基于多播的移动IP位置管理的研究

Researches on mobile IP position management based on multicast network collaboration

提出了一种通过多播中组管理功能完成移动IP位置管理方法。每一个自治网络中都设置一个移动路由代理(MA),形成一个管理移动节点位置绑定信息的虚拟专用网,通过将与移动主机通信的节点联合起来构成一棵多播树,使网络中各节点相互合作维护移动节点的位置更新。设计了绑定信息表的存储结构和管理移动位置绑定信息的算法。模拟实验表明,提出的基于多播的位置管理方案能够使通信对端实时了解移动节点的转交地址,减少向家乡代理注册的时间和次数,减小了传输延迟,为实时业务传输提供较好的支持。同时减轻了家乡代理和各主机的负担,使移动IP的性能得到优化。

A method of mobile IP position management which uses group managing function in multicast was proposed. Mobile agent （MA） was set in each autonomous network to form a VPN that manage the position binding information of mobile nodes. By putting nodes together for communicating with mobile host to make a multicast tree, the position binding information of mobile＇nodes was maintained through the collaborative work of each node in network. The storage structure of binding information table and the algorithm on how to manage mobile position binding information were designed. Simulation shown that the method proposed can make correspondent nodes understand mobile node＇s care-of address （CoA） in real-time, decrease registration time and times, decrease transmission delay, for supporting real-time service wonderfully. At the same time, the loads of home agent and hosts are alleviated. The performance of mobile IP is optimized.