Cost-effective upgrade of WDM all-optical networks using overlay fibres and hop reduction links

Farsheed Farjady, Kyeong Soo (Joseph) Kim, Nayla El Dahdah, Nick J. Doran

Research output: Contribution to journalArticle

Abstract

Fibre overlay is a cost-effective technique to alleviate wavelength blocking in some links of a wavelength-routed optical network by increasing the number of wavelengths in those links. In this letter, we investigate the effects of overlaying fibre in an all-optical network (AON) based on GÉANT2 topology. The constraint-based routing and wavelength assignment (CB-RWA) algorithm locates where cost-efficient upgrades should be implemented. Through numerical examples, we demonstrate that the network capacity improves by 25 per cent by overlaying fibre on 10 per cent of the links, and by 12 per cent by providing hop reduction links comprising 2 per cent of the links. For the upgraded network, we also show the impact of dynamic traffic allocation on the blocking probability.
Original languageEnglish
Pages (from-to)563-566
Number of pages4
JournalEuropean Transactions on Telecommunications
Volume21
Issue number6
Early online date29 Sep 2010
DOIs
Publication statusPublished - Oct 2010

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