Fuzzy-assisted event-based kNN query processing in sensor networks

Abstract

This paper proposes a novel event-based k-Nearest Neighbor (kNN) query processing framework using fuzzy sets for distributed sensor systems. Our key technique is that linguistic e-kNN event information instead of raw sensory data is used for e-kNN information storage and in-networks kNN query processing, which is very beneficial to energy efficiency. In addition, event confidence based grid storage method and e-kNN query processing algorithm are devised for e-kNN information storage and retrieval respectively. The experimental evaluation based on real data set show promising results when compared with other methods in the literature.