Fair Scheduling in Resonant Beam Charging for IoT Devices

TL;DR

This paper introduces a fair scheduling algorithm for resonant beam wireless power transfer to optimize charging for multiple IoT devices, ensuring fairness and efficiency in multi-user scenarios.

Contribution

The paper proposes the FAFC scheduling algorithm and analyzes its performance, addressing fairness in multi-user wireless power transfer for IoT devices.

Findings

FAFC algorithm ensures fair charging among multiple IoT devices.

Performance depends on receiver number, power, and charging time.

Methods to improve WPT include increasing power and prolonging charging.

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 multi-user 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 multi-user RBC system.