SPEED ADAPTIVE MOBILE IP OVER WIRELESS LAN By JUN TIAN A DISSERTATION PRESENTED TO THE GRADUATE SCHOOL OF THE UNIVERSITY OF FLORIDA IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF DOCTOR OF PHILOSOPHY UNIVERSITY OF FLORIDA

of Dissertation Presented to the Graduate School of the University of Florida in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy SPEED ADAPTIVE MOBILE IP OVER WIRELESS LAN By JUN TIAN DECEMBER 2005 Chair: Dr. Abdelsalam (Sumi) Helal Major Department: Computer and Information Sciences and Engineering. This dissertation presents two novel contributions in the area of mobile network communication. The first is the performance/moving speed relationship of Mobile IP over wireless LAN. In this dissertation, the rapid mobility of MIP over Wireless LAN is emulated on a testbed. The performance of MIP over Wireless LAN at different moving speeds is evaluated. The result shows that current MIP protocol is not suitable for rapid moving environments. This dissertation analyzes the emulation results and depicts the relationship between the performance and the moving speed of the mobile devices. This relationship is used in a novel protocol, which is the second contribution, to improve the performance of MIP over Wireless LAN in rapid moving environments. The second contribution is the Speed Adaptive Mobile IP. In Speed Adaptive Mobile IP, Mobile Node’s registration message is extended by speed extension. With the speed information popularized in the mobile IP network, the behavior of Speed Adaptive Mobile IP will automatically adapt to the speed of the Mobile Node so that the