WO2011069375A1 - 控制本地交换的方法、装置和系统 - Google Patents

控制本地交换的方法、装置和系统 Download PDF

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Publication number
WO2011069375A1
WO2011069375A1 PCT/CN2010/076192 CN2010076192W WO2011069375A1 WO 2011069375 A1 WO2011069375 A1 WO 2011069375A1 CN 2010076192 W CN2010076192 W CN 2010076192W WO 2011069375 A1 WO2011069375 A1 WO 2011069375A1
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Prior art keywords
user
local exchange
base station
matching information
station controller
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PCT/CN2010/076192
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English (en)
French (fr)
Inventor
刘强
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中兴通讯股份有限公司
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Publication of WO2011069375A1 publication Critical patent/WO2011069375A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/10Reselecting an access point controller

Definitions

  • the present invention relates to the field of communications, and in particular, to a method, apparatus, and system for controlling local switching.
  • Local exchange refers to the way in which the calling and called users do not pass through the core network but directly between the two called base stations.
  • the communication method reduces the occupation of the core network resources, shortens the transmission delay of the voice, saves the use bandwidth of the interface between the base station controller and the base station (Abis interface), and provides convenience for operators and users.
  • the biggest feature of local switching is that user plane data is no longer transmitted directly between the base stations via the core network. When the call is delivered in the above manner, it can be considered to be performed in the local exchange mode.
  • Local switching can be implemented either by means of the core network's Mobile Switching Centre (MSC) or by means of a Base Station Control (BSC).
  • MSC Mobile Switching Centre
  • BSC Base Station Control
  • the local exchange currently implemented is mainly implemented inside the BSC. It is common practice to establish a call resource table at the BSC by extracting information about the number in the SETUP message sent or received by the mobile phone, and perform local exchange matching according to the call resource in the call resource table. This can successfully implement local exchange within a BSC. However, it cannot be achieved when it is between BSCs. The reason is that the BSC can only record the user information of the call or the called party in its own jurisdiction. When two users call within one BSC, the BSC can obtain information such as the calling and called numbers, so that local exchange matching can be performed.
  • 3GPP 3rd Generation Partnership Project
  • the embodiments of the present invention provide a method, an apparatus, and a system for controlling local switching, so as to solve the problem that local switching cannot be implemented across a BSC in the prior art. Specifically, the technical solution of the embodiment of the present invention is as follows:
  • a method for controlling a local exchange when a first user under the first base station controller performs session switching with a second user under the second base station controller, the method includes: the first base station controller to the core network Transmitting a local exchange matching information carrying the first user; the second base station controller acquiring local exchange matching information of the first user from the core network; and after the session handover is successful, the second base station controller The local exchange matching information of the first user is matched with the local exchange matching information of the second user, and if the matching is successful, the local exchange is performed.
  • the step of the first base station controller transmitting the local exchange matching information of the first user to the core network includes: the first base station controller reading local exchange matching information of the first user stored by the first base station controller; A local exchange matching information of a user is carried in the handover requirement message and sent to the core network.
  • the step of the second base station controller acquiring the local exchange matching information of the first user from the core network includes: the second base station controller receiving a handover request message sent by the core network; and the handover request message The local exchange matching information of the first user is parsed and cached. After the session is successfully switched, the method further includes: the second base station controller recording local exchange matching information of the first user.
  • the method further includes: after the session handover fails, the second base station controller clears the channel-related resources prepared for the handover and the local exchange matching information of the first user according to the clear command of the core network.
  • the local exchange matching information includes: local exchange indication information, channel type, channel mode, coded version, and number of the second user.
  • a base station controller comprising: an obtaining module, configured to: obtain local exchange matching information of a user; and generate a module, configured to: fill the user's local exchange matching information into the handover requirement message; and send a module, Set to: Send the switch demand message.
  • a base station controller includes:
  • a storage module configured to: store local exchange matching information of the second user;
  • the receiving module is configured to: receive a handover request message that is sent by the core network and that carries local exchange matching information of the first user; and a parsing module, where: And parsing the local exchange matching information of the first user from the handover request message;
  • the matching module is configured to: after the first user successfully performs session switching to the second user, The exchange matching information is matched with the local exchange matching information of the second user; and the local switching module is configured to: when the matching result of the matching module is successful, perform local exchange.
  • the base station controller further includes: a recording module, configured to: record the local exchange matching information of the first user after the session is successfully switched.
  • the base station controller further includes: And a clearing module, configured to: after the session switching fails, clear the channel-related resources prepared for the handover and the local exchange matching information of the first user according to the clear command of the core network.
  • a system for controlling a local exchange comprising: a first base station controller, configured to: when a first user under the first base station controller performs session switching to a second user under the second base station controller, to the core network And transmitting, by the second base station controller, the second base station controller, configured to: obtain local exchange matching information of the first user from the core network; after the session switching succeeds, the first The local exchange matching information of the user is matched with the local exchange matching information of the second user, and if the matching is successful, the local exchange is performed.
