Optical routing of asynchronous, variable length packets

Tancevski, L.; Yegnanarayanan, Siva; Castañón, Gerardo; Tamil, Lakshman S.; Masetti, F.; McDermott, T.C.

doi:10.1109/49.887927

Cited by 117 publications

(47 citation statements)

References 26 publications

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“…Consequently the output interval between two packets destined for the same output port becomes large, and this is called the void space. 13 As an example, Fig. 4 illustrates why and how the void space appears, as follows.…”

Section: Void Space Reduction Methodsmentioning

confidence: 99%

<title>Packet scheduling for WDM fiber delay line buffers in photonic packet switches</title>

Yamaguchi

Murata

et al. 2002

SPIE Proceedings

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In this paper, we comparatively evaluate two photonic packet switch architectures with WDM-FDL buffers for synchronized variable length packets. The first one is an output buffer type switch, which stores packets in the FDL buffer attached to each output port. Another is a shared buffer type switch, which stores packets in the shared FDL buffer. The performance of a switch is greatly influenced by its architecture and the packet scheduling algorithm. We compare the performance of these two packet switches by applying different packet scheduling algorithms. Through simulation experiments, we show that each architecture has a parameter region for achieving a better performance. For the shared buffer type switch, we found that void space introduces unacceptable performance degradation when the traffic load is high. Accordingly, we propose a void space reduction method. Our simulation results show that our proposed method enables to the shared buffer type switch to outperform the output buffer type switch even under high traffic load conditions.

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Section: Void Space Reduction Methodsmentioning

confidence: 99%

<title>Packet scheduling for WDM fiber delay line buffers in photonic packet switches</title>

Yamaguchi

Murata

et al. 2002

SPIE Proceedings

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“…Although variable length packets can be handled in an asynchronous manner through techniques such as void filling described in Ref. [23], these techniques are very complex to implement, especially within the context of an all-optical implementation as assumed in this work. Because IP packets are variable length packets, this means that the edge routers will have to segment and reassemble packets, and perform grooming.…”

Section: Optical Switchingmentioning

confidence: 99%

Architectures and Buffering for All-Optical Packet-Switched Cross-Connects

et al. 2006

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This paper considers the performance of an alloptical packet-switched cross-connect. All-optical header processing and all-optical routing are implemented in the cross-connect architectures. The main metric considered to measure the performance is the packet loss ratio for the buffering. This is influenced primarily by three factors. The first is the cross-connect architecture: feedback or feed-forward buffering, incorporating wavelength domain contention resolution. The second is the selection of the fibre delay line distribution: degenerate or non-degenerate distributions. And the third is the traffic load together with the traffic model used for the performance analysis: a Poisson distribution or a selfsimilar model. It is shown that the optimal implementation of a feedback buffer requires a technique such as overflow buffering as well as the superior performance of an all-optical switch in order to maintain signal quality through multiple recirculations.

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“…Several heuristic connectionless-like WDS algorithms have been studied in the past, showing that they may significantly change the performance [4,5]. The price to pay for this performance improvement is a non-negligible processing effort.…”

Section: Congestion Resolution In the Ops Nodementioning

confidence: 99%

“…Deflection routing is the only congestion resolution scheme considered in [3], while here we focus on the combined use of time and wavelength, that have been shown to realize a good trade-off between network control complexity and performance [4,5].…”

Section: Introductionmentioning

confidence: 99%

A Framework for the Analysis of Delay Jitter in Optical Packet Switched Networks

Callegati

Cerroni

Muretto

et al. 2005

Optical Networks and Technologies

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Abstract:Out of order delivery and/or delay jitter are typical phenomena occurring in networks adopting a packet transfer mode and may have a relevant impact on the behavior of higher layer protocols. In this paper an original framework is proposed to analyze these phenomena in optical packet-switched networks that employ the wavelength and the time dimensions to solve congestion. This framework is the first step toward a deeper understanding of the interaction between transport networks and higher layers behaviors.

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Optical routing of asynchronous, variable length packets

Cited by 117 publications

References 26 publications

<title>Packet scheduling for WDM fiber delay line buffers in photonic packet switches</title>

<title>Packet scheduling for WDM fiber delay line buffers in photonic packet switches</title>

Architectures and Buffering for All-Optical Packet-Switched Cross-Connects

A Framework for the Analysis of Delay Jitter in Optical Packet Switched Networks

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