WO2012000175A1 - 一种释放本地交换的方法及系统 - Google Patents

一种释放本地交换的方法及系统 Download PDF

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Publication number
WO2012000175A1
WO2012000175A1 PCT/CN2010/074731 CN2010074731W WO2012000175A1 WO 2012000175 A1 WO2012000175 A1 WO 2012000175A1 CN 2010074731 W CN2010074731 W CN 2010074731W WO 2012000175 A1 WO2012000175 A1 WO 2012000175A1
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Prior art keywords
bss
local exchange
release
core network
local
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PCT/CN2010/074731
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English (en)
French (fr)
Inventor
江宁
柯昌伟
李靖
王欣晖
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中兴通讯股份有限公司
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to PCT/CN2010/074731 priority Critical patent/WO2012000175A1/zh
Publication of WO2012000175A1 publication Critical patent/WO2012000175A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/08—Mobility data transfer
    • H04W8/082—Mobility data transfer for traffic bypassing of mobility servers, e.g. location registers, home PLMNs or home agents

Definitions

  • the present invention relates to the field of mobile communications, and in particular, to a method and system for releasing a local exchange during a call setup process. Background technique
  • the mobile switching center server MSC Server, Mobile Switching Center Server
  • BSC Base Station Controller
  • the mobile terminal MS, Mobile Station
  • BTS Base Transceiver Station
  • the BTS and the BSC are connected via an Abis interface.
  • the BTS and BSC can also be collectively referred to as a Base Station Subsystem (BSS).
  • BSS Base Station Subsystem
  • the user plane voice of the calling party is transmitted to the media gateway (MGW, Media Gateway) through the BSC, and then transmitted by the MGW to the BSC of the opposite end, even if both parties in the call are in the same BSC. under.
  • MGW Media Gateway
  • the MGW Media Gateway
  • the user's voice of the calling party is transmitted to the BSC through the Abis port of the BTS.
  • the BSS then transmits the voice of the user plane to the MGW, and the MGW transmits the voice of the user plane back to the original.
  • the BSC, the original BSC transmits the user plane voice to the original BTS, resulting in waste of Abis port and A port transmission resources.
  • the user's voice of the calling party is transmitted to the control BTS of the BTS cluster through the Abis port of the BTS, and the control BTS passes the Abis port through the Abis port.
  • the user plane voice is transmitted to the BSC, and the BSC transmits the user plane voice to the MGW, and the MGW transmits the user plane voice back to the original BSC, and the original BSC transmits the user plane voice to the control BTS, and the above control BTS then the user
  • the voice is transmitted to the original BTS causes the above-mentioned control of the waste of the Abis port transmission resource between the BTS and the BSC, and also wastes the A port transmission resource.
  • the BSS first transmits the user plane voice to the MGW, and the MGW transmits the user plane voice to the BSS, thereby causing the A port to transmit resources. Waste.
  • the local voice is exchanged, and the user voice is not transmitted to the MGW through the A port.
  • the BSS directly exchanges the voice data of the two parties, no longer.
  • the MSS is transmitted to the MGW, and the BSS transmits the mute frame to the MGW.
  • the MGW does not modify the MGW, and still sends the received mute frame back to the BSS, and the BSS will discard the mute frame received from the MGW. Therefore, the purpose of saving bandwidth resources of the Abis port and the A port is achieved.
  • voice data is not sent to the core network.
  • the BSS sends a message to the core network to inform the core network that the local exchange needs to be stopped.
  • the core network will inform the BSS to stop using the local switching function.
  • the BSS stops using the local switching function.
  • the stop of the local exchange function here is to release the local exchange, the following is explained by releasing the local exchange.
  • the problem with the above scheme of releasing the local exchange is that: after the BSS informs the core network that the local exchange needs to be released, there may be a possibility that the BSS does not need to release the local exchange immediately. Sex, but the core network will not know or consider this possibility, as long as the core network needs BSS to release the local exchange, or the core network will send the release local as long as it receives the release local exchange request message sent by the BSS.
  • a method for releasing a local exchange comprising: receiving, by a base station subsystem (BSS), a release local exchange message sent by a core network; and determining, by the BSS, whether to release a local exchange according to a release parameter in the release local exchange message.
  • BSS base station subsystem
  • the release parameter specifically includes: a reason why the core network informs the BSS to release the local exchange, and/or a state in which the core network informs the BSS whether the current core network allows local exchange.
