Towards scenario creation by service composition in ubiquitous environments

Ubiquitous computing provides a large access to different functionalities through electronic devices; however these devices are not always thought to function in a set. This limits their use. Scenario creation by service composition makes it possible for end-users to specify their needs more precisely. In Service-Oriented Computing, some frameworks (such as OSGi) provide mechanisms to develop components that provide services; however they are not adapted to end-users and limited for service composition. This is why we developed a new user-centric system. Placed into an appropriate user electronic device, it discovers the available services around him and orders them to provide a better access through a GUI. Users can thus compose services to create a scenario thanks to a graphic adaptation of our ADL. Once created, this scenario can be registered and shared among users. A prototype (still in development) implements our system and demonstrates its feasibility. It can be improved by adding some recovery strategies.