关键词: D2D通信, 跨层, 中继选择, 信道状态信息, 队列状态信息

Abstract:

The introduction of relay nodes can effectively improve the D2D link throughput and D2D user interference where the D2D communication system and the cellular network coexist.We present a cross layer relay selection algorithm which combines the physical layer and data link layer,and a program of relay selection by cross-layer based on Decode and Forward model is proposed.The algorithm selects the optimal relay node through analysis of the channel state information at the physical layer and queue state information at the data link layer.Simulation results show that the proposed cross-layer relay selection algorithm improves the throughput of the communication system and reduces the average transmission delay and packet error probability.

Key words: D2D communication;cross layer;relay selection;channel state information;queue state information