Energy-Efficient 3-D Placement of an Unmanned Aerial Vehicle Base Station With Antenna Tilting

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In this letter, we investigate the energy-efficient 3D placement of an unmanned aerial vehicle mounted base station (UAV-BS) that is capable of tilting its directional antenna. We attempt to find the optimal UAV-BS 3D location to support ground users, with minimum UAV-BS energy consumption. The 3D placement problem can be converted into a 2D placement problem without any loss of optimality, by obtaining the minimum altitude based on the elliptical characteristics produced by the tilted antenna. To solve the 2D placement problem, the gradient descent algorithm (GDA) is applied. Our simulation results show that the GDA performs very close to the 2D exhaustive search method, for finding the optimal UAV-BS placement. Furthermore, significant energy savings are achieved using the proposed antenna tilt method, compared to the benchmark schemes.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2020-06
Language
English
Article Type
Article
Citation

IEEE COMMUNICATIONS LETTERS, v.24, no.6, pp.1323 - 1327

ISSN
1089-7798
DOI
10.1109/LCOMM.2020.2979437
URI
http://hdl.handle.net/10203/275494
Appears in Collection
EE-Journal Papers(저널논문)
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