WO2011079788A1

WO2011079788A1 - Method for establishing and releasing interexchange local switch and mobile switching center thereof

Info

Publication number: WO2011079788A1
Application number: PCT/CN2010/080420
Authority: WO
Inventors: 王宝义
Original assignee: 华为技术有限公司
Priority date: 2009-12-31
Filing date: 2010-12-29
Publication date: 2011-07-07
Also published as: CN101754416A; CN101754416B

Abstract

The embodiment of the present invention provides a method for establishing and releasing interexchange local switch and a mobile switching center thereof, wherein the method for establishing an interexchange local switch includes: determining whether a base station center (BSC) in a second base station subsystem (BSS) is the same one as a BSC that a second mobile terminal resides on, wherein the second BSS is a target BSS to which a first mobile terminal hands over; if so, then instructing the second BSS to establish a local switch for the first mobile terminal and the second mobile terminal; releasing an A-interface bearer related to the first mobile terminal; and sending an interexchange message to a second mobile switching center (MSC) that the second mobile termial resides on, so that the second MSC determines that a local switch has been established and instructs a second gateway and the target BSS to release the A-interface bearer established for the second mobile terminal. With the method for establishing an interexchange local switch, the occupancy of the A-interface can be decreased.

Description

局间建立、解除本地交换的方法和移动交换中心本申请要求于 2009 年 12 月 31 日提交中国专利局、申请号为 200910216925. 9 , 发明名称为 "局间建立、解除本地交换的方法和移动交换中心" 的中国专利申请的优先权，其全部内容通过引用结合在本申请中。技术领域 Method for establishing and releasing local exchange between offices and mobile switching center This application is filed on December 31, 2009 and submitted to the Chinese Patent Office, application number 200910216925. 9 , the invention name is "inter-office establishment, method of removing local exchange and mobile Priority of the Chinese Patent Application, the entire contents of which is hereby incorporated by reference. Technical field

本发明涉及通信技术领域，特别是涉及一种局间建立本地交换的方法、局间解除本地交换的方法和移动交换中心。背景技术 The present invention relates to the field of communications technologies, and in particular, to a method for establishing local exchange between offices, a method for canceling local exchange between offices, and a mobile switching center. Background technique

传输网络是无线通讯网络的重要组成部分。目前在很多国家和地区，由于连接无线接入网和核心网的传输资源的瓶颈，影响了运营商对无线网络的部署、运营和业务开展。 The transmission network is an important part of the wireless communication network. At present, in many countries and regions, the bottleneck of transmission resources connecting the radio access network and the core network affects the deployment, operation and service development of the wireless network by the operator.

对此，运营商一般采用微波、卫星或者租用地面传输线路的方式。合理的方案可以帮助运营商降低对传输网络带宽的占用，有效降低网络建设和运营成本。本地交换就是一种有效的降低传输资源占用的方式，对于主叫和被叫位于同一个 BSS ( Base Station Subsystem, 基站子***）内的会话，在 BSS 内完成通话链路的环回，即用户面的语音数据不流出该 BSS , 从而实现特定接口传输资源的节省。 In this regard, operators generally use microwave, satellite or leased terrestrial transmission lines. A reasonable solution can help operators reduce the occupation of transmission network bandwidth and effectively reduce network construction and operation costs. Local switching is an effective way to reduce the occupation of transmission resources. For a session in which the calling party and the called party are located in the same BSS (Base Station Subsystem), the loopback of the call link is completed in the BSS. The voice data of the face does not flow out of the BSS, thereby realizing the saving of the transmission resources of the specific interface.

如图 1 所示，一个移动交换中心与至少一个网关进行信令连接，一个网关与至少一个基站子***有线连接，每个基站子***中包括一个基站控制器和多个基站。所述本地交换包括 BTS ( Base Transceiver Station, 基站）内的本地交换和 BSC ( Base Station Controller, 基站控制器）内的本地交换。 As shown in FIG. 1, a mobile switching center performs signaling connection with at least one gateway, and a gateway is wiredly connected to at least one base station subsystem, and each base station subsystem includes a base station controller and a plurality of base stations. The local exchange includes a local exchange within a BTS (Base Transceiver Station) and a local exchange within a BSC (Base Station Controller).

对于 BTS 内的本地交换，会话双方位于同一个 BTS 内，或者是同一个 BTS簇内（对于 BTS级联的情况），语音链路的环回发生在相应的 BTS中。通过建立 BTS内的本地交换，可以实现对 Abis接口（ GSM***中， BTS和 BSC间的接口）和 A接口（GSM***中， BSS与 MSC间的接口）传输资源的节省。 For the local exchange in the BTS, the two sides of the session are located in the same BTS, or in the same BTS cluster (for the case of BTS cascading), the loopback of the voice link occurs in the corresponding BTS. By establishing a local exchange within the BTS, the transmission resources of the Abis interface (the interface between the BTS and the BSC in the GSM system) and the A interface (the interface between the BSS and the MSC in the GSM system) can be realized.

对于 BSC内的本地交换，会话双方位于同一 BSC 内，但在不同的 BTS ( BTS簇）内，语音链路环回发生在相应的 BSC中。通过建立 BSC内的本地交换，可以实现对 A接口传输资源的节省。 For local switching within the BSC, both parties are located in the same BSC, but in different BTSs (BTS clusters), the voice link loopback occurs in the corresponding BSC. By establishing local within the BSC Exchange, can save the transmission resources of the A interface.

发明人在实现本发明的过程中，发现现有技术至少存在如下问题：现有技术中只定义了局内（即主被叫都由同一个移动交换中心 MSC控制）建立和解除本地交换的方案，而没有局间（即主被叫由不同的 MSC控制）建立和解除本地交换的方案，这会导致在 MSC Pool、前转和漫游等场景下，跨 MSC但主被叫在同一个 BSC的呼叫，无法使用本地交换，造成对有线资源的 A接口和 Ab is接口的大量占用。发明内容 In the process of implementing the present invention, the inventor has found that at least the following problems exist in the prior art: In the prior art, only the intra-office (that is, the master and the called party are all controlled by the same mobile switching center MSC) to establish and release the local exchange scheme is defined. There is no inter-office (that is, the master and the called are controlled by different MSCs) to establish and release the local exchange scheme, which will result in the call of the same BSC across the MSC but in the scenario of MSC Pool, Forwarding and Roaming. The local exchange cannot be used, resulting in a large occupation of the A interface and the Ab is interface of the wired resource. Summary of the invention

本发明实施例的目的是提供一种局间建立、解除本地交换的方法和移动交换中心，以减少局间会话对 A接口和 Abis接口的占用。 The purpose of the embodiments of the present invention is to provide a method for establishing and releasing local exchanges and a mobile switching center to reduce the occupation of the A interface and the Abis interface by the interoffice session.

