CN1633187B - Communication system based on private branch exchange and method for realizing communication - Google Patents

Abstract

This invention discloses a system for realizing mobile virtual private network service including a fixed switch network, a mobile switch network, also a small user switch of PBX extension connected with the gate mobile switch center of the mobile switch network, a route information providing unit providing panning numbers, the corresponding relation of PBX mobile number and said panning number to PBX, or providing mobile numbers to PBX based on the corresponding relation connected with the mobile switch network. The method includes: accessing PBX into the mobile switch network, assigning a mobile number and an abbreviated short number to each PBX extension. Internal phone can make calls to each other by abbreviated short numbers and mobile number in a same VPMN group. The called phone can display the abbreviated number.

Description

Translated fromChinese

基于用户小交换机的通信系统及其实现通信的方法Communication system based on private branch exchange and method for realizing communication

技术领域technical field

本发明涉及通信技术领域，特别是指基于用户小交换机(PBX)的通信系统及其实现通信的方法。The invention relates to the technical field of communication, in particular to a communication system based on a private branch exchange (PBX) and a method for realizing communication thereof.

背景技术Background technique

目前，企业PBX作为公用电话网络的用户交换机，大都是通过铺设专线接入到固定运营商的交换网络。用户交换机的进网方式主要包括全自动、半自动、全自动和半自动混合、人工转接、多点混合等几种。At present, enterprise PBXs, as subscriber switches of the public telephone network, are mostly connected to the switching network of fixed operators through the laying of dedicated lines. The network access methods of the PBX mainly include fully automatic, semi-automatic, fully automatic and semi-automatic hybrid, manual transfer, multi-point hybrid, etc.

全自动进入公用网的进网方式是指用户交换机以全自动直拨方式进入公用网与端局接口，即DOD+DID方式。若专用交换机的出、入中继接至公用网端局的选组级，出局只听交换机的一次拨号音，简称DOD1方式，入局可直拨到分机用户，简称DID方式。若专用交换机的出局接至公用网端局的用户级，需听两次拨号音进入公用网，简称DOD2方式。入局由端局选组级接出，可直接呼入至该专用交换用户，简称DID方式。The network access method of fully automatic access to the public network means that the user switch enters the interface of the public network and the end office by automatic direct dialing, that is, the DOD+DID method. If the outgoing and incoming trunks of the private exchange are connected to the group selection level of the public network end office, only one dial tone of the exchange will be heard when the outgoing call is made, which is referred to as DOD1 mode, and the incoming call can be directly dialed to the extension user, referred to as DID mode. If the outgoing office of the private exchange is connected to the user level of the end office of the public network, it needs to listen to the dial tone twice to enter the public network, which is called DOD2 mode for short. The incoming call is received at the group selection level of the end office, and can be directly dialed in to the dedicated exchange user, referred to as the DID method.

半自动进入公用网的进网方式是指专用网交换机的出、入中继均接至公用端局的用户级，呼出需听二次拨号音，即DOD2方式。呼入由端局用户级接出，经专用交换机的话务台转至分机用户，即简称BID方式。The semi-automatic network access method of entering the public network means that the outgoing and incoming trunks of the private network switch are connected to the user level of the public end office, and the dial tone needs to be heard twice when calling out, that is, the DOD2 method. The incoming call is received by the user level of the end office, and transferred to the extension user through the attendant console of the special exchange, which is referred to as the BID method.

全自动和半自动混合方式进入公用网是指大容量用户交换机至公用网的呼出中继为全自动方式，即DOD1方式。呼入中继根据需要，一部分为全自动直拨到用户，另一部分呼入中继接至话务台，由人工转接至分机用户。The fully automatic and semi-automatic mixed way to enter the public network means that the outbound relay from the large-capacity subscriber exchange to the public network is fully automatic, that is, the DOD1 mode. According to the needs, some of the incoming trunks are fully automatic and directly dialed to the user, and the other part of the incoming trunk is connected to the attendant console, and then manually transferred to the extension user.

以人工转接方式进入公用网是指当专用网和公用网接口，交换机的一方或双方为人工局时，专用交换机用户经人工转接至公用网。Entering the public network by manual transfer means that when one or both of the switches are manual switches at the interface between the private network and the public network, the private switch user is manually transferred to the public network.

多点混合方式进入公用网是指本地网中几个专用局根据话务流向、交换局的分布地点及局间距离，可以分别采用以上几种方式，在不同接口点进入公用网。Multi-point hybrid access to the public network means that several private offices in the local network can use the above methods to enter the public network at different interface points according to the traffic flow direction, the distribution location of the switching office, and the distance between the offices.

按照PBX分机的编号方式及送出主叫号码的方式可以将PBX分成以下两种：According to the numbering method of the PBX extension and the method of sending the calling number, the PBX can be divided into the following two types:

一种是为PBX分配一个或多个总机号码，企业自己对PBX分机进行短号编号，企业内部分机之间可以通过短号互相拨打。PBX分机做主叫拨打外部电话时，送出总机号码或总机号码+分机号码。外部电话呼叫分机时，拨打总机号码接续到话务台，由话务台转接至被叫，或直接拨打总机号码+分机号码接续到被叫。One is to assign one or more switchboard numbers to the PBX, and the enterprise itself numbers the PBX extensions with short numbers, so that extensions within the enterprise can dial each other through the short numbers. When the PBX extension is used as the calling party to make an external call, it sends the switchboard number or switchboard number + extension number. When an external phone calls an extension, dial the switchboard number to connect to the attendant console, and the attendant console will transfer to the called party, or directly dial the switchboard number + extension number to connect to the called party.

另一种是为每个PBX分机分配一个市话号码，同时每个PBX分机之间可以通过缩位拨号互相拨打。PBX拨打外部电话时，通过与交换机之间的信令配合，能够对外送出分机对应的长号，即市话号码，对方来电显示号码就是这个长号。这样，外部电话拨打这个长号时，可以直接接续到PBX分机。The other is to assign a local phone number to each PBX extension, and at the same time, each PBX extension can call each other through abbreviated dialing. When the PBX makes an external call, through the signaling cooperation with the exchange, it can send out the long number corresponding to the extension, that is, the local phone number, and the caller ID number of the other party is this long number. In this way, when an external phone dials this long number, it can be directly connected to the PBX extension.

随着技术的发展，目前PBX的接入方式越来越多地采用全自动进入公用网的进网方式，相应地固定运营商为每个PBX分机分配一个市话号码。PBX分机可以直接拨打外部电话或通过拨打前缀来拨打外部电话，前缀通常为“0”或“9”；外部电话拨打PBX分机对应市话号码可以直接接续到对应的分机。而且，通常PBX分机间可以进行缩位拨号，即拨打内部短号码接续。With the development of technology, more and more PBX access methods currently adopt automatic access to the public network. Correspondingly, fixed operators assign a local phone number to each PBX extension. The PBX extension can make external calls directly or by dialing the prefix, which is usually "0" or "9"; the external call can directly connect to the corresponding extension when dialing the corresponding local number of the PBX extension. Moreover, usually PBX extensions can perform abbreviated dialing, that is, dial internal short numbers to connect.

由于各运营商之间的竞争，使得一个PBX同时接入多个运营商交换网络的情况也逐渐出现，即PBX可以通过不同的中继组分别接入固定交换网络和移动交换网络。目前，PBX接入方式包括两种，一种是直接与固定交换网络相连，并且通过固定交换网络与移动交换网络相连；另一种是同时与固定交换网络和移动交换网络相连。Due to the competition among operators, the situation that one PBX is connected to switching networks of multiple operators at the same time gradually appears, that is, PBX can access fixed switching networks and mobile switching networks through different trunk groups. At present, there are two access methods of PBX, one is directly connected to the fixed switching network, and connected to the mobile switching network through the fixed switching network; the other is connected to the fixed switching network and the mobile switching network at the same time.

图1为PBX直接接入固定交换网络的组网结构示意图。参见图1所示，PBX通过端局(LS)接入到固定交换网络，并且只与固定网络直接相连。在这种状态下，固定运营商为每个PBX分机分配一个长号，即市话号码。分机之间可以通过市话号码，或缩位短号相互拨打。PBX分机拨打PBX分机以外的电话时，直接拨打外部电话的电话号码接续，当拨打的是移动电话时，话路需要通过固定交换网络的网关(GW)和移动交换网络的网关移动交换中心(GMSC)转接。外部电话直接拨打市话号码或区号+市话号码可以接续到相应的PBX分机，当外部电话为移动电话时，话路需要通过移动交换网络的GMSC和GW转接。FIG. 1 is a schematic diagram of a network structure in which a PBX is directly connected to a fixed switching network. As shown in Figure 1, the PBX is connected to the fixed switching network through the end office (LS), and is only directly connected to the fixed network. In this state, the fixed operator assigns each PBX extension a long number, that is, a local telephone number. The extensions can dial each other through local numbers or abbreviated short numbers. When the PBX extension dials a call other than the PBX extension, it directly dials the phone number of the external phone to connect. When dialing a mobile phone, the call path needs to pass through the gateway (GW) of the fixed switching network and the gateway mobile switching center (GMSC) of the mobile switching network. ) transfer. The external phone can directly dial the local number or area code + local number to connect to the corresponding PBX extension. When the external phone is a mobile phone, the call path needs to be transferred through the GMSC and GW of the mobile switching network.

因此，在图1所示的组网结构中，如果某些移动运营商没有固定交换网络和固定号码资源，将不能实现PBX分机与企业内部移动电话之间的统一短号码编号，因此这种接入方式将不利于这些移动运营商介入PBX话务的竞争。而且由于移动电话和PBX分机之间的来话与去话，即使是在一个企业内部电话之间进行通话，都需要固定网络与移动网络两个网络转接，因此不利于企业降低通信成本。Therefore, in the networking structure shown in Figure 1, if some mobile operators do not have fixed switching networks and fixed number resources, they will not be able to realize the unified short number numbering between PBX extensions and mobile phones within the enterprise, so this connection The access method will be unfavorable for these mobile operators to intervene in the competition of PBX traffic. Moreover, because the incoming and outgoing calls between mobile phones and PBX extensions, even calls between internal phones in an enterprise, both the fixed network and the mobile network need to be transferred, which is not conducive to reducing communication costs for enterprises.

