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Speaker:        Vinod Vokkarane
                Department of Computer Science
                University of Texas at Dallas

Topic;          "Quality-of-Service in Optical Burst-Switched Networks"

Date:           Monday, 25 November 2002

Time:           4:00 pm - 5:00pm

Venue:          Lecture Theater F
                (Leung Yat Sing Lecture Theater, near lift nos. 25/26)
                HKUST


ABSTRACT:

Next-generation high-speed Internet backbone networks will be required to
support a broad range of emerging applications which may not only require
significant bandwidth, but may also have strict quality of service (QoS)
requirements with respect to end-to-end delays and integrity of
transmitted data.

Wavelength-division multiplexing (WDM) systems have the potential to
provide over 1 Tbps of capacity over a single fiber link.  Such systems
have been deployed in many wide-area networks in recent years to meet the
growing demand for bandwidth, and these systems are expected to be
deployed soon in metropolitan and access networks.  While current WDM
systems are point-to-point, requiring the conversion of signals to
electronics at each intermediate node, emerging WDM systems may employ
all-optical cross connects which will allow the establishment of
all-optical wavelength-routed paths.  These all-optical paths will be
capable of providing large amounts of bandwidth; however, the paths are
also likely to be fairly static and may not be suitable for handling
bursty traffic.

A more flexible alternative to wavelength routing, which may be more
suitable for handling bursty Internet traffic is optical burst switching.
In optical burst switching, bursts of data are transmitted all-optically
from source to destination. Optical burst switching is typically
connectionless, with resources being reserved by a control message, which
precedes the burst as it travels through the network.  If optical burst
switched networks are to be successfully deployed, they will need to be
capable of providing a wide range of differentiated services to satisfy
the QoS requirements of end-user applications.  Furthermore, nodes at the
edge of the network will need to be aware of the services provided by the
optical burst-switched core in order to successfully map QoS requirements
to specific services.

This research talk will involve the investigation of approaches for
supporting QoS requirements in optical burst-switched networks.  The talk
will provide a brief introduction to optical burst switching and describe
our proposed integrated QoS approach using Prioritized Burst Segmentation
and Composite Burst Assembly.



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Biography:

Vinod M. Vokkarane received the bachelor's degree in Computer Science and
Engineering from the University of Mysore, India in 1999, the M.S. degree
in Computer Science from the University of Texas, Dallas in 2001. He is
currently pursuing his PhD degree in Computer Science at the University of
Texas at Dallas, where he is currently a Research Assistant of the
Computer Science Department and a member of Advanced Network Research Lab.
He has published many papers in IEEE and SPIE conferences and magazines.
He has also served as a reviewer on many IEEE and SPIE journals,
magazines, and conferences.  His active area of research is in the area of
optical networks, focusing on the design and analysis of optical burst
switched network architectures and protocols.


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