Concurrency control in mobile distributed real-time database systems

Abstract With the rapid advances in mobile computing technology, there is an increasing demand for processing realtime transactions in a mobile environment. This paper studies concurrency control problem in mobile distributed real-time database systems (MDRTDBS). Based on the High Priority Two Phase Locking (HP-2PL) scheme, we propose a distributed real-time locking protocol, called Distributed High Priority Two Phase Locking (DHP-2PL), for MDRTDBS. In the protocol, the characteristics of a mobile computing systemare considered in resolving lock conflicts. Two strategies are proposed to further improve the system performance and to reduce the impact of mobile network on the performance of the DHP-2PL: (1) A transaction shipping approach is proposed to process transactions in a mobile environment by exploring the well-defined behavior of real-time transactions. (2) We explore the application semantics of real-time database applications by adopting the notion of similarity in concurrenc...

• Type: Journal
• Year: 2000
• Where: IS
• Authors: Kam-yiu Lam, Tei-Wei Kuo, Wai-Hung Tsang, Gary C. K. Law
• Keywords: Artificial Intelligence, IS 2000, Mobile Computing, Priority Two Phase, Two Phase Locking