一种孤站点对点呼叫的实现方法技术领域本发明涉及移动网络的业务呼叫方法，特别是指一种孤站点对点呼叫的实现方法。 One kind of solitary station implemented TECHNICAL FIELD point call The present invention relates to a service call method of a mobile network, in particular the implementation point call refers to a lone station. 背景技术采用集群专网建设思路发展集群通讯网络，由于技术和制试不一，各集团独立建设，容易形成各自为政的建设局面，导致频率利用效率低下，网络建设成本和网络维护费用高等弊端。 BACKGROUND using cluster private network construction idea of the development cluster communication network, due to technical and system test varies, each group independent construction, easy to form a fragmented building situation, resulting in poor frequency utilization efficiency, cost of network construction and network maintenance cost disadvantages. 随着集群通讯技术由模拟向数字发展， 集群网络建设呈现出由独立专网建设向集群公网建设方向发展的趋势。 With the trunking communication technology from analog to digital, cluster network construction in the development of the cluster public network construction direction by an independent private network construction trends. 由于全球移动通信系统（GSM)系统技术体制先进，在全世界范围内具有最为广泛的用户基础，并且欧洲已制定出一套用于铁路移动通信的国际标准全球铁路移动通信系统（GSM-R),它以GSM通信技术作为业务承载，能够提供增强多级优先与抢占（eMLPP)业务、话音组呼业务（VGCS)和话音广播业务（VBS)等基本集群通信业务。 Due to the advanced Global System for Mobile Communications (GSM) system technology system, has the most extensive user base worldwide, and Europe has to develop international standards for the global rail System for Mobile Communications (GSM-R) set for railway mobile communications, it GSM communication technology as a service bearer, capable of providing enhanced multi-level precedence and preemption (the eMLPP) services, voice group call service (the VGCS) and voice broadcast service (VBS) and other basic trunk communication services. 因此，发展基于GSM的数字集群系统不仅适合我国国情，还具备很好的技术基础。 Therefore, the development of GSM digital trunking system based not only suitable for China, but also have a good technical foundation. 由于蜂窝系统的固有网络结构特点具有基站站点多、分布广，并且基站至基站控制器的物理连接复杂，中间往往要经过传输设备的中继转接，加上传输设备的多样性，维护人员素质参差不齐，因此很难保证所有基站至基站控制器的传输总是保持正常连接状态，GSM体制下基站与基站控制器之间的接口，即Abis接口传输断链时有发生。 Due to the inherent network structure characteristics of a cellular system having a base station site, widely distributed, and the base station to the physical connecting the base station controller complexity, intermediate often after a relay transmission apparatus adapter, together with the diversity of transmission equipment, maintenance personnel quality uneven, it is difficult to ensure that all base stations to the transmission station controller always remains a normal connection state, the interface between the GSM system base stations and base station controllers, i.e. when the Abis interface transmission chain scission occurred. 通常，服务于大众的GSM公网建设和服务于公安、消防以及各政府部门的基于GSM系统的集群公网建设对于基站服务的可获得性要求不同， GSM公网服务于大众，因基站传输断链而中断业务时， 一般不会造成很大 In general, in the public service of the GSM public network construction and service availability requirements of police, fire and various government departments cluster-based public construction of the GSM system for the base station of a different, GSM public network services to the public, because the base station transmission off when the chain is interrupted business, usually does not cause significant
损失，且由于GSM公网服务不存在区域范围特征，即用户一般要呼叫的对象与其在同一基站覆盖下的区域几率不大，因此，GSM公网对亍基站在Abis 接口传输断链情况下提供业务的需求不是很迫切。 Loss, and due to regional characteristics GSM public network service does not exist, the object i.e., users generally want to call its in the region of the same base cover and is not likely, therefore, GSM public network to the right foot base station provides at Abis interface transmission chain scission case business needs is not very urgent. 而像集群业务这样的特殊业务由于存在明显的区域特征，即用户要呼叫的对象与其在同一基站覆盖下的区域几率较大，往往在某个区域内有效，如：某些部门集群业务很可能仅限于某个或某几个基站覆盖的区域，集群部门业务的可获得性直接关系到集群部门业务的正常开展， 一旦业务间断，可能会造成不可挽回的损失。 And the object image trunking service such as special service due to its large area characterized in that the user wants to call its in the region of the probability of the same base station covering the larger, often effective in a certain area, such as: some sectors trunking service is likely area in one or a few base station coverage is limited, the availability of a direct relationship between the cluster sector operations to the normal development of the cluster sector operations, once the service interruption may cause irreparable damage. 