Abstract
If we are to deploy sensor applications in a realistic business context, we must provide innovative middleware services to control and enforce required system behavior; in order to correctly interpret collected temperature data, for example, sensor applications require guarantees about minimal coverage and the number of available sensors. The extreme dynamism, scale and unreliability of wireless sensor networks represent major challenges in contemporary software management. This paper presents QARI, a middleware service for decentralized and quality aware software deployment, which offers a simple yet flexible way to define, enforce, and maintain software deployment specifications. We have evaluated QARI on the LooCI component model and the SunSPOT platform; results confirm that QARI enables quality aware software deployment for a single as well as multiple applications, and even in the presence of node failure and mobility.
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