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。尽管点对点 (P2P) 直播视频系统有多个大规模工业部署，但这些现有系统具有几个基本性能频道切换延迟大、播放延迟大、冷门频道性能差、ISP 不友好等问题。在这些传统系统中，对等方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 实时视频流方法，即视图-上传解耦 (VUD)。 VUD 的主要思想是让每个对等点分配一个或多个频道，并且分配的进行与对等点正在观看的内容无关。与传统的隔离通道设计相比，这种新颖的方法具有三个主要优点：通道扰动抗扰度；跨通道复用；以及结构化流媒体的启用。 PI 正在为多通道 P2P 视频流系统开发易于处理的分析性能模型，适用于 VUD 和传统设计方法。分析结果不仅凸显了 VUD 方法的优势，而且还为 VUD 系统的设计提供了重要的“经验法则”。 PI 正在开发动态 VUD 配置算法，该算法既能有效应对频道流失，又能适应动态频道流行度和闪存人群。 PI 正在开发 VUD 配置、管理和流媒体方案，该方案考虑了 ISP 的位置并大大减少了 ISP 网络上的视频流流量。 PI 及其博士生也在开发一个开源 VUD 原型。