Cross-Layer Control of Semitransparent Optical Networks Under Physical Parameter Uncertainty

This chapter deals with the routing and wavelength assignment and regenerator placement (RWARP) in semitransparent optical networks. In particular, it focuses on semitransparent network dimensioning and control, exploiting a cross-layer approach. The chapter describes the physical model adopted and the deterministic RWARP algorithm proposed for the dimensioning phase, computing the necessary resources of the network. Moreover the deterministic algorithm and a new RWA algorithm based on prediction concepts are proposed to analyze the network response in different conditions, in terms of parameter values of the systems and offered traffic. Results of this analysis show that the deterministic approach performs better in case of perfect knowledge of the impairment parameters, while the predictive one outperforms the former in case of imperfect knowledge, which is usually the case in practical settings.

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