  • the first base station controller sends the local exchange matching information of the first user to the core network; the second base station controller acquires the local exchange matching information of the first user from the core network; The second base station controller matches the local exchange matching information of the first user with the local exchange matching information of the second user. If the matching is successful, the local exchange is performed, and the local exchange can be performed across the BSC, thereby saving the bandwidth resource of the Abis interface. , simple to implement, is conducive to the promotion of business.
  • FIG. 1 is a flowchart of a method for controlling local switching according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a conventional handover message and a handover procedure
  • FIG. 3 is a flowchart of a method for controlling local exchange according to an embodiment of the present invention
  • 4 is a schematic structural diagram of a base station controller according to an embodiment of the present invention
  • FIG. 5 is a schematic structural diagram of another base station controller according to an embodiment of the present invention
  • a structural diagram of the exchanged system
  • the core idea of the present invention is to: transmit the first use of the first base station controller to the core network.
  • the second base station controller obtains the local exchange matching information of the first user from the core network; after the session handover succeeds, the second base station controller matches the local exchange matching information of the first user with the second user The local exchange matching information is matched. If the matching is successful, the local exchange is performed, so that local switching can be performed across the BSC, which saves bandwidth resources of the Abis interface.
  • the technical solution of the invention is simple to implement and is beneficial to the promotion of the business.
  • the technical solution of the present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments.
  • the embodiment of the present invention provides a method for controlling local switching. When the first user under the first base station controller performs session switching to the second user under the second base station controller, as shown in FIG. 1, the method includes: The first base station controller sends the local exchange matching information carrying the first user to the core network;
  • the second base station controller acquires local exchange matching information of the first user from the core network.
  • the second base station controller matches the local exchange matching information of the first user with the local exchange matching information of the second user.
  • the step of the first base station controller transmitting the local exchange matching information of the first user to the core network includes: the first base station controller reads the local exchange matching information of the first user stored by the first base station; The local exchange matching information is carried in the handover request message and sent to the core network.
  • the step of the second base station controller acquiring the local exchange matching information of the first user from the core network includes: receiving, by the second base station controller, a handover request message sent by the core network; and parsing the locality of the first user from the handover request message Exchange matching information and cache. Further, after the session is successfully switched, the method further includes: the second base station controller recording local exchange matching information of the first user.
  • the method further includes: After the session handover fails, the second base station controller clears the channel-related resources prepared for the handover and the local exchange matching information of the first user according to the clear command of the core network.
  • the local exchange matching information includes: local exchange indication information, channel type, channel mode, coded version, and number of the second user.
  • the BSC1 and BSC2 switch BSC1 and BSC2 are related to the information exchange process before the handover implementation.
  • the application scenario is that the base transceiver station (BTS) of the calling subscriber A under the BSC1 is ready to switch to the BTS2 under the BSC2.
  • BTS base transceiver station
  • the interaction process includes:
  • the BSC1 After receiving the measurement report (Measure Report) message sent by the mobile phone (User A) through the BTS1, the BSC1 makes a decision to switch to the BSC2.
  • the BSC1 sends a Handover Required message to the MSC, requests to switch to the BSC2, and informs the MSC about the condition of the allocated wireless resource of the originating mobile phone, the cell identity, and the reason for the handover by using the handover request message.
  • the MSC receives the Handover Required message, sends a Handover Request message to the target BSC2, and notifies the other party that the mobile phone identity, the cell identity, and the MSC can allocate resources.
  • the BSC2 receives the Handover Request message, and after the channel is activated by the channel active (Channel Active) message and the channel active acknowledgement (Channel Active Ack) message, returns a Handover Request Ack message to the MSC, and informs the switchable Channel condition.
  • Channel Active Channel Active
  • Channel Active Ack Channel Active acknowledgement
  • the MSC After receiving the Handover Request Ack message, the MSC sends a Handover Command message to the BSC1.
  • the BSC After receiving the Handover Command message, the BSC sends a Handover Command message to the user A to notify the target cell and the channel of the mobile phone handover. Finally, User A switches after receiving the Handover Command message.
  • the embodiment of the present invention improves the old base station (BSS) to the new BSS information unit (BBS to New BSS Information Elements) in the Handover Request message and the Handover Required message.
  • BSS base station
  • BSS new BSS information unit
  • Old BSS to New BSS Information Unit represents Old BSS to New BSS Information elements to transfer content.
  • Old BSS to New BSS Information elements can be set as needed.
  • the Old BSS to New BSS Information unit shown in Table 2 is taken as an example for detailed description. However, the scope of protection of the present invention is not limited thereto.
  • the Old BSS to New BSS Information unit is an encoding format that can be used to pass local exchange related information.
  • Table 2 Old BSS to New BSS Information Unit
  • Called number The called number of the user.
  • Called number The called number of the user.
  • a Local Switch Element identifier is used to indicate that the information is locally exchanged related content.
  • the length (length) of the local switching unit which identifies the content length of this information unit.
