WO2011063665A1 - 一种提高通话性能的方法和基站控制器 - Google Patents

一种提高通话性能的方法和基站控制器 Download PDF

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Publication number
WO2011063665A1
WO2011063665A1 PCT/CN2010/076196 CN2010076196W WO2011063665A1 WO 2011063665 A1 WO2011063665 A1 WO 2011063665A1 CN 2010076196 W CN2010076196 W CN 2010076196W WO 2011063665 A1 WO2011063665 A1 WO 2011063665A1
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Prior art keywords
base station
station controller
module
terminal
message
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PCT/CN2010/076196
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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 WO2011063665A1 publication Critical patent/WO2011063665A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0016—Hand-off preparation specially adapted for end-to-end data sessions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/12—Access point controller devices

Definitions

  • the present invention relates to the field of communications technologies, and in particular to a method and base station controller for improving call performance. Background technique
  • the present invention proposes a method and a base station controller for improving the call performance.
  • a method for improving call performance includes: transmitting, by a terminal, a transparent transmission message to a core network by using a base station controller, where the base station controller parses the transparent transmission message; if the base station controller determines the received The transparent message is a disconnect request, and the base station controller does not initiate a handover to the terminal.
  • the method further includes: recording the de-linking request.
  • the base station controller checks whether the link disconnection request is recorded when the handover decision is made, and if yes, the base station controller Not transmitting a handover command to the terminal;
  • the method also includes: if not, the base station controller transmitting a handover command to the terminal.
  • the method when the transparent transmission message sent by the terminal is a de-linking request, the method further includes: after receiving the de-linking request, the core network responds to the release message to the terminal.
  • the method further includes: the terminal responding to the release complete message to the core network.
  • the method further includes: the base station controller clearing the record of the de-link request.
  • the present invention also provides a base station controller, including a receiving module, a parsing module, and a switching module.
  • the receiving module is configured to: receive a transparent transmission message sent by the terminal;
  • the parsing module is configured to: parse the transparent transmission message received by the receiving module; the switching module is configured to: perform a handover decision and perform a handover decision, and when the transparent transmission message is a disconnect request, The terminal does not initiate a handover.
  • the base station controller further includes a recording module
  • the recording module is configured to: when the transparent transmission message parsed by the parsing module is a de-linking request, record the de-linking request.
  • the switching module includes a viewing module and a sending module; the viewing module is configured to: check whether the recording module has a record of the de-linking request, and if yes, not notify the sending module; If not, notify the sending module;
  • the sending module is configured to: send a switching command.
  • the base station controller further includes a clearing module, and the clearing module is configured to: after the terminal completes the release message, clear the record of the recording module.
  • the invention can solve terminal abnormalities such as: mobile phone crosstalk, hang up, signal sag, etc., and causes wasteful allocation of BSC resources, thereby making network decision making more flexible and reliable, effectively saving resources, and effectively improving performance.
  • Report data, improved user perception and improved operations Business trust is a great help to improve customer satisfaction and call rate and provide application performance.
  • Figure 2 is a flow chart of the method of the present invention
  • FIG. 3 is a schematic diagram of a base station controller proposed by the present invention. Preferred embodiment of the invention
  • the Call Control (CC) protocol layer is mainly responsible for call-related processing, which is handled by the mobile phone and the core network.
  • the base station controller only transmits the messages transmitted by the mobile phone and the core network, and does not know the content.
  • the Radio Resource (RR) protocol layer is mainly responsible for the allocation of radio resources in calls and other behaviors. According to the protocol, the transmission of the RRC layer is performed between the MS and the BSC and the BTS, and the CC protocol layer in the MSC and the MS does not participate.
  • the mobile phone hangs up to the CC layer message, which is a matter between the MSC and the MS.
  • the BSC does not know, but the BSC may decide to initiate the handover at this time, so that the processing of the release and switching of the call channel is interleaved. Together.
  • the mobile phone initiates the on-hook process, and the CC protocol layer is then released.
  • the BSC sends a handover message to the mobile phone. Therefore, after the mobile phone replies with the CC layer release confirmation message, it immediately switches to the new channel.
  • the MSC sends a clear command to clear all relevant radio resources occupied by the mobile phone and the base station due to the release of the CC protocol layer.
