A Formal Characterization of Vagueness and Granularity for Context-Aware Mobile and Ubiquitous Computing
نویسندگان
چکیده
In this article, a formal approach for modeling central concepts of context-awareness in ubiquitous and mobile computing is introduced. The focus is on an appropriate handling of issues of vagueness and granularity in ubiquitous computing environments. A formalization of perceptual and sensory uncertainty and a characterization of granularity are applied for modeling three central aspects of context-awareness: context as retrieved from sensors, context for representing relevance, and context as unfocussed background information. The notions are developed and demonstrated with respect to the special case of spatial contexts, but are sufficiently general to also cover other types of context. Use of the characterized concepts is motivated with an example of ongoing work on ontology design for ubiquitous computing environments.
منابع مشابه
A context-sensitive dynamic role-based access control model for pervasive computing environments
Resources and services are accessible in pervasive computing environments from anywhere and at any time. Also, due to ever-changing nature of such environments, the identity of users is unknown. However, users must be able to access the required resources based on their contexts. These and other similar complexities necessitate dynamic and context-aware access control models for such environmen...
متن کاملCAMAC: a context-aware mandatory access control model
Mandatory access control models have traditionally been employed as a robust security mechanism in multilevel security environments such as military domains. In traditional mandatory models, the security classes associated with entities are context-insensitive. However, context-sensitivity of security classes and flexibility of access control mechanisms may be required especially in pervasive c...
متن کاملA semantic-aware role-based access control model for pervasive computing environments
Access control in open and dynamic Pervasive Computing Environments (PCEs) is a very complex mechanism and encompasses various new requirements. In fact, in such environments, context information should be used in access control decision process; however, it is not applicable to gather all context information completely and accurately all the time. Thus, a suitable access control model for PCEs...
متن کاملAn Ontology Oriented Architecture for Context Aware Services Adaptation
In the field of ubiquitous computing, a class of applications called context-aware services attracted great interest especially since the emergence of wireless technologies and mobile devices. Contextaware application can dynamically capture a range of information from its environment and this information represents a context, the application adapts its execution according to this context. An i...
متن کاملDesigning Tools for Context-aware Adaptive Mobile Learning
During the past years, ubiquitous computing has influenced Technology-enhanced Learning. This is widely known as ubiquitous learning. On the other hand, the widespread ownership of mobile devices has lead to an increased interest to ubiquitous learning that is supported by mobile devices. This is commonly referred to as mobile learning. An important success factor for ubiquitous and mobile lear...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2006