图2为PBX同时接入固定交换网络和移动交换网络的组网结构示意图。参见图2所示，PBX通过LS接入到固定交换网络，通过GMSC接入移动交换网络。这种组网方式由第一种组网方式演变而来，是移动网络运营商与固定网络运营商竞争PBX话务的结果。这种方式由固定运营商为每个PBX分机分配一个市话号码。PBX分机之间可以通过长号或缩位短号相互拨打。PBX分机拨打PBX分机以外的电话时，直接拨打外部电话的电话号码接续，当拨打的是固定电话时，话路通过固定交换网络接续；当拨打的是移动电话时，话路通过移动交换网络接续。外部电话直接拨打市话号码或区号+市话号码可以接续到相应的PBX分机，当外部电话为固定电话时，话路通过固定交换网络转接。当外部电话为移动电话时，本地来话及长途来话就远入网情况下通过移动交换网络接续，长途移动来话就近入网情况下，话路需要通过移动交换网络的GMSC和GW转接。FIG. 2 is a schematic diagram of a network structure in which a PBX is simultaneously connected to a fixed switching network and a mobile switching network. As shown in Figure 2, the PBX is connected to the fixed switching network through the LS, and connected to the mobile switching network through the GMSC. This networking mode evolved from the first networking mode, and is the result of competition between mobile network operators and fixed network operators for PBX traffic. In this way, the fixed operator assigns a local telephone number to each PBX extension. PBX extensions can dial each other through long numbers or abbreviated short numbers. When the PBX extension dials a call other than the PBX extension, it directly dials the phone number of the external phone to continue. When the call is a fixed line, the call is connected through the fixed switching network; when the call is a mobile phone, the call is connected through the mobile switching network. . Directly dial the local phone number or area code + local phone number from the external phone to connect to the corresponding PBX extension. When the external phone is a fixed phone, the call path is transferred through the fixed switching network. When the external phone is a mobile phone, the local incoming calls and long-distance calls are connected through the mobile switching network in the case of remote access to the network, and the long-distance mobile incoming calls are connected to the nearby network, and the call path needs to be transferred through the GMSC and GW of the mobile switching network.

因此，在图2所示的组网结构中，由于某些移动运营商没有固定交换网络和固定号码资源，使得移动运营商介入PBX话务竞争时处于不利地位。而且，这种接入方式不能实现PBX分机与企业内部移动电话之间的统一短号码编号。Therefore, in the networking structure shown in Figure 2, some mobile operators are at a disadvantage when they intervene in PBX traffic competition because some mobile operators do not have fixed switching networks and fixed number resources. Moreover, this access method cannot realize the unified short number numbering between the PBX extension and the mobile phone within the enterprise.

对于上述两种组网方式来说，由于固定交换网络的呼叫路由是直接通过对方号码进行的，所以PBX接入固定交换网并为PBX分机分配全网唯一的号码后，PBX分机在可以做主叫的同时，本地或异地电话拨打相应的号码后，交换网络能够依据分机号码将呼叫接续到相应的PBX分机。For the above two networking methods, since the call routing of the fixed switching network is carried out directly through the other party's number, after the PBX is connected to the fixed switching network and the unique number of the whole network is allocated to the PBX extension, the PBX extension can be the calling party. At the same time, after the local or remote phone dials the corresponding number, the switching network can connect the call to the corresponding PBX extension according to the extension number.

随着移动电话的普及，企业内部员工通常除了有一部办公电话，如PBX分机外，还配备有自己的移动电话。企业对于内部的固定电话和移动电话逐渐有了统一短号编号、短号互相拨打的要求。而目前PBX接入固定交换网络的方式满足不了这种要求。这主要是由于移动交换网络的呼叫路由方式不同于固定交换网络。移动电话可以在网络覆盖范围内漫游，当移动电话开机时，要向归属位置寄存器(HLR)登记自己的位置信息。当移动终端为被叫时，如果主叫也为移动终端，需要呼叫发起的局点通过被叫的归属HLR到其拜访地位置寄存器(VLR)取得被叫的漫游号码，然后通过漫游号码将呼叫接续到被叫。如果主叫为固定电话，则主叫接入移动交换网络入网的GMSC后，再到被叫VLR中取得被叫的漫游号码，然后通过漫游号码将呼叫接续到被叫。如果简单地将PBX接入到移动交换网络，并给PBX分机分配移动号码，由于PBX分机没有开机登记过程，不能在VLR及HLR中登记，也不能分配手机漫游号码，因此，在HLR中不能正常查找，异地电话拨打不了这些分机。With the popularity of mobile phones, employees in an enterprise usually have their own mobile phones in addition to an office phone, such as a PBX extension. Enterprises gradually have the requirement of unified short number numbers for internal fixed telephones and mobile phones, and short numbers for calling each other. However, the current way of PBX accessing the fixed switching network cannot meet this requirement. This is mainly due to the fact that calls are routed on mobile switched networks differently than on fixed switched networks. The mobile phone can roam within the coverage area of the network. When the mobile phone is turned on, it needs to register its location information with the Home Location Register (HLR). When the mobile terminal is called, if the calling party is also a mobile terminal, the originating office needs to obtain the called roaming number from its VLR through the called home HLR, and then use the roaming number to place the call Continue until called. If the caller is a fixed phone, after the caller accesses the GMSC connected to the mobile switching network, he obtains the called roaming number from the called VLR, and then connects the call to the called party through the roaming number. If you simply connect the PBX to the mobile switching network and assign a mobile number to the PBX extension, since the PBX extension does not have a boot registration process, it cannot be registered in the VLR and HLR, nor can it be assigned a mobile phone roaming number. Therefore, it cannot work normally in the HLR. Search, these extensions cannot be dialed from remote telephones.

发明内容Contents of the invention

有鉴于此，本发明的一个目的是提供一种基于用户小交换机的通信系统，使PBX分机利用移动交换网络的移动号码资源进行通信。In view of this, an object of the present invention is to provide a communication system based on a private branch exchange, which enables PBX extensions to use the mobile number resources of the mobile switching network to communicate.

本发明的另一个目的是提供一种实现通信的方法，使同一企业PBX分机电话与企业内部移动电话之间统一短号码编号，从而实现企业PBX分机与企业内部移动电话之间利用短号资源进行接续。Another object of the present invention is to provide a method for realizing communication, so that the same enterprise PBX extension phone and the enterprise internal mobile phone can be unified in short number numbering, thereby realizing the use of short number resources between the enterprise PBX extension and the enterprise internal mobile phone. continue.

本发明还有一个目的是提供一种实现移动虚拟专网通信的方法，使在同一VPMN集团中企业PBX分机与企业内部移动电话之间能利用统一编号的短号通话。Still another object of the present invention is to provide a method for realizing mobile virtual private network communication, so that the unified numbered short number can be used to communicate between the enterprise PBX extension and the enterprise's internal mobile phone in the same VPMN group.

本发明提供的一种基于用户小交换机的通信系统包括：至少包括固定交换网络和移动交换网络，还包括：A communication system based on a private branch exchange provided by the present invention includes: at least including a fixed switching network and a mobile switching network, and also includes:

至少包括一个PBX分机的用户小交换机，所述用户小交换机与移动交换网络的网关移动交换中心相连；A private branch exchange comprising at least one PBX extension, said private branch exchange being connected to a gateway mobile switching center of a mobile switching network;

路由信息提供单元，用于向PBX分机提供漫游号码，并记录PBX分机的移动号码与所述漫游号码之间的对应关系，然后根据所述对应关系向PBX分机提供移动号码，与移动交换网络相连。The routing information providing unit is used to provide the roaming number to the PBX extension, and record the corresponding relationship between the mobile number of the PBX extension and the roaming number, and then provide the mobile number to the PBX extension according to the corresponding relationship, and connect to the mobile switching network .

本发明提供的一种实现通信的方法包括：预先为PBX分机分配移动号码资源，该方法包括：A method for realizing communication provided by the present invention includes: pre-allocating mobile number resources for PBX extensions, and the method includes:

当移动交换网络侧收到PBX分机为主叫的呼叫请求后，根据被叫号码判断被叫是移动终端还是固定终端，如果是移动终端，则根据被叫号码从移动交换网络侧的HLR中获取路由信息，并根据该路由信息将呼叫接续到被叫，如果是固定终端，则通过固定交换网络的网关将呼叫接续到被叫；When the mobile switching network side receives the call request that the PBX extension is the calling party, it judges whether the called party is a mobile terminal or a fixed terminal according to the called number. If it is a mobile terminal, it obtains it from the HLR on the mobile switching network side according to the called number Routing information, and connect the call to the called party according to the routing information, if it is a fixed terminal, connect the call to the called party through the gateway of the fixed switching network;

当移动交换网络侧收到PBX分机为被叫的呼叫请求后，判断该呼叫的接入点是否是PBX分机所属的GMSC，如果是，则根据被叫号码将该呼叫接续到被叫，否则，HLR为该呼叫分配漫游号码，并在HLR中记录该漫游号码与该PBX分机移动号码之间的对应关系，再根据该漫游号码，将该呼叫接续到PBX分机所属的GMSC，该GMSC根据该呼叫的漫游号码，从HLR中记录的漫游号码与移动号码的对应关系中获取对应的移动号码，再根据该移动号码将呼叫接续到被叫。When the mobile switching network side receives the call request that the PBX extension is the called party, it is judged whether the access point of the call is the GMSC to which the PBX extension belongs, if yes, the call is connected to the called party according to the called number, otherwise, The HLR assigns a roaming number to the call, and records the corresponding relationship between the roaming number and the mobile number of the PBX extension in the HLR, and then connects the call to the GMSC to which the PBX extension belongs according to the roaming number, and the GMSC according to the call roaming number, obtain the corresponding mobile number from the corresponding relationship between the roaming number and the mobile number recorded in the HLR, and then connect the call to the called party according to the mobile number.

