WO2011066801A1 - 一种小流量无线数据传输的方法和基站系统 - Google Patents

一种小流量无线数据传输的方法和基站系统 Download PDF

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Publication number
WO2011066801A1
WO2011066801A1 PCT/CN2010/079396 CN2010079396W WO2011066801A1 WO 2011066801 A1 WO2011066801 A1 WO 2011066801A1 CN 2010079396 W CN2010079396 W CN 2010079396W WO 2011066801 A1 WO2011066801 A1 WO 2011066801A1
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Prior art keywords
terminal
sdb
access cell
core network
paging
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PCT/CN2010/079396
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English (en)
French (fr)
Inventor
徐维江
韩桂鲁
杨宝国
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中兴通讯股份有限公司
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Publication of WO2011066801A1 publication Critical patent/WO2011066801A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices

Definitions

  • the invention relates to a method and a base station system for small-flow wireless data transmission, in particular to a small-flow wireless data transmission method and a base station system in a short data burst (SDB) mode data service.
  • SDB short data burst
  • SDB short data burst
  • the data service process of the SDB mode is divided into a calling and called process, and the main called party has two processes of a control channel SDB and a service channel SDB, respectively. Since it is not necessary to establish a private traffic channel for each user in the control channel SDB mode, all users can transmit service information through the shared control channel, thereby greatly improving the utilization of channel unit resources, and solving the problem of network resource occupation. It also meets the characteristics of small traffic data.
  • the main and called control channel SDB flow is shown in Figure 1 and Figure 2.
  • the flow of the SDB mode data service flow in the air interface between the base station and the terminal is similar to the short message flow.
  • the process of the A interface between the base station and the core network has a data service flow. This feature determines that this small-flow wireless data service is more suitable for use in scenarios where data reporting frequency is high, single-time reporting data is small, transmission reliability and data security requirements are not high, such as on-board shipborne global positioning system ( Global Positioning System, GPS) Positioning business.
  • GPS Global Positioning System
  • a Packet Data Serving Node (PDSN) and a Packet Control Function (PCF) paging terminal are completed through a called control channel SDB process, where the base station system
  • the service request is sent to the core network, and the purpose is to request the core network to notify the air interface of the paging range, and to page the terminal according to the obtained Location Area Code (LAC).
  • LAC Location Area Code
  • the terminal reports the location location to the PCF and the PDSN. It is implemented by the calling control channel SDB process.
  • control channel SDB process When the control channel SDB process is applied to small traffic, high frequency, and mobility data services such as on-board GPS positioning services, the positioning terminal needs to reply to the core network after the location information request is reported, and the core network sends a control command or prompt. Information is very frequent. In this way, the called control channel SDB process, that is, the network forward response, has two problems to be solved:
  • the A interface that is, the signaling interface between the base station and the core network, has large signaling traffic.
  • a base station system BS
  • MSC Mobile Switching Center
  • the BS needs to send an authentication request message to the MSC and receive an authentication response message of the MSC. Due to the high frequency of the data service, the reporting and response time intervals are relatively short. If a large number of terminals in a network are performing such services, the impact on the A-interface signaling link load is large.
  • the air interface that is, the signaling interface between the base station and the terminal, has a heavy paging channel load.
  • the purpose of the base station sending a service request to the core network is to obtain a paging range, such as a location area (LAC).
  • LAC location area
  • the location area is a group of cells, and the range of location area planning can be large or small.
  • a SDB mode data service page will be sent to all cells in a LAC.
  • the amount of paging messages on the air interface is very large, and the paging channel is easily overloaded. Summary of the invention
  • the technical problem to be solved by the present invention is to provide a method for d, traffic wireless data transmission service and a base station system, which solves the problem of large load of the A interface signaling link in the data service of the SDB mode.
  • the present invention provides a small-flow wireless data transmission method, which is applied to a control channel short data burst (SDB) mode data service, and the method includes:
  • the core network, the base station system (BS), and the terminal first perform the control channel SDB called flow and the calling process, and the BS receives the SDB call sent by the terminal.
  • the BS After the message, storing the current access cell information of the terminal carried in the message; and in the control channel SDB called flow and calling process performed after the control channel SDB called flow and calling process
  • the BS When the BS stores the access cell information locally, the BS directly determines a paging range for the terminal according to the access cell information, and updates the storage after receiving the SDB call message sent by the terminal.
  • the current access cell information of the terminal is storing the current access cell information of the terminal carried in the message; and in the control channel SDB called flow and calling process performed after the control channel SDB called flow and calling process.
  • the data service is a GPS positioning service.
  • the method further includes: after the data service starts, when the BS receives the data service request sent by the core network for the first time, the BS requests a paging range from the core network according to the called control channel SDB process, and the core network Returning to the current location area of the terminal, the BS initiates an SDB page to the terminal by using the location area as a paging range.
  • the method further includes: the data service is performed periodically;
  • the BS After receiving the SDB call message of the terminal, the BS starts a timer for the terminal, where the timer duration is greater than the data service timing duration, and the BS receives the timer before the timer expires.