  • the reason why the core network informs the BSS to release the local exchange is that the BSS itself releases the local exchange request; the core network informs the BSS whether the current core network allows the local exchange status to be based on the current core network itself.
  • the method further includes: the BSS further determining whether to release the local exchange according to the state of the BSS itself.
  • the method further includes: the BSS immediately releases the local exchange.
  • a system for releasing a local exchange the system comprising a release unit, configured to: when the BSS receives a release local exchange message sent by a core network, the BSS decides whether to release according to a release parameter in the release local exchange message Local exchange.
  • the release parameter specifically includes: a reason why the core network informs the BSS to release the local exchange, and/or a state in which the core network informs the BSS whether the current core network allows local exchange.
  • the reason why the core network informs the BSS to release the local exchange is that the BSS itself releases the local exchange request; the core network informs the BSS whether the current core network allows the local exchange status to be based on the current core network itself.
  • the releasing unit is further configured to: when the BSS receives the reason that the core network informs the BSS to release the local exchange, the BSS further determines whether to release the local exchange according to the state of the BSS itself.
  • the releasing unit is further configured to: when the BSS receives the status that the core network informs the BSS whether the current core network allows local switching, the BSS immediately releases the local switching.
  • the BSS of the present invention receives the release local exchange message sent by the core network; the BSS decides whether to release the local exchange according to the release parameter in the release local exchange message.
  • the BSS can decide whether to release the local exchange, so that the decision to release the local exchange is finally converted from the core network to the BSS, which is controlled by the core network, as long as the core network issues a release.
  • the BSS unconditionally releases the local exchange.
  • the decision right is controlled by the BSS, which is an enhancement and major improvement to the existing release local exchange, so that the call quality and user experience of both users of the call are greatly improved.
  • FIG. 1 is a schematic diagram of user plane voice transmission between MS, BSS and MGW in the prior art
  • FIG. 2 is a schematic diagram of user plane voice transmission between MS, BSS and MGW after local exchange is implemented in the prior art
  • 3 is a schematic diagram of signaling of an MSC informing the BSS to release a local exchange according to the present invention
  • FIG. 4 is a schematic diagram of another signaling of the MSC informing the BSS to release the local exchange according to the present invention
  • FIG. 5 is a schematic diagram of the core network transmitting the local exchange message to the BSS in the extreme case due to the core network
  • FIG. 6 is a schematic diagram of a signaling for releasing a local exchange in an extreme case according to the present invention.
  • FIG. 7 is a schematic diagram of another signaling for releasing a local exchange in an extreme case according to the present invention. detailed description
  • the basic idea of the present invention is: The BSS receives the release local exchange message sent by the core network; the BSS decides whether to release the local exchange according to the release parameter in the release local exchange message.
  • a method of releasing a local exchange mainly includes the following contents:
  • the BSS receives the release local exchange message sent by the core network; the BSS decides whether to release the local exchange according to the release parameter in the release local exchange message.
  • the present invention is different from the prior art in that the decision to finally decide whether to release the local exchange is converted from the core network to the BSS, thereby releasing the existing local.
  • the exchange process has been improved and enhanced.
  • the releasing the parameters may specifically include: the core network notifying the BSS of the reason for releasing the local exchange, and/or the core network notifying the BSS whether the current core network allows the state of the local exchange.
  • the preferred solution is an alternative, that is: the release parameter either informs the core network of the reason for the BSS to release the local exchange; the release parameter either informs the core network whether the current core network of the BSS allows the state of the local exchange.
  • the present invention is different from the prior art in that the releasing the local exchange message carries the release parameter, and the release parameter may specifically include: the core network notifying the BSS to release the reason of the local exchange, and/or the core network notifying the BSS whether the current core network is allowed.
  • the state of the local exchange Therefore, according to the present invention, according to the specific release parameter described above, the BSS can distinguish the strip from releasing the local exchange message. Whether the local exchange needs to be released due to the BSS request, or whether the local exchange is released due to the needs of the core network.
  • the final decision of the BSS is assisted based on the specific release parameters, which can greatly improve the accuracy of the decision, and can be adaptively adjusted according to the needs of the BSS to meet the needs of the user's call quality and user experience.
  • the invention is illustrated by way of example below.
