移动IP中低延迟切换的研究  

Research of low-delay handoff in mobile IP

作　　者：李娟[1] 杨孝宗[1] 王鸿鹏[1] 高屾[1] 

机构地区：[1]哈尔滨工业大学深圳研究生院,广东深圳518055

出　　处：《计算机工程与设计》2006年第7期1124-1126,共3页Computer Engineering and Design

基　　金：国防"十五"预研基金项目(41316.4.2)

摘　　要：移动IP技术支持节点在不改变本身IP地址的情况下随时连接Internet。随着应用需求的不断提高,Mobile IPv4的低延迟切换已经无法满足目前的需求。在这篇文章中,提出一种新的策略来达到保证节点从一个子网进入另一个子网低延迟的较好效果。首先,代理提供一种缓存机制:如果通信过程中移动结点已经移动,代理将仍发送给移动节点的数据包缓存;接着,在各个代理上维护一个表格用来记录移动节点最新位置信息,代理通过这些信息将缓存的数据包转发到移动节点的最新位置。通过策略实施的具体工作分析,得出切换过程中数据包传递延迟可以明显减小的效果。Mobile IP provides mobility support hosts connected to the Intemet without changing their IP addresses. Along with the increasing of applications＇ requirement, Low-delay handoff of mobile IPv4 can＇t satisfied the needs at present. A new strategy that can obtain the better result to get low delay when node transfers from one subnet to another subnet is presented. Trst, foreign agents buffer packets for a mobile host and send them to its new location when it leaves to the new foreign agent. Second, foreign agents and home agents maintenance a table that records a mobile node＇s latest location and the foreign agents can send the packets on their buffer to which that node leaved to. The conclusion from implementing the strategy and analyzing procedure of the strategy manifests the reducing of the delay of packet handoff during low-delay handoff.

关 键 词：移动IPV4 低延迟切换 缓存机制 数据包 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]