Sensorless Sensing in Wireless Networks: Implementation and Measurements
Woyach, K.
Puccinelli, D.
Haenggi, M.
Network Communication and Information Processing Laboratory, Department of Electrical Engineering, University of Notre Dame, kwoyach@nd.edu
This paper appears in: Modeling and Optimization in Mobile, Ad Hoc and Wireless Networks, 2006 4th International Symposium on Publication Date: 03-06 April 2006
On page(s):
1
- 8
ISBN: 0-7803-9549-2
Current Version Published: 2006-08-07
Abstract
Multipath fading and shadowing are usually regarded as negative phenomena hindering proper radio communication. Adopting a completely different stance, this paper illustrates that such phenomena enable information harvesting from received signal strength leading to a number of original applications requiring no conventional sensing hardware. The radio itself, provided that it can measure the strength of the incoming signal, is the only sensor we use; with this sensor-less sensing approach, any wireless network becomes a sensor network. We show that motion of the nodes in the network or motion of bodies external to the network leaves a characteristic footprint on signal strength patterns, which may be exploited for motion detection. We illustrate a technique to extract an estimate of velocity from signal strength, and we leverage on the spatial memory properties of wireless links to present a method for spatial configuration recognition.
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