  • the paging range of the terminal is directly determined according to the stored access cell information, and the timer is stopped; after receiving the SDB call message of the terminal, And the BS updates the stored access cell information, and restarts the timer; if the timer expires, the BS deletes the stored access cell information.
  • the method further includes: after the BS deletes the stored access cell information, if the data service request sent by the core network is received again, the paging range is obtained from the core network, and the terminal is searched for After receiving the message of the SDB call initiated by the terminal, the call is transparently transmitted to the core network, and the current access cell information of the terminal is re-stored.
  • the invention also provides a base station system, comprising an A interface, an air interface, a paging processing module, a call processing module, a storage module and a timing maintenance module, wherein:
  • the A interface is a signaling interface between the BS and the core network, and the air interface is an interface between the BS and the terminal;
  • the paging processing module is configured to: receive the data industry of the SDB mode sent by the core network through the A interface. After the request is received, the terminal that is to be paged by the timing maintenance module is notified, and the location information of the terminal is obtained from the storage module or the location information of the terminal is obtained from the core network through the A interface, and the paging range is determined according to the location information. Initiating a page to the terminal over an air interface;
  • the call processing module is configured to: after receiving the SDB call message sent by the terminal through the air interface, save the access cell information in the message to the storage module or update the original access cell information of the storage module, and notify at the same time
  • the terminal of the timing maintenance module initiates an SDB call
  • the storage module is configured to: save the access cell information of the terminal;
  • the timer maintenance module is configured to: start a timer after receiving the notification that the terminal initiates the SDB call, and stop receiving the timer after receiving the notification of the terminal that the paging processing module needs to page, when the timing is After the device times out, the access cell information of the terminal in the storage mode is deleted.
  • the data service is periodically performed, and the timer duration is greater than the data service timing duration.
  • the paging processing module is further configured to: after receiving the data service request of the SDB mode sent by the core network through the A interface, determine, for each terminal to be paged, whether the storage module stores the access cell of the terminal Information, if yes, determining a paging range according to the access cell, and initiating paging to the terminal by using an air interface, otherwise obtaining a location area of the terminal from a core network, and using the location area as a paging range, The air interface initiates a page to the terminal.
  • the method and system of the above solution can better solve the paging problem of data service with small traffic, high frequency and mobility.
  • the base station system can store the terminal accessing the cell, and only when the core network initiates the data service request in the SDB mode for the first time, query the core network for a paging range, and then each time the core network initiates the SDB data service request during the service progress, The base station system does not need to request the paging range from the core network, which reduces the load of the A interface signaling link. Further, the base station system may send the SDB paging to the terminal only by using the terminal access cell and its neighboring cell as the paging range, and the range is much smaller than the commonly planned LAC location area, which reduces the load of the air interface paging channel.
  • the base station system can temporarily store the access cell information of the active user by setting a timer.
  • the base station system deletes the cell of the terminal in time, and does not occupy too much. Static resources.
  • FIG. 1 is a flowchart of the SDB control channel
  • FIG. 2 is a flow chart of the called control channel SDB
  • Figure 3 is a flow chart of the GPS positioning service
  • FIG. 4 is a block diagram of a base station system according to an embodiment of the present invention.
  • FIG. 5 is a flowchart of an SDB mode data service according to an embodiment of the present invention.
  • FIG. 6 is a flow chart of applying to a GPS service according to an embodiment of the present invention.
  • the system on which the embodiment is based includes a core network, a base station system, and a terminal, wherein the functions of the core network and the terminal can be unchanged, and the functions of the base station system are upgraded.
  • the base station system includes: an A interface, an air interface, a paging processing module, a call processing module, a storage module, and a timing maintenance module, where:
  • the A interface is the signaling interface between the BS and the core network
  • the air interface is the interface between the BS and the terminal.
  • the paging processing module is configured to notify the terminal that the timing maintenance module needs to page after receiving the data service request of the SDB mode sent by the core network through the A interface, and obtain the location information of the terminal from the storage module or to the core through the A interface.
  • the network acquires location information of the terminal, determines a paging range according to the location information, and initiates paging to the terminal through the air interface.
  • the call processing module is configured to: after receiving the SDB call message sent by the terminal through the air interface, save the access cell information in the message to the storage module or update the original access cell information of the storage module, and notify the scheduled maintenance module.
  • the terminal initiates an SDB call.
  • the storage module is configured to save the access cell information of the terminal.
  • the timer maintenance module is configured to start a timer after receiving the notification that the terminal initiates the SDB call, and receive the timer. After the paging processing module notifies the terminal to be paged, the timer is stopped. When the timer expires, the access cell information of the terminal in the storage module is deleted. The duration of the above timer is greater than the duration of the data service.
  • the paging processing module determines, for each terminal to be paged, whether the storage module stores the access cell information of the terminal, and if so, Determining the paging range according to the access cell, and initiating paging to the terminal through the air interface, otherwise obtaining the location area of the terminal from the core network, using the location area as a paging range, and initiating paging to the terminal through the air interface.
  • the paging range is determined according to the access cell
  • the access cell of the terminal and its neighboring cell are used as the paging range.
