【精品文档】-基于有向无环图的P2P流媒体播放系统.pdf

专 业 推 荐 ↓ 精 品 文 档 ·网 络· 基于有向无环图的P2P 流媒体播放系统 ① ② ③ 刘其群 ， 黄河清 ， 冯文峰 (①河南农业职业学院，河南 郑州 451450；②华北电网电力调度通信中心，北京 100053； ③河南理工大学计算机科学与技术学院，河南 焦作 454002) 【摘 要】文中针对 P2P 流媒体播放中的网络拓扑构建问题，通过抽象和刻画播放节点之间的媒体同步关系，提出了基 于有向无环图结构的网络拓扑构建技术。实验表明，该技术具有数据传输率高，播放延迟小等优点。基于该技术实现的 P2P 流媒体播放系统已经部署在Cernet2网络中。 【关键词】P2P；流媒体；有向无环图；同步 【中图分类号】TP393 【文献标识码】A 【文章编号】1002-0802(2009)07-0202-03 P2P Streaming Media Playing System Based on Directed Acyclic Graph Algorithm ① ② ③ LIU Qi-qun ， HUANG He-qing ， FEN Wen-feng (①Henan Agricultural Vocational College, Zhengzhou Henan 451450, China； ②Power Control Center of North China Electricity Grid, Beijing 100053, China； ③College of Computer Science and Technology, Henan Polytechnic University, Jiaozuo Henan 454002, China) 【Abstract】Aiming at the construction of network topology in P2P streaming media playing, this paper proposes a technology based on directed acyclic graph algorithm by abstracting and portraying media synchronization of playing nodes. Experiments show that this technology has the advantage of high efficiency data transmission and short playing delay time. P2P streaming media playing system based on this technology has been deployed in Cernet2 network. 【Key words】P2P; streaming media; directed acyclic graph algorithm; synchronization 0 引言