Hysteresis plus Timer based Handover Initiation Algorithm for Microcellular Systems

摘要

This paper presents a new handover initiation algorithm based on relative signal strength measurements without averaging, and a timer. The performance metrics used are average number of handovers per cell boundary crossing, and handover initiation delay. Both of these, need to be minimized. Proposed algorithm was compared with the algorithms based on both hysteresis margin, and averaging of signal strength measurements. Our results show that the new algorithm yields the same performance as that obtained through the latter. Since the algorithm does not use averaging of the signal strength measurements, its implementation in real mobile systems is quite easy, which proves the usefulness of the proposed algorithm. Moreover, averaging always makes the handover process sluggish. The present algorithm does not use signal strength averaging. This fact yields a fast handover initiation algorithm, making it particularly suitable for implementation in microcellular systems.