Comparison of contention resolution strategies in OBS network scenarios

Gauger, Christoph M.; Köhn, Martin; Scharf, Joachim

doi:10.1109/icton.2004.1360237

Cited by 40 publications

(30 citation statements)

References 6 publications

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“…Still, such instability has been proven for a symmetrical four node network with variable-length bursts and limited-range wavelength conversion in [ZLVR + 04]. However, such behavior was neither found in other published nor in own work in the case of OBS with full wavelength conversion, variable-length bursts, and irregular mesh topologies [GKS04b,GKZM05]. As can be seen from Table 3.3, most proposals proactively approach this topic and closely control deflections to avoid excessively long routes or even instability in case of high load.…”

Section: Alternative/deflection Routingmentioning

confidence: 85%

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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Section: Alternative/deflection Routingmentioning

confidence: 85%

Novel Network Architecture for Optical Burst Transport

Gauger¹

2009

PIK - Praxis Der Informationsverarbeitung Und Kommunikation

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“…Though numerous approaches like optical buffering, and wavelength conversion had been proposed to solve the wavelength contention problem in OBS, due to the technological and economical limitations most of the schemes seem to be impractical [2], [3] and [4].…”

Section: Figure 1 Schematic Diagram Of Obs Networkmentioning

confidence: 99%

Deflection Routing in OBS Networks

Thachayani¹,

Nakkeeran²

2013

IJCATR

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Optical Burst Switching (OBS) network proposed as future optical internet is capable of carrying bursty traffic and adapting to the present technological constraints. Since the OBS network is buffer-less in nature, contention resolution using deflection technique received much attention. Deflection routing can work with limited optical buffering or even no buffering. This paper gives an overview of the research done so far in this area of deflection routing in OBS networks.

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“…4 depicts burst loss probability versus relative offered load (cf. [20] for detailed description of the scenario). It can be seen that for high loads the schemes employing deflection routing after conversion are inefficient as they produce additional load in an already highly loaded network.…”

Section: Comparison Of Contention Resolution Mechanismsmentioning

confidence: 99%

Research in optical burst switching within the e-Photon/ONe network of excellence

Aracil

Akar

Bjornstad

et al. 2007

Optical Switching and Networking

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This paper presents a summary of Optical Burst Switching (OBS) research within the VI framework program e-Photon/ONe network of excellence. The paper includes network aspects such as routing techniques, resilience and contention resolution, together with burst switch architectures. On the other hand, we also discuss traffic analysis issues, Quality of Service (QoS) schemes, TCP/IP over OBS and physical layer aspects for OBS.

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Comparison of contention resolution strategies in OBS network scenarios

Cited by 40 publications

References 6 publications

Novel Network Architecture for Optical Burst Transport

Novel Network Architecture for Optical Burst Transport

Deflection Routing in OBS Networks

Research in optical burst switching within the e-Photon/ONe network of excellence

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