本发明提供的一种实现移动虚拟专网通信的方法包括：将用户小交换机接入移动交换网络，并将用户小交换机和移动终端划分为同一移动虚拟专网集团，为该集团内PBX分机和移动终端分配移动号码和缩位短号资源，所述缩位短号与移动号码之间一一对应，还包括：A method for realizing mobile virtual private network communication provided by the present invention includes: connecting a private branch exchange to a mobile switching network, and dividing the private branch exchange and mobile terminals into the same mobile virtual private network group, and providing PBX extensions and The mobile terminal allocates mobile number and abbreviated short number resources, and the one-to-one correspondence between the abbreviated short number and the mobile number also includes:

A.当移动交换网络侧的GMSC收到该移动虚拟专网集团内的呼叫请求后，触发主叫智能业务，并向与移动交换网络侧的MSC连接的SCP发送含有被叫号码的启动检测点请求消息；A. When the GMSC on the mobile switching network side receives the call request in the mobile virtual private network group, it triggers the calling intelligent service, and sends the start detection point containing the called number to the SCP connected to the MSC on the mobile switching network side request message;

B.SCP收到该请求消息后，判断被叫号码是移动号码还是缩位短号，如果是移动号码，则执行步骤C，否则，根据所述缩位短号与移动号码间的对应关系，确定该缩位短号对应的移动号码，执行步骤C；After receiving the request message, B.SCP judges whether the called number is a mobile number or an abbreviated number, if it is a mobile number, then execute step C, otherwise, according to the corresponding relationship between the abbreviated number and the mobile number, Determine the mobile number corresponding to the abbreviated short number, and perform step C;

C.SCP向GMSC发送含有被叫移动号码的继续接续指示，GMSC收到该指示后，根据被叫移动号码触发被叫智能业务，将呼叫接续到被叫。C. The SCP sends the continuation instruction containing the called mobile number to the GMSC. After receiving the instruction, the GMSC triggers the called intelligent service according to the called mobile number, and connects the call to the called party.

所述启动检测点请求消息中进一步包括主叫号码，步骤B包括：The calling number is further included in the start detection point request message, and step B includes:

B1、SCP收到该启动检测点请求消息后，开始为主叫计费；After B1, the SCP receives the start detection point request message, it starts charging for the calling party;

在步骤C触发被叫智能业务后，并且在该呼叫接续到被叫前，进一步包括：SCP为被叫计费。After the called intelligent service is triggered in step C, and before the call is connected to the called party, it further includes: the SCP charges the called party.

在步骤C中SCP向GMSC发送的继续接续指示中含有主叫短号码，则在进行接续时，GMSC将主叫短号码发送给被叫，在接续成功后，被叫显示主叫短号码。In step C, the continuation instruction sent by the SCP to the GMSC contains the short number of the calling party, and when the connection is made, the GMSC sends the short number of the calling party to the called party. After the connection is successful, the called party displays the short number of the calling party.

步骤A中所述移动虚拟专网集团内的呼叫请求是PBX分机为主叫、移动电话为被叫的呼叫请求。The call request in the mobile virtual private network group mentioned in step A is a call request in which the PBX extension is the calling party and the mobile phone is the called party.

步骤C包括：Step C includes:

C11、根据被叫的移动号码从移动交换网络侧的HLR/VLR中获取漫游号码，再根据获取的漫游号码将呼叫接续到被叫。C11. Obtain a roaming number from the HLR/VLR on the mobile switching network side according to the called mobile number, and then connect the call to the called party according to the obtained roaming number.

步骤A中所述移动虚拟专网集团内的呼叫请求是移动电话为主叫、PBX分机为被叫的呼叫请求。The call request in the mobile virtual private network group mentioned in step A is a call request in which the mobile phone is the calling party and the PBX extension is the called party.

步骤C包括：Step C includes:

C21、为该PBX分机分配漫游号码，然后根据所述漫游号码和被叫的移动号码将呼叫接续到被叫。C21. Assign a roaming number to the PBX extension, and then connect the call to the called party according to the roaming number and the called mobile number.

步骤C包括：Step C includes:

C211、移动交换网络侧的MSC向HLR发送含有用户号码的SRI消息；C211. The MSC on the mobile switching network side sends an SRI message containing the subscriber number to the HLR;

C212、HLR收到该SRI消息后，判断该用户号码是PBX号码段还是漫游号码，如果是PBX号码，则向MSC发送PBX分机的漫游号码，并且记录漫游号码与PBX分机移动号码的对应关系，然后执行步骤C213，如果是漫游号码，则执行步骤C214；After C212, HLR receives this SRI message, judge whether this subscriber number is a PBX number segment or a roaming number, if it is a PBX number, then send the roaming number of the PBX extension to the MSC, and record the corresponding relationship between the roaming number and the mobile number of the PBX extension, Then execute step C213, if it is a roaming number, then execute step C214;

C213、MSC收到该漫游号码后，根据该漫游号码将呼叫接续到接入PBX分机的GMSC，GMSC向HLR发送该漫游号码的SRI消息，然后执行步骤C212；C213, after the MSC receives the roaming number, the call is connected to the GMSC that accesses the PBX extension according to the roaming number, and the GMSC sends the SRI message of the roaming number to the HLR, and then performs step C212;

C214、HLR从自身记录的漫游号码与移动号码的对应关系中获取该漫游号码所对应的移动号码，并将该移动号码发送至GMSC，并删除该漫游号码和移动号码间对应关系的记录，GMSC根据所述PBX号码段将呼叫接续到被叫PBX分机。C214. The HLR obtains the mobile number corresponding to the roaming number from the correspondence between the roaming number and the mobile number recorded by itself, sends the mobile number to the GMSC, and deletes the record of the correspondence between the roaming number and the mobile number, and the GMSC The call is connected to the called PBX extension according to the PBX number segment.

步骤A中所述移动虚拟专网集团内的呼叫请求是PBX分机为主叫、PBX分机为被叫的呼叫请求。The call request in the mobile virtual private network group mentioned in step A is a call request in which the PBX extension is the calling party and the PBX extension is the called party.

当呼叫请求中的主叫或被叫是PBX分机时，GMSC是根据该PBX分机对应的移动号码或PBX入中继触发对应的智能业务。When the calling or called in the call request is a PBX extension, GMSC triggers the corresponding intelligent service according to the mobile number or PBX incoming trunk corresponding to the PBX extension.

当步骤A中呼叫请求中的主叫是移动终端时，所述主叫智能业务是根据用户的O-CSI触发；When the caller in the call request in step A is a mobile terminal, the caller intelligent service is triggered according to the user's O-CSI;

当步骤A中呼叫请求中的主叫是PBX分机时，所述主叫智能业务是根据主叫号码段触发。When the calling party in the call request in step A is a PBX extension, the calling intelligent service is triggered according to the calling number segment.

当步骤A中呼叫请求中的被叫是移动终端时，所述被叫智能业务是根据T-CSI触发；When the called party in the call request in step A is a mobile terminal, the called intelligent service is triggered according to T-CSI;

当步骤A中呼叫请求中的被叫是PBX分机时，所述被叫智能业务是根据被叫号码段触发。When the called party in the call request in step A is a PBX extension, the called intelligent service is triggered according to the called number segment.

本发明将PBX接入移动交换网络，给每个PBX分机分配一个移动号码和缩位短号，外部电话通过拨打该移动号码接续到相应的PBX分机；在同一VPMN集团内，内部电话之间可以通过缩位短号或移动号码相互拨打，被叫电话可以显示主叫的VPMN短号码。The present invention connects PBX to the mobile exchange network, assigns a mobile number and abbreviated short number to each PBX extension, and external calls are connected to corresponding PBX extensions by dialing the mobile number; within the same VPMN group, internal calls can Call each other through the abbreviated short number or mobile number, and the called phone can display the calling VPMN short number.

附图说明Description of drawings

图1为现有技术的网络结构示意图；FIG. 1 is a schematic diagram of a network structure in the prior art;

图2为现有技术的网络结构示意图；FIG. 2 is a schematic diagram of a network structure in the prior art;

图3为实现本发明的网络结构示意图；Fig. 3 is a schematic diagram of a network structure for realizing the present invention;

图4为HLR收到GMSC/MSC取路由信息的消息处理流程示意图；Fig. 4 is the message processing flow diagram that HLR receives GMSC/MSC and gets routing information;

图5为异地固定电话拨打PBX分机信令流程；Fig. 5 is the signaling process of dialing a PBX extension from a fixed telephone in another place;

图6为移动电话拨打PBX分机信令流程；Fig. 6 dials the PBX extension signaling flow for the mobile phone;

图7为本发明的系统组网示意图；Fig. 7 is a schematic diagram of system networking of the present invention;

图8为PBX分机用VPMN短号呼叫PBX分机的信令流程；Fig. 8 is the signaling process of PBX extension calling PBX extension with VPMN short number;

图9为PBX分机用移动号码呼叫PBX分机的信令流程；Fig. 9 is the signaling process of PBX extension calling PBX extension with mobile number;

图10为PBX分机用VPMN短号码呼叫集团内部移动电话信令流程；Fig. 10 is the signaling flow of the PBX extension using the VPMN short number to call the group's internal mobile phone;

图11为PBX分机用移动号码呼叫集团内部移动电话的信令流程；Fig. 11 is the signaling flow of the PBX extension using the mobile number to call the group's internal mobile phone;

图12为PBX分机呼叫集团外部电话的信令流程；Fig. 12 is the signaling process of the PBX extension calling the external telephone of the group;

图13为集团内部移动电话用VPMN短号呼叫PBX分机信令流程；Fig. 13 is the signaling process of calling the PBX extension by the mobile phone within the group with the VPMN short number;

图14为集团内部移动电话用移动号码呼叫PBX分机信令流程；Fig. 14 is the signaling process of calling the PBX extension by the mobile phone within the group with the mobile number;

图15为集团内部移动电话用VPMN短号呼叫集团内部移动电话信令流程；Fig. 15 is the signaling process of calling the group's internal mobile phone with the VPMN short number by the mobile phone within the group;

图16为集团内部移动电话用移动号码呼叫集团内部移动电话信令流程；Fig. 16 is the signaling process of calling the group's internal mobile phone with the mobile number by the mobile phone within the group;

图17为集团内移动电话呼叫集团外部电话信令流程；Fig. 17 is the signaling process of the mobile phone in the group calling the external phone of the group;

图18为实现本发明方法的组网结构的实施例示意图。Fig. 18 is a schematic diagram of an embodiment of a networking structure for implementing the method of the present invention.

