近年来,智能手机的应用越来越普及,智能手机用户数量高速增长,用户对移动宽带数据的需求与日俱增。针对不断增加的数据洪流,如何通过技术革新在满足当前用户对数据需求的前提下,尽可能地提高用户体验,是运营商在移动互联时代制胜的关键。第四代移动通信(4G)技术正是为解决上述问题而发展起来的。4G加入了现有3G的增强技术,将3G网络和无线局域网系统融为一体,成为多功能集成的宽带移动通信系统,为移动用户提供高达百兆的网 In recent years, the application of smart phones has become more and more popular, the number of smart phone users has grown rapidly, and the demand for mobile broadband data has been increasing day by day. In view of the increasing torrent of data, how to improve the user experience as much as possible under the premise of meeting current data needs of users through technological innovation is the key for the operators to win in the mobile Internet era. The fourth generation of mobile communication (4G) technology is developed to solve the above problems. 4G joined the existing 3G enhancement technology, 3G networks and wireless LAN systems will be integrated into a multi-function integrated broadband mobile communication system, providing up to 100 megabytes of mobile networks for users