Architectures and Buffering for All-Optical Packet-Switched Cross-Connects |
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Authors: | R Geldenhuys Y Liu M T Hill G D Khoe F W Leuschner H J S Dorren |
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Affiliation: | (1) Department of Electrical, Electronic and Computer Engineering, University of Pretoria, Pretoria 0002, South Africa |
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Abstract: | This paper considers the performance of an all-optical 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 self-similar 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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Keywords: | All-optical buffering All-optical packet switch Optical signal processing |
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