P2P流媒体系统的数据调度反馈控制实现  

Realizing a feedback control of data scheduling in P2P streaming systems

作　　者：李晓林[1,2] 王劲林[1] 尤佳莉[1] 

机构地区：[1]中国科学院声学研究所国家网络新媒体工程技术研究中心,北京100190 [2]中国科学院大学声学研究所,北京100039

出　　处：《华中科技大学学报（自然科学版）》2013年第10期105-109,共5页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：中国科学院战略性先导科技专项基金资助项目(XDA06010302);国家自然科学基金资助项目(60972082);国家科技支撑计划资助项目(2011BAH11B05)

摘　　要：提出一种设进的数据调度反馈控制系统,将节点数据调度过程中的数据接收量、邻居节点的缓冲区映像与服务调度中的上行带宽利用率等信息作为反馈控制信息,生成邻居节点提供数据的能力等控制量,控制节点生成数据片优先级与向邻居节点分配数据请求,以提高节点从邻居节点获取数据的效率,提高节点的播放连续度,增强系统的鲁棒性.仿真结果表明:反馈控制实现能够更加有效地利用节点的上行带宽,提高节点的播放连续度.The data reception amount of the data scheduling were adopted in the data scheduling control system （DSCS）. The buffer maps of neighbor nodes and upload bandwidth were utilized in the service scheduling as feedback information. The capacity of DSCS that neighbor nodes can provide data was predicted based on the feedback information. The processes that the nodes calculate the data priority and allocate the data requests to the neighbors were controlled, which can improve the efficiency of node obtaining the data from the neighbors and the noders continuity, to enhance the system robustness. Simulation results show that the system can more efficiently use the upload bandwidth of the nodes and improve the playback continuity of the nodes.

关 键 词：对等网络 流媒体 反馈控制 动态性 数据调度 服务调度 

分 类 号：TN393[电子电信—物理电子学]