Abstract：A delay minimization retransmission scheme based on an instantly decodable network coding is proposed to solve the conflict problem when multiple devices cooperatively retransmit in Device-to-Device (D2D) wireless networks concurrently. In retransmission stage, making full use of multiple devices cooperative transmission advantages in D2D wireless network, combined with the packet receiving state of each devices, taking all of the influence factors of delay into account, and then the packets with smaller incremental delay for each retransmission are selected to generate encoding packets to minimize the retransmission delay. At the same time, the devices conflict graph is constructed and the maximal independent set is searched in the graph. According to the encoding package weight value of each device, the maximum weighted independent set are selected as the concurrent cooperative retransmission devices to reduce the number of retransmission. Simulation results show that the proposed scheme can further improve the retransmission efficiency of D2D wireless network.
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