TDMA in Adaptive Resonant Beam Charging for IoT Devices

TL;DR

This paper introduces a TDMA-based scheduling algorithm for adaptive resonant beam charging, enabling efficient multi-user wireless power transfer with features like concurrent charging and individual power control.

Contribution

It proposes a novel TDMA method and scheduling algorithm for ARBC systems, significantly improving charging efficiency and supporting multi-user WPT.

Findings

Charging time reduced by 53.1% with TDMA

Supports concurrent and individual power control

Inspires enhancements like flow control and QoS

Abstract

Resonant beam charging (RBC) can realize wireless power transfer (WPT) from a transmitter to multiple receivers via resonant beams. The adaptive RBC (ARBC) can effectively improve its energy utilization. In order to support multi-user WPT in the ARBC system, we propose the time-division multiple access (TDMA) method and design the TDMA-based WPT scheduling algorithm. Our TDMA WPT method has the features of concurrently charging, continuous charging current, individual user power control, constant driving power and flexible driving power control. The simulation shows that the TDMA scheduling algorithm has high efficiency, as the total charging time is roughly half (46.9% when charging 50 receivers) of that of the alternative scheduling algorithm. Furthermore, the TDMA for WPT inspires the ideas of enhancing the ARBC system, such as flow control and quality of service (QoS).