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Concurrency control of real-time transactions with disconnections in mobile computing environment

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4 Author(s)
GuoQiong Liao ; Sch. of Comput. Sci. & Technol., Huazhong Univ. of Sci. & Technol., Wuhan, China ; YunSheng Liu ; LiNa Wang ; ChuJi Peng

In mobile real-time database systems, the objects of concurrency control should take saving system resources and supporting disconnection into consideration, besides ensuring database consistency, reducing the number of expired transactions and avoiding "priority inversion". In the paper, a nested transaction model for mobile real-time transactions is discussed. Then a divergence control lock model based on prudent ordered sharing and a check-out/check-in protocol supporting disconnections are given. DC/POS-PAI-2PL is a two-phase lock strategy integrating these methods for mobile real-time transactions. The performances of DC/POS-PAI-2PL are analyzed in the end. It is shown that the suggested transaction model and DC/POS-PAI-2PL can improve system performances.

Published in:
Computer Networks and Mobile Computing, 2003. ICCNMC 2003. 2003 International Conference on

Date of Conference: 20-23 Oct. 2003

Page(s):
205 - 212
Print ISBN:
0-7695-2033-2
INSPEC Accession Number:
7854869
Digital Object Identifier :
10.1109/ICCNMC.2003.1243047
Product Type:
Conference Publications

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