NDLI: A translucent OBS node architecture to improve traffic emission and loss probability

Content Provider	IEEE Xplore Digital Library
Author	Coutelen, T. Jaumard, B. Hebuterne, G.
Copyright Year	2009
Description	Author affiliation: CIISE, Concordia University, Montreal, Qc, H3G 1M8, Canada (Jaumard, B.) \|\| Télécom-SudParis, UMR CNRS Samovar, Evry, France (Hebuterne, G.) \|\| ECE, Concordia University, Montreal, Qc, H3G 1M8, Canada (Coutelen, T.)
Abstract	All-optical circuit switching prevents contention by forbidding multiplexing beyond the wavelength granularity. The drawbacks of such a coarse granularity can be reduced thanks to translucent architectures with MSPPs (MultiService Provisioning Platforms). Another switching paradigm of interest is offered by the Optical Burst Switching (OBS) that manages finer granularity transfers but that encounters contentions, potentially entailing high loss rates. In this paper, within the context of core networks, we describe a translucent OBS architecture that performs intermediate re-aggregation and allows the reduction of the loss rate by interceding at two levels: Firstly, it provides sparse electrical buffering accessibility and, secondly, it uses aggregation grooming in order to reduce the aggregation delay and the traffic contention probability. A careful analysis of the traffic behavior in core networks leads us to propose an accurate traffic model, called $LCH^{+},$ i.e., an enhanced Lost Call Held (LCH) model. Data plane transparency is then exploited to modulate the traffic at its emission. Extensive experiments show that re-aggregation helps reducing the loss probability thanks to electrical buffers whereas the aggregation grooming mitigates the drawbacks induced by electrical buffering on the delay and on the network cost. In addition, we show that the proposed translucent architecture can be highly valuable in clustered large core networks.
Starting Page	1
Ending Page	8
File Size	7548400
Page Count	8
File Format	PDF
ISBN	9789639799493
DOI	10.4108/ICST.BROADNETS2009.7869
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-09-14
Publisher Place	Spain
Access Restriction	Subscribed
Rights Holder	ICST
Subject Keyword	Traffic control Telecommunication traffic Optical buffering Optical losses Delay Switching circuits Telecommunication switching Optical burst switching Protocols Quality of service
Content Type	Text
Resource Type	Article

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