Abstract: Concerning the long recovery time to re-establish the optimized path after mobile node's handover, this paper proposed a fast handover based route optimization approach in proxy mobile IPv6. The new approach, which was initiated by previous mobile access gateway in advance in mobile node's fast handover procedure, achieved fast recovery of optimized path. Performance analysis shows that the new intra-domain route optimization method can reduce average route optimization cost by 21.7% and the setup time of route optimization state by 45.4%, compared with the local mobility anchor initiated route optimization protocol. In addition, the new inter-domain route optimization method can decrease the setup time of route optimization state by 72.2% in comparison with the existing inter-domain handover and route optimization approach.

Key words: Proxy Mobile IPv6 (PMIPv6), fast handover, route optimization, fluid-flow mobility model

摘要： 针对代理移动IPv6移动节点(MN)切换后重建优化路径时延较长问题，提出一种基于快速切换的路由优化方案。新方案通过在MN快速切换过程中由旧移动接入网关提前发起路由优化，实现了优化路径的快速重建。性能分析表明，新域内路由优化方案比局部移动锚点发起的路由优化方案减少了21.7%的路由优化平均费用和45.4%的路由优化状态建立时延；新域间路由优化方案比现有域间切换及路由优化方案减少了72.2%的路由优化状态建立时延。

关键词: 代理移动IPv6, 快速切换, 路由优化, 流体移动模型