具体实施方式Detailed ways

本发明的核心内容是：将PBX和一个或一个以上个移动电话划分为一个VPMN集团，将PBX接入移动运营商的交换网络，为PBX分机和移动电话分配移动号码和缩位短号，并且移动号码和缩位短号之间存在一一对应关系。在该VPMN集团内部，PBX分机与PBX分机、移动电话之间可以通过短号相互拨打。当PBX分机为主叫、PBX分机为被叫时，移动交换网络侧的GMSC根据被叫的移动号码将呼叫接续到被叫；当PBX分机为主叫、移动电话为被叫时，移动交换网络侧的GMSC根据被叫的移动号码以及从HLR中获取的漫游号码将呼叫接续到被叫；当移动电话为主叫、PBX分机为被叫时，为PBX分机分配漫游号码，并记录该漫游号码与被叫移动号码之间的对应关系，当接续到PBX分机所属的GMSC时，根据记录的漫游号码与被叫移动号码之间的对应关系得到被叫的移动号码，再根据被叫的移动号码接续到被叫。漫游号码与移动号码之间的对应关系可以单独记录在路由信息提供单元中，路由信息提供单元可以设置在HLR中，也可以是一个独立的设备单元。The core content of the present invention is: PBX and one or more mobile phones are divided into a VPMN group, PBX is inserted into the exchange network of mobile operator, mobile number and abbreviated short number are allocated for PBX extension and mobile phone, and There is a one-to-one correspondence between mobile numbers and abbreviated short numbers. Within the VPMN group, PBX extensions, PBX extensions, and mobile phones can dial each other through short numbers. When the PBX extension is the calling party and the PBX extension is the called party, the GMSC on the mobile switching network side connects the call to the called party according to the called mobile number; when the PBX extension is the calling party and the mobile phone is the called party, the mobile switching network The GMSC on the side connects the call to the called party according to the called mobile number and the roaming number obtained from the HLR; when the mobile phone is the calling party and the PBX extension is the called party, assign a roaming number to the PBX extension and record the roaming number The correspondence between the called mobile number and the called mobile number, when connected to the GMSC to which the PBX extension belongs, the called mobile number is obtained according to the corresponding relationship between the recorded roaming number and the called mobile number, and then according to the called mobile number Continue until called. The corresponding relationship between the roaming number and the mobile number can be recorded separately in the routing information providing unit, which can be set in the HLR or can be an independent device unit.

并且，当主叫通过缩位短号拨打被叫时，移动交换网络侧要根据移动号码与缩位短号之间的对应关系获得被叫对应的移动号码，然后再根据获取的移动号码进行接续。Moreover, when the calling party dials the called party through the abbreviated number, the mobile switching network side needs to obtain the corresponding mobile number of the called party according to the corresponding relationship between the mobile number and the abbreviated number, and then perform the connection according to the acquired mobile number. .

下面结合附图和具体实施例详细说明本发明的技术方案。The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

如图3所示，下面以PBX接入GMSC为例，来说明PBX接入移动交换网络的组网结构。PBX通过GMSC接入移动交换网络，由移动运营商为每个PBX分机分配一个移动号码，每个PBX对应一个号码段。PBX分机之间可以通过移动号码或缩位短号相互拨打。As shown in FIG. 3 , the following takes the PBX accessing the GMSC as an example to illustrate the networking structure of the PBX accessing the mobile switching network. PBX accesses the mobile switching network through GMSC, and the mobile operator assigns a mobile number to each PBX extension, and each PBX corresponds to a number segment. PBX extensions can dial each other through mobile numbers or abbreviated short numbers.

在图3所示的组网结构中，PBX分机拨打该VPMN集团以外的电话时，直接拨打外部电话的电话号码进行接续，接续过程与普通移动电话发起呼叫的情况类似。而且，外部电话直接拨打移动号码可以接续到相应的PBX分机。当PBX分机发起呼叫，如果被叫为固定电话，GMSC将话路转接至与之相连的固定交换网络的GW，由固定电话接续到被叫。如果被叫为移动电话，则GMSC通过被叫的HLR到VLR取漫游号码，通过漫游号码将话路接续到被叫。In the network structure shown in Figure 3, when the PBX extension dials a phone outside the VPMN group, it directly dials the phone number of the external phone to connect, and the connection process is similar to the situation where a common mobile phone initiates a call. Moreover, external calls directly dialed to mobile numbers can be connected to corresponding PBX extensions. When the PBX extension initiates a call, if the called party is a fixed phone, the GMSC will transfer the call to the GW of the fixed switching network connected to it, and the fixed phone will connect to the called party. If the called is a mobile phone, then the GMSC gets the roaming number from the called HLR to the VLR, and connects the call to the called through the roaming number.

当主叫为本地固定电话或外地固定电话且采用就远入网时，固定交换网络将话路接续到移动交换网络的GMSC，由GMSC直接接续到PBX分机；当主叫为漫游到本地的移动电话时，包括本地未漫游用户，通过在本地移动交换网做PBX号段路由数据，可以将话路直接路由到GMSC，由GMSC接续到PBX分机。当外部电话为外地固定电话且采用就近入网，或外部电话为外地移动电话，或外部电话为本地的移动电话、但本地移动交换网没有做PBX号段路由数据时，话路的接续需要HLR和GMSC的特殊配合，以下详细说明。When the caller is a local fixed phone or a foreign fixed phone and uses remote network access, the fixed switching network will connect the call to the GMSC of the mobile switching network, and the GMSC will directly connect to the PBX extension; when the calling is a mobile phone roaming to the local In this case, including local non-roaming users, by routing data on the PBX number segment in the local mobile switching network, the call can be directly routed to the GMSC, and then the GMSC can be connected to the PBX extension. When the external telephone is a fixed telephone in a foreign place and adopts the nearest network access, or the external telephone is a mobile telephone in a foreign place, or the external telephone is a local mobile telephone, but the local mobile switching network does not route data for the PBX number segment, the connection of the telephone path requires HLR and The special coordination of GMSC is detailed below.

下面详细说明PBX分机移动号码被叫的接入过程。The following describes in detail the access process of the PBX extension mobile number being called.

虽然PBX分机分配了移动号码，但由于PBX分机不存在开机与关机，也就没有移动电话开机时在VLR及HLR中的登记过程。所以，当MSC或GMSC处理对这些号码的呼叫时，不能取到漫游号码，呼叫也就不通。因此，本实施例对PBX分机开户的HLR和接入PBX的GMSC进行改造。为PBX专门分配移动号码段和漫游号码段。HLR中对PBX的移动号码段进行标记；同时，维护一张用PBX分机移动号码到PBX漫游号码的动态对应关系表。同时，接入PBX的GMSC也要进行改造。当HLR收到取路由信息(SRI)请求消息时，如果SRI消息中的号码为移动号码，则为该请求分配一个漫游号码，并记录该漫游号码和移动号码之间的对应关系，如果SRI消息中的号码为漫游号码，则要从该漫游号码和移动号码之间的对应关系中获取该漫游号码对应的移动号码，再根据该移动号码将呼叫接续到PBX分机。Although the PBX extension is assigned a mobile number, because the PBX extension does not have power-on and power-off, there is no registration process in the VLR and HLR when the mobile phone is turned on. Therefore, when the MSC or GMSC handles calls to these numbers, the roaming number cannot be obtained, and the call will not go through. Therefore, in this embodiment, the HLR for PBX extension account opening and the GMSC for accessing the PBX are transformed. Specially allocate mobile number segments and roaming number segments for PBX. Mark the mobile number segment of the PBX in the HLR; at the same time, maintain a dynamic correspondence table from the mobile number of the PBX extension to the roaming number of the PBX. At the same time, the GMSC connected to the PBX also needs to be transformed. When HLR receives the routing information (SRI) request message, if the number in the SRI message is a mobile number, then a roaming number is allocated for the request, and the correspondence between the roaming number and the mobile number is recorded, if the SRI message If the number in is a roaming number, the mobile number corresponding to the roaming number must be obtained from the correspondence between the roaming number and the mobile number, and then the call is connected to the PBX extension according to the mobile number.

参见图4所示，当HLR收到GMSC/MSC的SRI消息时，其处理过程具体如下：Referring to shown in Figure 4, when HLR received the SRI message of GMSC/MSC, its processing process was specifically as follows:

步骤401：判断SRI消息中的号码属于PBX的移动号码段、PBX的漫游号码段还是真正的手机号码，如果是PBX的移动号码段，执行步骤402，否则，如果是PBX的漫游号码段，执行步骤403，如果是真正的手机号码，则执行步骤404；Step 401: judge whether the number in the SRI message belongs to the mobile number segment of the PBX, the roaming number segment of the PBX or a real mobile phone number, if it is a mobile number segment of the PBX, performstep 402, otherwise, if it is a roaming number segment of the PBX, executeStep 403, if it is a real mobile phone number, then perform step 404;

步骤402：分配一个空闲的PBX漫游号码，返回给GMSC或MSC，并将移动号码与漫游号码的对应关系记录到对应关系表中，然后处理结束，跳出；Step 402: allocate an idle PBX roaming number, return to GMSC or MSC, and record the corresponding relationship between the mobile number and the roaming number in the corresponding relationship table, and then the processing ends and jumps out;

步骤403：查询对应关系表，得到对应的移动号码，将该移动号码作为漫游号码返回给GMSC或MSC；并将对应关系表中相应记录删除以释放漫游号码资源，然后处理结束，跳出；Step 403: Query the correspondence table to obtain the corresponding mobile number, and return the mobile number as a roaming number to the GMSC or MSC; delete the corresponding record in the correspondence table to release the roaming number resources, and then the process ends and jumps out;

步骤404：HLR向该移动电话的VLR发送取漫游号码消息(PRN)，取得漫游号码后向GMSC/MSC返回，此时HLR按正常情况处理。Step 404: HLR sends a roaming number acquisition message (PRN) to the VLR of the mobile phone, and returns to the GMSC/MSC after obtaining the roaming number. At this time, the HLR handles it as normal.

