Downlink resource allocation for Device-to-Device communication underlaying cellular networks

Device-to-Device (D2D) communication underlaying cellular networks can enhance the network capacity and spectrum efficiency when sharing cellular resources. However, the severe interference between D2D and cellular networks may lead to performance decrease of D2D and cellular communication. In this paper, we concentrate on suppressing the interference between D2D users and cellular networks when D2D communication reuses the cellular resources in downlink. An efficient resource allocation scheme is proposed to manage the interference between D2D and cellular networks. First, the mutual interference is restricted under the constraints by adopting the interference limited area control method. After that, the resources are assigned to D2D users to improve the sum rate of cellular communication and D2D communication. Besides, the simulation results are presented and analyzed. Finally, we conclude that the proposed scheme can significantly improve the total capacity of cellular and D2D communication, while at the same time suppressing the mutual interference.