2161-3915/asset/olbannerleft.gif?v=1&s=8d89352e0b7d0760bbb22585efd9aa03a83c921b)
2161-3915/asset/olbannerright.gif?v=1&s=90ec6338ccf930d6bdf79fe73e278be98a624950)
Optical Communications: Letter
Cost-effective upgrade of WDM all-optical networks using overlay fibres and hop reduction links
Article first published online: 29 SEP 2010
DOI: 10.1002/ett.1444
Copyright © 2010 John Wiley & Sons, Ltd.
Additional Information
How to Cite
Farjady, F., Kim, K. S., Dahdah, N. E. and Doran, N. J. (2010), Cost-effective upgrade of WDM all-optical networks using overlay fibres and hop reduction links. European Transactions on Telecommunications, 21: 563–566. doi: 10.1002/ett.1444
Publication History
- Issue published online: 29 SEP 2010
- Article first published online: 29 SEP 2010
- Manuscript Accepted: 8 JUN 2010
- Manuscript Revised: 31 MAY 2010
- Manuscript Received: 29 OCT 2009
Funded by
- EPSRC HIPNet. Grant Number: EP/E001696/2
- European ERDF
- Abstract
- References
- Cited By
Graphical Abstract
Fiber overlay is a cost-effective technique for alleviating wavelength blocking in some links of a wavelength-routed optical network by increasing the number of wavelengths in those links. Through numerical examples of an all-optical network (AON) based on GÉANT2 topology, we demonstrate that network capacity improves by 25% by overlaying fiber on 10% of the links, and by 12% by providing hop reduction links comprising 2% of the links. We also show the impact of dynamic traffic allocation on blocking probability.
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. Copyright © 2010 John Wiley & Sons, Ltd.