因此，如何使基站在传输断链情况下仍然能够为像集群业务这样的对网络服务质量要求较高的业务提供基本的通信保障，从而保证集群部门工作的正常开展是一个急待解决的问题。 So, how to make the base station is still able to provide basic communications protection as trunking service such as network quality of service demanding business in the transport chain scission case, in order to ensure the normal development of the cluster sector is a pressing problem. 发明内容有鉴于此，本发明的主要目的在于提供一种孤站点对点呼叫的实现方法，实现孤站中移动台之间的点对点业务呼叫，使基站即使在传输断链的情况下，仍然能够提供基本通信业务。 SUMMARY OF THE INVENTION Accordingly, the main object of the present invention to provide a method for implementing a solitary point to point call, point to point service call between a lone stations the mobile station that the base station even in the transmission chain scission case still provide substantially communication services. 本发明提供的一种孤站点对点呼叫的实现方法，在基站中设置其所辖服务小区内移动台的移动台号码和用户标识的对应关系表，并包括以下步骤：a) 基站广播进入孤站运行模式的系统消息，主叫移动台向基站发送包含有被叫移动台号码的层三点对点业务呼叫请求消息；b) 基站收到层三点对点业务呼叫请求消息后，通过移动台号码和用户标识的对应关系表查询当前被叫移动台号码对应的用户标识；c) 基站在其所辖服务小区内广播包含有当前用户标识的寻呼消息；d) 移动台收到寻呼消息后，判断该寻呼消息中的用户标识是否为自身的用户标识，如果是，则移动台向基站发送包含有自身用户标识的寻呼响应业务请求消息，进入步骤e)，否则，移动台不作任何响应；e) 基站收到寻呼响应业务请求消息后，根据该消息中提供的用户标识确定请求与该被叫移动 Method for implementing a lone station of the present invention to provide point to point call set correspondence table of the mobile station number and user identification of the mobile station within its jurisdiction serving cell in a base station, and includes the following steps: a) the base station broadcasts into the lone station system message operation mode, the calling mobile station transmits a base station with a layer called mobile station number of the three-point service call request message; b) after the base station receives a layer three-point service call request message, the mobile station number and user identification correspondence table query the called mobile subscriber identity station corresponding to the number; c) the base station broadcasts with the current user ID paging message within its jurisdiction serving cell; D) after the mobile station receives the paging message, determining the a user identifier in the paging message whether its own user ID, and if so, the mobile station transmits a base station has its own user identification page in response to a service request message, proceeds to step E), otherwise, the mobile station does not make any response; E ) after the base station receives a paging response to the service request message, according to the user identifier of the message is provided to determine the request for the called mobile and 建立呼叫连接的主叫移动台，基站为主叫和被叫移动台分别分配业务信道，并进行信道接续后，分别向主叫和被叫移动台发送移动台接续成功的通知消息。 After establishing a call connection to the originating mobile station, the base station calling and called mobile stations are assigned traffic channel, and a channel connection, each message calling and called mobile station sends the mobile station connection success notification to. 该方法所述步骤a)前进一步包括：基站实时检测Abis接口传输，判断是否正常，如果是，则保持网络正常运行模式，否则，基站在BCCH信道上广播进入孤站运行模式的系统消息。 The method according to step a) before further comprising: a base station detected in real time Abis interface transmission, whether or not normal, if so, to maintain normal network operation mode, otherwise, the base station into the system message operation mode solitary station channel broadcast BCCH. 该方法所述基站周期性地广播所述进入孤站运行模式的系统消息。 The method of the base station periodically broadcasts the incoming system message operation mode lone station. 该方法进一步包括移动台位置更新过程：A. 移动台向基站发送包含有自身移动台号码和用户标识的完全层三位置更新业务请求消息；B. 基站将收到的完全层三位置更新业务请求消息中的移动台号码和用户标识保存在所述移动台号码和用户标识对应关系表中；C. 基站向该移动台返回位置更新接受消息。 The method further includes a mobile station location update procedure: A mobile station to the base station transmits with the own mobile complete layer station number and user identification, three-position update service request message; B base station entirely layer receives three location update service request. message in the mobile station number and user identification stored in the mobile station number and the user identifier correspondence table;. C base station to the mobile station returns a location update accept message. 