iSWORD: Instrumented Streaming Research and Testbed

本提案为可扩展广域按需可靠数字（SWORD）流媒体的新方法的设计、实现和仪器研究寻求资金。这项研究的更大目标是通过设计新的实用的、经济有效的方法，对非常流行的流媒体内容进行实时点播，从而实现新的流媒体应用，例如，无论何时何地，客户端想要观看电视节目，都可以立即访问电视节目。研究的关键方面是：1。创新实用的可靠多播技术的发展，优化客户端流共享以节省服务器和网络带宽，改善带宽成本共享，并最大化系统可扩展性。在因特网或卫星/有线网络或这些网络技术的任何组合上工作的传送技术的设计。开发新的指标和模型，以确定哪些流行的流或部分流应该在区域（或代理）服务器上缓存，以最大限度地减少数据的交付成本。为流媒体传输协议开发新的网络仪器设备，使人们能够深入了解网络事件和条件对协议性能的影响。使用新的在线网络仪器设备来开发新的流媒体方法，以最佳地适应当前的网络条件。一个新的测试平台的开发，允许实验替代新的可靠的多播方法，以及替代算法缓存流媒体内容更接近客户端，使用新的仪器设备，并在一个实时环境中无缝和透明地操作，普通客户端访问广泛使用的媒体服务器通过大规模的网络，如Internet2或internet MBONE。

This proposal seeks funding for research in the design, implementation, and instrumentation of newmethods for scalable wide-area on-demand reliable digital (SWORD) streaming. The larger goal of theresearch is to enable new streaming media applications, such as immediate access to a television showwhenever a client anywhere would like to view it, by devising new practical cost-effective methods for on-demand real-time streaming of very popular streaming media content. The key aspects of the research tobe undertaken are:1. The development of innovative practical new reliable multicast techniques that optimize client streamsharing to conserve server and network bandwidth, improve bandwidth cost-sharing, and maximizesystem scalability.2. The design of delivery techniques that work over the Internet or over satellite/cable networks, or anycombination of these network technologies.3. The development of new metrics and models to determine which popular streams or partial streamsshould be cached at regional (or proxy) servers in order to minimize delivery cost for the data.4. The development of new network instrumentation facilities for the streaming media delivery protocolsthat enable deep understanding of the impact of network events and conditions on the performance ofthe protocols.5. The use of the new on-line network instrumentation facilities to develop new streaming methods thatoptimally adapt to current network conditions.6. The development of a novel testbed that allows experimentation with alternative new reliable multicastmethods as well as alternative algorithms for caching streaming content closer to the clients, uses thenew instrumentation facilities, and operates seamlessly and transparently in a live environment withordinary clients accessing widely used media servers over large-scale networks such as Internet2 or theInternet MBONE.