event detection and notification in the world-wide sensor web magdalena balazinska with evan...

Event Detection and Notification in the World-Wide Sensor Web

Magdalena Balazinska withEvan Welbourne, Garret Cole, Nodira Khoussainova, Julie Letchner,

Christopher Ré, Yang Li, Gaetano Borriello, and Dan Suciu

Computer Science & Engineering

University of Washington

http://rfid.cs.washington.edu/

RFID Ecosystem

Location trackingtag time location

… … …

Bob 10:02 B

A B C

Deployment

Bob 10:03 C

Bob 10:01 A

ReaderAntenna

Tag:

High-Level RFID Events

Our system: Cascadia

Applications

Standalone orTransformer

Event Specification: Scenic

Event Detection: PEEX

PeexL is translated into SQL SQL queries execute repeatedly Uses small, shifting time window

PEEXAt(…)

At(…)

At(…)

At(…)

At(…)

At(…)

At(…)

At(…)

At(…)

At(…)

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At(…)

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At(…)

At(…)

At(…)

At(…)

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SQL Event Queries Results

event person room time prob

Coffee Bob 481 5 .63Break

Coffee Bob 481 14 .86Break

Coffee Bob 481 16 .87Break

COFFEE-BREAK(Bob,481,5,.64)

Event Stream to Applications

COFFEE-BREAK(Bob,481,14,.86)COFFEE-BREAK(Bob,481,16,.87)<no events this window>

… … … … …

And so on…

Event Visualization: SensorMap

More Information

Cascadia: A System for Specifying, Detecting, and Managing RFID Events. E. Welbourne, N. Khoussainova, J. Letchner, Y. Li, M. Balazinska, G. Borriello, and D. Suciu. Mobisys 2008.

Specification, Detection, and Notification of RFID Events with Cascadia (demo). E. Welbourne, G. Cole, N. Khoussainova, J. Letchner, Y. Li, M. Balazinska, G. Borriello, and D. Suciu. Mobisys 2008.

Event Queries on Correlated Probabilistic Streams. C. Re, J. Letchner, M. Balazinska, and D. Suciu. SIGMOD 2008.

A Demonstration of Cascadia through a Digital Diary Application (demo). N. Khoussainova, E. Welbourne, M. Balazinska, G. Borriello, G. Cole, J. Letcnher, Y. Li, C. Re, D. Suciu, and Jordan Walke. SIGMOD 2008.

PEEX: Extracting Probabilistic Events from RFID Data. N. Khoussainova, M. Balazinska, and D. Suciu. ICDE 2008.

http://rfid.cs.washington.edu/publications.html

Event Detection and Notification in the World-Wide Sensor Web

Magdalena Balazinska withEvan Welbourne, Garret Cole, Nodira Khoussainova, Julie Letchner,

Christopher Ré, Yang Li, Gaetano Borriello, and Dan Suciu

Computer Science & Engineering

University of Washington

http://rfid.cs.washington.edu/