On the importance of time synchronization for context aware applications

Beschreibung

In context-awareness, sensors in the vicinity of the user are utilized to infer a user‘s situation. There is no single sensor that is able to correctly and completely access a user‘s situation, context awareness is always dependent on a multitude of sensor information to be aggregated to at least estimate a user‘s situation. It cannot be safely assumed that the clocks of all these sensor devices are accurately synchronized. In this book - we discuss the issues related to time synchronization in context aware applications, - analyze known time synchronization approaches and their applicability in context aware applications, - analyze and evaluate the reasons that cause time differences between devices, - evaluate common reasoning algorithms for their susceptibility to time synchronization related decreases of reasoning accuracy, - propose a conceptual approach to cope with the time synchronization issues along with a new architecture for context awareness, - and propose to incorporate time synchronization information into Quality of Context.

Autor*in

Bernd Niklas Klein

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contexaware application sensor awareness time synchronization

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