New options and insights for survivable transport networks

Grover, W.D.; Doucette, John; Clouqueur, Matthieu; Leung, Dion; Stamatelakis, D.

doi:10.1109/35.978047

Cited by 80 publications

(52 citation statements)

References 10 publications

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“…A set of experiments was conducted to verify the proposed G-NFL scenario 1 . Two classes of random planar graphs were generated: one for dense and the other for sparse networks, typically with the number of nodes for inner faces is between 4 and 7, and an average nodal degree 4.0 and 2.8, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…Thus, an optical layer failure should be handled without relying on any electronic signaling protocol no matter the network optical domain has central or distributed control. Currently, only dedicated protection (i.e., 1+1) and pre-configured Cycle (p-Cycle) based approaches can achieve 50 ms or shorter restoration time in mesh networks due to their simplicity and pre-configured spare capacity, but at the expense of 70% or higher redundancy [1]. Note that failures are rare events, and allocating a significant amount of redundancy for failure recovery is not considered economically reasonable.…”

Section: Introductionmentioning

confidence: 99%

“…The switching capacity of the optical crossconnects (OXCs) and the wavelength links (WLs) along the P-LPs -although reserved -are shared among multiple PLPs and will be configured only after the failure occurs. Thus, improved capacity efficiency up to 30% of redundancy can be achieved [1] at the expense of extensive signaling mechanisms for real-time fault management and device configuration for P-LP setup, which possibly leads to hundreds of milliseconds of recovery time.…”

Section: Introductionmentioning

confidence: 99%

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Neighborhood Failure Localization in All-Optical Networks via Monitoring Trails

Tapolcai

Babarczi

et al. 2015

IEEE/ACM Trans. Networking

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Abstract-Shared protection, such as failure dependent protection (FDP), is well recognized for its outstanding capacity efficiency in all-optical mesh networks, at the expense of lengthy restoration time due to multi-hop signaling mechanisms for failure localization, notification, and device configuration. This paper investigates a novel monitoring trail (m-trail) scenario, called Global Neighborhood Failure Localization (G-NFL), that aims to enable any shared protection scheme, including FDP, for achieving all-optical and ultra-fast failure restoration. We firstly define neighborhood of a node, which is a set of links whose failure states should be known to the node in restoration of the corresponding working lightpaths (W-LPs). By assuming every node can obtain the on-off status of traversing m-trails and W-LPs via lambda monitoring, the proposed G-NFL problem routes a set of m-trails such that each node can localize any failure in its neighborhood. Bound analysis is performed on the minimum bandwidth required for m-trails under the proposed G-NFL problem. Then a simple yet efficient heuristic approach is presented. Extensive simulation is conducted to verify the proposed G-NFL scenario under a number of different definitions of nodal neighborhood which concern the extent of dependency between the monitoring plane and data plane. The effect of reusing the spare capacity by FDP for supporting m-trails is examined. We conclude that the proposed G-NFL scenario enables a general shared protection scheme, toward signaling-free and ultra-fast failure restoration like p-Cycle, while achieving optimal capacity efficiency as by FDP.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Neighborhood Failure Localization in All-Optical Networks via Monitoring Trails

Tapolcai

Babarczi

et al. 2015

IEEE/ACM Trans. Networking

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“…An important point, favorable to speed up switching for p-cycles, especially for those working on the logical link level, is that the connection controller interface (CCI) should support parallel switching. But even in presence of longer switching times, it is worth noting that p-cycles have been invented to help in this issue, since the research which has led to p-cycles aimed at "an average-case speed-up for mesh networks where cross-connect time was the limiting factor" [28]; for p-cycles only two ring-like switchings are necessary, under the assumption of no protection capacity sharing with other p-cycles.…”

Section: Protection Switching Timesmentioning

confidence: 99%

Automatic protection switching for p-cycles in WDM networks

Schupke

2005

Optical Switching and Networking

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Abstractp-Cycle recovery relies on a protection switching protocol. We detail several issues for such a protocol taking the evolution from ring networks to p-cycles into account. In particular, we propose and evaluate a protocol enhancement to provide means for node failure protection. For the evaluation, we describe an integer linear program, which is applied to network design case studies, and formulate availability models for p-cycles. The case studies show that the protocol enhancement improves availability at marginal additional design cost.

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“…Thus, an optical layer failure should be handled without relying on any electronic signaling protocol no matter the network optical domain has central or distributed control. Currently, only dedicated protection (i.e., 1+1) and pre-configured Cycle (p-Cycle) based approaches can achieve 50ms or shorter restoration time in mesh networks due to their simplicity and pre-configured spare capacity, but at the expense of 70% or higher redundancy [1]. Note that failures are rare events, and allocating a significant amount of redundancy for failure recovery is not considered economically reasonable.…”

Section: Introductionmentioning

confidence: 99%

On achieving all-optical failure restoration via monitoring trails

Tapolcai

Babarczi

et al. 2013

2013 Proceedings IEEE INFOCOM

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Abstract-The paper investigates a novel monitoring trail (mtrail) scenario that can enable any shared protection scheme for achieving all-optical and ultra-fast failure restoration. Given a set of working (W-LPs) and protection (P-LPs) lightpaths, we firstly define the neighborhood of a node, which is a set of links whose failure states should be known to the node in restoration of the corresponding W-LPs. A set of m-trails is routed such that each node can localize any failure in its neighborhood according to the ON-OFF status of the traversing m-trails. Bound analysis is performed on the minimum bandwidth required for the m-trails. Extensive simulation is conducted to verify the proposed scheme.

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New options and insights for survivable transport networks

Cited by 80 publications

References 10 publications

Neighborhood Failure Localization in All-Optical Networks via Monitoring Trails

Neighborhood Failure Localization in All-Optical Networks via Monitoring Trails

Automatic protection switching for p-cycles in WDM networks

On achieving all-optical failure restoration via monitoring trails

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