[Fwd: [Seattle-seminars] NEW SEMINAR - Intel Research Seminar Announcement]

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From: Seminar Annoucements from Intel Research Seattle
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Subject: [Seattle-seminars] NEW SEMINAR - Intel Research Seminar Announcement
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Intel Research Seattle Seminar Announcements
Building fault tolerant large scale distributed wireless systems

Anmol Sheth

http://www.colorado.edu/

University of Colorado

Monday, Dec 11, 2006

10:00 - 11:30 Pacific Time

Intel Research Seattle
1100 NE 45th Street
6th Floor
Seattle, WA 98105

ABSTRACT:
The reduction in cost and ease of installation of 802.11 based wireless
LAN (WLAN) hardware has resulted in a surge of large scale deployments.
Furthermore, with the flexibility of open source WLAN device drivers,
there is growing interest to extend the basic WLAN technology to outdoor
environments. Recent efforts have looked at extending WLANs to outdoor
long distance networks, urban mesh networks, and interfacing with smart
antennas. However, due to the unreliable nature of wireless links and
chaotic deployments, users of such networks frequently encounter
degraded performance and lack of coverage. Existing approaches that aim
to diagnose these problems are inefficient because they troubleshoot at
too high a level, and are unable to distinguish among the root causes of
performance degradation. In this talk I shall outline some of the
commonly observed performance anomalies in such networks. I shall
discuss the design and implementation of fine-grained detection
algorithms that are capable of distinguishing between root causes of
wireless anomalies at the depth of the physical layer using stock WLAN
hardware. Unlike the stock 802.11 protocol, which always resorts to rate
fallback as a remedy, diagnosis of the root cause helps in applying
additional efficient remedies to mitigate the fault. An important
property that emerges from our system is that diagnostic observations
are combined from multiple sources over multiple time instances for
improved accuracy and efficiency. 

BIO:
Anmol Sheth is a doctoral candidate in Computer Science department at
the University of Colorado at Boulder. He received his B.S. in Computer
Science from the University of Pune, India in 2001. His research focuses
towards building and deploying real world large scale distributed
wireless systems. His research interests include developing low-cost
wireless technology for emerging regions, software defined radios,
network measurements and analysis, and fault tolerant distributed
systems. He is also an active member of the MANTIS sensor network
operating system group at the University of Colorado, Boulder.
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