Gprs Data Transmission Technology And Its Application In Its

With the development of the information-society, the mobile-communication has penetrated each aspect of the life. The present Voice-Service can't meet the demand of the communication. The mobile data communication was widely used as a new service. GPRS (General Packet Radio Service) Network managed by China Mobile is developed in this environment. GPRS data transmission rate is up to 115kbps, it permits subscriber to receive and transfer data in P2P (Peer to Peer) packet-transfer mode without needing the network sources in circuit-switch mode. Otherwise the low layer of the GPRS is based on TCP/IP protocol and can connect the Internet without leak.ITS (Intelligent Traffic System), one of the most popular application of GPRS data service, is also widely used. Traffic status is one of the most important scale of a city. With the celebration of Olympic Games 2008 and Expo 2010, the two main city of China will face the test of traffic status. Shanghai Informatization Committee is preparing to construct the long-triangle Navigation system. This item is the pre-study work under this background.The thesis mainly studies the mode of GPRS data transmission, and discuss the basic structure, main function and realization way of ITS, moreover construct the Vehicle terminal equipment and Service center of the navigation system.The first chapter discusses several wireless transmission modes and the development national and international, and then introduces the background of the thesis. In the second chapter, the thesis studies the main technique needed by the task, which consist the key technique, such as GPRS data transmission mode, GPS position technique and DSP (digital signal process) technique etc. The third chapter introduces the principle of the Vehicle Navigation Position System. In addition the thesis develops and realizes the Vehicle terminal equipment of the Vehicle Navigation Position System, which be composed of receiver, procession and transmission of GPS position information. These work is studied in forth chapter. At last, in fifth, sixth and seventh chapter, the thesis analyses the problem occurred in practice and development and gives the solution. Otherwise, the thesis gives the next step on the research and gets a conclusion of the work.The thesis accomplishes the study work of The Navigation Location Systemvehicle sample device and realizes the basic function of Service Center. Furthermore we succeed in transmitting data via GPRS network, and discussing the data process method of GPS location information. In a word, the thesis gets what we wanted.