  • the location area where the access cell is located may also be used as the paging range. Especially in the scene where the terminal is moving at high speed.
  • the timing maintenance module is optional.
  • the access cell information can also be deleted after the service ends.
  • Step 201 The core network sends an SDB mode data service request to the BS.
  • Step 202 After receiving the request, the paging processing module of the BS queries the storage module, and finds that the access cell information of the terminal is not included in the storage module, and sends the information to the core network through the A interface according to the called control channel SDB process.
  • the message requests a paging range, and the message includes an international mobile subscriber identity IMSI of the terminal;
  • Step 203 The core network determines the location area of the terminal according to the IMSI number of the terminal, and returns a message to the BS for paging range notification, where the message includes the current location area of the terminal;
  • Step 204 The paging processing module of the BS receives the location area returned by step 203 through the A interface, determines a paging range according to the location area, and performs SDB paging to the terminal through the air interface.
  • Step 205 The terminal sends a message to the BS to perform an SDB call, where the message includes the current access cell of the terminal, and the call processing module receives the SDB call message of the terminal through the air interface, and the access cell in the message
  • the information is saved to the storage module, and the timing maintenance module is notified to initiate the SDB call, and the timing maintenance module starts a timer for the terminal, and the timer is longer than the core network.
  • the SDB mode data service request period is long, and the originating call processing module forwards the SDB call message to the core network through the A interface, and returns the SDB mode data service response.
  • Step 206 Before the timer expires, the BS receives the SDB mode data service request sent by the core network again.
  • Step 207 After receiving the request by the A interface, the paging processing module of the BS notifies the terminal that the timing maintenance module needs to page, and the timing maintenance module stops the timer of the terminal, and the paging processing module determines that the storage module saves the The access cell information of the terminal, the access cell of the terminal is taken out, and the neighboring cell of the cell stored in the local database is combined to form a paging cell group, and the paging cell group is initiated to initiate SDB paging to the terminal through the air interface;
  • Step 208 The terminal sends a message to the BS to perform an SDB call, carrying the current access cell of the terminal, and the BS call processing module receives the SDB call message through the air interface, and updates the original access cell of the terminal in the storage module. And notifying the timing maintenance module that the terminal initiates the SDB call, and the timing maintenance module re-starts a timer for the terminal, and the call processing module forwards the SDB call message to the core network through the A interface, and returns the SDB mode data service response;
  • update the recorded access cell of the terminal refers to a process of ensuring that the stored access cell is consistent with the access cell in the originating message, and the update processing may be to start the SDB in a specific operation.
  • the access cell in the message directly replaces the originally stored access cell, and may also compare whether the access cell in the SDB call message is the same as the recorded access cell, and replace the stored access cell at different times. information.
  • Step 209 If the timer expires and the BS does not receive the SDB mode data service request sent by the core network, the timing maintenance module deletes the access cell information of the terminal in the storage module.
  • FIG. 6 it is an application example of the present invention applied to the GPS positioning service.
  • the requesting GPS terminal to report the location location message is sent by the A9 short data transmission message in the called control channel SDB process, and the paging range is requested. It is sent by the A1BS service request message.
  • the MSC notifies that the paging range is notified by the ADDS paging message.
  • the BS reports the location of the GPS terminal to the PCF through the A9 short data transmission message in the call control channel SDB process.
  • the figure only includes the main messages in the SDB process of the primary and called control channels, but this solution is applied to the GPS positioning service.
  • the implementation also includes related messages in the main called control channel SDB flow.
  • the application of the invention to the GPS positioning service comprises the following steps:
  • Step 301 The PDSN sends a message to the BS through the PCF to request the GPS terminal to report the location location information.
  • Step 302 The BS sends a message requesting paging range to the MSC according to the International Mobile Subscriber Identity (IMSSI) number of the GPS terminal, and queries the registration location area of the GPS terminal user.
  • IMSSI International Mobile Subscriber Identity
  • Step 303 The MSC accesses the VLR or the HLR to obtain a location area where the GPS terminal is located, and notifies the BS of the range of the paging.
  • Step 304 The BS initiates an SDB paging to the GPS terminal according to the paging range obtained in step 303.
  • Step 305 After receiving the SDB page, the GPS terminal performs the positioning service processing, and then initiates the SDB call to report the location location information to the BS.
  • the BS reports the GPS terminal location location information of the GPS terminal to the PCF.
  • the BS stores the access cell of the current calling, and starts the timer Trecordposition.
  • the GPS positioning service is generally performed periodically, and the duration of the timer Trecordposition is longer than the time interval of the GPS positioning service by 2 seconds;
  • Step 306 If the BS receives the PCF sending message and requests the GPS terminal to report the location location information before the timer Trecordposition times out, stop the timer Trecordposition, and take out the stored cell that the GPS terminal accesses last time, and save the combined with the local database. Adjacent cells of the cell form a paging cell group;
  • Step 307 The BS initiates an SDB paging to the GPS terminal according to the paging cell group determined in step 306.