该方法步骤A所述移动台发送所述完全层三位置更新业务请求消息的同时进一步包括：移动台启动孤站运行模式位置更新定时器；如果孤站运行模式位置更新定时器超时后，移动台仍未收到基站返回的所述位置更新接受消息，则返回步骤A。 Step A by the mobile station transmits the complete layer three location update service request message and further comprising: a mobile station starts a lone station operating mode location update timer; if solitary stations operating mode location update timer expires, the mobile station not received the location update base station returns accept message, then returns to step A. 该方法所述位置更新过程是在移动台进入孤站运行模式的初始阶段进行， 和/或在进入孤站运行模式后周期性进行。 The method of the location update process is carried out at the mobile station enters a lone station mode of operation an initial stage, and / or periodically after entering solitary station mode of operation. 该方法步骤b)所述查找当前被叫移动台号码对应用户标识的过程进一步包括，判断是否找到，如果是，则向主叫移动台返回呼叫请求确认消息，进入步骤c)，否则，向主叫移动台返回呼叫请求拒绝消息，结束流程。 The method step b) the discovery process is currently called mobile station number corresponding to the user identification further comprises determining whether to find, if yes, the calling mobile station sends the call request acknowledgment message, it proceeds to step C), otherwise, the main called mobile station returns a call request rejection message, the process ends. 该方法步骤c)所述基站向移动台广播寻呼消息的同时进一步包括：基站启动孤站运行模式寻呼响应定时器；如果孤站运行模式寻呼响应定时器超时后，基站仍未收到所述被叫移动台返回的寻呼响应业务请求消息，则基站向主叫移动台发送呼叫请求拒绝消息。 The method step c) the base station to mobile stations broadcast paging messages and further comprising: a base station starts solitary stations operating mode paging response timer; if solitary stations operating mode paging response timer expires, the base station has not yet received the called mobile paging response returned by the service request message, the base station transmits a call request rejection message to the calling mobile station.
该方法步骤a)所述移动台发送层三点对点业务呼叫请求消息前进一步包括：主叫移动台进行信道接入过程；步骤d)所述被叫移动台向基站发送寻呼响应业务请求消息前进一步包括： 被叫移动台进行信道接入过程。 Before the method step a) the mobile station transmits a layer three-point service call request message further comprises: the originating mobile station channel access procedure; step d) of the called mobile station sends a page to the base station in response to the service request message prior to further comprising: the called mobile station channel access procedure. 该方法所述主叫移动台接入的业务信道和被叫移动台接入的业务信道采用相同的信道模式。 A traffic channel which the calling mobile station access to traffic channels and the called mobile station to access the same channel mode. 该方法步骤d)所述移动台向基站发送包含有自身用户标识的寻呼响应业务请求消息前进一步包括：移动台向基站发送寻呼响应消息。 The method step d) the mobile station transmits with its own user identification page to the base station in response to service before the request message further comprises: the mobile station sends a paging response message to the base station. 该方法步骤e)所述基站根据寻呼响应业务请求消息提供的用户标识确定请求与该被叫移动台建立呼叫连接的主叫移动台的过程具体包括：基站在所述移动台号码和用户标识对应关系表中查找当前被叫用户标识对应的移动台号码，根据该移动台号码确定请求与该被叫移动台建立呼叫连接的主叫移动台。 The method step e) the base station according to the paging response to the service request the user identification information provided by the determination request establishment procedure calling mobile station a call connection with the called mobile station comprises: a base station at the mobile station number and a user identification correspondence table to find the mobile station number of the current called user ID corresponding to the mobile station number is determined that the request to establish the calling mobile station a call connection with the called mobile station in accordance with. 该方法步骤e)所述基站向主叫和被叫移动台发送的移动台接续成功通知消息为CONNECT消息。 Mobile station in the method step e) the base station transmits to the calling and called mobile station connection success notification message CONNECT message. 该方法步骤e)后进一步包括：移动台收到所述CONNECT消息后，向用户发送可以开始讲话的提示信息。 This process step e) After further comprising: after the mobile station receives the CONNECT message, it sends an alert message may start to speak to the user. 该方法所述移动台号码为移动台国际ISDN号码MSISDN,所述用户标识为IMSI或经过一定转换后的标识码。 The method of the mobile station number is a Mobile Station International ISDN Number MSISDN, the user ID is an identification code IMSI or after a certain after conversion. 