Optical networks: a practical perspective
Optical networks: a practical perspective
Intelligent Optimisation Techniques: Genetic Algorithms, Tabu Search, Simulated Annealing and Neural Networks
Computer Networks
A Study of Dynamic Routing and Wavelength Assignment with Imprecise Network State Information
ICPPW '02 Proceedings of the 2002 International Conference on Parallel Processing Workshops
Fundamentals of Computational Swarm Intelligence
Fundamentals of Computational Swarm Intelligence
Computer Networks: The International Journal of Computer and Telecommunications Networking
WDM optical communication networks: progress and challenges
IEEE Journal on Selected Areas in Communications
Cross-layer adaptive routing and wavelength assignment in all-optical networks
IEEE Journal on Selected Areas in Communications - Part Supplement
Photonic Network Communications
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In all-optical networks, signals are transmitted through optical physical layer with no regeneration. Therefore, noise accumulation along lightpath can severely impair optical signal-to-noise ratio. Impairment aware routing and wavelength assignment algorithms (IA-RWA) can take into account these effects, improving the network performance. In this paper we describe a fast and high performance adaptive weight function to be used as the metric for the routing algorithm in optical networks constrained by physical impairments. The input information for this function are link availability, route length and two adjustable parameters. These two parameters provide information about the network impairments. An offline simulation must be run to adjust them prior to the online network operation. The main advantage of this approach is the use of simple network parameters during the routing process instead of a complex optical noise based formulation, which renders it a better performance in terms of both, time to find a route and blocking probability. In our simulations we considered three physical layer effects: ASE noise generation, Optical Amplifier gain and ASE saturation and OXC crosstalk. We performed a performance comparison between this new metric and other metrics previously described in the literature.