  • Embodiments of the present invention are described below in conjunction with FIG. 3 and the modified Old BSS to New BSS Information unit.
  • the application scenario of this example is that user A calls BTS2 user B located under BSC2 through BTS1 and BSC1.
  • BSC1 records local exchange matching information in the global call resource table, including: User B's number, user A's channel type, channel mode, and user A's coded version, etc.
  • BSC2 records local exchange matching information in the global call resource table, including: the number of the called user B, the channel type of user B, and the channel.
  • BSC1 After receiving the measurement of user A, BSC1 makes a decision to switch to BSC2.
  • the BSC1 sends a Handover Required message of the user A's local exchange matching information to the MSC. Specifically, when the user A has externally cut out, the BSC1 exchanges the matching information in the Handover Required message, including: the number of the called user B, the channel type of the user A, the coded version of the user A, and the channel of the user A. For details about the mode and local exchange information element identifiers, refer to the structure of the Old BSS to New BSS Information unit shown in Table 2, and details are not described here.
  • the BSC1 sends a Handover Required message filling the user's local exchange matching information to the MSC.
  • the MSC receives the Handover Required message, and sends the carrying user to the target BSC2.
  • the Handover Request message of A's local exchange matching information Specifically, the MSC directly writes the content in the Old BSS to New BSS Information unit in the Handover Required message to the Old BSS to New BSS Information unit in the Handover Request message; 504, the BSC2 receives the Handover Request message, and exchanges the information locally.
  • the local exchange matching information of the user is parsed and cached. Specifically, when parsing the Old BSS to New BSS Information information element, the BSC2 needs to determine whether there is a local exchange information element identifier. If so, the user A's local exchange matching information is cached. 505, BSC2 confirms by channel activation (Channel Active) message and channel activation (Channel
  • the BSC2 replies to the MSC with a Handover Request Ack message to inform the switchable channel condition.
  • the MSC After receiving the Handover Request Ack message, the MSC sends a Handover Command message to the BSC1.
  • step 508 After receiving the handover command (Handover Command) message, the BSC1 sends a handover Handover Command message to the user A through the BTS1 to notify the mobile phone of the target cell and the channel. If the handover fails, step 509 is performed, and if the handover is successful, step 511 is performed;
  • user A After determining that the handover fails, user A sends a handover failure message to BSC1 via BTS1. 510.
  • the BSC1 informs the MSC of the handover failure message.
  • the MSC sends a clear command to BSC2.
  • BSC2 clears the channel prepared for switching in BSC2 according to this command. At this time, the local exchange matching information of the user A transmitted by the cached BSC1 is also cleared, and the process ends.
  • the BSC2 After receiving the Handover Command message, user A performs handover, and after the handover succeeds, sends a handover success command, and informs BSC2 of the handover success message through BTS2. 512.
  • the BSC2 learns that the handover is successful, it detects whether the local exchange matching information of the user A matches the local exchange matching information of the user B, and if yes, performs local exchange conversion.
  • the method for matching the BSC2 may be: determining whether the local exchange matching information of the user A and the user B has the same number of the called user B, and if so, further determining whether the user A and the user B exchange matching information have the same channel type. , channel mode, encoding format, etc., if any, it is determined that the matching is successful. If the match is successful, the call is transferred from the original legacy mode to the local exchange mode.
  • the embodiment of the present invention further provides a base station controller, as shown in FIG. 4, comprising: an obtaining module, configured to: obtain local exchange matching information of a user; and generate a module, where: the setting is:: matching local exchange information of the user Filling in the handover requirement message; and sending module, which is set to: send the handover requirement message.
  • the local exchange matching information includes: local exchange indication information, channel type, channel mode, coded version, and number of the second user.
  • the embodiment of the present invention further provides a base station controller, as shown in FIG. 5, including:
  • a storage module configured to: store local exchange matching information of the second user; the receiving module is configured to: receive a handover request message that is sent by the core network and that carries local exchange matching information of the first user; and a parsing module, where: The local exchange matching information of the first user is parsed from the handover request message, and the matching module is configured to: after the first user successfully performs session switching to the second user, match the local exchange of the first user The information is matched with the local exchange matching information of the second user.
  • the local switching module is configured to: when the matching result of the matching module is successful, perform local exchange.
  • the base station controller further includes: The recording module is configured to: when the session is successfully switched, record the local exchange matching information of the first user.
  • the base station controller further includes: a clearing module, configured to: after the handover fails, clear the channel related resource prepared for the handover and the local exchange of the first user according to the clear command of the core network Match information.
  • the local exchange matching information includes: local exchange indication information, channel type, channel mode, coded version, and number of the second user.
  • the embodiment of the present invention further provides a system for controlling local switching.
  • the method includes: a first base station controller, configured to: when a first user under the first base station controller is directed to the second base station controller When the second user performs session switching, sending the local exchange matching information carrying the first user to the core network; and the second base station controller is configured to: obtain the local exchange matching information of the first user from the core network; After the handover is successful, the local exchange matching information of the first user is matched with the local exchange matching information of the second user. If the matching is successful, the local exchange is performed.