  • a method of releasing a local exchange comprising the steps of:
  • Step 101 When the core network sends and releases the local exchange message to the BSS, the core network informs the BSS of the reason for releasing the local exchange, or the core network informs the BSS whether the current core network allows the state of the local exchange.
  • the release of the local exchange message may also be referred to as a command for releasing the local exchange, and the name used is not limited thereto, and any name may be used as long as the solution capable of implementing the present invention is within the scope of the present invention.
  • Step 102 After receiving the release of the local exchange message, the BSS is informed based on the reason that the core network informs the BSS to release the local exchange, or the core network informs the BSS whether the current core network allows the local exchange to release the local exchange. The reason for the decision is whether to release the local exchange.
  • the MSC in the core network informs the BSS of the reason for releasing the local exchange, or informs the BSS whether the current core network allows the state of the local exchange.
  • the MSC can implement the notification in the following manner.
  • Manner 1 As shown in FIG. 3, an indicator for releasing the reason of the local exchange is added to the release local exchange message sent by the MSC to the BSS.
  • the format of the indicator can be as shown in Table 1.
  • Table 1 is an indicator format table for transmitting user data to the core network.
  • the indicator occupies 2 bits, and the indicator may indicate the reason for releasing the local exchange. For example, 00 indicates that the local exchange is released due to receiving the BSS; 01 indicates that the core network needs to release the local exchange.
  • an indicator of whether the current core network allows the state of the local exchange is added to the release local exchange message sent by the MSC to the BSS.
  • the format of the indicator can be as shown in Table 2.
  • Table 2 is an indicator format table for another user data transmission to the core network. The indicator occupies 1 bit, and the indicator may indicate whether the current core network allows the state of local switching, such as 0 indicating that the core network allows local switching; 1 indicates that the core network does not allow local switching.
  • the BSS receives the release of the local exchange message.
  • the following processing manners may be adopted, that is, according to the specific release parameters currently received, the core network informs the BSS to release the reason of the local exchange, and/or the core network informs the BSS whether the current core network allows the local exchange status to determine whether the local exchange needs to be performed. Release operation.
  • the BSS may decide whether to release the local exchange according to the current state of the BSS itself; when the BSS receives the core network, When the network informs the BSS whether the current core network allows the state of the local exchange and needs to release the local exchange, the BSS will immediately release the local exchange function.
  • the core network sends a release local exchange message to the BSS that needs to release the local exchange due to the core network.
  • the specific processing scheme of the present invention in the extreme case is as follows: As shown in FIG. 5, after the BSS sends a release local exchange request message to the MSC, the MSC has actively sent the message to the BSS before receiving the release local exchange request message. The release of the local exchange release local exchange message due to the core network causes the BSS to receive a release local exchange request message sent by the MSC to the BSS after sending the release local exchange request message.
  • the MSC releases the release of the local exchange due to the core network.
  • the MSC After the local exchange request message is sent to the BSS, and before receiving the acknowledgment sent by the BSS or refusing to release the locally exchanged message, if the release of the local exchange request message sent by the BSS is received, the MSC still sends the BSS reason according to the existing procedure.
  • the release of the local exchange releases the local exchange message to the BSS. Therefore, the BSS will receive two release local exchange messages. Specifically, it first receives a release local exchange message that releases the local exchange due to the core network, and then receives a release of the local exchange due to the BSS cause. Release the local exchange message.
  • the BSS will begin to perform the release of the local exchange upon receiving the first release of the local exchange message, thereby releasing the local exchange message when the local exchange is released due to the BSS cause, since the BSS has executed or is executing The operation of the local exchange is released, so the BSS will not repeat the operation of releasing the local exchange.
  • the release of the local exchange request message due to the core network is: the reason for releasing the local exchange is that the core network needs to be released, or the core network allows the local exchange status to be that the core network cannot establish the local exchange release local.
  • Exchange messages are: the reason for releasing the local exchange is that the core network needs to be released, or the core network allows the local exchange status to be that the core network cannot establish the local exchange release local.
  • the release of the local exchange release message due to the BSS cause is: With the release of the local exchange, the reason for the BSS reason needs to be released, or the core network allows the local exchange status to be the core network to establish a local exchange release local exchange message.
  • the MSC after transmitting the release local exchange request message of the local exchange to the BSS due to the core network, the MSC receives the BSS before receiving the acknowledgement sent by the BSS or rejecting the release of the locally exchanged message.
