Wireless Power Transfer has become a commercially viable technology to charge devices because of the convenience of no power wiring and the reliability of continuous power supply. This paper concerns the fundamental issue of wireless charger placement with electromagnetic radiation (EMR) safety. Although there are a few wireless charging schemes consider EMR safety, none of them addresses the charger placement issue. In this paper, we propose PESA, a wireless charger Placement scheme that guarantees EMR SAfety for every location on the plane. First, we discretize the whole charging area and formulate the problem into the Multidimensional 0/1 Knapsack (MDK) problem. Second, we propose a fast approximation algorithm to the MDK problem. Third, we optimize our scheme to improve speed by double partitioning the area. We prove that the output of our algorithm is better than (1 - ϵ) of the optimal solution to PESA with a smaller EMR threshold (1 - ϵ/2)Rt and a larger EMR coverage radius (1 + ϵ/2)D. We conducted both simulations and field experiments to evaluate the performance of our scheme. Our experimental results show that in terms of charging utility, our algorithm outperforms the prior art by up to 45.7%.
|Original language||English (US)|
|Title of host publication||IEEE INFOCOM 2016 - 35th Annual IEEE International Conference on Computer Communications|
|Publisher||Institute of Electrical and Electronics Engineers Inc.|
|State||Published - Jul 27 2016|
|Event||35th Annual IEEE International Conference on Computer Communications, IEEE INFOCOM 2016 - San Francisco, United States|
Duration: Apr 10 2016 → Apr 14 2016
|Name||Proceedings - IEEE INFOCOM|
|Other||35th Annual IEEE International Conference on Computer Communications, IEEE INFOCOM 2016|
|Period||4/10/16 → 4/14/16|
Bibliographical noteFunding Information:
The work is partly supported by China 973 projects (2014CB340303, 2012CB316201), China NSF grants (61502229, 61472184, 61321491, 61472252, 61133006, 61321491, 613220428, 613300260), the Jiangsu Future Internet Program under Grant Number BY2013095-4-08, the Jiangsu High-level Innovation and Entrepreneurship (Shuangchuang) Program, and the Shanghai Recruitment Program of Global Experts.
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