Fast Handover Between WiMAX and WiFi Networks in Vehicular Environment

Fast handover is crucial to provide the best services to mobile users in vehicular environment. WiMAX and WiFi support mobility in vehicular speed. However, WiMAX and WiFi network entry processes may take seconds to complete. In this paper, we propose the fast handover techniques between WiMAX and WiFi networks to speed up handover process. A link layer fast handover approach is proposed to realize fast link layer connectivity. An IP layer fast handover mechanism is proposed to achieve the high speed IP layer connectivity. The proposed fast handover protocols can be utilized to accomplish the seamless handover in vehicular communications.