  • Step 308 After receiving the SDB paging, the GPS terminal performs the positioning service processing, and then initiates the SDB call to report the location location information to the BS. After receiving the SDB call message, the BS reports the location information of the GPS terminal to the PCF, and the BS Updating the access cell of the terminal, and restarting the timer Trecordposition;
  • Step 309 If the BS receives the message request and the GPS terminal reports the location location information again before the timer Trecordposition times out, the process is performed according to step 306.
  • Step 310 If the timer Trecordposition times out, no PCF is sent to send a message requesting GPS.
  • the terminal reports the location location information, and the BS deletes the stored access cell information, and does not restart the timer Trecordposition.
  • the BS saves the access cell information of the terminal within the time limit of the timer, and may also use other methods, such as the SSB saves the access cell information of the terminal when the data service starts, and updates the terminal during the service. Access to cell information until the end of the service.
  • the method adopts the improved GPS positioning service as an embodiment, and is not limited to the GPS positioning service.
  • the present invention can be variously modified and modified or applied to other services having similar characteristics. All modifications, equivalents, improvements, etc., made within the spirit and scope of the invention are intended to be included within the scope of the appended claims.
  • the present invention can better solve the paging problem of data services with low flow rate, high frequency and mobility.
  • the base station system can store the terminal accessing the cell, and only when the core network first initiates the data service request in the SDB mode, query the core network for a paging range, and then each time the core network initiates the SDB data service request during the service progress, The base station system does not need to request the paging range from the core network, which reduces the load of the A interface signaling link. Further, the base station system can only send the SDB page to the terminal by using the terminal access cell and its neighboring cell as the paging range. This range is much smaller than the commonly planned LAC location area, which reduces the load of the air interface paging channel.
