基于网络编码的P2P-VoD数据调度算法  

Data Scheduling Algorithm of P2P-VoD Based on Network Coding

作　　者：胡玉琦[1] 王勇[1] 蔡璐玮[1] 

机构地区：[1]燕山大学信息科学与工程学院,秦皇岛066004

出　　处：《计算机工程》2010年第15期9-11,共3页Computer Engineering

基　　金：国家自然科学基金资助项目(60273078)

摘　　要：针对基于网络编码的P2P-VoD数据调度中对Peer节点异构性和网络动态性考虑不足的问题,提出一种基于自适应随机线性网络编码的P2P-VoD数据调度算法。Peer节点根据自身缓存、链路可用带宽和视频块的播放时限自适应调整网络编码窗口大小。基于NS2设计P2P-VoD仿真通用平台进行实验。实验结果表明,该算法具有节点的自适应异构性和网络动态性,能提高Peer节点的视频播放连续度。Aiming at the problem of the lack consideration of Peer node heterogeneity and the dynamics of networks in data scheduling of P2P-VoD based on network coding,a data scheduling algorithm of P2P-VoD based on adaptive random network coding is proposed.Network coding window is adaptively adjusted by the Peer node according to its cache,the link available bandwidth and the deadline of playable block.The simulation is conducted on the general P2P-VoD simulation platform based on NS2 design.Experimental results show that the node heterogeneity and the dynamics of networks are adaptive,the playback continuity index in the peer node is enhanced.

关 键 词：网络编码 视频点播 数据调度 NS2模拟器 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]