Optical Packet Switching of IP Traffic

Bregni, Stefano; Guerra, G.; Pattavina, Achille

doi:10.1007/978-0-387-35670-9_9

Cited by 10 publications

(9 citation statements)

References 9 publications

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“…Based on measurement of real IP traffic [7], the following packet 1 Note that under this hypothesis structure (a) needs to be implemented in a multi-plane node. 13 length distribution has been assumed: The number of wavelengths per channel connected to every switching plane is a key parameter to improve node performance, due to the channel grouping phenomenon, as was pointed out in [4] and [5].…”

Section: Performance Resultsmentioning

confidence: 99%

“…Previous works considered the employment of optical FIFO buffering, but optical scheduling obviously resulted a better choice. The reader is referred to [4] for a deeper analysis of this topic.…”

Section: B Fiber Delay Lines Unitmentioning

confidence: 99%

“…Apparently most of the operations related to the packet header processing needs to be done in the electronic domain. This paper deals with the architecture of an optical packet switching node first proposed in [4] [5], which is equipped with a fiber delay line stage used as an input buffer for optical packets. Two new alternative structures of the switching core of the node, which exploit the routing in the wavelength domain inherently available in the switching components being used, are described.…”

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confidence: 99%

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Architectures and performance of awg-based optical switching nodes for ip networks

Bregni

Pattavina

Vegetti

2003

IEEE J. Select. Areas Commun.

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In order to support the continuous growth of transmission capacity demand, optical packet switching technology is emerging as a strong candidate, promising to allow fast dynamic allocation of WDM channels, combined with a high degree of statistical resource sharing. This work addresses the design of optical switch architectures, based on previous proposals available in the technical literature that use an arrayed waveguide grating (AWG) device to route packets. Since the port number of currently available AWGs is a limiting factor, we propose two new modified structures which better exploit the switching capability of this component in the wavelength domain.Since a limited hardware complexity is a key requirement for all-optical switches, due to the high cost of optical components, these different node configurations are compared in terms of complexity. Traffic performance of these new structures in a full optical packet switching scenario is also examined.

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Section: Performance Resultsmentioning

confidence: 99%

Section: B Fiber Delay Lines Unitmentioning

confidence: 99%

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confidence: 99%

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Architectures and performance of awg-based optical switching nodes for ip networks

Bregni

Pattavina

Vegetti

2003

IEEE J. Select. Areas Commun.

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“…The simplest switching matrix (Basic structure), first proposed in [1], is shown in figure 5, referred to a single plane. It consists of 2NG + R tunable wavelength converters and an AWG with size (NG + R) × (NG + R).…”

Section: Basic Structure (B)mentioning

confidence: 99%

“…In particular it considers the architecture of optical packet switching nodes already proposed in [1][2] [3], which exploit arrayed waveguide grating devices for packet routing and are equipped with fiber delay lines used either for input buffering or for shared buffering of optical packets. The paper is organized as follows.…”

Section: Introductionmentioning

confidence: 99%

Performance of optical packet switching nodes in IP transport networks

Aste

Pattavina

First International Conference on Broadband Networks

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Packet loss analysis in optical packet-switched networks with limited deflection routing

Szcześniak

Czachórski²,

Fourneau³

2008

Photon Netw Commun

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We present an approximate analytical method for the evaluation of packet loss probability in synchronous optical packet-switched networks which operate under limited deflection routing with the contention resolution method based on priorities. Packets are lost because they are removed by nodes. They are removed because they experience too many deflections and stay prohibitively long in the network. Such packets have to be removed because they will be ignored by the transmission protocols (like TCP) and because the quality of their optical signal is unacceptable. Presented are results for the network in the topology of the torus of the twodimensional grid, which operates at a steady state with the uniform load u, u ∈ 0, 1 . The strength of our analysis is its novel mathematical approach, which is capable of providing very low packet loss probabilities. For the network composed of 100 nodes, we predict the packet loss probability as low as 10 −9 or lower, while simulation provided results only at the order of 10 −6 . For a given permissible packet loss probability, our analysis provides the maximal network load and the number of allowed deflections. We verify the analysis with simulation in the cases for which simulation gave results.

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Optical Packet Switching of IP Traffic

Cited by 10 publications

References 9 publications

Architectures and performance of awg-based optical switching nodes for ip networks

Architectures and performance of awg-based optical switching nodes for ip networks

Performance of optical packet switching nodes in IP transport networks

Packet loss analysis in optical packet-switched networks with limited deflection routing

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