  • the local exchange matching information includes: local exchange indication information, channel type, channel mode, coded version, and number of the second user.

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Description

控制本地交换的方法、 装置和系统
技术领域 本发明涉及通信领域,特别涉及一种控制本地交换的方法、装置和系统。
背景技术
目前不少通信系统都应用了本地交换功能。 本地交换指: 主被叫用户在 符合一定条件下, 其通话不再经过核心网, 而直接在主被叫两个基站之间进 行的方式。 这种通信方式减少了对核心网资源的占用, 缩短了语音的传输时 延, 节约了基站控制器和基站之间的接口 (Abis接口)等使用带宽, 为运营 商和用户都提供了方便。 本地交换最大的特点是: 用户面数据不再经由核心 网传送而直接在基站间进行。 当通话釆用上述方式进行传递时, 可以认为是 在本地交换模式下进行。 本地交换既可以借助核心网的移动交换中心 ( Mobile Switching Centre , MSC )来实现, 也可以借助基站控制器( Base Station Control, BSC )来实现。 目前, 在新的关于本地交换的三代合作伙伴计划(3rd Generation Partnership Project, 3GPP)标准出来之前, 很少使用 MSC来完成本地交换应用。 目前实 现的本地交换主要是在 BSC内部实现。 普遍的做法是, 在 BSC通过提取手 机发送或接收的启动 (SETUP ) 消息中关于号码的信息来建立呼叫资源表, 根据呼叫资源表中的呼叫资源进行本地交换的匹配。 这样可以成功地在一个 BSC内部实现本地交换。 但是在跨 BSC之间时却无法实现。 原因是 BSC只 能记录在自己管辖区内的进行呼叫或被叫的用户信息。 当两个用户在一个 BSC内部呼叫时, BSC可以获取主被叫号码等信息, 从而可进行本地交换匹 配。 但是, 当两个用户分布在不同 BSC下, 且其中一个用户通过切换来到另 一个用户所在的 BSC下时, BSC不能获取前一用户的呼叫号码信息等可用 于本地交换匹配的信息, 因而不能进行本地交换匹配。 于是常常出现符合本 地交换条件却不能匹配的情况,从而不能更有效地緩解 Abis接口资源,因此, 需要针对跨 BSC实现本地交换提供解决方案。 发明内容 本发明实施例提供了一种控制本地交换的方法、 装置和系统, 以解决现 有技术中跨 BSC不能实现本地交换的问题。 具体地, 本发明实施例的技术方案如下:
一种控制本地交换的方法, 当第一基站控制器下的第一用户向第二基站 控制器下的第二用户进行会话切换时, 所述方法包括: 所述第一基站控制器向核心网发送携带第一用户的本地交换匹配信息; 所述第二基站控制器从所述核心网获取第一用户的本地交换匹配信息; 以及 在会话切换成功后, 所述第二基站控制器将所述第一用户的本地交换匹 配信息与所述第二用户的本地交换匹配信息进行匹配, 如果匹配成功, 则进 行本地交换。 所述第一基站控制器向核心网发送携带第一用户的本地交换匹配信息的 步骤包括: 所述第一基站控制器读取自身存储的第一用户的本地交换匹配信息; 以 及 将所述第一用户的本地交换匹配信息携带在切换需求消息中发送给所 述核心网。 所述第二基站控制器从所述核心网获取第一用户的本地交换匹配信息的 步骤包括: 所述第二基站控制器接收所述核心网发送的切换请求消息; 以及 从所述切换请求消息解析出所述第一用户的本地交换匹配信息,并緩存。 在会话切换成功后, 该方法还包括: 所述第二基站控制器记录所述第一用户的本地交换匹配信息。 该方法还包括: 所述第二基站控制器在会话切换失败后, 根据所述核心网的清除命令清 除为切换准备的信道相关资源和所述第一用户的本地交换匹配信息。 所述本地交换匹配信息包括: 本地交换指示信息、信道类型、信道模式、 编码版本和第二用户的号码。 一种基站控制器, 包括: 获取模块, 其设置为: 获取用户的本地交换匹配信息; 生成模块, 其设置为: 将用户的本地交换匹配信息填入到切换需求消息 中; 以及 发送模块, 其设置为: 发送所述切换需求消息。 一种基站控制器, 包括:
