Consistency of sensor data in presence of updates

Abstract

With the emergence of more and more intelligent, autonomous, small and cheap sensors, sensor-based applications become very popular in various domains, e.g., industrial, domestic, medical, environmental and military. Sensor data management has become a very actif research domain. However, existing research has principally focused on querying of sensor data. Their "updates" are little explored in this context. The updates concern for instance modification of properties, reconfigurations or firmware updates. These operations are necessary for remote management of sensors by their providers. However, updates may may invalidate the results of the concurrently executing continuous queries. This article studies the sensor updates and their impact on the coherency of query results.