Route Partitioning Scheme for Elastic Optical Networks With Hitless Defragmentation

Ba, Seydou; Chatterjee, Bijoy Chand; Okamoto, Satoru; Yamanaka, Naoaki; Fumagalli, Andrea; Oki, Eiji

doi:10.1364/jocn.8.000356

Cited by 57 publications

(15 citation statements)

References 16 publications

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“…EON enables an efficient use of spectrum resources combining dynamic routing and spectrum assignment (RSA) schemes with defragmentation techniques [16]. However, highly loaded scenarios may generate "end-of-line situations", defined by [16] as cases in which the defragmentation is not able to consolidate scattered frequency slots (FS) in the network.…”

Section: Tso In Elastic Optical Network To Reduce Disruption Time Fomentioning

confidence: 99%

On the importance of time-synchronized operations in Software-Defined electronic and optical networks

Garrich

Muqaddas

Giaccone

et al. 2017

2017 19th International Conference on Transparent Optical Networks (ICTON)

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The utilization of time-synchronized operations (TSO) is gaining interest in the research community on Software-Defined Networking (SDN). This paper discusses TSO applicability in electronic packet and optical networks. In electronic packet networks, the TSO approach has been shown to improve network performance, thanks to timed network updates. In optical networks, this approach enables novel security applications and permits to reduce lightpath disruption time. We finally discuss TSO further potentialities and requirements regarding clock availability in network elements.

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Section: Tso In Elastic Optical Network To Reduce Disruption Time Fomentioning

confidence: 99%

On the importance of time-synchronized operations in Software-Defined electronic and optical networks

Garrich

Muqaddas

Giaccone

et al. 2017

2017 19th International Conference on Transparent Optical Networks (ICTON)

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“…The authors in Ba et al proposed a defragmentation approach for unicast traffic demands in EON. A route partitioning approach is proposed with first‐last‐fit spectrum assignment and it allows better traffic admissibility.…”

Section: Introductionmentioning

confidence: 99%

Traffic grooming and clique partitioning‐based spectrum assignment in elastic optical networks

Choudhury

Agarwal

2020

Int J Communication

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We adopt a fragmentation reducing policy for spectrum assignment and incorporate it with multicast traffic grooming in EON. To reduce fragmentation, the spectrum is partitioned based on the clique partitioning approach and spectral slots are assigned to traffic demands depending on which partition they belong. Simulation results predict that the proposed approach has better spectrum slot utilization compared to the state-of-the-art non-partitioning approach and the proposed approach reduces fragmentation, and also has less blocking ratio compared to the state-of-the-art partitioning approach.

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“…In addition, the entire bandwidth of the connections must be contiguously allocated, also referred as the spectrum contiguity constraint. The Routing and Spectrum Allocation (RSA) problem in FlexGrid optical networks has been widely studied, considering the static traffic case (network planning phase) as well as dynamic (in operation) network scenarios [3][4][5][6][7][8][9][10][11][12][13]. There, connection arrival and departure processes are random and the network has to accommodate incoming traffic in real time.…”

Section: Introductionmentioning

confidence: 99%

“…In a dynamic scenario, the spectral resources allocated to connections are released upon tear down, becoming available for future requests. The randomness in the connections birth and death processes leads to fragmentation [6,14] of the spectral resources in the network, which is an important drawback of EONs.…”

Section: Introductionmentioning

confidence: 99%

Optimized traffic profile for FlexGrid optical networks

Liu

Comellas

2017

Photon Netw Commun

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This work is focused on studying the connections bandwidth distribution effects on the FlexGrid network performance. An accurate study of spectrum occupancy in heavy loaded FlexGrid optical networks is carried out. This analysis is useful to figure out which traffic profiles are more suitable for this kind of networks. Two different cases are considered with respect to the offered connections. In the Elastic case, connections sizes can take any value from 1 to a maximum number of spectrum slots. In the MultiRate case, only three connections sizes are allowed. It is demonstrated that by generating the connections with some specific statistical properties, the network performance is improved. These properties are derived from the theoretical study of spectrum occupation in ideal conditions. The main contribution of this work is therefore the proposal of an Optimum traffic profile which allows to efficiently using the spectrum in FlexGrid optical networks. The gain obtained by generating the proposed traffic profile is evaluated by means of simulations at the link as well as at the whole network level.

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Route Partitioning Scheme for Elastic Optical Networks With Hitless Defragmentation

Cited by 57 publications

References 16 publications

On the importance of time-synchronized operations in Software-Defined electronic and optical networks

On the importance of time-synchronized operations in Software-Defined electronic and optical networks

Traffic grooming and clique partitioning‐based spectrum assignment in elastic optical networks

Optimized traffic profile for FlexGrid optical networks

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