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Multi-Node Wireless Energy Charging in Sensor Networks

delete2015-04-01
delete148
PRE
AI
L
Liguang Xie *
Y
Yi Shi
Y
Y. Thomas Hou
W
Wenjing Lou
H
Hanif D. Sherali
S
Scott F. Midkiff
DOI：10.1109/TNET.2014.2303979delete
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Abstract

Abstract

En 中文
Wireless energy transfer based on magnetic resonant coupling is a promising technology to replenish energy to a wireless sensor network (WSN). However, charging sensor nodes one at a time poses a serious scalability problem. Recent advances in magnetic resonant coupling show that multiple nodes can be charged at the same time. In this paper, we exploit this multi-node wireless energy transfer technology and investigate whether it is a scalable technology to address energy issues in a WSN. We consider a wireless charging vehicle (WCV) periodically traveling inside a WSN and charging sensor nodes wirelessly. Based on charging range of the WCV, we propose a cellular structure that partitions the two-dimensional plane into adjacent hexagonal cells. We pursue a formal optimization framework by jointly optimizing traveling path, flow routing, and charging time. By employing discretization and a novel Reformulation-Linearization Technique (RLT), we develop a provably near-optimal solution for any desired level of accuracy. Through numerical results, we demonstrate that our solution can indeed address the charging scalability problem in a WSN.
Keywords:
Optimization
scalability
wireless energy transfer
wireless sensor network
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Journal

I
IEEE-ACM Transactions on Networking
IF:
3.6
Papers:
4.4K
Citations:
9.5K

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