Resource Allocation for Device-to-Device (D2D) Communications of Uplink Multi-Cell Networks

Abstract

Device-to-Device (D2D) communications have attracted great attention in the underlaying cellular networks since it a promising way to improve the capacity, energy efficiency, spectral and latency performance of next-generation wireless networks. In order to alleviate the interference caused by D2D user equipment (DUE) and cellular user-equipment (CUE) in uplink multi-cell networks, the intra-cell and inter-cell interference are considered in this work to improve performance for D2D communication underlaying cellular network. This paper proposes a resource allocation scheme to formulate the resource allocation problem through optimization of the utility function, which eventually reflects the system performance concerning network throughput. The formulated optimization problem of maximizing network throughput while guaranteeing predefined service levels to cellular users is non-convex and hence intractable. Thus, the original problem is broken down into two stages. The first stage is the admission control of D2D users while the second one is the power control for each admissible D2D pair and its reuse partner. Our simulation results have indicated that the proposed scheme can offer near-optimal performance and outperforms the algorithms in the literature, in achievable throughput.