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Speaker:        Shun Yao
                University of California, Davis

Topic:          "Contention resolutions in optical packet switching"

Date:           Monday, 5 November 2001

Time:           4:00pm - 5:00pm

Venue:          Lecture Theater F
                (Leung Yat Sing Lecture Theater, near lift nos. 25/26)
                The Hong Kong University of Science & Technology

ABSTRACT:

Consider a multi-wavelength optical network with an arbitrary mesh
topology where nodes perform optical packet switching. When two or more
packets attempt to leave a node on the same output port, on the same
wavelength, at the same time, then contention occurs. Contention can be
resolved by time buffering, wavelength conversion, or space deflection. We
provide a unified study of a network of optical routers, which include
contention resolutions in all three (time, wavelength, and space)
dimensions. Specifically, we show (1) how to accommodate all three
dimensions of contention resolution in an integrated optical router, (2)
how the performance of the three dimensions compare with one another, (3)
how various combined schemes (incorporating more than one dimension) can
be architected and how they perform. Furthermore, we propose an
electrical-optical hybrid contention-resolution scheme that can further
improve the network performance.



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Biography:

Shun Yao received B.E. in Electrical Engineering from Tsinghua University,
Beijing, P. R. China, in 1997. He joined University of California, Davis
in 1999 and is currently pursuing a Ph.D. He has been working closely with
Nokia Research Center on optical packet switching. His research interests
include optical packet switching, control and management for optical
networks, GMPLS, and next-generation Internet.



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