本发明实施例提供了一种局间建立本地交换的方法，包括： The embodiment of the invention provides a method for establishing local exchange between offices, including:

判断第二基站子*** BSS 中的基站控制器 BSC与第二移动终端所在的 Determining the location of the base station controller BSC and the second mobile terminal in the second base station subsystem BSS

BSC是否为同一 BSC, 其中，所述第二 BSS为第一移动终端执行切换的目标Whether the BSC is the same BSC, where the second BSS is a target for performing handover by the first mobile terminal

BSS; BSS;

若是，则指示第二 BSS为第一移动终端和第二移动终端建立本地交换；释放与第一移动终端相关的 A口^ L载； If yes, instructing the second BSS to establish a local exchange between the first mobile terminal and the second mobile terminal; releasing the A port associated with the first mobile terminal;

向第二移动终端所在的第二移动交换中心 MSC发送局间消息，以使第二 MSC判断本地交换已建立并指示第二网关和目标 BSS释放为第二移动终端建立的 A口承载。 Sending an inter-office message to the second mobile switching center MSC where the second mobile terminal is located, so that the second MSC determines that the local exchange has been established and instructs the second gateway and the target BSS to release the A-port bearer established for the second mobile terminal.

本发明实施例还提供了一种局间解除本地交换的方法，包括： The embodiment of the invention further provides a method for inter-office release local exchange, including:

建立与第三移动终端相关的 A口^载； Establishing an A port associated with the third mobile terminal;

向第四移动终端所在的第四移动交换中心 MSC发送局间消息，以使第四 MSC判断第三 BSS中的基站控制器 BSC与第四移动终端所在的 BSC不是同一个 BSC, 其中，第三移动终端由第四 BSS切换到第三 BSS; Sending an inter-office message to the fourth mobile switching center MSC where the fourth mobile terminal is located, so that the fourth MSC determines that the base station controller BSC in the third BSS is not the same BSC as the fourth mobile terminal, where the third The mobile terminal is switched by the fourth BSS to the third BSS;

解除在第四 BSS上为第三移动终端和第四移动终端建立的本地交换；建立与第四移动终端相关的 A口承载。 And canceling the local exchange established for the third mobile terminal and the fourth mobile terminal on the fourth BSS; establishing an A port bearer associated with the fourth mobile terminal.

本发明实施例还提供了一种移动交换中心，包括： The embodiment of the invention further provides a mobile switching center, including:

判断模块，用于判断第二基站子*** BSS中的基站控制器 BSC与第二移动终端所在的 BSC是否为同一 BSC,其中，所述第二 BSS为第一移动终端执行切换的目标 BSS; 指示模块，用于当第二 BSS中的 BSC与第二移动终端所在的 BSC相同时，指示第二 BSS为第一移动终端和第二移动终端建立本地交换； a determining module, configured to determine whether the base station controller BSC in the second base station subsystem BSS and the BSC in which the second mobile terminal is located is the same BSC, wherein the second BSS is a target BSS for performing handover of the first mobile terminal; And an indication module, configured to: when the BSC in the second BSS is the same as the BSC where the second mobile terminal is located, instruct the second BSS to establish a local exchange between the first mobile terminal and the second mobile terminal;

发送模块，用于向第二移动终端所在的对端移动交换中心 MSC发送局间消息，以使对端 MSC判断本地交换已建立并指示第二网关和目标 BSS释放为第二移动终端建立的 A口承载。 And a sending module, configured to send an inter-office message to the peer mobile switching center MSC where the second mobile terminal is located, so that the peer MSC determines that the local exchange has been established and instructs the second gateway and the target BSS to release the A established by the second mobile terminal. Port bearer.

接收模块，用于接收对端移动交换中心 MSC发送的局间消息；判断模块，用于根据所述局间消息判断第二基站子*** BSS中的基站控制器 BSC与第二移动终端所在的 BSC是否为同一 BSC,其中，所述第二 BSS 为第一移动终端执行切换的目标 BSS; a receiving module, configured to receive an inter-office message sent by the peer mobile switching center MSC, and a determining module, configured to determine, according to the inter-office message, a base station controller BSC in the second base station subsystem BSS and a BSC where the second mobile terminal is located Whether it is the same BSC, wherein the second BSS performs a handover target BSS for the first mobile terminal;

指示模块，用于当第二 BSS中的 BSC与第二移动终端所在的 BSC不同时，指示第二 BSS解除为第一移动终端和第二移动终端建立的本地交换，建立与第四移动终端相关的 A口承载。 And an indication module, configured to: when the BSC in the second BSS is different from the BSC in which the second mobile terminal is located, instruct the second BSS to cancel the local exchange established for the first mobile terminal and the second mobile terminal, and establish a relationship related to the fourth mobile terminal The A port is carried.

本发明实施例的局间建立、解除本地交换的方法和移动交换中心，在进行通话的双方中的一方切换 B SC后，若判断出双方所在的 B SC为同一个，则发生切换的一方所属的 MSC将发生切换的一方的目标 BSC标识发送给对端 MSC, 以使两个 MSC指示对应的网关和 BSS释放与所述双方对应的 A口承载，减少了局间会话对 A接口和 Abis接口的占用；在进行本地会话的双方中的一方切换 BSC后，解除本地会话，实现局间建立本地交换、解除本地交换的连贯性。附图说明 In the embodiment of the present invention, the method for establishing the local exchange, the local exchange, and the mobile switching center, after switching the B SC by one of the parties performing the call, and determining that the B SCs of the two parties are the same, The MSC sends the target BSC identity of the party that has the handover to the peer MSC, so that the two MSCs indicate that the corresponding gateway and the BSS release the A port bearer corresponding to the two parties, and reduce the interoffice session to the A interface and the Abis interface. Occupation; After one of the parties performing the local session switches the BSC, the local session is released, and the local exchange is established between the offices, and the continuity of the local exchange is achieved. DRAWINGS

图 1是局内会话中的本地交换示意图； Figure 1 is a schematic diagram of local exchange in an intra-office session;

图 2是本发明实施例的局间建立本地交换的方法实施例的流程示意图；图 3 是本发明实施例的局间建立本地交换的方法的一个具体实施例的流程示意图； 2 is a schematic flowchart of an embodiment of a method for establishing local exchange between offices according to an embodiment of the present invention; FIG. 3 is a schematic flowchart of a specific embodiment of a method for establishing local exchange between offices according to an embodiment of the present invention;

图 4是本发明实施例的局间解除本地交换的方法实施例的流程示意图；图 5是本发明实施例的局间解除本地交换的方法的一个具体实施例的流程示意图； 4 is a schematic flowchart of an embodiment of a method for canceling local exchange in the embodiment of the present invention; FIG. 5 is a schematic flowchart of a specific embodiment of a method for canceling local exchange between offices according to an embodiment of the present invention;

图 6是本发明实施例的移动交换中心的一个实施例的框架示意图；图 7是本发明实施例的移动交换中心的另一个实施例的框架示意图。具体实施方式 6 is a schematic diagram of a framework of an embodiment of a mobile switching center according to an embodiment of the present invention; and FIG. 7 is a schematic diagram of another embodiment of a mobile switching center according to an embodiment of the present invention. detailed description

为使本发明的上述目的、特征和优点能够更加明显易懂，下面结合附图和具体实施方式对本发明实施例作进一步详细的说明。 The above described objects, features, and advantages of the present invention will be more apparent from the aspects of the appended claims.

