Multimedia Wireless Sensor Networks - LCN

Quality-Aware Context Sensing
‣ Automated determination of context
– We assume an underlying set of sensor data streams that can
be aggregated into context data
‣ Estimation problem over multiple sensor data streams
– Compute the best set of sensors + associated tolerance values
– Satisfy a target quality
– Minimize the cost of sensing
‣ Tolerance range
– Measured in terms of a sensor’s s data reporting frequency
– Ensure acceptable accuracy of the derived context
‣ Sensing Cost
– Measured in terms of communication overhead (energy cost)