Affiliations: [a] Department of Mathematics and Computer Science, Georgia College & State University, Milledgeville, GA 31061, USA. Tel.: +1 478 445 1626; Fax: +1 478 445 2602; E-mail: [email protected] | [b] Department of Computer Science and Engineering, Southern Methodist University, Dallas, TX 75275, USA. Tel.: +1 214 768 3087; Fax: +1 214 768 3085; E-mail: [email protected]
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Corresponding author.
Abstract: Unlike a traditional client-server network, a mobile computing environment has a very limited bandwidth in a wireless link. Thus, one design goal of caching management in a mobile computing environment is to reduce the use of wireless links. This is the primary objective for this research. Quota data and private data mechanisms are used in our design so that an MU user is able to query and update data from the local DBMS (The local DBMS contains cache data on an MU.) without cache coherence problems. The effect of the two mechanisms is to increase the hit ratio. An agent on an MU along with a program on a base station are used to handle the caching management, including prefetching/hoarding, cache use, cache replacement, and cache-miss handling. The simulation results clearly indicate that our approaches are improvements to the previous research.
Keywords: caching, mobile computing, mobile DBMS, mobile unit (MU), database, agent, user profile, validation report (VR)
