Definition and Implementation of Context Information

Nowadays, many applications benefit from pervasive and ubiquitous computing. New services can be developed and offered. An important feature is the attempt to adapt services 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 specification technique for such information cannot be found there. This paper closes this gap and discusses a general definition of the term context for any context-sensitive telecommunication application. Furthermore, it will be described which context information are relevant for contextsensitive applications, which is illustrated by an ongoing project.