An Integrated Contextual Information Service for Pervasive Computing Applications
Abstract
Pervasive computing applications are increasingly leveraging contextual information from several sources to provide users with behavior appropriate to the environment in which they reside. If these sources of contextual information are used and deployed in an ad hoc manner, however, they may provide overlapping functionality, fail to provide needed functionality, and require the use of inconsistent interfaces by applications. To overcome these problems, we introduce a Contextual Information Service that provides applications with contextual information via a virtual database. Unlike previous efforts, our service provides applications a consistent, lightweight, and powerful mechanism for obtaining contextual information, and includes explicit support for the on demand computation of contextual information. We show, using a Contextual Information Service prototype and example applications that we have implemented, how this approach can be used by proactive applications to adapt their behavior to match a user's current environment.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 2003
- Accession Number
- ADA461190
Entities
People
- Glenn Judd
- Peter Steenkiste
Organizations
- Defense Contract Audit Agency