An O(N log K) Restricted Dynamic Programming Algorithm for Data Allocation over Multiple Channels(Broadcast Systems)
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概要
- 論文の詳細を見る
Data broadcast has become a promising approach to achieving information dissemination in wireless environments due to the limited channel bandwidth and the power constraints of portable devices. In this paper, a restricted dynamic programming approach which generates broadcast programs is proposed to partition data items over multiple channels near optimally. In our approach, a function to predict the optimal average expected delay, in terms of the number of channels, the summation of the access frequencies of data items, and the ratio of the data items is developed by employing curve fitting. Applying this function, we can find a cut point that may be very close to the optimal cut. Thus, the search space in dynamic programming can be restricted to the interval around a determined cut point. Therefore, our approach only takes O(N log K) time, where N is number of data items and K is the number of broadcast channels. Simulation results show that the solution obtained by our proposed algorithm is near-optimal.
- 一般社団法人電子情報通信学会の論文
- 2005-09-01
著者
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Chen Hsing‐lung
National Taiwan Univ. Sci. And Technol. Taipei Twn
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WANG Shuoi
Department of Computer Science and Information Engineering, National Taiwan University of Science an
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CHEN Hsing-Lung
Department of Electronic Engineering, National Taiwan University of Science and Technology
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Wang Shuoi
Department Of Computer Science And Information Engineering National Taiwan University Of Science And
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Chen Hsing-lung
Department Of Electronic Engineering National Taiwan University Of Science And Technology
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- An O(N log K) Restricted Dynamic Programming Algorithm for Data Allocation over Multiple Channels(Broadcast Systems)