Abstract EN:

An important aspect of ambient computing is to link information systems with the real world. To this end, sensors and networks of sensors play an important role in providing data and events from the real world. Surprisingly, much less attention has been paid to what is becoming the most important sensor network ever deployed: the multimedia phone. While these are well-known as personal messaging devices, their role as sensors has been largely ignored. These devices can capture sound, pictures and video, and can communicate with global as well as local networks. Users can now produce, exchange and consult, data anytime, anywhere. This thesis presents a new application of these technologies: collaborative capture, where the shared data is no longer resources hosted in the network, but structured information composed of elements contributed dynamically by a collection of nodes. Consider, for example, someone arriving late in a meeting. Many phones, treated as audio capture devices, could have recorded the beginning of the meeting to allow the newcomer to catch up with the missing part. Our proposal is articulated according to four axes. First, we present a protocol to share resources over Bluetooth communications. Second, we propose some policies to cluster produced data. Then, we propose a protocol to synchronize distributed captured medias. Finally, we present a collaborative capture of data from the Internet.