A model for context awareness in Ubicomp

• João Lopes UFRGS
• Rodrigo Souza UFRGS
• Cláudio Geyer UFRGS
• Cristiano Costa UNISINOS
• Jorge Barbosa UNISINOS
• Márcia Gusmão UFPEL
• Adenauer Yamin UFPEL

Resumo

In this paper we present a view of EXEHDA middleware and a novel service created for dynamic adaptation. EXEHDA is service-oriented, adaptive and was conceived to support the execution of ubiquitous applications. The main concept in the proposed design for the middleware and for the application is context awareness expressed in an adaptive behavior. The middleware manages and implements the follow-me semantics for ubiquitous applications. This is also a key to provide functionality adapted to the constraints and unpredictability of the large-scale environment. EXEHDA provides services for distributed adaptive execution, context recognition, ubiquitous storage and access, and anonymous and asynchronous communications. To evaluate the proposed service we developed a case study, implementing an application in medical area. Analyzing the results we can see that the users found the application easy to use and usefulness for health workers at a hospital.