IP over Optical Networks: A Framework

Rajagopalan, Bala; Luciani, J.; Awduche, D.

doi:10.17487/rfc3717

Cited by 70 publications

(69 citation statements)

References 7 publications

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“…Transparency is often also used in a more general sense. Then, it refers to an optical signal which is transported from transmitter to receiver entirely in the optical domain without O/E/O conversions [RFC3717].…”

Section: Optical Networkingmentioning

confidence: 99%

“…ITU-T and IETF both formulated their requirements, key issues and candidate models for the control plane. While the ITU requirements for automatic switched transport networks (ASTN [G.807]) are network technology independent, IETF's IP over optical networks framework [RFC3717] is more centered around the interaction of IP/MPLS and optical networks. Both standard bodies focus on IP-based protocols in the optical control plane-non-IP protocols are not excluded though.…”

Section: Control Of Optical Transport Networkmentioning

confidence: 99%

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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: Optical Networkingmentioning

confidence: 99%

Section: Control Of Optical Transport Networkmentioning

confidence: 99%

Novel Network Architecture for Optical Burst Transport

Gauger¹

2009

PIK - Praxis Der Informationsverarbeitung Und Kommunikation

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“…Another restriction for path Iayout are Shared Risk Link Groups (SRLGs) [ 15,16,17] which group network elements tagether that may fail simultaneously with a high probability. For instance, all links originating at the same router fail if the router goes down.…”

Section: Restrietions For Path Layoutmentioning

confidence: 99%

Self-Protecting Multipaths – A Simple and Resource-Efficient Protection Switching Mechanism for MPLS Networks

Menth

Reifert

Milbrandt

2004

Lecture Notes in Computer Science

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Abstract. In this paper we propose the concept of an end-to-end (e2e) SelfProtecting Multi-Path (SPM) as a protection switching mechanism that may be implemented, e.g., in Multiprotocol Label Switching (MPLS) networks. In case of local outages, resilient networks redirect the traffic from a failed link over an e2e backup path to its destination. In this case, Quality of Service (QoS) can only be provided if sufficient extra capacity is available. If backup capacity can be shared among different backup paths, multi-path routing allows for considerable savings regarding this extra capacity. The SPM consists of disjoint paths that carry the traffic bothin normal operation mode and during local outages. If a partial path is affected by a network failure, the traffic is just distributed to the remaining working paths. This structure is easy to configure and the switching to failure mode operation is simple since no signalling is required. Based on analytical results, we show that Ioad balancing of the traffic across the disjoint paths can reduce the required backup capacity significantly. The backup performance depends strongly on the network topology, and the SPM outperforms simple Open Shortest Path First (OSPF) rerouting by far.

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“…Under the overlay model [13], neither layer network has a complete view of the other. In this case, from a global view, some care needs to be taken when allocating capacity or minimizing capacity costs because this can sometimes lead to different solutions from different perspectives of the top-and bottom-layer network providers; however, this situation is beyond the scope of this paper.…”

Section: Introductionmentioning

confidence: 99%

The Effects of Multi-Layer Traffic on the Survivability of IP-Over-WDM Networks

Pacharintanakul

Tipper

2009

2009 IEEE International Conference on Communications

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Abstract-The survivability of backbone networks to failures is an on-going concern. This paper investigates survivability strategies for IP-over-WDM networks in a multi-layer framework where traffic originates at each layer. We present an optimizationbased formulation of performing recovery mechanisms at the bottom layer for both layers of traffic in two cases: With capacity sharing between backup paths of the traffic in two layers and without. We then study and compare spare capacity requirements under multi-layer traffic ratios and the impact of network connectivity. Numerical results indicate that, in such a wavelength-based optical network, implementing survivability of all traffic at the bottom layer can be a viable solution with significant advantages.

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IP over Optical Networks: A Framework

Cited by 70 publications

References 7 publications

Novel Network Architecture for Optical Burst Transport

Novel Network Architecture for Optical Burst Transport

Self-Protecting Multipaths – A Simple and Resource-Efficient Protection Switching Mechanism for MPLS Networks

The Effects of Multi-Layer Traffic on the Survivability of IP-Over-WDM Networks

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