【摘要】 利用移动IPv6快速切换的特点和上下文切换技术相结合,综合快速切换和层次化移动管理的优势,通过对移动IPv6快速切换模型和信令交互的修改,以及对邻居发现协议的扩展,提出一套基于移动IPv6的服务质量上下文转移方案QoSCT.该方案引入功能实体切换指示节点(HDP),搜索最适合的接入路由器并指导相应邻接路由器传递实时业务流的QoS上下文;利用快速切换方案的链路层触发机制作为上下文切换的触发点,在移动节点完成切换的同时完成QoS上下文的转换,避免了移动节点盲目切换和资源浪费.理论分析和仿真试验表明,QoSCT方案可以显著降低实时业务切换时的延迟抖动,实现移动节点的无缝切换.更多还原

【Abstract】 A new QoS context transfer solution named QoSCT was introduced. QoSCT extends Fast-handover and Neighbor Discovery protocol; it imports handover decision nodes to MIPv6 model to search the best access router and direct corresponding access routers to transfer the QoS context of mobile node’s real-time service. Combining with Fast-Handover and taking L2trigger as a context transfer point,QoSCT parallelism network layer handover and QoS configuration, so it avoids Mobile Node’s blindfold handover and resource waste. Theoretic analyses and simulations showed that QoSCT can decrease the latency and jitter obviously to provide seamless handover.更多还原