文章首先回顾了第一代（模拟）移动通信和第二代（数字）移动通信技术的演进，预测今后10年是移动通信大发展时期，它的用户将超过固定电话用户数。随着因特网的发展，移动通信业务将从话音扩展到数据，移动通信技术也将从电路模式发展到分组模式。文章在简介即将投入应用的第二代半移动通信技术之后，引出面向宽带多媒体应用的第三代移动通信（3GM），重点介绍了被选作3GM国际无线传输技术标准的几种主流方案及其关键技术，特别对其中由我国提交的TD-SCDMA方案的技术特点作了说明，最后展望了网络如何从第二代移动通信过渡到第三代移动通信及3GM核心网发展趋势。

The article firstly reviews the evolution of the 1st generation (analogy) mobile communication system and the 2nd generation (digital) mobile communication system, and predicts that deployment of mobile communication systems will be enter a development period at a more great rate in the next decate. The mobile communication service will extend from voice to data, and the mobile communication technology will transits from circuit mode to packet mode. Following briefly addressing the second and half generation mobile communication system (2.5 GM) that will come to application soon, introduces the 3rd generation mobile communication (3 GM) for broadband multimedia application. Some schemes as mainstream of 3GM RTT (radio transmission technology) standards and the key technologies, especially technical features of TD - SCDMA presented by China, are emphatically described. Finally, The transition strategy from 2GM to 3GM and the development trend of 3GM core network are prospected in this article.