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 vehecular speeds. The result shows that current MIP protocol is not suitable for rapidly moving environments. Through careful analysis of the relationship between performance and speed, and through a breaking down analysis 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 performance of MIP/WLAN in rapid moving environments.