智能车载终端的GPRS多路连接通信的研究

随着人们对车辆的监控和调度的需求更加迫切,GPS车辆监控系统的发展迅速,智能车载终端会被要求与多个应用中心进行数据交互.提出并实现了智能车载终端的GPRS多路连接通信,根据终端需求,硬件上采用STM32作为终端的微控制器,SIM900A作为GPRS通信模块,终端还包括GPS模块、CAN收发电路、DS1302实时时钟等部分；软件上与单路连接作分析比较,实现了GPRS模块的启动及初始化、GPRS初始设置、连接多路IP、收发数据以及断线处理.经测试,终端能够实现所要求的功能,且稳定性好、工作效率高.

Research on GPRS Multi Link Communication of Intelligent Vehicle Terminal

As the needs of vehicle monitoring and scheduling are urgent,GPS vehicle monitoring system is developed rapidly.Intelligent vehicle terminal is asked to exchange data with multiple application centers.The method of multi-link communication with intelligent vehicle terminal is proposed and implemented.According to the needs of terminal,the hardware of the terminal is designed,which uses STM32 as the end of the microcontroller and SIM900A as GPRS communication module,including GPS module,CAN sending and receiving circuit,DS1302 real time clock and so on.Through analyzing and comparing with the single link communication method on the software,the functions of GPRS module start and initialization,GPRS initial setting up,connecting multiple IP,sending and receiving data,and disconnection processing are realized.According to the test,the required functions are achieved by the terminal with good stability and high efficiency.