快速切换是移动IPv6技术的关键问题之一.为了改善移动IPv6的快速切换性能,文中提出一个基于分层移动的快速切换方案HMFH.该方案基于微移动和链路层触发的思想,重点针对切换过程中的切换延迟、切换丢包、可扩展性以及路由影响等移动特性进行设计.仿真结果表明,HMFH具有切换延迟短、切换丢包少、可扩展性好、路由效率高等优点,同时不会降低移动接入的安全性和可靠性,是一个高效的快速切换解决方案.

 In order to improve the performance of fast handover which is a key technology of mobile IPv6,this paper proposes a hierarchical mobility-based fast handover scheme named HMFH.HMFH integrates the micro-mobility with the link-layer trigger,and focuses on such mobile characteristics as handover delay,handover packet loss,scalability and route information.Simulated results indicate that HMFH is an effective handover scheme with short handover delay,low packet loss rate,good scalability and high route efficiency;and that it does not result in the security and reliability degradation of mobile access.