All-optical networks with sparse wavelength conversion
IEEE/ACM Transactions on Networking (TON)
On optiml converter placement in wavelength-routed networks
IEEE/ACM Transactions on Networking (TON)
Limited-range wavelength translation in all-optical networks
INFOCOM'96 Proceedings of the Fifteenth annual joint conference of the IEEE computer and communications societies conference on The conference on computer communications - Volume 3
Computing approximate blocking probabilities for a class of all-optical networks
IEEE Journal on Selected Areas in Communications
Benefits of wavelength translation in all-optical clear-channel networks
IEEE Journal on Selected Areas in Communications
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Wavelength conversion has been shown as one of the key techniques to improve blocking performance in a wavelength-routed all-optical WDM network. Given that wavelength converters nowadays remain very expensive, how to make effective use of a limited number of wavelength converters becomes an important issue. In this paper, we present and analyze the Sparse-Partial Wavelength Conversion (SPWC) network architecture, which has the inherent flexibility that can facilitate network carriers to upgrade the legacy optical backbone to support wavelength conversion. We explore the efficiency of partial wavelength conversion and demonstrate that SPWC architecture can significantly reduce the number of wavelength converters, yet achieve excellent blocking performance with a proper wavelength converter placement scheme. We also propose a wavelength assignment scheme called Minimum Converter Allocation (MCA), which can further improve the utilization of the wavelength converters. Simulation results indicate that, with the proposed MCA wavelength assignment algorithm, the performance of a wavelength-routed WDM network with only 1%-5% of wavelength conversion capability is very close to that with Full-Complete Wavelength Conversion capability.