Multi-User Scheduling for Network Coded Two-Way Relay Channel in Cellular Systems
There has been a growing interest on analog network coding which can improve system throughput and spectrum efficiency significantly in wireless systems. Two-way relay scenario is considered in the paper, where the Base Station (BS) and the relay are both equipped with multiple antennas, and each of K User Equipments (UEs) in the cell has a single antenna. A novel multi-user scheduling scheme is proposed for the analog network coded two-way relay channel, where UEs and BS can exchange information via an assisting relay node during two time slots. Because each UE with single antenna has poor transmission and reception capability, the scheduling scheme is carefully designed to decrease multi-user interference and optimize beamforming gain from BS to relay.