Query optimization for wireless sensor network databases in the MadWise system

We propose a comprehensive approach to distributed query processing in wireless sensor networks. In our proposal we reinterpret the classical approach to database system design according to the wireless sensor networks context, and we redefine the aspects related to the definition of a query language, data model, query algebra, and query optimization strategies. We show that our approach en- ables optimizations of the query plan which may reduce the costs, in terms of consumed energy, of orders of magnitude.