Physical layer impairments accumulate as light propagates through a lightpath in the transparent optical networks. Therefore, it is possible to provision a lightpath, while its quality of transmission (QoT) does not meet the required threshold. Considering
the physical layer impairments in the network planning phase gives rise to a set of offline Impairments Aware Routing and
Wavelength Assignment (IA-RWA) algorithms. There are very few offline IA-RWA algorithms that consider dedicated path protection demands. In this work we propose a novel offline IA-RWA algorithm, called Rahyab and perform a comparative performance evaluation study, which considers two enhanced algorithms from the literature. Simulation results indicates that demand pre-processing,
diverse routing, and adaptive wavelength assignment are the main reasons of lower blocking rate of Rahyab algorithm compared
to the selected algorithms.
CitationAzodolmolky, S. [et al.]. A novel offline physical layer impairments aware RWA algorithm with dedicated path protection consideration. "Journal of lightwave technology", 15 Octubre 2010, vol. 28, núm. 20, p. 3029-3040.
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