WO2010091634A1

WO2010091634A1 - Method, apparatus and system for establishing local switch

Info

Publication number: WO2010091634A1
Application number: PCT/CN2010/070597
Authority: WO
Inventors: 朱星
Original assignee: 华为技术有限公司
Priority date: 2009-02-11
Filing date: 2010-02-10
Publication date: 2010-08-19
Also published as: CN101801047B; CN101801047A

Abstract

A method, an apparatus and a system for establishing a local switch are disclosed in the embodiments of the present invention, wherein the method includes: if the conditions of establishing a local switch are satisfied, informing, by sending an assignment request message to a base station subsystem, the base station subsystem of resources assigned to the two calls which constitute a session, and querying whether the base station subsystem is able to switch locally; acquiring the information whether the base station subsystem is able to switch locally by receiving an assignment completion message returned by the base station subsystem; if the base station subsystem is able to switch locally, instructing the base station subsystem to switch locally. With the technical schemes of the embodiments in the present invention, the transmission resources of the interface A are saved.

Description

建立本地交换的方法、设备和*** 本申请要求于 2009年 2月 11日提交中国专利局、申请号为 200910105352.2、发明名称为 "建立本地交换的方法和核心网设备" 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, device and system for establishing local exchange This application claims priority to Chinese patent application filed on February 11, 2009, the Chinese Patent Office, the application number is 200910105352.2, and the invention is entitled "Method of Establishing Local Exchange and Core Network Equipment" The entire contents of which are incorporated herein by reference. Technical field

本发明涉及通信领域，尤其涉及一种建立本地交换的方法、设备和***。背景技术 The present invention relates to the field of communications, and in particular, to a method, device, and system for establishing a local exchange. Background technique

传输网络是无线通信网络的重要组成部分，目前很多国家和地区的运营商因为连接无线接入网及核心网的传输资源的瓶颈问题，影响了无线网络的部署、运营和业务的开展。在非洲等地区，无线网络的发展速度远高于有线网络的发展。在以欧洲为代表的地区，由于受到当地法律法规的限制，地面有线传输网络的建设无法按照运营商的需求进行建设。即使地面传输资源较为丰富的国家，如中国，也面对着对偏远地区、岛屿进行传输网络建设时的成本高昂，投资回报率低的问题。在上述场景中，运营商通常为釆用微波、卫星或租用地面传输线路的方法。因此，降低对传输网络带宽的占用，可以有效地降低网络建设和运营成本，而本地交换就是一种有效降低传输资源带宽的方法。如图 1所示，本地交换可以划分为基站收发信台（ Base Transceiver Station, BTS )内的本地交换和基站控制器（ Base Station Controller, BSC )内的本地交换。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和 A口传输资源的节省。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口传输资源的节省。 The transmission network is an important part of the wireless communication network. At present, operators in many countries and regions have affected the deployment, operation and service development of the wireless network because of the bottleneck problem of the transmission resources connecting the wireless access network and the core network. In regions such as Africa, wireless networks are growing much faster than wired networks. In areas represented by Europe, due to local laws and regulations, the construction of terrestrial cable transmission networks cannot be built according to the needs of operators. Even countries with rich terrestrial transmission resources, such as China, face the problem of high cost and low return on investment in the construction of transmission networks in remote areas and islands. In the above scenario, the operator usually uses microwave, satellite or leased terrestrial transmission lines. Therefore, reducing the occupation of the transmission network bandwidth can effectively reduce the network construction and operation costs, and local exchange is a method for effectively reducing the bandwidth of the transmission resources. As shown in Figure 1, the local exchange can be divided into local exchanges in the Base Transceiver Station (BTS) and local exchanges in the Base Station Controller (BSC). For local switching within the BTS, the two sides of the session are located in the same BTS, or in the same BTS cluster (in the case of BTS cascading), the loopback of the voice link occurs in the corresponding BTS. By establishing a local exchange within the BTS, savings in Abis and A-port transmission resources can be achieved. For local switching within the BSC, both parties are in the same BSC, but in different BTS (BTS clusters), the voice chain The loopback occurs in the corresponding BSC. By establishing a local exchange within the BSC, savings in the transmission resources of the A port can be achieved.

现有技术中是否建立本地交换由 BSC决定。 BSC通过判断构成会话的两个呼叫是否釆用相同的编解码，以及是否属于同一个 BTS (簇）或者 BSC, 进而决定是否建立本地交换。 Whether the local exchange is established in the prior art is determined by the BSC. The BSC decides whether to establish a local exchange by judging whether the two calls constituting the session use the same codec and whether they belong to the same BTS (cluster) or BSC.

在现有技术中因为 BSC 建立本地交换后并不通知移动交换中心（Mobile Switching Center, MSC ) ,所以 MSC对于两个呼叫是否已执行了本地交换并不知道。这样一来，就无法有效支持种类繁多的补充业务（例如呼叫等待，呼叫保持，多方通话，合法监听等等）。同时， BSC执行本地交换后， A接口相关资源并没有释放。在时分复用（ Time Division Multiplex, TDM )情况下，无法节省 A接口传输资源。发明内容 In the prior art, since the BSC does not notify the Mobile Switching Center (MSC) after establishing the local exchange, the MSC does not know whether the two calls have been locally exchanged. As a result, there is no way to effectively support a wide variety of supplementary services (such as call waiting, call hold, multi-party calls, lawful interception, etc.). At the same time, after the BSC performs local exchange, the resources related to the A interface are not released. In the case of Time Division Multiplex (TDM), the A interface transmission resources cannot be saved. Summary of the invention

本发明的实施例提供了一种建立本地交换的方法、设备和***，以节省 A 接口传输资源。 Embodiments of the present invention provide a method, device, and system for establishing a local exchange to save an A interface transmission resource.