  • the MSC will no longer send the release local exchange message to the BSS due to the BSS cause to release the local exchange. Therefore, the BSS will only receive a release local exchange message for releasing the local exchange. Specifically, only one release local exchange message is released due to the core network.
  • the BSS will begin the operation of releasing the local exchange after receiving the release of the local exchange message due to the core network and releasing the local exchange.
  • the release of the local exchange request message due to the core network is: the reason for releasing the local exchange is that the core network needs to be released, or the core network allows the local exchange status to be that the core network cannot establish the local exchange release local. Exchange messages.
  • the release of the local exchange release message due to the BSS cause is: With the release of the local exchange, the reason for the BSS reason needs to be released, or the core network allows the local exchange status to be the core network to establish a local exchange release local exchange message.
  • a system for releasing a local exchange comprising a release unit, wherein the release unit is configured to determine whether to release the local exchange according to a release parameter in the release local exchange message, if the BSS receives the release of the local exchange message sent by the core network. .
  • the release parameter specifically includes: the core network tells the BSS to release the reason of the local exchange, and/or the core network informs the BSS whether the current core network allows the state of the local exchange.
  • the reason why the core network informs the BSS to release the local exchange is that the BSS itself releases the local exchange request; the core network informs the BSS whether the current core network allows the state of the local exchange to be based on the current core network itself.
  • the releasing unit is further configured to: when the BSS receives the core network to inform the BSS of the reason for releasing the local exchange, the BSS further determines whether to release the local exchange according to the state of the BSS itself.
