Chen, Lin and Zhang, Wentao and Kishk, Mustafa A. and Alouini, Mohamed-Slim
(2024)
Correlation of Line-of-Sight Probabilities in Aerial-Terrestrial Communications: Modeling, Analysis, and Application.
IEEE Transactions on Vehicular Technology, 73 (5).
pp. 7049-7065.
ISSN 0018-9545
Abstract
—The line-of-sight (LoS) condition is important to the
quality of wireless communications, especially for millimeter-wave
(mmWave) communications which are more sensitive to blockages
than typical radio frequency (RF) communications. Considering
that one blockage would obstruct several channels simultaneously,
recently, researchers have studied the correlation of LoS probabilities among multiple channels in the horizontal plane and
shown its importance in system performance analysis. The main
missing aspect of existing literature in this direction is that the
heights of transceivers and blockages have not been considered
in the analysis of the LoS correlation. However, the emerging
hybrid cellular networks with unmanned aerial vehicles (UAVs)
and reconfigurable intelligent surfaces (RISs) deployed at various
altitudes necessitate the LoS analysis accounting for the vertical
dimension. In this paper, using stochastic geometry, we formulate
a novel joint-LoS-probability framework of two channels among
three aerial/terrestrial devices to analyze the LoS correlation both
in the horizontal and vertical dimensions. We derive the expression
of the conditional and joint LoS probabilities. The proposed framework combines (i) accuracy (verified in simulation), (ii) generality
(from adjustable parameters of the channels and environments),
and (iii) fitting ability (from a cylindrical blockage model to a
non-cylindrical blockage model). The numerical results show that
the correlation is quite strong when the angle between the two
communication channels is small, while it becomes weaker as this
angle increases. Moreover, we introduce a potential application of
the joint LoS probability in the optimal deployment of an aerial
device. Compared to optimization based on the independence assumption of the LoS probabilities, the improvement in the coverage probability intuitively clarifies the advantage of the proposed
joint-LoS-pprobability framework on the aerial-terrestrial network
design.
| Item Type: |
Article
|
| Keywords: |
Joint line-of-sight (LoS) probability; blockage
correlation; stochastic geometry; aerial-terrestrial communications; unmanned aerial vehicle (UAV) deployment; |
| Academic Unit: |
Faculty of Science and Engineering > Electronic Engineering |
| Item ID: |
18624 |
| Identification Number: |
https://doi.org/10.1109/TVT.2023.3337423 |
| Depositing User: |
Mustafa Kishk
|
| Date Deposited: |
07 Jun 2024 15:09 |
| Journal or Publication Title: |
IEEE Transactions on Vehicular Technology |
| Publisher: |
Institute of Electrical and Electronics Engineers (IEEE) |
| Refereed: |
Yes |
| URI: |
|
| Use Licence: |
This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available
here |
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