Title: Performances analysis of UAV-assisted wireless powered sensor network

Authors: Jing Yan; Ruirui Yan; Liming Wang

Addresses: National Key Laboratory of Electronic Test Technology in North University of China, Taiyuan, Shanxi, 030051, China; School of Information Science and Engineering, Shanxi Agricultural University, Taigu, Shanxi, 030801, China ' Lvliang Power Supply Company, State Grid Corporation of China (SGCC), Lvliang, Shanxi, 033000, China ' National Key Laboratory of Electronic Test Technology in North University of China, Taiyuan, Shanxi, 030051, China

Abstract: Utilising radio frequency signals for wireless energy transmission is regarded as an effective method for energy-constrained sensor nodes to charge. Furthermore, unmanned aerial vehicle (UAV) has attracted increased attention because of their high flexibility and low-cost. We propose a novel UAV-assisted wireless rechargeable sensor network, where the energy-constrained sensors firstly harvest energy from the radio frequency signals of UAV and then forward the information to the sink node with harvesting energy. The closed-form expressions of system throughput and outage probability in AF and DF modes are both derived. Additionally, the theoretical derivation model is validated with simulation results. In particular, the results show that the DF protocol is superior to the AF protocol with lower probability and higher throughput. Besides, the influences of energy harvest time, the transmission power of UAV, and target signal-to-noise ratio on the throughput and outage probability are systematically analysed.

Keywords: WSN; wireless sensor network; UAVs; unmanned aerial vehicles; relay; outage probability; throughput.

DOI: 10.1504/IJSNET.2021.119484

International Journal of Sensor Networks, 2021 Vol.37 No.4, pp.233 - 243

Received: 06 Jan 2021
Accepted: 12 Feb 2021
Published online: 07 Dec 2021 *

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