Semantic based events signaling for AAL systems

The synergistic cooperation of a set of different devices is still one of the major open issues in designing the new generation of collaborative AAL system. To contribute to fill this gap, this paper introduces Semantic Events Notifier (SEN), a lightweight prototype of semanticbased and agent-oriented middleware that aims to provide near real-time events notification among all the enabled devices of an AAL system. The idea behind this research work goes in the direction to find scalable technological solution to answer the continued growth of objects connected to the IoT network, in particular, within the domestic environment. SEN enables the involved Smart Objects to cooperate synergistically based on a shared semantic model, thus contributing to support various tailored services that assist elderly users or users with disabilities for a better and healthier life in their preferred living environment. Moreover, a prototype of the platform has been implemented and validated to prove the correctness of the approach. Finally, the evaluation of its quality of service requirements in terms of latency, efficiency, and scalability has been conducted in a real case study by means of a defined benchmark.