  • the original dedicated and upcoming channels of the mobile phone are faced with the fate of being released. Because the handover, the mobile phone has left the original channel, so for the original channel, the BSC only clears the channel occupied by the base station, and for the new channel, considering that the mobile phone may have accessed the new channel, the BSC is releasing new In the case of a channel, the channel release command is sent to the mobile phone first, and the mobile phone channel is prepared to be notified and removed, and then the channel occupied by the base station is removed.
  • the two processes of switching and releasing are not known to each other, there is a time difference.
  • the BSC sends a Channel Release to the base station through the interface between the base station and the base station controller (Abis port)
  • the mobile phone is still in the process of attempting to access the new channel, because there is no access, so between the mobile phone and the base station.
  • the wireless link is not established. Therefore, the base station cannot send the Channel Release to the mobile phone, and the mobile phone also occupies the channel because it does not receive the message of releasing the channel.
  • the BSC sends the Channel Release, the timer is started, waiting for the removal confirmation reported by the mobile phone, but the cancellation confirmation sent by the mobile phone is not received until the timer expires, and the channel occupied by the base station is automatically released and the channel power is turned off.
  • the mobile phone accesses the switching channel, so the mobile phone does not have "dropped", but the channel has been released since the access. Therefore, the user sees a situation on the mobile phone: The mobile phone is still in a call, but the channel reception level channel displayed by the channel disappears. In addition to the consequences described above, this situation may also lead to crosstalk problems. Because when the traffic is relatively large, the BSC may reassign the channel to other mobile phones, and the old mobile phone has not left the channel at this time, so the old and new mobile phones may be crosstalked. At the same time, when the mobile phone decides to release, switching again, obviously also causes waste of BSC resource allocation.
  • the present invention proposes a method.
  • the core idea is to analyze whether the transparent transmission message sent by the terminal is a de-linking request by the base station controller, and record the de-linking request, and then the base station controller determines whether the local presence exists. Demolition request to solve the problem of abnormal phone and waste of BSC resource allocation.
  • the GSM system is taken as an example, and the implementation of the technical solution is further described in detail with reference to the accompanying drawings:
  • the method is as follows,
  • the base station controller And transmitting, by the base station controller, the transparent message to the core network, where the base station controller parses the transparent transmission message; and if the base station controller determines that the received transparent transmission message is a delinking request, The base station controller does not initiate a handover to the terminal.
  • the base station controller After the base station controller parses the transparent transmission message as a disconnect request, the base station controller records the disconnect request. In the foregoing method description, the base station controller checks whether a link disconnection request is recorded when performing a handover decision, and if yes, the base station controller does not send a handover command to the terminal; if not, the base station controller Sending a handover command to the terminal.
  • the core network when the transparent transmission message sent by the terminal is a disconnection request, after receiving the delinking request, the core network responds to the release message to the terminal.
  • the terminal responds to the release completion message to the core network.
  • the base station controller clears the record of the de-link request.
  • Step 201 The mobile phone prepares to hang up, sends a request message to the MSC, and transparently transmits the BSC and the BTS on the way.
  • Step 202 The BSC parses the transmitted request message, finds that it is a Disconnect request, and then records the message. Specifically, the BSC parses the transmitted request message, and finds that the Disconnect occurrence flag is true after Disconnect, and then records it.
  • Step 203 The BSC initiates the handover according to the analysis of the wireless environment. However, in the handover decision, the local (memory) existence record is found, that is, the Disconnect occurrence flag is true, and then the application for switching the resource is stopped, and the handover command is no longer sent to the mobile phone accordingly.
  • step 202 and step 203 when the request message is a disconnect request, the MSC responds to the release message to the mobile phone, and the mobile phone responds to the release complete message to the MSC.
  • the MSC After receiving the release completion message, the MSC initiates a release procedure, informing the BSC to clear the channels of the mobile phone, the base station, and the base station controller occupied by the call. details as follows,
  • Step 301 The MSC sends a clear command to the BSC, and the BSC performs channel teardown, and returns a clear complete message to the MSC.
  • Step 302 The BSC sends a channel release message to the mobile phone through the base station. After receiving the message, the mobile phone sends a Disconnect command (Dis) message to the base station to release the wireless link between the base station and the base station. Reply to the Unnumbered acknowledgement response (UA) message.
