Integrating local services and applications into external user home environments

Users moving between different ubiquitous computing environments should be able to take a full profit of the resources existent there, if their home environment (e.g. a mobile portal) could seamlessly integrate with local infrastructure. Pursuing such goal, this paper focuses on the aspects of integrating local applications and services into an external user home environment, with particular emphasis on the interoperability and performance issues. Based on the concept of Value ADded Environment (VADE), as an administrative and physical domain, where the locally available facilities can be combined with external user home environments, the paper presents a middleware solution supporting the integration of local services and applications available in VADE environments into an external portal.