基于网络编码的P2P流媒体系统中段粒度研究  

Research on Segment Granularity in P2P Streaming Systems Based on Network Coding

作　　者：李姗[1] 

机构地区：[1]长沙师范学院电子信息工程系,湖南长沙410100

出　　处：《计算机技术与发展》2015年第4期61-66,共6页Computer Technology and Development

基　　金：湖南省教育科学研究青年项目(12B012)

摘　　要：网络编码技术为进一步提高P2P流媒体系统的性能和服务质量指明了新的方向。应用网络编码技术,分段的媒体文件被进一步划分成多个数据块,随机线性网络编码作用在同一段的数据块上。段粒度即段内的数据块数目,作为编码范围,其取值大小直接影响到系统各个方面的性能,是优化基于网络编码的P2P流媒体系统的关键参数。文中从系统实现和理论分析两个方面,分类讨论了相关技术方案中段粒度取值方法,并分析了其优缺点,并对今后段粒度最优取值方法研究思路进行了展望。Network coding technology marks a new direction to further improve the performance and service quality of P2P streaming systems. Applying the network coding technology, segmented media files are further split into blocks, random linear network coding are performed in each segment. Segment granularity is the number of blocks in each segment. As the range of network coding, it is regarded as one of the key parameters for system optimization. The value of segment granularity directly affects various aspects of the P2P streaming systems. Through the system implementation and theoretical analysis, discuss the different methods to determine the values of segment granularity respectively, and analyze their merits and drawbacks, and propose the ideas on how to find optimal segment granularity in the future.

关 键 词：网络编码 P2P流媒体系统 段粒度 最优取值 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]