  • the base station system can temporarily store the access cell information of the active user by setting a timer.
  • the base station system deletes the cell of the terminal in time, and does not occupy too much. Static resources.

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Abstract

本发明公开了一种小流量无线数据传输方法及基站系统。本发明应用于控制信道短数据突发(SDB)模式的数据业务。该方法包括：在述数据业务开始后，核心网、基站系统(BS)和终端先进行一次控制信道SDB被叫流程和主叫流程，且BS在收到终端发送的SDB起呼的消息后，存储该消息中携带的终端当前的接入小区信息；在所述数据业务之后进行的控制信道SDB被叫流程和主叫流程中，BS在本地存储有所述接入小区信息时，直接根据所述接入小区信息确定对所述终端的寻呼范围，在收到所述终端发送的SDB起呼的消息后，更新存储的所述终端当前的接入小区信息。本发明解决了小流量、高频度、移动性强的数据业务A接口信令链路负荷大的问题。

Description

一种小流量无线数据传输的方法和基站系统
技术领域
本发明涉及一种小流量无线数据传输的方法和基站系统， 尤其是短数据 突发 (Short Data Burst, SDB)模式的数据业务中的小流量无线数据传输方法和 基站系统。
背景技术
CDMA2000 lx A接口协议标准 (IOS 5.0.1以上版本)中， 提出了短数据突 发 (SDB)的概念。 SDB模式是专为小流量数据传输而设计的。 网络系统和终 端系统都有一个 SDB 门限参数， 当数据量小于该门限参数时才会触发 SDB 模式。
SDB模式的数据业务流程区分为主叫和被叫流程， 主被叫又分别有控制 信道 SDB和业务信道 SDB两种流程。 由于在控制信道 SDB模式下不需要为 每个用户建立私有的业务信道， 所有用户可以通过共享的控制信道传输业务 信息， 从而大大提高了信道单元资源的利用率， 可以解决网络资源占用的问 题， 也符合小流量数据的特性。 主被叫的控制信道 SDB流程见图 1和图 2。
由流程图可见， SDB模式数据业务流程在基站与终端的空中接口方面的 流程与短消息流程类似， 在基站与核心网的 A接口方面的流程除了短消息流 程外， 还有数据业务的流程， 这种特性决定了这种小流量无线数据业务比较 适用于数据上报频度高， 单次上报数据量小， 传输可靠性和数据安全性要求 不高的使用场景，比如车载船载全球定位系统 (Global Positioning System , GPS) 定位业务。
按照图 3 的传统 GPS 定位业务流程， 分组数据业务节点 (Packet Data Serving Node , PDSN)和分组控制功能 (Packet Control Function, PCF)寻呼终端 是通过被叫控制信道 SDB流程完成的，其中基站系统需向核心网发送服务请 求， 其目的主要是请求核心网通知空中接口的寻呼范围， 根据得到的位置区 (Location Area Code, LAC)寻呼终端。 终端向 PCF和 PDSN上报定位位置是 通过主叫控制信道 SDB流程实现的。
控制信道 SDB流程应用于车载船载 GPS定位业务等小流量、 高频度、 移动性强的数据业务时， 通常定位终端上报位置信息请求后需要核心网回复 应答,核心网应答发送控制命令或提示信息非常频繁。这样被叫控制信道 SDB 流程， 即网络前向应答就存在两个需要解决的问题：
A接口， 即基站与核心网之间的信令接口， 信令流量大。 在小流量、 高 频度、移动性强的数据业务中，每次终端终结业务中，基站系统 (Base Station, BS)需要向移动交换中心 (Mobile Switching Center, MSC)发送寻呼范围请求消 息、 接收 MSC的应答和 MSC发送的寻呼范围通知消息， 并向 MSC返回应 答， 每次终端始发业务中， BS需要向 MSC发送鉴权请求消息并接收 MSC 的鉴权响应消息。 由于该数据业务发生频率高， 上报和应答时间间隔都比较 短， 如果一个网络下有大量终端在进行这种业务， 对 A接口信令链路负荷的 冲击很大。
空中接口， 即基站与终端之间的信令接口， 寻呼信道负荷较重。 基站向 核心网发送服务请求的目的是获取寻呼范围，如位置区 (LAC)。位置区是一组 小区， 位置区规划的范围可以很大也可很小， 目前很多运营商为了提高语音 寻呼响应率， 将位置区划分的范围很大， 甚至几个 BS共用一个 LAC。 一次 SDB模式数据业务寻呼会发往一个 LAC下所有的小区。当网络下有大量的这 种定位终端在进行这种业务时， 空中接口寻呼消息量非常大， 寻呼信道易过 载。 发明内容
本发明所要解决的技术问题是提供一种 d、流量无线数据传输业务的方法 和基站系统， 解决 SDB模式的数据业务中 A接口信令链路负荷大的问题。
为了解决上述问题， 本发明提供了一种小流量无线数据传输方法， 应用 于控制信道短数据突发 (SDB)模式的数据业务， 所述方法包括：
在所述数据业务开始后， 核心网、 基站系统 (BS)和终端先进行一次控制 信道 SDB被叫流程和主叫流程，且所述 BS在收到所述终端发送的 SDB起呼 消息后， 存储所述消息中携带的所述终端当前的接入小区信息； 以及 在所述控制信道 SDB被叫流程和主叫流程之后进行的控制信道 SDB被 叫流程和主叫流程中， 当所述 BS在本地存储有所述接入小区信息时，直接根 据所述接入小区信息确定对所述终端的寻呼范围， 在收到所述终端发送的 SDB起呼的消息后， 更新存储的所述终端当前的接入小区信息。
所述 BS才艮据所述接入小区信息确定对所述终端的寻呼范围时， 是将所 述接入小区及所述接入小区的邻接小区作为所述终端的寻呼范围。
所述数据业务为 GPS定位业务。
所述方法还包括： 所述数据业务开始后， 所述 BS 第一次收到核心网发 送的所述数据业务请求时， 按照被叫控制信道 SDB流程， 向核心网请求寻呼 范围，核心网返回终端当前所在位置区，所述 BS以该位置区为寻呼范围对所 述终端发起 SDB寻呼。
所述方法还包括： 所述数据业务是定时进行的；
所述 BS收到所述终端的 SDB起呼消息后， 还为所述终端启动定时器， 所述定时器时长大于所述数据业务定时时长，如所述 BS在所述定时器到时前 收到核心网发来的所述数据业务请求， 则直接根据存储的接入小区信息确定 对所述终端的寻呼范围并停止所述定时器； 在收到所述终端的 SDB起呼消息 后， 所述 BS对存储的所述接入小区信息进行更新， 并重新启动所述定时器； 如所述定时器超时， 则所述 BS删除存储的所述接入小区信息。
所述方法还包括： 所述 BS删除存储的所述接入小区信息后， 如再次收 到核心网发来的所述数据业务请求， 则从核心网获取寻呼范围并对所述终端 进行寻呼， 在收到终端发起的 SDB起呼的消息后透传给核心网， 并重新存储 所述终端当前的接入小区信息。
本发明还提供了一种基站系统， 包括 A接口、 空中接口、寻呼处理模块、 起呼处理模块、 存储模块和定时维护模块， 其中：
A接口是 BS与核心网之间的信令接口， 空中接口是 BS与终端之间的接 口； 寻呼处理模块设置为：收到核心网通过 A接口发来的 SDB模式的数据业 务请求后， 通知定时维护模块需寻呼的终端， 并向存储模块获取所述终端的 位置信息或通过 A接口向核心网获取所述终端的位置信息， 根据所述位置信 息确定寻呼范围并通过空中接口向所述终端发起寻呼；
起呼处理模块设置为： 收到所述终端通过空中接口发来的 SDB起呼消息 后， 将消息中的接入小区信息保存到存储模块或更新存储模块原有的接入小 区信息， 同时通知定时维护模块所述终端发起 SDB起呼；
存储模块设置为： 保存所述终端的接入小区信息；
定时维护模块设置为： 收到所述终端发起 SDB起呼的通知后启动一定时 器， 收到寻呼处理模块需寻呼的所述终端的通知后， 停止所述定时器， 当所 述定时器超时后， 删除存储模中所述终端的接入小区信息。
所述数据业务时定时进行的， 所述定时器时长大于所述数据业务定时时 长。
所述寻呼处理模块还设置为：收到核心网通过 A接口发来的 SDB模式的 数据业务请求后， 对要寻呼的每个终端， 判断存储模块是否保存有所述终端 的接入小区信息， 如是， 根据所述接入小区确定寻呼范围， 通过空中接口向 所述终端发起寻呼， 否则从核心网查询得到所述终端的位置区， 以所述位置 区为寻呼范围， 通过空中接口向所述终端发起寻呼。
上述方案的方法和系统可以较好的解决小流量、 高频度、 移动性强的数 据业务寻呼问题。 由于基站系统可以存储终端接入小区， 只是在核心网首次 发起 SDB模式的数据业务请求时， 向核心网查询一次寻呼范围， 之后在业务 进行过程中每次核心网发起 SDB数据业务请求后，基站系统无需再向核心网 请求寻呼范围， 减轻了 A接口信令链路负荷。 进一步地， 基站系统可以只将 终端接入小区及其邻接小区作为寻呼范围向终端发送 SDB寻呼，这个范围比 通常规划的 LAC位置区小很多，减轻了空中接口寻呼信道的负荷。更进一步， 基站系统可以通过设置定时器来实现对活动用户的接入小区信息的临时存 储， 当核心网不再发起 SDB数据业务请求时， 基站系统及时删除该终端的小 区， 不会占用太多静态资源。 附图概述
图 1为主叫控制信道 SDB流程图；
图 2为被叫控制信道 SDB流程图；
图 3为 GPS定位业务流程图；
图 4为本发明实施例基站系统的模块图；
图 5为本发明实施例的 SDB模式数据业务流程图；
图 6为本发明实施例应用于 GPS业务的流程图。
本发明的较佳实施方式
下面将结合附图及实施例对本发明的技术方案进行更详细的说明。
本实施例基于的系统包括核心网、 基站系统和终端， 其中核心网和终端 的功能可以不变， 基站系统的功能则进行了升级。
如图 4所示， 基站系统 (BS) 包括： A接口、 空中接口、 寻呼处理模块、 起呼处理模块、 存储模块和定时维护模块， 其中：
A接口是 BS与核心网之间的信令接口， 空中接口是 BS与终端之间的接 口。 寻呼处理模块用于收到核心网通过 A接口发来的 SDB模式的数据业务请 求后， 通知定时维护模块需寻呼的终端， 并向存储模块获取该终端的位置信 息或通过 A接口向核心网获取该终端的位置信息， 根据该位置信息确定寻呼 范围并通过空中接口向终端发起寻呼。
起呼处理模块用于收到终端通过空中接口发来的 SDB起呼消息后，将消 息中的接入小区信息保存到存储模块或更新存储模块原有的接入小区信息， 同时通知定时维护模块该终端发起 SDB起呼。
存储模块用于保存终端的接入小区信息。
定时维护模块用于收到终端发起 SDB起呼的通知后启动一定时器，收到 寻呼处理模块需寻呼的终端的通知后， 停止该定时器， 当该定时器超时后， 删除存储模中该终端的接入小区信息。 上述定时器时长要大于该数据业务的 定时时长。
