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CDPD(Cellular Digital Packet Data,蜂窝数字分组数据)网是上世纪末我国建立的第一代公共移动数据网,虽然覆盖不广应用不普遍,但为了使读者了解移动数据网技术的发展和演进过程,本文对CDPD网的结构和选路技术做一简要介绍。GPRS(General Packet Radio Service,通用分组无线业务)网是近几年刚发展起来的第二代移动数据网,网络覆盖广,数据业务和应用也正在快速发展。本文对从技术角度对GPRS网络的结构、业务、分组传送和选路等方面做一基本介绍。
Cellular Digital Packet Data (CDPD) network is the first generation of public mobile data network established in China by the end of last century. Although coverage is not widely used, in order to make readers understand the development and evolution of mobile data network technology, This article gives a brief introduction of CDPD network structure and routing technology. The General Packet Radio Service (GPRS) network is the second generation mobile data network that has just been developed in recent years. The coverage of the network is wide and the data services and applications are also rapidly developing. This article from the technical point of view of the GPRS network structure, services, packet routing and routing and so on to make a basic introduction.