CAJ | 학술논문

针对当前 WSN功率控制算法运算量大、需精确定位且不适用移动网络等问题,提出了一种基于链路质量指示(Link Quality Indication,LQI)的动态功率控制方案.接收节点根据LQI及发送节点的发送功率来计算发送节点的最优发送功率,并采用三次指数平滑算法对 LQI进行平滑预测,改善了 LQI波动较大的缺陷.Matlab 在线建模仿真证明了功率控制策略的正确性,并利用库仑计对JN5148节点的动态功率控制方案进行测试,实验结果表明,网络功耗降低了15．3％.
침대당전 WSN공솔공제산법운산량대、수정학정위차불괄용이동망락등문제,제출료일충기우련로질량지시(Link Quality Indication,LQI)적동태공솔공제방안.접수절점근거LQI급발송절점적발송공솔래계산발송절점적최우발송공솔,병채용삼차지수평활산법대 LQI진행평활예측,개선료 LQI파동교대적결함.Matlab 재선건모방진증명료공솔공제책략적정학성,병이용고륜계대JN5148절점적동태공솔공제방안진행측시,실험결과표명,망락공모강저료15．3％.
To solve power control algorithm’s drawbacks of a large amount of computation,high precision positioning and non-applicabili-ty for mobile network,the scheme of dynamic power control based on link quality indication (LQI)is proposed.The receiving node calcu-lates the optimal power level of the sending node according to LQI and transmission power.Three exponential smoothing is used to fore-cast LQI which improves the drawback of LQI fluctuation.Matlab simulation based on online modeling proves the validity of the power control strategy.The experiment platform based on JN5148 tests the scheme of dynamic power control with coulometer,and the results show that the network power is reduced by 1 5 .3%.