An adaptive resource allocation scheme for device-to-device communication underlaying cellular networks

Abstract

Device-to-Device (D2D) communication as a promising part of next generation wireless networks improves network performance by enabling direct communication between nearby mobile devices. However, as an underlay to cellular network, the resulting co-channel interference degrades the system performance, if available resources are not adequately allocated for D2D pairs. In this paper, we formally state the uplink resource allocation problem of maximizing system sum-rate while taking the signal-to-interference-plus-noise ratio (SINR) constraints into account for each user. A centralized scheme is proposed in which in contrast to existing works a D2D user equipment (DUE) is allowed to reuse resources of more than one cellular user equipment (CUE), and a resource of CUE is allowed to be shared by multiple DUEs. According to this approach, both CUEs and DUEs make probabilistic resource sharing decisions by taking advantage of a concept namely, Adaptive Interference Restricted Region (AIRR). Simulation results show that our proposed approach, exhibits a near-optimal sum-rate, and outperforms existing related schemes.