Clustering and Relay Selection Method for Cellular Network-orientedD2D Multicast Communication br

In traditional cellular networks, the randomness and uncertainty of channel attenuation lead to poorreception performance for cell-edge users, especially for video transmission and other high-speed requirements,its drawbacks are more prominent. D2D (Device-to-Device) communication can be used as a beneficialsupplement to the traditional cellular network architecture because of its configuration flexibility, and theperformance of edge users can be improved effectively. Aiming at the multicast transmission of D2Dcommunication, the number of relays and the clustering algorithm are analyzed under the minimum delay costof the system, and a low-latency D2D multicast scheme is proposed based on clustering and relay selection.This scheme can adaptively select the number of relays in the multicast retransmission and the distance fromthe cluster center to the base station, and at the same time, it provides an optimal bandwidth resourceallocation mechanism. The simulation results show that compared with other schemes, the proposed strategycan effectively reduce the system delay and improve the edge user experience and system performane.