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Title:
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EVALUATION OF HEURISTICS FOR WAVELENGTH CONVERTER PLACEMENT IN OPTICAL NETWORKS |
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Author(s):
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Anderson Costa, Michael Barros, Reinaldo Gomes |
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ISBN:
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978-989-8533-06-7 |
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Editors:
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Hans Weghorn, Leonardo Azevedo and Pedro Isaías |
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Year:
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2011 |
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Edition:
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Single |
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Keywords:
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Wavelength conversion, optical networks, WDM, converter placement. |
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Type:
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Full Paper |
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First Page:
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217 |
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Last Page:
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224 |
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Language:
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English |
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Cover:
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Full Contents:
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click to dowload 
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Paper Abstract:
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Wavelength conversion has been shown as one of the key techniques to improve blocking performance in a wavelength-switched all-optical network. Lightpath establishment is expected to be an on demand service. Hence, path setup must take into account existing paths, wavelengths, and other resources available at the moment. With the increased use of the network, these resources become scarce and may result in the blocking of new connection. The blocking probability is the principal metric utilized for evaluation in this work. More specifically, the objective is to analyze the impact of using wavelength converters, responsible for converting between wavelengths, on path availability and blocking probability. Wavelength converters are high cost equipments that must be used with care. This work examines strategies for optimal positioning of wavelength converters in an optical WDM network. New heuristics are proposed and compared with existing ones. We show that use of sequential heuristic, where converters are iteratively positioned, outperforms existing heuristics while using a reduced number of wavelength converters. |
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