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基于BitTorrent的流媒体缓存及调度方案

Keywords: BitTorrent,媒体服务器,缓存替换,数据调度

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Abstract:

为了有效地利用硬件资源,提供高质量的流媒体播放,提出了一种基于BitTorrent的流媒体缓存及调度方案.首先,利用媒体段的流行度和供求值定义了价值函数,提出了基于价值函数的缓存替换算法(cachingalgorithmbasedonvaluefunction,CAVF);其次,针对数据段及节点带宽的特征,设计了基于数据段优先级的调度算法(schedulingalgorithmbasedonsegmentpriority,SASP).实验结果表明:该方案提高了缓存命中率,降低了服务器的负载并增强了媒体播放连续度.

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