摘要： 在协作通信网络中,信道条件较好的电池供电中继节点可能被频繁选择用于数据转发,导致电量快速消耗,甚至缩短网络生命周期。针对该问题,提出一种兼顾电池能耗、电池余量和信道状态信息的中继选择方法。根据节点电池能耗与电池余量的比值对链路的信噪比加权,选择加权后中继链路信噪比最大中继链路的源节点或中继节点发送数据。推导系统的平均转发信道容量和中断概率表达式,在此基础上的仿真结果表明,该方法在保证转发信道容量和中断性能的同时,能有效降低中继节点的电池能耗,延长协作通信网络的生命周期。

关键词: 电池能耗, 信道容量, 中断概率, 中继选择, 协作通信

Abstract: Due to the fast power consumption and even the reduction of network lifetime caused by the frequent data forwarding for the battery-dependent relay nodes with higher channel qualities in collaborative communication network,a relay selection method is proposed considering the battery energy consumption,remaining battery and the Channel State Information(CSI) simultaneously.The Signal to Noise Ratio(SNR) is weighted according to the ratio of battery energy consumption and remaining battery,then the source node or the relay node of the relay link with maximum weighted SNR is chosen to transmit the data.The average forwarding channel capacity and outage probability of the system are derived.On this basis,simulation results show that the proposed method can reduce the battery energy consumption of the relay nodes and extend the life cycle of collaborative communication network while guaranteeing the forward channel capacity and outage performance.

Key words: battery energy consumption, channel capacity, outage probability, relay selection, collaborative communication

中图分类号: 

• TN925