Handling updates for real-time transaction processing in broadcast disks environment

In broadcast disks environment, conventional concurrency control mechanisms are not applicable because of asymmetric communication bandwidth between the server and mobile clients. Moreover, most of applications in broadcast disks environment require real-time processing. In this paper, we propose a new concurrency control algorithm that can not only exploit the feature of broadcast disks environment but also acquire the correctness and the urgency of transactions. The algorithm allows the mobile client to validate and commit locally the read-only transactions. Furthermore, it can make the clients early detect the data conflict of update client transactions that would be happened at the server. These desirable features help client transactions to meet their deadlines.