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Graph Coloring Based Resource Sharing (GCRS) Scheme for D2D Communications Underlaying Full-Duplex Cellular Networks

Device-to-device (D2D) communications has gradually become a promising technique to support wireless peer-to-peer services and enhance the overall spectrum utilization. In the meantime, the full-duplex communication technique has also attracted significant research interest recently. In this paper, for the first time, we employ the D2D communication concept in a full-duplex cellular network. In such a scenario, the user equipments (UEs) are allowed to communicate between each other by reusing the spectrum resources of cellular uplinks and downlinks. However, this D2D underlaying full-duplex cellular scenario poses a new challenge for interference management. The complicated UE-to-UE interference among cellular links and D2D links self-interference at the base station can critically affect network performance. Therefore, we investigate the joint resource block assignment and transmit power allocation problem, in order to optimize the network performance and spectrum utilization. Furthermore, we use graph theory to model the investigated scenario and propose a novel graph coloring based resource sharing scheme to solve the joint optimization problem effectively with acceptable complexity. The performance of our scheme is evaluated through Monte-Carlo simulations.