Transport network involving a reconfigurable WDM network layer-a European demonstration

Johansson, S.

doi:10.1109/50.511665

Cited by 35 publications

(8 citation statements)

References 5 publications

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“…If the number of delay-lines is kept constant, the possible traffic load will decrease when the burstiness is increased. For a 4 4 switch with a fixed and relatively low number of seven fiber delay-lines in the buffer, Fig. 11 clarifies the important role of the TOWC's.…”

Section: Influence Of Tuneable Wavelength Converters On the Numbermentioning

confidence: 84%

Wavelength conversion in optical packet switching

Danielsen

Hansen

Stubkjaer

1998

J. Lightwave Technol.

178

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Section: Influence Of Tuneable Wavelength Converters On the Numbermentioning

confidence: 84%

Wavelength conversion in optical packet switching

Danielsen

Hansen

Stubkjaer

1998

J. Lightwave Technol.

178

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“…In order to test our simulator we referred to a real network (SGN: Stockholm Gigabit Network) [7], realised in the framework of the RACE-MWTN project. In fact, our simulation results were compared with the experimental measures achieved on such a network.…”

Section: Iv-results and Discussionmentioning

confidence: 99%

Crosstalk in WDM optical networks

Avattaneo¹,

Iannone

Sabella³

1998

Optical Network Design and Modelling

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The impact of linear and non linear crosstalk on the transmission performances of multi-wavelength optical transport networks is analysed. A performance evaluation of some relevant geographical networks is also reported. I·INTRODUCTIONThe transmission capacity and the network nodes throughput are expected to increase more and more, due to the increasing demand for new services, towards the advent of broadband communications. The optical technology provides the possibility of significantly increase the transmission capacity and, by the use of wavelength division multiplexing technique, also allows switching and routing functions to be accomplished directly in the optical domain, without the need to convert the high speed signals in electrical format. The possibility of achieving such function quite independently of the transmission format and the signal speed, provide the network the property of transparency, which is a significant feature for building flexible networks.Different demonstrators and field trials have been realised [1,2]. In such experiments, it has been evidenced that the crosstalk, besides the node losses and the amplified spontaneous emission (ASE) noise due to optical amplifiers, represents the main limitation for the transmission performance of the network.The aim of this work is to analyse the limitations imposed by crosstalk to the performances of the WDM optical transport network layer. Optical Network Design and Modelling H. van As & A. Jukan (Eds.)

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“…This can be modelled by a graph: a node is a vertex and a link is an edge. Having multiple λs (WL1-WL3) we will represent a λ of a link as an edge in the graph of wavelengths, according to Figure 1 for the network proposed in [19]. To prioritise filling up λs one-by-one we can assign slightly different weights to different λ-channels of one link.…”

Section: Model Of Linksmentioning

confidence: 99%

Multi-Layer Traffic Engineering Through Adaptive λ-Path Fragmentation and De-fragmentation

Cinkler

Hegyi

Asztalos

et al. 2006

NETWORKING 2006. Networking Technologies, Services, and Protocols; Performance of Computer and Communication Networks; Mobile A

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Abstract. In Multi-Layer networks, where more than one layer is dynamic, i.e., connections are set up using not only the upper, e.g., IP layer but the underlying wavelength layer as well leads often to suboptimal performance due to long wavelength paths, that do not allow routing the traffic along the shortest path. The role of MLTE (Multi-Layer Traffic Engineering) is to cut these long wavelength paths into parts (fragments) that allow better routing at the upper layer (fragmentation), or to concatenate two or more fragments into longer paths (defragmentation) when the network load is low and therefore less hops are preferred.In this paper we present a new model (GG: Grooming Graph) and an algorithm for this model that supports Fragmentation and DeFragmentation of wavelength paths making the network always instantly adapt to changing traffic conditions. We introduce the notion of shadow capacities to model "lightpath tailoring". We implicitly assume that the wavelength paths carry such, e.g., IP traffic that can be interrupted for a few microseconds and that even allows minor packet reordering.To show the superior performance of our approach in various network and traffic conditions we have carried out an intensive simulation study.

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Transport network involving a reconfigurable WDM network layer-a European demonstration

Cited by 35 publications

References 5 publications

Wavelength conversion in optical packet switching

Wavelength conversion in optical packet switching

Crosstalk in WDM optical networks

Multi-Layer Traffic Engineering Through Adaptive λ-Path Fragmentation and De-fragmentation

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