An Ontology-Based Approach to Context Modeling and Reasoning in Pervasive Computing

Abstract

-A growing interest for pervasive applications and an increasing diversity of pervasive computing devices integrated in our surroundings demand incorporating context-awareness in such applications in order to protect users from being disturbed by such services while on their regular duty. The behavior of these applications should depend not only on their internal state and user interactions but also on the context sensed during their execution. Context and context awareness, therefore, are the key components of pervasive computing so as to perform tasks on behalf of users. In this paper, we propose ontology based reusable context model. The model facilitates the context reasoning by providing structure for contexts, rules and their semantics. Initial prototype of the use of the model in a multi-domain platform is created and the result obtained is promising.

Comparing and Choosing Appropriate Database for Storing Context in Context Aware System

“…For semantic interpretations, ontology is used along with relational database. The Table 1 shows the appropriateness of both approaches in relation to the necessary features (Vanathi and Uthariaraj 2011b;2011c;Ejigu et al, 2007;Codd, 1970;Hellerstein et al, 1995;Latip et al, 2011). Both approaches have strong and weak sides with respect to features for context management modelling.…”

“…Context acquisition layer gathers the context from the environment using sensors. Context representation layer represents context as entity relation hierarchy form (Ejigu et al, 2007). Set of entities for which context is to be captured is called as Entity.…”

Contextual Requirements for Mobile Native Applications

“…Context data represent instances of contexts. These are classified into various classes such as user context, device context, application contexts, network contexts, and resource context [6]. The rules represent derivation of axioms that are used by context aware systems to derive decisions and conclusions about the actions that follow.…”

“…User and role holds context information related to user and its activity [6]. The user context also determines the belief of a user that interacting with the mobile system will enhance its task that is termed as usefulness [20].…”

Formal Approaches to Modelling and Verifying Resource-bounded Agents-state of the Art and Future Prospects

“…In recent years much research in pervasive computing has been focused on incorporation of context-awareness features into pervasive applications. There is an extensive body of work in adapting the Semantic Web technologies to model context-aware systems [23][24][25]. In the pursuit of making context-aware system much more useful we need to make its various devises communicate with each other and with the surrounding environment in a cooperative manner.…”