  • the releasing unit is further configured to immediately release the local exchange when the BSS receives the state in which the core network informs the BSS whether the current core network allows local switching.

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Description

一种释放本地交换的方法及系统 技术领域
本发明涉及移动通信领域， 尤其涉及一种在呼叫建立过程中释放本地 交换的方法及系统。 背景技术
在现有的全球移动通讯系统 （ GSM , Global System for Mobile Communications )中， 移动交换中心服务器 ( MSC Server, Mobile Switching Center Server )和基站控制器（BSC, Base Station Controller )之间采用 A 接口进行通信， 而移动终端 （MS, Mobile Station )与基站收发台 （BTS, Base Transceiver Station )通过空中接口 Um接口进行通信。 此外， BTS与 BSC之间通过 Abis接口连接。 BTS与 BSC也可被统称为基站子系统（ BSS, Base Station Subsystem )。
目前在 GSM系统的主叫与被叫流程中，都会将呼叫一方的用户面语音 通过 BSC传递给媒体网关（ MGW, Media Gateway )， 再由 MGW传递给对 端的 BSC, 即使通话双方处于同一个 BSC下。 但是， 在实际的 GSM网络 中， 存在着大量本地通话（Local Call ) 的情况， 即通话双方属于同一 BTS 下的情况、 或者通话双方属于同一 BTS簇下的不同 BTS的情况、 或者通话 双方属于同一 BSS下的情况。 对于这些不同情况下的本地通话， 如果仍沿 用现有的呼叫处理流程， 则会出现以下问题：
对于通话双方属于同一 BTS下的呼叫而言， 就会出现呼叫一方的用户 面语音通过 BTS 的 Abis 口传送给 BSC, BSS再将该用户面语音传送给 MGW, MGW再把用户面语音传送回原 BSC,原 BSC再将该用户面语音传 送给原 BTS的情况， 从而导致 Abis口和 A口传输资源的浪费。 对于通话双方属于同一 BTS簇下的不同 BTS间的呼叫而言，就会出现 呼叫一方的用户面语音通过 BTS的 Abis口传送给该 BTS簇的控制 BTS, 该控制 BTS再通过其 Abis口将该用户面语音传送给 BSC, BSC再将该用 户面语音传送给 MGW, MGW再将用户面语音传送回原 BSC, 原 BSC再 将该用户面语音传送给上述控制 BTS, 上述控制 BTS再将该用户面语音传 送给原 BTS的情况， 从而导致上述控制 BTS与 BSC间的 Abis口传输资源 的浪费， 同时也浪费了 A口传输资源。
如图 1所示，对于通话双方属于同一 BSS下的呼叫而言，就会出现 BSS 先将用户面语音传送给 MGW, MGW再把用户面语音传送给该 BSS的情况， 从而导致 A口传输资源的浪费。
目前已经在研究通过本地交换的方式， 将用户语音不经过 A口传递给 MGW, 如图 2所示， 对于通话双方属于同一个 BSS下的呼叫， BSS直接将 双方的语音数据进行交换， 不再传送给 MGW, BSS传递静音帧给 MGW, MGW不做修改，仍旧把收到的静音帧发回给 BSS, 而 BSS将丟弃从 MGW 收到的静音帧。从而达到节省 Abis口和 A口带宽资源的目的。 图 2中， 并 不将语音数据发送给核心网。
在某些场景下， 例如对于使用了本地交换的通话， 如果 BSS需要停止 使用本地交换功能， 按照现有的实现方式， 则 BSS会给核心网发送一条消 息用于告知核心网需要停止使用本地交换功能。 核心网在收到来自于 BSS 的该消息后， 会告知 BSS停止使用本地交换功能， BSS在收到来自于核心 网的告知 BSS停止使用本地交换功能的消息后， 停止使用本地交换功能。 这里的停止使用本地交换功能即为释放本地交换， 以下都用释放本地交换 阐述。
然而， 采用上述释放本地交换的方案存在的问题在于： 在 BSS告知核 心网需要释放本地交换后， 可能存在 BSS不需要立即释放本地交换的可能 性，但是核心网不会知道也不会考虑这种可能性，只要是在核心网需要 BSS 释放本地交换时、 或者核心网只要收到 BSS发送的释放本地交换请求消息 时，都会一概发送释放本地交换消息给 BSS,告知 BSS立即释放本地交换， 从而导致原本未请求释放本地交换的 BSS由于核心网的需要而被迫释放本 地交换、或者原本请求了释放本地交换但暂时不想释放的 BSS由于 BSS的 在先请求而被迫释放本地交换。 目前针对这个问题， 迫切需要一种释放本 地交换的改进方案， 使 BSS可以在收到释放本地交换请求消息后能判决是 否释放本地交换， 再最终释放本地交换， 而不是 BSS—收到释放本地交换 请求消息后就立即释放本地交换， 然而目前并未存在这样的改进方案。 发明内容
