A Reinforcement Learning Approach to Optimize Energy Usage in RF-Charging Sensor Networks
Publication Name
IEEE Transactions on Green Communications and Networking
Abstract
We consider a Radio Frequency (RF)-charging network where sensor devices harvest energy from a solar-powered Hybrid Access Point (HAP) and transmit their data to the HAP. We aim to optimize the power allocation of both the HAP and devices to maximize their Energy Efficiency (EE), which is defined as the total received data (in bits) for each Joule of consumed energy. Unlike prior works, we consider the case where both the HAP and devices have causal knowledge of channel state information and their energy arrival process. We model the power allocation problem as a Two-layer Markov Decision Process (TMDP), where the first layer corresponds to the HAP and the second layer consists of devices. We then outline a novel, decentralized Q-Learning (QL) solution that employs linear function approximation to represent the large state space. The simulation results show that when the HAP and devices employ our solution, their EE is orders of magnitude higher than competing policies.
Open Access Status
This publication is not available as open access
Volume
5
Issue
1
Article Number
9266066
First Page
526
Last Page
539