Portrait of Yassine Afif is unavailable

Yassine Afif

Master's Research - Polytechnique Montréal
Supervisor
Antoine Lesage-Landry
Co-supervisor
Antoine Lesage-Landry
Research Topics
AGI (Artificial General Intelligence)
Network
Optimization

Publications

Joint Satellite Power Consumption and Handover Optimization for LEO Constellations
Yassine Afif
Mohammed Almekhlafi
Antoine Lesage-Landry
Gunes Karabulut Kurt
In satellite constellation-based communication systems, continuous user coverage requires frequent handoffs due to the dynamic topology indu… (see more)ced by the Low Earth Orbit (LEO) satellites. Each handoff between a satellite and ground users introduces additional signaling and power consumption, which can become a significant burden as the size of the constellation continues to increase. This work focuses on the optimization of the total transmission rate in a LEO-to-user system, by jointly considering the total transmitted power, user-satellite associations, and power consumption, the latter being handled through a penalty on handoff events. We consider a system where LEO satellites serve users located in remote areas with no terrestrial connectivity, and formulate the power allocation problem as a mixed-integer concave linear program (MICP) subject to power and association constraints. Our approach can be solved with off-the-shelf solvers and is benchmarked against a naive baseline where users associate to their closest visible satellite. Extensive Monte Carlo simulations demonstrate the effectiveness of the proposed method in controlling the handoff frequency while maintaining high user throughput. These performance gains highlight the effectiveness of our handover-aware optimization strategy, which ensures that user rates improve significantly, by about 40%, without incurring a disproportionate rise in the handoff frequency.
2025-10-13
International Conference on Wireless for Space and Extreme Environments (published)
doi.org
arxiv.org