D2D通信中基于社交门限的最优中继选择方案

在基于设备直传(D2D)通信的中继系统中,提出了一种基于社交感知的增强型中继选择策略.该策略首先在D2D中继网络中引入社交门限值,对潜在中继用户进行筛选和过滤,从而有效降低了探测成本;然后利用最优停止理论实现了最优中继节点的选择.仿真结果表明,与已有中继选择策略相比,所提出的策略能够以较少的中继探测次数获得较高的系统性能收益,从而实现能耗与收益之间的折中.

An optimal relay selection strategy based on social threshold for relay-based D2D communications

In order to design a relay selection scheme with high spectrum and energy efficiency in a relay based Device-to-Device(D2D) communication system,this paper proposes a social-aware based optimal relay selection strategy. Based on the strength of social relationship between mobile users, the proposed scheme first introduces the concept of social threshold to filter the potential relay nodes to effectively reduce the cost of relay detection. Then optimal stopping theory is introduced to realize the optimal relay node se-lection. Simulation results demonstrate that compared with existing schemes,the proposed scheme can effec-tively reduce the number of probing times. Moreover,the proposed scheme can also improve the throughput gain of the whole system,which strikes a balance between energy consumption and system utility.