从上面所述可以看出，本发明提供的孤站点对点呼叫的实现方法，通过在基站中建立移动台的移动台国际ISDN号码（MSISDN)和国际移动用户标识（IMSI)对应关系，并由基站根据呼叫请求建立主叫和被叫移动台之间的点对点信道接续等技术手段，实现了孤站情况下的点对点呼叫。 As can be seen from the above, the implementation solitary point to point according to the present invention provides a call by establishing a mobile station international ISDN number of the mobile station (MSISDN) in the base station and the international mobile subscriber identity (IMSI) corresponding relation, by the base station establishing point channel between the calling and the called mobile station connection and other technical means according to the call request, to achieve point to point call in solitary stop situation. 从而提供了一种新的基站工作模式，使基站在Abis接口传输中断的情况下，仍然能够提供点对点的基本通信业务。 Thereby providing a new base station mode of operation, so that the base station in the case where the Abis interface transmission interruptions still provide point basic communication services. 使集群部门业务这一类对网络服务质量有特殊要求的业务，不会因为该基站Abis接口传输问题而完全中断，保证集群部门工作的正常开展，避免了业务中断带来的损失。 The cluster sector businesses in this category have special requirements for network quality of service business, not because of the base station interface transfer problem Abis completely interrupted to ensure the normal development of the cluster sector, to avoid the loss of business interruption caused.
附图说明图1为本发明实施例的位置更新过程示意图；图2为本发明实施例集群业务孤站点对点呼叫过程示意图。 BRIEF DESCRIPTION location update procedure of FIG. 1 of the present invention, an embodiment of a schematic diagram; FIG. 2 is a schematic embodiment of a trunking service solitary point to point call process embodiment of the present invention. 具体实施方式下面结合附图及具体实施例对本发明再作进一步详细的说明。 Specific embodiments of the present disclosure is further described in detail specific embodiments below in conjunction with the accompanying drawings and. 本发明的思路是为基站提供两种运行模式：网络运行模式和孤站运行模式。 Idea of the present invention is to provide two modes of operation of the base station: the network operation mode and isolated stations operating mode. 基站对其Abis接口传输保持不断的检测，并根据检测到的Abis接口传输状态确定本基站的当前运行模式，当基站Abis接口传输正常时，基站处于网络运行模式，提供正常的业务；当基站Abis接口传输断链时，基站切换为孤站运行模式，提供最为基本的点对点通信业务，另外还可以提供其它业务，其它业务不在本发明描述之列。 The base station Abis interface transmission thereof held constant detection, and determines the current operating mode of the base station according to the Abis interface transmission state detected when the base station Abis interface normal transmission, a base station in the network operation mode, to provide normal service; when the base station Abis when the interface transmission chain scission, the base station handover is a lone station mode of operation, to provide the most basic point to point communication services, also can provide other services, other services are not according to the present invention are shown of description. 基本点对点通信业务的实现方案为在孤站运行模式下，移动台通过发起位置更新流程，给基站提供自身移动台号码和用户标识信息，基站中保持本基站覆盖范围内的所有移动台号码和其用户标识对应关系表；当需要进行点对点呼叫时，基站通过移动台上报的被叫移动台号码信息，查询存储的移动台号码和其用户标识对应关系信息表，得到被叫的用户标识信息，并通过在本基站所有服务小区中发起用户标识寻呼方式的寻呼过程，建立点对点的呼叫接续。 Implementation basic point communication service is in solitary station operating mode, mobile station initiates a location update procedure, to the base station that provides its own mobile station number and the user identification information, to keep all mobile stations numbers within the present coverage of base stations and their base station user identifier correspondence table; when it is desired point to point call, the base station by a mobile station reported by the called mobile station number information, query the storage of the mobile station number and other user corresponding to the identification information table, to give the called user identification information, and by initiating a paging procedure user identity paging system in the base station all the serving cells, the establishment of point to point call connection. 其中，所述移动台号码为MSISDN，所述用户标识为IMSI或经过一定转换后的标识码，转换标识码和IMSI码具有——对应关系，且网络侧和移动台侧采用相同的转换方式。 Wherein the mobile station number is the MSISDN, the subscriber identity is IMSI or through the identification code after a certain conversion, conversion identification code and the IMSI code having - a correspondence relationship, and the network side and the mobile station-side the same conversion. 