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Proceedings Paper

Optical packet switch architectures for ultrahigh-speed networks
Author(s): M. J. O'Mahony; Dimitris Klonidis; Christina Politi; Reza Negabati; Dimitra Simeonidou
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Paper Abstract

Optical packet switching is commonly considered as a possible technology for future telecommunication networks, due to its compatibility with bursty traffic, eg Internet protocol (IP), and efficient use of wavelength channels. Current transport networks are voice-optimised and connection oriented, however the amount of data traffic is rapidly increasing, resulting in a continuous increase of average traffic through major exchanges exceeding 30% per annum (in Europe). Thus optical packet switching is seen as a future technology that will support diverse traffic profiles and give more efficient bandwidth utilisation through its ability to provide multiplexing at the packet level. In recent years the significance of optical packet switching as an emerging technology has been identified and researched by a number of research groups. Earlier optical packet switching demonstrators presented switching of mainly ATM compatible synchronously transmitted packets at bit rates up to 2.5b/s with the optical header encoded either in series or in parallel to the payload using the sub-carrier modulation technique. More recent projects have demonstrated switching capabilities at 10Gb/s using more advanced approaches with special encoding schemes for header and header detection, together with sophisticated control mechanisms for contention resolution. The capability of switching optical packets at bit rates up to 160Gb/s has recently been demonstrated. This paper discusses the architectures currently proposed for high speed optical packet switching, including the key techniques of header processing and payload switching. The focus is on a high speed demonstrator [OPSnet] capable of operation at rates >100 Gb/s.

Paper Details

Date Published: 8 December 2005
PDF: 9 pages
Proc. SPIE 6021, Optical Transmission, Switching, and Subsystems III, 602102 (8 December 2005); doi: 10.1117/12.636491
Show Author Affiliations
M. J. O'Mahony, Univ. of Essex (United Kingdom)
Dimitris Klonidis, Athens Information Technology (Greece)
Christina Politi, National Technical Univ. of Athens (Greece)
Reza Negabati, Univ. of Essex (United Kingdom)
Dimitra Simeonidou, Univ. of Essex (United Kingdom)

Published in SPIE Proceedings Vol. 6021:
Optical Transmission, Switching, and Subsystems III
Rodney S. Tucker; Dominique Chiaroni; Wanyi Gu; Ken-ichi Kitayama, Editor(s)

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