Database system issues in nomadic computing
SIGMOD '93 Proceedings of the 1993 ACM SIGMOD international conference on Management of data
Building information systems for mobile environments
CIKM '94 Proceedings of the third international conference on Information and knowledge management
Sleepers and workaholics: caching strategies in mobile environments
SIGMOD '94 Proceedings of the 1994 ACM SIGMOD international conference on Management of data
Mobile wireless computing: challenges in data management
Communications of the ACM
Broadcast disks: data management for asymmetric communication environments
SIGMOD '95 Proceedings of the 1995 ACM SIGMOD international conference on Management of data
A mobile transaction model that captures both the data and movement behavior
Mobile Networks and Applications
Efficient concurrency control for broadcast environments
SIGMOD '99 Proceedings of the 1999 ACM SIGMOD international conference on Management of data
Read-only transactions in a distributed database
ACM Transactions on Database Systems (TODS)
Supporting Read-Only Transactions in Wireless Broadcasting
DEXA '98 Proceedings of the 9th International Workshop on Database and Expert Systems Applications
Scalable Processing of Read-Only Transactions in Broadcast Push
ICDCS '99 Proceedings of the 19th IEEE International Conference on Distributed Computing Systems
Are “Disks in the Air” Just Pie in the Sky?
WMCSA '94 Proceedings of the 1994 First Workshop on Mobile Computing Systems and Applications
Characterizing the Temporal and Semantic Coherency of Broadcast-Based Data Dissemination
ICDT '03 Proceedings of the 9th International Conference on Database Theory
Optimistic Concurrency Control Based on Timestamp Interval for Broadcast Environment
ADBIS '02 Proceedings of the 6th East European Conference on Advances in Databases and Information Systems
Quasi-consistency and Caching with Broadcast Disks
MDM '01 Proceedings of the Second International Conference on Mobile Data Management
Timestamp based concurrency control in broadcast disks environment
AIS'04 Proceedings of the 13th international conference on AI, Simulation, and Planning in High Autonomy Systems
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In many mobile computing systems, most of the transactions are read-only. In this paper, we propose an algorithm to process read-only transactions in broadcast environments such that the serializability of transactions is maintained. The serializability of transactions is a crucial issue in applications such as stock trading. However, in broadcast environments, the upstream communication capacity from mobile clients to the server is very limited. Therefore, conventional concurrency control protocols, which require equal bandwidth of communication on both sides of mobile clients and the server, become handicapped in this environment. In our algorithm, read-only transactions can be completed locally and autonomously at the mobile clients without upstream communication, which is a highly desirable feature for the scalability of applications running in broadcast environments. The simulation results show that our proposed algorithm performs well in a wide range of settings.