D2D网络中基于联盟博弈的中继选择方法

Relay Selection Method Based on Coalition Game in D2D Networks

随着无线终端的大规模普及,用户设备(User Equipment,UE)对无线网络的内容分发服务提出了更高的要求。提出了利用设备对设备(Device to Device,D2D)通信技术进行协作中继传输,使得任何UE都可作为潜在中继节点,并且令中继节点为其他UE中继数据,可以提升整体网络的内容分发质量。为弥补UE作为中继节点产生的能耗,采用能量采集(Energy Harvesting,EH)的激励机制,将携能信号作为奖励发送至UE,以提高UE为其他用户中继数据的意愿。同时,为解决中继选择问题,提出了基于联盟博弈方法,对UE和中继节点的合作行为进行分析,为UE选取最优的中继节点,以获取最优的内容分发服务。仿真结果表明,所提方法与贪婪搜索算法相比,可以更大程度地提高系统的吞吐量。

With the massive spread of wireless terminals,UE(User Equipment)is placing greater demands on content distribution services of wireless networks.This paper proposes that when using D2D(Device to Device)communication technology for collaborative relay transmission,any UE can be used as a potential relay node and relay data for other UEs,which can improve the overall network content distribution quality.To compensate the energy consumption generated by UEs as relay nodes,EH(Energy Harvesting)incentive mechanism is used to send an energy-carrying signals to UEs as a reward to increase the willingness of UEs to relay data for other users.At the same time,to solve the relay selection problem,a coalition game-based approach is proposed,which analyzes the cooperative behavior between UEs and relay nodes,and selects the optimal relay node for UEs to obtain the optimal content distribution service.