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Cost-effective upgrade of WDM all-optical networks using overlay fibres and hop reduction links
European Transactions on Telecommunications, Volume: 21, Issue: 6, Pages: 563 - 566
Swansea University Authors: Nicholas Doran, Joseph Kim
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DOI (Published version): 10.1002/ett.1444
Abstract
Fiber 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 fiber in an all-optical network (AON) based on GÉANT2 topo...
| Published in: | European Transactions on Telecommunications |
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| Published: |
Wiley
2010
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa5991 |
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| Abstract: |
Fiber 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 fiber 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% by overlaying fiber on 10% of the links, and by 12% by providing hop reduction links comprising 2% of the links. For the upgraded network, we also show the impact of dynamic traffic allocation on the blocking probability. |
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| Item Description: |
In the future all-optical network (AON), where optical wavelengths are directly routed in optical domain and therefore can propagate from sources to destinations over long distances and in high bit rates without optical-to-electronic conversion, wavelength blocking is a major performance issue. Fibre overlay is a cost-effective technique to alleviate the wavelength blocking in some links of a network by increasing the number of wavelengths in those specific links. In this letter, we investigated the effects of overlaying fibre in the 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 demonstrated 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 shown the impact of dynamic traffic allocation on the blocking probability.* Impact Factor: 0.448 |
| College: |
Faculty of Science and Engineering |
| Issue: |
6 |
| Start Page: |
563 |
| End Page: |
566 |