Car Gps / Gprs Navigation System In The Electronics

Vehicle navigation system has become a fast–growing industry in recent years. In Europe and Japan, vehicle navigation system has been put in widely application. In our country, by the development of industry of Vehicle the market of the application of Vehicle navigation system is quickly increased. The developments of Internet and ITS also enhance the trend. The resource of Internet and the information of space can combined in the application of vehicle navigation system, and the combination can bring large value in the future. So the vehicle navigation system have a widely foreground.This thesis makes full use of the virtue of GPRS (General Packet Radio Service) technique, and combined with the technique of GPS (Global Position System) and GIS (Geophysics Information System), a plan of vehicles navigation system is proposed in this article. This system receives GPS position information, and sends it to Internet through GPRS net. And with the technique of GIS, it realizes managing vehicles at the watching end. It enhances the vehicles using and managing efficiency.Firstly, this paper introduces the GPS navigation system and describes the structure and characteristics of GPRS network. GPRS network is a mobile packet data net by adding two nodes to GSM network, SGSN and GGSN. By using packet exchanging technique, it overcomes the low-efficiency and low-utilization in circuit exchanging. Thus it provides a general radio packet service with high-efficiency and low-cost.Secondly, it analyzes the hardware and software architecture of embedded terminal.Thirdly, it shows the analysis and design for the component of embedded application.Finally, it evaluates the analysis and design of embedded software and makes a summary. It also prospects the future research at last.