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A scalable optical WDM multicast Beneš network with multi-channel wavelength converters

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Abstract

An optical wavelength division multiplexing (WDM) multicast network interconnects an input signal on a given wavelength to one or more output fibers, possibly on different wavelengths (via wavelength conversion), while maintaining the signal in the optical domain. A key challenge in the design of scalable multicast networks is to reduce conversion complexity without affecting the switching capability and signal quality. In this article, we propose a scalable WDM multicast Beneš interconnection network with minimized conversion complexity. The proposed network is based on the Copy-and-Route architecture, and it uses multi- channel WCs (MCWCs) for wavelength conversion. The conversion complexity of the proposed design is O(F log2 W) (where F is the number of fibers and W is the number of wavelengths per fiber), which is smaller than the O(FW) complexity of the optimal design based on conventional single-channel WCs (SCWCs). We prove that, for W >  64 and for any value of F, the conversion complexity of the new design is strictly less than that of the optimal SCWC-based design regardless of the total number of wavelengths simultaneously converted by each MCWCs. Analyzes of conversion complexity of the proposed design for large values of W confirm considerable savings compared to the optimal SCWC-based design. For instance, for W = 256 and an for an arbitrary value of F, a practical implementation of the proposed design achieves 87% reduction in conversion complexity as compared to the optimal SCWC-based design.

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Authors and Affiliations

  1. Department of Information Technology, Faculty of Computes and Information, Cairo University, Giza, Egypt

    Haitham S. Hamza

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  1. Haitham S. Hamza
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Correspondence to Haitham S. Hamza.

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Hamza, H.S. A scalable optical WDM multicast Beneš network with multi-channel wavelength converters. Photon Netw Commun 21, 201–213 (2011). https://doi.org/10.1007/s11107-010-0293-8

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  • DOI: https://doi.org/10.1007/s11107-010-0293-8

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