说明：  】3GPP LTE是基于OFDM和MIMO技术对当前3G系统的中长期演进，对现有的3G系统的网络结构和无线接入方 式都有较大的改进。 文章详细分析了3GPP LTE所规范的切换过程， 并对各大厂商提出的移动终端接入目标基站的几种方法 （同 步和非同步）做了比较性研究。
(3G LTE based on the technology of OFDM and MIMO is the long term evolution of 3G system , and it has made great improvement on the net structure and radio access. In this paper, the process of handover in the 3GPP LTE is analyzed in detail and some comparative research on the several methods on the access of UE to the e-NodeB (synchronization and non-synchronization) is carried out.)