Post-resource sharing power allocation in cellular networks to coexist with D2D underlay

Abstract

Device to Device communications (D2D) is considered as a key technology component in fifth generation (5G) of mobile communication, which anticipates higher user density and traffic volume than in present. D2D communication aims to offload base station from traffic routing by enabling direct link between communicating devices in proximity. D2D underlay allows a D2D pair to reuse resources with a cellular link, leading to better spectrum utilization. However, D2D transmission causes significant interference to cellular link with which it reuses physical resource block (PRB), thereby hindering cellular performance. Regulating D2D transmissions to mitigate the aforementioned problem would mean sub-optimal exploitation of D2D communications. As a solution, post-resource allocation power control at cellular users is proposed in this paper. Three schemes namely interference aware power control, blind power control and threshold based power control are discussed. Simulation results show reductions in dropping of cellular users due to interference from D2D transmissions, improvement in throughput at base station (uplink) while not hindering the D2D performance.

Non-Orthogonal Resource Sharing Optimization for D2D Communication in LTE-A Cellular Networks: A Fractional Frequency Reuse-Based Approach

“…It has been shown that the performance of the cellular network is affected by the interference caused by D2D communication. The work in [8] proposed a post-resource allocation and power control scheme for cellular users. Frequency reuse scenario is determined based on the interference generated by the D2D users.…”