实施例一 Embodiment 1

本发明实施例提供了一种局间建立本地交换的方法，如图 2所示，包括： An embodiment of the present invention provides a method for establishing a local exchange between offices, as shown in FIG. 2, including:

5101 ,判断第二基站子*** BSS中的基站控制器 BSC与第二移动终端所在的 BSC是否为同一 BSC, 若是，则指示第二 BSS为第一移动终端和第二移动终端建立本地交换。 5101. Determine whether the base station controller BSC in the second base station subsystem BSS is the same BSC as the second mobile terminal, and if yes, instruct the second BSS to establish a local exchange between the first mobile terminal and the second mobile terminal.

其中，所述第二 BSS为第一移动终端执行切换的目标 BSS。 The second BSS is a target BSS that performs handover by the first mobile terminal.

在第一移动终端所在的第一 MSC指示第二 B SS为第一移动终端和第二移动终端建立本地交换的同时，还包括：第一 MSC指示第二 BSS为第一移动终端准备无线承载。 While the first MSC where the first mobile terminal is located indicates that the second B SS establishes a local exchange between the first mobile terminal and the second mobile terminal, the method further includes: the first MSC instructing the second BSS to prepare the radio bearer for the first mobile terminal.

在所述判断第二 BSS中的 BSC与第二移动终端所在的 BSC是否为同一 BSC之前，还包括：第一 MSC指示第一网关和第二 BSS为第一移动终端建立 A 口承载。 Before the determining whether the BSC in the second BSS and the BSC in the second mobile terminal are the same BSC, the method further includes: the first MSC instructing the first gateway and the second BSS to establish an A port bearer for the first mobile terminal.

5102 , 释放与第一移动终端相关的 A口承载。 5102. Release an A port bearer associated with the first mobile terminal.

其中，在切换后是由第一网关为第一移动终端提供 A接口，在切换前后第二网关为第二移动终端提供 A接口。当第一 MSC指示第二 BSS为第一移动终端和第二移动终端建立了本地承载后，第一 MSC会指示第一网关和第二 BSS释放为第一移动终端建立的承载。 After the handover, the first gateway provides an A interface for the first mobile terminal, and the second gateway provides an A interface for the second mobile terminal before and after the handover. After the first MSC indicates that the second BSS establishes a local bearer for the first mobile terminal and the second mobile terminal, the first MSC instructs the first gateway and the second BSS to release the bearer established for the first mobile terminal.

5103 , 向第二移动终端所在的第二移动交换中心 MSC发送局间消息，以使第二 MSC判断本地交换已建立并指示第二网关和目标 B S S释放为第二移动终端建立的 A口承载。 5103. Send an inter-office message to the second mobile switching center MSC where the second mobile terminal is located, so that the second MSC determines that the local exchange has been established and instructs the second gateway and the target B S S to release the A-port bearer established for the second mobile terminal.

当第一移动终端从第一 BSS切换到第二 BSS后，第一 MSC将局间消息发送给第二 MSC, 第二 MSC根据局间消息判断出本地交换已建立，指示第二 BSS 和第二网关释放为第二移动终端建立的 A口承载。 After the first mobile terminal switches from the first BSS to the second BSS, the first MSC sends an interoffice message to the second MSC, and the second MSC determines, according to the interoffice message, that the local exchange has been established, indicating the second BSS and the second The gateway releases the A port bearer established for the second mobile terminal.

所述局间消息为本地呼叫本地交换 LCLS消息或 INF信息消息，可以包括第二 B SS的 B SC标识，还可以进一步包括本地交换已建立的指示。 The interoffice message is a local call local exchange LCLS message or an INF information message, and may include a B SC identifier of the second B SS, and may further include an indication that the local exchange has been established.

本发明实施例提供两种第二 MSC判断本地交换已建立的方式： The embodiment of the present invention provides two ways for the second MSC to determine that the local exchange has been established:

1 )第二 MSC根据接收的 BSC标识判断出第一移动终端和第二移动终端所在的 BSC为同一个，向第二 BSS发送本地交换建立请求，根据接收到的第二 BSS发送的本地交换建立响应，确定第一移动终端和第二移动终端之间的本地交换已建立。 1) The second MSC determines, according to the received BSC identifier, that the BSC where the first mobile terminal and the second mobile terminal are located is the same, and sends a local exchange establishment request to the second BSS, according to the received second The local exchange setup response sent by the BSS determines that a local exchange between the first mobile terminal and the second mobile terminal has been established.

2 )与所述 BSC标识同时发送的还包括本地交换已建立的指示，则第二 MSC通过接收的所述本地交换已建立的指示，确定第一移动终端和第二移动终端之间的本地交换已建立。 2) transmitting, simultaneously with the BSC identity, an indication that the local exchange has been established, and the second MSC determines the local exchange between the first mobile terminal and the second mobile terminal by using the received indication that the local exchange has been established. It has been established.

上述步骤 S102和 S103不限制执行的先后顺序。 The above steps S102 and S103 do not limit the order of execution.

在进行局间通话的双方中的一方切换 BSC后，若判断出双方所在的 BSC 为同一个，则发生切换的一方所属的 MSC将发生切换的一方的目标 BSC标识发送给对端 MSC, 以使两个 MSC指示对应的网关和 BSS释放与所述双方对应的 A口承载，减少了局间会话对 A接口和 Abis接口的占用。 After one of the parties performing the interoffice call switches the BSC, if it is determined that the BSCs of the two parties are the same, the MSC to which the handover party belongs sends the target BSC identity of the handover party to the opposite MSC, so that The two MSCs indicate that the corresponding gateway and the BSS release the A-port bearer corresponding to the two parties, which reduces the occupation of the A-interface and the Abis interface by the inter-office session.

下面结合附图对本实施例进行详细说明。 The embodiment will be described in detail below with reference to the accompanying drawings.

第一移动终端正在和第二移动终端进行局间通话，如图 3所示，所述步骤 S 101具体可以包括如下步骤： The first mobile terminal is performing an inter-office call with the second mobile terminal. As shown in FIG. 3, the step S101 may specifically include the following steps:

5111 , 第一 MSC接收第一移动终端所在的第一 BSS发送的切换请求 handover required消息，所述切换请求中携带有目标小区的标识，第一 MSC根据预存的小区标识与 BSS之间的对应关系，查找出第一移动终端所要切换的目标侧 BSS , 本实施例中目标侧 BSS为第二 BSS; The first MSC receives the handover request handover required message sent by the first BSS where the first mobile terminal is located, where the handover request carries the identifier of the target cell, and the first MSC according to the correspondence between the pre-stored cell identifier and the BSS The target side BSS to be switched by the first mobile terminal is found, and the target side BSS is the second BSS in this embodiment;

5112 , 第一 MSC向第一网关发送建立承载 ADD REQ消息，为第一移动终端申请切换后的 A口承载；步骤 S 112中，第一 MSC还会同时向第二 BSS申请 A 接口，以使第一网关能够与第二 BSS建立 A口^^栽；第一网关在切换后为第一移动终端提供 A口承栽； 5112, the first MSC sends a bearer ADD REQ message to the first gateway, and applies for the switched A port bearer for the first mobile terminal. In step S112, the first MSC also applies for the A interface to the second BSS at the same time, so that The first gateway can establish an A port with the second BSS; the first gateway provides the A port for the first mobile terminal after the handover;

5113 , 第一网关向第一 MSC返回建立承载响应 ADD Reply消息，表示 A口 ^^载建立成功； 5113. The first gateway returns a setup bearer response ADD Reply message to the first MSC, indicating that the A port is successfully established.

