Joint Mode Selection, VBS Association and Resource Allocation for Cellular D2D Communication Networks

Cellular device-to-device (D2D) communication networks are expected to improve user quality of service (QoS) and network transmission performance significantly. In this paper, we apply the technology of wireless network virtualization (WNV) to cellular D2D communication networks, mapping physical base stations (PBSs) into virtual BSs (VBSs), and jointly study mode selection, VBS association and resource allocation problem of the networks. To stress the importance of the service delay of all the UEs in the networks, we formulate the joint optimal design problem as a service delay minimization problem. As the formulated optimization problem is a NP-hard problem, which cannot be solved conveniently, we propose a heuristic algorithm, which iteratively conducts the steps including D2D transmission mode selection, UE and VBS matching, resource allocation and VBS association strategies. In particular, to solve the resource allocation subproblem and VBS association subproblem of UE-VBS pair, we apply Lagrange dual method and modified Kuhn-Munkres (K-M) algorithm, respectively. Simulation results demonstrate the effectiveness of the proposed algorithm.