Physical Layer Security in Hybrid Satellite-Terrestrial Relay Networks

Bankey, Vinay; Upadhyay, Prabhat K.; Costa, Daniel Benevides da

doi:10.1007/978-3-030-55366-1_1

Cited by 5 publications

(4 citation statements)

References 43 publications

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“…The satellite to UAV link undergoes a shadowed-Rician fading, where the probability density function (PDF) of |h s | 2 is [27]:…”

Section: B Channel Statisticsmentioning

confidence: 99%

“…In [26], the authors investigated the outage probability of HSTN NOMA-based system, at which one user receives its signal directly from the satellite, while the other user relies on a multiple antenna DF relay. Further, the secrecy outage probability (SOP) of the HSTRN was investigated in [27] using physical layer security (PLS) technique in the presence of multiple eavesdroppers.…”

Section: Introductionmentioning

confidence: 99%

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Performance of Hybrid Satellite-UAV NOMA Systems

Gamal

et al. 2022

ICC 2022 - IEEE International Conference on Communications

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This paper investigates the performance of nonorthogonal multiple access (NOMA) based hybrid satelliteunmanned aerial vehicle (UAV) systems, where a low Earth orbit (LEO) satellite communicates with the ground users via a decode and forward (DF) UAV relay. We investigate a two NOMA users system, where a far user (FU) and a near user (NU) are served by the UAV which is located at a certain height above the origin of the coverage circle. The channel between satellite and UAV is assumed to follow a Shadowed-Rician fading and the channels between UAV and users are assumed to follow a Nakagami-m fading. New closedform expressions of the outage probabilities for the two users and the system are derived. Different from other work in literature, we take into consideration different parameters affecting the total link budget. Additionally, we propose an algorithm for minimizing the system outage probability. The mathematical analysis is verified by extensive representative Monte-Carlo (MC) simulations. Finally, simulations are provided to demonstrate the impact of important parameters on the considered system as well as the superiority of the NOMA scheme the over reference scheme.

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“…The satellite to UAV link undergoes a shadowed-Rician fading, where the probability density function (PDF) of |h s | 2 is [27]:…”

Section: B Channel Statisticsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Performance of Hybrid Satellite-UAV NOMA Systems

Gamal

et al. 2022

ICC 2022 - IEEE International Conference on Communications

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“…The channel gains of the link between the satellite and the users are subjected to SR fading, where the probability density function (PDF) of the |h s | 2 is given by [29] as such that s ∈ {11, 22, f 1, f 2}, α s = 1 2 cs ( 2 cs ms 2 cs ms+Ωs ) ms , β s = 1 2 cs , and δ s = Ωs 2 cs (2 cs ms +Ωs) . 1 F 1 (.…”

Section: B Sr Fading Channels Statisticsmentioning

confidence: 99%

Outage Analysis of Coordinated NOMA Transmission for LEO Satellite Constellations

ElHalawany

Gamal

Elsayed

et al. 2022

IEEE Open J. Commun. Soc.

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This work investigates the performance of a downlink non-orthogonal multiple access (NOMA) based coordinated low-earth orbit (LEO) satellite system. Two LEO satellites are assumed to coordinate their transmissions to serve three users simultaneously using NOMA protocol, where only one user lies in the intersection of the footprints of the two satellites. We investigate the reliability of the proposed architecture, which is expressed in terms of the outage probability (OP). We derive closedform expressions of the users' OPs taking into considerations different realistic losses effects on the link budget including receiver antenna gain, satellite antenna gain, antennas pointing errors, shadowing, smallscale fading, and large-scale free space path loss. The channels between satellites and the three users are assumed to follow shadowed-Rician (SR) fading. The mathematical analysis is verified by the extensive representative Monto-Carlo simulations. Finally, we demonstrate the impact of the system parameters on the considered system as well as the superiority of the NOMA scheme over conventional OMA system.

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“…3) Channel Model Statistics. The downlink between each visible satellite k and its connected HAP can be modeled by a shadowed-Rician fading channel, whose probability density function (PDF) of |λ k | 2 is given by [32]…”

Section: B Introducing Noma To Fl-leomentioning

confidence: 99%

AsyncFLEO: Asynchronous Federated Learning for LEO Satellite Constellations with High-Altitude Platforms

Elmahallawy

Luo

2022

2022 IEEE International Conference on Big Data (Big Data)

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The advances in satellite technology developments have recently seen a large number of small satellites being launched into space on Low Earth orbit (LEO) to collect massive data such as Earth observational imagery. The traditional way which downloads such data to a ground station (GS) to train a machine learning (ML) model is not desirable due to the bandwidth limitation and intermittent connectivity between LEO satellites and the GS. Satellite edge computing (SEC), on the other hand, allows each satellite to train an ML model onboard and uploads only the model to the GS which appears to be a promising concept. This paper proposes FedLEO, a novel federated learning (FL) framework that realizes the concept of SEC and overcomes the limitation (slow convergence) of existing FL-based solutions. FedLEO (1) augments the conventional FL's star topology with "horizontal" intra-plane communication pathways in which model propagation among satellites takes place; (2) optimally schedules communication between "sink" satellites and the GS by exploiting the predictability of satellite orbiting patterns. We evaluate FedLEO extensively and benchmark it with the state of the art. Our results show that FedLEO drastically expedites FL convergence, without sacrificingin fact it considerably increases-the model accuracy.

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Physical Layer Security in Hybrid Satellite-Terrestrial Relay Networks

Cited by 5 publications

References 43 publications

Performance of Hybrid Satellite-UAV NOMA Systems

Performance of Hybrid Satellite-UAV NOMA Systems

Outage Analysis of Coordinated NOMA Transmission for LEO Satellite Constellations

AsyncFLEO: Asynchronous Federated Learning for LEO Satellite Constellations with High-Altitude Platforms

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