P2PVoD中基于束层的调度策略研究与设计

The Research and Design of Scheduling Strategy based on Bundle Layer in P2P VoD

由于P2P环境的高度动态性和异构性,以及流媒体服务的高宽带和连续性强的特征,P2P点播系统中数据片断的调度便显得尤为重要。本文针对基于数据驱动的网状P2P点播系统提出了基于束层的调度策略,通过合理地分配紧急数据片断的调度和非紧急数据片断的调度以保证视频连续播放。模拟实验表明,该调度策略能够很好地保证视频的连续播放。

Due to the high dynamics and heterogeneity of P2P,and the high bandwidth and contin-uity of media streaming services,the scheduling of data segments in the P2P VoD systems is particularly important.This paper presents a scheduling strategy based on the bundle layer for data-driven mesh-based P2P VoD systems.Through scheduling data segments in urgent set and non-urgent set reasonably,it can guarantee the video for playback continuously.Simulation results show that this scheduling strategy can guarantee the continuity of video in P2P VoD system.