一方面，本发明实施例提供了一种建立本地交换的方法，包括： In one aspect, an embodiment of the present invention provides a method for establishing a local exchange, including:

如果满足建立本地交换的条件，则通过向基站子***发送指派请求消息告知所述基站子***为构成会话的两个呼叫分配的资源以及询问所述基站子*** 是否能够进行本地交换； If the condition for establishing the local exchange is satisfied, the base station subsystem is informed of the resources allocated for the two calls constituting the session by sending an assignment request message to the base station subsystem and asking whether the base station subsystem can perform local exchange;

通过接收所述基站子***返回的指派完成消息获取所述基站子***是否能够进行本地交换的信息； Obtaining information about whether the base station subsystem can perform local exchange by receiving an assignment complete message returned by the base station subsystem;

如果所述基站子***能够进行本地交换，则指示所述基站子***进行本地交换。 If the base station subsystem is capable of local switching, the base station subsystem is instructed to perform local switching.

另一方面，本发明实施例还提供了一种核心网设备，包括：资源分配单元，用于如果满足建立本地交换的条件，则通过向接入网设备发送指派请求消息告知所述接入网设备为构成会话的两个呼叫分配的资源以及询问所述接入网设备是否能够进行本地交换； On the other hand, an embodiment of the present invention further provides a core network device, including: a resource allocation unit, configured to notify the access network device of resources allocated for two calls constituting a session and query the access network device by sending an assignment request message to the access network device if the condition for establishing the local exchange is satisfied Whether it is possible to perform local exchange;

信息获取单元，用于通过接收所述接入网设备返回的指派完成消息获取所述接入网设备是否能够进行本地交换的信息； An information acquiring unit, configured to acquire, by receiving an assignment completion message returned by the access network device, information about whether the access network device can perform local exchange;

本地交换处理单元，用于如果所述接入网设备能够进行本地交换，则指示所述接入网设备进行本地交换；如果所述接入网设备不能进行本地交换，则继续完成指派流程。 And a local switching processing unit, configured to: if the access network device is capable of local switching, instructing the access network device to perform local switching; if the access network device cannot perform local switching, continuing the assignment process.

另一方面，本发明实施例还提供了一种接入网设备，包括： On the other hand, an embodiment of the present invention further provides an access network device, including:

用于接收核心网设备发送的指派请求消息，根据所述指派请求信息为构成会话的呼叫分配资源的单元； And a unit for receiving an assignment request message sent by the core network device, and allocating resources for the call constituting the session according to the assignment request information;

用于通过发送指派完成消息，将是否能够执行本地交换的结果通知所述核心网设备的单元； Means for notifying the unit of the core network device of whether a local exchange can be performed by sending an assignment completion message;

用于接收所述核心网设备发送的本地交换命令，根据所述本地交换命令执行本地交换操作的单元。 And a unit for receiving a local exchange command sent by the core network device, and performing a local exchange operation according to the local exchange command.

再一方面，本发明实施例还提供了一种通信***，包括： In a further aspect, the embodiment of the invention further provides a communication system, including:

核心网设备，用于如果满足建立本地交换的条件，则通过向接入网设备发送指派请求消息告知所述接入网设备为构成会话的两个呼叫分配的资源以及询问所述接入网设备是否能够进行本地交换，通过接收所述接入网设备返回的指派完成消息获取所述接入网设备是否能够进行本地交换的信息，如果所述接入网设备能够进行本地交换，则指示所述接入网设备进行本地交换；如果所述接入网设备不能进行本地交换，则继续完成指派流程； a core network device, configured to notify the access network device of resources allocated for two calls constituting a session and query the access network device by sending an assignment request message to the access network device if a condition for establishing a local exchange is satisfied Whether it is possible to perform local exchange, and obtain information about whether the access network device can perform local exchange by receiving an assignment completion message returned by the access network device, and if the access network device is capable of local exchange, indicating The access network device performs local exchange; if the access network device cannot perform local exchange, the assignment process continues;

所述接入网设备，用于接收所述核心网设备发送的指派请求消息，根据所述指派请求信息为构成会话的呼叫分配资源，通过发送指派完成消息，将是否能够执行本地交换的结果通知所述核心网设备，接收所述核心网设备发送的本地交换命令，根据所述本地交换命令执行本地交换操作。 The access network device is configured to receive an assignment request message sent by the core network device, according to the The assignment request information is allocated to the call constituting the session, and the core network device is notified by the result of whether the local exchange can be performed by sending the assignment completion message, and the local exchange command sent by the core network device is received, according to the local exchange. The command performs a local swap operation.

本发明实施例提供的技术方案中，通过由核心网设备确定是否能够建立本地交换，并向接入网设备征询其是否具备建立本地交换的能力，从而建立本地交换的过程，可以有效的节省 A接口传输资源。附图说明 In the technical solution provided by the embodiment of the present invention, the core network device determines whether the local exchange can be established, and the access network device is consulted whether it has the capability of establishing a local exchange, thereby establishing a local exchange process, which can effectively save A. Interface transmission resources. DRAWINGS

图 1为现有技术中的本地交换示意图； 1 is a schematic diagram of local exchange in the prior art;

图 2为本发明实施例提供的建立本地交换的方法流程示意图一； 2 is a schematic flowchart 1 of a method for establishing a local exchange according to an embodiment of the present invention;

图 3为本发明实施例提供的建立本地交换的方法流程示意图二； 3 is a schematic flowchart 2 of a method for establishing a local exchange according to an embodiment of the present invention;

图 4为本发明实施例提供的核心网设备结构示意图一； 4 is a schematic structural diagram 1 of a core network device according to an embodiment of the present invention;

图 5为本发明实施例提供的核心网设备结构示意图二。 FIG. 5 is a schematic structural diagram 2 of a core network device according to an embodiment of the present invention.

