一种减少移动IPv6切换延时的新方法

A new method of reducing handover delay of IPv6

切换问题是移动计算环境中最基本的问题。理想的切换是指同时具备快速切换和平滑切换能力的无缝切换;快速切换就是要求系统具有最小的切换时延,平滑切换则要求系统具备最低的丢包率。现提出一种基于组播的平滑切换框架模型,该模型的基本思想是让移动节点本身携带途经的接入路由器绑定更新队列,每当移动节点到达一个新的链路并获得该链路的转交地址,就向家乡代理和队列成员进行组播。该模型有效地减少了数据包的丢失率,减少了延时,并与现有的快速切换/IPv6路由优化技术能很好地结合起来。

Handover is the most basic problem in the mobile environment. An ideal scheme named seandess handover can work as both fast handover and smooth handover. Fast handover requests the system to have minimum Handoff Latency, and smooth handover requests the system to have the lowest packet loss rate. This article proposed a smooth handover model based on multicast. The basic thought is a queue of passed routers taken by the mobile node, whenever the mobile node arrives a new link and acquires a new locating address, it will multicast toward home agent and members of queue. That model reduces availably packet loss rate, reduces delay, and can combine well with existing fast handover/IPv6 route optimization.