Experimental Demonstration of an Impairment Aware Network Planning and Operation Tool for Transparent/Translucent Optical Networks

Survivable routing and regenerator placement in optical networks

“…For a design problem, like placing regenerators, a more conservative approach suffices, where we consider a single impairment metric that represents the worst impairment among all the impairments on a link. Alternatively, the metric could reflect distance, which plays a key role in determining the quality of a signal, or a specific impairment metric like the Q-factor [1].…”

“…Impairment-aware network planning and operation is discussed in [17] and a corresponding tool has been proposed by Azodolmolky et al [1].…”

Experimental demonstration of a cognitive quality of transmission estimator for optical communication systems

“…Antonio Caballero (1) , Juan Carlos Aguado (2) , Robert Borkowski (1) , Silvia Saldaña (1) , Tamara Jiménez (2) , Ignacio de Miguel (2) , Valeria Arlunno (1) , Ramón J. Durán (2) , Darko Zibar (1) , Jesper B. Jensen (1) , Rubén M. Lorenzo (2) , Evaristo J. Abril (2) , Idelfonso Tafur Monroy Introduction Next generation optical networks will be of a highly heterogeneous nature, as they will support mixed bit-rates, mixed modulation formats and even a flexible grid for spectrum allocation. That arising scenario brings new challenges in terms of transmission robustness, optical monitoring and mechanisms for control and management.…”

“…That arising scenario brings new challenges in terms of transmission robustness, optical monitoring and mechanisms for control and management. One of those challenges is the need for new estimation techniques to predict the quality of transmission (QoT) of optical connections before being established in the network, thus supporting impairment-aware networking 1 . The use of cognition, and specifically the use of previous experiences, can help overcome the latter issue.…”

Physical Layer Impairments in the Optimization of the Next-Generation of All-Optical Networks

“…Grooming algorithms, routing and wavelength assignment (GRWA) work with the assumption that all wavelengths in the optical media have the same characteristics of transmission of bits -no bit error (Azodolmolky et al, 2011). However, the optical fiber presents some phenomena that impair the transmission quality of the light-trees.…”