User-centric service environment for context aware service mash-up

The existing service mash-up environment enables user to create context aware services. It is able to build services by recombining ready-made building blocks and connection operations. But a non-technical user is difficult to create context aware service. Because, they don´t know principles of service offering (e.g., service platform architecture, concept of ontology, criteria of context, required sensor type and etc). To solve this problem, we propose the user-centric service environment. It consists of service mash-up process and the web-based service composition user interface. The user can create target context aware service through easily step-by-step progress. Also, we propose the ontology based semantic sensor data processing. It removes heterogeneity of sensor data and processes the object data to the context information.