中文摘要：

个人计算机性能的提高和网络带宽的增加使得P2P流媒体应用系统迅速发展,本文对P2P流媒体系统模型和最大数据传输速率进行研究.提出一种P2P流媒体系统稳定状态下的系统模型,该模型使用较少的参数刻画系统在稳定状态下的属性.推导证明系统在稳定状态下支持的最大数据传输速率,并提出一种集中式算法WFSOT,快速构造支持最大数据传输速率的节点拓扑结构及分配节点带宽.对WFSOT算法进行分析,重点讨论节点在拓扑结构中深度的变化.

英文摘要：

P2P streaming applications develop quickly with the enhancement of PC＇s performance and network bandwidth.In this paper the system model and the maximum data transmitting rate of P2P streaming system were studied.We presented a system model of P2P streaming system under stable state,which could capture the characteristic of the system by a few parameters.The maximum data transmitting rate of the stable system was derived and proven,and a centralized algorithm named WFSOT was designed to organize nodes into an overlay quickly which could support the maximum data transmitting rate and allocate nodes＇ practicable bandwidth.At last,we discussed several aspect of the WFSOT algorithm,especially the node＇s depth in the overlay topology.