Relay selection algorithm incorporated with prestige for D2D communication

For the sake of enabling the device-to-device (D2D) communication to impartially and effectively select the relay node, a prestige-based relay selection algorithm is proposed. From a social domain perspective,the prestige is used to describe the will and ability of an equipment to be selected as a relay. Meanwhile the data transmission of the equipment in different transmission modes is analyzed. Finally, a suitable relay is selected amongst the candidate relay equipments by the method of game theory. This algorithm avoids a device with a weak social relation and a low residual energy being selected as a relay. The results manifest that the proposed algorithm improves the throughput of the system, the coverage probability of D2D link, and the rationality of the relay selection, compared with the random selection algorithm and the maximum throughput algorithm.