Internet Protocol and Application Performance

许多人、企业和政府现在高度依赖互联网来传递信息，无论是出于商业、教育还是娱乐目的。这些基于互联网的应用的例子包括点对点(P2P)文件共享应用(BitTorrent、Gnutella)、文件托管服务(RapidShare、Hotfile)、媒体流应用(YouTube、P2P Live、IPTV)、在线社交网络(Facebook、LinkedIn)、基于Web的服务等等。然而，这些应用经常具有不可预测的性能，特别是当用户是移动的(例如，在无线/蜂窝网络上)或当交换的网络业务量很大时。这些网络性能问题中的许多都是由于用于构建Internet应用程序的不同通信协议之间的意外交互引起的。我提出的研究计划的总体高层目标是：(1)测量、表征和识别互联网应用中的网络性能问题；以及(2)提出、分析、实施和评估针对这些问题的创新和有效的解决方案。这些总体目标将指导广泛的互联网技术和应用的研究探索，包括基于Web的系统、P2P系统、流媒体系统和无线移动网络。研究将采用实验、模拟和数学分析相结合的方法。实证测量和实验评价将是本研究的主要内容。该研究计划将培训硕士和博士生掌握在加拿大ICT行业取得成功所需的技能，开发下一代互联网技术和应用程序。

Many people, businesses, and governments are now highly-dependent on the Internet for the delivery of information, whether for business, education, or entertainment purposes. Examples of these Internet-based applications include peer-to-peer (P2P) file sharing applications (BitTorrent, Gnutella), file hosting services (RapidShare, HotFile), media streaming applications (YouTube, P2PLive, IPTV), on-line social networks (Facebook, LinkedIn), Web-based services, and many more.These innovative applications are widely used. However, these applications can often have unpredictable performance, particularly when users are mobile (e.g., on wireless/cellular networks) or when the network traffic volumes exchanged are large. Many of these network performance problems arise from unexpected interactions between different communication protocols that are used to build Internet applications. The general high-level objectives of my proposed research program are: (1) To measure, characterize, and identify network performance problems in Internet applications; and (2) To propose, analyze, implement, and evaluate innovative and effective solutions to these problems.These general objectives will guide the research exploration across a wide range of Internet technologies and applications, including Web-based systems, P2P systems, media streaming systems, and wireless mobile networks. The research will use a combination of experimental, simulation, and mathematical analysis approaches. Empirical measurement and experimental evaluation will be mainstays in the research. The research program will train MSc and PhD students with the skills needed for success in Canada's ICT sector, developing next-generation Internet technologies and applications.