Experimental Demonstration of a Gridless Multi-granular Optical Network Supporting Flexible Spectrum Switching

Amaya, Norberto; Muhammad, Ishaq Gul; Zervas, Georgios; Nejabati, Reza; Simeodinou, D.; Zhou, Yang; Lord, Andrew

doi:10.1364/ofc.2011.omw3

Cited by 26 publications

(22 citation statements)

References 2 publications

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“…In such a case, demands request a portion of spectrum, equivalent to a number of Frequency Slots (FSs) that can be efficiently allocated and switched thanks to the use of optical Orthogonal Frequency Division Multiplexing (OFDM) [11] and Bandwidth Variable Wavelength Cross Connects (BV-WXC) [12], [13].…”

Section: Assumptionsmentioning

confidence: 99%

Optimal allocation of virtual optical networks for the future internet

Pages¹,

Perelló²,

Spadaro³

et al. 2012

2012 16th International Conference on Optical Network Design and Modelling (ONDM)

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Abstract-Optical network infrastructures can be partitioned into multiple parallel, dedicated virtual networks for a physical infrastructure sharing purpose. However, different transport technologies may impact in both the amount and the characteristics of the different virtual instances that can be built on top of a single physical infrastructure. To analyse the impact of the transport technology in this regard, we present exact Integer Linear Programming (ILP) formulations that address the off-line problem of optimally allocate a set of virtual networks in two kind of substrates: wavelength switching and spectrum switching. Both formulations serve the purpose to provide opaque transport services from the virtual network point of view, where electronic terminations are assumed in the virtual network nodes. We carry out a series of experiments to validate the presented formulations and determine which is the impact of both substrates in the number of virtual networks that can be optimally allocated in the transport network.

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Section: Assumptionsmentioning

confidence: 99%

Optimal allocation of virtual optical networks for the future internet

Pages¹,

Perelló²,

Spadaro³

et al. 2012

2012 16th International Conference on Optical Network Design and Modelling (ONDM)

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“…Then, the number of FSs needed by a demand is equal to the ceiling of the division between the bandwidth of the demand and the spectral width of a single FS. It shall be mentioned, though, that existent BV-WXC technologies require guard bands between signals to perform the switching adequately [3]. Hence, considering the presence of the guard bands as well, the number of FSs to allocate a demand is:…”

Section: Proposed Mechanismmentioning

confidence: 99%

“…SLICE aims to offer a flexible network environment suitable for providing subwavelength granularity for low data-rate transmissions and super-wavelength granularity for ultra-high capacity transmissions. The enabling technology for the SLICE architecture is Orthogonal Frequency Division Multiplexing (OFDM), jointly with the Bandwidth Variable Wavelength Cross Connects (BV-WXC) [3], [4]. Despite the many advantages of OFDM, and its widespread use in wireless communications, OFDM has been recently introduced as a modulation format in optical communications [5].…”

Section: Introductionmentioning

confidence: 99%

Lightpath fragmentation for efficient spectrum utilization in dynamic elastic optical networks

Pages

Perelló

Spadaro

2012

2012 16th International Conference on Optical Network Design and Modelling (ONDM)

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Abstract-The spectrum-sliced elastic optical path network (SLICE) architecture has been presented as an efficient solution for flexible bandwidth allocation in optical networks. An homologous problem to the classical Routing and Wavelength Assignment (RWA) arises in such an architecture, called Routing and Spectrum Assignment (RSA). Imposed by current transmission technologies enabling the elastic optical network concept, the spectrum contiguity constraint must be ensured in the RSA problem, meaning that the bandwidth requested by any connection must be allocated over a contiguous portion of the spectrum along the path between source and destination nodes. In a dynamic network scenario, where incoming connections are established and disconnected in a quite random fashion, spectral resources tend to be highly fragmented, preventing the allocation of large contiguous spectrum portions for high datarate connection requests. As a result, high data-rate connections experience unfairly increased bocking probability in contrast to low data-rate ones. In view of this, the present article proposes a lightpath fragmentation mechanism that makes use of the idle transponders in the source node of a high data-rate connection request to fragment it into multiple low data-rate ones, more easily allocable in the network. Besides, aiming to support such an operation, a light-weight RSA algorithm is also proposed so as to properly allocate the generated lightpath fragments over the spectrum. Benefits of the proposed approach are quantified through extensive simulations, showing drastically reduced high data-rate connection blocking probability compared to a usual contiguous bandwidth allocation, while keeping the performance of low data-rate requests to similar levels.

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“…O BV-WXC pode assumir dois tipos de arquitetura: (i) difusão e seleção (broadcast-andselect) [18] ou (ii) não difusão e seleção (non-broadcast-and-select) [37]. A estrutura do BV-WXC precisa suportar as seguintes características [38]: Figura 2.11: Arquitetura de um BV-WXC: a) arquitetura de difusão e seleção; b) arquitetura de não difusão e seleção.…”

Section: Bv-wxcunclassified

“…Em [37], foi demonstrado o uso de um BV-SSS suportando a granularidade de 1 GHz de espectro. Da mesma maneira, em [80,81] foram realizadas experiências que mostraram a viabilidade do uso de filtros BV-SSS com granularidades de tráfego de 2, 5 Gb/s a 160 Gb/s e granularidades de espectro de 13, 2 GHz.…”

Section: Arquitetura E Tecnologia De Dispositivosunclassified

Potencializando a modulação adaptativa com roteamento em múltiplos saltos em redes ópticas elásticas

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Experimental Demonstration of a Gridless Multi-granular Optical Network Supporting Flexible Spectrum Switching

Cited by 26 publications

References 2 publications

Optimal allocation of virtual optical networks for the future internet

Optimal allocation of virtual optical networks for the future internet

Lightpath fragmentation for efficient spectrum utilization in dynamic elastic optical networks

Potencializando a modulação adaptativa com roteamento em múltiplos saltos em redes ópticas elásticas

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