本地移动域内嵌套移动网络的路由优化

Route Optimization for Nested Mobile Network in Local Mobility Domain

针对网络移动性基本协议所产生的次优路由问题,提出了一种新的路由优化解决方案.该方案通过修改本地化管理框架、扩展路由器通告消息中的前缀信息选项以及采取相应的地址配置和移动性检测策略,能区别对待移动子网在本地管理域内及域外的切换;同时解决了路由优化与信令开销问题.该方案的实施能有效地减少数据传输的隧道长度、封装次数及传输延迟,尤其适用于移动子网在一定区域内频繁移动时的情况.

To solve suboptimal routing problem caused by network mobility basic support protocol, a novel route optimization solution is proposed which makes difference between handover inside and outside local mobility domain, modifies localized mobility management framework, extends prefix information option in router advertisement message and adopts corresponding address delegation and movement detection strategies. This solution can provide optimized routing, reduce signaling and latency and shorten tunnel length as well, especially when mobile network moves frequently.