Communications of the ACM - Special issue on information filtering
Balancing push and pull for data broadcast
SIGMOD '97 Proceedings of the 1997 ACM SIGMOD international conference on Management of data
Efficient concurrency control for broadcast environments
SIGMOD '99 Proceedings of the 1999 ACM SIGMOD international conference on Management of data
Concurrency control in mobile distributed real-time database systems
Information Systems
IEEE Transactions on Computers
Data Allocation on Wireless Broadcast Channels for Efficient Query Processing
IEEE Transactions on Computers
Data on Air: Organization and Access
IEEE Transactions on Knowledge and Data Engineering
Adaptive Broadcast Protocols to Support Power Conservant Retrieval by Mobile Users
ICDE '97 Proceedings of the Thirteenth International Conference on Data Engineering
Exploiting Versions for Handling Updates in Broadcast Disks
VLDB '99 Proceedings of the 25th International Conference on Very Large Data Bases
Disseminating Updates on Broadcast Disks
VLDB '96 Proceedings of the 22th International Conference on Very Large Data Bases
Real-Time Transaction Management in Mobile Computing Systems
DASFAA '99 Proceedings of the Sixth International Conference on Database Systems for Advanced Applications
Broadcast on Demand: Efficient and Timely Dissemination of Data in Mobile Environments
RTAS '97 Proceedings of the 3rd IEEE Real-Time Technology and Applications Symposium (RTAS '97)
A Comparision of Indexing Methods for Data Broadcast on the Air
ICOIN '98 Proceedings of the 13th International Conference on Information Networking
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Data management issues in mobile computing environments have got lots of concerns of relevant researchers. Among these research topics, data broadcast has been extensively investigated due to its advantages such as scalability and bandwidth effectiveness. While plenty of works have been done on this subject, it is still less touched when data broadcast is used to deliver constantly updated real-time data to read-only transactions with deadlines. In this paper, we first deeply analyze the data dissemination requirements for read-only transaction processing in mobile real-time computing environments and formally define several performance objectives. Then a novel updates dissemination protocol called mixed real-time data broadcast is proposed. In mixed real-time data broadcast, a set of new techniques including reducing the length of consistency intervals, immediate updates dissemination policy and on-demand data delivery are incorporated seamlessly. Moreover, an enhanced index structure is designed for read-only transactions to judge precisely when to request the desired data. Simulation results show that the proposed protocol can provide higher data currency and lower miss rate compared with existing updates dissemination protocols and is more appropriate for mobile real-time computing environments.