Device-to-device cluster assisted downlink video sharing — A base station energy saving approach

In this paper, we focus on a Device-to-device (D2D) cluster assisted cellular communication in video stream sharing scenario. A solution for energy saving in base station (BS) for downlink transmission is proposed with constraint on D2D cluster´s energy consumption. We take peak signal-to-noise ratio (PSNR) as the measurement for video quality and consider both the downlink transmission energy and reception energy. In particular, forming D2D clusters with the distributed merge-and-split algorithm is adopted from the perspective of coalition game theory, and a relaxation factor is defined to give a constraint on total energy consumption for each cluster. Simulation results show a considerable amount of energy saving at BS in the proposed D2D cluster assisted cellular network for video stream sharing problem.