JCSE, vol. 3, no. 4, pp.260-277, 2009

DOI:

3-L Model: A Model for Checking the Integrity Constraints of Mobile Databases

Hamidah Ibrahim, Zarina Dzolkhifli Lilly Suriani Affendey Praveen Madiraju
Faculty of Computer Science and Information Technology, Universiti Putra Malaysia, Malaysia|Universiti Putra Malaysia, Malaysia|Department of Mathematics, Statistics and Computer Science, Marquette University, USA

Abstract: In this paper we propose a model for checking integrity constraints of mobile databases calledThree-Level (3-L) model, wherein the process of constraint checking to maintain the consistentstate of mobile databases is realized at three different levels. Sufficient and complete testsproposed in the previous works together with the idea of caching relevant data items forchecking the integrity constraints are adopted. This has improved the checking mechanism bypreventing delays during the process of checking constraints and performing the update. Also,the 3-L model reduces the amount of data accessed given that much of the tasks are performedat the mobile host, and hence speeds up the checking process.

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