信能同传网络中基于能量的中继选择方法研究  

Research of relay selection based on energy for simultaneous wireless information and power transfer network

作　　者：闫静 叶婷[1] 彭乐钦 闫瑞瑞 Yan Jing;Ye Ting;Peng Leqin;Yan Ruirui(College of General Aeronautics,Xi′an Aeronautical Polytechnic Institute,Xi′an 710000,China;Xi′an Aerospace Propulsion Institute,Xi′an 710000,China;Lvliang Power Supply Company,State Grid Shanxi Electric Power Company,Lvliang 033000,China)

机构地区：[1]西安航空职业技术学院通航学院,陕西西安710000 [2]西安航天动力研究所,陕西西安710000 [3]国网山西省电力公司吕梁供电公司,山西吕梁033000

出　　处：《电子技术应用》2024年第8期71-75,共5页Application of Electronic Technique

基　　金：中国高校产学研创新基金(2022IT175);西安航空职业技术学院引进高层次人才科研启动基金(2023XHQDJ03)。

摘　　要：针对中继节点能量受限的无线信能同传中继网络,中继节点可以从源节点的射频信号补充能量,并采用中继选择的方法,来延长中继网络的生命时间。首先,构建了中继网络性能约束条件下的能量受限中继节点处最小额外能量的优化目标,并将优化目标分为三个子问题进行求解,提出了通过动态调整功率分离因子来最优化中继节点处所需最小额外能量的方法;其次,通过仿真验证了所求出最优功率分离因子的有效性;然后,基于中继节点需要消耗的电池能量以及电池剩余能量,提出了两种能量意识的中继选择方法,分别是最小损失能量策略和最小损失能量比率策略;最后,通过仿真表明,最小损失能量比率策略优于最小损失能量策略,延长了网络生存周期,并提升了系统性能。In a wireless signal-energy simultaneous relay network with limited energy at the relay node,the relay node can replenish its energy from the RF signal of the source node.A relay selection method is employed to prolong the lifespan of the relay network.Firstly,the optimization objective is conducted to minimize the additional energy at the energy-constrained relay node while considering the performance constraints of the relay network.This objective is divided into three sub-problems for resolution.A method is proposed to optimize the minimum additional energy needed at the relay node by dynamically adjusting the power separation factor.Secondly,the effectiveness of the optimal power separation factor is verified through simulation.Then,based on the battery energy consumed by the relay node and the remaining energy of the battery,two energy-conscious relay selection methods are proposed:the minimum loss energy strategy and the minimum loss energy ratio strategy.Finally,the simulation results show that the minimum energy loss ratio strategy is better than the minimum energy loss strategy.This approach prolongs the network lifetime and enhances system performance.

关 键 词：信能同传 中继网络 射频信号 中继选择 生命时间 

分 类 号：TN929.5[电子电信—通信与信息系统]