Supporting multi-user real-time VBR video service using dynamic bandwidth management based on prediction |
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Authors: | XU Zhi-yuan LI Hui LU Yue-ming JI Yue-feng |
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Affiliation: | Key Laboratory of Optical Communications and Lightwave Technologies,Beijing University of Posts and Telecommunications,Beijing 100876,China |
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Abstract: | Real-time variable bit rate (VBR) video is expected to take a significant portion of multimedia applications. However, plentiful challenges to VBR video service provision have been raised for its characteristic of high traffic abruptness. To support multi-user real-time VBR video transmission with high bandwidth utilization and satisfied quality of service (QoS), this article proposes a practical dynamic bandwidth management scheme. This scheme forecasts future media rate of VBR video by employing time-domain adaptive linear predictor and using media delivery index (MDI) as both QoS measurement and complementary management reference. In addition, to support multi-user application, an adjustment priorities classified strategy is also put forward. Finally, a test-bed based on this management scheme is established. The experimental results demonstrate that the scheme proposed in this article is efficient with bandwidth utilization increased by 20%-60% compared to a fixed service rate and QoS guaranteed. |
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Keywords: | dynamic bandwidth management MDI QoS real-time time-domain adaptive linear predictor VBR video |
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