  • Disconnect command Dis
  • UUA Unnumbered acknowledgement response
  • Step 303 The base station sends a link release message to the BSC, and the BSC initiates a channel resource release procedure to the base station, and sends a radio channel release indication message to the base station. After receiving the base station, the base station releases the channel reply radio channel release confirmation message.
  • the present invention also provides a base station controller, as shown in FIG. 3, including a receiving module 301, an analyzing module 302, and a switching module 303;
  • the receiving module 301 is configured to receive a transparent transmission message sent by the terminal.
  • the parsing module 302 is configured to parse the transparent message received by the receiving module 301.
  • the switching module 303 is configured to perform a handover decision and perform a handover decision.
  • the transparent transmission message is a disconnect request, the solution is The terminal does not initiate a handover.
  • the base station controller further includes: a recording module 304, wherein the recording module 304 is configured to record, when the transparent transmission message parsed by the parsing module 302 is a de-linking request Demolition request.
  • the switching module 303 specifically includes: a viewing module 3031, a sending module 3032;
  • the above viewing module 3031 is configured to check whether the recording module 304 has the record of the above-mentioned unlinking request, and if so, not to notify the sending module 3032; otherwise, the sending module 3032;
  • the sending module 3032 is configured to send a switching command.
  • the foregoing base station controller further includes a clearing module 305, and the clearing module 305 is configured to clear the record of the recording module after the terminal responds to the release completion message to the core network.
  • a visual example of the understanding is not to be construed as limiting the scope of the invention. Skill Technicians in the field should be able to associate with other mobile communication systems, such as handheld telephone systems.
