An active database framework for adaptive mobile data access

摘要

The ability to adapt to changes is among the most important issues in mobile information systems. We argue that active database system is the software architecture of choice as the foundation for adaptive mobile information services. We propose a modular framework and system architecture for building active mobile information systems by integrating off-the-shelf rule systems and database packages. For intelligent adaptation, a common mobile event interface is employed to detect the status changes. The rule system plays the role of a reactive component for making proper decisions in response to the changes. A general database interface ensures seamless integration of the rule system with any number of ODBC compliant database systems for flexible information access. We suggest implementation strategies and present performance results to demonstrate the feasibility of the proposed framework.