无线能量收集协作系统的节能中继选择方法

Energy-saving Relay Selection Method in Wireless Energy Harvesting Cooperative System

在无线能量收集协作通信系统中,针对中继处可能出现的能量瓶颈,提出优化源节点和中继的传输功率的节能中继选择方法。利用源节点与中继之间发射功率的比例关系计算源节点的发射功率,选择信道容量最大的中继链路进行数据转发,并考虑源节点与中继的发射功率约束。在此基础上,推导系统的平均信道容量和中断性能。仿真结果表明,该方法可显著提高系统能量效率,节约源节点的能量消耗。

In the wireless Energy Harvesting (EH) cooperative communication system,the energy bottleneck may occur at the relay.For this problem,an energy-saving relay selection method for optimizing transmission power between source node and relay is proposed.Use the proportion of transmission power between the source node and the relay to calculate the transmission power of the source node,select the relay link with the maximum channel capacity for data forwarding,and consider the transmission power constraints of the source node and the relay.On this basis,the average channel capacity and outage performance of the system are deduced.Simulation results show that the proposed method can significantly improve the energy efficiency of the system,and simultaneously save energy consumption of the source.