基于宽带城域网的P2P流媒体直播模型与方法

为了解决现行P2P直播系统存在启动延时长、画面质量差的问题，提出了一种基于分布式树状拓扑结构的模型架构及其实现方法。该模型由服务器组、超级节点组和普通节点组共同组成分布式P2P流媒体分发网络，通过采用非平衡的MDC编码方案和动态的普通节点服务请求策略，有效解决了启动延时过长的问题；通过优化节点缓冲区的基本结构，并采用推拉结合的缓冲区调度策略，大大提高了网络的分发效率，有效解决了节点播放不畅的问题。实验证明，与现行直播系统相比，该模型具有更短的播放启动延时和更好的播放体验。

A New Model and Method of P2P Live Streaming System for Telecom Broadband Metropolitan

In order to solve the problem of delayed start-up playing time and poor quality of playing in the current live streanaing media system,it proposed a new model and method of P2P live streaming system based on distributed tree topology structure. This model is a distributed P2P streaming media distribution network, which is composed of server group, super node group and common node group. It is solved that start-up playing time is long by using the unbalanced MDC coding scheme and dynamic common node service request strategy. It is also solved that quality of playing .is poor by optimizing the basic structure of node buffer and using push and pull scheduling strategy of the combination of the buffer. The experiment shows that this model has the more shorter start-up playing delay and better playing experience.