Optical switching fabrics for terabit packet switches

Cuda, D.; Gaudino, Roberto; Gavilanes, G.; Neri, Fabio

doi:10.1017/cbo9780511920950.002

Cited by 6 publications

(11 citation statements)

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“…By comparing (4) and (11) presented in (12) therefore becomes also exact in this regime. Consequently, the approach of using (12) for conversion requirement probabilities provides exact results in both ends of the spectrum for r, namely for cases in which r ¼0 and r-1.…”

Section: State Aggregation-based Analytical Model Of A-mf-spiw and A-mentioning

confidence: 76%

“…At the same time, emerging and future Internet-based services [2,3] to support these user applications call for enhanced flexibility and reconfigurability in transport networks. Packet-based optical networking based on either optical packet switching or optical burst switching, is the most suitable solutions to achieve high network reconfiguration capability and flexibility and has been widely studied and demonstrated as feasible in the last decade [2,4].…”

Section: Introductionmentioning

confidence: 99%

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State aggregation-based model of asynchronous multi-fiber optical switching with shared wavelength converters

Akar

Raffaelli

Savi³

2013

Optical Switching and Networking

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a b s t r a c tThis paper proposes new analytical models to study optical packet switching architectures with multi-fiber interfaces and shared wavelength converters. The multi-fiber extension of the recently proposed Shared-Per-Input-Wavelength (SPIW) scheme is compared against the multi-fiber Shared-Per-Node (SPN) scheme in terms of cost and performance for asynchronous traffic. In addition to using Markov chains and fixed-point iterations for modeling the mono-fiber case, a novel state aggregation technique is proposed to evaluate the packet loss in asynchronous multi-fiber scenario. The accuracy of the performance models is validated by comparison with simulations in a wide variety of scenarios with both balanced and imbalanced input traffic. The proposed analytical models are shown to remarkably capture the actual system behavior in all scenarios we tested. The adoption of multi-fiber interfaces is shown to achieve remarkable savings in the number of wavelength converters employed and their range. In addition, the SPIW solution allows to save, in particular conditions, a significant number of optical gates compared to the SPN solution. Indeed, SPIW allows, if properly dimensioned, potential complexity and cost reduction compared to SPN, while providing similar performance.

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Section: State Aggregation-based Analytical Model Of A-mf-spiw and A-mentioning

confidence: 76%

Section: Introductionmentioning

confidence: 99%

State aggregation-based model of asynchronous multi-fiber optical switching with shared wavelength converters

Akar

Raffaelli

Savi³

2013

Optical Switching and Networking

View full text Add to dashboard Cite

show abstract

“…This result is important if we consider the architectures with passive interconnection structures [1], [4], in which the set of needed wavelengths is at least equal to N . Finally, there is an advantage in adopting a hybrid architecture with respect to the one composed only by a unique matrix of tunable MRRs (UM) [10].…”

Section: Hybrid Switching Backplane Architecturementioning

confidence: 99%

“…[1], [4]. Penalties due to physical impairments are taken into account by two constraints, on power budget and on Optical-Signal-to-Noise-Ratio (OSNR).…”

Section: Worst Case Analysismentioning

confidence: 99%

“…Given the strong motivations to adopt an optical switching backplane in place of an electronic backplane [1], here we investigate the card-to-card Optical Interconnection (OI). The literature presents some proposals of line card interconnection by means of all-optical passive switching fabrics; Semiconductor Optical Amplifiers (SOAs) and Arrayed Waveguide Gratings (AWGs) [2] are considered as implementation technologies [1], [3], [4]. Another suitable building block for the implementation of the optical-backplane architecture is the Micro Ring Resonator (MRR) [5].…”

Section: Introductionmentioning

confidence: 99%

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Hybrid Architecture for Optical Interconnection Based on Micro Ring Resonators

Siracusa

Linzalata

Maier

et al. 2011

2011 IEEE Global Telecommunications Conference - GLOBECOM 2011

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Future interconnection subsystems for switches and routers must overcome physical limitations of current electronic backplanes in order to achieve aggregate bandwidth much greater than today. Driven by this consideration we study the scalability of switching architectures implementing backplanes based on optical interconnection technology. In particular, this paper deals with the issue of interconnecting the line cards of a switch/router exploiting the wavelength agility of the transmitters and the switching/filtering capabilities of Micro Ring Resonators. To accomplish this task, the resonators deployed in the backplane are both tunable and fixed, thus defining a hybrid architecture. In our analysis we address feasibility and scalability issues in terms of maximum number of interconnected cards, taking various design parameters into account. Moreover, we perform a preliminary power consumption analysis of the proposed backplane architecture.

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Performance of ring-resonator based optical backplane in high capacity routers

Rizzelli

Siracusa

Maier

et al. 2013

2013 15th International Conference on Transparent Optical Networks (ICTON)

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The use of architectures that implement optical switching without any need of optoelectronic conversion allows us to overcome the limits imposed by today's electronic backplane, such as power consumption and dissipation, as well as power supply and footprint requirements. We propose a ring-resonator based optical backplanes for router line-card interconnections. In particular we investigate how the feasibility of the architecture is affected by the following parameters: number of line cards, switching-element round-trip losses, frequency drifting due to thermal variations and waveguide-crossing effects. Moreover, to quantify the signal distortions introduced by filtering operations, the noiseless eye diagrams for the different parameter conditions are shown in case of an onoff keying non-return-to-zero input signal at 10 Gb/s.

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Optical switching fabrics for terabit packet switches

Cited by 6 publications

References 0 publications

State aggregation-based model of asynchronous multi-fiber optical switching with shared wavelength converters

State aggregation-based model of asynchronous multi-fiber optical switching with shared wavelength converters

Hybrid Architecture for Optical Interconnection Based on Micro Ring Resonators

Performance of ring-resonator based optical backplane in high capacity routers

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