Abstract
Sensor data abstraction is necessary to provide users with context-aware services. Sensor data abstraction mechanism in context-aware system usually consists of collecting data, converting, and context reasoning. For this mechanism in IoT environments, sensor data is used that is described in the pairs of key-value set or digit value. However, environmental data cannot be sufficiently formed since these sensors data are provided with these values. For example, it may need metadata of contexts and things description. In this paper, we propose a new conceptual metadata model for sensor data abstraction in IoT environments. The proposed model provides sensor data and their metadata as low-level context, which is a part of basic context for presenting given environment, to context-aware system. In the experiments, we describe a procedure to generate low-level context for sensor data abstraction based on the proposed model and to provide this information to the context-aware system.
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