存储模块, 其设置为: 存储第二用户的本地交换匹配信息; 接收模块, 其设置为: 接收核心网发送的携带第一用户的本地交换匹配 信息的切换请求消息; 解析模块, 其设置为: 从切换请求消息解析出所述第一用户的本地交换 匹配信息; 匹配模块, 其设置为: 当所述第一用户向所述第二用户进行会话切换成 功后, 将所述第一用户的本地交换匹配信息与所述第二用户的本地交换匹配 信息进行匹配; 以及 本地交换模块, 其设置为: 当所述匹配模块的匹配结果为成功时, 则进 行本地交换。 该基站控制器还包括: 记录模块, 其设置为: 当会话切换成功后, 记录所述第一用户的本地交 换匹配信息。 该基站控制器还包括: 清除模块, 其设置为: 当会话切换失败后, 根据所述核心网的清除命令 清除为切换准备的信道相关资源和所述第一用户的本地交换匹配信息。 一种控制本地交换的系统, 包括: 第一基站控制器, 其设置为: 当第一基站控制器下的第一用户向第二基 站控制器下的第二用户进行会话切换时, 向核心网发送携带第一用户的本地 交换匹配信息; 以及 所述第二基站控制器, 其设置为: 从所述核心网获取第一用户的本地交 换匹配信息; 在会话切换成功后, 将所述第一用户的本地交换匹配信息与所 述第二用户的本地交换匹配信息进行匹配 ,如果匹配成功,则进行本地交换。 在本发明实施例中, 通过第一基站控制器向核心网发送携带第一用户的 本地交换匹配信息; 第二基站控制器从核心网获取第一用户的本地交换匹配 信息; 在会话切换成功后, 第二基站控制器将第一用户的本地交换匹配信息 与第二用户的本地交换匹配信息进行匹配;如果匹配成功,则进行本地交换, 可以实现跨 BSC进行本地交换, 节约了 Abis口带宽资源, 实现简单, 有利 于业务的推广。
附图概述 图 1是本发明实施例提供的控制本地交换的方法的流程图; 图 2是传统的切换消息和切换流程的流程图; 图 3是本发明实施例提供的控制本地交换的方法的详细流程图; 图 4是本发明实施例提供的基站控制器的结构示意图; 图 5是本发明实施例提供的另一种基站控制器的结构示意图; 图 6是本发明实施例提供的控制本地交换的系统的结构图;
本发明的较佳实施方式 本发明的核心思想在于: 通过第一基站控制器向核心网发送携带第一用 户的本地交换匹配信息; 第二基站控制器从核心网获取第一用户的本地交换 匹配信息; 在会话切换成功后, 第二基站控制器将第一用户的本地交换匹配 信息与第二用户的本地交换匹配信息进行匹配; 如果匹配成功, 则进行本地 交换, 从而可以实现跨 BSC进行本地交换, 节约了 Abis口带宽资源。 本发 明的技术方案实现简单, 有利于业务的推广。 下面结合附图及优选实施方式对本发明技术方案进行详细说明。 本发明实施例提供了一种控制本地交换的方法, 当第一基站控制器下的 第一用户向第二基站控制器下的第二用户进行会话切换时, 如图 1所示, 包 括: 101 , 第一基站控制器向核心网发送携带第一用户的本地交换匹配信息;
102, 第二基站控制器从核心网获取第一用户的本地交换匹配信息;
103 ,在会话切换成功后,第二基站控制器将第一用户的本地交换匹配信 息与第二用户的本地交换匹配信息进行匹配;
104, 如果匹配成功, 则进行本地交换。 进一步地, 第一基站控制器向核心网发送携带第一用户的本地交换匹配 信息的步骤包括: 第一基站控制器读取自身存储的第一用户的本地交换匹配信息; 以及 将第一用户的本地交换匹配信息携带在切换需求消息中发送给核心网。 进一步地, 第二基站控制器从核心网获取第一用户的本地交换匹配信息 的步骤包括: 第二基站控制器接收核心网发送的切换请求消息; 以及 从切换请求消息解析出第一用户的本地交换匹配信息, 并緩存。 进一步地, 在会话切换成功后, 还包括: 第二基站控制器记录第一用户的本地交换匹配信息。 进一步地, 该方法还包括: 第二基站控制器在会话切换失败后, 根据所述核心网的清除命令清除为 切换准备的信道相关资源和所述第一用户的本地交换匹配信息。 进一步地, 本地交换匹配信息包括: 本地交换指示信息、 信道类型、 信 道模式、 编码版本和第二用户的号码。
下面通过一个具体的示例对本发明实施例进行详细的描述, 但该示例并 不构成对本发明保护范围的限制。 为了更好的理解本发明, 先描述传统的跨
BSC的切换的 BSC1和 BSC2在切换实施前的相关信息交互流程, 其应用场 景是主叫用户 A在 BSC1下的基站收发台( Base Transceiver Station, BTS ) 1 准备向 BSC2下的 BTS2切换。 如图 2所示, 该交互流程包括:
201 , 在 BSC1 收到手机 (用户 A ) 通过 BTS1 发送的测量报告 ( Measurement Report ) 消息后, 进行向 BSC2切换的决策。
202, BSC1向 MSC发送切换需求(Handover Required ) 消息, 请求向 BSC2切换,并通过该切换需求消息告知 MSC关于发起手机的已分配无线资 源的情况、 小区标识和切换原因。
203 , MSC接收到 Handover Required消息, 发送切换请求(Handover Request )消息给目标 BSC2 , 将要切换手机标识、 小区标识以及 MSC可进行 分配资源情况告知对方。
204 , BSC2接收到 Handover Request消息,通过信道激活( Channel Active ) 消息和信道激活确认(Channel Active Ack ) 消息准备好信道后, 向 MSC回 复切换请求确认 ( Handover Request Ack ) 消息, 告知其可切换的信道情况。
205 , MSC收到 Handover Request Ack消息后, 给 BSC1发送切换命令 ( Handover Command ) 消息。
