TY - JOUR
T1 - Energy Optimization of a Laser-Powered Hovering-UAV Relay in Optical Wireless Backhaul
AU - Bashir, Muhammad Salman
AU - Alouini, Mohamed Slim
N1 - Funding Information:
This work was supported by the Office of Sponsored Research (OSR) at the King Abdullah University of Science and Technology (KAUST).
Publisher Copyright:
© 2002-2012 IEEE.
PY - 2023/5/1
Y1 - 2023/5/1
N2 - Due to their flexibility and low cost deployment, unmanned aerial vehicles (UAV) will most likely act as base stations and backhaul relays in the next generation of wireless communication systems. However, these UAVs - in the untethered mode - can only operate for a finite time due to limited energy they carry in their batteries. In free-space optical communications, one solution is to transport both data and energy from the source to the UAV through the laser beam - a concept known as simultaneous lightwave information and power transfer (SLIPT). In this study, we have analyzed the SLIPT scheme for laser-powered decode-and-forward UAV relays in an optical wireless backhaul. The major goal of this study is to optimally allocate the received beam energy between the decoding circuit, the transmitting circuit and the rotor block of the relay in order to maximize a quality-of-service metric such as maximum achievable rate, outage or error probabilities. As expected, we note that the optimal power allocation depends heavily on the source-relay and relay-destination channel conditions. In the final part of this study, we have maximized the operational time of the UAV relay given that the maximum achievable rate stays above a certain threshold in order to meet a minimum quality-of-service requirement.
AB - Due to their flexibility and low cost deployment, unmanned aerial vehicles (UAV) will most likely act as base stations and backhaul relays in the next generation of wireless communication systems. However, these UAVs - in the untethered mode - can only operate for a finite time due to limited energy they carry in their batteries. In free-space optical communications, one solution is to transport both data and energy from the source to the UAV through the laser beam - a concept known as simultaneous lightwave information and power transfer (SLIPT). In this study, we have analyzed the SLIPT scheme for laser-powered decode-and-forward UAV relays in an optical wireless backhaul. The major goal of this study is to optimally allocate the received beam energy between the decoding circuit, the transmitting circuit and the rotor block of the relay in order to maximize a quality-of-service metric such as maximum achievable rate, outage or error probabilities. As expected, we note that the optimal power allocation depends heavily on the source-relay and relay-destination channel conditions. In the final part of this study, we have maximized the operational time of the UAV relay given that the maximum achievable rate stays above a certain threshold in order to meet a minimum quality-of-service requirement.
KW - Decode-and-forward relay
KW - energy harvesting
KW - error probability
KW - free-space optics
KW - hovering unmanned aerial vehicle
KW - laser-powered unmanned aerial vehicle
KW - maximum achievable rate
KW - optimal power allocation
KW - outage probability
KW - simultaneous lightwave information and power transfer
UR - http://www.scopus.com/inward/record.url?scp=85141550728&partnerID=8YFLogxK
U2 - 10.1109/TWC.2022.3216797
DO - 10.1109/TWC.2022.3216797
M3 - Article
AN - SCOPUS:85141550728
VL - 22
SP - 3216
EP - 3230
JO - IEEE Transactions on Wireless Communications
JF - IEEE Transactions on Wireless Communications
SN - 1536-1276
IS - 5
M1 - 9933172
ER -