Nowadays, interaction with our surrouding environment has increased due to the presence of numerous devices that provide us with services. This is especially true in Smart Homes and can be of great help for the disabled people and the elderly that can no longer perform daily tasks they used to. However, in case of failure, corrective actions can be heavy to take, thus the need for the system to recover by itself and ensure service availability. Service availability is provided through service reconfiguration. This papers deals with service reconfiguration in smart homes. It presents a multi-level approach in which both off-line and on-line reconfiguration schemes are used to gradually recover from failed services. Static, effect-based, path and resource reconfiguration levels are described. They have been successfully implemented in the DANAH assistive system, which combines both navigation and service provision for smart homes.

International audienceIn this paper we present DANAH, an assistive system under development at the Lab-STICC laboratory at the European University of Brittany, in collaboration with the Kerpape center for functional reeducation and readaptation in Lorient. DANAH aims to be an almost all-in-one assistive system (ATS) which combines existing technologies to deliver suitable assistance for the disabled and the elderly. It focuses on both environmental control as well as navigation to help the physically impaired to perform everyday tasks and maintain a reasonable level of autonomy. Moreover, rapid prototyping methods have been introduced to speed up development, reduce costs and enforce ATS adoption

Abstract. Smart Homes are pervasive systems that interact with the user using a service offer paradigm to provide fully automated daily repetitive tasks. When services are augmented with semantic relationships, one can build adaptive services and systems. In this paper we deal with service failures and propose a recovering method, which we call service reconfiguration, to ensure service availability in smart homes. Both off-line and on-line reconfigurations are considered. This method has been implemented in the DANAH assistive system.