有鉴于此， 本发明的主要目的在于提供一种释放本地交换的方法及系 统， 使 BSS可以判决是否释放本地交换。
为达到上述目的， 本发明的技术方案是这样实现的：
一种释放本地交换的方法， 该方法包括： 基站子系统（BSS )收到核心 网下发的释放本地交换消息； 所述 BSS根据所述释放本地交换消息中的释 放参数判决是否释放本地交换。
其中， 所述释放参数具体包括： 核心网告知 BSS释放本地交换的原因、 和 /或核心网告知 BSS当前核心网是否允许本地交换的状态。
其中， 所述核心网告知 BSS释放本地交换的原因是基于 BSS自身释放 本地交换的请求； 所述核心网告知 BSS当前核心网是否允许本地交换的状 态是基于当前核心网的自身需要。
其中， 当所述 BSS收到所述核心网告知 BSS释放本地交换的原因时， 该方法还包括： BSS进一步结合 BSS自身的状态判决是否释放本地交换。
其中， 当所述 BSS收到所述核心网告知 BSS当前核心网是否允许本地 交换的状态时， 该方法还包括： BSS立即释放本地交换。 一种释放本地交换的系统， 该系统包括释放单元， 用于在 BSS收到核 心网下发的释放本地交换消息的情况下， 所述 BSS根据所述释放本地交换 消息中的释放参数判决是否释放本地交换。
其中， 所述释放参数具体包括： 核心网告知 BSS释放本地交换的原因、 和 /或核心网告知 BSS当前核心网是否允许本地交换的状态。
其中， 所述核心网告知 BSS释放本地交换的原因是基于 BSS自身释放 本地交换的请求； 所述核心网告知 BSS当前核心网是否允许本地交换的状 态是基于当前核心网的自身需要。
其中，所述释放单元，进一步用于在所述 BSS收到所述核心网告知 BSS 释放本地交换的原因时， BSS进一步结合 BSS 自身的状态判决是否释放本 地交换。
其中，所述释放单元，进一步用于在所述 BSS收到所述核心网告知 BSS 当前核心网是否允许本地交换的状态时， BSS立即释放本地交换。
本发明的 BSS收到核心网下发的释放本地交换消息； BSS根据释放本 地交换消息中的释放参数判决是否释放本地交换。
采用本发明， 使 BSS可以判决是否释放本地交换， 从而将最终判决是 否释放本地交换的决定权由核心网转换到 BSS, 区别于现有技术决定权由 核心网控制， 只要核心网下发了释放本地交换消息， BSS都无条件的一概 释放本地交换， 采用本发明， 决定权由 BSS控制， 是对现有释放本地交换 的增强和重大改进， 使通话双方用户的通话质量和用户体验都得到大大提 高。 附图说明
图 1为现有技术中 MS、 BSS和 MGW间用户面语音传递的示意图； 图 2为现有方案在实现了本地交换以后 MS、 BSS和 MGW间用户面语 音传递的示意图； 图 3为本发明 MSC通知 BSS释放本地交换的一信令示意图；
图 4为本发明 MSC通知 BSS释放本地交换的另一信令示意图； 图 5为本发明在极端情况下核心网向 BSS发送由于核心网原因需要释 放本地交换消息的示意图；
图 6为本发明在极端情况下释放本地交换的一信令示意图；
图 7为本发明在极端情况下释放本地交换的另一信令示意图。 具体实施方式
本发明的基本思想是： 的 BSS收到核心网下发的释放本地交换消息； BSS根据释放本地交换消息中的释放参数判决是否释放本地交换。
下面结合附图对技术方案的实施作进一步的详细描述。
一种释放本地交换的方法， 该方法主要包括以下内容：
BSS收到核心网下发的释放本地交换消息； BSS根据释放本地交换消 息中的释放参数判决是否释放本地交换。
可见， 由于 BSS可以根据所述释放参数判决是否释放本地交换， 因此， 本发明区别于现有技术， 将最终判决是否释放本地交换的决定权由核心网 转换到 BSS, 从而对现有的释放本地交换流程进行了改进和增强。
进一步地， 释放参数具体可以包括： 核心网告知 BSS释放本地交换的 原因、 和 /或核心网告知 BSS当前核心网是否允许本地交换的状态。 优选的 方案是择一选择， 即为： 释放参数要么为核心网告知 BSS释放本地交换的 原因； 释放参数要么为核心网告知 BSS当前核心网是否允许本地交换的状 态。
可见， 本发明区别于现有技术， 在释放本地交换消息中携带了释放参 数， 且释放参数具体可以包括： 核心网告知 BSS释放本地交换的原因、 和 / 或核心网告知 BSS当前核心网是否允许本地交换的状态。 从而， 采用本发 明， 根据上述具体的释放参数， BSS 可以区分出该条释放本地交换消息， 是由于 BSS请求而需要释放本地交换的原因， 还是由于核心网的需要而释 放本地交换的原因。 基于具体的释放参数辅助 BSS的最终判决， 能大大提 高判决的精准性， 而且可以根据 BSS需要进行自适应调整， 以满足用户通 话质量和用户体验的需要。