参见图1、图2所示，以基于GSM数字集群系统的孤站点对点呼叫为例，对本发明方案进行详细说明。 Referring to Figure 1, shown, lone station GSM based digital trunking system point call as an example in FIG. 2, of the embodiment of the present invention will be described in detail. 参见图1所示，本发明在基站内部保存的MSISDN和IMSI对应关系表， 通常，当基站进入孤站运行模式的初始阶段需要对该对应关系表进行更新， 其具体过程如下： Referring to FIG. 1, the present invention is stored in the interior of the base station MSISDN and IMSI correspondence table, typically, when the base station enters the solitary station mode of operation an initial stage needs to update the correspondence table, the specific process is as follows:
步骤IOI,基站检测Abis接口传输，当检测到传输断链，基站进入孤站运行模式。 Step IOI, the base station detects Abis interface transmission, when the transmission is detected scission, the base station enters the solitary station mode of operation. 步骤102，基站在BCCH信道上广播系统消息，通知移动台已进入孤站运行模式，该系统消息在BCCH信道上进行周期性的广播。 Step 102, the base station on the BCCH channel broadcast system messages informing the mobile station has entered solitary station mode of operation, the system message periodically broadcast on the BCCH channel. 步骤103，移动台收到该BCCH信道上的表明基站处于孤站运行模式的系统消息后，移动台进入孤站运行模式。 After step 103, the mobile station receives the BCCH channel indicates that the base station is in a system message operation mode solitary station, the mobile station enters a lone station mode of operation. 由于移动台位置变化等原因，基站所辖服务区内移动台的数目和信息经常发生改变，因此需要及时更新MSISDN和IMSI对应关系表，以下为位置更新过程：步骤104，移动台发起位置更新流程，即通过完全层三位置更新业务请求消息向基站发起位置更新请求，在该消息中向基站提供IMSI和MSISDN 信息，并同时启动孤站运行模式位置更新定时器。 Due to mobile station location changes, the number and the information of the base station under the jurisdiction of the service area of the mobile station frequently changes, it is necessary to update the MSISDN and IMSI correspondence table, the following is a location update process: Step 104, the mobile station initiates a location update procedure , i.e. a request by the three-position fully layer update service message initiates a location update request to the base station, providing the IMSI and MSISDN information to the base station in the message, and simultaneously start the solitary station operating mode location update timer. 步骤105,基站从收到的完全层三位置更新业务请求消息中取出IMSI 信息和MSISDN信息，保存在MSISDN和IMSI对应关系表中。 Step 105, the base station from the received complete layer IMSI information and MSISDN information message extracted three location update service request, is stored in MSISDN and IMSI correspondence table. 步骤106，基站给移动台发送位置更新接受消息，确认位置更新成功， 位置更新过程结束。 Step 106, the base station to the mobile station sends a location update accept message confirming the location update is successful, the end of the location update procedure. 如果移动台在孤站运行模式位置更新定时器超时之前仍然收不到基站返回的位置更新确认消息，则延迟一段时间后，再次发起位置更新过程，即重复执行步骤104 ~ 106。 If the mobile station to update timer solitary station operating mode position timeout still received before a position short of the base station returns the update confirm message, then after a delay, again initiates a location update process, i.e. repeating steps 104 to 106. 由于基站所辖移动台数目较多，在进行位置更新时可能会经常发生碰撞的情况，造成一些移动台的位置更新请求无法被及时处理，因此，这里需要这些移动台延迟一段时间后，再次发起位置更新过程。 Situation due to the larger number of base stations under the jurisdiction of the mobile station may collision will occur frequently during location update, resulting in the location update request some of the mobile station can not be in time, therefore, there is need for the mobile stations a time delay, launch again location update process. 并且，为了减小移动台位置更新请求碰撞的发生几率，可以设置所延迟的一段时间不固定，使该延迟时间通过一定的算法随机产生。 Further, in order to reduce mobile station position update the probability of occurrence of the request collision, may be provided as a delay period of time is not fixed, so that the delay time through a certain algorithm randomly generated. 另外，后续进入该基站覆盖范围内的移动台，接收BCCH信道上周期性广播的孤站运行系统消息后，也需发起位置更新过程，给基站提供IMSI和MSISDN信息。 After the addition, the follow-up into the mobile station within the coverage of base stations, receiving a lone station operating system message BCCH channel periodically broadcasts, but also needs to initiate a location update process, providing the IMSI and MSISDN information to the base station.
