Joint Social, Energy and Transfer Rate Cluster Head Selection Strategy for D2D Multicast Communication

Content sharing among users through Device-to-Device (D2D) multicast communication is an attractive solution to offload the mobile traffic. To achieve stable and effective sharing of content among nearby users, how to select D2D multicast cluster heads (DMCHs) is important. In this paper, a D2D multicast cluster head selection strategy based on Chinese Restaurant Process (CRP) is proposed. Firstly, in order to establish stable D2D multicast links, some requesting users (RUs) are classified as D2D multicast users (DMUs) taking account of their mobility. Secondly, to help the base station (BS) distributing data to DMUs effectively, DMCHs are selected from DMUs jointly considering DMUs' social attributes, available energy of their devices and the transfer rate from the BS to DMUs. At last, simulation results show that the proposed strategy can not only improve throughput, but also reduce the energy consumption and the transmission delay.