Linear dynamic adaptation of the BW granularity allocation for elastic optical OFDM networks

Al-Tarawneh, Luae; Taebi, Sareh

doi:10.1109/spects.2015.7285282

Cited by 7 publications

(7 citation statements)

References 6 publications

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“…In order to reduce the unlimited choices of NDAg(i) and LDAɡ(i), we constrained the range of ɡ into five integer values which are {1,2,3,4,5}, as indicated in refs. [14,20,21]. In Equations 2 and 3, stands for the fragmentation ratio over the optical path P i .…”

Section: Proposed Mechanism Dynamic Bw Granularity Adaptation Mechanismsmentioning

confidence: 99%

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Minimizing Blocking Probability in Elastic Optical Networks by Varying the Bandwidth Granularity Based on Optical Path Fragmentation

Al-Tarawneh¹,

Taebi²

2017

J Laser Opt Photonics

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Elastic optical networks (EONs) based on orthogonal frequency-division multiplexing (OFDM) are considered a promising solution for the next optical network's generation. It basically makes it possible to choose an adequate portion of the available spectrum to satisfy the requested capacity. In this paper, we consider the impact of spectrum fragmentation along the optical single/multipath routing transmission on the efficiency of the EONs. This involves reducing the fragmentation effects by dynamically updating and controlling the minimum bandwidth allocation granularity (g).We adopt linear and nonlinear dynamic mechanisms, which are denoted as LDAɡ and NLDAɡ, respectively, to choose proper band width granularities that are proportional to the optical link/path bandwidth fragmentation status. In order to avoid neither splitting the capacity request over many routing paths, which would increase the management complexity, nor encouraging single path transmission, the proposed schemes aim to choose a proper bandwidth allocation granularity (g) of a predefined set of suggested values. Simulation results show that varying the bandwidth granularity based on the optical path fragmentation status can offer improved performance over fixed granularity with respect to the bandwidth blocking probability, the number of path splitting, the throughput, and differential delay constraint issue in terms of: the network bandwidth utilization and multipath distribution.

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Section: Proposed Mechanism Dynamic Bw Granularity Adaptation Mechanismsmentioning

confidence: 99%

“…These topologies have been employed as a test bed by other works, such as in refs. [14,20,21]. NSFNET has 14 stations indexed from 1 to 14 with 22 links, and the US backbone network has 24 stations, from 1 to 24 with 43 links.…”

Section: Network Topologies and Simulation Parameters Of The Test Netmentioning

confidence: 99%

Minimizing Blocking Probability in Elastic Optical Networks by Varying the Bandwidth Granularity Based on Optical Path Fragmentation

Al-Tarawneh¹,

Taebi²

2017

J Laser Opt Photonics

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show abstract

“…We used m = 2 for evaluation purposes. In order to reduce the unlimited choices of NDAɡ(i) and LDAɡ(i), we constrained the range of ɡ into five integer values, which are {1,2,3,4,5}, as indicated in [14,20,21]. In Equations (2) and (3), γ stands for the fragmentation ratio over the optical path Pi.…”

Section: Dynamic Bw Granularity Adaptation Mechanismsmentioning

confidence: 99%

“…These topologies have been employed as a test bed by other works, such as in [14,20,21]. NSFNET has 14 stations indexed from 1 to 14 with 22 links, and the US backbone network has 24 stations, from 1 to 24 with 43 links.…”

Section: Network Topologies and Simulation Parameters Of The Test Netmentioning

confidence: 99%

Minimizing Blocking Probability in Elastic Optical Networks by Varying the Bandwidth Granularity Based on Optical Path Fragmentation

Al-Tarawneh

Taebi

2017

Photonics

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Elastic optical networks (EONs) based on orthogonal frequency-division multiplexing (OFDM) are considered a promising solution for the next optical network's generation. These networks make it possible to choose an adequate portion of the available spectrum to satisfy the requested capacity. In this paper, we consider the impact of spectrum fragmentation along the optical single/multipath routing transmission on the efficiency of the EONs. This involves reducing the fragmentation effects by dynamically updating and controlling the minimum bandwidth allocation granularity (g). We adopt linear and nonlinear dynamic mechanisms, which are denoted as LDAg and NLDAg, respectively, to choose proper bandwidth granularities that are proportional to the optical link/path bandwidth fragmentation status. In order to avoid either splitting the capacity request over many routing paths, which would increase the management complexity, or encouraging single path transmission, the proposed schemes aim to choose a proper bandwidth allocation granularity (g) for a predefined set of suggested values. Simulation results show that varying the bandwidth granularity based on the optical path fragmentation status can offer an improved performance over fixed granularity with respect to the bandwidth blocking probability, the number of path splitting actions, the throughput, and the differential delay constraint issue in terms of: the network bandwidth utilization and multipath distribution.

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“…A grade fixa possui canais uniformes de grossa granularidade, tendo uma largura de espectro de 50GHz [27]. Por outro lado, a mini grade fixa possui espaçamentos menores, com canais de menor granularidade, cuja largura espectral é de 12.5GHz [6,83]. Nas duas grades foram configuradas conexões de 40Gbps, representadas pela parte hachurada nas duas figuras.…”

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Agradeço ao meu orientador Prof. Dr. André Costa Drummond pelo incentivo e apoio conferidos a mim em toda a jornada do curso de mestrado e na realização deste trabalho.Também gostaria de agradecer aos demais professores Programa de Pós-Graduação em Informática, deste Departamento de Ciência da Computação, bem como à Universidade de Brasília, por contribuírem fortemente na minha formação.Aos amigos que fiz nesta instituição, com os quais aprendi imensamente, agradeço de coração pelas colaborações, incentivos, sugestões e toda atenção que recebi, em especial ao

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Linear dynamic adaptation of the BW granularity allocation for elastic optical OFDM networks

Cited by 7 publications

References 6 publications

Minimizing Blocking Probability in Elastic Optical Networks by Varying the Bandwidth Granularity Based on Optical Path Fragmentation

Minimizing Blocking Probability in Elastic Optical Networks by Varying the Bandwidth Granularity Based on Optical Path Fragmentation

Minimizing Blocking Probability in Elastic Optical Networks by Varying the Bandwidth Granularity Based on Optical Path Fragmentation

Provendo múltiplas transferências de dados em massa em redes ópticas elásticas

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