Optimization of cell selection interval in forward link handover for broadband OFCDM packet wireless access

摘要

This paper investigates an optimum cell (sector) selection interval in the forward link handover for broadband OFCDM packet wireless access based on radio link level simulations that take into account instantaneous fading and shadowing variations. The simulation results clarify that the improvement in throughput with the fast cell selection tracking the fading variation is small in a broadband channel with an increasing number of paths when the average path-loss difference between two cells is above 2 dB. Nevertheless, we elucidate that optimum cell selection interval equals that for tracking the shadowing variation, i.e., approximately 100 msec considering fast mobility for reducing the degradation in throughput when the cell with lower received power is selected for shadowing variation. Consequently, it is shown that the throughput by employing cell selection with the selection interval of 100 msec is increased by approximately 5 and 15% compared to that with selection interval of 1 sec for the maximum Doppler frequency of 20 and 200 Hz, respectively.