基于D2D通信系统中的一种跨层中继选择算法

在D2D通信系统与蜂窝网络共存的场景下,引入中继节点可有效提高D2D链路的吞吐量和D2D用户对蜂窝用户的干扰。文中基于译码转发模式,结合跨层协作通信的思想,提出了一种基于物理层和数据链路层的跨层中继选择算法。该算法结合物理层的信道状态信息和数据链路层的队列状态信息,两个参数进行最优中继节点的选择。并最终通过仿真验证表明,基于跨层中继选择算法可提高通信系统的吞吐量,同时降低了通信系统的平均时延和数据包错误率。

A Cross-Layer Relay Selection Algorithm for D2D Communication System

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.