S 114，第一 MSC判断出第一移动终端切换后所在的 BSC与第二移动终端所在的 BSC为同一 BSC, 向第二 BSS发送携带有建立本地交换指示的切换要求 handover request消息，指示第二 B S S为第一移动终端和第二移动终端建立本地交换并为第一移动终端准备无线承载； S114, the first MSC determines that the BSC where the first mobile terminal is switched and the BSC where the second mobile terminal is located is the same BSC, and sends a handover request handover request message carrying the local exchange indication to the second BSS, indicating the second The BSS establishes a local exchange for the first mobile terminal and the second mobile terminal, and prepares a radio bearer for the first mobile terminal;

S115 , 第二 BSS准备好无线承载并建立本地交换后，向第一 MSC返回携带有本地交换建立完成指示的切换要求响应 handover request ack消息。 S115. After the second BSS prepares the radio bearer and establishes the local exchange, returns a handover request response handover request ack message carrying the local exchange setup completion indication to the first MSC.

步骤 S103具体可以包括如下步骤： SI 16 , 第一 MSC向第一 BSS发送切换命令 handover command消息，指示第一 B S S对第一移动终端进行切换； Step S103 may specifically include the following steps: SI 16, the first MSC sends a handover command handover command message to the first BSS, instructing the first BSS to switch the first mobile terminal;

S117 , 当第二 BSS检测到第一移动终端的接入后，向第一 MSC发送切换检测] landover detect消息； S117, after the second BSS detects the access of the first mobile terminal, sends a handover detection] landover detect message to the first MSC;

S118 , 第二 BSS完成对第一移动终端的切换后，向第一 MSC发送切换完成 handover complete消息，通知第一 MSC第一移动终端的切换完成； S118. After completing the handover to the first mobile terminal, the second BSS sends a handover completed complete message to the first MSC, and notifies the first MSC that the handover of the first mobile terminal is completed.

S 119，第一 MSC向第二移动终端所在的第二 MSC发送携带有第一移动终端所在的目标 BSC的标识的本地呼叫本地交换 LCLS消息；第一 MSC也可以向第二 MSC发送携带有所述目标 BSC的标识的信息 INF消息，第二 MSC接收到所述 INF消息后需要返回信息要求 INR消息；所述 LCLS消息和 INF消息还可以携带本地交换已建立的指示。 S 119. The first MSC sends a local call local exchange LCLS message carrying the identifier of the target BSC where the first mobile terminal is located to the second MSC where the second mobile terminal is located. The first MSC may also send the bearer to the second MSC. The information INF message of the identifier of the target BSC, after receiving the INF message, the second MSC needs to return an information request INR message; the LCLS message and the INF message may also carry an indication that the local exchange has been established.

本发明实施例中的 LCLS消息可以是新增的 MAP( Mobile Application Part, 移动应用部分）消息，如表 1所示，包括如下字段： The LCLS message in the embodiment of the present invention may be a new MAP (Mobile Application Part) message, as shown in Table 1, and includes the following fields:

表 1 Table 1

其中，字段 Access Network Signaling Point Code的值为第一移动终端切换后所在的目标 BSC标识； LCLS ind取值可以为： LCLS建立请求、 LCLS建立允许、 LCLS建立拒绝、 LCLS解除请求、 LCLS解除允许、 LCLS解除拒绝、 LCLS 限制或本地交换已建立。 The value of the Access Network Signaling Point Code is the target BSC ID of the first mobile terminal after the handover. The LCLS ind value can be: LCLS establishment request, LCLS establishment permission, LCLS establishment rejection, LCLS release request, LCLS release permission, LCLS Decommission, LCLS Restriction, or Local Exchange has been established.

本发明实施例中的 INF消息可以是进行了扩展的 ISUP ( ISDN User Part , ISDN用户部分）消息，如表 2所示，包括如下字段： The INF message in the embodiment of the present invention may be an extended ISUP (ISDN User Part) message, as shown in Table 2, including the following fields:

表 2 Table 2

Parameter Type Length ( octets ) Parameter Type Length ( octets )

Message type F 1 Message type F 1

Information indicators (national use) F 2 Information indicators (national use) F 2

Calling party's category 0 3 Calling party's category 0 3

Calling party number (Note) 0 4- Call reference (national use) 0 7 Calling party number (Note) 0 4- Call reference (national use) 0 7

Connection request 0 7-9 Connection request 0 7-9

Access Network Signaling Point Code 0 1 Access Network Signaling Point Code 0 1

LCLS Ind 0 1 LCLS Ind 0 1

Parameter compatibility information 0 4- Parameter compatibility information 0 4-

Network specific facility 0 4-Network specific facility 0 4-

End of optional parameters 0 1 End of optional parameters 0 1

其中，字段 Information indicators (national use)?文为用于指示其后面字段的有效性，如为 0则代表后面字段无效，为 1则代表后面字段有效；新增的 Access Network Signaling Point Code的值为第一移动终端切换后所在的目标 BSC标识；新增的 LCLS ind取值可以为： LCLS建立请求、 LCLS建立允许、 LCLS建立拒绝、 LCLS解除请求、 LCLS解除允许、 LCLS解除拒绝、 LCLS限制或本地交换已建立。 The field Information indicators (national use) is used to indicate the validity of the field behind it. If it is 0, it means the following field is invalid. If it is 1, it means the following field is valid. The value of the newly added Access Network Signaling Point Code is The target BSC ID of the first mobile terminal is switched. The value of the added LCLS ind can be: LCLS establishment request, LCLS establishment permission, LCLS establishment rejection, LCLS release request, LCLS release permission, LCLS release rejection, LCLS restriction, or local. The exchange has been established.

作为 INF消息的响应消息， INR消息也进行了修改，如表 3所示，包括如下字段： As a response message to the INF message, the INR message is also modified, as shown in Table 3, including the following fields:

表 3 table 3

其中 Information request indicators (national use)?丈为用于指示其后面字段的有效性，新增的 LCLS Ind取值可以为： LCLS建立请求、 LCLS建立允许、 LCLS建立拒绝、 LCLS解除请求、 LCLS解除允许、 LCLS解除拒绝或 LCLS限制。 The information request indicators (national use) are used to indicate the validity of the following fields. The value of the added LCLS Ind can be: LCLS establishment request, LCLS establishment permission, LCLS establishment rejection, LCLS release request, LCLS release permission. , LCLS release rejection or LCLS restrictions.