以下分别说明固定电话和移动电话拨打PBX分机时HLR和GMSC配合完成接续的信令流程。The following describes the signaling flow of the connection completed by the cooperation of the HLR and the GMSC when the fixed phone and the mobile phone call the PBX extension.

一、异地固定电话拨打PBX分机信令流程。1. The signaling process of dialing a PBX extension from a fixed-line phone in another place.

参见图5所示，异地固定电话拨打PBX分机信令过程具体如下：Referring to Figure 5, the signaling process of dialing a PBX extension from a fixed-line phone in a different place is as follows:

步骤501：异地固定电话将对PBX分机的呼叫通过固定交换网络的GW接续到移动交换网络GMSC1。Step 501: The remote fixed telephone connects the call to the PBX extension to the mobile switching network GMSC1 through the GW of the fixed switching network.

步骤502：GMSC1向PBX分机开户的HLR发送取漫游号码请求，并且该请求中含有被叫电话号码。Step 502: GMSC1 sends a request for obtaining a roaming number to the HLR where the PBX extension account is opened, and the request contains the called phone number.

步骤503：HLR接到该取漫游号码请求后，根据被叫电话号码确定被叫是PBX分机，直接从PBX漫游号码段分配一个漫游号码，保存该漫游号码和PBX分机号码的对应关系，并将该漫游号码发送至GMSC1。Step 503: After the HLR receives the request to get the roaming number, it determines that the called party is a PBX extension according to the called phone number, directly allocates a roaming number from the PBX roaming number section, saves the corresponding relationship between the roaming number and the PBX extension number, and The roaming number is sent to GMSC1.

步骤504：GMSC1依据该漫游号码将呼叫接续到接入PBX所属的GMSC2。Step 504: GMSC1 connects the call to GMSC2 to which the accessing PBX belongs according to the roaming number.

步骤505：GMSC2向HLR发送含有漫游号码的SRI消息。Step 505: GMSC2 sends the SRI message containing the roaming number to the HLR.

步骤506：HLR收到该SRI消息后，根据SRI消息中的漫游号码从步骤503中记录的对应关系中得到该漫游号码对应的移动号码，并将该移动号码发送至GMSC2，同时删除漫游号码和PBX分机号码的对应关系释放PBX漫游号码资源。Step 506: After the HLR receives the SRI message, it obtains the mobile number corresponding to the roaming number from the corresponding relationship recorded instep 503 according to the roaming number in the SRI message, and sends the mobile number to GMSC2, and deletes the roaming number and The correspondence between PBX extension numbers releases PBX roaming number resources.

步骤507：GMSC2根据PBX分机号码选路，将呼叫接续到PBX。Step 507: GMSC2 selects a route according to the PBX extension number, and connects the call to the PBX.

步骤508：PBX完成到PBX分机的接续。Step 508: The PBX completes the connection to the PBX extension.

二、移动电话拨打PBX分机信令流程。2. The signaling process of calling a PBX extension from a mobile phone.

如图6所示，VPMN集团外部的移动电话拨打VPMN集团内PBX分机信令流程如下：As shown in Figure 6, the signaling process for a mobile phone outside the VPMN group to dial a PBX extension within the VPMN group is as follows:

步骤601：移动电话发起到PBX分机呼叫请求，该呼叫请求中包括PBX分机的移动号码。Step 601: The mobile phone initiates a call request to the PBX extension, and the call request includes the mobile number of the PBX extension.

步骤602：MSC收到该呼叫请求后，向PBX分机所属HLR发送含有该PBX分机移动号码的SRI请求消息。Step 602: After receiving the call request, the MSC sends an SRI request message containing the mobile number of the PBX extension to the HLR to which the PBX extension belongs.

步骤603：HLR收到该SRI请求消息后，根据SRI请求消息中的移动号码确定被叫是PBX分机，直接从PBX漫游号码段分配一个漫游号码，并向MSC返回该漫游号码，同时保存该漫游号码和移动号码的对应关系。Step 603: After receiving the SRI request message, the HLR determines that the called party is a PBX extension according to the mobile number in the SRI request message, directly allocates a roaming number from the PBX roaming number segment, returns the roaming number to the MSC, and saves the roaming number at the same time Correspondence between numbers and mobile numbers.

步骤604：MSC收到该漫游号码后，依据漫游号码将呼叫接续到接入PBX的GMSC。Step 604: After receiving the roaming number, the MSC connects the call to the GMSC connected to the PBX according to the roaming number.

步骤605：GMSC向HLR发送取含有漫游号码的SRI请求消息。Step 605: The GMSC sends an SRI request message containing the roaming number to the HLR.

步骤606：HLR收到该SRI请求消息后，根据其中的移动号码确定用户号码属于PBX漫游号码段，查步骤603中记录的对应关系得到该漫游号码对应的移动号码，并将该移动号码返回给GMSC，同时删除漫游号码和PBX分机号码的对应关系，释放PBX漫游号码资源。Step 606: After the HLR receives the SRI request message, determine that the subscriber number belongs to the PBX roaming number section according to the mobile number therein, check the corresponding relationship recorded in step 603 to obtain the corresponding mobile number of the roaming number, and return the mobile number to The GMSC deletes the corresponding relationship between the roaming number and the PBX extension number at the same time, releasing the PBX roaming number resources.

步骤607：GMSC根据该移动号码将呼叫接续到PBX。Step 607: The GMSC connects the call to the PBX according to the mobile number.

步骤608：PBX完成到PBX分机的接续。Step 608: The PBX completes the connection to the PBX extension.

基于上述组网结构，可以将PBX和移动电话划分为同一个VPMN集团，并将PBX接入到移动交换网络，为PBX分机和移动电话分配移动号码和缩位短号，并且移动号码和缩位短号之间一一对应。在该VPMN集团内部，PBX分机与PBX分机、移动电话之间可以通过短号相互拨打。Based on the above networking structure, the PBX and mobile phones can be divided into the same VPMN group, and the PBX can be connected to the mobile switching network. There is a one-to-one correspondence between the cornets. Within the VPMN group, PBX extensions, PBX extensions, and mobile phones can dial each other through short numbers.

下面结合附图和具体实施例详细说明利用上述组网结构实现VPMN业务的具体过程。The specific process of implementing the VPMN service by using the above-mentioned networking structure will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

参见图7所示，VPMN SCP是智能网中VPMN业务的业务控制点，记录每个VPMN集团内部PBX分机和移动电话的短号码和移动号码的对应关系，VPMN SCP与交换网络GMSC/MSC之间通过移动网络增强业务的客户化应用(CAMEL)应用协议(CAP)交互。当VPMN集团内部电话发起呼叫时，GMSC/MSC触发智能业务到VPMN业务控制点(SCP)，由VPMN SCP完成计费、VPMN短号码和移动号码的翻译。同时，VPMN SCP可以向这些用户提供VPMN业务的其他特性。需要说明的是，同一VPMN集团中的不同终端，VPMN智能业务触发方式不同。PBX分机做主、被叫时，话路路由到GMSC，由GMSC依据PBX号码段触发VPMN智能业务；移动电话做主叫时依据用户的始发CAMEL签约信息(O-CSI)触发VPMN智能业务；移动电话做被叫时依据用户的T-CSI触发VPMN智能业务。Referring to Fig. 7, the VPMN SCP is the service control point of the VPMN business in the intelligent network, and records the corresponding relationship between the short numbers and the mobile numbers of the PBX extensions and mobile phones within each VPMN group, and the relationship between the VPMN SCP and the switching network GMSC/MSC Customizable Application for Enhanced Services (CAMEL) Application Protocol (CAP) interaction over mobile networks. When the internal telephone of VPMN group initiates a call, GMSC/MSC triggers the intelligent service to VPMN Service Control Point (SCP), and VPMN SCP completes the translation of billing, VPMN short number and mobile number. At the same time, the VPMN SCP can provide these users with other features of the VPMN service. It should be noted that different terminals in the same VPMN group have different ways of triggering VPMN intelligent services. When the PBX extension is the master or called, the call route is routed to the GMSC, and the GMSC triggers the VPMN intelligent service according to the PBX number segment; when the mobile phone is the calling party, it triggers the VPMN intelligent service according to the user’s original CAMEL subscription information (O-CSI); the mobile phone When making a call, the VPMN intelligent service is triggered according to the user's T-CSI.

在主叫流程中，GMSC/MSC通过CAP启动检测点(IDP)消息向SCP上报主叫移动号码及其拨打的被叫号码，如果被叫号码为移动号码，则无须进行号码的翻译，VPMN SCP下发CAP继续接续(CONTINUE)指令到GMSC/MSC直接接续；如果被叫号码为VPMN短号码，则VPMN SCP要进行VPMN短号码到移动号码的翻译，并将翻译结果通过CAP连接(CONNECT)指令中的目的地址参数传递给GMSC/MSC才可以接续到被叫。这里，VPMN业务主叫流程的号码翻译分两步：第一步、依据主叫移动号码查询其对应的集团号；第二步、依据集团号和被叫VPMN短号码查询被叫移动号码。In the calling process, the GMSC/MSC reports the calling mobile number and the called number to the SCP through the CAP Initiated Detection Point (IDP) message. If the called number is a mobile number, there is no need to translate the number. VPMN SCP Issue the CAP CONTINUE command to the GMSC/MSC for direct connection; if the called number is a VPMN short number, the VPMN SCP needs to translate the VPMN short number to the mobile number, and pass the translation result through the CAP CONNECT command Pass the destination address parameter in the GMSC/MSC to connect to the called party. Here, the number translation of the VPMN service calling process is divided into two steps: the first step is to query the corresponding group number according to the calling mobile number; the second step is to query the called mobile number according to the group number and the called VPMN short number.

