无线传感器网络RCF-MAC协议研究

射频充电（ RFC）技术是一种通过基站发射射频电波为传感器节点补充电量的新兴技术。但在RFC无线传感器网络中，多基站同时发射能量时产生的能量干涉衰减现象会明显降低充电效率，此外，能量传输与数据通信共享信道会降低整个网络的吞吐量。针对上述问题，提出了RFC—MAC协议，为提高充电效率，将请求充电传感器节点周围的基站按距离分为两组，两组基站分时能量传输，以避免能量干涉衰减现象；传感器网络中设双信道，分别用于能量传输与数据通信，以提高网络的吞吐量。仿真结果表明：RFC—MAC协议显著提高了传感器节点的充电效率和平均网络吞吐量。

Research on RFC-MAC protocol for WSNs

Radio frequency charging(RFC)technology is an emerging technology that through base station emit RF waves to replenish power for sensor node. However,in RF charging( RFC)wireless sensor networks( WSNs), energy interference and attenuation caused by more than one base stations emitting energy at the same time can significantly reduce charging efficiency,moreover,energy transmission shares the channel with data communication can reduce network throughput. Aiming at above problems,put forward RFC—MAC protocols,ambient base stations of charging sensor node are classified into two groups,based on estimates of their separation distance from the energy requesting node to avoid phenomenon of energy interference decay as much as possible;set double channels in sensor networks for power transmission and data communications to improve network throughput. The simulation results show that RFC—MAC protocol can significantly improve charging efficiency of sensor node and average network throughput.