Ontological model of the functionality of personal Internet of things devices

The subject of the study is the problem of a formalized representation of the functionality of personal Internet of things devices operating as part of personal IoT networks. The object of the study is PIoT devices and their functionality, described in the context of the user’s personal IoT ecosystem. The work examines in detail the structure of the functionality of PIoT devices, their states, dependencies on the user, network and contextual environment, the need for a semantically consistent description of functions for management and interoperability purposes. Particular attention is paid to the shortcomings of existing approaches in which the functionality of devices is described either at the service level or in the form of unformalized lists of functions, which limits the possibilities of system analysis and the construction of universal control mechanisms. In this context, the research is aimed at creating a holistic model of the functionality of PIoT devices. The methodological basis of the study is the ontological approach. The ontology of functionality of PIoT devices is developed based on “METHONTOLOGY”, supplemented by a formal model of function states and restrictions. The main conclusions of the study are the rationale for the need for a formalized description of the functionality of PIoT devices and the demonstration that the proposed ontological and formal models provide a semantically consistent and strictly structured representation of functionality. The author's special contribution to the study of the topic is the formalization of the concept of functionality as a dynamic control object with stochastically changeable states and the development of an ontology that includes classes of devices, functions, policies, restrictions and states. The scientific novelty of the research lies in the fact that for the first time a formalized ontological model of the functionality of PIoT devices is proposed, supplemented by a formal model of functional states, which allows describing the structure of device capabilities and their dynamics depending on the operating context. The results obtained create the basis for the development of adaptive, intelligent and secure mechanisms for managing personal Internet of Things devices.