Journal
PERVASIVE AND MOBILE COMPUTING
Volume 4, Issue 2, Pages 216-253Publisher
ELSEVIER
DOI: 10.1016/j.pmcj.2007.10.001
Keywords
Context-aware computing; Pervasive computing; Data-centric middleware; Smart environments; Emergency response
Funding
- Cisco Systems University Research Program
- Microsoft Research
- USENIX Scholars Program
- DARPA [F30602-98-2-0107]
- DoD MURI [F49620-97-1-03821]
- U.S. Department of Homeland Security, Science and Technology Directorate [2000-DT-CX-K001]
- U.S. Department of Justice, Bureau of Justice Assistance [2005-DD-BX-1091]
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The complexity of developing and deploying context-aware pervasive-computing applications calls for distributed software infrastructures that assist applications to collect, aggregate, and disseminate contextual data. In this paper, we motivate a data-centric design for such an infrastructure to support context-aware applications. Our middleware system, Solar, treats contextual data sources as stream publishers. The core of Solar is a scalable and self-organizing peer-to-peer overlay to support data-driven services. We describe how different services can be systematically integrated on top of the Solar overlay and evaluate the resource discovery and data-dissemination services. We also discuss our experience and lessons learned when using Solar to support several implemented scenarios. We conclude that a data-centric infrastructure is necessary to facilitate both the development and deployment of context-aware pervasive-computing applications. (C) 2007 Elsevier B.V. All rights reserved.
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