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基于RTT优先位图匹配结合的邻居选择P2P拓扑

Keywords: 邻居选择,位图信息,往返时延(RTT)

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Abstract:

为解决随机的拓扑结构P2P流媒体系统中主干网络压力大、启动延迟长和帧丢失率高等问题,提出了一种基于往返时延(RTT)优先位图结合的邻居选择的算法.该算法利用Tracker服务器存储整个网络中所有节点之间的RTT信息和Buffer-Map的位图信息,节点向Tracker服务器发送邻居请求,Tracker服务器根据节点的RTT信息和位图信息及邻居筛选函数为节点生成最佳的邻居列表返回给节点.仿真实验证明:相对于随机的邻居选择算法,该算法有效地降低了节点的启动延迟、播放延迟和帧丢失率.

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