Towards improving internet performance

致力于提高互联网性能

• 批准号: 9054-2008
• 负责人: Ito, Mabo
• 金额: $ 1.7万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2010
• 资助国家: 加拿大
• 起止时间: 2010-01-01 至 2011-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=450410
• 关键词: Towards; improving; internet; performance

Recent work by the applicant has been concerned with dealing with some of the performance and QoS (quality of service) issues which exist in current Internet, particularly for inelastic applications that are sensitive to delay and packet loss. The current Internet was originally designed to support flat, elastic, applications which are relatively insensitive to delay and where packet losses could be handled by retransmissions. Modern applications, such as video streaming and collaborative work require timely delivery and a QoS assurance level. Long propagation delays, by itself, makes retransmission infeasible in many cases and forwarding delays due to congestion and poor routing compound the problem Furthermore, services on the current Internet are network centric, whereas modern needs are more user/application centric. Thus, in recent years the applicant has done work on web caching, load sensitive dynamic routing, multicasting, discard policies for QoS maintenance in transport of MPEG streams, routing improvement in DHT-based P2P networks, simulation tools for large scale networks, route failure recovery for reserved routing.

申请人最近的工作涉及处理当前互联网中存在的一些性能和QoS（服务质量）问题，特别是对于对延迟和分组丢失敏感的非弹性应用。当前的互联网最初被设计为支持平坦的、弹性的应用，这些应用对延迟相对不敏感，并且可以通过重传来处理分组丢失。视频流和协作工作等现代应用需要及时交付和QoS保证级别。长传播延迟本身使得重传在许多情况下不可行，并且由于拥塞和不良路由导致的转发延迟加剧了问题。此外，当前互联网上的服务是以网络为中心的，而现代需求更多地以用户/应用为中心。因此，近年来，申请人已经在web高速缓存、负载敏感动态路由、多播、用于MPEG流的传输中的QoS维护的丢弃策略、基于DHT的P2P网络中的路由改进、用于大规模网络的仿真工具、用于保留路由的路由故障恢复方面进行了工作。