A Novel Semi-flexible Grid Optical Path Network That Utilizes Aligned Frequency Slot Arrangement

Hirano, A.; Tanaka, Tomonari; Sato, Ken-ichi; Hasegawa, Hiroshi; Shen, Zhishu

doi:10.1049/cp.2013.1426

Cited by 6 publications

(7 citation statements)

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“…Here we have presented the main benefits of elastic modulation and flexgrid, both separately and together. There are other concepts being discussed, for example involving a fixed/flexgrid hybrid [33]. Flexgrid capability appears to provide roughly a 33% capacity benefit together with the important scope for carrying super-channels.…”

Section: Open Questionsmentioning

confidence: 99%

Core Networks in the Flexgrid Era

Lord

Wright

Mitra

2015

J. Lightwave Technol.

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Section: Open Questionsmentioning

confidence: 99%

Core Networks in the Flexgrid Era

Lord

Wright

Mitra

2015

J. Lightwave Technol.

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“…1. This semi-flexible grid technique is effective in reducing both spectrum fragmentation and blocking probability [1].…”

Section: System Description and Modeling Assumptionsmentioning

confidence: 99%

“…Elastic Optical Networks (EONs) enable uneven assignments of the fiber spectrum -logically divided to form multiple consecutive equal slices -to best match traffic bandwidth requirements between network nodes [1]. Consider for simplicity an EON offering only two types of circuit service.…”

Section: Introductionmentioning

confidence: 99%

“…The fragmentation problem in EON has been extensively studied [1], [4]- [6]. In these studies, a number of Routing and Spectrum Allocation (RSA) algorithms are proposed [1], [4], [5] with the aim of reducing the adverse effects originating from spectrum fragmentation.…”

Section: Introductionmentioning

confidence: 99%

“…In these studies, a number of Routing and Spectrum Allocation (RSA) algorithms are proposed [1], [4], [5] with the aim of reducing the adverse effects originating from spectrum fragmentation. A typical objective of the RSA algorithm is to compute the end-to-end path and the group of slices that must be assigned to each optical circuit in order to minimize the number of circuit requests that are blocked, i.e., circuits that cannot be provisioned in the EON due to the insufficient availability of slices in the fibers.…”

Section: Introductionmentioning

confidence: 99%

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An Analytical Model of Spectrum Fragmentation in a Two-Service Elastic Optical Link

Kim

Yan

Fumagalli

et al. 2015

2015 IEEE Global Communications Conference (GLOBECOM)

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Elastic Optical Networks (EONs) enable optical circuits to be assigned distinct numbers of spectrum slices. Individual circuits can then be assigned an optimal number of slices to best match their target transmission rates. A well-known drawback of EONs is spectrum fragmentation and its resulting uneven blocking probability, which circuit requests experience when the available spectrum slices in the fiber are insufficient or not contiguous. Capturing this spectrum fragmentation problem analytically is a challenging problem. Not surprisingly, most of the existing studies at this time mainly use simulationbased techniques to quantify blocking probability in EONs. In this paper, the authors present a Markov Chain (MC) model that attempts to characterize the fragmentation problem in a simplified scenario, i.e., only two types of circuit services are allowed over a single fiber link. Despite its limited scope, this initial analytical effort is able to accurately capture the nonmonotonic behavior of the blocking probability in EONs for the first time.

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