移动通信系统结构概述

Mobile Communication System Architecture Overview

针对目前移动通信在全球范围内的迅猛发展，本文分别对第二、三、四代移动通信系统的网络结构作了简单描述，并对各自的优缺点作了简要的概述。

To the swift and violent development of mobile communication in the world at present, This paper describe briefly the network structure of the 2th,3th,4thgenernation mobile communication system,and has done the simple summary to one＇s own advantage and shortcoming.