This paper investigates the secrecy performance of a cooperative non-orthogonal multiple access (NOMA) network under practical impairments. In the considered system, the source employs orthogonal space-time block coding (OSTBC) transmission, legitimate users adopt receive antenna selection (RAS), and the eavesdropper u...
We evaluate diverse models for user traffic demand forecasting in Low Earth Orbit (LEO) satellite networks with Beam Hopping (BH), questioning whether predictive accuracy is the right objective for this task. To capture the complex nature of the user traffic demand, we employ a second-order self-similar traffic model,...
Yekta Demirci, Guillaume Mantelet, Stéphane Martel et al.· IEEE Journal of Radio Freque...· 0 citations
Due to their high orbital velocity, low Earth orbit (LEO) satellites traverse overhead in minutes, forcing ground users to frequently switch their serving beam or satellite. Such handover disrupts ongoing transmissions, introduces signalling overheads and synchronization delays across the constellation, and reduces the...
Yassine Afif, M. Almekhlafi, Antoine Lesage-Landry et al.· IEEE Journal of Radio Freque...· 0 citations
With the gaining prominence of aerial mobility applications, their success depends on the seamless integration of terrestrial and non-terrestrial network connectivity. However, providing reliable connectivity from terrestrial telecommunication networks remains challenging due to multi-cell interference from base statio...
G. Reddy, Kürşat Tekbıyık, Bryton J. Petersen et al.· 0 citations
The proposed approach consistently maintains non-positive empirical SLA gaps and achieves up to $30\% higher resource utilization than a price-optimization baseline without adaptive reserve control.
Manobendu Sarker, Günes Karabulut-Kurt, W. Jaafar· arXiv.org· 0 citations
A hybrid LEO-terrestrial architecture that integrates Software-Defined Networking ground station clusters with repeater-assisted reception and a structured fallback mechanism is proposed and results highlight the effectiveness of the proposed framework in enabling adaptive and delay-efficient control in next-generation...
Wafa Hasanain, Pablo G. Madoery, H. Yanikomeroglu et al.· IEEE Open Journal of the Com...· 0 citations
It is demonstrated that when designing user demand forecasting solutions for practical LEO deployments, prioritizing system scalability may be more valuable than chasing minor accuracy enhancements, suggesting that when designing system scalability solutions, prioritizing system scalability may be more valuable than ch...
Yekta Demirci, Guillaume Mantelet, Stéphane Martel et al.· 0 citations
Simulation results reveal that both setup penalties and controller activation thresholds are critical determinants of system behavior across both optimization-based and heuristic schemes, highlighting the necessity of jointly optimizing reassignment policies and controller activation strategies to support robust, low-l...
Wafa Hasanain, Pablo G. Madoery, Halim Yanikomeroglu et al.· IEEE Open Journal of the Com...· 0 citations
The proposed multi-agent reinforcement learning policy attains slightly higher throughput with fewer handovers by offloading a fraction of the users to the MEO and GEO layers, an emergent multi-orbit behavior that drives its favorable throughput and handover trade-off.
Yassine Afif, Ashutosh Balakrishnan, Philippe Martins et al.· 0 citations
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