A Noval Fast Resource Allocation Scheme for D2D-enabled Cellular Networks

In this paper, we investigate the resource allocation for device-to-device (D2D) communications with underlaying cellular networks. Specifically, in underlay mode, D2D communications optimize for maximizing the corresponding utility under cellular users' quality of service (QoS) requirement and transmit power constraints. To solve this challenging subchannel allocation problem, which is actually a nonconvex mixed-integer programming problem, we decompose the whole optimization problem into independent subproblems. Firstly, we find out the candidate D2D communications users who are permitted to share the same spectrum with cellular users in the admission control subproblem. Then, to solve the resource allocation subproblem, a novel fast and tradeoff subchannel allocation algorithm between utility and fairness is proposed with setting higher priority for unpopular D2D users. Simulation results validate our proposed novel fast allocation strategy achieves remarkable improvement with low complexity and fairness guaranteeing.