Interference Mitigation by Switching the Underlaying Transmitter in Device-to-Device Communications

Device-to-Device (D2D) communication is essential for successful implementation of 5th generation (5G) communication networks. D2D communication allows bypassing the enhanced-Node B (eNB) and directly communicating with each other. However it induces interference to the cellular users (CUs) in the D2D enabled cellular network. Controlling the transmission power of D2D users is one of the solutions that maximizes cell throughput, while considering signal-to-noise-plus-interference ratio (SINR) for the CUs at the eNB. This paper proposes a scheme of power control by switching the D2D transmitter on the basis of D2D receiver-sensitivity. Simulation results, have been used to demonstrate the performance improvement, when the proposed scheme is used under the assumptions that the instantaneous channel state information (CSI) and D2D receiver-sensitivity is available at the eNB, and that the D2D pairs are stationary. The proposed scheme is valid for the uplink channel parameters considering communication between eNB and CU. Further, it is also shown that the proposed scheme offers significant increase in the cell sum-rate compared to conventional cellular network infrastructure without any major reduction of SINR performance for the CUs.