  • the invention can solve terminal abnormalities such as: mobile phone crosstalk, hang up, signal sag, etc., and causes wasteful allocation of BSC resources, thereby making network decision making more flexible and reliable, effectively saving resources, and effectively improving performance.
  • Report data improves user perception and improves operator trust, which is helpful for improving customer satisfaction, call rate and application performance.

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

Description

一种提高通话性能的方法和基站控制器
技术领域
本发明涉及通讯领域技术， 具体涉及一种提高通话性能的方法和基站控 制器。 背景技术
在目前的移动通信系统中， 随着终端的广泛使用， 社会和经济迅速的增 长， 但是在增长的过程中终端却无法满足消费者的需求， 并且时常异常导致 终端不能正常使用。
比较常见异常的是： 在运营商性能测试或用户使用中， 常常见到手机尚 显示在通话中， 但是信号格却突然掉了几个， 用户直观感受是功率突降； 有 时甚至出现手机挂死现象： 手机始终处在通话状态， 但却无法再接听寻呼或 拨出电话； 手机串话； 还有当手机决定释放时， 再进行切换， 显然也造成了 基站控制器（Base Station Controller, BSC ) 资源分配的浪费等问题。 以上问 题不仅影响了通信性能指标， 而且导致用户感知度差、 用户投诉增多， 导致 运营商对设备商能力的质疑。 发明内容
本发明为了解决终端异常， BSC资源分配浪费的问题， 提出了一种提高 通话性能的方法和基站控制器。
一种提高通话性能的方法， 所述方法包括： 终端发送透传消息经基站控 制器透传给核心网， 所述基站控制器解析所述透传消息； 如果所述基站控制 器判断接收到的所述透传消息为拆链请求， 则所述基站控制器对所述终端不 发起切换。
在上述方法中，所述基站控制器解析所述透传消息为所述拆链请求之后， 该方法还包括： 记录所述拆链请求。
在上述方法中， 所述如果所述基站控制器判断接收到的所述透传消息为 拆链请求， 则所述基站控制器对所述终端不发起切换的步骤包括： 所述基站 控制器在进行切换决策时查看是否记录有所述拆链请求， 如果是， 则所述基 站控制器不发送切换命令给所述终端；
该方法还包括： 如果不是， 则所述基站控制器发送切换命令给所述终端。 在上述方法中， 当终端发送的透传消息为拆链请求时， 该方法还包括： 所述核心网收到所述拆链请求后， 响应释放消息给所述终端。
在上述方法中， 所述核心网响应释放消息给所述终端之后， 该方法还包 括： 所述终端响应释放完成消息给所述核心网。
在上述方法中， 所述终端响应释放完成消息给所述核心网之后， 该方法 还包括： 所述基站控制器清除所述拆链请求的记录。
本发明还提出了一种基站控制器， 包括接收模块、解析模块和切换模块； 所述接收模块设置为： 接收终端发送的透传消息；
所述解析模块设置为： 解析所述接收模块接收到的所述透传消息； 所述切换模块设置为： 进行切换决策和执行切换决策， 当所述透传消息 是否为拆链请求， 则对所述终端不发起切换。
在上述基站控制器还包括记录模块；
所述记录模块设置为： 在所述解析模块解析出的所述透传消息为拆链请 求时， 记录所述拆链请求。
在上述基站控制器中 , 所述切换模块包括查看模块和发送模块； 所述查看模块设置为：查看所述记录模块是否存在所述拆链请求的记录， 如果是， 则不通知发送模块； 如果不是， 则通知发送模块；
所述发送模块设置为： 发送切换命令。
上述基站控制器还包括清除模块， 所述清除模块设置为： 当终端响应完 成释放消息之后， 清除所述记录模块的记录。
通过本发明可以解决终端异常例如： 手机串话、 挂机、 信号突降等等， 还有造成 BSC资源分配浪费等问题， 从而使网络决策更加灵活而可靠， 有效 节约了资源， 有效地提高了性能报表数据， 提高了用户感知度、 提高了运营 商信任度， 对提高客户满意度和呼通率和提供应用性能均有较大帮助。 附图概述
图 1是现有技术的通话流程图；
图 2是本发明的方法流程图；
图 3是本发明提出的基站控制器的示意图。 本发明的较佳实施方式
