能量捕获传感网中吞吐量最大化的占空比方案  

Duty Cycle Scheme Maximizing Throughput in Energy Harvesting Sensor Networks

作　　者：池凯凯[1] 林一民[1] 李燕君[1] 程珍[1] CHI Kai-kai;LIN Yi-min;LI Yan-jun;CHENG Zhen(School of Computer Science and Technology,Zhejiang University of Technolog)

机构地区：[1]浙江工业大学计算机科学与技术学院,杭州310023

出　　处：《计算机科学》2018年第6期100-104,共5页Computer Science

基　　金：国家自然科学基金(61472367;61432015;61379124)资助

摘　　要：对于以超级电容为储能设备且工作在占空比模式下的能量捕获传感网,其节点的平均能量捕获速率和吞吐量均很大程度上取决于节点开始休眠时的电容电压和醒来工作时的电容电压。首先,通过理论分析证明传感器节点的能量捕获速率很大程度上取决于电容的即时电压值;然后,对节点的最大吞吐量问题进行建模;最后,提出一种最优化方案来确定开始休眠时的电容电压和醒来工作时的电容电压的最佳取值,从而最大化节点的吞吐量。实验表明,所提方案的吞吐量比已有占空比方案的吞吐量有明显的提高。For energy harvesting wireless sensor networks（EH-WSNs）working under the extremely low-duty-cycle mode and using the super capcitor as energy storage device,both the average energy harvesting rate and the throughput of node greatly depend on the capacitor voltage when it begins to sleep and wakes up.This paper firstly demonstrated that the energy harvesting rate significantly depends on the instant capacitor voltage through the theoretical analysis,then formulated the maximal node throughput problem and finally provided an approach to solve this problem for obtaining the optimal values of capacitor voltage to start sleeping and capactior voltage to wake up.Numerical results show that the throughput of the duty-cycle-optimized scheme is significantly larger than that of the available duty-cycle schemes.

关 键 词：能量捕获无线传感网 占空比 能量捕获速率 吞吐量最优化 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]