An Orientation Service for Dependent People Based on an Open Service Architecture

This article describes a service architecture for ambient assisted liv ing and in particular an orientation navigation service in open places for persons with memory problems such as those patients suffering from Alzheimer's in its early stages. The service has the following characteristics: one-day system autonomy; self-adjusting interfaces for simple interaction with patients, based on behavioural patterns to predict routes and destinations and to detect lost situations; easy browsing through simple spoken commands and use of photo graphs for reorientation, and independence of GISs (Geographic Information Systems) to reduce costs and increase accessibility. Initial testing results of the destination prediction algorithm are very positive. This system is integrated in a global e-health/e-care home service architecture platform (OSGi) that enables remote management of services and devices and seamless integration with other home service domains.