具体实施方式 detailed description

本发明实施例提供了一种在指派过程中，由核心网，例如 MSC判断是否能够建立本地交换，并向接入网设备，例如基站子*** (Base Station Subsystem, BSS) 征询该基站子***是否具备建立本地交换的能力的建立本地交换的技术方案，从而有效的节省 A接口传输资源。 An embodiment of the present invention provides a method for determining, by a core network, for example, an MSC, whether a local exchange can be established in an assignment process, and whether the base station subsystem is queried by an access network device, such as a base station subsystem (BSS). It has the technical solution of establishing local exchange to establish the capability of local exchange, thereby effectively saving the transmission resources of the A interface.

下面结合附图，对本发明实施例做进一步详细的描述。 The embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

如图 2所示，本发明实施例提供了一种建立本地交换的方法，具体包括：步骤 201 , 如果满足建立本地交换的条件，则通过向基站子***发送指派请求消息告知所述基站子***为构成会话的两个呼叫分配的资源以及询问所述基站子***是否能够进行本地交换，所述构成会话的两个呼叫，一个是被叫，一个是主叫； As shown in FIG. 2, the embodiment of the present invention provides a method for establishing a local exchange, which specifically includes: Step 201: If the condition for establishing a local exchange is met, the base station subsystem is notified by sending an assignment request message to a base station subsystem. The resources allocated for the two calls constituting the session and the query whether the base station subsystem is capable of local exchange, the two calls constituting the session, one is called, one Is the caller;

步骤 202,通过接收所述基站子***返回的指派完成消息获取所述基站子系统是否能够进行本地交换的信息； Step 202: Obtain information about whether the base station subsystem can perform local exchange by receiving an assignment complete message returned by the base station subsystem.

步骤 203 , 根据所述获取的信息，如果所述基站子***能够进行本地交换，则指示所述基站子***进行本地交换。 Step 203: Instruct the base station subsystem to perform local exchange according to the acquired information, if the base station subsystem is capable of local switching.

本发明实施例提供的建立本地交换的方法，能够由核心网，例如， MSC判断是否能够建立本地交换，并向基站子***征询该基站子***是否具备建立本地交换的能力，从而更好的支持补充业务，例如呼叫等待、呼叫保持、多方通话和合法监听等等；并可以在建立本地交换后释放 A接口相关资源，有效的节省 A接口传输资源。 The method for establishing a local exchange provided by the embodiment of the present invention can be determined by the core network, for example, the MSC, whether the local exchange can be established, and the base station subsystem is queried whether the base station subsystem has the capability of establishing a local exchange, thereby better supporting. Supplementary services, such as call waiting, call hold, multi-party call and lawful interception, etc.; and can release A-interface related resources after establishing local exchange, effectively saving A interface transmission resources.

可选的，如果所述基站子***不能进行本地交换，则继续完成当前的指派流程。 Optionally, if the base station subsystem cannot perform local exchange, the current assignment process is continued.

可选的，在步骤 201 向所述基站子***发送指派请求消息之前，所述方法可以进一步包括：接收所述基站子***在呼叫建立过程中上报的层三信息，根据所述层三信息确定是否满足建立本地交换的条件。 Optionally, before the sending the assignment request message to the base station subsystem in step 201, the method may further include: receiving layer 3 information reported by the base station subsystem during the call setup process, and determining, according to the layer 3 information Whether the conditions for establishing a local exchange are met.

MSC可以确定出哪些呼叫可以建立本地交换。例如， MSC可以通过记录构成会话的两个呼叫所在小区的小区标识（Cell-ID ), 结合两个呼叫所使用的编解码及当前对补充业务的要求，确定是否允许所述会话的两个呼叫建立本地交换。例如， MSC可以根据如下几个方面判断某两个呼叫是否可以建立本地交换： The MSC can determine which calls can establish a local exchange. For example, the MSC can determine whether to allow two calls of the session by recording the cell identity (Cell-ID) of the cell in which the two calls constituting the session are located, combining the codec used by the two calls and the current request for supplementary services. Establish a local exchange. For example, the MSC can determine whether a two call can establish a local exchange according to the following aspects:

1 )建立本地交换的两个呼叫是否位于同一个 BSS; 1) Establish whether two calls exchanged locally are located in the same BSS;

2 )建立本地交换的两个呼叫的编解码是否相同或兼容，或者两个呼叫的码变换器（TC ) 资源位于 BSC上； 2) Whether the codec of the two calls that are locally exchanged is the same or compatible, or the code converter (TC) resources of the two calls are located on the BSC;

3 )对于补充业务，业务的属性不能与本地交换冲突，例如，对于呼叫等待、呼叫保持、多方通话等补充业务的属性与本地交换冲突，无法进行本地交换。对于同一 MSC下的每个呼叫 ,可以釆用某种标识手段，对其进行唯一标识。例如，可以釆用呼叫标识（Call-ID )的信元进行标识。除了 Call-ID夕卜，还可以釆用其他方式，本申请文件所举方式并不对其构成限制。 3) For supplementary services, the attributes of the service cannot conflict with the local exchange, for example, for call waiting, The attributes of the supplementary service such as call hold and multi-party call conflict with the local exchange, and local exchange cannot be performed. For each call under the same MSC, it can be uniquely identified by some means of identification. For example, the cell of the call identifier (Call-ID) can be used for identification. In addition to Call-ID, other methods may be used, and the manner in which this document is filed does not limit it.

