A seamless handoff approach of mobile IP based on dual-link

Mobile IP protocol solves the problem of mobility support for hosts connected to Internet anytime and anywhere, and makes the mobility transparent to the higher layer applications. But the handoff latency in Mobile IP affects the quality of communication. This paper proposes a seamless handoff approach based on dual-link and link layer trigger, using information from link layer to predict and trigger the dual-link handoff. During the handoff, MN keeps one link connected with the current network while it handoff another link to the new network. In this paper we develop a model system based on this approach and provide experiments to evaluate the performance of this approach. The experimental results show that this approach can ensure the seamless handoff of Mobile IP.