A new scheduling algorithm and performance with opportunistic beamforming

In this paper, a novel scheduling algorithm named time-fair selective scheduling (TFS) is proposed and the performance of TFS with multi-antenna opportunistic beamforming is investigated. Simulation shows that time-fair selective scheduling yields better time fairness and better system performance than proportional fair scheduling in TDM cellular system. Furthermore, time-fair scheduling can avoid the phenomena that the user on the border of the cell does not allocate slots more effectively. TFS combined with opportunistic beamforming can exploit multiuser diversity even in slow fading channel. It is shown that opportunistic beamforming with more antennas would induce larger and faster fluctuation, but the performance decreases with too much antennas. The optimal number of antennas can be determined according to the results in this paper