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Uniform waveband assignment in optical mesh networks

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Abstract

The cost of an optical network in wavelength division multiplexing (WDM) networks can be reduced using optical reconfigurable optical add/drop multiplexers (ROADMs), which allow traffic to pass through without the need for an expensive optical-electro-optical (O-E-O) conversion. Waveband switching (WBS) is another technique to reduce the network cost by grouping consecutive wavelengths and switching them together using a single port per waveband. WBS has attracted the attention of researchers for its efficiency in reducing switching complexity and therefore cost in WDM optical networks. In this paper, we consider the problem of switching wavelengths as non-overlapping uniform wavebands, per link, for mesh networks using the minimum number of wavebands. Given a fixed band size b s , we give integer linear programming formulations and present a heuristic solution to minimize the number of ROADMs (number of wavebands) in mesh networks that support a given traffic pattern. We show that the number of ROADMs (or number of ports in band-switching cross-connects) can be reduced significantly in mesh networks with WBS compared to wavelength switching using either the ILP or the heuristic algorithm. We also examine the performance of our band assignment algorithms under dynamic traffic.

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Author notes

  1. Onur Turkcu

    Present address: Department of Computer Science and Engineering, University of California, Riverside, CA, 92521, USA

Authors and Affiliations

  1. Department of Electrical and Computer Engineering, The George Washington University, Washington, DC, 20052, USA

    Majid Alnaimi, Onur Turkcu & Suresh Subramaniam

Authors
  1. Majid Alnaimi
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  2. Onur Turkcu
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  3. Suresh Subramaniam
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Correspondence to Majid Alnaimi.

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Parts of this work were presented in [1].

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Alnaimi, M., Turkcu, O. & Subramaniam, S. Uniform waveband assignment in optical mesh networks. Photon Netw Commun 22, 266–275 (2011). https://doi.org/10.1007/s11107-011-0326-y

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  • DOI: https://doi.org/10.1007/s11107-011-0326-y

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