Path-Based Fragmentation Metric and RSA Algorithms for Elastic Optical Networks

Pederzolli, Federico; Siracusa, Domenico; Zanardi, Andrea; Galimberti, Gabriele; Fauci, D. La; Martinelli, Giovanni

doi:10.1364/jocn.11.000015

Cited by 38 publications

(26 citation statements)

References 17 publications

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“…The authors in [11] investigated the RSA approach based on the relationship between spectrum blocks' (SBs') accommodation capability and traffic bandwidth distribution. Reference [12] proposed two metrics including cut-based and alignment to evaluate fragmentation, then the authors of [20] defined the "wastedunusable-free ratio" fragmentation metric based on a certain path for connection requests. However, the abovementioned works do not evaluate the effect of the time dimension, which may lead to future fragmentation.…”

Section: Related Workmentioning

confidence: 99%

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3D Fragmentation Metric and RCSA Scheme for Space Division Multiplexing Elastic Optical Networks

et al. 2020

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The space division multiplexing elastic optical networks (SDM-EONs) based on multi-core fiber (MCF) are an effective solution to improve transmission capacity. In SDM-EONs, spectrum resources take on three-dimensional (3D) properties (i.e., frequency, time, and space), which brings new spatial constraints to network resource allocation. Meanwhile, the spectrum fragmentation in the network also present same characteristics with the setup and release of dynamic lightpath. To improve the success rate of transmission and the utilization of network resources, it is necessary to evaluate network fragmentation effectively from the three dimension. Therefore, this paper focuses on a new fragmentation measurement for SDM-EONs. Firstly, the 3D fragmentation metric is carried out considering the frequency-time-space domain. Then, routing, core, and spectrum allocation (RCSA) scheme is proposed to allocate the spectrum resource with minimal future fragmentation and core resource with maximal free resource reservation. Simulation results show the proposed scheme better in blocking probability, spectrum utilization, and fragmentation rate.

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Section: Related Workmentioning

confidence: 99%

“…Finally, the block with the minimum value of ASF R is allocated for the request R (step 15). Otherwise, the connection request R is blocked after total paths are searched (steps [16][17][18][19][20][21].…”

Section: Fragmentation-minimizing Rcsa Scheme-asfr-based Rcsamentioning

confidence: 99%

3D Fragmentation Metric and RCSA Scheme for Space Division Multiplexing Elastic Optical Networks

et al. 2020

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“…Pederzolli et al [26] proposed a two different heuristic algorithm that minimizes the fragmentation error metric. The two algorithms focus on fragmentation issues in Flexi-grid optical network.…”

Section: Physical Layer and Defragmentation Based Approachesmentioning

confidence: 99%

“…Holding time aware spectrum allocation algorithm [28] calculates minimum holding time difference that helps to improve the spectrum allocation performance compared with other algorithm. The Path based fragmentation metric (Wasted-Unusable Free Ratio (WUFR) [26] is reducing number connection blocking and performed well in dynamic situations. Comparing with proactive and reactive approaches this algorithms have a high computational complexity except [28 and 30].…”

Section: Physical Layer and Defragmentation Based Approachesmentioning

confidence: 99%

The Recent Contributions of Routing and Spectrum Assignment Algorithms in Elastic Optical Network (EON)

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2020

IJITEE

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The speed is an important aspect of the current generation of Internet users. Currently WDM based optical fiber technology provides a good solution, still it is insufficient for future growth of cloud data centers, social media applications, online gaming, high definition video streaming and broadcasting, etc. The Elastic Optical Networks (EONs) recently added an energetic research field in the fiber-optic network. The EON is next generation of network that can provide flexibly in spectrum, improved service provisioning and accommodate high bandwidth applications in the single channel. In WDM, the Routing and Wavelength Assignment (RWA) is problem, likewise the EON has Routing and Spectrum Assignment (RSA) problem. In RSA problem the frequency slots (FSs) should allocate in continuity and contiguous manner for every demand request. Many research articles are published over the years to find the new feasible solutions for the RSA problem. This paper presents the recent approaches based on routing and spectrum assignment problem and fragmentation schemes which examines and compare the performance, features, and complexity of the approaches. This paper provides merits and demerits of existing approaches in RSA problem and provides more information about the approaches it will help for feature research.

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“…To face the spectrum fragmentation, there are some works focused on the routing strategy [17], [22], [25], [26], and some others focused on the spectrum assignment [10], [14], [18], [21], [23], [27]- [33]. Besides, some works in the literature consider that the order in which users are served on the spectrum assignment solutions is considered significant on static network operation circumstances because it can directly impact the fragmentation of the spectrum and its available use [1], [27]- [33].…”

Section: Introductionmentioning

confidence: 99%

A Topology-Based Spectrum Assignment Solution for Static Elastic Optical Networks With Ring Topologies

2020

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Path-Based Fragmentation Metric and RSA Algorithms for Elastic Optical Networks

Cited by 38 publications

References 17 publications

3D Fragmentation Metric and RCSA Scheme for Space Division Multiplexing Elastic Optical Networks

3D Fragmentation Metric and RCSA Scheme for Space Division Multiplexing Elastic Optical Networks

The Recent Contributions of Routing and Spectrum Assignment Algorithms in Elastic Optical Network (EON)

A Topology-Based Spectrum Assignment Solution for Static Elastic Optical Networks With Ring Topologies

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