Handoff Optimization in 802.11 Wireless Networks
In 802.11 wireless networks, a complete handoff procedure for a mobile node requires Access Point (AP) selection, AP switch, Call Admission Control (CAC), IP address re-allocation, and network re-configuration. Most current handoff schemes deal only with either AP selection or IP address re-allocation. In this paper, an integrated handoff procedure is proposed. First, AP selection is accomplished by choosing an AP with the lowest channel utilization and smaller number of associated users. The information about load of each AP is reported through modified beacon frames.