Routing Algorithms in WDM Networks under Mixed Static and Dynamic Lambda-Traffic |
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Authors: | Guido Maier Achille Pattavina Luigi Barbato Francesca Cecini Mario Martinelli |
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Affiliation: | (1) CoreCom, Via Colombo, 81–20133 Milan, Italy;(2) Department of Electronics and Information (DEI), Politecnico di Milano, Piazza Leonardo da Vinci, 32–20133 Milan, Italy;(3) Fastweb S.p.A., Via Bernina, 6–20158 Milan, Italy;(4) H3G S.p.A., Via Leonardo da Vinci, 1, 20090 Trezzano sul Naviglio (Mi), Italy w;(5) CoreCom, Via Colombo, 81–20131 Milan, Italy;(6) DEI, Politecnico di Milano, Pizza, Leonardo da Vinci, 32–20133 Milan, Italy |
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Abstract: | Dynamic traffic is becoming important in WDM networks. In the transition towards full dynamic traffic, WDM networks optimized for a specific set of static connections will most likely also be used to support on-demand lightpath provisioning. Our paper investigates the issue of routing of dynamic connections in WDM networks which are also loaded with high-priority protected static connections. By discrete-event simulation we compare various routing strategies in terms of blocking probability and we propose a new heuristic algorithm based on an occupancy cost function which takes several possible causes of blocking into account. The behavior of this algorithm is tested in well-known case-study mesh networks, with and without wavelength conversion. Moreover, Poissonian and non-Poissonian dynamic traffics are considered. |
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Keywords: | wavelength division multiplexing dynamic traffic routing algorithms |
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