Context Service Framework for the Mobile Internet

Many context aware systems have been developed especially for mobile devices, where proximity to users allows for collecting more reliable context data. However, many solutions suffer from lack of interoperability, complexity and adoption difficulties. We describe a complete framework for context provision for mobile Web applications that is based on technologies that have already been deployed as well as endorsed by standardization bodies. Our framework includes as the main parts a context representation model that is an extension of an ongoing standardization activity within World Wide Web Consortium (W3C) called delivery context interfaces (DCI) targeted to consumer Web applications, and a SIP-event based framework for context data provisioning. We further provide a proof-of-concept implementation of individual components along with application scenarios utilizing our proposed framework and our ongoing integration efforts for combining the two main framework parts