可选的，可以在接收到构成会话的被叫发送的连接消息之后，指示所述基站子***进行本地交换。通过将本地交换流程设置在 MSC收到被叫的连接消息之后，可以避免因为引入本地交换后造成的语音帧丟失而影响语音质量。 Optionally, the base station subsystem may be instructed to perform local exchange after receiving the connection message sent by the called party constituting the session. By setting the local exchange procedure after the MSC receives the connected connection message, it can avoid the voice quality loss caused by the loss of the voice frame caused by the introduction of the local exchange.

所述步骤 201 中告知基站子***为所属呼叫分配的资源可以包括：为所述本地交换分配的资源，或者，为所述本地交换分配的资源和为所述呼叫分配的核心网用户面资源。 The resource allocated by the base station subsystem to the associated call in the step 201 may include: a resource allocated for the local exchange, or a resource allocated for the local exchange and a core network user plane resource allocated for the call.

可选的，所述指派请求消息、指派完成消息或指示所述基站子***进行本地交换的本地交换命令消息可以在所述构成会话的主叫或者被叫的信令连接控制协议 SCCP连接上传输。 MSC通过在一个呼叫的 SCCP连接上下发指派消息，例如指派请求消息，避免了在主被叫上均下发指派消息，从而可以减少 A接口信令消息，缩短呼叫建立的时长。 Optionally, the assignment request message, the assignment completion message, or the local exchange command message indicating that the base station subsystem performs local exchange may be transmitted on the signaling connection control protocol SCCP connection of the calling or called party that constitutes the session. . The MSC sends and receives an assignment message, such as an assignment request message, on the SCCP connection of a call, so that the assignment message is sent on both the primary and the called, thereby reducing the A-interface signaling message and shortening the duration of the call setup.

如图 3 所示，本发明实施例还提供了一种建立本地交换的方法，本实施例中^^定移动终端 1 ( MS1 )为主叫，移动终端 2 ( MS2 )为被叫，该方法具体包括： As shown in FIG. 3, the embodiment of the present invention further provides a method for establishing a local exchange. In this embodiment, the mobile terminal 1 (MS1) is called as the calling party, and the mobile terminal 2 (MS2) is called. Specifically include:

5301, 基站子*** BSS 向 MSC 发送与主叫相关的完全层三消息 ( COMPLETE LAYER 3 MESSAGE ), 所述层三消息中包含有与主叫相关的层三信息。 5301. The base station subsystem BSS sends a full layer three message (COMPLETE LAYER 3 MESSAGE) related to the calling party to the MSC, where the layer three message includes layer three information related to the calling party.

5302, MS1通过所述 BSS向 MSC发送呼叫建立消息 (SETUP)。 5302. The MS1 sends a call setup message (SETUP) to the MSC through the BSS.

5303, BSS向 MSC发送与被叫相关的完全层三消息，所述层三消息中包含有与被叫相关的层三信息； S303: The BSS sends a complete layer three message related to the called party to the MSC, where the layer three message includes There are layer three information related to the called party;

根据 BSS上报的主被叫相关的层三信息， MSC可以确定构成上述会话的两个呼叫是否满足建立本地交换的条件，具体确定过程与前述实施例描述的确定过程相似，此处不再赘述。 The MSC can determine whether the two calls constituting the session meet the conditions for establishing the local exchange according to the layer 3 information related to the primary and the called party reported by the BSS. The specific determination process is similar to the determination process described in the foregoing embodiment, and details are not described herein again.

S304, MSC收到 MS2在完成了对所有兼容设备通话能力的测试后上的呼叫证实消息（ CALL CONFIRMED ),通知 MSC已经收到了所有建立通话连接所需要的消息。 S304: The MSC receives a call confirmation message (CALL CONFIRMED) after the MS2 completes the test of the call capability of all compatible devices, and notifies the MSC that all the messages required for establishing the call connection have been received.

5305, 如果 MSC确定所述两个呼叫满足建立本地交换的条件，则通过主叫或者被叫的信令连接控制协议 SCCP连接下发本地交换指派请求（ LS S305. If the MSC determines that the two calls meet the condition for establishing a local exchange, the local exchange assignment request is sent by the calling or called signaling connection control protocol (SCCP).

ASSIGNMENT REQUEST ) 消息，通过所述消息告知 BSS为所述两个呼叫分配的资源，以及询问所述 BSS是否能够执行本地交换。所述分配的资源可以是为执行本地交换分配的资源，或者，也可以是为执行本地交换分配的资源以及为所述呼叫分配的核心网用户面资源，以备未能执行本地交换时，所述呼叫可以导入核心网。本实施例通过由 MSC判断是否能够建立本地交换，并向 BSS征询其是否具备建立本地交换的能力，可以更好的支持补充业务，例如呼叫等待、呼叫保持、多方通话和合法监听等等；并可以有效的节省 A接口传输资源。 MSC 通过在一个呼叫的 SCCP连接上下发指派消息，避免了在主被叫上均下发指派消息，从而可以减少 A接口信令消息，缩短呼叫建立的时长。 An ASSIGNMENT REQUEST message, by which the BSS is informed of the resources allocated for the two calls, and whether the BSS is capable of performing a local exchange. The allocated resource may be a resource allocated for performing local exchange, or may be a resource allocated for performing local exchange and a core network user plane resource allocated for the call, in case the local exchange cannot be performed, The call can be imported into the core network. In this embodiment, by determining whether the local exchange can be established by the MSC and asking the BSS whether it has the ability to establish a local exchange, the supplementary service, such as call waiting, call hold, multi-party call, and lawful interception, can be better supported; It can effectively save the A interface transmission resources. By sending an assignment message on the SCCP connection of a call, the MSC avoids sending an assignment message on both the primary and the called, thereby reducing the A-interface signaling message and shortening the duration of the call setup.

5306, BSS 收到所述本地交换指派请求消息后，根据所述本地交换指派请求消息的指示为所述呼叫分配所需的资源，发送本地交换指派完成（LS After receiving the local exchange assignment request message, the BSS allocates the required resources to the call according to the indication of the local exchange assignment request message, and sends the local exchange assignment complete (LS).