在步骤 S119的同时，执行 S120: 第一 MSC向第一 BSS发送清除命令 Clear command消息，指示第一 B S S释放为第一移动终端建立的无线承载； At the same time as step S119, S120 is performed: the first MSC sends a clear command Clear command to the first BSS, indicating that the first B S S is released as a radio bearer established by the first mobile terminal;

5121 ,第一 BSS释放完成后向第一 MSC返回清除完成 Clear Complete消息；步骤 S 102可以包括步骤 S 122和 S 123: After the first BSS release is completed, the clear completion message is returned to the first MSC. Step S102 may include steps S122 and S123:

5122, 第一 MSC向第一网关发送删除请求 SUB REQ消息，指示第一网关释放为第一移动终端建立的 A口承载； S122, the first MSC sends a delete request SUB REQ message to the first gateway, indicating that the first gateway releases the A port bearer established for the first mobile terminal;

步骤 S122中，第一 MSC还会指示第二 BSS释放为第一移动终端分配的 A接口，使第二 BSS与第一网关释放为第一移动终端建立的 A口承载。 In step S122, the first MSC further instructs the second BSS to release the A interface allocated to the first mobile terminal, so that the second BSS and the first gateway release the A port bearer established by the first mobile terminal.

5123 , 第一网关向第一 MSC返回删除响应 SUB REPLY消息； 5124, 第二 MSC收到第一 MSC发送的 LCLS消息后，通过上述两种方式判断第一移动终端和第二移动终端已建立本地交换，则向第二 B SS发送本地交换命令 Local Switch Command消息，指示第二 BSS建立本地交换； 5123. The first gateway returns a delete response SUB REPLY message to the first MSC. After receiving the LCLS message sent by the first MSC, the second MSC determines that the first mobile terminal and the second mobile terminal have established local exchange by using the foregoing two manners, and sends a local exchange command Local Switch Command message to the second B SS. Instructing the second BSS to establish a local exchange;

5125 ,第二 BSS向第二 MSC返回本地交换完成 Local Switch Complete消息；由于本地交换已经由第一 MSC指示建立，此处第二 BSS是向第二 MSC返回一个响应，而没有实际的动作。 5125. The second BSS returns a local exchange complete Local Switch Complete message to the second MSC. Because the local exchange has been established by the first MSC, where the second BSS returns a response to the second MSC, there is no actual action.

5126, 第二 MSC向第二网关发送删除请求 SUB REQ消息，指示第二网关释放为第二移动终端建立的承载； 5126, the second MSC sends a delete request SUB REQ message to the second gateway, instructing the second gateway to release the bearer established for the second mobile terminal;

在步骤 S 126的同时，第二 MSC还会指示第二 BSS释放为第二移动终端分配的 A接口，使第二 BSS与第二网关释放为第二移动终端建立的 A口承载。 At the same time as step S 126, the second MSC also instructs the second BSS to release the A interface allocated for the second mobile terminal, so that the second BSS and the second gateway release the A port bearer established for the second mobile terminal.

5127 , 第二网关 MGW向第二 MSC返回删除响应 SUB REPLY消息。 5127. The second gateway MGW returns a delete response SUB REPLY message to the second MSC.

由此，第一移动终端和第二移动终端之间的局间本地交换建立完成。可以理解的是，所述第一网关和第二网关也可以为同一个；而且上述流程中省略了一些与切换过程相关的步骤，如第一 BSS在第一移动终端切换后自动释放为第一移动终端分配的 A接口，第一 MSC指示第一移动终端切换前所在的网关释放为第一移动终端分配的 A接口等，但并不影响对本实施例所公开的技术方案的理解。 Thereby, the interoffice local exchange establishment between the first mobile terminal and the second mobile terminal is completed. It can be understood that the first gateway and the second gateway may also be the same one; and some steps related to the handover process are omitted in the foregoing process, for example, the first BSS is automatically released as the first after the first mobile terminal switches. The A interface allocated by the mobile terminal, the first MSC indicates that the gateway where the first mobile terminal is located before the handover is released as the A interface and the like allocated by the first mobile terminal, but does not affect the understanding of the technical solution disclosed in this embodiment.

本实施例的局间建立本地交换的方法，在进行局间通话的双方中的一方切换 BSC后，若判断出双方所在的 BSC为同一个 BSC, 则发生切换的一方所属的 MSC将发生切换的一方的目标 BSC标识发送给对端 MSC，以使两个 MSC指示对应的网关释放与所述双方对应的 A口承载，减少了局间会话对 A接口和 Abis接口的占用。实施例二 In the method of establishing local exchange between the two parties in the embodiment, after one of the parties performing the interoffice call switches the BSC, if it is determined that the BSC where the two parties are located is the same BSC, the MSC to which the handover party belongs will be switched. The target BSC ID of one party is sent to the peer MSC, so that the two MSCs indicate that the corresponding gateway releases the A port bearer corresponding to the two parties, which reduces the occupation of the A interface and the Abis interface by the interoffice session. Embodiment 2

本实施例提供了一种局间解除本地交换的方法，如图 4所示，包括： S201 , 建立与第三移动终端相关的 A口承载； The embodiment provides a method for canceling the local exchange between the parties. As shown in FIG. 4, the method includes: S201, establishing an A port bearer associated with the third mobile terminal;

在第三移动终端和第四移动终端通过本地交换进行通话的过程中，当第三移动终端要从第四 BS S切换到第三 B S S时，第三 MSC指示第三网关和第三 BSS为第三移动终端建立 A口承载； In the process of the third mobile terminal and the fourth mobile terminal making a call by local exchange, when the third mobile terminal is to be handed over from the fourth BS S to the third BSS, the third MSC indicates that the third gateway and the third BSS are the first The third mobile terminal establishes an A port bearer;

步骤 S201之后，还包括：第三 MSC指示第三 BSS为第三移动终端准备无线承载。 5202 , 向第四移动终端所在的第四移动交换中心 MSC发送局间消息，以使第四 MSC判断第三 BSS中的基站控制器 BSC与第四移动终端所在的 BSC不是同一个 BSC。 After step S201, the method further includes: the third MSC instructing the third BSS to prepare a radio bearer for the third mobile terminal. S202: Send an inter-office message to the fourth mobile switching center MSC where the fourth mobile terminal is located, so that the fourth MSC determines that the base station controller BSC in the third BSS is not the same BSC as the fourth mobile terminal.

其中，第三移动终端由第四 BSS切换到第三 BSS。 The third mobile terminal is switched from the fourth BSS to the third BSS.

5203 , 解除在第四 BSS上为第三移动终端和第四移动终端建立的本地交换。 5203. Release the local exchange established for the third mobile terminal and the fourth mobile terminal on the fourth BSS.

其中，局间消息同实施例一中定义，所述局间消息包括第三 BSS的 BSC标识。 The interoffice message is defined in the first embodiment, and the interoffice message includes the BSC identifier of the third BSS.

5204 , 建立与第四移动终端相关的 A口承载。 5204. Establish an A port bearer associated with the fourth mobile terminal.

在局间建立了本地交换之后，本实施例提供的解除本地交换的方法可以与实施例一进行良好的配合，进一步实现局间建立本地交换、解除本地交换的连贯性。 After the local exchange is established between the local offices, the method for releasing the local exchange provided by the embodiment can be well coordinated with the first embodiment, and the local exchange between the local exchange and the local exchange can be further implemented.

