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We present a generic step-by-step methodology for evaluating the total cost of migrating from a capacity-exhausted WDM network to different upgraded alternatives. The presented methodology is the first effort to provide a generic evaluation framework (allowing the evaluation of scenarios with different traffic growth rates, optical technologies, network architectures, and resource allocation algorithms)...
The contribution of the energy consumption on the operational costs of the WDM layer of two network architectures is evaluated. Results show that energy consumption does not determine the operational expenditures of the optical layer.
A dynamic lightpath allocation algorithm that considers the impact of Raman amplification on the quality of the signal is proposed. To do so, an exhaustive theoretical model that includes fiber attenuation, Rayleigh scattering, stimulated Raman scattering (gain and depletion of channels and pumps) and spontaneous Stokes and anti-Stokes scattering caused by Distributed Fiber Raman Amplifiers (DFRAs)...
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