Updates Dissemination in Mobile Real-Time Database Systems

Li Guohui; Wang Hongya; Liu Yunsheng

Journal of Computer Research and Development > 2005 > 42(11): 2004-2009.

Li Guohui, Wang Hongya, Liu Yunsheng. Updates Dissemination in Mobile Real-Time Database Systems[J]. Journal of Computer Research and Development, 2005, 42(11): 2004-2009.

Citation:

Li Guohui, Wang Hongya, Liu Yunsheng. Updates Dissemination in Mobile Real-Time Database Systems[J]. Journal of Computer Research and Development, 2005, 42(11): 2004-2009.

Citation:

Li Guohui, Wang Hongya, Liu Yunsheng. Updates Dissemination in Mobile Real-Time Database Systems[J]. Journal of Computer Research and Development, 2005, 42(11): 2004-2009.

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Updates Dissemination in Mobile Real-Time Database Systems

1(College of Computer Science & Technology, Huazhong University of Science & Technology, Wuhan 430074) 2(Department of Information & Technology, Central China Normal University, Wuhan 430079)

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Published Date: November 14, 2005

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Abstract

Abstract

Data broadcast is a widely accepted data dissemination method for mobile computing systems and has held a lot of interest of relevant researchers. When data broadcast is used to disseminate frequently-updated data it is called updates dissemination. Existing updates dissemination protocols are unsuitable for mobile real-time read-only transaction processing because they don't consider the real-time constraints on both data and transactions in mobile real-time database systems. In this paper a new updates dissemination protocol called hybrid forward multi-version data broadcast(HFMVB) is proposed. HFMVB not only guarantees the consistency of read-only transactions，it also provides higher data currency and lower miss rate by shortening the consistency interval, instantly broadcasting updates and utilizing broadcast on-demand. Simulation results show that HFMVB has better performance compared with the existing updates dissemination protocols and is more appropriate for mobile real-time database systems.

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