206, BSC1收到切换命令 ( Handover Command ) 消息后, BSC再给用 户 A下发切换 Handover Command消息告知手机切换的目标小区和信道的情 况。 最后, 用户 A收到 Handover Command消息后进行切换。 为了解决本地跨 BSC 的本地交换的问题, 本发明实施例对 Handover Request消息和 Handover Required消息中的旧基站 ( Base Station, BSS )到 新 BSS信息单元( Old BSS to New BSS Information Elements )进行改进, 用 以传递源 BSC给目标 BSC的信息, 其具体的结构如表 1所示。 表 1: Old BSS to New BSS Information Elements结构
7 5 5 4 3 2 i I
Ele mant identif ier j octet 1
Length 1 octet 2
Old E£≤ tc He ESS inf ortnation element s j o tet -n 其中 , Element Identifier表示 Old BSS to New BSS Information Element 的标识, Length表示 Old BSS to New BSS Information elements的长度, Old BSS to New BSS information elements表示 Old BSS to New BSS Information elements传送内容。 Old BSS to New BSS Information elements传送内容和长 度可以根据需要进行设定。 下面以表 2 所示的 Old BSS to New BSS Information单元为例进行详细描述, 但本发明的保护范围并不以此为限。 该 Old BSS to New BSS Information单元为可以釆用的一种用于传递本地交换 相关信息的编码格式。 表 2: Old BSS to New BSS Information单元
Local Switch Element identifier octet 1
Length octet 2
Local Switch Cause Channel Type Codec Version Channel Mode octet 3
Called number octet 4 其中
1)信道类型 ( Channel Type ) : 占用 2 bit, 0: TCHF; 1 : TCHH。
2)信道模式 ( Channel Mode ) : 占用 2 bit, 0: 信令 ( Signaling ) ; 语音 ( Speech ) 。 3)编码版本( Codec Version ) : 0: 普通模式; 1 : 本地交换模式, 可以 占用 2 bit。
4)本地交换原因 ( Local Switch Cause ) : 0: 正常(非本地交换) ; 1 : 由于呼叫发起; 2: 由于切换发起; 可以占用 l~7bit。
5)被叫号码( Called number ) : 本用户的被叫号码。 6 )本地交换信息元素标识( Local Switch Element identifier ) , 用于表示 该信息是本地交换相关内容。
7 )本地交换单元的长度 ( length ) , 标识本信息单元的内容长度。 下面结合图 3以及改进后的 Old BSS to New BSS Information单元对本 发明实施例进行描述。 本示例的应用场景是用户 A通过 BTS1和 BSC1呼叫 位于 BSC2下的 BTS2的用户 B,在用户 A和用户 B建立会话过程中, BSC1 在全局呼叫资源表中记录本地交换匹配信息, 包括: 被叫用户 B的号码、 用 户 A的信道类型、 信道模式和用户 A的编码版本等; BSC2在全局呼叫资源 表中记录本地交换匹配信息, 包括:被叫用户 B的号码、用户 B的信道类型、 信道模式和用户 B的编码版本等, 其中, 全局呼叫资源表是为了描述需要, 本发明的保护范围并不限于此,也可以通过其他方式记录本地交换匹配信息。 具体地, 如图 3所示,
501 , BSC1收到用户 A的测量 ^艮告后进行向 BSC2切换的决策。
502 , BSC1向 MSC发送用户 A的本地交换匹配信息的 Handover Required 消息。 具体地, BSC1在用户 A有外部切出时, 在该 Handover Required消息中 的本地交换匹配信息, 包括: 被叫用户 B的号码、 用户 A的信道类型、 用户 A的编码版本、 用户 A的信道模式和本地交换信息元素标识等, 详细的内容 可以参见表 2所示的 Old BSS to New BSS Information单元的结构,在此不再 赘述。 BSC1将填入用户 Α的本地交换匹配信息的 Handover Required消息发 送给 MSC。