当PBX分机做被叫时，话路路由到GMSC，GMSC依据被叫的号码段触发VPMN业务被叫流程；当移动电话做被叫的时候，MSC依据用户的终止CAMEL签约信息(T-CSI)触发VPMN业务被叫流程。被叫流程中，CAPIDP消息中上报主被叫移动号码。VPMN SCP判断是否集团内呼叫，即主被叫号码对应的集团号是否相同，如果不是集团内呼叫，VPMN SCP下发CAPCONTINUE指令到GMSC/MSC直接接续；如果是集团内呼叫，VPMN SCP依据主叫移动号码得到主叫短号码，通过CAP CONNECT指令中的通用号码参数传递给MSC，用来作为被叫的来电显示号码。When the PBX extension is called, the call route is routed to GMSC, and GMSC triggers the VPMN service calling process according to the called number segment; when the mobile phone is called, MSC uses the user's termination CAMEL subscription information (T-CSI) Trigger the called process of the VPMN service. During the called process, the calling and called mobile numbers are reported in the CAPIDP message. VPMN SCP judges whether it is an intra-group call, that is, whether the group numbers corresponding to the calling and called numbers are the same. If it is not an intra-group call, VPMN SCP sends a CAPCONTINUE command to GMSC/MSC to connect directly; if it is an intra-group call, VPMN SCP The mobile number obtains the short number of the calling party, and passes it to the MSC through the general number parameter in the CAP CONNECT command, which is used as the calling number for the called party.

下面分别详细说明本发明利用图3所示的网络结构实现VPMN业务的处理过程。The following describes in detail how the present invention implements the VPMN service using the network structure shown in FIG. 3 .

一、PBX分机用VPMN短号呼叫PBX分机的信令流程。1. The signaling process for a PBX extension to use a VPMN short number to call a PBX extension.

PBX分机用VPMN短号码呼叫PBX分机的信令流程如图8所示：The signaling flow of a PBX extension using a VPMN short number to call a PBX extension is shown in Figure 8:

步骤801：PBX分机发送初始地址信息消息(IAM)将呼叫接续到GMSC。Step 801: The PBX extension sends an initial address information message (IAM) to connect the call to the GMSC.

步骤802～803：GMSC依据主叫号码段触发智能主叫业务，向SCP发送CAP IDP消息，此时IDP消息中被叫号码为VPMN短号码。Steps 802-803: The GMSC triggers the intelligent calling service according to the calling number segment, and sends a CAP IDP message to the SCP. At this time, the called number in the IDP message is a VPMN short number.

步骤804～807：SCP对被叫进行号码翻译，得到被叫的移动号码，并对主叫进行计费处理，然后下发CAP请求报告基本呼叫状态模型事件(RRBE)、CAP申请计费(AC)、CAP CONNECT消息指示GMSC继续接续，其中CAP CONNECT消息中的目的号码参数为被叫的移动号码。Steps 804-807: The SCP performs number translation for the called party, obtains the called mobile number, and performs charging processing on the calling party, and then issues CAP Request Report Basic Call State Model Event (RRBE), CAP Application Accounting (AC ), the CAP CONNECT message instructs the GMSC to continue the connection, wherein the destination number parameter in the CAP CONNECT message is the called mobile number.

步骤808：GMSC收到CAP CONNECT消息以后，依据被叫号码段触发智能被叫业务，向SCP发送CAP IDP消息。Step 808: After receiving the CAP CONNECT message, the GMSC triggers the intelligent called service according to the called number segment, and sends a CAP IDP message to the SCP.

步骤809～812：SCP对被叫进行计费处理，判断出主、被叫属于同一个VPMN集团，得到主叫对应的VPMN短号码，然后下发CAP RRBE、CAP AC、CAP CONNECT消息指示GMSC继续接续，其中CAP CONNECT消息中的通用号码参数为主叫的VPMN短号码。Steps 809-812: The SCP performs billing processing on the called party, determines that the calling party and the called party belong to the same VPMN group, obtains the VPMN short number corresponding to the calling party, and then issues CAP RRBE, CAP AC, and CAP CONNECT messages to instruct the GMSC to continue The general number parameter in the CAP CONNECT message is the VPMN short number of the calling party.

步骤813：GMSC依据被叫移动号码将呼叫接续到PBX，向PBX发送IAM消息，其中的主叫号码参数为CAP CONNECT消息中的通用号码参数，即主叫PBX分机对应的VPMN短号。PBX完成到被叫PBX分机的接续，被叫来电显示号码为主叫VPMN短号码。Step 813: The GMSC connects the call to the PBX according to the called mobile number, and sends an IAM message to the PBX, wherein the calling number parameter is the general number parameter in the CAP CONNECT message, that is, the VPMN short number corresponding to the calling PBX extension. The PBX completes the connection to the called PBX extension, and the called number is the short VPMN number of the calling party.

二、PBX分机用移动号码呼叫PBX分机的信令流程。2. The signaling process for a PBX extension to call a PBX extension with a mobile number.

PBX分机用移动号码呼叫PBX分机的信令流程如图9所示。The signaling flow of the PBX extension using the mobile number to call the PBX extension is shown in FIG. 9 .

PBX分机用移动号码呼叫PBX分机的信令流程与PBX分机用VPMN短号码呼叫PBX分机的信令流程不同之处在于：主叫流程上报被叫号码为移动号码，VPMN SCP无需进行被叫号码的翻译，所以主叫流程中下发CAPCONTINUE消息指示GMSC继续接续。The difference between the signaling flow of a PBX extension calling a PBX extension with a mobile number and the signaling flow of a PBX extension calling a PBX extension with a VPMN short number is that the calling process reports the called number as a mobile number, and VPMN SCP does not need to carry out the called number Translation, so the CAPCONTINUE message is sent during the calling process to instruct the GMSC to continue the connection.

PBX分机用移动号码呼叫PBX分机情况下，被叫的来电显示号码也可以为主叫的VPMN短号码。这点与目前PBX分机之间互拨始终显示缩位短号的情况类似。When a PBX extension uses a mobile number to call a PBX extension, the called caller ID number can also be the calling VPMN short number. This point is similar to the current situation that the mutual dialing between PBX extensions always displays the abbreviated short number.

三、PBX分机用VPMN短号码呼叫集团内部移动电话信令流程。3. The PBX extension uses the VPMN short number to call the group's internal mobile phone signaling process.

PBX分机用VPMN短号码呼叫集团内部移动电话的信令流程如图10所示：The signaling flow of the PBX extension using the VPMN short number to call the mobile phone within the group is shown in Figure 10:

步骤1001～1007：PBX分机用VPMN短号码呼叫集团内部移动电话信令流程中，主叫流程与用短号码呼叫PBX分机相同，VPMN SCP完成号码翻译，通过CAP CONNECT消息将被叫移动号码下发给GMSC接续。Steps 1001 to 1007: In the signaling process of the PBX extension using the VPMN short number to call the group's internal mobile phone, the calling process is the same as calling the PBX extension using the short number. The VPMN SCP completes the number translation and sends the called mobile number through the CAP CONNECT message Connect to GMSC.

步骤1008～1009：GMSC得到移动电话移动号码后，向用户归属HLR发送SRI消息取漫游号码，HLR收到该消息后，发现用户有CAMEL签约信息CSI，则先不取漫游号码，直接返回用户的CSI。Steps 1008-1009: After the GMSC obtains the mobile number of the mobile phone, it sends an SRI message to the user's home HLR to obtain the roaming number. After receiving the message, the HLR finds that the user has the CAMEL subscription information CSI. CSI.

步骤1010～1015：GMSC依据其中的T-CSI触发被叫智能业务，向SCP发送CAP IDP消息。SCP对被叫进行计费处理，判断出主被叫属于同一个VPMN集团，得到主叫对应的VPMN短号码，然后通过CAP CONNECT消息将主叫的VPMN短号码下发给GMSC。Steps 1010-1015: The GMSC triggers the called intelligent service according to the T-CSI, and sends a CAP IDP message to the SCP. The SCP performs billing processing on the called party, determines that the calling party and the called party belong to the same VPMN group, obtains the VPMN short number corresponding to the calling party, and then sends the calling VPMN short number to the GMSC through the CAP CONNECT message.

步骤1016～1019：GMSC收到被叫流程的CAP CONNECT消息以后，进行正常的呼叫接续处理，再次向被叫的归属HLR发送SRI消息取漫游号码，与第一次不同的是，此次消息中指示抑制CSI参数，HLR收到该消息后，向被叫拜访VLR取被叫漫游号码，取到后向GMSC返回。GMSC得到漫游号码后，依据漫游号码接续。出局的IAM消息中主叫号码替换为主叫的VPMN短号码，因此被叫来电显示号码为这个VPMN短号码。Steps 1016-1019: After receiving the CAP CONNECT message of the called process, the GMSC performs normal call connection processing, and sends an SRI message to the called home HLR again to obtain the roaming number. The difference from the first time is that in this message Indicates to suppress the CSI parameter. After receiving the message, the HLR obtains the called roaming number from the called visiting VLR, and returns it to the GMSC after obtaining it. After the GMSC obtains the roaming number, it connects according to the roaming number. In the outgoing IAM message, the calling number is replaced with the short VPMN number of the calling party, so the calling number of the called party is the short VPMN number.

四、PBX分机用移动号码呼叫集团内部移动电话信令流程。4. The PBX extension uses the mobile number to call the group's internal mobile phone signaling process.

PBX分机用移动号码呼叫集团内部移动电话的信令流程如图11所示。Figure 11 shows the signaling flow of a PBX extension using a mobile number to call a mobile phone within a group.

PBX分机用移动号码呼叫集团内部移动电话的信令流程与PBX分机用VPMN短号码呼叫内部移动电话的信令流程不同之处在于主叫流程上报被叫号码为移动号码，SCP无需进行被叫号码的翻译。所以主叫流程中下发CAP CONTINUE消息指示GMSC继续接续。The difference between the signaling process of a PBX extension using a mobile number to call an internal mobile phone within a group and the signaling process of a PBX extension using a VPMN short number to call an internal mobile phone is that the calling process reports the called number as a mobile number, and the SCP does not need to carry out the called number. translation. Therefore, the CAP CONTINUE message is sent during the calling process to instruct the GMSC to continue the connection.

PBX分机用移动号码呼叫移动电话情况下，被叫的来电显示号码也可以为主叫的VPMN短号码。When a PBX extension uses a mobile number to call a mobile phone, the called caller ID number can also be the calling VPMN short number.

