Wide-sense nonblocking elastic optical switch

Kabacinski, W.; Michalski, Marek; Abdulsahib, Mustafa

doi:10.1016/j.osn.2016.09.003

Cited by 19 publications

(12 citation statements)

References 20 publications

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“…Therefore, the new SNB conditions for WSW1 and WSW2 switching fabrics have been derived in [17] and [10], respectively. In [18] and [19], the authors consider different routing strategies based on the functional decomposition of center-stage switches, or FSUs, and derived appropriate WSNB conditions. Two approaches have been proposed to route simultaneous connections in WSW1 and WSW2 switching fabrics, one is based on graph coloring [20], and the other one -only for WSW1 switching fabrics -on matrix decomposition [21]- [23].…”

Section: B Related Workmentioning

confidence: 99%

Rearrangeability of Wavelength-Space-Wavelength Switching Fabric Architecture for Elastic Optical Switches

2019

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In this paper, we consider the necessary and sufficient rearrangeability conditions for the wavelength-space-wavelength switching fabric, called the WSW2 switching fabric, for elastic optical network nodes. We derive and prove the lower bound of the necessary conditions for such switching fabrics to be rearrangeable. We also show the upper bound of the sufficient conditions for the rearrangeability of the switching fabric with two input and two output switches. For simultaneous connection routing, we propose a routing algorithm that always ends with success in switching fabrics, which fulfill the sufficient conditions. Finally, we extend the proposed algorithm to the switching fabric with r input and r output switches, and we derive the conditions under which this routing algorithm always ends in success. The required number of center-stage switches is significantly lower than that in the strict-sense nonblocking switching fabrics. To our knowledge, the proposed routing algorithm is the first one which ends with success for any connection set, within the provided sufficient conditions. INDEX TERMS Elastic optical network, optical switch, rearrangeable switching network, simultaneous connection routing algorithm.

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Section: B Related Workmentioning

confidence: 99%

Rearrangeability of Wavelength-Space-Wavelength Switching Fabric Architecture for Elastic Optical Switches

2019

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“…A demonstration of a 16 × 16 W-S-W optical switching test bed for EONs has been presented in [6]. This architecture with different types of nonblockingness was considered in [8][9][10][11][12]. Another three-stage switching fabric for EONs is the space-wavelength-space (S-W-S) architecture, which has only spectrum converters in the middle stage [7].…”

Section: Introductionmentioning

confidence: 99%

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

Lin¹

2020

Applied Sciences

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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.

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“…Various optical switches have been proposed to set up these flexible connections [4]- [9]. Zhang et al [4] compared four architectures with spectrum converters arranged in the ''shared-per-link'' and ''shared-per-node'' models.…”

Section: Introductionmentioning

confidence: 99%

Necessary and Sufficient Conditions for the Rearrangeability of WSW1 Switching Fabrics

2019

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This paper considers the three-stage switching fabrics of the wavelength-space-wavelength architecture, called the WSW1 switching fabrics, for elastic optical nodes. Seven control algorithms for simultaneous connection routing are described. One algorithm is designed for the WSW1 switching fabric with two inputs and two outputs, four algorithms for the WSW1 switching fabric with three inputs and outputs, and two algorithms for nodes with a capacity greater than 3. We establish the necessary conditions for rearrangeability and prove sufficient rearrangeable conditions for the proposed algorithms. In cases where the switching fabric capacity is a multiple of 3, the sufficient conditions obtained for the proposed algorithms are the best known and close to the necessary conditions. INDEX TERMS Elastic optical networks, optical switches, rearrangeable switching fabrics, control algorithms.

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Wide-sense nonblocking elastic optical switch

Cited by 19 publications

References 20 publications

Rearrangeability of Wavelength-Space-Wavelength Switching Fabric Architecture for Elastic Optical Switches

Rearrangeability of Wavelength-Space-Wavelength Switching Fabric Architecture for Elastic Optical Switches

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

Necessary and Sufficient Conditions for the Rearrangeability of WSW1 Switching Fabrics

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