503 , MSC接收到 Handover Required消息, 向目标 BSC2发送携带用户 A的本地交换匹配信息的 Handover Request 消息。 具体地, MSC 将 Handover Required 消息中 Old BSS to New BSS Information单元中的内容直接写入 Handover Request消息中的 Old BSS to New BSS Information单元中; 504 , BSC2接收到 Handover Request消息, 经对本地交换信息元素标识 的判断并确认后, 解析出用户 Α的本地交换匹配信息, 并緩存。 具体地, BSC2在解析 Old BSS to New BSS Information信息单元时, 需 要判断是否有本地交换信息元素标识。 如果有, 则緩存用户 A的本地交换匹 配信息。 505 , BSC2通过信道激活( Channel Active )消息和信道激活确认( Channel
Active Ack ) 消息准备好信道资源。
506, BSC2向 MSC回复 Handover Request Ack消息, 告知其可切换的 信道情况。
507 , MSC收到 Handover Request Ack消息后给 BSC1发送切换命令 ( Handover Command ) 消息。
508, BSC1收到切换命令(Handover Command )消息后, BSC1通过 BTS1 给用户 A下发切换 Handover Command消息告知手机切换的目标小区和信道 的情况。 如果切换失败, 则执行步骤 509, 如果切换成功, 则执行步骤 511 ;
509, 在判断切换失败后, 用户 A经 BTS1向 BSC1发送切换失败消息。 510, BSC1将切换失败消息告知 MSC。 MSC给 BSC2下发清除命令,
BSC2根据该命令清除 BSC2 中为切换准备的信道。 此时, 也清除了緩存的 BSC1传送的用户 A的本地交换匹配信息, 结束。
511 , 用户 A收到 Handover Command消息后进行切换, 切换成功后发 送切换成功命令, 并通过 BTS2告知 BSC2切换成功消息。 512, 当 BSC2得知本次切换成功后, 则检测用户 A的本地交换匹配信 息和用户 B的本地交换匹配信息是否匹配, 如果是, 则进行本地交换转换。 BSC2进行匹配的方法可以是, 判断用户 A和用户 B的本地交换匹配信 息是否有相同的被叫用户 B的号码, 如果有, 则进一步判断用户 A和用户 B 交换匹配信息是否有相同的信道类型、 信道模式、 编码格式等, 如果有, 则 确定匹配成功。 如果匹配成功, 通话则从原来的传统模式转入到本地交换模 式。
本发明实施例还提供了一种基站控制器, 如图 4所示, 包括: 获取模块, 其设置为: 获取用户的本地交换匹配信息; 生成模块, 其设置为: 将用户的本地交换匹配信息填入到切换需求消息 中; 以及 发送模块, 其设置为: 发送所述切换需求消息。 其中, 本地交换匹配信息包括: 本地交换指示信息、 信道类型、 信道模 式、 编码版本和第二用户的号码。
本发明实施例还提供了一种基站控制器, 如图 5所示, 包括:
存储模块, 其设置为: 存储第二用户的本地交换匹配信息; 接收模块, 其设置为: 接收核心网发送的携带第一用户的本地交换匹配 信息的切换请求消息; 解析模块, 其设置为: 从切换请求消息解析出所述第一用户的本地交换 匹配信息; 匹配模块, 其设置为: 当所述第一用户向所述第二用户进行会话切换成 功后, 将第一用户的本地交换匹配信息与第二用户的本地交换匹配信息进行 匹配; 本地交换模块, 其设置为: 当匹配模块的匹配结果为成功时, 则进行本 地交换。 进一步地, 该基站控制器还包括: 记录模块, 其设置为: 当会话切换成功后, 记录第一用户的本地交换匹 配信息。 进一步地, 该基站控制器还包括: 清除模块, 其设置为: 在当会话在切换失败后, 根据所述核心网的清除 命令清除为切换准备的信道相关资源和所述第一用户的本地交换匹配信息。 其中, 本地交换匹配信息包括: 本地交换指示信息、 信道类型、 信道模 式、 编码版本和第二用户的号码。
本发明实施例还提供了一种控制本地交换的系统, 如图 6所示, 包括: 第一基站控制器, 其设置为: 当第一基站控制器下的第一用户向第二基 站控制器下的第二用户进行会话切换时, 向核心网发送携带第一用户的本地 交换匹配信息; 以及 第二基站控制器, 其设置为: 从核心网获取第一用户的本地交换匹配信 息; 在会话切换成功后, 将第一用户的本地交换匹配信息与第二用户的本地 交换匹配信息进行匹配, 如果匹配成功, 则进行本地交换。 其中, 本地交换匹配信息包括: 本地交换指示信息、 信道类型、 信道模 式、 编码版本和第二用户的号码。 以上所述, 仅为本发明的较佳实施例而已, 并非用来限定本发明的保护 范围。 本领域内技术人员应该能够联想到, 使用其它移动通信系统, 比如手 持电话系统( Personal Handy Phone System, PHS )、码分多址( Code Division Multiple Access , CDMA )或其他 3G移动通信系统等 , 都应该属于本发明 的保护范围之内。
