With the development of the 3g wcdma digital cellular mobile communication technologies and quick increase of chinese mobile communication market ' s requirment to multi - media data service , mobile communication technology is developing from providing simple voice service 、 low speed data service to providing the combination of the voice service and the variable band - width multi - media data service . wcdma already has been a 3g communication standard in many country 随着3gwcdma数字蜂窝通信技术的发展以及中国移动通信市场对多媒体数据业务需求的迅速增长，移动通信技术正从提供简单的话音业务。低速数据业务向提供话音业务和可变带宽的多媒体数据业务相结合的方向发展， wcdma已经成为很多国家选用的第三代移动通信的标准。