第三移动终端正在和第四移动终端通过本地交换进行通话，如图 5所示，所述步骤 S201具体可以包括如下步骤： The third mobile terminal is in the process of making a call with the fourth mobile terminal by using the local exchange. As shown in FIG. 5, the step S201 may specifically include the following steps:

5211 , 第三 M S C接收第三移动终端所在的第四 B S S发送的切换请求 handover required消息； The third M S C receives the handover request handover required message sent by the fourth B S S where the third mobile terminal is located;

5212 , 第三 MSC向第三网关发送建立承载 ADD REQ消息，为第三移动终端申请切换后的承载；步骤 S212中，第三 MSC还会同时向第四 BSS申请 A接口，以使第三网关能够与第四 B SS建立 A口承栽；第三网关在切换后为第三移动终端提供 A口承载； The third MSC sends a bearer ADD REQ message to the third gateway, and applies for the bearer after the handover to the third mobile terminal. In step S212, the third MSC also applies for the A interface to the fourth BSS to enable the third gateway. The A port can be established with the fourth B SS; the third gateway provides the A port bearer for the third mobile terminal after the handover;

5213 , 第三网关向第三 MSC返回建立承载响应 ADD Reply消息，表示 A口 ^^载建立成功； 5213. The third gateway returns an ADD Reply message to the third MSC, indicating that the A port is successfully established.

5214 , 第三 MSC向第三 BSS发送切换要求 handover request消息，指示第三 BS S为第三移动终端准备无线承载； The third MSC sends a handover request handover request message to the third BSS, instructing the third BS S to prepare a radio bearer for the third mobile terminal.

5215 , 第三 BSS准备好无线承栽后，向第三 MSC返回切换要求响应 handover request ack消息。 5215. After the third BSS is ready for wireless bearer, return a handover request response handover request ack message to the third MSC.

步骤 S202具体可以包括如下步骤： Step S202 may specifically include the following steps:

5216 , 第三 MSC向第四 BSS发送切换命令 handover command消息，指示第四 B S S对第三移动终端进行切换； 5217 , 当第三 BSS检测到第三移动终端的接入后，向第三 MSC发送切换检测 handover detect消息； 5216. The third MSC sends a handover command handover command message to the fourth BSS, instructing the fourth BSS to switch to the third mobile terminal. After the third BSS detects the access of the third mobile terminal, the third BSS sends a handover detection handover detect message to the third MSC.

5218, 第三 BSS完成对第三移动终端的切换后，向第三 MSC发送切换完成 handover complete消息，通知第三 MSC第三移动终端的切换完成； After the third BSS completes the handover to the third mobile terminal, the third BSS sends a handover completion complete message to the third MSC, and notifies the third MSC that the handover of the third mobile terminal is completed.

5219 , 第三 MS C向第四移动终端所在的第四 MSC发送携带有第三移动终端所在的目标 BSC的标识的 LCLS消息；第三 MSC也可以向第四 MSC发送携带有所述目标 BSC的标识的信息 INF消息，第四 MSC接收到所述 INF后需要返回信息要求 INR消息； 5219. The third MS C sends an LCLS message carrying the identifier of the target BSC where the third mobile terminal is located to the fourth MSC where the fourth mobile terminal is located. The third MSC may also send the fourth MSC with the target BSC. The identified information INF message, after receiving the INF, the fourth MSC needs to return an information request INR message;

在步骤 S219的同时，执行 S220: 第三 MSC向第四 BSS发送清除命令 Clear command消息，指示第四 B S S释放为第三移动终端建立的无线承载； At the same time as step S219, S220 is performed: the third MSC sends a clear command Clear command to the fourth BSS, indicating that the fourth B S S is released as a radio bearer established by the third mobile terminal;

5221 ,第四 BSS释放完成后向第三 MSC返回清除完成 Clear Complete消息；步骤 S203具体可以包括如下步骤： After the fourth BSS is released, the clear completion message is returned to the third MSC. Step S203 may specifically include the following steps:

5222 , 第四 MSC收到第三 MSC发送的所述目标 BSC标识后，判断第三移动终端和第四移动终端所在的 BSC不是同一个 BSC, 需要解除本地交换，则向第四 BSS发送本地交换释放 Local Switch Release消息，指示第四 BSS释放本地交换； After receiving the target BSC identifier sent by the third MSC, the fourth MSC determines that the BSC where the third mobile terminal and the fourth mobile terminal are located are not the same BSC, and needs to release the local exchange, and then send the local exchange to the fourth BSS. Release the Local Switch Release message, instructing the fourth BSS to release the local exchange;

5223 , 第四 BSS向第四 MSC返回本地交换释放完成 Local Switch Release Complete消息； 5223. The fourth BSS returns a local exchange release completion message to the fourth MSC.

步骤 S204具体可以包括如下步骤： Step S204 may specifically include the following steps:

5224, 第四 MSC向第四网关发送建立承载 ADD REQ消息，指示第四网关为第四移动终端建立 A口承载； 5224, the fourth MSC sends a bearer ADD REQ message to the fourth gateway, and instructs the fourth gateway to establish an A port bearer for the fourth mobile terminal.

步骤 S224中，第四 MSC还会指示第四 BSS为第四移动终端分配 A接口，使第四 BSS与第四网关为第四移动终端建立 A口承载。 In step S224, the fourth MSC further instructs the fourth BSS to allocate an A interface to the fourth mobile terminal, so that the fourth BSS and the fourth gateway establish an A port bearer for the fourth mobile terminal.

5225 , 第四网关向第四 MSC返回建立承载响应 ADD Reply消息，表示 A口 ^^载建立成功； 5225. The fourth gateway returns an ADD Reply message to the fourth MSC, indicating that the A port is successfully established.

5226 , 第四 MSC向第四 BSS发送指配请求 Assignment Request消息，指示第四 BSS为第四移动终端准备无线承载； 5226, the fourth MSC sends an assignment request to the fourth BSS, and the fourth BSS is configured to prepare a radio bearer for the fourth mobile terminal.

S227，第四 BSS向第四 MSC返回指配完成 Assignment Complete消息；由于第四移动终端可以继续使用切换前的无线承载，因此第四 BSS不会再为第四移动终端准备无线承载，仅返回一个响应。 S227. The fourth BSS returns an assignment to the fourth MSC to complete the Assignment Complete message. Because the fourth mobile terminal can continue to use the radio bearer before the handover, the fourth BSS does not prepare the radio bearer for the fourth mobile terminal, and only returns one. response.

至此，第三移动终端和第四移动终端之间的局间本地交换解除完成。可以理解的是，所述第三网关和第四网关也可以为同一个；而且上述流程中省略了一些与切换过程相关的步骤，如第四 BSS在第三移动终端切换后自动释放为第三移动终端分配的 A接口，第三 MSC指示第三移动终端切换前所在的网关释放为第三移动终端分配的 A接口等，但并不影响对本实施例所公开的技术方案的理解。 So far, the inter-office local exchange between the third mobile terminal and the fourth mobile terminal is released. It can be understood that the third gateway and the fourth gateway may also be the same one; and some steps related to the handover process are omitted in the foregoing process, for example, the fourth BSS is automatically released as the third after the third mobile terminal switches. The A interface is allocated by the mobile terminal, and the third MSC indicates that the gateway where the third mobile terminal is located before the switchover releases the A interface assigned to the third mobile terminal, but does not affect the understanding of the technical solution disclosed in this embodiment.

