Limits of effective throughput of optical burst switches based on semiconductor optical amplifiers

Buchta, H.; Patzak, E.; Saniter, J.; Gauger, Christoph M.

doi:10.1109/ofc.2003.1247611

Cited by 17 publications

(11 citation statements)

References 3 publications

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“…The improved tolerance of DPSK towards crosstalk is particularly advantageous in optical networking environments, because due to imperfections of optical devices used to build network elements, such as OADMs, optical cross-connects, optical burst switches, as well as from spurious reflections inside the network, there are many leakage signals that interfere with the desired signal originating crosstalk [18]- [20]. It is well known that this phenomenon can be particularly damaging when the interference and the signal have the same nominal wavelength, leading to the so-called in-band or homodyne crosstalk, since in this case the signal-crosstalk beatings originated at the receiver can not be filtered out, becoming, as a consequence, an important source of signal quality degradation.…”

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confidence: 99%

Estimating the Performance of Direct-Detection DPSK in Optical Networking Environments Using Eigenfunction Expansion Techniques

Pires

Cancela

2010

J. Lightwave Technol.

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Abstract-In-band crosstalk, due to multiple interferers, has been identified as one of the most severe impairments in optical transparent networks, especially in the ones with a large number of nodes and a high wavelength density. Due to its robustness to in-band crosstalk differential phase-shift keying (DPSK) emerges as an attractive modulation scheme to be used in such environments. This paper proposes a rigorous formulation to estimate the performance of direct-detection DPSK receivers using an eigenfunction expansion technique in the time domain. The method takes into account both the in-band crosstalk, due to an arbitrary number of interfering terms, and the amplified spontaneous emission noise and is able to deal with any combination of optical and electrical filter shapes. Using this method the accuracy of an approximation based on the wideband optical filtering assumption was evaluated and shown that the approximation, although not providing reliable results for the error probabilities, can be used with confidence to compute power penalties due to in-band crosstalk. Furthermore, the crosstalk tolerance of DPSK over on-off keying was quantified and shown that this tolerance is reduced when the number of interferers increases.Index Terms-Differential phase-shift keying, eigenvalues and eigenfunctions, in-band crosstalk, optical networking.

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confidence: 99%

Estimating the Performance of Direct-Detection DPSK in Optical Networking Environments Using Eigenfunction Expansion Techniques

Pires

Cancela

2010

J. Lightwave Technol.

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“…Analytical, simulative or prototype studies indicate that they are in principle feasible with available technology. They have been reported to scale to more than one hundred wavelength channels for 4-8 input and output fibers [BGPS03] with state-of-the art components. As technology evolves, this can be expected to further improve.…”

Section: Switch Architecturesmentioning

confidence: 99%

“…These results were initially published in [BGPS03,GBPS03,GBP05]. It quantifies the impact of different architectural variants of tune-and-select (TAS) OBS nodes on maximum and maximum effective throughput.…”

Section: A2 Integrated Evaluation Of Performance and Technologymentioning

confidence: 99%

Novel Network Architecture for Optical Burst Transport

Gauger¹

2009

PIK - Praxis Der Informationsverarbeitung Und Kommunikation

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SummaryTransport networks form the backbone of communication networks by cost-efficiently offering huge bandwidth and by guaranteeing a high service quality and availability. These requirements can best be met by using optical communication technologies. Currently, wavelength-switching is the most prominent network technology employing optical fiber communication and wavelength division multiplexing. It transports data in circuit-switched wavelength channels, the so-called lightpaths. While for years progress in optical networks has been defined by ever increasing transmission bit-rates, higher flexibility and manageability as well as multi-service and multi-layer integration are equally important criteria today. Accounting for these trends, optical burst switching (OBS) has been proposed as a highly dynamic optical network architecture. It offers fine-granular transport of different packet-switched services and applies statistical multiplexing directly in the optical layer.This thesis presents the design, modeling, and evaluation of the optical burst transport network architecture (OBTN). The architecture is motivated by the need for flexible, scalable, and cost-efficient transport in next generation networks. In addition, it is stimulated by the research activities towards highly dynamic optical network infrastructures.OBTN defines a network architecture to transport and switch optical burst data in a core network. The design objectives for the OBTN architecture are (i) an overall high quality of service, (ii) a network design allowing for cost-efficiency and scalability, and (iii) a network evolution perspective based on the current wavelength-switched networks. These objectives are achieved by combining selected concepts, architectures, and strategies of optical burst and optical packet switching as well as of multi-layer traffic engineering.In order to provide the background information for the design of OBTN, Chapter 2 introduces the general characteristics, requirements, and trends for next generation transport networks. Also, it discusses the concept of layering in next generation networks and its application in layer networks for the virtualization of transport resources. Consequently, virtual topology design and dimensioning are analyzed to quantify the trade-offs regarding connectivity and resource requirements. Chapter 2 also reviews the fundamental technologies as well as currently emerging data and control plane architectures for optical transport networks. This presentation is then extended towards a long-term perspective. It describes architectural constraints and classification criteria for highly dynamic optical network architectures. These criteria are used to characterize the fast optical circuit switching, optical burst switching, and optical packet switching architectures. Then, hybrid optical network architectures are discussed as a framework to combine wavelength-switched and optical burst/packet-switched networks.i ii Summary Chapter 3 discusses the state of research and technology for o...

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“…Intermediate OBS nodes have to switch this transit traffic which requires a high number of costly burst switch ports and can cause physical node scalability problems. 8 Here, virtual topologies create new design opportunities, by offloading transit traffic to underlying lambda grids.…”

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confidence: 99%

Optical burst switching: the network perspective

Gauger

2005

SPIE Proceedings

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This paper motivates the combination of optical burst switching (OBS) networks with wavelength-routed networks which provide a virtual topology. Opportunities for advanced network design, support for important future transport network scenarios, and resilience as well as capacity adaptation functionality are among its key benefits.The paper discusses principal trade-offs, both qualitatively and quantitatively, regarding virtual topologies and statistical multiplexing in order to derive guidelines for resource efficient topology design. Then, the OBTN architecture is described, which can efficiently transport burst data over a virtual topology of lightpaths and can reduce the port count of optical burst-switched nodes. Finally, the OBTN dimensioning process is outlined and results of a unified performance and cost comparison are presented.

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Limits of effective throughput of optical burst switches based on semiconductor optical amplifiers

Cited by 17 publications

References 3 publications

Estimating the Performance of Direct-Detection DPSK in Optical Networking Environments Using Eigenfunction Expansion Techniques

Estimating the Performance of Direct-Detection DPSK in Optical Networking Environments Using Eigenfunction Expansion Techniques

Novel Network Architecture for Optical Burst Transport

Optical burst switching: the network perspective

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