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Rearrangeable and Repackable S-W-S Elastic Optical Networks for Connections with Limited Bandwidths

Department of Applied Math, National University of Tainan, Tainan City 70005, Taiwan
Appl. Sci. 2020, 10(4), 1251; https://doi.org/10.3390/app10041251
Received: 30 December 2019 / Revised: 7 February 2020 / Accepted: 9 February 2020 / Published: 13 February 2020
(This article belongs to the Special Issue Photonic Switching)
Elastic optical networks flexibly allocate bandwidth to a connection for improving utilization efficiency. The paper considers an optical node architecture that is similar to a three-stage Clos network for elastic optical networks. The architecture, which employs space switching in the first and the third stages and wavelength switching in the second stage, is called an S-W-S switching fabric. In this paper, we propose a graph-theoretic approach and different routing algorithms to derive the sufficient conditions under which an S-W-S switching fabric will be rearrangeable nonblocking and repackable nonblocking. The proposed rearrangeable and repackable nonblocking S-W-S switching fabrics for connections with limited bandwidths consume around half the number of middle wavelength switches compared to strictly nonblocking S-W-S switching fabrics. View Full-Text
Keywords: elastic optical network; rearrangeable nonblocking; space-wavelength-space switching fabric; repackable nonblocking elastic optical network; rearrangeable nonblocking; space-wavelength-space switching fabric; repackable nonblocking
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Lin, B.-C. Rearrangeable and Repackable S-W-S Elastic Optical Networks for Connections with Limited Bandwidths. Appl. Sci. 2020, 10, 1251.

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