We investigate cost-efficient upgrade strategies for capacity
enhancement in optical backbone networks enabled by C+L-band optical
line systems. A multi-period strategy for upgrading network links from
the C band to the C+L band is proposed, ensuring physical-layer
awareness, cost effectiveness, and less than 0.1% blocking. Results
indicate that the performance of an upgrade strategy depends on
efficient selection of the sequence of links to be upgraded and on the
time instant to upgrade, which are either topology or traffic
dependent. Given a network topology, a set of traffic demands, and
growth projections, our illustrative numerical results show that a
well-devised upgrade strategy can achieve superior cost efficiency
during the capacity upgrade to C+L enhancement.
Soheil Hosseini, Ignacio de Miguel, Noemí Merayo, Juan Carlos Aguado, Óscar González de Dios, and Ramón J. Durán Barroso J. Opt. Commun. Netw. 15(11) F22-F35 (2023)
Bruno Correia, Rasoul Sadeghi, Emanuele Virgillito, Antonio Napoli, Nelson Costa, João Pedro, and Vittorio Curri J. Opt. Commun. Netw. 13(7) 147-157 (2021)
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