ASSIGNMENT COMPLETE ) 消息给 MSC通知其资源分配完成，同时将自己是否能够执行本地交换的结果通过本地交换指派完成（LS ASSIGNMENT COMPLETE ) 消息发送给 MSC。所述 BSS是否能够执行本地交换的结果信息可以携带在本地交换指派完成消息的本地交换判断（ LOCAL SWITCH JUDGMENT )信元中，当然，也可以携带在其它信元中，本发明实施例并不对此进行限定。所述本地交换指派完成消息也可以只在主叫或者被叫的 SCCP连接上发送，相比于在主被叫的 SCCP连接上都发送，可以节约一半的消息量，从而可以减少 A接口信令消息，缩短呼叫建立的时长。 The ASSIGNMENT COMPLETE message informs the MSC that its resource allocation is complete, and sends the LS ASSIGNMENT COMPLETE message to the MSC whether it can perform the local exchange. Whether the BSS can perform the result information of the local exchange It can be carried in the local exchange judgment (LOCAL SWITCH JUDGMENT) cell of the local exchange assignment completion message. Of course, it can also be carried in other cells, which is not limited in the embodiment of the present invention. The local exchange assignment complete message may also be sent only on the SCCP connection of the calling or called party, and may be saved by half of the message sent on the SCCP connection of the calling party, thereby reducing the A interface signaling. Message, shorten the length of call setup.

5307, MS2向 MSC发送提醒消息（ ALERTING )。 5307, MS2 sends an alert message (ALERTING) to the MSC.

5308, MSC向 MSI发送提醒消息（ ALERTING )。 5308, the MSC sends an alert message (ALERTING) to the MSI.

5309, MSC收到 MS2发送的连接消息（ CONNECT )，开始呼叫计费。 5309. The MSC receives the connection message (CONNECT) sent by the MS2, and starts the call charging.

5310, 如果根据接收到的本地交换指派完成消息确定 BSS 能够执行本地交换时，则向 BSS发送本地交换命令（LOCAL SWITCH COMMAND ) 消息，指示 BSS执行本地交换相关操作；如果根据接收到的本地交换指派完成消息确定 BSS 不能执行本地交换时，则后续操作按照现有的指派流程进行。所述本地交换命令消息也可以只在主叫或者被叫的 SCCP连接上发送，相比于在主被叫的 SCCP连接上都发送，可以节约一半的消息量，从而可以减少 A接口信令消息，缩短呼叫建立的时长。 5310. If it is determined according to the received local exchange assignment complete message that the BSS is capable of performing a local exchange, send a LOCAL SWITCH COMMAND message to the BSS, instructing the BSS to perform a local exchange related operation; if according to the received local exchange assignment When the completion message determines that the BSS cannot perform the local exchange, the subsequent operations are performed according to the existing assignment process. The local exchange command message may also be sent only on the SCCP connection of the calling or called party, and may be saved by half of the message sent on the SCCP connection of the calling party, thereby reducing the A interface signaling message. , shorten the length of call setup.

5311, BSS根据所述本地交换命令执行本地交换相关操作，如果执行成功，则向 MSC发出本地交换完成（ LOCAL SWITCH COMPLETE ) 消息，通知本地交换建立完成。如果无法建立本地交换，则可以向 MSC 发送本地交换失败 5311. The BSS performs a local exchange related operation according to the local exchange command. If the execution succeeds, the local exchange completion (LOCAL SWITCH COMPLETE) message is sent to the MSC to notify the local exchange establishment. If the local exchange cannot be established, the local exchange failure can be sent to the MSC.

( LOCAL SWITCH FAILURE )消息，通知 MSC本地交换建立失败， MSC则保留为所述两个呼叫分配的核心网用户面资源，以执行后续的呼叫建立步骤。所述本地交换完成消息或者本地交换失败消息也可以只在主叫或者被叫的 SCCP 连接上发送，相比于在主被叫的 SCCP连接上都发送，可以节约一半的消息量，从而可以减少 A接口信令消息，缩短呼叫建立的时长。 S312, MSC收到所述本地交换完成消息后，则向 MS1发送连接 ( CONNECT ) 消息，指示已经通过网络建立连接。上述本地交换建立流程，通过设置在 MSC收到 MS2的 CONNECT消息之后， MSC给 MS1下发 CONNECT 消息之前，从而可以避免因为引入本地交换后造成的语音帧丟失，影响语音质量。当然，这仅是本发明的一个优选实施例，本发明实施例并不意图限定上述本地交换流程的具***置。 The (LOCAL SWITCH FAILURE) message informs the MSC that the local exchange establishment fails, and the MSC reserves the core network user plane resources allocated for the two calls to perform the subsequent call setup procedure. The local exchange completion message or the local exchange failure message may also be sent only on the SCCP connection of the calling or called party, and may be saved by half of the message sent on the SCCP connection of the calling party, thereby reducing the amount of messages. A-interface signaling message, shortening the duration of call setup. S312. After receiving the local exchange complete message, the MSC sends a connection (CONNECT) message to the MS1, indicating that the connection has been established through the network. The local exchange establishment process is performed by setting the CONNECT message of the MS2 to the MSC before the MSC sends the CONNECT message to the MS1, so as to avoid the loss of the voice frame caused by the introduction of the local exchange and affect the voice quality. Of course, this is only a preferred embodiment of the present invention, and the embodiment of the present invention is not intended to limit the specific location of the above-mentioned local exchange procedure.

5313, MS1向所述 MSC发送连接证实（CONNECT ACK ) 消息。 5313. The MS1 sends a connection confirmation (CONNECT ACK) message to the MSC.

