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Article

Energy-Efficient Optimal Power Allocation for SWIPT Based IoT-Enabled Smart Meter

1
Department of Electrical Engineering, Chonnam National University, Gwangju 61186, Korea
2
Department of Artificial Intelligence Convergence, Chonnam National University, Gwangju 61186, Korea
*
Author to whom correspondence should be addressed.
Academic Editors: Carlo Trigona, Olfa Kanoun and Slim Naifar
Sensors 2021, 21(23), 7857; https://doi.org/10.3390/s21237857
Received: 27 October 2021 / Revised: 19 November 2021 / Accepted: 19 November 2021 / Published: 25 November 2021
This paper presents an internet of things (IoTs) enabled smart meter with energy-efficient simultaneous wireless information and power transfer (SWIPT) for the wireless powered smart grid communication network. The SWIPT technique with energy harvesting (EH) is an attractive solution for prolonging the battery life of ultra-low power devices. The motivation for energy efficiency (EE) maximization is to increase the efficient use of energy and improve the battery life of the IoT devices embedded in smart meter. In the system model, the smart meter is equipped with an IoT device, which implements the SWIPT technique in power splitting (PS) mode. This paper aims at the EE maximization and considers the orthogonal frequency division multiplexing distributed antenna system (OFDM-DAS) for the smart meters in the downlink with IoT enabled PS-SWIPT system. The EE maximization is a nonlinear and non-convex optimization problem. We propose an optimal power allocation algorithm for the non-convex EE maximization problem by the Lagrange method and proportional fairness to optimal power allocation among smart meters. The proposed algorithm shows a clear advantage, where total power consumption is considered in the EE maximization with energy constraints. Furthermore, EE vs. spectral efficiency (SE) tradeoff is investigated. The results of our algorithm reveal that EE improves with EH requirements. View Full-Text
Keywords: distributed antenna system; energy efficiency; energy harvesting; internet of things; smart grid; wireless power transfer distributed antenna system; energy efficiency; energy harvesting; internet of things; smart grid; wireless power transfer
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MDPI and ACS Style

Masood, Z.; Ardiansyah; Choi, Y. Energy-Efficient Optimal Power Allocation for SWIPT Based IoT-Enabled Smart Meter. Sensors 2021, 21, 7857. https://doi.org/10.3390/s21237857

AMA Style

Masood Z, Ardiansyah, Choi Y. Energy-Efficient Optimal Power Allocation for SWIPT Based IoT-Enabled Smart Meter. Sensors. 2021; 21(23):7857. https://doi.org/10.3390/s21237857

Chicago/Turabian Style

Masood, Zaki, Ardiansyah, and Yonghoon Choi. 2021. "Energy-Efficient Optimal Power Allocation for SWIPT Based IoT-Enabled Smart Meter" Sensors 21, no. 23: 7857. https://doi.org/10.3390/s21237857

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