research-article

Energy Efficiency Maximization for UAV-Assisted Emergency Communication Networks

Authors:

Dongjun Ma Academic Editor:

Nagendra KumarAuthors Info & Claims

Wireless Communications and Mobile Computing, Volume 2021

https://doi.org/10.1155/2021/7595347

Published: 01 January 2021 Publication History

Abstract

Using unmanned aerial vehicles (UAVs) in emergency communications is a promising technology because of their flexible deployment, low cost, and high mobility. However, due to the limited energy of the onboard battery, the service duration of the UAV is greatly limited. In this paper, we study an emerging energy-efficient UAV emergency network, where a UAV works as an aerial base station to serve a group of users with different statistical quality-of-service (QoS) constraints in the downlink. In particular, the energy efficiency of the UAV is defined as the sum effective capacity of the downlink users divided by the energy consumption of the UAV, which includes the energy consumed by communication and the energy consumed by hovering. Then, we formulate an optimization problem to maximize the energy efficiency of the UAV by jointly optimizing the UAV’s altitude, downlink transmit power, and bandwidth allocation while meeting a statistical delay QoS requirement for each user. The formulated optimization problem is a nonlinear nonconvex optimization problem of fractional programming, which is difficult to solve. In order to deal with the nonconvex optimization problem, the following two steps are used. First, we transform the fractional objective function into a tractable subtractive function. Second, we decompose the original optimization problem into three subproblems, and then, we propose an efficient iterative algorithm to obtain the energy efficiency maximization value by using the Dinkelbach method, the block coordinate descent, and the successive convex optimization technique. Extensive simulation results show that our proposed algorithm has significant energy savings compared with a benchmark scheme.

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Cited By

Sun JSheng ZNasir AHuang ZYu HFang Y(2023)Energy efficiency maximization for WPT-enabled UAV-assisted emergency communication with user mobilityPhysical Communication10.1016/j.phycom.2023.10220061:COnline publication date: 1-Dec-2023
https://dl.acm.org/doi/10.1016/j.phycom.2023.102200

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Energy Efficiency Maximization for UAV-Assisted Emergency Communication Networks

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Published In

cover image Wireless Communications & Mobile Computing

Wireless Communications & Mobile Computing Volume 2021, Issue

2021

14355 pages

ISSN:1530-8669

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Copyright © 2021 Haibin Niu et al.

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Publisher

John Wiley and Sons Ltd.

United Kingdom

Publication History

Published: 01 January 2021

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Cited By

Sun JSheng ZNasir AHuang ZYu HFang Y(2023)Energy efficiency maximization for WPT-enabled UAV-assisted emergency communication with user mobilityPhysical Communication10.1016/j.phycom.2023.10220061:COnline publication date: 1-Dec-2023
https://dl.acm.org/doi/10.1016/j.phycom.2023.102200

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