ORBIT-USER: FW: WINLAB EVENT: WINLAB Seminar ANNOUNCEMENT

[Ivan Seskar]

-----Original Message-----

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Event:		WINLAB Seminar
Time:		Monday, July 17, 2006, 1:00 PM
Location:	WINLAB Route 1 Tech Center 
		North Brunswick
		Conference room D-104

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    Multi-Radio 802.11 Mesh Wireless Networks

                            Prof. Sumit Roy
 	      University of Washington                                  


                               ABSTRACT:

Designing an appropriate Broadband Wireless Access Network (BWAN) for
client access to a backbone network (the Internet) continues to be an
ongoing challenge (the so-called first/last mile problem). In this
context, the talk will describe the renewed interest in MESH or multihop
networks whereby data to and from users reach the wired backbone via
multiple wireless hops. Currently, MESH network architectures based on
emergent next generation high-rate standards (IEEE groups 802.11, 802.15
and 802.16) that embody different link
(PHY) and data-link (MAC) layer designs are under active consideration.
Successful deployment of such networks is predicated on achieving
requisite design goals of network scalability as a function of
increasing node density and increasing user data rates, while using an
architecture where a majority of nodes are (cheap) routers. 

The talk will first provide an overview of mesh networking architecture
and associated concepts. The role of joint optimization across Layers
1-3 of the protocol stack to optimize aggregate network throughput/delay
characteristics and consequent trade-offs is highlighted by two
important contributions from our own research - 

  i. the impact of physical carrier sensing on improving aggregate
throughput in lieu of RTS/CTS based virtual carrier sensing, and 
 
 ii. the potential of a mesh based on multi-radio nodes that allows
considerable new degrees of freedom for intelligent channel assignment. 

                               BIOGRAPHY:

Sumit Roy received the B. Tech. degree from the Indian Institute of
Technology (Kanpur) in 1983, and the M. S. and Ph. D. degrees from the
University of California (Santa Barbara),all in Electrical Engineering
in 1985 and 1988 respectively, as well as an M. A. in Statistics and
Applied Probability in 1988. His previous academic appointments were at
the University of Pennsylvania, and at the University of Texas, San
Antonio. Presently he is Professor and Associate Chair of Electrical
Engineering, Univ. of Washington where his research interests include
analysis/design of communication systems/networks, with a topical
emphasis on next generation mobile/wireless networks. He spent 2001-03
on academic leave at Intel Wireless Technology Lab working on
ultra-wideband radios for high-speed wireless access as well as design
considerations for next generation WLANs. His activities for the IEEE
Communications Society includes membership of several technical and
conference program committees; he has served as Editor for the IEEE
Trans. on Communications and IEEE Trans. on Wireless Communications and
currently serves on the Editorial Board for Wiley J. Wireless
Communications and Mobile Computing.

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Note:
This event can be viewed in real time by pointing your Windows Media
Player (not your browser) at the time of the talk to:

                        http://165.230.132.111;

Its recording will be archived for off-line viewing 24 hours after the
presentation at:

                http://www.winlab.rutgers.edu/pub/events

 (Please check the links at the bottom of the seminar abstract page).