Query Aggregation in Wireless Sensor Networks

Wireless sensor networks have been used more and more widely with the developments of related techniques in telecommunication and computer sciences. While sensor nodes in wireless sensor networks have very limited memory spaces and power. In this paper, the authors propose a new query aggregation method to preprocess the query predicates. The size of the relational table can be further reduced using the aggregated query predicates. The reduced relational table can be stored on the sensor nodes. This may cause false positive but definitely no false negative. When the required data are sent back to the sink, they can do join operation between the real query predicate and the relational table again, and eliminate the redundant data.