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对第三代移动通信的起源、目标及进展，主要系统、系统布设和反向兼容性，网络的演进做了较全面介绍．对业务及发展基础，第三代系统的应用时间表和难点做了较详细的分析，并表明了个人观点
The third generation of mobile communications origin, goals and progress, the main system, system deployment and reverse compatibility, network evolution made a more comprehensive introduction. On the basis of business and development, the third generation system application schedule and difficulties made a more detailed analysis, and shows the personal point of view