An evaluation of transaction management issues in mobile real-time database systems

The integration of issues from real-time database systems and mobile computing systems is a new research area that aims to provide support for real-time requirements of database applications in a mobile computing environment. Due to certain constraints of a mobile computing environment, such as resource-poor mobile computers, low-bandwidth and unreliable wireless links, and mobility of users/computers, various research issues in traditional real-time database systems need to be reconsidered. In this thesis, we investigate some of these issues using a detailed simulation model of a mobile real-time database management system. We propose a transaction execution model with two alternative execution strategies and evaluate the performance of the system considering various mobile system characteristics. Performance results are provided in terms of the fraction of transaction that satisfy their deadlines.