Fragmentation Metrics in Spectrally-Spatially Flexible Optical Networks - Optical Network Design and Modeling
Conference Papers Year : 2020

Fragmentation Metrics in Spectrally-Spatially Flexible Optical Networks

Abstract

Spectrally-spatially flexible optical networks (SS-FONs) are proposed as a solution for future traffic requirements in optical backbone networks. As SS-FONs operate within flex-grid, the provisioning of lightpaths spanning multiple frequency slots results in spectrum fragmentation, especially in presence of dynamic traffic. Fragmentation, in turn, may lead to blocking of dynamic requests due to the lack of sufficiently-large free spectral windows. In this paper, to reach a better understanding of fragmentation in SS-FON, we extend several metrics used in (single-core) elastic optical networks to measure the fragmentation in SS-FONs. Next, we apply these metrics to a dynamic-routing algorithm with the goal of minimizing bandwidth blocking. Finally, we analyze the impact of spatial continuity constraint (SCC) on the network fragmentation. Simulations run on two representative network topologies show that the root mean square factor metric yields the best performance in terms of blocking when compared to other analyzed metrics.
Fichier principal
Vignette du fichier
484327_1_En_21_Chapter.pdf (1.28 Mo) Télécharger le fichier
Origin Files produced by the author(s)

Dates and versions

hal-03200685 , version 1 (16-04-2021)

Licence

Identifiers

Cite

Piotr Lechowicz, Massimo Tornatore, Adam Włodarczyk, Krzysztof Walkowiak. Fragmentation Metrics in Spectrally-Spatially Flexible Optical Networks. 23th International IFIP Conference on Optical Network Design and Modeling (ONDM), May 2019, Athens, Greece. pp.235-247, ⟨10.1007/978-3-030-38085-4_21⟩. ⟨hal-03200685⟩
51 View
27 Download

Altmetric

Share

More