摘要： 移动IP 技术中的切换延时是阻碍移动IP 技术广泛应用的关键问题。该文提出了一种基于双链路的切换协议，该协议在提前触发等机制的保障下采用链路冗余的方式，实现了移动节点的无缝切换。另外，对该协议在切换性能上的改进进行了分析，并对该协议下切换过程中的通信性能进行了测试。

关键词: 移动IP；双链路；切换

Abstract: Handoff latency is a key problem that holds back the application of mobile IP. This paper proposes a handoff protocol based ondual-link.This protocol makes use of redundant link based on the scheme of pre-triggering to realize seamless handoff of mobile node. This paper also analyzes the improvement of this protocol on the handoff performance and conducts experiments of communication performance during the handoff process with respect to the proposed protocol.

Key words: Mobile IP; Dual-link; Handoff