Concurrency Control in Database Systems
IEEE Transactions on Knowledge and Data Engineering
MDA '99 Proceedings of the First International Conference on Mobile Data Access
Dynamic Adjustment of Serialization Order Using Timestamp Intervals in Real-Time Databases
RTCSA '99 Proceedings of the Sixth International Conference on Real-Time Computing Systems and Applications
Certification reports: supporting transactions in wireless systems
ICDCS '97 Proceedings of the 17th International Conference on Distributed Computing Systems (ICDCS '97)
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As technological advances are made in software and hardware, the feasibility of accessing information "any time, anywhere" is becoming a reality. In a mobile computing environment, a potentially large number of mobile and fixed users may simultaneously access shared data; . In this paper, we have addressed the problem and devised an effective OCC protocol with deferred adjustment of serialization order, called OCC-DF, for MDBS with mixed transactions. The characteristics of the OCC-DF protocol have been examined in detail by simulation. The results show that the performance of the OCC-DF protocol is consistently better than OCC-TI protocol over a wide range of system settings. In particular, the OCC-DF protocol provides a more significant performance gain in mixed transaction environments.