摘要
研究基于无线能量补给的智能家居系统传输方案,利用中心节点(如改进的Wi Fi节点)向室内传感器节点进行无线能量补给,并联合优化能量信号传输时长与各个传感器节点的信息上报时长,在保障每个实时感知节点可以获得最低传输速率的前提下,最大化所有非实时感知节点的总传输速率。文中证明优化目标函数是能量传输时长的凹函数,并推导出给定能量传输时长下不同感知节点的最佳数据传输时长分配,进而提出基于黄金分割的最优求解算法。仿真结果表明,相比于现有的单独电池供电方案,引入无线充电可以显著提升系统总的可得传输速率,而相比于现有的单纯和速率最大化模型,所提方案可以更好地保障实时感知节点的数据成功传输。
The wireless powered smart home system was studied,in which the central node( CN),such as enhanced Wi Fi node,transfers energy and provides extra energy supply to deploy wireless sensing nodes( SNs). With the aim to maximize the total data transmission rate of all non-real-time SNs( nR-SNs) subject,the studied problem is mathematically formulated to proscribe minimum transmission rate requirements for each real-time SN( R-SN),by jointly optimizing the energy transmission duration and data transmission duration for SNs. We firstly proved that the objective function is a concave function of the energy transmission duration,derived the optimal duration allocation among SNs for data transmission,and proposed the optimal algorithm based on the golden section. Simulation results show that compared with the existing battery-only powered scheme,the introduction of wireless charging can markedly improve the tatal available transmission rate of system,and compared with the existing pure sum-rate-maximization model,the proposed scheme is preferably able to guarantee the successful data transmission for all R-SNs.
出处
《武汉理工大学学报》
CAS
北大核心
2016年第8期65-70,共6页
Journal of Wuhan University of Technology
基金
国家自然科学基金地区科学基金(61362008)