本实施例的局间解除本地交换的方法，提供了解除局间本地交换的方案 , 能够与实施例一进行良好的配合，进一步实现局间建立本地交换、解除本地交换的连贯性。实施例三 The method for canceling the local exchange in the inter-office manner of the present embodiment provides a scheme for canceling the local exchange between the inter-offices, and can cooperate well with the first embodiment to further implement the local exchange between the inter-office and the coherence of the local exchange. Embodiment 3

本实施例提供了一种移动交换中心，如图 6所示，包括：判断模块 10、指示模块 20和发送模块 30。 This embodiment provides a mobile switching center. As shown in FIG. 6, the method includes: a determining module 10, an indicating module 20, and a sending module 30.

所述判断模块 10，用于判断第二 BSS中的 BSC与第二移动终端所在的 BSC 是否为同一 BSC, 其中，所述第二 BSS为第一移动终端执行切换的目标 BSS。 The determining module 10 is configured to determine whether the BSC in the second BSS and the BSC in which the second mobile terminal is located are the same BSC, where the second BSS is a target BSS in which the first mobile terminal performs handover.

所述指示模块 20，用于当第二 BSS中的 BSC与第二移动终端所在的 BSC相同时，指示第二 BSS为第一移动终端和第二移动终端建立本地交换。 The indication module 20 is configured to: when the BSC in the second BSS is the same as the BSC where the second mobile terminal is located, instruct the second BSS to establish a local exchange between the first mobile terminal and the second mobile terminal.

所述发送模块 30，用于向第二移动终端所在的对端 MSC发送局间消息，以使对端 MSC判断本地交换已建立并指示第二网关和目标 BSS释放为第二移动终端建立的 A口承载。 The sending module 30 is configured to send an inter-office message to the opposite MSC where the second mobile terminal is located, so that the peer MSC determines that the local exchange has been established and instructs the second gateway and the target BSS to release the A established by the second mobile terminal. Port bearer.

所述发送模块发送的局间消息为本地呼叫本地交换 LCLS消息或 INF信息消息；所述局间消息包括第二 B SS的 B SC标识，还可以进一步包括本地交换已建立的指示。 The inter-office message sent by the sending module is a local call local exchange LCLS message or an INF information message; the inter-office message includes a B SC identifier of the second B SS, and may further include an indication that the local exchange has been established.

本实施例的移动交换中心，在进行会话的双方中的一方发生了跨 BSC切换而满足本地交换条件时，通过建立本地连接，使网关和基站子***释放相应的 A口承载，减少局间会话对 A接口和 Abis接口的占用。实施例四 In the mobile switching center of the embodiment, when one of the two parties performing the session crosses the BSC to meet the local exchange condition, the gateway and the base station subsystem release the corresponding A port bearer by establishing a local connection, thereby reducing the interoffice session. Occupancy of the A interface and the Abis interface. Embodiment 4

本实施例提供了一种移动交换中心，如图 7所示，包括接收模块 11 , 判断模块 22和指示模块 33。 This embodiment provides a mobile switching center. As shown in FIG. 7, the receiving module 11 includes a receiving module 11, a determining module 22, and an indicating module 33.

所述接收模块 11 , 用于接收对端移动交换中心 MSC发送的局间消息；所述判断模块 22 ,用于根据所述局间消息判断第二 BSS中的 BSC与第二移动终端所在的 BSC是否为同一 BSC，其中，所述第二 BSS为第一移动终端执行切换的目标 BSS; The receiving module 11 is configured to receive an inter-office message sent by the peer mobile switching center MSC; The determining module 22 is configured to determine, according to the inter-office message, whether the BSC in the second BSS and the BSC in which the second mobile terminal is located are the same BSC, where the second BSS performs the handover target for the first mobile terminal. BSS;

所述指示模块 33 , 用于当第二 BSS中的 BSC与第二移动终端所在的 BSC不同时，指示第二 BSS解除为第一移动终端和第二移动终端建立的本地交换，建立与第四移动终端相关的 A口承载。 The indication module 33 is configured to: when the BSC in the second BSS is different from the BSC where the second mobile terminal is located, instruct the second BSS to release the local exchange established for the first mobile terminal and the second mobile terminal, establishing and fourth The A port bearer associated with the mobile terminal.

所述接收模块 11接收的局间消息为本地呼叫本地交换 LCLS消息或 INF信息消息；所述局间消息包括第二 B SS的 B SC标识。 The interoffice message received by the receiving module 11 is a local call local exchange LCLS message or an INF information message; the interoffice message includes a B SC identifier of the second B SS.

本实施例的移动交换中心，在局间建立了本地连接的双方中的一方发生了跨 BSC切换时，通过解除本地连接，指示网关和基站子***建立相应的 A口承载，保证了建立本地交换、解除本地交换的连贯性。 In the mobile switching center of this embodiment, when one of the two parties that establish the local connection between the inter-offices performs the cross-BSC handover, the local connection is instructed, and the gateway and the base station subsystem are instructed to establish a corresponding A-port bearer, thereby ensuring the establishment of the local exchange. , to remove the consistency of local exchanges.

由于实施例二、实施例三、实施例四与实施例一相似的内容较多，因此描述的比较简略，相关之处请参见实施例一。 Since the second embodiment, the third embodiment, and the fourth embodiment are similar to the first embodiment, the description is relatively simple. For the related matter, refer to the first embodiment.

本领域普通技术人员可以理解实现上述实施例方法中的全部或部分步骤是可以通过程序来指令相关的硬件来完成，所述的程序可以存储于一计算机可读存储介质中，该程序在执行时，包括如下步骤：判断第二 BSS中的 BSC与第二移动终端所在的 BSC是否为同一 BSC, 其中，所述第二 BSS为第一移动终端执行切换的目标 BSS; 若是，则指示第二 BSS为第一移动终端和第二移动终端建立本地交换；释放与第一移动终端相关的 A口承载；向第二移动终端所在的第二移动交换中心 MSC发送局间消息，以使第二 MSC判断本地交换巳建立并指示第二网关和目标 BSS释放为第二移动终端建立的 A口承载。所述存储介质，如： OM / RAM, 磁碟、光盘等。 A person skilled in the art can understand that all or part of the steps of implementing the above embodiments can be completed by a program instructing related hardware, and the program can be stored in a computer readable storage medium. The method includes the following steps: determining whether the BSC in the second BSS and the BSC in which the second mobile terminal is located is the same BSC, where the second BSS is a target BSS for performing handover of the first mobile terminal; if yes, indicating the second BSS Establishing a local exchange for the first mobile terminal and the second mobile terminal; releasing an A-port bearer associated with the first mobile terminal; and transmitting an inter-office message to the second mobile switching center MSC where the second mobile terminal is located, so that the second MSC determines The local exchange establishes and instructs the second gateway and the target BSS to release the A-port bearer established for the second mobile terminal. The storage medium, such as: OM / RAM, disk, optical disk, and the like.

