Availability optimization of static path-protected WDM networks

Tornatore, Massimo; Maier, Guido; Pattavina, Achille; Martinelli, Mario; Villa, M.; Righetti, A.; Clemente, R.

doi:10.1109/ofc.2003.316142

Cited by 10 publications

(4 citation statements)

References 3 publications

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“…One of the few examples in literature is [37], where availability is optimized when dealing with share path protection. However, the physical interconnection is a fixed input parameter and not the output result.…”

Section: Objective Functionmentioning

confidence: 99%

A Methodology for Physical Interconnection Decisions of Next Generation Transport Networks

et al. 2011

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The physical interconnection for optical transport networks has critical relevance in the overall network performance and deployment costs. As telecommunication services and technologies evolve, the provisioning of higher capacity and reliability levels is becoming essential for the proper development of Next Generation Networks. Currently, there is a lack of specific procedures that describe the basic guidelines to design such networks better than "best possible performance for the lowest investment". Therefore, the research from different points of view will allow a broader space of possibilities when designing the physical network interconnection. This paper develops and presents a methodology in order to deal with aspects related to the interconnection problem of optical transport networks. This methodology is presented as independent puzzle pieces, covering diverse topics going from novel design criteria to well-known organized topologies. These can be used to investigate the influence of the physical interconnection of networks over their performance properties, and draw conclusions to improve the current decision support techniques related to this theme. In addition, several examples of the use of this methodology are presented.

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Section: Objective Functionmentioning

confidence: 99%

A Methodology for Physical Interconnection Decisions of Next Generation Transport Networks

et al. 2011

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“…Such a cycle could be found by nonliner programming, with a high computational complexity. We propose instead the following heuristic method [9]. Two known algorithms can be applied to find a cycle on a weighted graph: the "one-step" (or Bhandari [22]), finds the link-disjoint pair of paths having the minimum total weight ; the "two-step" (or repeated Dijkstra), assigns as working the least-unavailability path and as protection the second link-disjoint least-unavailability path .…”

Section: A Mcad-dedicated Path Protectionmentioning

confidence: 99%

“…Most of the recent works published in the area of OTN availability design covered only DPP [4]- [7], [9]. Some studies have been recently published to analyze availability in SPP scenario: authors in [10] and [11] investigate how setting a limit on the number of connections that share the same pool of backup resources can improve the average connection availability in the network, without causing a significant paying off in capacity requirements; [12] propose to use connection availability as a metric to provide differentiated protection service, recurring to different protection strategies, under a static traffic assignment; novel availability-aware strategies for dynamic traffic have been proposed in [13] and [14], where authors exploit availabilitybased metric to take on-the-fly routing decision.…”

Section: Introductionmentioning

confidence: 99%

Availability design of optical transport networks

Tornatore

Maier²,

Pattavina

2005

IEEE J. Select. Areas Commun.

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Abstract-A design technique for reliable optical transport networks is presented. The network is first dimensioned in order to carry a given set of static protected optical connections, each one routed maximizing its availability. The network can be further optimized by minimizing the number of fibers to be installed, while keeping a control on connection availability, which can remain the same or decrease by a prefixed margin factor. Design and optimization algorithms are provided for networks adopting dedicated and shared path-protection. The optimization approach is heuristic. Results obtained by applying the proposed technique to two casestudy networks are shown and discussed. These two case-study experiments are carried out exploiting a realistic model to evaluate terrestrial and submarine optical link availability.Index Terms-Deterministic network calculus, mathematical programming/optimization, system design.

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“…The second is a subnetwork extracted from a realistic model of the topology of the Italian backbone fiber network presented in Ref. 22 Fig. 5b the number of fibers of the network optimized without taking the propagation constraint into account is also reported (the horizontal line): the constrained optimization requires on average 17% more fibers.…”

Section: Case-study Analysismentioning

confidence: 99%

OTN network design and optimization under the optical amplifier noise constraint

Maier¹,

Gibellini²,

Pattavina

et al. 2003

SPIE Proceedings

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I-design method is proposed that minimizes the deployment cost of a network when only a limited number of OXCs is capable of 3-R regeneration. Optimization, based on a given static-traffic matrix, is carried out by routing lightpaths with constrained signal degradation. Constraint-based routing and wavelength assignment is performed considering accumulation of noise due to amplified spontaneous emission of optical amplifiers as the major cause of signal degradation. A general multilayer design and optimization procedure is developed and applied to some case-study networks. The effects ofthe variation ofdesign parameters such as amplification-span length, wavelength conversion capability distribution and optical protection capability is investigated.

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Availability optimization of static path-protected WDM networks

Abstract: We developed a heuristic procedure to optimize WDM networks with reliability as objective function. Optimization experiments have been carried out on a case study network, exploring the trade-off between network cost and reliability.

Cited by 10 publications

References 3 publications

A Methodology for Physical Interconnection Decisions of Next Generation Transport Networks

A Methodology for Physical Interconnection Decisions of Next Generation Transport Networks

Availability design of optical transport networks

OTN network design and optimization under the optical amplifier noise constraint

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