Impairement Aware Network Planning ; Planification du réseau tenant compte des déficiences

Optical networks are the backbone of global data communication, essential for meeting the ever-growing demand for high-speed, reliable networks. This thesis addresses two key challenges: the need for higher capacity and the integration of new optical functionalities. The relentless demand for capacity has pushed the limits of current infrastructure, and while solutions like additional fibers, extended spectrum, or new flex-rate transponders are possible, they come with significant capital expenditure. We propose network-wide heuristics that model linear and nonlinear impairments and suggest per-channel power allocations to maximize network-wide SNR, thus enhancing capacity. The second challenge involves integrating new optical functionalities, which requires consideration of both network-level and physical-layer interactions. Traditional SDN tools often overlook the physical layer, so we developed an optical network simulator that incorporates physical layer impairments into network planning. We demonstrate the integration of an example optical functionality Quantum Key Distribution (QKD), that enhances security through quantum mechanics principles. By optimizing wavelength placement to minimize Raman noise, we propose network-wide heuristics that improve the coexistence of QKD and classical signals in the same band. Addressing these challenges underscores the importance of impairment-aware network planning, forming the core of future optical network design to meet growing demands with enhanced efficiency, capacity, and security. ; Les réseaux optiques sont l’épine dorsale de la communication mondiale de données, essentiels pour répondre à la demande croissante de réseaux rapides et fiables. Cette thèse aborde deux défis principaux : le besoin de capacité accrue et l’intégration de nouvelles fonctionnalités optiques. La demande incessante de capacité a poussé les limites de l’infrastructure actuelle, et bien que des solutions telles que l’ajout de fibres, l’extension du spectre ou l’utilisation de transpondeurs ...