全IP无线网络下软切换的研究

在全IP无线网络中，实现软切换的两个关键性问题就是数据分组和数据内容融合。数据分组就是IP包通过数据分组机制复制成多个相同内容的IP包，并通过多个BS发送给同一MN。数据内容融合就是能够使MN接收到的不同BS的相同IP包准确的融合成一个IP包。提出了基于IPv6的软切换网络结构，通过网络中的中心服务器和接入路由器各维护一张缓存表，达到数据分组和数据内容融合，从而使减小传输时延和消除数据丢失问题成为可能。

A Research on Soft Handoff in All - IP Wireless Networks

In All-IP wireless networks, two key problems need to be solved in order to realize soft handoff are dada distribution and data content merging. Dada distribution is that multiple same IP packets which duplicated by distribution mechanism are sent to the same mobile node via multiple base stations. Data content merging is that pieces of data received by mobile node from different base stations should be merged a single copy.This paper propose a soft handoff network structure based on IPv6, the centralized server and access router both have a table which ensure dada distribution and data content merging, and make it is possible to reduce transmission delay and eliminate packet losses.