针对基本移动IP协议虽然简单但只适用于大范围、低速的情况 ,提出了一种新的微观移动IP切换方法———避免分组丢失切换方法 .该切换方法通过在基站处增加缓存以及利用IP分组的标识 ,将切换过程中分组丢失减少至最小 .并给出了该切换方法所适用的分层全IP网络结构及其切换过程 ,对基站缓存的大小、切换带来的网络负荷、切换延时等也进行了分析 .仿真和分析结果表明最小分组丢失切换方法适用于快速移动、频繁切换的环境 . Although the basic mobile IP protocol is simple but only suitable for large-area and low-speed situations, a new micro-mobile IP handover method is proposed, which is to avoid packet loss handover, which is achieved by adding a cache at the base station and using IP Packet identification, the packet loss during the handover process is reduced to a minimum.This paper also gives a hierarchical all-IP network structure and the handover procedure applicable to the handover method, and gives the buffer size of the base station, the network load caused by the handover, the handover delay Etc. The simulation and analysis results show that the minimum packet loss switching method is suitable for fast moving and frequent switching environment.