Integration of Heterogeneous Sensor Nodes by Data Stream Management

In this paper, we present DSAM, a data stream application manager. DSAM supports the deployment of global queries to distributed and heterogeneous sensor nodes and stream processing systems (SPSs). We provide a graph-based global query language DSAM-AQL. The abstract query language (AQL) is a declarative streamoriented query language that abstracts from topology and distribution of wireless sensor networks (WSNs) and the heterogeneity of their nodes. Query processing and distribution is supported by a central catalog that manages all stream schemas, nodes, (initial) topology, SPSs, queries, performance characteristics of both network connections and nodes, and expressiveness of nodes´ supported query languages and query definitions. DSAM supports query partitioning, query mapping, deployment, and monitoring of distributed data stream applications. We focus on DSAM´s infrastructure and the procedures of deployment of global queries.