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作者 Drakatos, Stylianos
書名 Context-aware data caching for mobile computing environments
說明 132 p
附註 Source: Dissertation Abstracts International, Volume: 68-01, Section: B, page: 0493
Advisers: Niki Pissinou; Kia Makki
Thesis (Ph.D.)--Florida International University, 2006
The deployment of wireless communications coupled with the popularity of portable devices has led to significant research in the area of mobile data caching. Prior research has focused on the development of solutions that allow applications to run in wireless environments using proxy based techniques. Most of these approaches are semantic based and do not provide adequate support for representing the context of a user (i.e., the interpreted human intention.). Although the context may be treated implicitly it is still crucial to data management. In order to address this challenge this dissertation focuses on two characteristics: how to predict (i) the future location of the user and (ii) locations of the fetched data where the queried data item has valid answers. Using this approach, more complete information about the dynamics of an application environment is maintained
The contribution of this dissertation is a novel data caching mechanism for pervasive computing environments that can adapt dynamically to a mobile user's context. In this dissertation, we design and develop a conceptual model and context aware protocols for wireless data caching management. Our replacement policy uses the validity of the data fetched from the server and the neighboring locations to decide which of the cache entries is less likely to be needed in the future, and therefore a good candidate for eviction when cache space is needed. The context aware driven prefetching algorithm exploits the query context to effectively guide the prefetching process. The query context is defined using a mobile user's movement pattern and requested information context. Numerical results and simulations show that the proposed prefetching and replacement policies significantly outperform conventional ones
Anticipated applications of these solutions include biomedical engineering, tele-health, medical information systems and business
School code: 1023
DDC
Host Item Dissertation Abstracts International 68-01B
主題 Engineering, Electronics and Electrical
Computer Science
0544
0984
Alt Author Florida International University
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