Dynamic handover scheme for WiMAX

Abstract

WiMAX is an emerging technology based on the 802.16 standards to provide high speed and broadband wireless access for mobile stations. Handover is a key operation influencing the quality of communication services. In this paper, the scheme of choosing the suitable base station with the best service for a mobile station in a WiMAX network is studied. A new scheme based on fuzzy logic is proposed to employ the important traffic criteria, including bandwidth, dropping rate, blocking rate, and signal strength. Finally, the simulation is used to investigate the performance of proposed scheme. The simulation results show that the proposed schemes have better performance than conventional schemes, and can achieve the higher bandwidth utilization, the lower blocking rate for new calls, and the lower dropping rate for handover calls. © 2009 Springer Berlin Heidelberg.