Building Policy-Based Context Aware Applications for Mobile Environments

摘要

Advances in portable devices and wireless technology eased the seamless service provisioning to mobile users in pervasive environments. However, the limited capabilities of portable devices, network heterogeneity, and the spontaneous interactions due to users and devices mobility placed significant burdens on applications deployed in these environments. This paper describes an innovative approach for supporting mobile users with context-aware services wherever they go and with whatever devices they use. This approach is based on a novel framework that provides necessary features and services to facilitate building context-aware mobile applications. The framework uses semantically modeled policies to adapt the application behavior dynamically based on the situation of its users. The framework negotiates contexts and sets levels of agreements needed to translate automatically these contexts to a set of semantic policies.