5314, MSC清除为所述两个呼叫分配的核心网用户面资源，向 MS2发送连接证实（ CONNECT ACK ) 消息。 5314. The MSC clears the core network user plane resource allocated for the two calls, and sends a connection confirmation (CONNECT ACK) message to the MS2.

本领域的技术人员可以了解，上述流程仅是例举性的，上述流程中的部分消息可以是可选的，本发明实施例也不意图限定上述流程中各消息的先后顺序。上述流程中的部分消息的具体功能与结构可以参考相关协议，此处不再赘述。 A person skilled in the art may understand that the foregoing process is only exemplary. Some of the messages in the foregoing process may be optional. The embodiments of the present invention are not intended to limit the sequence of messages in the foregoing process. For the specific functions and structures of some of the messages in the above process, refer to related protocols, and details are not described herein.

如图 4所示，本发明实施例还提供了一种核心网设备，具体包括：资源分配单元 410, 用于如果满足建立本地交换的条件，则通过向接入网设备发送指派请求消息告知所述接入网设备为构成会话的两个呼叫分配的资源以及询问所述接入网设备是否能够进行本地交换； As shown in FIG. 4, an embodiment of the present invention further provides a core network device, which specifically includes: a resource allocation unit 410, configured to notify an office by sending an assignment request message to an access network device if a condition for establishing a local exchange is satisfied. Determining, by the access network device, resources allocated for two calls constituting a session and inquiring whether the access network device is capable of local exchange;

信息获取单元 420,用于通过接收所述接入网设备返回的指派完成消息获取所述接入网设备是否能够进行本地交换的信息； The information obtaining unit 420 is configured to obtain, by receiving an assignment completion message returned by the access network device, information about whether the access network device can perform local exchange;

本地交换处理单元 430, 用于如果所述接入网设备能够进行本地交换，则指示所述接入网设备进行本地交换；如果所述接入网设备不能进行本地交换，则继续完成指派流程。 The local switching processing unit 430 is configured to: if the access network device is capable of local switching, instruct the access network device to perform local switching; if the access network device cannot perform local switching, continue to complete the assignment process.

如图 5所示，本发明实施例还提供了一种核心网设备，具体包括：资源分配单元 410, 用于如果满足建立本地交换的条件，则通过向接入网设备发送指派请求消息告知所述接入网设备为构成会话的两个呼叫分配的资源以及询问所述接入网设备是否能够进行本地交换； As shown in FIG. 5, the embodiment of the present invention further provides a core network device, which specifically includes: a resource allocation unit 410, configured to set to an access network if a condition for establishing a local exchange is satisfied The standby send assignment request message informs the access network device of the resources allocated for the two calls constituting the session and queries whether the access network device can perform local exchange;

其中，所述本地交换处理单元 430可以包括： The local exchange processing unit 430 can include:

指示模块 4301 , 用于如果所述接入网设备能够进行本地交换，则在接收到被叫的连接消息之后，指示所述接入网设备进行本地交换； The indicating module 4301 is configured to: after the access network device is capable of performing local exchange, instructing the access network device to perform local exchange after receiving the connected connection message;

指派模块 4302 , 用于如果所述接入网设备不能进行本地交换，则继续完成指派流程。 The assignment module 4302 is configured to continue the assignment process if the access network device is unable to perform local exchange.

可选的，所述核心网设备还可以包括： Optionally, the core network device may further include:

确定单元 440,用于在所述资源分配单元 410向接入网设备发送指派请求消息之前，接收所述接入网设备在呼叫建立过程中上报的层三信息，根据所述层三信息确定是否满足建立本地交换的条件。具体确定过程与前述实施例描述的确定过程相似，此处不再赘述。 The determining unit 440 is configured to: before the resource allocation unit 410 sends the assignment request message to the access network device, receive the layer 3 information reported by the access network device during the call setup process, and determine whether the layer 3 information is used according to the layer 3 information. Meet the conditions for establishing a local exchange. The specific determination process is similar to the determination process described in the foregoing embodiment, and details are not described herein again.

其中所述资源分配单元告知接入网设备为构成会话的两个呼叫分配的资源包括：为所述本地交换分配的资源，或者，为所述本地交换分配的资源和为所述呼叫分配的核心网用户面资源。所述指派请求消息、指派完成消息或指示所述接入网设备进行本地交换的本地交换命令消息可以在所述主叫或者被叫的 SCCP连接上传输。 The resource allocation unit instructing the access network device to allocate resources for the two calls constituting the session includes: resources allocated for the local exchange, or resources allocated for the local exchange and a core allocated for the call Network user resources. The assignment request message, the assignment completion message, or a local exchange command message indicating that the access network device performs local exchange may be transmitted on the calling or called SCCP connection.

其中，所述核心网设备，例如，可以是 MSC; 所述接入网设备，例如，可以是基站子***。 The core network device, for example, may be an MSC; the access network device, for example, So is the base station subsystem.

应用本发明实施例提供的核心网设备执行建立本地交换的具体过程与本发明方法实施例基本相似，此处不再赘述。 The specific process of the method for performing the local exchange performed by the core network device provided by the embodiment of the present invention is substantially similar to the embodiment of the method of the present invention, and details are not described herein again.

