HAPS Selection for Hybrid RF/FSO Satellite Networks

Yahia, Olfa Ben; Erdoğan, Eylem; Kurt, Güneş Karabulut; Altunbaş, İbrahim; Yanıkömeroğlu, Halim

doi:10.1109/taes.2022.3142116

Cited by 48 publications

(14 citation statements)

References 32 publications

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“…Therefore, in this setup (h = 500 km and mmWave cross-links with α = 5 • ), N * = 71 is the optimal number of satellites to be deployed to maximize the link performance, as obtained in (11). Furthermore, as N increases, we again observe that the SINR is eventually bounded by the SIR limit of 1.9 dB, as obtained in (10).…”

Section: B Single Orbitsupporting

confidence: 57%

“…Even though it may be unrealistic to consider so many satellites in an actual deployment, values of up to 200 satellites are analyzed to show the asymptotic behavior of the metric 2 . A dashed line is included at the theoretical bound derived in (10) (1.9 dB) for reference. The orbit altitude is set to 500 km, although as observed in ( 8) and later confirmed with simulations, the orbit 2 Although the existing constellations are still not reaching such densities today, there is a clear trend among the main LEO satellite service providers in growing the number of satellites per orbit, eventually reaching these transition points if the process continues as of today.…”

Section: B Single Orbitmentioning

confidence: 99%

“…Given the long propagation distances, both satellite-toground links (uplink and downlink) and inter-satellite links, also known as cross-links, require the use of such directional high-rate connectivity. Additionally being actively considered for cross-links is the optical spectrum, which offers rates greater than even THz channels, and could complement them when the adequate channel conditions are given [10], but…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Joint Terahertz Communication and Atmospheric Sensing in Low Earth Orbit Satellite Networks: Physical Layer Design

Aliaga

Alqaraghuli

Jornet

2022

2022 IEEE 23rd International Symposium on a World of Wireless, Mobile and Multimedia Networks (WoWMoM)

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High-rate satellite communications among hundreds and even thousands of satellites deployed at low-Earth orbits (LEO) will be an important element of the forthcoming sixthgeneration (6G) of wireless systems beyond 2030. With millimeter wave communications (mmWave, ≈30 GHz-100 GHz) completely integrated into 5G terrestrial networks, exploration of its potential, along with sub-terahertz (sub-THz, 100 GHz-300 GHz), and even THz (300 GHz-3 THz) frequencies, is underway for space-based networks. However, the interference problem between LEO mmWave/THz satellite cross-links in the same or different constellations is undeservedly forgotten. This article presents a comprehensive mathematical framework for modeling directional interference in all key possible scenario geometries. The framework description is followed by an indepth numerical study on the impact of cross-link interference on various performance indicators, where the delivered analytical results are cross-verified via computer simulations. The study reveals that, while highly directional mmWave and, especially, THz beams minimize interference in many cases, there are numerous practical configurations where the impact of crosslink interference cannot be neglected and must be accounted for.

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Section: B Single Orbitsupporting

confidence: 57%

Section: B Single Orbitmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Joint Terahertz Communication and Atmospheric Sensing in Low Earth Orbit Satellite Networks: Physical Layer Design

Aliaga

Alqaraghuli

Jornet

2022

2022 IEEE 23rd International Symposium on a World of Wireless, Mobile and Multimedia Networks (WoWMoM)

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“…With free-space optical (FSO) communications, several aerial nodes, e.g., HAPS systems, can form a powerful backbone network and enable ultra-low latency backhaul connectivity for aerial and terrestrial network elements. FSO systems are inherently secure and energy efficient while offering huge bandwidths [80]. To extend the coverage, a satellite platform can be employed for the backhaul traffic between the access and the core networks via point-to-point RF/FSO links.…”

Section: Technical Analysismentioning

confidence: 99%

Self-Evolving Integrated Vertical Heterogeneous Networks

Farajzadeh

Khoshkholgh²,

Yanıkömeroğlu

et al. 2023

IEEE Open J. Commun. Soc.

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“…In [8], the authors analyzed the performance of dual-hop SAGIN-based hybrid FSO/RF systems, both uplink and downlink, using an adaptive combining-based switching scheme. A novel HAP-assisted downlink SAGIN using hybrid FSO/RF communications was introduced in [9], in which the best HAP node was selected among multiple HAP nodes for relaying signals from the satellite. Different from [6]- [9], where decode-and-forward (DF) relaying scheme with constant data-rate transmissions were considered, the authors presented the design of rate adaptation hybrid FSO/RF links for HAP-based SAGIN using amplify-and-forward (AF) relaying scheme [10].…”

Section: A Related Work and Motivationmentioning

confidence: 99%

On the Design of RIS-UAV Relay-Assisted Hybrid FSO/RF Satellite-Aerial-Ground Integrated Network

Nguyen

Pham

2022

IEEE Trans. Aerosp. Electron. Syst.

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Satellite-aerial-ground integrated network (SAGIN) has been widely envisioned as a promising network architecture for 6G. In the SAGINs, high altitude platform (HAP)-aided relaying satellite systems using hybrid free-space optics (FSO)/radiofrequency (RF) communications have recently attracted research efforts worldwide. Nevertheless, the main drawback of hybrid FSO/RF systems is the restricted bandwidth of the RF connection, especially when the FSO one is blocked by cloud coverage. This paper explores a novel solution for the hybrid FSO/RF HAPbased SAGIN under the impact of weather and atmospheric conditions. Specifically, an additional unmanned aerial vehicle (UAV) is deployed to diverse the FSO link from the HAP-toground station to avoid cloud blockage while maintaining a highspeed connection of the FSO link. A mirror array constructed by re-configurable intelligent surface (RIS), an emerging technology, is mounted on the UAV to reflect the signals from the HAP. The channel model of RIS-UAV takes into account both atmospheric turbulence and hovering-induced pointing errors. Furthermore, we present a novel link switching design with a multi-rate adaptation scheme for the proposed network under different weather and turbulence conditions. Numerical results quantitatively confirm the effectiveness of our proposal. Additionally, we provide insightful discussions that can be helpful for the practical system design of RIS-UAV-assisted HAP-based SAGIN using hybrid FSO/RF links. Monte Carlo simulations are also performed to validate the accuracy of theoretical derivations.Index Terms-Satellite-aerial-ground integrated network (SA-GIN), high-altitude platform (HAP), unmanned aerial vehicle (UAV), re-configurable intelligent surface (RIS), hybrid FSO/RF links, multi-rate adaptation.

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HAPS Selection for Hybrid RF/FSO Satellite Networks

Cited by 48 publications

References 32 publications

Joint Terahertz Communication and Atmospheric Sensing in Low Earth Orbit Satellite Networks: Physical Layer Design

Joint Terahertz Communication and Atmospheric Sensing in Low Earth Orbit Satellite Networks: Physical Layer Design

Self-Evolving Integrated Vertical Heterogeneous Networks

On the Design of RIS-UAV Relay-Assisted Hybrid FSO/RF Satellite-Aerial-Ground Integrated Network

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