本领域普通技术人员可以理解上述方法中的全部或部分步骤可通过程序 来指令相关硬件完成, 所述程序可以存储于计算机可读存储介质中, 如只读 存储器、 磁盘或光盘等。 可选地, 上述实施例的全部或部分步骤也可以使用 一个或多个集成电路来实现。 相应地, 上述实施例中的各模块 /单元可以釆用 硬件的形式实现, 也可以釆用软件功能模块的形式实现。 本发明不限制于任 何特定形式的硬件和软件的结合。
上述说明示出并描述了本发明的一个优选实施例, 但如前所述, 应当理 解本发明并非局限于本文所披露的形式, 不应看作是对其他实施例的排除, 而可用于各种其他组合、 修改和环境, 并能够在本文所述发明构想范围内, 通过上述教导或相关领域的技术或知识进行改动。 而本领域人员所进行的改 动和变化不脱离本发明的精神和范围, 则都应在本发明所附权利要求的保护 范围内。
工业实用性 本发明实施例的技术方案有以下优点;
( 1 )可以将同一个 BSC下所有用户进行本地交换匹配, 大大降低了本 BSC的 Abis接口流量, 进一步节约了 BSC下 Abis口带宽资源。 ( 2 )扩大了本地交换的应用范围。 现有技术中, 用户只能在一个 BSC 始呼或被呼才有可能进行本地交换应用, 而在本发明实施例的技术方案中即 使用户移动到别的本设备商生产的 BSC下,在保证有同样的处理机制时, 同 样可以启动本地交换应用, 有利于业务的推广。
( 3 )不需要增加现有 MSC处理的 A口新消息或新增消息单元, 而是利 用现有流程和消息就达到了扩展本地交换的应用范围目的, 实现简单。

Claims

权 利 要 求 书
1、一种控制本地交换的方法, 其特征在于, 当第一基站控制器下的第一 用户向第二基站控制器下的第二用户进行会话切换时, 所述方法包括: 所述第一基站控制器向核心网发送携带第一用户的本地交换匹配信息; 所述第二基站控制器从所述核心网获取第一用户的本地交换匹配信息; 以及 在会话切换成功后, 所述第二基站控制器将所述第一用户的本地交换匹 配信息与所述第二用户的本地交换匹配信息进行匹配, 如果匹配成功, 则进 行本地交换。
2、如权利要求 1所述的方法, 其中, 所述第一基站控制器向核心网发送 携带第一用户的本地交换匹配信息的步骤包括: 所述第一基站控制器读取自身存储的第一用户的本地交换匹配信息; 以 及 将所述第一用户的本地交换匹配信息携带在切换需求消息中发送给所述 核心网。
3、如权利要求 2所述的方法, 其中, 所述第二基站控制器从所述核心网 获取第一用户的本地交换匹配信息的步骤包括: 所述第二基站控制器接收所述核心网发送的切换请求消息; 以及 从所述切换请求消息解析出所述第一用户的本地交换匹配信息,并緩存。
4、 如权利要求 1所述的方法, 其中, 在会话切换成功后, 所述方法还包 括:
所述第二基站控制器记录所述第一用户的本地交换匹配信息。
5、 如权利要求 1至 4中任意一项所述的方法, 其还包括: 所述第二基站控制器在会话切换失败后, 根据所述核心网的清除命令清 除为切换准备的信道相关资源和所述第一用户的本地交换匹配信息。
6、如权利要求 1至 4中任意一项所述的方法, 其中, 所述本地交换匹配 信息包括: 本地交换指示信息、 信道类型、 信道模式、 编码版本和第二用户 的号码。
7、 一种基站控制器, 其包括:
获取模块, 其设置为 获取用户的本地交换匹配信息; 生成模块, 其设置为 将用户的本地交换匹配信息填入到切换需求消息 中; 以及 发送模块, 其设置为 发送所述切换需求消息。
8、 一种基站控制器, 其包括:
存储模块, 其设置为 存储第二用户的本地交换匹配信息; 接收模块, 其设置为 接收核心网发送的携带第一用户的本地交换匹配 信息的切换请求消息; 解析模块, 其设置为 从切换请求消息解析出所述第一用户的本地交换 匹配信息; 匹配模块, 其设置为: 当所述第一用户向所述第二用户进行会话切换成 功后, 将所述第一用户的本地交换匹配信息与所述第二用户的本地交换匹配 信息进行匹配; 以及 本地交换模块, 其设置为: 当所述匹配模块的匹配结果为成功时, 则进 行本地交换。
9、 如权利要求 8所述的基站控制器, 其还包括: 记录模块, 其设置为: 当会话切换成功后, 记录所述第一用户的本地交 换匹配信息。
10、 如权利要求 9所述的基站控制器, 其还包括: 清除模块, 其设置为: 当会话切换失败后, 根据所述核心网的清除命令 清除为切换准备的信道相关资源和所述第一用户的本地交换匹配信息。
11、 一种控制本地交换的系统, 其包括: 第一基站控制器, 其设置为: 当第一基站控制器下的第一用户向第二基 站控制器下的第二用户进行会话切换时, 向核心网发送携带第一用户的本地 交换匹配信息; 以及 所述第二基站控制器, 其设置为: 从所述核心网获取第一用户的本地交 换匹配信息; 在会话切换成功后, 将所述第一用户的本地交换匹配信息与所 述第二用户的本地交换匹配信息进行匹配 ,如果匹配成功,则进行本地交换。
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