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Simultaneous Connections Routing in Wavelength–Space–Wavelength Elastic Optical Switches

In this paper, we investigate the three-stage, wavelength–space–wavelength switching fabric architecture for nodes in elastic optical networks. In general, this switching fabric has r input and output switches with wavelength-converting capabilities and one center-stage space switch that does not ch...

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Autores principales: Abuelela, Enass, Żal, Mariusz, Kabaciński, Wojciech
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10098971/
https://www.ncbi.nlm.nih.gov/pubmed/37050675
http://dx.doi.org/10.3390/s23073615
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author Abuelela, Enass
Żal, Mariusz
Kabaciński, Wojciech
author_facet Abuelela, Enass
Żal, Mariusz
Kabaciński, Wojciech
author_sort Abuelela, Enass
collection PubMed
description In this paper, we investigate the three-stage, wavelength–space–wavelength switching fabric architecture for nodes in elastic optical networks. In general, this switching fabric has r input and output switches with wavelength-converting capabilities and one center-stage space switch that does not change the spectrum used by a connection. This architecture is most commonly denoted by the WSW1 (r, n, k) switching network. We focus on this switching fabric serving simultaneous connection routing. Such routing takes place mostly in synchronous packet networks, where packets for switching arrive at the inputs of a switching network at the same time. Until now, only switching fabrics with up to three inputs and outputs have been extensively investigated. Routing in switching fabrics of greater capacity is estimated based on routing in switches with two or three inputs and outputs. We now improve the results for the switching fabrics with four inputs and outputs and use these results to estimate routing in the switching fabric with an arbitrary number of inputs and outputs. We propose six routing algorithms based on matrix decomposition for simultaneous connection routing. For the proposed routing algorithms, we derive criteria under which they always succeed. The proposed routing algorithms allow the construction of nonblocking switching fabrics with a lower number of wavelength converters and the reduction of the overall switching fabric cost.
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spelling pubmed-100989712023-04-14 Simultaneous Connections Routing in Wavelength–Space–Wavelength Elastic Optical Switches Abuelela, Enass Żal, Mariusz Kabaciński, Wojciech Sensors (Basel) Article In this paper, we investigate the three-stage, wavelength–space–wavelength switching fabric architecture for nodes in elastic optical networks. In general, this switching fabric has r input and output switches with wavelength-converting capabilities and one center-stage space switch that does not change the spectrum used by a connection. This architecture is most commonly denoted by the WSW1 (r, n, k) switching network. We focus on this switching fabric serving simultaneous connection routing. Such routing takes place mostly in synchronous packet networks, where packets for switching arrive at the inputs of a switching network at the same time. Until now, only switching fabrics with up to three inputs and outputs have been extensively investigated. Routing in switching fabrics of greater capacity is estimated based on routing in switches with two or three inputs and outputs. We now improve the results for the switching fabrics with four inputs and outputs and use these results to estimate routing in the switching fabric with an arbitrary number of inputs and outputs. We propose six routing algorithms based on matrix decomposition for simultaneous connection routing. For the proposed routing algorithms, we derive criteria under which they always succeed. The proposed routing algorithms allow the construction of nonblocking switching fabrics with a lower number of wavelength converters and the reduction of the overall switching fabric cost. MDPI 2023-03-30 /pmc/articles/PMC10098971/ /pubmed/37050675 http://dx.doi.org/10.3390/s23073615 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Abuelela, Enass
Żal, Mariusz
Kabaciński, Wojciech
Simultaneous Connections Routing in Wavelength–Space–Wavelength Elastic Optical Switches
title Simultaneous Connections Routing in Wavelength–Space–Wavelength Elastic Optical Switches
title_full Simultaneous Connections Routing in Wavelength–Space–Wavelength Elastic Optical Switches
title_fullStr Simultaneous Connections Routing in Wavelength–Space–Wavelength Elastic Optical Switches
title_full_unstemmed Simultaneous Connections Routing in Wavelength–Space–Wavelength Elastic Optical Switches
title_short Simultaneous Connections Routing in Wavelength–Space–Wavelength Elastic Optical Switches
title_sort simultaneous connections routing in wavelength–space–wavelength elastic optical switches
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10098971/
https://www.ncbi.nlm.nih.gov/pubmed/37050675
http://dx.doi.org/10.3390/s23073615
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