介绍了基于A-GPS的全球用户连通系统的用途及含义，描述了这种系统的基本设计框架及系统体系结构。该系统采用基于互联网的三层服务器体系结构与基于有线/无线通信网络的智能用户终端相结合的S/C模式。接着讨论了为有效实现这种系统而需进一步深入研究的若干关键技术。为更好地理解这个系统，对该系统做了简单的功能和结构分析，并用一个简单例子来说明它的一些特点。 This paper presents the design framework of a kind of global user-connected system based on an assisted global positioning system (A-GPS) after introduced its purpose and meanings. In this system, a Server/Client model is selected, which uses a three-leveled server subsystem based on Internet and many intelligent user terminals based on local network/wireless communication. In order to implement this system effectively, several key researching tech-niques is presented. To understand this system deeply, this system has been analyzed in function and structure. In the end, its main features can be discovered by a simple example.
References
[1]
GPS官方网网站[URL]. Introduction to GPS.
http://gpshome.ssc.nasa.gov