具体地，寻呼处理模块收到核心网通过 A接口发来的 SDB模式的数据业 务请求后， 对要寻呼的每个终端， 判断存储模块是否保存有该终端的接入小 区信息， 如是， 根据该接入小区确定寻呼范围， 通过空中接口向该终端发起 寻呼， 否则从核心网查询得到该终端的位置区， 以该位置区为寻呼范围， 通 过空中接口向该终端发起寻呼。 本实施例根据接入小区确定寻呼范围时， 是 以该终端的接入小区及其邻接小区为寻呼范围， 其他实施例中， 也可以以该 接入小区所在的位置区为寻呼范围， 特别在终端以高速运动的场景下。
上述定时维护模块是可选的，接入小区信息也可以在业务结束后再删除。
如图 5所示， 当核心网向终端发起 SDB模式的数据业务请求时， 本方案 实施例流程的步骤如下：
步骤 201 : 核心网向 BS发送 SDB模式数据业务请求；
步骤 202: BS的寻呼处理模块通过 A接口收到该请求后，查询存储模块， 发现存储模块中没有该终端的接入小区信息，则按照被叫控制信道 SDB流程 通过 A接口向核心网发送消息请求寻呼范围， 消息中包含该终端的国际移动 用户识别码 IMSI;
步骤 203: 核心网才艮据终端的 IMSI号码确定该终端所在位置区， 向 BS 返回消息进行寻呼范围通知， 消息中包含该终端当前所在位置区；
步骤 204: BS的寻呼处理模块通过 A接口收到步骤 203返回的位置区， 根据该位置区确定寻呼范围，通过空中接口向该位置区对该终端进行 SDB寻 呼；
步骤 205: 该终端向 BS发送消息进行 SDB起呼， 该消息中包含该终端 当前的接入小区， 起呼处理模块通过空中接口收到该终端的 SDB起呼消息， 将消息中的接入小区信息保存到存储模块， 并通知定时维护模块该终端发起 SDB起呼， 定时维护模块为该终端启动一定时器， 该定时器时长比核心网发 起 SDB模式数据业务请求的周期长，同时起呼处理模块通过 A接口向核心网 转发该 SDB起呼消息， 返回 SDB模式数据业务响应；
步骤 206: 定时器超时前， BS再次收到核心网发送的 SDB模式数据业务 请求；
步骤 207: BS的寻呼处理模块通过 A接口收到该请求后， 通知定时维护 模块需寻呼的终端， 定时维护模块停止该终端的定时器， 同时， 寻呼处理模 块判断存储模块保存有该终端的接入小区信息， 取出该终端的接入小区， 结 合本地数据库保存的该小区的邻接小区， 组成寻呼小区组， 通过空中接口向 该寻呼小区组对该终端发起 SDB寻呼；
步骤 208: 该终端向 BS发送消息进行 SDB起呼， 携带该终端当前的接 入小区， BS起呼处理模块通过空中接口收到 SDB起呼消息， 更新存储模块 中原有的该终端的接入小区， 并通知定时维护模块该终端发起 SDB起呼， 定 时维护模块重新为该终端启动一定时器， 同时，起呼处理模块通过 A接口向 核心网转发 SDB起呼消息， 返回 SDB模式数据业务响应；
文中， "更新记录的该终端的接入小区" 是指保证存储的接入小区与起 呼消息中的接入小区一致的一种处理， 该更新处理在具体操作上， 可以是将 SDB起呼消息中的接入小区直接替换掉原来存储的接入小区， 也可以先比较 SDB起呼消息中的接入小区与记录的接入小区是否相同， 在不同时， 再替换 掉存储的接入小区信息。
步骤 209: 如果该定时器超时， BS没有收到核心网发出的 SDB模式数据 业务请求， 则定时维护模块删除存储模块中该终端的接入小区信息。
如图 6所示， 是本发明应用于 GPS定位业务的一个应用示例， 图中的请 求 GPS终端上报定位位置消息是通过被叫控制信道 SDB流程中 A9短数据传 输消息发送的， 请求寻呼范围是通过 A1BS服务请求消息发送的， MSC通知 寻呼范围是通过 ADDS寻呼消息来通知的， BS向 PCF上报 GPS终端定位位 置是通过主叫控制信道 SDB流程中 A9短数据传输消息发送的。 图中只包括 主被叫控制信道 SDB流程中的主要消息， 但本方案应用于 GPS定位业务的 实现也包括主被叫控制信道 SDB流程中的相关消息。 本发明应用于 GPS定 位业务包括如下步骤：
步骤 301 : PDSN通过 PCF, 向 BS发送消息请求 GPS终端上报定位位置 信息；
步骤 302: BS才艮据该 GPS终端的国际移动用户识别码 IMSI号码， 向 MSC发送消息请求寻呼范围， 查询该 GPS终端用户的登记位置区；
步骤 303： MSC访问 VLR或 HLR获得 GPS终端所在位置区， 通知 BS 本次寻呼的范围；
步骤 304: BS根据步骤 303得到的寻呼范围， 向 GPS终端发起 SDB寻 呼；
步骤 305: GPS终端收到 SDB寻呼后， 进行定位业务处理， 然后向 BS 发起 SDB起呼上报定位位置信息， BS收到 SDB起呼消息后， 向 PCF上报该 GPS终端的 GPS终端定位位置信息， 同时 BS存储本次起呼的接入小区， 并 启动定时器 Trecordposition , GPS 定位业务一般是定时进行， 定时器 Trecordposition的时长比 GPS定位业务的时间间隔长 2秒；
步骤 306: 若定时器 Trecordposition超时之前， BS再次收到 PCF发送消 息请求 GPS终端上报定位位置信息， 则停止定时器 Trecordposition, 取出存 储的该 GPS终端上一次接入的小区， 结合本地数据库保存的该小区的邻接小 区， 组成寻呼小区组；
步骤 307: BS根据步骤 306确定的寻呼小区组， 向 GPS终端发起 SDB 寻呼；
步骤 308: GPS终端收到 SDB寻呼后， 进行定位业务处理， 然后向 BS 发起 SDB起呼上报定位位置信息， BS收到 SDB起呼消息后， 向 PCF上报该 GPS终端定位位置信息， 同时 BS更新该终端的接入小区， 并重新启动定时 器 Trecordposition;
步骤 309: 若定时器 Trecordposition超时之前， BS再次收到 PCF发送消 息请求 GPS终端上报定位位置信息， 则按照步骤 306进行处理；
