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首页> 外文会议>Conference on Multimedia Modeling: Modeling Multimedia Information and Systems (MMM 2000) Nov 13-15, 2000, Nagano, Japan >PERFORMANCE ANALYSIS OF A BUFFER MANAGEMENT TECHNIQUE FOR INTERACTIVE VIDEO-ON-DEMAND
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PERFORMANCE ANALYSIS OF A BUFFER MANAGEMENT TECHNIQUE FOR INTERACTIVE VIDEO-ON-DEMAND

机译：交互式视频点播缓冲区管理技术的性能分析

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摘要

Recently several design alternatives have been proposed for interactive Video-On-Demand (VOD) systems to satisfy the increasing performance and quality of service (QoS) requirements. Interval caching is a buffer management technique, which can be implemented in conjunction with other techniques to further improve a VOD server performance. This mechanism exploits the temporal locality of requests to the same movie and tries to serve requests from the cache, thereby enhancing system throughput. Earlier studies have examined interval caching with only normal playback operations and have not considered various interactive VCR functionalities such as fast forward, rewind, and pause. Moreover, the complexity of the problem has confined the evaluation methodology to simulation. In this paper, we present a mathematical model for analyzing the performance of an interactive video server that uses interval caching. The model captures the complex interactions of five different VCR operations and predicts the improvement in system throughput due to interval caching. Validation through simulation shows that the model is quite accurate in predicting performance over a wide range of parameters. The usefulness of the model, as a design tool in studying server performance for varying user-interactivity and system parameters, is demonstrated through several examples.
机译：最近，已经提出了几种交互式视频点播（VOD）系统的设计替代方案，以满足日益增长的性能和服务质量（QoS）要求。间隔缓存是一种缓冲区管理技术，可以与其他技术结合实施以进一步提高VOD服务器的性能。此机制利用了对同一电影的请求的时间局部性，并尝试为来自缓存的请求提供服务，从而提高了系统吞吐量。较早的研究仅使用正常的播放操作检查了间隔缓存，并未考虑各种交互式VCR功能，例如快进，快退和暂停。此外，问题的复杂性已将评估方法局限于仿真。在本文中，我们提出了一个数学模型来分析使用间隔缓存的交互式视频服务器的性能。该模型捕获了五个不同VCR操作的复杂交互，并预测了由于间隔缓存而导致的系统吞吐量的提高。通过仿真验证表明，该模型在预测广泛参数范围内的性能方面非常准确。通过几个示例证明了该模型作为研究服务器性能以改变用户交互性和系统参数的设计工具的有用性。

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