Lee Seung-Hwa, Cho Jae-Woo, Lee Eun-Seok

The KIPS Transactions:PartD, Vol. 13, No. 6, pp. 839-846, Oct. 2006
http://dx.doi.org/10.3745/KIPSTD.2006.13D.6.839,   PDF Download:
Keywords: context-awareness, adaptive system, Distributed Computing, Ubiquitous Computing
Abstract

Context-aware adaptive service for overcoming the limitations of wireless devices and maintaining adequate service levels in changing environments is becoming an important issue. However, most existing studies concentrate on an adaptation module on the client, proxy, or server. These existing studies thus suffer from the problem of having the workload concentrated on a single system when the number of users increases md, and as a result, increases the response time to a user's request. Therefore, in this paper the adaptation module is dispersed and arranged over the client, proxy, and server. The module monitors the contort of the system and creates a proposition as to the dispersed adaptation system in which the most adequate system for conducting operations. Through this method faster adaptation work will be made possible even when the numbers of users increase, and more stable system operation is made possible as the workload is divided. In order to evaluate the proposed system, a prototype is constructed and dispersed operations are tested using multimedia based learning content, simulating server overload and compared the response times and system stability with the existing server based adaptation method. The effectiveness of the system is confirmed through this results.

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