NeTS:Small:View-Upload Decoupling: A Redesign of Multi-Channel P2P Video Systems

NeTS:Small:查看-上传解耦：多通道 P2P 视频系统的重新设计

• 批准号: 0916734
• 负责人: Yong Liu
• 金额: $ 40万
• 依托单位: Polytechnic University of New York
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-08-01 至 2013-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0916734&HistoricalAwards=false
• 关键词: NeTS; Small; View; Upload; Decoupling

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).Although there are several large-scale industrial deployments of peer-to-peer (P2P) live video systems, these existing systems have several fundamental performance problems, including huge channel switching delays, large playback lags, poor performance for less-popular channels, ISP unfriendliness. In these traditional systems, a peer only redistributes the video it is currently watching. In this research, the PIs are exploring a radically different approach to P2P live video streaming, View-Upload Decoupling (VUD). The main idea of VUD is to have each peer distribute one or more channels, with the assignments being made independently of what the peer is viewing. This novel approach has three major advantages over the traditional isolated-channel designs: channel-churn immunity; cross-channel multiplexing; and the enabling of structured streaming. The PIs are developing tractable analytical performance models for multi-channel P2P video streaming systems, for both VUD and traditional design approaches. The analytical results not only highlight the advantages of the VUD approach, but also provide important ``rules-of-thumb'' for the design of VUD systems. The PIs are developing dynamic VUD provisioning algorithms that are both robust with respect to channel churn and also adapt to dynamic channel popularity and flash crowds. The PIs are developing VUD provisioning, management and streaming schemes that take into account ISP locality and largely reduce the video streaming traffic imposed on ISP networks. The PIs and their PhD students are also developing an open-source VUD prototype.

该奖项是根据2009年美国复苏和再投资法案（公法111-5）资助的。虽然有几个大规模的点对点（P2P）视频直播系统的工业部署，这些现有的系统有几个基本的性能问题，包括巨大的频道切换延迟，大播放滞后，不太受欢迎的频道性能差，ISP不友好。在这些传统系统中，对等体仅重新分发其当前正在观看的视频。在这项研究中，PI正在探索一种完全不同的P2P直播视频流的方法，即视图上传解耦（VUD）。VUD的主要思想是让每个对等体分发一个或多个频道，分配独立于对等体正在观看的内容。与传统的隔离信道设计相比，这种新方法具有三个主要优点：信道扰动免疫性;跨信道复用;以及结构化流的实现。PI正在为VUD和传统设计方法开发多通道P2P视频流系统的易处理分析性能模型。分析结果不仅突出了VUD方法的优点，但也提供了重要的“经验法则”的VUD系统的设计。PI正在开发动态VUD供应算法，这些算法在频道流失方面是鲁棒的，并且还适应动态频道流行度和闪存人群。PI正在开发VUD供应、管理和流传输方案，这些方案考虑到ISP的本地性，并大大减少了对ISP网络的视频流传输流量。PI和他们的博士生也在开发一个开源的VUD原型。