五、PBX分机呼叫集团外部电话信令流程。5. The PBX extension calls the external telephone signaling process of the group.

PBX分机呼叫集团外部电话的信令流程如图12所示。Figure 12 shows the signaling process for a PBX extension to call an external phone of the group.

对于外部电话，只能用移动号码或固定电话号码进行呼叫。触发智能业务后，SCP无需进行号码翻译。For external calls, calls can only be made from mobile or landline numbers. After the intelligent service is triggered, the SCP does not need to translate the number.

六、集团内部移动电话用VPMN短号呼叫PBX分机信令流程。6. The signaling process of calling the PBX extension by the mobile phone within the group using the VPMN short number.

集团内部移动电话用VPMN短号呼叫PBX分机信令流程如图13所示：Figure 13 shows the signaling process of calling a PBX extension from a mobile phone within the group using a VPMN short number:

步骤1301～1306：移动电话用VPMN短号呼叫PBX分机的时候，MSC依据用户O-CSI触发VPMN智能主叫业务，SCP对主叫计费，完成号码翻译，通过CAP CONNECT消息将被叫移动号码下发给MSC接续。Steps 1301-1306: When the mobile phone uses the VPMN short number to call the PBX extension, the MSC triggers the VPMN smart calling service according to the user O-CSI, the SCP charges the calling party, completes the number translation, and transmits the called mobile number through the CAP CONNECT message Send it to the MSC for connection.

步骤1307～1310：MSC接续的时候，向PBX开户的HLR发送SRI取漫游号码。HLR判断出用户号码是PBX号段号码，于是分配一个PBX漫游号码向MSC返回，并记录该漫游号码和PBX分机移动号码的对应关系。MSC依据这个漫游号码将呼叫接续到接入PBX的GMSC。Steps 1307-1310: When the MSC connects, send SRI to the HLR where the PBX account is opened to obtain the roaming number. The HLR judges that the subscriber number is a PBX number segment number, so it assigns a PBX roaming number to return to the MSC, and records the corresponding relationship between the roaming number and the mobile number of the PBX extension. The MSC will connect the call to the GMSC connected to the PBX according to the roaming number.

步骤1311～1314：GMSC处理该呼叫的时候，判断出漫游号码属于PBX漫游号码，于是向PBX开户的HLR发送SRI消息取PBX分机的移动号码。HLR收到GMSC的取SRI消息后，判断用户号码是PBX的漫游号码，则查PBX漫游号码与移动号码对应关系，获取对应的移动号码，然后删除该对应关系，释放PBX漫游号码资源，返回PBX分机的移动号码。Steps 1311-1314: When the GMSC processes the call, it judges that the roaming number belongs to the PBX roaming number, so it sends an SRI message to the HLR where the PBX account is opened to get the mobile number of the PBX extension. After receiving the SRI message from GMSC, HLR judges that the user number is the roaming number of PBX, then checks the corresponding relationship between PBX roaming number and mobile number, obtains the corresponding mobile number, then deletes the corresponding relationship, releases the resource of PBX roaming number, and returns to PBX The mobile number of the extension.

步骤1315～1321：GMSC得到被叫PBX分机的移动号码后，依据被叫号码段触发智能被叫业务。SCP对被叫进行计费处理，判断出主被叫属于同一VPMN集团，得到主叫对应的VPMN短号码，然后通过CAP CONNECT消息中的通用号码参数将主叫的VPMN短号码下发给GMSC。GMSC依据被叫移动号码将呼叫接续到PBX。PBX完成到被叫PBX分机的接续，被叫来电显示号码为主叫VPMN短号码。Steps 1315-1321: After obtaining the mobile number of the called PBX extension, the GMSC triggers the smart called service according to the called number segment. The SCP performs billing processing on the called party, determines that the calling party and the called party belong to the same VPMN group, obtains the VPMN short number corresponding to the calling party, and then sends the calling VPMN short number to the GMSC through the general number parameter in the CAP CONNECT message. GMSC connects the call to PBX according to the called mobile number. The PBX completes the connection to the called PBX extension, and the called number is the short VPMN number of the calling party.

七、集团内部移动电话用移动号码呼叫PBX分机信令流程。7. The signaling process of calling the PBX extension by the mobile phone within the group using the mobile number.

集团内部移动电话用移动号码呼叫PBX分机信令流程如图14所示。Figure 14 shows the signaling flow of a mobile phone within a group calling a PBX extension with a mobile number.

集团内部移动电话用移动号码呼叫PBX分机的信令流程与内部移动电话用VPMN短号码呼叫PBX分机的信令流程不同之处在于：主叫流程上报被叫号码为移动号码，VPMN SCP无需进行被叫号码的翻译。SCP下发CAPCONTINUE消息指示GMSC继续接续。The signaling process of calling a PBX extension by a mobile phone number within a group is different from the signaling process of calling a PBX extension by a VPMN short number from an internal mobile phone in that: the calling process reports the called number as a mobile number, and the VPMN SCP does not need to be Call the translation of the number. The SCP sends a CAPCONTINUE message to instruct the GMSC to continue the connection.

移动电话用移动号码呼叫PBX分机情况下，被叫的来电显示号码也可以为主叫的VPMN短号码。When a mobile phone uses a mobile number to call a PBX extension, the called caller ID number can also be the calling VPMN short number.

八、集团内部移动电话用VPMN短号呼叫集团内部移动电话信令流程。8. The group internal mobile phone uses the VPMN short number to call the group internal mobile phone signaling process.

集团内部移动电话用VPMN短号呼叫集团内部移动电话的信令流程如图15所示：Figure 15 shows the signaling process for the intra-group mobile phone to use the VPMN short number to call the intra-group mobile phone:

集团内部移动电话用VPMN短号呼叫集团内部移动电话的信令流程Signaling process for intra-group mobile phones to use VPMN short numbers to call intra-group mobile phones

步骤1501～1506：集团内部移动电话用VPMN短号呼叫集团内部移动电话的时候，MSC依据用户O-CSI触发VPMN智能主叫业务，SCP对主叫计费，完成号码翻译，通过CAP CONNECT消息将被叫移动号码下发给MSC接续。Steps 1501-1506: When the mobile phone in the group calls the mobile phone in the group with the VPMN short number, the MSC triggers the VPMN intelligent calling service according to the user O-CSI, the SCP charges the calling party, completes the number translation, and passes the CAP CONNECT message to the The called mobile number is issued to the MSC for connection.

步骤1507～1509：MSC接续的时候，向被叫用户归属的HLR发送SRI消息取漫游号码。HLR判断出用户有CAMEL签约信息(CSI)，则直接返回CSI。Steps 1507-1509: when the MSC connects, it sends an SRI message to the HLR to which the called user belongs to obtain the roaming number. The HLR judges that the user has CAMEL subscription information (CSI), and returns the CSI directly.

步骤1510～1515：MSC依据用户的T-CSI触发智能被叫业务。SCP对被叫进行计费处理，判断出主被叫属于同一个VPMN集团，得到主叫对应的VPMN短号码，然后通过CAP CONNECT消息中的通用号码参数将主叫的VPMN短号码下发给MSC。Steps 1510-1515: The MSC triggers the intelligent called service according to the user's T-CSI. The SCP performs billing processing on the called party, determines that the calling party and the called party belong to the same VPMN group, obtains the VPMN short number corresponding to the calling party, and then sends the calling VPMN short number to the MSC through the general number parameter in the CAP CONNECT message .

步骤1516～1518：MSC再次向被叫用户归属的HLR发送SRI消息取漫游号码。这次SRI消息指示抑制CSI信息。HLR向被叫拜访VLR发送PRN，得到漫游号码后返回给MSC。Steps 1516-1518: The MSC sends an SRI message to the HLR to which the called user belongs again to obtain the roaming number. This time the SRI message indicates to suppress the CSI information. HLR sends PRN to the called VLR and returns to MSC after obtaining the roaming number.

步骤1519：MSC依据被叫漫游号码将呼叫接续到被叫漫游的MSC。发送的IAM消息中被叫号码为被叫的漫游号码，主叫号码为主叫的VPMN短号码。被叫来电显示号码为主叫VPMN短号码。Step 1519: The MSC connects the call to the MSC where the called party roams according to the called party's roaming number. In the sent IAM message, the called number is the called roaming number, and the calling number is the calling VPMN short number. The ID number of the called party is the short VPMN number of the calling party.

九、集团内部移动电话用移动号码呼叫集团内部移动电话信令流程。9. The group's internal mobile phone uses the mobile number to call the group's internal mobile phone signaling process.

集团内部移动电话用移动号码呼叫集团内部移动电话的信令流程如图16所示：Figure 16 shows the signaling process for the mobile phone within the group to use the mobile number to call the mobile phone within the group:

内部移动电话用移动号码呼叫内部移动电话的信令流程与内部移动电话用VPMN短号码呼叫内部移动电话的信令流程不同之处在于主叫流程上报被叫号码为移动号码，SCP无需进行被叫号码的翻译。SCP下发CAPCONTINUE消息指示GMSC继续接续。The signaling process of calling an internal mobile phone with a mobile number from an internal mobile phone is different from the signaling process of calling an internal mobile phone with a VPMN short number in that the calling process reports the called number as a mobile number, and the SCP does not need to Translation of numbers. The SCP sends a CAPCONTINUE message to instruct the GMSC to continue the connection.

当内部移动电话用移动号码呼叫移动电话情况下，被叫的来电显示号码可以为主叫的VPMN短号码。When the internal mobile phone uses the mobile number to call the mobile phone, the called caller ID number can be the calling VPMN short number.

十、集团内移动电话呼叫集团外部电话信令流程。10. The signaling process of the intra-group mobile phone calling the group's external phone.

集团内移动电话呼叫集团外部电话信令流程如图17所示：Figure 17 shows the signaling process of a mobile phone within a group calling an external phone of the group:

对于外部电话，只能用移动号码或固定电话号码进行呼叫。触发智能业务后，SCP无需进行号码翻译。For external calls, calls can only be made from mobile or landline numbers. After the intelligent service is triggered, the SCP does not need to translate the number.

