Definition and Implementation of Context Information

Abstract – Nowadays, many applications benefit from pervasive and ubiquitous computing. New services can be developed and offered. An important feature is the attempt to adapt ser-vices individually to the user. These services are called context-sensitive services, because they consider the context of the user and of his equipment. Although there are many projects that claim to be context-sensitive, a general definition for term context and a generalized specifica-tion technique for such information cannot be found there. This paper closes this gap and dis-cusses a general definition of the term context for any context-sensitive telecommunication ap-plication. Furthermore, it will be described which context information are relevant for context-sensitive applications, which is illustrated by an ongoing project.