ExScal: Extreme Scale Wireless Sensor Networking, December 2004
The DARPA extreme scale project, codenamed "ExScal", covered an area 1.3km by 300m with about 1000 sensor nodes and around
200 backbone nodes making it the largest wireless sensor network assembled to
date. ExScal's demonstration is also the largest ad hoc 802.11 network thus far
created. the ExScal project has provided us with a rich set of experiences and
has given us a visceral understanding of the "real" problems that are
posed by networks of extreme scale.
ExScal Deployment
ExScal Topology
I was responsible for developing the
classification and tracking subsystem for this project. The subsystem includes
outlier detection and health monitoring. The classification and tracking that
is based on influence regions of the multi-modal sensors, is inhibited by the
presence of an unreliable network. I was involved in integrating the
communication chain for the multi-tiered network architecture. I was also
involved in identifying the types and characteristics of faults that occur in
ExScal and analyzing their impact on the performance of ExScal.
Publications
1. OSU NEST Team, ExScal: Elements
of an Extreme Scale Wireless Sensor Network , 11th
2. Sandip Bapat, Vinodkrishnan Kulathumani,
Anish Arora, Analyzing the YIELD of ExScal, a Large Scale
Wireless Sensor Network Experiment, IPSN 2005