步骤 310:若定时器 Trecordposition超时没有收到 PCF发送消息请求 GPS 终端上报定位位置信息， BS删除存储的接入小区信息， 且不重新启动定时器 Trecordposition。
本实施例在定时器的时限内 BS保存终端的接入小区信息， 也可以用其 他方式， 如 SDB模式数据业务开始时 BS保存该终端的接入小区信息， 并在 该业务进行中更新该终端的接入小区信息， 直至该业务结束。
本方法以该改进的 GPS定位业务为一个实施例 ,并不限于 GPS定位业务， 本发明可以有各种更改和变形或者应用于其他具有类似特性的业务。 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 本发明的权利要求范围之内。
工业实用性 本发明可以较好的解决小流量、 高频度、移动性强的数据业务寻呼问题。 由于基站系统可以存储终端接入小区，只是在核心网首次发起 SDB模式的数 据业务请求时， 向核心网查询一次寻呼范围， 之后在业务进行过程中每次核 心网发起 SDB数据业务请求后， 基站系统无需再向核心网请求寻呼范围， 减 轻了 A接口信令链路负荷。 进一步地， 基站系统可以只将终端接入小区及其 邻接小区作为寻呼范围向终端发送 SDB寻呼， 这个范围比通常规划的 LAC 位置区小很多， 减轻了空中接口寻呼信道的负荷。 更进一步， 基站系统可以 通过设置定时器来实现对活动用户的接入小区信息的临时存储， 当核心网不 再发起 SDB数据业务请求时， 基站系统及时删除该终端的小区， 不会占用太 多静态资源。

Claims

权 利 要 求 书
1、 一种小流量无线数据传输方法， 应用于控制信道短数据突发 (SDB)模 式的数据业务， 所述方法包括：
在所述数据业务开始后， 核心网、 基站系统 (BS)和终端先进行一次控制 信道 SDB被叫流程和主叫流程，且所述 BS在收到所述终端发送的 SDB起呼 消息后， 存储所述消息中携带的所述终端当前的接入小区信息； 以及
在所述控制信道 SDB被叫流程和主叫流程之后进行的控制信道 SDB被 叫流程和主叫流程中， 当所述 BS在本地存储有所述接入小区信息时，直接根 据所述接入小区信息确定对所述终端的寻呼范围， 在收到所述终端发送的 SDB起呼的消息后， 更新存储的所述终端当前的接入小区信息。
2、 如权利要求 1所述的方法， 其中，
所述 BS才艮据所述接入小区信息确定对所述终端的寻呼范围时， 是将所 述接入小区及所述接入小区的邻接小区作为所述终端的寻呼范围。
3、 如权利要求 1或 2所述的方法， 其中，
所述数据业务为 GPS定位业务。
4、 如权利要求 1或 2所述的方法， 其中， 所述方法还包括：
所述数据业务开始后， 所述 BS 第一次收到核心网发送的所述数据业务 请求时， 按照被叫控制信道 SDB流程， 向核心网请求寻呼范围， 核心网返回 终端当前所在位置区， 所述 BS 以该位置区为寻呼范围对所述终端发起 SDB 寻呼。
5、 如权利要求 1或 2所述的方法， 其中， 所述方法还包括：
所述数据业务是定时进行的；
所述 BS收到所述终端的 SDB起呼消息后， 还为所述终端启动定时器， 所述定时器时长大于所述数据业务定时时长，如所述 BS在所述定时器到时前 收到核心网发来的所述数据业务请求， 则直接根据存储的接入小区信息确定 对所述终端的寻呼范围并停止所述定时器； 在收到所述终端的 SDB起呼消息 后， 所述 BS对存储的所述接入小区信息进行更新， 并重新启动所述定时器； 如所述定时器超时， 则所述 BS删除存储的所述接入小区信息。
6、 如权利要求 5所述的方法， 其中， 所述方法还包括：
所述 BS删除存储的所述接入小区信息后， 如再次收到核心网发来的所 述数据业务请求， 则从核心网获取寻呼范围并对所述终端进行寻呼， 在收到 终端发起的 SDB起呼的消息后透传给核心网，并重新存储所述终端当前的接 入小区信息。
7、 一种基站系统， 包括 A接口、 空中接口、 寻呼处理模块、 起呼处理 模块、 存储模块和定时维护模块， 其中：
A接口是 BS与核心网之间的信令接口， 空中接口是 BS与终端之间的接 口； 寻呼处理模块设置为：收到核心网通过 A接口发来的 SDB模式的数据业 务请求后， 通知定时维护模块需寻呼的终端， 并向存储模块获取所述终端的 位置信息或通过 A接口向核心网获取所述终端的位置信息， 根据所述位置信 息确定寻呼范围并通过空中接口向所述终端发起寻呼；
起呼处理模块设置为： 收到所述终端通过空中接口发来的 SDB起呼消息 后， 将消息中的接入小区信息保存到存储模块或更新存储模块原有的接入小 区信息， 同时通知定时维护模块所述终端发起 SDB起呼；
存储模块设置为： 保存所述终端的接入小区信息；
定时维护模块设置为： 收到所述终端发起 SDB起呼的通知后启动一定时 器， 收到寻呼处理模块需寻呼的所述终端的通知后， 停止所述定时器， 当所 述定时器超时后， 删除存储模中所述终端的接入小区信息。
8、 如权利要求 7所述的基站系统， 其中，
所述数据业务时定时进行的， 所述定时器时长大于所述数据业务定时时 长。
9、 如权利要求 7所述的基站系统， 其中，
所述寻呼处理模块还设置为：收到核心网通过 A接口发来的 SDB模式的 数据业务请求后， 对要寻呼的每个终端， 判断存储模块是否保存有所述终端 的接入小区信息， 如是， 根据所述接入小区确定寻呼范围， 通过空中接口向 所述终端发起寻呼 , 否则从核心网查询得到所述终端的位置区 , 以所述位置 区为寻呼范围， 通过空中接口向所述终端发起寻呼。
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