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On the management of wavelength converter allocation in WDM all-optical networks

Previous works have shown the wavelength conversion can considerably reduce the blocking probability in all-optical networks, but most of analytical models and algorithms are proposed under simplifying assumptions or restricted to specific cases. In this paper, motivated by an abstracting technique called blocking island (BI) paradigm, we propose wavelength placement algorithms both in static traffic case and dynamic traffic case. To make sure our algorithm is applicable in arbitrary topologies and any incoming traffic patterns, a simulation-based optimization approach is employed. In the simulation, we show the performance improvement obtained by full wavelength conversion can almost be achieved by using limited number of wavelength converters with careful placement.