本发明实施例提供的核心网设备，可以在指派过程中由核心网设备判断是否能够建立本地交换，并向接入网设备征询其是否具备建立本地交换的能力，从而可以更好的支持补充业务，例如呼叫等待、呼叫保持、多方通话和合法监听等等；并有效的节省 A接口传输资源；进一步的，通过将本地交换流程设置在核心网设备收到被叫发送的连接消息之后，可以避免因为引入本地交换后造成的语音帧丟失而影响语音质量；进一步的，通过在一个呼叫的 SCCP连接上下发消息，例如指派请求消息、指派完成消息或本地切换命令消息等等，避免了在主被叫的 SCCP连接上均下发消息，从而可以减少 A接口信令消息，缩短呼叫建立的时长。 The core network device provided by the embodiment of the present invention can determine whether the local exchange can be established in the process of the assignment, and ask the access network device whether it has the capability of establishing a local exchange, so as to better support the supplementary service. For example, call waiting, call hold, multi-party call and lawful interception, etc.; and effectively save the A interface transmission resources; further, by setting the local exchange process after the core network device receives the connection message sent by the called party, it can be avoided The voice quality is affected by the loss of the voice frame caused by the introduction of the local exchange; further, by sending a message on the SCCP connection of a call, such as an assignment request message, an assignment completion message, or a local handover command message, etc., Messages are sent on the SCCP connection, which can reduce the A-interface signaling message and shorten the duration of call setup.

本发明实施例还提供了一种接入网设备，包括： An embodiment of the present invention further provides an access network device, including:

可选的，所述接入网设备还可以包括用于在接收所述核心网设备发送的指派请求消息之前，向所述核心网设备上报层三信息，所述层三信息用于由所述核心网设备确定所述呼叫是否满足建立本地交换的条件的单元。 Optionally, the access network device may further include, after receiving the assignment request message sent by the core network device, reporting layer 3 information to the core network device, where the layer 3 information is used by the The core network device determines whether the call satisfies a unit that establishes a condition for local exchange.

所述接入网设备，例如，可以是基站子***；所述核心网设备，例如，可以是 MSC。 The access network device, for example, may be a base station subsystem; the core network device, for example, So MSC.

应用本发明实施例提供的接入网设备执行建立本地交换的具体过程与本发明方法实施例基本相似，此处不再赘述。 The specific process of the method for performing the local exchange performed by the access network device provided by the embodiment of the present invention is substantially similar to the embodiment of the method of the present invention, and details are not described herein again.

本发明实施例提供的接入网设备，可以在指派过程中通知核心网所述接入网设备是否具备建立本地交换的能力，从而可以更好的支持补充业务，例如呼叫等待、呼叫保持、多方通话和合法监听等等；进一步的，通过接收所述核心网在收到构成所述会话的被叫的连接消息之后发送的本地交换命令，可以避免因为引入本地交换后造成的语音帧丟失而影响语音质量；进一步的，通过在一个呼叫的 SCCP连接上下发消息，例如指派完成消息，避免了在主被叫的 SCCP 连接上均下发指派完成消息，从而可以减少 A接口信令消息，缩短呼叫建立的时长。 The access network device provided by the embodiment of the present invention can notify the core network whether the access network device has the capability of establishing a local exchange during the assignment process, so as to better support supplementary services, such as call waiting, call hold, and multiple parties. Calling, lawful interception, etc.; further, by receiving the local exchange command sent by the core network after receiving the connected connection message constituting the session, the loss of the voice frame caused by the introduction of the local exchange may be avoided. Voice quality; further, by sending a message on the SCCP connection of a call, for example, assigning a completion message, the assignment completion message is avoided on the SCCP connection of the calling party, thereby reducing the A interface signaling message and shortening the call. The length of time established.

本发明实施例还提供了一种通信***，包括： The embodiment of the invention further provides a communication system, including:

核心网设备，例如 MSC, 用于如果满足建立本地交换的条件，则通过向接入网设备，例如基站子***，发送指派请求消息告知所述接入网设备为构成会话的两个呼叫分配的资源以及询问所述接入网设备是否能够进行本地交换，通过接收所述接入网设备返回的指派完成消息获取所述接入网设备是否能够进行本地交换的信息，如果所述接入网设备能够进行本地交换，则指示所述接入网设备进行本地交换；如果所述接入网设备不能进行本地交换，则继续完成指派流程； The core network device, for example, the MSC, is configured to notify the access network device of the two calls constituting the session by sending an assignment request message to the access network device, such as the base station subsystem, if the condition for establishing the local exchange is satisfied. And the information about whether the access network device can perform local exchange, and obtains information about whether the access network device can perform local exchange by receiving an assignment complete message returned by the access network device, if the access network device The local exchange can be performed, and the access network device is instructed to perform local exchange; if the access network device cannot perform local exchange, the assignment process is continued;

所述接入网设备，用于接收所述核心网设备发送的指派请求消息，根据所述指派请求信息为构成会话的呼叫分配资源，通过发送指派完成消息，将是否能够执行本地交换的结果通知所述核心网设备，接收所述核心网设备发送的本地交换命令，根据所述本地交换命令执行本地交换操作。其中，所述核心网设备与前述核心网设备实施例相似，所述接入网设备与前述接入网设备实施例相似，此处不再赘述。 The access network device is configured to receive an assignment request message sent by the core network device, allocate a resource for a call constituting a session according to the assignment request information, and notify a result of whether the local exchange can be performed by sending an assignment completion message The core network device receives a local exchange command sent by the core network device, and performs a local exchange operation according to the local exchange command. The core network device is similar to the foregoing core network device embodiment, and the access network device is similar to the foregoing access network device embodiment, and details are not described herein again.

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完成，所述的程序可以存储于一计算机可读存储介质中，如 ROM/RAM、磁碟或光盘等。 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 to instruct related hardware, and the program can be stored in a computer readable storage medium, such as ROM/RAM, magnetic. Disc or CD.

以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应所述以权利要求的保护范围为准。 The above is only the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the claims.

Claims

权利要求 Rights request

1、一种建立本地交换的方法，其特征在于，包括： A method for establishing a local exchange, comprising:

接收所述基站子***返回的指派完成消息，并获取所述基站子***是否能够进行本地交换的信息； Receiving an assignment completion message returned by the base station subsystem, and acquiring information about whether the base station subsystem can perform local exchange;

2、如权利要求 1所述的方法，其特征在于， 2. The method of claim 1 wherein:

如果所述基站子***不能进行本地交换，则继续完成指派流程。 If the base station subsystem is unable to perform local exchange, the assignment process continues.

