Accession Number:

ADA461190

Title:

An Integrated Contextual Information Service for Pervasive Computing Applications

Descriptive Note:

Technical rept.

Corporate Author:

DEFENSE CONTRACT AUDIT AGENCY FORT BELVOIR VA

Personal Author(s):

Report Date:

2003-01-01

Pagination or Media Count:

26.0

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 users current environment.

Subject Categories:

  • Computer Programming and Software
  • Computer Systems
  • Human Factors Engineering and Man Machine Systems
  • Telemetry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE