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Mobile Information Systems
Volume 1, Issue 3, Pages 149-166

Semantic Prefetching Strategy to Manage Location Dependent Data in Mobile Information Systems

Sang-Won Kang, MoonBae Song, KwangJin Park, and Chong-Sun Hwang

Department of Computer Science and Engineering, Korea University 5-1, Anam-dong, Seongbuk-Ku, Seoul 136-701, Republic of Korea

Received 17 October 2005; Accepted 17 October 2005

Copyright © 2005 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


In mobile computing environments, location plays an important role in determining user's interests. If service providers can supply information reflecting users' semantics, overall system performance can be improved. Users can avoid queries, resulting in unnecessary network usage. A query result can also be transferred to a local device. Through our proposed semantic prefetching scheme, we make it possible to send data to mobile clients in advance. Researchers have been, for a long time, trying to develop a method to overcome mobile information system issues. These issues consist mainly of low bandwidth, high delay and frequent disconnections. In this paper, we represent the semantic prefetching strategy, which utilizes users' interests, relating to a users' current location. Our performance results show that this method is superior when compared with traditional semantic cache schemes.