15、 MSC1根据步骤 13生成的配置信息判断该 MS需迁徙出 MSC1 , 则向当 前用户所在的 BSC发送注册请求消息(Regi s tration Reques t ), 消息里包 含用户 IMSI标识, 用户注册时上报的小区列表(Cel l Ident if ier Li s t ) 等参数, 要求 MS重新做位置登记;
16、所述 BSC根据用户标识和小区列表通过空口发送该消息给对应的
MS;
17、 MS 收到该注册请求消息后, 完成位置登记操作。 具体的位置登 记操作包括下述步骤: 1 ) MS发送注册消息给当前用户所在的 BSC, 所述消息中带有用户的 IMSI;
2 )所述 BSC收到该注册消息, 才艮据消'息里的 IMSI和当前与 BSC连 接的 MSC的负载情况(因为 13步负载均衡已发生变化, 因此 BSC不会 再选择到原 MSC1 ), 选择一个 MSC (本例中为 MSC2 ), 向其发送位置更 新消息;
3 ) MSC2向所述 BSC返回位置更新注册接收消息;
4 )所述 BSC向 MS返回位置更新注册接收消息, 此后 MS注册到新 的 MSC, 即 MSC2, 后续业务在新的 MSC进行。
需要说明的是:
1、 本实施例中的 IAM, ACM, ANM等消息属于 ITU- T(Intemational
Telecommunication Union - Telecommunication Standardization Sector, 即国 际电信联盟 -电信标准部定义的 ISUP协议,具体信令格式可参见 ITU-T的
Q.763协议;
2、 本实施例中虽以 ITU-T的 ISUP协议作为局间呼叫控制信令, 但 是其他呼叫控制信令也是完全可以的, 如 ANSI ( American National Standard Institute 美国国家标准组织)定义的 ISUP协议, IETF ( Internet engineering task force因特网工程任务組)定义的 SIP - I协议等都是可以 的。
3、MSC和 BSC之间的消息(如注册请求消息 Connect Order等)使用 3GPP2 定义的 A接口协议, pI0S†^- ( Interoperabi l i ty Specif icat ion for cdma2000 Access Network Interfaces ), 其中具体消息格式可参见该协 议的目前最新版本 I0S 5. 01。
实施例二: 业务开始前负载均衡变化处理的流程如附图 3所示, 包括 如下步骤:
1、 用户注册到 MSC1;
2、 负载均衡发生变化, 需要重新分布, 则 MSC才艮据外部指示(如 O&M (维护管理系统)的指示)或者 MSC ~据当前变化后的负载情况生 成配置信息, 该配置信息包含那些用户需迁徙出 MSC1; 3、 业务控制点 (SCP )发送用户定位请求消息给 MSC1;
4、 MSC1返回该用户的位置信息;
5、 MSC1根据步骤 2所生成的配置信息,判断该用户需迁徙出 MSC1 , 则向用户当前所在的 BSC发送注册请求消息, 要求 MS重新做位置登记; 6、 BSC通过空口发送该消息给对应的 MS;
7、 MS收到该注册请求消息后, 完成新的位置登记操作。 具体的位置 登记操作包括:
1 ) MS发送注册消息给当前所在的 BSC, 消息中带有用户的 IMSI;
2 ) BSC收到该注册消息, ^据消息里的 IMSI和当前与 BSC连接的 MSC的负载情况(因为步骤 13负载均街已发生变化, 因此 BSC不会再选 择到原 MSC1 ), 选择一个 MSC (本例中为 MSC2 ), 向其发送位置更新消 息;
3 ) MSC2向所述 BSC返回位置更新接收;
4 )所述 BSC向 MS返回注册接收消息, 此后 MS注册到新的 MSC, 即 MSC2, 后续业务在 MSC2进行。

Claims

权 利 要 求
1、 一种 A-FLEX架构下负载重新分配方法, 其特征在于, 所述方法 包括以下步驟:
a、 移动交换设备 据配置信息判断用户终端是否需要迁徙出本移动 交换设备的控制范围, 如果需要则转步骤 b;
b、 所述移动交换设备向基站控制器发送注册请求消息, 所述基站控 制器指示用户终端重新发起注册, 注册到新的移动交换设备。
2、 根据权利要求 1所述的方法, 其特征在于, 如果业务进行前需要 重新分布负载, 移动交换设备才艮据外部指示或者当前负载情况生成配置信 息。
3、 根据权利要求 1所述的方法, 其特征在于, 如果用户注册到移动 交换设备后, 在业务进行中需要重新分布负载, 移动交换设备完成所述业 务并才艮据外部指示或者当前负载情况生成配置信息。
4、 根据权利要求 2或者 3所述的方法, 其特征在于, 所述外部指示 为维护管理系统的指示。
5、 根据权利要求 1所述的方法, 其特征在于, 所述配置信息包括需 要迁徙出所述移动交换设备的用户终端信息。
6、 根据权利要求 1 所述的方法, 其特征在于, 基站控制器通过空 口发送注册请求消息给用户终端 ,
用户终端向基站控制器重新发起位置登记请求, 基站控制器选择一个 新的移动交换设备, 所述新的移动交换设备接受用户终端的注册。
7、 根据权利要求 6所述的方法, 其特征在于, 所述用户终端向基站 控制器发起的位置登记请求中带有用户的国际移动用户识别码, 所述基站 控制器根据所述的国际移动用户识别码和当前与基站控制器连接的移动 交换设备重新分布负载的情况选择新的移动交换设备。
8、 一种 A-FLEX架构下负载重新分配系统, 包括基站控制器、 登记 到该基站控制器的用户终端和共享所述基站控制器的多个移动交换设备, 其特征在于: 移动交换设备根据配置信息判断用户终端是否需要迁徙出本 移动交换设备的控制范围, 如果需要, 移动交换设备向基站控制器发送注 册渚求消息, 所述基站控制器指示用户终端重新发起注册, 注册到新的移 动交换设备。
9、 根据权利要求 8所述的系统, 其特征在于, 基站控制器通过空 口发送注册请求消息给用户终端,
用户终端向基站控制器重新发起位置登记请求, 基站控制器选择一个 新的移动交换设备, 所述新的移动交换设备接受用户终端的注册。
10、 根据权利要求 9所述的系统, 其特征在于, 所述用户终端向基站 控制器发起的位置登记请求中带有用户的国际移动用户识别码, 所述基站 控制器根据所述的国际移动用户识别码和当前与基站控制器连接的移动 交换设备重新分布负载的情况选择新的移动交换设备。
11、 一种 A-FLEX架构下的移动交换设备, 其特征在于, 包括负载分 配单元, 用于根据配置信息判断用户终端是否需要迁徙出本移动交换设备 的控制范围, 如果需要, 则向基站控制器发送指示用户终端重新注册到新 的移动交换设备的请求消息。
12、 根据权利要求 11所述的设备, 其特征在于还包括, 配置信息生 成单元, 用于判断是否需要重新分布负载, 如果需要, 根据外部指示或者 当前负载情况生成配置信息。
PCT/CN2007/000934 2006-03-27 2007-03-22 Procédé de redistribution de charge dans une configuration a-flex, système et appareil de commutation mobile à cet effet WO2007109983A1 (fr)

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