Abstract
In this paper, we present the idea that large-scale ambient intelligence takes the vision of anytime-anywhere to anytime-anywhere-anything (A3). Based on this vision, we argue that a mix of computing, communication and interface technologies remains limited in providing seamless access to services if the data and services from various autonomously operating entities remain non-sharable. Thus, we propose a sensor grid infrastructure that forms the key resource sharing backbone and provides secure access to valuable sensor, computational, data, and storage resources for supporting large-scale ambient intelligence.