Performance of MIP/WLAN in Rapid Mobility Environments

In this paper, the performance of Mobile IP (MIP) over Wireless LAN is evaluated using a testbed at different ve- hecular speeds. The result shows that current MIP proto- col is not suitable for rapidly moving environments. Through careful analysis of the relationship between per- formance and speed, and through a breaking down analy- sis of the handoff latency of MIP/WLAN, we propose a speed adaptive MIP protocol extension. In this protocol extension, a concept, handoff rate, is defined and is used to extend the MIP protocol. An evaluation of the speed adaptive MIP shows that it greatly improves the perform- ance of MIP/WLAN in rapid moving environments.