改进型分层移动IPv6移动性管理策略  

An Enhanced Mobility Management Scheme for Hierarchical Mobile IPv6

作　　者：蒋群艳[1] 蒋铃鸽[1] 何晨[1] 

机构地区：[1]上海交通大学电子信息与电气工程学院,上海200240

出　　处：《上海交通大学学报》2007年第8期1343-1347,1352,共6页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金资助项目(60372076)

摘　　要：针对目前分层移动IPv6移动性管理策略在用户移动时无法达到无缝切换的缺陷,提出了改进型分层移动IPv6移动性管理策略(tMT-HMIP).该策略利用网络的层次化结构特性,通过改进切换触发机制、地址配置策略,对切换过程进行了优化.在移动终端向移动锚点(MAP)注册新链路地址的过程中,通过在移动锚点处建立临时地址映射表,将发往原链路地址的数据包缓存,并将其链路地址映射为新链路地址.保证从原链路失效之后到新链路建立之前,数据包不被丢失.仿真结果表明,该策略减少了切换绑定代价和切换延时,有效地避免了切换过程中数据包的丢失,达到无缝切换的目的.As hierarchical mobile IPv6 scheme can not reach the requirement of seamless handoff, this paper proposed an enhanced mobility management scheme for hierarchical mobile IPv6 （tMT-HMIP）. It takes use of the characteristic of hierarchical network structure, optimizes the handoff procedure by improving the handoff trigger and address allocation method. When MN requires a new on-Link Care of Address, a temporary address mapping table is built in MAP. It buffers the packets and maps the old address to the new address. It ensures the packets sent between old link lapse and new link effects are not lost. The simulation results show that this scheme can reduce the total binding overhead and handoff latency, void handoff packet loss efficiently, can reach the requirement of seamless handoff.

关 键 词：网络融合 移动性管理 分层移动IPV6 地址映射表 

分 类 号：TN929.5[电子电信—通信与信息系统]