以下对本发明进行举例阐述。
一种释放本地交换的方法， 该方法包括以下步驟：
步驟 101、 核心网在发送释放本地交换消息给 BSS时， 同时核心网告 知 BSS释放本地交换的原因、或者核心网告知 BSS当前核心网是否允许本 地交换的状态。 其中， 所述释放本地交换消息也可以称为用于释放本地交 换的命令， 采用的名称不限于此， 具体采用何种名称只要是能实现本发明 的方案都在本发明的保护范围内。
步驟 102、 BSS在收到释放本地交换消息后， 根据核心网告知 BSS释 放本地交换的原因、 或者核心网告知 BSS当前核心网是否允许本地交换的 状态获知释放本次本地交换的原因， 从而基于获知的原因判决是否释放本 地交换。
在上述步驟 101中，具体是核心网中的 MSC告知 BSS释放本地交换的 原因、 或者告知 BSS当前核心网是否允许本地交换的状态。 MSC可以通过 以下方式实现所述告知。
方式一：如图 3所示，在 MSC发送给 BSS的释放本地交换消息中加入 释放本地交换的原因的指示符。 该指示符的格式可如表 1所示， 表 1 为用 户数据传送给核心网的指示符格式表。 其中， 该指示符占用 2个比特， 该 指示符可表示释放本地交换的原因，如 00表示由于收到 BSS的释放本地交 换的请求； 01表示核心网需要释放本地交换。
8 7 6 5 4 3 2 1 长度 预留 2比特 1个字节 方式二：如图 4所示，在 MSC发送给 BSS的释放本地交换消息中加入 当前核心网是否允许本地交换的状态的指示符。 该指示符的格式可如表 2 所示， 表 2 为另一个用户数据传送给核心网的指示符格式表。 其中， 该指 示符占用 1个比特， 该指示符可表示当前核心网是否允许本地交换的状态， 如 0表示核心网允许本地交换； 1表示核心网不允许本地交换。
Figure imgf000009_0002
Figure imgf000009_0001
在上述步驟 102 中， BSS在收到释放本地交换消息后。 可以采用以下 处理方式， 即为： 根据当前收到的具体释放参数， 核心网告知 BSS释放本 地交换的原因、和 /或核心网告知 BSS当前核心网是否允许本地交换的状态 判决是否需要执行本地交换的释放操作。 当 BSS收到由于 BSS原因， 即核 心网告知 BSS释放本地交换的原因而需要释放本地交换时， BSS可以根据 当前 BSS自身的状态决定是否释放本地交换；当 BSS收到由于核心网原因， 即核心网告知 BSS当前核心网是否允许本地交换的状态而需要释放本地交 换时， BSS将立即释放本地交换功能。
另外， 在非常极端情况下， 即： 几乎在 BSS在发送释放本地交换请求 消息给核心网的同时， 核心网向 BSS发送由于核心网原因需要释放本地交 换的释放本地交换消息。 这种极端情况下本发明的具体处理方案如下所示： 如图 5所示， BSS在向 MSC发送释放本地交换请求消息后， MSC在 收到该释放本地交换请求消息之前， 已经主动向 BSS发送了由于核心网原 因导致释放本地交换的释放本地交换消息， 从而 BSS会在发送了释放本地 交换请求消息后，收到一条 MSC主动向 BSS发送的释放本地交换请求消息。
针对这种极端情况， 此处提供以下两种应用实例：
应用实例一：
如图 6所示， MSC在发送由于核心网原因而导致释放本地交换的释放 本地交换请求消息给 BSS后， 且在收到 BSS发送的确认、 或者拒绝释放本 地交换的消息前， 若收到 BSS发送的释放本地交换请求消息时， MSC仍旧 按照现有的流程发送由于 BSS原因而导致释放本地交换的释放本地交换消 息给 BSS。 从而， BSS将会收到两条释放本地交换消息， 具体的， 先收到 一条由于核心网原因而导致释放本地交换的释放本地交换消息， 然后再收 到一条由于 BSS原因而导致释放本地交换的释放本地交换消息。此时， BSS 将在收到第一条释放本地交换消息时已经开始执行释放本地交换， 从而在 收到由于 BSS原因而导致释放本地交换的释放本地交换消息时， 由于 BSS 已经执行了或正在执行释放本地交换的操作， 因此， BSS 将不再重复执行 释放本地交换的操作。
其中， 由于核心网原因而导致释放本地交换的释放本地交换请求消息 为： 带有释放本地交换的原因为核心网原因需要释放、 或核心网允许本地 交换状态为核心网不可建立本地交换的释放本地交换消息。
由于 BSS原因而导致释放本地交换的释放本地交换消息为： 带有释放 本地交换的原因为 BSS原因需要释放、 或核心网允许本地交换状态为核心 网可建立本地交换的释放本地交换消息。
应用实例二：
如图 7所示， MSC在发送由于核心网原因而导致释放本地交换的释放 本地交换请求消息给 BSS后， 且在收到 BSS发送的确认、 或者拒绝释放本 地交换的消息前， 若收到 BSS发送的释放本地交换请求消息时， MSC将不 再发送由于 BSS原因而导致释放本地交换的释放本地交换消息给 BSS。 从 而， BSS将只会收到一条用于释放本地交换的释放本地交换消息， 具体的， 只收到一条由于核心网原因而导致释放本地交换的释放本地交换消息。 BSS 将在收到该由于核心网原因而导致释放本地交换的释放本地交换消息后， 开始执行释放本地交换的操作。 其中， 由于核心网原因而导致释放本地交换的释放本地交换请求消息 为： 带有释放本地交换的原因为核心网原因需要释放、 或核心网允许本地 交换状态为核心网不可建立本地交换的释放本地交换消息。
