Title
An Energy Efficient Framework for UAV-Assisted Millimeter Wave 5G Heterogeneous Cellular Networks
Abstract
We study downlink transmission in a multi-band heterogeneous network comprising unmanned aerial vehicle (UAV) small base stations and ground-based dual mode mmWave small cells within the coverage area of a microwave ( <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\mu W$ </tex-math></inline-formula> ) macro base station. We formulate a two-layer optimization framework to simultaneously find efficient coverage radius for the UAVs and energy efficient radio resource management for the network, subject to minimum quality-of-service and maximum transmission power constraints. The outer layer derives an optimal coverage radius/height for each UAV as a function of the maximum allowed path loss. The inner layer formulates an optimization problem to maximize the system energy efficiency (EE), defined as the ratio between the aggregate user data rate delivered by the system and its aggregate energy consumption (downlink transmission and circuit power). We demonstrate that at certain values of the target SINR <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\tau $ </tex-math></inline-formula> introducing the UAV base stations doubles the EE. We also show that an increase in <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\tau $ </tex-math></inline-formula> beyond an optimal EE point decreases the EE.
Year
DOI
Venue
2019
10.1109/TGCN.2019.2892141
IEEE Transactions on Green Communications and Networking
Keywords
DocType
Volume
Resource management,Optimization,5G mobile communication,Downlink,Bandwidth,Propagation losses,Heterogeneous networks
Journal
3
Issue
Citations 
PageRank 
1
7
0.45
References 
Authors
0
6
Name
Order
Citations
PageRank
Jacob Chakareski153258.87
Syed Naqvi270.45
Nicholas Mastronarde324026.93
Jie Xu422219.44
Fatemeh Afghah513827.97
Abolfazl Razi613719.63