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On service provisioning using light-trails in WDM optical networks with waveband switching

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Abstract

As the number of wavelengths in a single optical fiber increases, so does the number of ports needed for wavelength switching in optical cross-connects (OXCs), which may significantly increase the cost and difficulty associated with controlling large OXCs. Waveband switching (WBS) treats several wavelengths as a bundle that is switched through a single port if they share the same switch route, so that the number of ports needed can be reduced. On the other hand, light-trails in wavelength division multiplexing (WDM) optical networks allow intermediate nodes on established optical paths to access the data paths whereas light-paths only allow two end nodes to access the data paths. Therefore, light-trails offer significantly better flexibility for service provisioning and traffic grooming. In this article, we study service provisioning using light-trails in WDM optical networks with the WBS capability under a static traffic model. For comparison, integer linear programs are formulated for establishing light-trails with and without WBS. Numerical studies show that in certain cases, service provisioning with WBS in light-trail networks can reduce the number of ports needed while providing a more flexible sub-wavelength service provisioning capability. However, contrary to intuition, in most cases applying the WBS technique requires more ports in OXCs in light-trail networks. This study provides insights into the network design problem that applies the WBS technology to light-trail based optical networks.

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Authors and Affiliations

  1. Southwestern University of Finance and Economics, Chengdu, China

    Xubin Luo

  2. Wright State University, Dayton, OH, USA

    Bin Wang

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  1. Xubin Luo
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  2. Bin Wang
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Correspondence to Bin Wang.

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Luo, X., Wang, B. On service provisioning using light-trails in WDM optical networks with waveband switching. Photon Netw Commun 21, 97–105 (2011). https://doi.org/10.1007/s11107-010-0284-9

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  • DOI: https://doi.org/10.1007/s11107-010-0284-9

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