论文部分内容阅读
GPRS(General Packet Radio Service)是一种基于GSM系统的通用分组无线业务,提供端到端的、广域的无线IP连接。其方法是以“分组”的形式传输数据,网络容量只在所需时分配,不需要时就释放。这种数据传输技术速度快,通信质量高,无须经过公用电话交换网的转接。车载GPS终端正是利用GPRS通信网络,实现定位数据信息到监控客户端的可靠传输。定位单元和通信单元是车载GPS终端的关键组件,以往设计中通常采
General Packet Radio Service (GPRS) is a universal packet radio service based on the GSM system, providing end-to-end and wide area wireless IP connectivity. The method is to “packet ” form of transmission of data, network capacity allocated only when needed, released when not needed. This kind of data transmission technology is fast, the communication quality is high, does not need to pass through the public telephone exchange network transfer. Car GPS terminal is the use of GPRS communication network, positioning data to monitor the client to achieve reliable transmission of information. The positioning unit and the communication unit are the key components of the car GPS terminal, which is usually adopted in the past designs