面对未来第三代移动通信激烈的市场竞争,已有的GSM运营商如何以较少的投资,快速建成高质量、易扩展的第三代移动通信网,同时尽量减少因新建网络带来的巨额成本,将是每一个即将拿到3G牌照的运营商必须关注的焦点。针对上面的问题。现简要介绍了第三代移动通信系统,并对三种技术体制作出概述。最后,对比三种体制的优缺点,为了下一步进行网络融合打下基础。 Faced with the fierce market competition of the third generation mobile communications in the future, how can the existing GSM operators rapidly build high-quality and scalable third generation mobile communication networks with less investment while minimizing the impact of newly established networks The huge cost will be the focus that every operator who gets the 3G license soon must pay close attention to. For the above problem. Now briefly introduces the third generation mobile communication system, and gives an overview of the three technical systems. Finally, comparing the advantages and disadvantages of the three systems, lay the foundation for the network convergence in the next step.