A Novel Offline Physical Layer Impairments Aware RWA Algorithm With Dedicated Path Protection Consideration

• Published in: Journal of lightwave technology 2010-10, Vol.28 (20), p.3029-3040
• Main Authors: Azodolmolky, Siamak, Klinkowski, Mirosław, Pointurier, Yvan, Angelou, Marianna, Careglio, Davide, Solé-Pareta, Josep, Tomkos, Ioannis
• Format: Article
• Language: English
• Subjects: Applied sciences; Control de qualitat; Dedicated path protection; Enginyeria de la telecomunicació; Exact sciences and technology; Heuristic algorithms; Impairments aware RWA; Measurement; Optical communications; Optical fiber communications; Optical telecommunications; Optimization; Physical layer; Physical layer impairments; Q factor; Quality control; Routing and wavelength assignment; Systems, networks and services of telecommunications; Telecommunications; Telecommunications and information theory; Telecomunicació òptica; Transmission and modulation (techniques and equipments); Wavelength assignment; Xarxes de telecomunicació òptiques; Àrees temàtiques de la UPC
• ISSN: 0733-8724; 1558-2213
• DOI: 10.1109/JLT.2010.2072905

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.