应用双层指针缩短切换时延及优化路由的分布式移动性管理方案

发布时间：2018-03-10 09:40

本文选题：移动性管理　切入点：分布式锚点　出处：《浙江大学学报(理学版)》2017年04期 　论文类型：期刊论文

【摘要】：根据锚点位置固定有否,移动IP协议分为锚点固定的移动性管理协议和分布式移动性管理协议两类,后者允许移动节点在会话开始时动态地选择较近的接入路由器作为锚点,从而可以缩短切换时延并实现近似最优的路由.然而,对于给定的会话,锚点的位置是固定的,在会话持续时间内进行移动节点切换时,切换操作与锚点固定的移动性管理协议相同,存在切换时延长和路由欠优问题.为解决该问题,提出了应用双层指针的分布式移动性管理方案.使用"低层指针"在具有移动性管理功能的接入路由器间建立指向关系以缩短切换时延;使用"高层指针"定期向锚点或对端节点注册优化路由并动态更换锚点;推导了所提方案和已有方案的切换时延公式.数值分析和仿真结果表明,所提方案可以缩短分布式移动性管理的切换时延.
[Abstract]:According to whether the anchor position is fixed or not, the mobile IP protocol is divided into two categories: mobility management protocol with anchor point fixed and distributed mobility management protocol. The latter allows mobile nodes to dynamically select the nearest access router as anchor point at the beginning of the session. However, for a given session, the anchor position is fixed, and when the mobile node is switched within the duration of the session, The handoff operation is the same as the mobility management protocol with fixed anchors, and there are the problems of handoff extension and underrouting. In order to solve this problem, A distributed mobility management scheme with double pointers is proposed in this paper. The "lower level pointer" is used to establish a pointing relationship between access routers with mobility management function to shorten the handover delay. The "high level pointer" is used to register the optimized route to the anchor point or the peer node periodically and to dynamically change the anchor point. The switching delay formula of the proposed scheme and the existing scheme is derived. The numerical analysis and simulation results show that, The proposed scheme can shorten the handoff delay of distributed mobility management.
【作者单位】：杭州师范大学现代教育技术中心;嘉兴学院数理与信息工程学院;
【基金】：浙江省自然科学基金资助项目(LY16F020031) 杭州师范大学科研启动经费项目(2017QDL008) 浙江省教育厅科研资助项目(Y201328875)
【分类号】：TP393.04

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