CAS/sup 2/: context awareness service system based on wireless sensor networks

In recent years, the appearance of ubiquitous computing provides a fair opportunity to access diverse information and service at anyplace, anytime for users. Furthermore, those services need system architecture and context-aware and, furthermore, location-aware technologies are essential. In this paper, we suggest that a system architecture (CAS²) for handling context information based on wireless sensor network (WSN) that can provide diverse and convenient services to user with only minimum actions by collecting context information of the user in real-time. CAS also provides optimized services to each user based on the context information