Meta Model Context Based Space for Ubiquitous Computing

Meta Model Context Based Space for Ubiquitous Computing

Mohammed Fethi Khalfi (Computer Science Department, University of Djilali Liabes, Sidi Bel Abbel, Algeria) and Sidi Mohamed Benslimane (Computer Science Department, University of Djilali Liabes, Sidi Bel Abbel, Algeria)
DOI: 10.4018/IJAPUC.2015040105
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Pervasive computing is a paradigm that focuses on the availability of computer resources anytime anywhere for any application and supports integration of computing services into everyday life. Context awareness is the core feature of pervasive computing. High-level context awareness can be enhanced by situation awareness that represents the ability to detect and reason about the real-life situations. In this paper, in order to deal with the problem in context-aware modeling in pervasive computing environments, the authors present a comprehensive and integrated approach for context modeling. They first propose a Meta model context based on ontology for Pervasive Computing aiming firstly to overcome the limitations of the existing ontologies, and secondly extend its capabilities by adding new environmental aspects. They divide the context model into Meta Ontology level and Domain-specific Ontology level according to the abstraction hierarchy. The Meta Ontology is the high abstract level which extracting the basic elements of the context knowledge. The Domain-specific Ontology is the lower abstract lever which focusing on different domains knowledge, directed by the Meta Ontology. The advantage is that it can provide a flexible modeling mechanism for multiple applications of context-aware pervasive computing. A case study of HealthCare domain is given to illustrate the practicality of the authors' Model.
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2. Dimension Of Pervasive Computing

Analyzing technologies of ubiquitous computing (Khalfi et Benslimane, 2013), we have identified the following three design dimensions (Figure 1).

Figure 1.

Dimension of pervasive computing


2.1. Wireless Networks

Wireless networks infrastructures can form the platform, which enable clients to transparently connect and share context with remote entities. The geographic scope defines the coverage capacity of a wireless network.

2.2. Wireless Sensor Networks (WSN)

These consist of a large number of tiny devices called sensor nodes that pervade an area and collaborate together to collect the information necessary to adjust system behavior, pervasive systems usually integrate wireless sensors, which consist of small devices capable of sensing, processing, and communicating different types of sensory data.

2.3. Pervasive Access Devices

These constitute the front end of pervasive environment and are likely to contain a multitude of different device types that differ in size, shape (more diverse, ergonomic, and stylistic), and functional diversity (mobile phones, laptops, pagers, PDAs). In essence, pervasive devices dictate the interaction between the user and the pervasive system. A major requirement for participation of a device in a pervasive environment is connectivity.

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