上面所述位置更新过程是在移动台进入孤站运行模式后的初始阶段，以及孤站运行模式位置更新定时器超时后发起的后续位置更新过程。 Above the location update process is an initial stage after the mobile station enters a lone station mode of operation, and the isolated station operation mode location update timer is initiated after the timeout subsequent location update procedure. 除此以外，为了使基站内部的MSISDN和IMSI对应关系表得到及时和可靠的更新， 还可以要求移动台周期性地发起位置更新过程。 In addition, in order to MSISDN the interior of the base stations and IMSI mapping table to obtain timely and reliable updated, may also require the mobile station to periodically initiate a location update procedure. 参见图2所示，在孤站运行模式下，移动台可以发起点对点呼叫，其具体过程如下：步骤201,移动台发起点对点呼叫，即在完成信道接入后，移动台向基站发送层三点对点业务请求消息，该消息中携带有被叫用户的MSISDN号码。 Referring to FIG. 2, in the solitary station operating mode, the mobile station may initiate point call, the specific process is as follows: Step 201, the mobile station initiates point call, i.e. after the completion of the channel access, the mobile station to the base station transmission layer three point a service request message, the message carries the called subscriber's MSISDN number. 其中，这里信道接入过程与GSM系统的现有信道接入过程相同。 Wherein, the same conventional channel access where a channel access procedure with the GSM system process. 步骤202，基站收到层三点对点业务请求消息后，根据消息中被叫用户的MSISDN号码查询本地MSISDN和IMSI对应关系表，如果对应关系表中存在被叫的MSISDN号码，则可以得到该号码对应的IMSI信息，向发送请求消息的主叫移动台发送呼叫请求确认消息；否则，如果基站所存储的MSISDN和IMSI对应关系表中没有该MSISDN号码，则直接给主叫移动台发送呼叫业务请求拒绝消息，结束流程。 Step 202, the base station receives a layer three-point service request message, in the message to the called subscriber's MSISDN number query local MSISDN and IMSI correspondence table, if the corresponding MSISDN number of the called presence of relational tables, it is possible to obtain the number corresponding to the IMSI information, the calling mobile station request message to the sender transmits a call request acknowledgment message; otherwise, if the base station of the stored MSISDN and IMSI correspondence table is not the MSISDN number, directly sends a call service request rejection to the calling mobile station news, the end of the process. 步骤203,基站发起寻呼过程，即向基站所有服务小区的移动台广播携带有被叫IMSI信息的寻呼消息，并启动孤站运行模式寻呼响应定时器。 Step 203, the base station initiates a paging procedure, namely a mobile station broadcasting station all serving cells carrying the called IMSI information of the paging message, and initiates a lone stations operating mode paging response timer. 步骤204，移动台收到寻呼消息后，对消息中携带的IMSI进行检测， 判断该IMSI是否为本移动台的IMSI,如果是，则移动台完成信道接入后向基站发送寻呼响应，进入步骤205;否则，如果移动台检测到该寻呼消息不是针对本移动台，则移动台不作任何响应。 Step 204, after the mobile station receives the paging message, the message carries the IMSI is detected, determines the IMSI whether the mobile station IMSI present, sends a paging response to the base station If yes, then the mobile station to complete the channel access, proceeds to step 205; otherwise, if the mobile station detects the paging message is not for this mobile station, the mobile station does not make any response. 其中，这里移动台发送寻呼响应前的信道接入过程与现有GSM系统规定的过程相同.步骤205，该被叫移动台向网络侧进一步发送携带有本移动台IMSI的寻呼响应业务请求消息。 Wherein, where the mobile same procedure channel access procedure before the station sends a paging response to a predetermined with existing GSM system. Step 205, the called mobile station further transmits to the network side carrying the present mobile station IMSI paging response to the service request messages.