3、如权利要求 1所述的方法，其特征在于，向所述基站子***发送指派请求消息之前，所述方法进一步包括： 3. The method of claim 1, wherein before the sending the request request message to the base station subsystem, the method further comprises:

接收所述基站子***在呼叫建立过程中上报的层三信息，根据所述层三信息确定是否满足建立本地交换的条件。 And receiving layer 3 information reported by the base station subsystem during the call setup process, and determining, according to the layer 3 information, whether a condition for establishing a local exchange is met.

4、如权利要求 1或所述的方法，其特征在于，所述指示所述基站子***进行本地交换之前，所述方法还包括： The method of claim 1 or 2, wherein, before the indicating that the base station subsystem performs local exchange, the method further includes:

接收所述构成会话的被叫的连接消息。 The connected connection message constituting the session is received.

5、如权利要求 1至 4中任意一项所述的方法，其特征在于，所述告知基站子***为构成会话的两个呼叫分配的资源包括：为所述本地交换分配的资源，或者，为所述本地交换分配的资源和为所述呼叫分配的核心网用户面资源。 The method according to any one of claims 1 to 4, wherein the resource allocated by the base station subsystem to the two calls constituting the session comprises: resources allocated for the local exchange, or Resources allocated for the local exchange and core network user plane resources allocated for the call.

6、如权利要求 1至 4中任意一项所述的方法，其特征在于，所述指派请求消息、指派完成消息或指示所述基站子***进行本地交换的本地交换命令消息在所述构成会话的主叫或者被叫的信令连接控制协议 SCCP连接上传输。 The method according to any one of claims 1 to 4, wherein the assignment request message, the assignment completion message or a local exchange command message indicating that the base station subsystem performs local exchange Transmitted on the SCCP connection of the calling or called signaling connection control protocol constituting the session.

7、一种核心网设备，其特征在于，包括： 7. A core network device, characterized in that:

资源分配单元，用于如果满足建立本地交换的条件，则通过向接入网设备发送指派请求消息告知所述接入网设备为构成会话的两个呼叫分配的资源以及询问所述接入网设备是否能够进行本地交换； a resource allocation unit, configured to notify the access network device of resources allocated for two calls constituting a session and query the access network device by sending an assignment request message to the access network device if the condition for establishing the local exchange is satisfied Whether it is possible to perform local exchange;

8、如权利要求 7所述的核心网设备，其特征在于，所述设备还包括：确定单元，用于在所述资源分配单元向接入网设备发送指派请求消息之前，接收所述接入网设备在呼叫建立过程中上报的层三信息，根据所述层三信息确定是否满足建立本地交换的条件。 The core network device according to claim 7, wherein the device further comprises: a determining unit, configured to receive the access before the resource allocation unit sends an assignment request message to the access network device The layer 3 information reported by the network device during the call setup process determines whether the condition for establishing the local exchange is satisfied according to the layer 3 information.

9、如权利要求 7所述的核心网设备，其特征在于，所述本地交换处理单元包括： The core network device according to claim 7, wherein the local exchange processing unit comprises:

指示模块，用于如果所述接入网设备能够进行本地交换，则在接收到被叫的连接消息之后，指示所述接入网设备进行本地交换； The indication module is configured to: after the access network device is capable of performing local exchange, instructing the access network device to perform local exchange after receiving the connected connection message;

指派模块，用于如果所述接入网设备不能进行本地交换，则继续完成指派流程。 An assignment module is configured to continue the assignment process if the access network device is unable to perform local exchange.

10、如权利要求 7至 9中任意一项所述的核心网设备，其特征在于，所述资源分配单元告知接入网设备为构成会话的两个呼叫分配的资源包括：为所述本地交换分配的资源，或者，为所述本地交换分配的资源和为所述呼叫分配的核心网用户面资源。 The core network device according to any one of claims 7 to 9, wherein the resource allocating unit instructs the access network device to allocate resources for two calls constituting the session, including: for the local exchange Allocated resources, or resources allocated for the local exchange and allocated for the call Core network user area resources.

11、一种接入网设备，其特征在于，包括： An access network device, comprising:

用于接收核心网设备发送的指派请求消息，根据所述指派请求信息为构成会话的呼叫分配资源的单元；用于通过发送指派完成消息，将是否能够执行本地交换的结果通知所述核心网设备的单元；用于接收所述核心网设备发送的本地交换命令，根据所述本地交换命令执行本地交换操作的单元。 And a unit for receiving an assignment request message sent by the core network device, and allocating a resource for a call constituting the session according to the assignment request information; and configured to notify the core network device of whether a local exchange can be performed by sending an assignment completion message The unit is configured to receive a local exchange command sent by the core network device, and perform a local exchange operation according to the local exchange command.

12、如权利要求 11所述的接入网设备，其特征在于，还包括：用于在接收所述核心网设备发送的指派请求消息之前，向所述核心网设备上报层三信息，所述层三信息用于由所述核心网设备确定所述呼叫是否满足建立本地交换的条件的单元。 The access network device according to claim 11, further comprising: reporting, to the core network device, layer three information, before receiving the assignment request message sent by the core network device, The layer three information is used by the core network device to determine whether the call satisfies a condition for establishing a condition of local exchange.

13、一种通信***，其特征在于，包括如权利要求 7至 10中任一项所述的核心网设备与如权利要求 11至 12中任一项所述的接入网设备。 A communication system, comprising: the core network device according to any one of claims 7 to 10, and the access network device according to any one of claims 11 to 12.