Benefits of Elastic Spectrum Allocation in Optical Networks with Dynamic Traffic (Benefits of Elastic Spectrum Allocation in Optical Networks with Dynamic Traffic)

Stefano Bregni (bregni@elet.polimi.it)1, Michael Recalcati (none@polimi.it)1, Francesco Musumeci (musumeci@elet.polimi.it)1, Massimo Tornatore (tornator@elet.polimi.it)1, Achille Pattavina (pattavin@elet.polimi.it)1


1Politecnico di Milano

This paper appears in: Revista IEEE América Latina

Publication Date: Nov. 2015
Volume: 13,   Issue: 11 
ISSN: 1548-0992


Abstract:
Traditional optical core networks based on Wavelength Division Multiplexing (WDM) provide optical channels (wavelengths) rigidly allocated over the optical spectrum and separated by 50 or 100 GHz. The novel concept of Elastic Optical Network (EON) can help to improve network flexibility by allo-cating multiple sub-channels to incoming connection requests with finer bandwidth granularity (hence the term elastic) over a flexible spectrum grid. In this paper, we propose an algorithm for connection resource provisioning in EONs. We compare the per-formance of flexible-grid EONs to that of fixed-grid WDM net-works under dynamic traffic, with and without grooming capa-bility, in terms of blocking probability and network resource (i.e. overall spectrum) occupation, thus showing quantitatively the advantage of EON compared to grooming-based WDM networks.

Index Terms:
optical networks   


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