需要说明的是，在本文中，诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来，而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且，术语"包括"、 "包含"或者其任何其他变体意在涵盖非排他性的包含,从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下，由语句 "包括一个 ... ...，，限定的要素，并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。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。凡在本发明的精神和原则之内所作的任何修改、等同替换、改进等，均包含在本发明的保护范围内。 It should be noted that, in this context, relational terms such as first and second are used merely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply these entities or operations. There is any such actual relationship or order between them. Furthermore, the terms "comprising,""comprising," or "includes" or "includes" are intended to include a non-exclusive inclusion, such that a process, method, article, or device that includes a plurality of elements includes not only those elements but also Other elements, or elements that are inherent to such a process, method, item, or device. In the absence of further limitations, the phrase "comprising a singular element" does not exclude the presence of the same element in the process, method, item, or device. The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Any modifications, equivalents, improvements, etc. made within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims

权利要求书 Claim

1、一种局间建立本地交换的方法，其特征在于，包括： A method for establishing a local exchange between offices, characterized in that it comprises:

判断第二基站子*** BSS中的基站控制器 BSC与第二移动终端所在的 BSC是否为同一 BSC, 其中，所述第二 BSS为第一移动终端执行切换的目标 BSS; Determining whether the base station controller BSC in the second base station subsystem BSS and the BSC in which the second mobile terminal is located are the same BSC, wherein the second BSS is the target BSS for performing handover of the first mobile terminal;

若是，则指示第二 BSS为第一移动终端和第二移动终端建立本地交换；释放与第一移动终端相关的 A口承载； If yes, the second BSS is instructed to establish a local exchange between the first mobile terminal and the second mobile terminal; releasing the A port bearer associated with the first mobile terminal;

2、如权利要求 1所述的方法，其特征在于，所述局间消息为本地呼叫本地交换 LCLS消息或 INF信息消息。 2. The method of claim 1, wherein the interoffice message exchanges an LCLS message or an INF information message locally for a local call.

3、如权利要求 1或 2所述的方法，其特征在于，所述局间消息包括第二 BSS的 BSC标识。 3. The method according to claim 1 or 2, wherein the interoffice message comprises a BSC identity of the second BSS.

4、如权利要求 3所述的方法，其特征在于，所述第二 MSC判断本地交换已建立包括： The method of claim 3, wherein the determining, by the second MSC, that the local exchange has been established comprises:

第二 MSC根据接收的 BSC标识判断第一移动终端和第二移动终端所在的 BSC为同一个 BSC，向第二 BSS发送本地交换建立请求，根据接收到的第二 BSS发送的本地交换建立响应，确定第一移动终端和第二移动终端之间的本地交换已建立。 The second MSC determines, according to the received BSC identifier, that the BSC where the first mobile terminal and the second mobile terminal are located is the same BSC, sends a local exchange establishment request to the second BSS, and establishes a response according to the local exchange sent by the received second BSS. It is determined that a local exchange between the first mobile terminal and the second mobile terminal has been established.

5、如权利要求 3所述的方法，其特征在于，所述局间消息还包括本地交换已建立的指示。 5. The method of claim 3, wherein the interoffice message further comprises an indication that the local exchange has been established.

6、如权利要求 5所述的方法，其特征在于，所述第二 MSC判断本地交换已建立包括： The method according to claim 5, wherein the determining, by the second MSC, that the local exchange has been established comprises:

第二 MSC通过接收的所述本地交换已建立的指示，确定第一移动终端和第二移动终端之间的本地交换已建立。 The second MSC determines that the local exchange between the first mobile terminal and the second mobile terminal has been established by receiving the indication that the local exchange has been established.

7、一种局间解除本地交换的方法，其特征在于，包括：建立与第三移动终端相关的 A口承载； A method for canceling local exchange between offices, comprising: establishing an A port bearer associated with a third mobile terminal;

8、如权利要求 7所述的方法，其特征在于，所述局间消息为本地呼叫本地交换 LCLS消息或 INF信息消息。 8. The method according to claim 7, wherein the interoffice message exchanges an LCLS message or an INF information message locally for a local call.

9、如权利要求 7或 8所述的方法，其特征在于，所述局间消息包括第三 BSS的 BSC标识。 9. The method of claim 7 or 8, wherein the interoffice message comprises a BSC identity of a third BSS.

10、一种移动交换中心，其特征在于，包括： 10. A mobile switching center, comprising:

判断模块，用于判断第二基站子*** BSS中的基站控制器 BSC与第二移动终端所在的 BSC是否为同一 BSC,其中，所述第二 BSS为第一移动终端执行切换的目标 BSS; a determining module, configured to determine whether the base station controller BSC in the second base station subsystem BSS and the BSC in which the second mobile terminal is located are the same BSC, wherein the second BSS is a target BSS for performing handover of the first mobile terminal;

指示模块，用于当第二 BSS中的 BSC与第二移动终端所在的 BSC相同时，指示第二 BSS为第一移动终端和笫二移动终端建立本地交换； The indication module is configured to: when the BSC in the second BSS is the same as the BSC where the second mobile terminal is located, instruct the second BSS to establish a local exchange between the first mobile terminal and the second mobile terminal;

发送模块，用于向第二移动终端所在的对端移动交换中心 MSC发送局间消息，以使对端 MSC判断本地交换已建立并指示第二网关和目标 BSS释放为第二移动终端建立的 A口承载。 a sending module, configured to send an inter-office message to the peer mobile switching center MSC where the second mobile terminal is located, so that the peer MSC determines that the local exchange has been established and instructs the second gateway and the target BSS to release the established A for the second mobile terminal. Port bearer.

11、如权利要求 10所述的移动交换中心，其特征在于，所述发送模块发送的局间消息为本地呼叫本地交换 LCLS消息或 INF信息消息；所述局间消息包括第二 BSS的 BSC标识。 The mobile switching center according to claim 10, wherein the inter-office message sent by the sending module is a local call local exchange LCLS message or an INF information message; the inter-office message includes a BSC identifier of the second BSS. .

12、如权利要求 11所述的移动交换中心，其特征在于，所述局间消息还包括本地交换已建立的指示。 12. The mobile switching center of claim 11, wherein the interoffice message further comprises an indication that the local exchange has been established.

13、一种移动交换中心，其特征在于，包括：接收模块，用于接收对端移动交换中心 MSC发送的局间消息；判断模块，用于根据所述局间消息判断第二基站子*** BSS中的基站控制器 BSC与第二移动终端所在的 BSC是否为同一 BSC,其中，所述第二 BSS 为第一移动终端执行切换的目标 BSS; 13. A mobile switching center, comprising: a receiving module, configured to receive an inter-office message sent by the peer mobile switching center MSC, and a determining module, configured to determine, according to the inter-office message, a base station controller BSC in the second base station subsystem BSS and a BSC where the second mobile terminal is located Whether it is the same BSC, wherein the second BSS performs a handover target BSS for the first mobile terminal;

14、如权利要求 13所述的移动交换中心，其特征在于，所述接收模块接收的局间消息为本地呼叫本地交换 LCLS消息或 INF信息消息；所述局间消息包括第二 BSS的 BSC标识。 The mobile switching center according to claim 13, wherein the inter-office message received by the receiving module is a local call local exchange LCLS message or an INF information message; the inter-office message includes a BSC identifier of the second BSS. .