步骤206，基站收到被叫移动台发来的寻呼响应业务请求消息后，通过该被叫提供的IMSI信息，并结合主叫提供的被叫MSISDN信息以及本地存储的MSISDN和IMSI对应关系表，确定请求与该被叫建立呼叫连接的主叫， 即基站在MSISDN和IMSI对应关系表中反向查找当前被叫IMSI对应的被叫MSISDN,再根据该被叫的MSISDN找到需要与其建立连接的主叫；在此以后，基站给主叫和被叫分配业务信道。 Step 206, the base station receives the called mobile station sent the paging response IMSI information of the service request message, by which the called party provides, in combination with the called MSISDN information and the locally stored MSISDN caller provided and IMSI correspondence table , determining that the request to establish the caller's call connection to the called party, i.e., the base station MSISDN and IMSI correspondence table in a reverse lookup currently called IMSI of the called number MSISDN, and then to find the called MSISDN of the need to connect to it to calling; after this, the base station to the caller and the called party assigns a traffic channel. 其中，此时，主叫业务信道和被叫业务信道一定要釆用相同的信道模式， 如果主叫移动台和被叫移动台在信道接入阶段采用的是现有技术的极早指配规程，则基站给主叫和被叫分配业务信道时，执行模式修改规程。 Wherein, at this time, calling service channel and a called traffic channel must preclude the use of the same channel mode, if the calling mobile station and a called mobile station to use the channel access phase is very early assignment procedure prior art when, the base station to the calling and called traffic channel is assigned, execution mode modify procedure. 步骤207,基站完成主叫上行信道到被叫下行信道，以及主叫下行信道到被叫上行信道的接续。 Step 207, the base station is completed calling uplink channel to the called downlink channel, and calling a downlink channel to connecting the called uplink channel. 其中，如果上、下行信道接续是在Abis接口进行，则基站需要完成对Abis接口上、下行信道不对称性的处理，具体处理方式依赖与基站厂商的具体实现规定。 Wherein, if the downlink channel connection is an interface in Abis, the base station need to complete on the Abis interface, asymmetry of downlink channel processing, specific processing-dependent manner with the base station vendor specific implementation requirements. 步骤208,基站完成接续后，给主叫移动台和被叫移动台发送CONNECT 消息，通知该两个移动台接续成功；主叫移动台和被叫移动台收到该消息后， 可以给出可闻的提示，指示主叫和被叫用户可以开始讲话。 Step 208, after the base station is completed connection, to the calling mobile station and a called mobile station sends the CONNECT message to notify the two mobile stations subsequent successful; after the originating mobile station and a called mobile station receives the message, it can compute Wen tips, indicating the calling and the called user can begin speaking. 如果在孤站运行模式寻呼响应定时器超时后，基站仍没有收到被叫移动台返回的寻呼响应，则基站给主叫移动台发送呼叫请求拒绝消息。 If the paging response timer expires solitary station mode of operation, the base station does not receive the called mobile paging response station returns the base station to the calling mobile station sends a call request rejection message. 本领域技术人员不难看出，本发明不应仅局限于GSM数字集群系统， 还可以同样适用于如：GSM公网等其它类似数字蜂窝系统，或其它类似情况。 Those skilled in the art will readily be seen that the present invention should not be limited to GSM digital trunking system, may also be equally applicable to such as: GSM public network, and other similar digital cellular systems, or other similar circumstances. 以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。 The above preferred embodiments of the present invention only but are not intended to limit the present invention, any modifications within the spirit and principle of the present invention, the, equivalent replacement, or improvement, should be included in the present invention. within the scope of protection.