Round-robin resource sharing algorithm for device-to-device multicast communications underlying single frequency networks

Device-to-device (D2D) multicast communication is a useful way to improve the communication efficiency of user equipments which are located close to each other. In this paper, the frequency resource sharing problem of D2D multicast communications underlying single frequency network (SFN) system is investigated. Firstly, to avoid the interference between D2D and cellular communication and without consuming more frequency resources, we assume that D2D multicast groups do not share frequency with cellular user equipments (CUEs) in the same SFN, but reuse frequency with CUEs in other SFNs. Then, according to a pre-setting threshold of signal to interference ratio (SIR) of D2D communication, a reuse safe distance is confirmed. Finally, a round-robin resource allocation algorithm is proposed. Simulation results show that the proposed resource sharing algorithm can significantly reduce the outage probability of both D2D and cellular communication and enhance the throughput of system.