需要说明的是，在上述实施例中PBX是直接接入GMSC，而PBX也可以通过一个前置机间接接入GMSC，如图18所示。这种接入方式使得网络层次更加清晰，当存在多个PBX情况下，可以简化GMSC的数据配置。It should be noted that, in the above embodiment, the PBX is directly connected to the GMSC, but the PBX can also be indirectly connected to the GMSC through a front-end processor, as shown in FIG. 18 . This access method makes the network hierarchy clearer, and can simplify the data configuration of the GMSC when there are multiple PBXs.

在引入PBX前置机情况下，GMSC上PBX分机智能主叫业务的触发可以采用接入码触发方式。此时，需要PBX前置机对呼叫中的被叫号码增加接入码的号码变换，GMSC依据PBX增加的接入码触发业务。另外，一般情况下，PBX分机被叫不计费，如果PBX分机为被叫情况下没有显示VPMN短号码要求，GMSC可以不触发PBX分机被叫业务。In the case of introducing the PBX front-end device, the trigger of the PBX extension intelligent calling service on the GMSC can be triggered by the access code. At this time, it is necessary for the PBX front-end processor to change the number by adding an access code to the called number in the call, and the GMSC triggers the service according to the access code added by the PBX. In addition, under normal circumstances, PBX extensions are not charged when they are called. If the PBX extension does not display the VPMN short number requirement when the PBX extension is called, GMSC does not need to trigger the PBX extension called service.

对于PBX分机智能业务的触发，上述实施例中为号段触发方式。由于PBX接入GMSC后，接入用到的GMSC的出、入中继都是一定的，智能业务也可以依据GMSC用到的出、入中继来触发智能业务，即：当GMSC处理来自PBX入中继的呼叫请求时，触发智能主叫业务；当GMSC处理去往PBX出中继的呼叫时，触发智能被叫业务。For the triggering of the intelligent service of the PBX extension, in the above-mentioned embodiment, it is the number segment triggering mode. After the PBX is connected to the GMSC, the outgoing and incoming trunks of the GMSC used for access are fixed, and the smart service can also be triggered according to the outgoing and incoming trunks used by the GMSC, that is, when the GMSC processes the When the call request of the incoming trunk is triggered, the smart calling service is triggered; when the GMSC handles the call to the outgoing trunk of the PBX, the smart called service is triggered.

Claims (7)

Translated fromChinese

1.一种基于用户小交换机的通信系统，其特征在于，至少包括固定交换网络和移动交换网络，该系统还包括：1. A communication system based on a private branch exchange, characterized in that it at least includes a fixed switching network and a mobile switching network, and the system also includes:至少包括一个PBX分机的用户小交换机，所述用户小交换机与移动交换网络的网关移动交换中心相连；A private branch exchange comprising at least one PBX extension, said private branch exchange being connected to a gateway mobile switching center of a mobile switching network;路由信息提供单元，用于向PBX分机提供漫游号码，并记录PBX分机的移动号码与所述漫游号码之间的对应关系，根据所述对应关系向PBX分机所属的网关移动交换中心提供所述移动号码，与移动交换网络相连。The routing information providing unit is used to provide the roaming number to the PBX extension, and record the corresponding relationship between the mobile number of the PBX extension and the roaming number, and provide the mobile switching center to the gateway mobile switching center to which the PBX extension belongs according to the corresponding relationship. number, connected to the mobile switching network.2.根据权利要求1所述的系统，其特征在于，所述用户小交换机通过PBX前置机与GMSC相连。2. The system according to claim 1, wherein the private branch exchange is connected with the GMSC through a PBX front-end processor.3.根据权利要求1所述的系统，其特征在于，所述路由信息提供单元为HLR。3. The system according to claim 1, wherein the routing information providing unit is an HLR.4.一种实现通信的方法，其特征在于，预先为PBX分机分配移动号码资源，该方法还包括：4. A method for realizing communication, characterized in that, assigning mobile number resources for PBX extensions in advance, the method also includes:当移动交换网络侧收到PBX分机为主叫的呼叫请求后，根据被叫号码判断被叫是移动终端还是固定终端，如果是移动终端，则根据被叫号码从移动交换网络侧的HLR中获取路由信息，并根据该路由信息将呼叫接续到被叫，如果是固定终端，则通过固定交换网络的网关将呼叫接续到被叫；When the mobile switching network side receives the call request that the PBX extension is the calling party, it judges whether the called party is a mobile terminal or a fixed terminal according to the called number. If it is a mobile terminal, it obtains it from the HLR on the mobile switching network side according to the called number Routing information, and connect the call to the called party according to the routing information, if it is a fixed terminal, connect the call to the called party through the gateway of the fixed switching network;当移动交换网络侧收到PBX分机为被叫的呼叫请求后，判断该呼叫的接入点是否为PBX分机所属的GMSC，如果是，则根据被叫号码将该呼叫接续到被叫，否则，HLR为该呼叫分配漫游号码，并在HLR中记录该漫游号码与该PBX分机移动号码之间的对应关系，再根据该漫游号码，将该呼叫接续到PBX分机所属的GMSC，该GMSC根据该呼叫的漫游号码，从HLR中记录的漫游号码与移动号码的对应关系中获取对应的移动号码，再根据该移动号码将呼叫接续到被叫。When the mobile switching network side receives the call request that the PBX extension is the called party, it is judged whether the access point of the call is the GMSC to which the PBX extension belongs, if yes, the call is connected to the called party according to the called number, otherwise, The HLR assigns a roaming number to the call, and records the corresponding relationship between the roaming number and the mobile number of the PBX extension in the HLR, and then connects the call to the GMSC to which the PBX extension belongs according to the roaming number, and the GMSC according to the call roaming number, obtain the corresponding mobile number from the corresponding relationship between the roaming number and the mobile number recorded in the HLR, and then connect the call to the called party according to the mobile number.5.一种实现移动虚拟专网通信的方法，其特征在于，将用户小交换机接入移动交换网络，并将用户小交换机和移动终端划分为同一移动虚拟专网集团，为该集团内PBX分机和移动终端分配移动号码和缩位短号资源，所述缩位短号与移动号码之间一一对应，该方法还包括：5. A method for realizing mobile virtual private network communication, characterized in that, the user branch exchange is connected to the mobile switching network, and the user branch exchange and the mobile terminal are divided into the same mobile virtual private network group, and the PBX extension in the group is Allocating mobile number and abbreviated number resources with the mobile terminal, the one-to-one correspondence between the abbreviated short number and the mobile number, the method also includes:A.当移动交换网络侧的MSC收到该移动虚拟专网集团内的呼叫请求后，触发主叫智能业务，并向与该MSC连接的SCP发送含有被叫号码的启动检测点请求消息；A. After receiving the call request in the mobile virtual private network group, the MSC on the mobile switching network side triggers the calling intelligent service, and sends a start detection point request message containing the called number to the SCP connected to the MSC;B.SCP收到该请求消息后，判断被叫号码是移动号码还是缩位短号，如果是移动号码，则执行步骤C，否则，根据所述缩位短号与移动号码间的对应关系，确定该缩位短号对应的移动号码，执行步骤C；After receiving the request message, B.SCP judges whether the called number is a mobile number or an abbreviated number, if it is a mobile number, then execute step C, otherwise, according to the corresponding relationship between the abbreviated number and the mobile number, Determine the mobile number corresponding to the abbreviated short number, and perform step C;C.SCP向MSC发送含有被叫移动号码的继续接续指示，当步骤A中所述呼叫请求是移动电话为主叫、PBX分机为被叫时，包括以下步骤：C.SCP sends to MSC the continuation connection instruction that contains called mobile number, and when the call request described in step A is that mobile phone is calling party, PBX extension is when being called, comprise the following steps:C211、移动交换网络侧的MSC向HLR发送含有用户号码的SRI消息；C211. The MSC on the mobile switching network side sends an SRI message containing the subscriber number to the HLR;C212、HLR收到该SRI消息后，判断该用户号码是PBX移动号码还是漫游号码，如果是PBX移动号码，则向MSC发送PBX分机的漫游号码，并且记录漫游号码与PBX分机移动号码的对应关系，然后执行步骤C213，如果是漫游号码，则执行步骤C214；C212, after the HLR receives the SRI message, judge whether the subscriber number is a PBX mobile number or a roaming number, if it is a PBX mobile number, then send the roaming number of the PBX extension to the MSC, and record the corresponding relationship between the roaming number and the PBX extension mobile number , then perform step C213, if it is a roaming number, then perform step C214;C213、MSC收到该漫游号码后，根据该漫游号码将呼叫接续到接入PBX分机的GMSC，GMSC向HLR发送含有漫游号码的SRI消息，然后执行步骤C212；C213, after the MSC receives the roaming number, the call is connected to the GMSC that accesses the PBX extension according to the roaming number, and the GMSC sends an SRI message containing the roaming number to the HLR, and then performs step C212;C214、HLR从自身记录的漫游号码与移动号码的对应关系中获取该漫游号码所对应的移动号码，并将该移动号码发送至GMSC，GMSC根据所述PBX移动号码触发被叫智能业务，将呼叫接续到被叫PBX分机。C214. The HLR obtains the mobile number corresponding to the roaming number from the corresponding relationship between the roaming number and the mobile number recorded by itself, and sends the mobile number to the GMSC. The GMSC triggers the called intelligent service according to the PBX mobile number, and calls Connect to the called PBX extension.6.根据权利要求5所述的方法，其特征在于，所述启动检测点请求消息中进一步包括主叫号码，步骤B包括：6. The method according to claim 5, wherein the start detection point request message further comprises a calling number, and step B comprises:B1、SCP收到该启动检测点请求消息后，开始为主叫计费；After B1, the SCP receives the start detection point request message, it starts charging for the calling party;在步骤C触发被叫智能业务后，并且在该呼叫接续到被叫前，进一步包括：SCP为被叫计费。After the called intelligent service is triggered in step C, and before the call is connected to the called party, it further includes: the SCP charges the called party.7.根据权利要求5所述的方法，其特征在于，所述主叫智能业务是根据用户的O-CSI触发。7. The method according to claim 5, wherein the calling intelligent service is triggered according to the user's O-CSI.

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