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Fair Scheduling in Resonant Beam Charging for IoT Devices

Published on Feb 1, 2019in IEEE Internet of Things Journal9.52
· DOI :10.1109/jiot.2018.2853546
Wen Fang2
Estimated H-index: 2
(Tongji University),
Qingqing Zhang2
Estimated H-index: 2
(Tongji University)
+ 2 AuthorsPengfei Xia2
Estimated H-index: 2
(Tongji University)
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Abstract
Resonant beam charging (RBC) is the wireless power transfer (WPT) technology, which can provide high-power, long-distance, mobile, and safe wireless charging for Internet of Things (IoT) devices. Supporting multiple IoT devices charging simultaneously is a significant feature of the RBC system. To optimize the multiuser charging performance, the transmitting power should be scheduled for charging all IoT devices simultaneously. In order to keep all IoT devices working as long as possible for fairness, we propose the first access first charge (FAFC) scheduling algorithm. Then, we formulate the scheduling parameters quantitatively for algorithm implementation. Finally, we analyze the performance of FAFC scheduling algorithm considering the impacts of the receiver number, the transmitting power, and the charging time. Based on the analysis, we summarize the methods of improving the WPT performance for multiple IoT devices, which include limiting the receiver number, increasing the transmitting power, prolonging the charging time, and improving the single-user’s charging efficiency. The FAFC scheduling algorithm design and analysis provide a fair WPT solution for the multiuser RBC system.
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