An efficient data placement for query-set-based broadcasting in mobile environments

南華大學機構典藏系統 > 科技學院 > 資訊管理學系 > 期刊論文 > Item 987654321/25076

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题名:	An efficient data placement for query-set-based broadcasting in mobile environments
作者:	吳光閔;Wu, Guang-Ming
貢獻者:	資訊管理學系
关键词:	Wireless broadcast;Data placement
日期:	2007-03
上传时间:	2017-07-18 15:47:34 (UTC+8)
摘要:	Broadcast is an efficient and scalable method for resolving the bandwidth limitation in a wireless environment. Because the ordering of data items on a broadcast channel affects clients' access time, deciding data placement in a broadcast channel to reduce clients' access time is an important issue. Most previous research assumes that each mobile client needs only one data item. However, in many situations, a mobile client might need more than one data item. In this paper, we present a two-stage scheme of initial placement generation and placement refinement to solve the placement problem for query-set-based broadcasting in mobile environment. The first stage employs a constructive method to obtain an initial placement; data items are scheduled using an eigenvector optimization method. The second stage applies a simulated annealing approach to improve the initial placement. Experimental results show that our approach outperforms QEM [7] and IQEM [3]methods in total access time.
關聯:	Computer Communications vol. 30, no. 5 pp.1075-1081
显示于类别:	[資訊管理學系] 期刊論文

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