由于 BSS原因而导致释放本地交换的释放本地交换消息为： 带有释放 本地交换的原因为 BSS原因需要释放、 或核心网允许本地交换状态为核心 网可建立本地交换的释放本地交换消息。
一种释放本地交换的系统，该系统包括释放单元，释放单元用于在 BSS 收到核心网下发的释放本地交换消息的情况下， BSS根据释放本地交换消 息中的释放参数判决是否释放本地交换。
这里， 释放参数具体包括： 核心网告知 BSS释放本地交换的原因、 和 / 或核心网告知 BSS当前核心网是否允许本地交换的状态。
这里， 核心网告知 BSS释放本地交换的原因是基于 BSS自身释放本地 交换的请求； 核心网告知 BSS当前核心网是否允许本地交换的状态是基于 当前核心网的自身需要。
这里， 释放单元进一步用于在 BSS收到核心网告知 BSS释放本地交换 的原因时， BSS进一步结合 BSS自身的状态判决是否释放本地交换。
这里，释放单元进一步用于在 BSS收到核心网告知 BSS当前核心网是 否允许本地交换的状态时， BSS立即释放本地交换。
以上所述， 仅为本发明的较佳实施例而已， 并非用于限定本发明的保 护范围。

Claims

权利要求书
1、 一种释放本地交换的方法， 其特征在于， 该方法包括： 基站子系统 ( BSS )收到核心网下发的释放本地交换消息； 所述 BSS根据所述释放本 地交换消息中的释放参数判决是否释放本地交换。
2、根据权利要求 1所述的方法， 其特征在于， 所述释放参数具体包括： 核心网告知 BSS释放本地交换的原因、和 /或核心网告知 BSS当前核心网是 否允许本地交换的状态。
3、 根据权利要求 2所述的方法， 其特征在于， 所述核心网告知 BSS释 放本地交换的原因是基于 BSS 自身释放本地交换的请求； 所述核心网告知 BSS当前核心网是否允许本地交换的状态是基于当前核心网的自身需要。
4、根据权利要求 2或 3所述的方法， 其特征在于， 当所述 BSS收到所 述核心网告知 BSS释放本地交换的原因时， 该方法还包括： BSS进一步结 合 BSS自身的状态判决是否释放本地交换。
5、根据权利要求 2或 3所述的方法， 其特征在于， 当所述 BSS收到所 述核心网告知 BSS当前核心网是否允许本地交换的状态时，该方法还包括： BSS立即释放本地交换。
6、 一种释放本地交换的系统， 其特征在于， 该系统包括释放单元， 用 于在 BSS收到核心网下发的释放本地交换消息的情况下， 所述 BSS根据所 述释放本地交换消息中的释放参数判决是否释放本地交换。
7、根据权利要求 6所述的系统，其特征在于， 所述释放参数具体包括： 核心网告知 BSS释放本地交换的原因、和 /或核心网告知 BSS当前核心网是 否允许本地交换的状态。
8、 根据权利要求 7所述的系统， 其特征在于， 所述核心网告知 BSS释 放本地交换的原因是基于 BSS 自身释放本地交换的请求； 所述核心网告知 BSS当前核心网是否允许本地交换的状态是基于当前核心网的自身需要。
9、 根据权利要求 7或 8所述的系统， 其特征在于， 所述释放单元， 进 一步用于在所述 BSS收到所述核心网告知 BSS释放本地交换的原因时， BSS 进一步结合 BSS自身的状态判决是否释放本地交换。
10、 根据权利要求 7或 8所述的系统， 其特征在于， 所述释放单元， 进一步用于在所述 BSS收到所述核心网告知 BSS当前核心网是否允许本地 交换的状态时， BSS立即释放本地交换。
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101185299A (zh) * 2005-05-27 2008-05-21 艾利森电话股份有限公司 无线电接入网中的本地交换
CN101742470A (zh) * 2008-11-11 2010-06-16 华为技术有限公司 一种bss本地交换的实现方法、装置和系统
CN101754416A (zh) * 2009-12-31 2010-06-23 华为技术有限公司 局间建立、解除本地交换的方法和移动交换中心

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101185299A (zh) * 2005-05-27 2008-05-21 艾利森电话股份有限公司 无线电接入网中的本地交换
CN101742470A (zh) * 2008-11-11 2010-06-16 华为技术有限公司 一种bss本地交换的实现方法、装置和系统
CN101754416A (zh) * 2009-12-31 2010-06-23 华为技术有限公司 局间建立、解除本地交换的方法和移动交换中心

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