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

doi:10.1002/ett.1444

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 journal › Article › peer-review

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 language	English
Pages (from-to)	563-566
Number of pages	4
Journal	European Transactions on Telecommunications
Volume	21
Issue number	6
Early online date	29 Sept 2010
DOIs	https://doi.org/10.1002/ett.1444
Publication status	Published - Oct 2010

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10.1002/ett.1444

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

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