Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

3D Placement of a New Tethered UAV to UAV Relay System for Coverage Maximization

Version 1 : Received: 3 December 2021 / Approved: 6 December 2021 / Online: 6 December 2021 (11:19:33 CET)

A peer-reviewed article of this Preprint also exists.

Journal reference: Electronics 2022
DOI: 10.3390/electronics11030385


In this paper, a new relay system that uses the UAV as a relay station between the tethered UAV and ground user (TU2U2G) is proposed. The TU2U2G system replaces the base station (BS) in the cellular system with a tethered UAV (TUAV). The TUAV is a UAV that receives power over a cable from a ground control station. It has advantages of high and variable altitude up to (100m) compared to BS. In addition, it overcomes the UAV drawback of the batteries' limited capacity. After that, a 3D placement Algorithm of the UAV as a relay station in the TU2U2G system is proposed. It is presented to maximize the coverage by jointly optimizing the transmitting power and relaying distance. The TU2U2G system shows better results than the traditional cellular system in terms of optimum UAV height, maximum coverage radius, and maximum distance between BS and UAV.


UAV network; Tethered UAVs; Placement Algorithms


ENGINEERING, Electrical & Electronic Engineering

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