在现实生活用户投诉的问题中， 很多是这种情形： 手机挂机却挂不掉， 看上去有通话， 却出现信号全无， 然后可能就是手机不能再做主被叫、 手机 出现串话等问题， 最后导致 BSC资源分配的浪费。 深入的分析表明， 如图 1 所示出现这种情况时， 往往是在手机挂机后 BSC却发起了切换。 目前的通信 系统中， 基本分为核心网 （Mobile service Switch Centre, MSC ) 、 BSC, 基 站（ Base Station, BTS ) 、 手机（ Mobile Station, MS )或类似网元。 以全球 移动通讯系统 ( Global System for Mobile Communications , GSM ) 系统为例， 在协议 3GPP TS 44.008中， 不同层协议由不同的网元进行处理。 比如呼叫控 制 （Call Control, CC )协议层主要负责和呼叫相关的处理， 由手机和核心网 处理， 基站控制器只是透传手机和核心网互发的消息， 并不知晓内容。 而无 线资源管理（Radio Resource, RR )协议层主要负责呼叫等行为中无线资源 的分配。根据协议， 无线资源管理协议层的传输在 MS和 BSC以及 BTS之间 进行， 而 MSC和 MS中的 CC协议层并不参与。
在上述问题中， 手机挂机属于 CC层消息， 是 MSC和 MS之间的事情， BSC并不知， 但是 BSC随时可能在此时决策发起切换， 这样通话信道的释放 和切换两个流程的处理就交织在一起。 这种情况下， 手机发起挂机流程， CC 协议层于是进行释放， 这时， BSC却给手机下发了切换消息， 因此， 手机再 回复了 CC层释放确认消息后， 马上向新信道切换。 与此同时， MSC因 CC 协议层释放完成， 下发了清除命令来清除手机和基站所占用所有相关的无线 资源， 因此， 手机原来专用的和即将占用的信道都面临被释放处理的命运。 因为切换， 手机已经离开了原来的信道， 所以对于原信道而言， BSC只清除 基站占用的信道即可， 而对于新信道， 考虑到手机可能已经接入到新信道上， 所以 BSC在释放新信道时， 先发送释放手机信道命令 ( Channel Release )给 手机， 准备先告知并拆除手机信道， 然后再拆除基站占用的信道。 可是， 因 为切换和释放两个过程互不知晓， 因此， 存在时间差。 当 BSC通过基站和基 站控制器之间的接口 （Abis口）下发 Channel Release到基站时， 手机还处在 向新信道尝试接入的过程中， 因为还没有接入， 所以手机和基站之间无线链 路没有建立起来， 于是， 基站无法将 Channel Release发送给手机， 手机也因 为没有收到释放信道的消息， 所以手机还一直占用着这个信道。 BSC发送 Channel Release后开启了定时器， 等待手机上报的拆除确认， 但是直到定时 器超时都没收到手机上报的拆除确认， 于是自动释放基站占用的信道并关闭 此信道功率。 而在关闭信道前的一段时间， 手机接入切换信道， 所以手机没 有"掉话"， 但是因为接入后信道已被释放。 因此， 用户在手机上就看到这样 的情形： 手机还在通话中， 但是信道显示的通话接收电平信道消失。 这种情 况除了造成前面所描述过的后果外， 还可能出现串话问题。 因为当话务量比 较大时， BSC可能将信道重新分配给别的手机， 而此时旧手机仍未离开此信 道， 所以可能造成新旧手机串话。 同时， 当手机决定释放时， 再进行切换， 显然也造成了 BSC资源分配的浪费。
基于上述发现的问题， 本发明提出了一种方法， 其核心思想是通过基站 控制器解析终端发送的透传消息是否为拆链请求， 并记录拆链请求， 之后由 基站控制器判断本地是否存在拆链请求来解决手机异常、 BSC资源分配浪费 的问题。下面以 GSM系统为例，结合附图对技术方案的实施作进一步的详细 描述：
本方法如下所述，
终端发送透传消息经基站控制器透传给核心网， 所述基站控制器解析所 述透传消息； 如果所述基站控制器判断接收到的所述透传消息为拆链请求， 则所述基站控制器对所述终端不发起切换。
上述方法描述中， 所述基站控制器解析所述透传消息为拆链请求之后， 记录所述拆链请求。 上述方法描述中， 所述基站控制器在进行切换决策时查看是否记录有拆 链请求， 如果是， 则所述基站控制器不发送切换命令给所述终端； 如果否， 则所述基站控制器发送切换命令给所述终端。
上述方法描述中， 当所述终端发送的透传消息为拆链请求时， 所述核心 网收到所述拆链请求后， 响应释放消息给所述终端。
上述方法描述中， 所述响应释放消息给所述终端之后， 所述终端响应释 放完成消息给所述核心网。
上述方法描述中， 所述终端响应释放完成消息给所述核心网之后， 所述 基站控制器清除所述拆链请求的记录。
本方法具体实施例流程如图 2所示，
步骤 201、 手机准备挂机， 发送请求消息给 MSC, 途中经过 BSC和 BTS 的透传。
步骤 202、 BSC对传送的请求消息进行解析， 发现是拆链（Disconnect ) 请求， 然后对其进行记录。 具体为 BSC对传送的请求消息进行解析， 发现 Disconnect后设置 Disconnect发生标识为真， 然后对其进行记录。
步骤 203、 BSC根据对无线环境的分析， 发起切换。 但是在切换决策中， 发现本地（内存）存在记录即 Disconnect发生标识为真， 然后停止申请切换 资源， 相应地不再发送切换命令给手机。
在上述步骤 202、 步骤 203 的进行中， 当所述请求消息为拆链请求时， MSC响应释放消息给手机， 手机响应释放完成消息给 MSC。
当 MSC收到手机反馈的释放完成消息后，后续过称为现有技术，这里只 作简单介绍：
MSC在收到释放完成消息后发起了释放流程， 告知 BSC对本次呼叫中 占用的手机、 基站和基站控制器的信道进行清除。 具体如下，
