Abstract
In smart spaces such as smart homes, computation is embedded everywhere: in toys, appliances, or the
home’s infrastructure. Most of these devices provide a pool of available resources which the user can take
advantage, interacting and creating a friendly environment. The inherent composability of these systems
and other unique characteristics such as low-cost energy, simplicity in module programming, and even
their small size, make them a suitable candidate for dynamic and adaptive ambient systems. This research
work focuses on what is defined as an “ambience”, a space with a user-defined set of computational
devices. A smart-home is modeled as a collection of ambiences, where every ambience is capable of
providing a pool of available resources to the user. In turn, the user is supposed to carry one or several
personal devices able to interact with the ambiences, taking advantage of his inherent mobility. In this way,
the whole system can benefit from resources discovered in the spatial proximity. A software architecture is
designed, which is based on the implementation of low-cost algorithms able to detect and update the system
when changes in an ambience occur. Ambience middleware implementation works in a wide range of
architectures and OSs, while showing a negligible overhead in the time to perform the basic output
operations.
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