Broadcasting scheme with low client buffers and bandwidths for video-on-demand applications |
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Authors: | Hsiang-Fu Yu Hung-Chang Yang Yao-Tien Wang Ping-Lin Fan Chu-Yi Chien |
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Affiliation: | (1) Department of Computer Science, National Taipei University of Education, Taipei, Taiwan;(2) Department of Computer Science & Information Engineering, National Central University, Taoyuan, Taiwan;(3) Department of Information Management, Kainan University, Taoyuan, Taiwan;(4) The Graduate School of Toy and Game Design, National Taipei University of Education, Taipei, Taiwan |
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Abstract: | Efficient data broadcasting is independent of request arrivals, and is thus highly promising when transmitting popular videos.
A conventionally adopted broadcasting method is periodic broadcasting, which divides a popular video into segments, which
are then simultaneously broadcast on different data channels. Once clients want to watch the video, they download the segments
from these channels. The skyscraper broadcasting (SkB) scheme supports clients with small bandwidths. An SkB client requires
only two-channel bandwidths to receive video segments. This work proposes a reverse SkB (RSkB) scheme, which extends SkB by
reducing buffering spaces. The RSkB is mathematically shown to achieve on-time video delivery and two-channel client bandwidths.
A formula for determining the maximum number of segments buffered by an RSkB client is presented. Finally, an analysis of
RSkB reveals that its client buffer requirements are usually 25–37% lower than SkB. Extensive simulations of RSkB further
demonstrate that RSkB yields lower client buffer demand than other proposed systems.
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Keywords: | Periodic broadcasting Video-on-demand (VOD) Buffer Cable TV |
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