步骤 301、 MSC发送清除命令给 BSC, BSC进行信道拆除， 并回复清除 完成消息给 MSC。 步骤 302、 BSC下发信道释放消息经基站透传给手机， 手机收到该消息 后， 发送拆除多帧链（ Disconnect command, Disc )消息给基站释放它和基站 之间的无线链路 ,之后基站回复无编号帧确认 ( Unnumbered acknowledgement response , UA ) 消息。
步骤 303、 基站发送链路释放消息给 BSC, BSC对基站发起信道资源释 放流程， 给基站发送无线信道释放指示消息。 基站收到后释放信道回复无线 信道释放确认消息。
在上述方法描述中，手机响应释放完成消息给 MSC之后，还需要对本地 即基站控制器的内存进行初始化（清除拆链请求的记录） 。
本发明还提出了一种基站控制器， 如图 3所示， 包括接收模块 301、 解 析模块 302、 切换模块 303;
上述接收模块 301， 用于接收终端发送的透传消息；
上述解析模块 302, 用于解析上述接收模块 301接收到的上述透传消息； 上述切换模块 303 , 用于进行切换决策和执行切换决策， 当所述透传消 息为拆链请求时， 则对所述终端不发起切换。
上述基站控制器的描述中， 所述基站控制器还包括： 记录模块 304; 上述记录模块 304, 用于在所述解析模块 302解析出的所述透传消息为 拆链请求时， 记录所述拆链请求。
上述基站控制器的描述中，所述切换模块 303具体包括：查看模块 3031、 发送模块 3032;
上述查看模块 3031 , 用于查看所述记录模块 304是否存在上述拆链请求 的记录， 如果是， 则不通知发送模块 3032; 否则， 通知发送模块 3032;
上述发送模块 3032, 用于发送切换命令。
上述基站控制器还包括清除模块 305 , 所述清除模块 305是用于当终端 响应释放完成消息给核心网之后， 清除所述记录模块的记录。 于理解而举的一个形象化的实例， 不应被视为是对本发明范围的限制。 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 )或一些 3G移动通信系统等 ， 根据本发明的技术方案及其 较佳实施例的描述， 可以做出各种可能的等同改变或替换， 而所有这些改变 或替换都应属于本发明权利要求的保护范围。
工业实用性
通过本发明可以解决终端异常例如： 手机串话、 挂机、 信号突降等等， 还有造成 BSC资源分配浪费等问题， 从而使网络决策更加灵活而可靠， 有效 节约了资源， 有效地提高了性能报表数据， 提高了用户感知度、 提高了运营 商信任度， 对提高客户满意度和呼通率和提供应用性能均有较大帮助。

Claims

权 利 要 求 书
1、 一种提高通话性能的方法， 所述方法包括：
终端发送透传消息经基站控制器透传给核心网， 所述基站控制器解析所 述透传消息； 如果所述基站控制器判断接收到的所述透传消息为拆链请求， 则所述基站控制器对所述终端不发起切换。
2、 如权利要求 1所述的方法， 其中， 所述基站控制器解析所述透传消息 为所述拆链请求之后， 该方法还包括： 记录所述拆链请求。
3、如权利要求 2所述的方法， 所述如果所述基站控制器判断接收到的所 述透传消息为拆链请求， 则所述基站控制器对所述终端不发起切换的步骤包 括： 所述基站控制器在进行切换决策时查看是否记录有所述拆链请求， 如果 是， 则所述基站控制器不发送切换命令给所述终端；
该方法还包括： 如果不是， 则所述基站控制器发送切换命令给所述终端。
4、 如权利要求 2至 3中任一项所述的方法， 该方法还包括： 所述核心网 收到所述拆链请求后， 响应释放消息给所述终端。
5、 如权利要求 4所述的方法， 其中， 所述核心网响应释放消息给所述终 端之后， 该方法还包括： 所述终端响应释放完成消息给所述核心网。
6、 如权利要求 5所述的方法， 其中， 所述终端响应释放完成消息给所述 核心网之后， 该方法还包括： 所述基站控制器清除所述拆链请求的记录。
7、 一种基站控制器， 所述基站控制器包括接收模块、 解析模块和切换模 块；
所述接收模块设置为： 接收终端发送的透传消息；
所述解析模块设置为： 解析所述接收模块接收到的所述透传消息； 所述切换模块设置为： 进行切换决策和执行切换决策， 当所述透传消息 为拆链请求时， 则对所述终端不发起切换。
8、 如权利要求 7所述的基站控制器， 所述基站控制器还包括记录模块； 所述记录模块设置为： 在所述解析模块解析出的所述透传消息为拆链请 求时， 记录所述拆链请求。
9、 如权利要求 8所述的基站控制器， 其中， 所述切换模块包括查看模块 和发送模块；
所述查看模块设置为：查看所述记录模块是否存在所述拆链请求的记录， 如果是， 则不通知发送模块； 如果不是， 则通知发送模块；
所述发送模块设置为： 发送切换命令。
10、如权利要求 9所述的基站控制器， 所述基站控制器还包括清除模块， 所述清除模块设置为： 当终端响应释放完成消息给核心网之后， 清除所 述记录模块的记录。
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