Automatic Generation and Connection of Program Components based on RDF Sensor Description in Network Middleware

This paper describes automatic generation and linking mechanism of sensor processing components, which are called sensor services, in network middleware for distributed sensors in a room. This mechanism reduces deployment process in the creation of applications for real sensorized environments. The mechanism consists of 1) dynamic program duplication triggered by matching generation condition with descriptions of components and 2) sensor data selection based on selection conditions and the descriptions. The description, which is called RDF sensor description, is written in resource description framework (RDF) for definition of sensor properties including the knowledge about sensor-attached object. The conditions for RDF sensor description are scripted flexibly with vocabulary of abstract sensor knowledge. Through the conditions, the components are generated dynamically according to change of the sensor composition. The generated components can select needed sensor data in multiple sensor environment. We create sensor services that detect certain behaviors from raw sensor data in our sensing room. The services show generation mechanism´s independency on configurations of sensors in deployment of the components in the middleware