能量收集中继网络的中继选择算法研究

摘要

Harvesting energy from the surrounding environment is an effective way to replenish energy in energy-constrained wireless networks.An energy-aware distributed relay selection algorithm(MHE) is proposed to improve the reliability of information transmission.Firstly,the algorithm compares the energy-constrained relay nodes' energy to select cooperative relay.Then,the selected relay node forwards the amplified information with the energy harvesting from the source's RF signal.Finally,the throughput of the system with proposed algorithm is gotten and it's proved that the proposed selection protocols indeed can improve the system performances through theory.Simulation results have verified the analysis and theorems.%从周围环境收集能量是解决能量受限无线网络中能量补给问题的一种有效方法.为了提高中继网络信息传输的可靠性,提出了一种能量意识的分布式中继选择算法(MHE).首先,算法通过比较所有能量受限中继节点收集的能量来实现协作中继的选择.而后,协作中继使用从源节点射频信号收集的能量将放大的源节点信息转发到目的节点.最后,推导出采用本算法时系统吞吐量的解析表达式,并通过理论和仿真证明所提出的选择协议确实可以提高系统性能.仿真结果验证了分析和定理的正确性.