Scheduling schemes for interference suppression in millimeter-wave cellular network

Millimeter-wave communication is deemed to be one of the promising solutions to meet the growing traffic explosion for the next generation wireless communication system. The compact design of millimeter-wave antenna makes it possible to form large number of narrow beams to cover a certain area. However, the number of beams that can be scheduled simultaneously is not as many as possible due to the hardware restriction of millimeter-wave. In this paper we proposed two beam scheduling schemes, namely Signal to Interference plus Noise Ratio (SINR) based scheduling scheme and Signal to Leakage plus Noise Ratio (SLNR) based scheduling scheme, targeting to suppress the interference between beams within one millimeter-wave pico station. The numerical simulation results indicate that the two proposed schemes significantly outperform the classical round robin scheduling scheme and proportionally fair scheduling schemes at both 28GHz and 72GHz frequency. The SINR based scheduling scheme achieves a gain about 120% at 28GHz and a gain about 75% at 72GHz respectively over the round robin scheduling scheme, in terms of cell average spectrum efficiency. The SLNR based scheduling scheme achieves a gain about 70% at 28GHz and a gain about 250% at 72GHz respectively over the round robin scheduling scheme, in terms of the cell-edge spectrum efficiency¹.