一种基于设备效用值的中继选择算法

A relay selection algorithm based on device utility value

对于非正交多址接入(NOMA)协作网络,传统的基于最佳距离选择、最大中继速率的中继选择算法虽然可以提高系统运行效率,但都忽视了设备效用问题。因此,提出了一种基于设备效用值的D2D通信中继选择算法。该算法综合考虑中继通信速率、设备位置及设备能耗等多种因素,将中继设备原有电量和协作转发后的剩余电量作为衡量指标。仿真结果表明,在D2D实际应用场景中,与传统算法相比,采用基于设备效用值的中继选择算法,通信系统吞吐量更高。

According to non-orthogonal multiple access(NOMA)cooperative network,the traditional relay selection algorithms,such as the best distance selection algorithm and the maximum relay rate algorithm,can improve the system efficiency,but the equipment utility problem is ignored.Therefore,a relay selection algorithm is proposed for end-to-end communication based on device utility value.This algorithm takes into account the relay communication rate,the device location and the energy consumption,and takes the original power of the relay device and the remaining power after the cooperative transmission as the indexes.The simulation results show that the relay selection algorithm based on device utility value has higher throughput than the traditional algorithms in D2D application scenarios.