Wireless Charger Placement for Directional Charging

Wireless power transfer technology has witnessed huge development because of its convenience and reliability. This paper concerns the fundamental issue of wireless charger PLacement with Optimized charging uTility (PLOT), i.e., given a fixed number of chargers and a set of points where rechargeable...

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Vydáno v:	IEEE/ACM transactions on networking Ročník 26; číslo 4; s. 1865 - 1878
Hlavní autoři:	Haipeng Dai, Xiaoyu Wang, Liu, Alex X., Huizhen Ma, Guihai Chen, Wanchun Dou
Médium:	Journal Article
Jazyk:	angličtina
Vydáno:	New York IEEE 01.08.2018 The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Témata:	Algorithms approximation algorithm Approximation algorithms Charging Computer simulation Directional antennas directional charging Electronic devices Electronic equipment Greedy algorithms Performance evaluation Placement Software Software algorithms Wireless communication wireless power transfer Wireless power transmission Wireless sensor networks
ISSN:	1063-6692, 1558-2566
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Abstract	Wireless power transfer technology has witnessed huge development because of its convenience and reliability. This paper concerns the fundamental issue of wireless charger PLacement with Optimized charging uTility (PLOT), i.e., given a fixed number of chargers and a set of points where rechargeable devices can be placed with orientations uniformly distributed in the range of [0, 2π) positions and orientations of chargers such that the overall expected charging utility for all points is maximized. To address PLOT, we propose a 1 - 1/ε - ε approximation algorithm. First, we present techniques to approximate the nonlinear charging power and the expected charging utility to make the problem almost linear. Second, we develop a dominating coverage set extraction method to reduce the continuous search space of PLOT to a limited and discrete one without a performance loss. Third, we prove that the reformulated problem is essentially maximizing a monotone submodular function subject to a matroid constraint, and propose a greedy algorithm to address this problem. We conduct both simulation and field experiments to validate our theoretical results, and the results show that our algorithm can outperform comparison algorithms by at least 32.9%.
AbstractList	Wireless power transfer technology has witnessed huge development because of its convenience and reliability. This paper concerns the fundamental issue of wireless charger PLacement with Optimized charging uTility (PLOT), i.e., given a fixed number of chargers and a set of points where rechargeable devices can be placed with orientations uniformly distributed in the range of [0, 2π) positions and orientations of chargers such that the overall expected charging utility for all points is maximized. To address PLOT, we propose a 1 - 1/ε - ε approximation algorithm. First, we present techniques to approximate the nonlinear charging power and the expected charging utility to make the problem almost linear. Second, we develop a dominating coverage set extraction method to reduce the continuous search space of PLOT to a limited and discrete one without a performance loss. Third, we prove that the reformulated problem is essentially maximizing a monotone submodular function subject to a matroid constraint, and propose a greedy algorithm to address this problem. We conduct both simulation and field experiments to validate our theoretical results, and the results show that our algorithm can outperform comparison algorithms by at least 32.9%.
Author	Wanchun Dou Haipeng Dai Xiaoyu Wang Huizhen Ma Liu, Alex X. Guihai Chen
Author_xml	– sequence: 1 surname: Haipeng Dai fullname: Haipeng Dai email: haipengdai@nju.edu.cn organization: State Key Lab. for Novel Software Technol., Nanjing Univ., Nanjing, China – sequence: 2 surname: Xiaoyu Wang fullname: Xiaoyu Wang email: mg1633074@smail.nju.edu.cn organization: State Key Lab. for Novel Software Technol., Nanjing Univ., Nanjing, China – sequence: 3 givenname: Alex X. surname: Liu fullname: Liu, Alex X. email: alexliu@cse.msu.edu organization: State Key Lab. for Novel Software Technol., Nanjing Univ., Nanjing, China – sequence: 4 surname: Huizhen Ma fullname: Huizhen Ma email: mg1533037@smail.nju.edu.cn organization: State Key Lab. for Novel Software Technol., Nanjing Univ., Nanjing, China – sequence: 5 surname: Guihai Chen fullname: Guihai Chen email: gchen@nju.edu.cn organization: State Key Lab. for Novel Software Technol., Nanjing Univ., Nanjing, China – sequence: 6 surname: Wanchun Dou fullname: Wanchun Dou email: douwc@nju.edu.cn organization: State Key Lab. for Novel Software Technol., Nanjing Univ., Nanjing, China
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SubjectTerms	Algorithms approximation algorithm Approximation algorithms Charging Computer simulation Directional antennas directional charging Electronic devices Electronic equipment Greedy algorithms Performance evaluation Placement Software Software algorithms Wireless communication wireless power transfer Wireless power transmission Wireless sensor networks
Title	Wireless Charger Placement for Directional Charging
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