Regenerator allocation strategies for optical transparency domains considering transmission limitations

Scheffel, Matthias

doi:10.1109/icc.2005.1494646

Cited by 5 publications

(3 citation statements)

References 4 publications

(2 reference statements)

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“…Previous work on the regenerator placement topic [13,14] focused mostly on solving two fundamental issues: minimization of the total number of regenerators installed and location selection for the regenerators. The first objective consists in quantifying the minimum number of OEO units assuring end-to-end connectivity with the desired communication quality.…”

Section: Collocated Regeneration and Differential Delay Compensationmentioning

confidence: 99%

Optical transport network design with collocated regeneration and differential delay compensation

Santos

Pedro

Eira

et al. 2012

2012 IEEE 13th International Conference on High Performance Switching and Routing

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A potentially cost-effective approach for augmenting the transmission capacity in an optical transport network (OTN) consists of bundling several optical channels by means of an inverse-multiplexing strategy, e.g. virtual concatenation (VCAT). When VCAT is employed together with multipath routing, the differential delay between concatenated channels needs to be compensated via electrical buffering. To avoid installing large and costly high-speed buffers, this compensation can be dispersed throughout the intermediate path nodes. With this distributed scheme, each intermediate compensation operation requires an optical-electrical-optical (OEO) converter. Such converters, which are typically employed to allow electrical processing (e.g. signal regeneration, traffic switching/grooming, etc.), represent the largest contributor to the capital expenditures of an optical network. Hence, to save on OEO equipment and keep the network cost-effectiveness, we propose the novel approach of collocating the differential delay buffering and the regeneration on the same network element, enabling the implementation of distributed schemes with minimal link capacity levels, OEO count, and buffer size requirements. To effectively design an OTN network under these conditions, we also present a new multi-step optimization framework based on integer linear programming (ILP) modeling. To test our approach, emerging 100 Gb/s Ethernet services are established over two reference networks using virtually-concatenated 40 Gb/s channels. The correspondent results confirm that relevant OEO/regenerator count savings (ranging from 23% to 44%) can be attained with the collocated approach while the buffer sizes are maintained reasonably small. We also show that the end-to-end transmission latency is not affected by the adoption of this collocated strategy.

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Section: Collocated Regeneration and Differential Delay Compensationmentioning

confidence: 99%

Optical transport network design with collocated regeneration and differential delay compensation

Santos

Pedro

Eira

et al. 2012

2012 IEEE 13th International Conference on High Performance Switching and Routing

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“…However, the same study [1] argues that network management and operation becomes more complex when all nodes are 3R nodes (Le., full placement). For example, limiting the number of 3R nodes (Le., sparse placement) could reduce both the complexity of the routing protocol and the connection…”

Section: Introductionmentioning

confidence: 95%

“…The most common strategies deal with minimizing the number of 3R units needed in the network, or with minimizing the number of 3R nodes [10]- [14], Le., nodes where 3R units are available. A recent work [1] shows that if the network designer places the 3R units on a per-path-basis, for each static lightpath in the network, a smaller number of 3R units is required when allowing any node in the network to carry 3R units, compared to the case where only a subset of nodes is permitted to have 3R units.…”

Section: Introductionmentioning

confidence: 98%

Trading network management complexity for blocking probability when placing optical regenerators

Savasini

Monti

Tacca

et al. 2008

2008 International Conference on High Performance Switching and Routing

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Optical signal regenerators (3R) are required to overcome the adverse effect of fiber and other transmission impairments. 3R units may be placed either at every node (full placement) or at some selected nodes (sparse placement) of the optical network. It has been argued [1] that while the latter placement strategy may not be optimal in terms of the total number of 3R units required to support a given set of static traffic demands, it offers a number of practical advantages over the former, e.g., a contained complexity of network management in terms of signaling overhead.In this paper the full and sparse placement strategies are compared in a dynamic optical network, whereby Iightpaths are set up and tom down to best fit the offered changing demands. The study shows that the blocking probability due to the lack of available 3R units achieved by the sparse placement strategy may be comparable to the one achieved by the full placement strategy. Surprisingly, it may even be lower in some cases, thus providing an additional motivation in favor of the sparse placement strategy. The study also shows that the algorithm used to choose the nodes where to place the 3R units must be designed carefully. Two placement algorithms are compared, reporting differences in signaling overhead level as high as 6 times (when achieving a desired level of Iightpath connectivity) and differences in blocking probabilities as high as two orders of magnitude (when using the same level of signaling overhead).

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A survey on regenerator Placement Problem in translucent optical network

Nath

Chatterjee²,

Bhattacharya

2014

2014 International Conference on Circuits, Systems, Communication and Information Technology Applications (CSCITA)

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Regenerator allocation strategies for optical transparency domains considering transmission limitations

Cited by 5 publications

References 4 publications

Optical transport network design with collocated regeneration and differential delay compensation

Optical transport network design with collocated regeneration and differential delay compensation

Trading network management complexity for blocking probability when placing optical regenerators

A survey on regenerator Placement Problem in translucent optical network

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