Multicast Congestion Control Protocols

组播是一种将同一数据传送到多个目的地的网络服务。许多新兴的网络应用，如多参与者视频会议、多方互动游戏、远程学习、组协作和资源定位，都可以从这项服务中受益匪浅。 在这个项目中，研究人员将开发用于IP组播的拥塞控制协议，以支持分层数据在异构动态网络中向大量接收器的可扩展和有效传播。研究人员将研究使用一套集成的三个不同的机制-每组反馈为基础的传输调整，选择性参与，菜单适应-来解决一般的组播拥塞控制问题。这些机制将在不同的时间尺度上运作，并将适应的责任分配给网络中的不同实体。研究人员将通过实验评估大规模网络环境中协议的可扩展性和性能，其中多播会话与其他单播和多播会话共享网络，接收器加入和离开网络，瓶颈链路和带宽随时间波动。研究人员将在可编程路由器的网络试验床中实现基于Internet交换架构（IXA）的组播拥塞控制协议。研究的结果将是一个家庭的算法，协议和原型实现，这将显着推进设计组播拥塞控制协议的艺术状态。

Multicast is a network service for delivering the same data to multiple destinations. A wide range of emerging network applications - such as multi-participant video conferencing, multi-party interactive games, distance learning, group collaboration, and resource location - can greatly benefit from this service. In this project, the researchers will develop congestion control protocols for IP multicast to support scalable and efficient dissemination of layered data to a large number of receivers in heterogeneous, dynamic networks. The researchers will investigate the use of an integrated set of three distinct mechanisms - per-group feedback-based transmission adjustment, selective participation, and menu adaptation - to solve the general multicast congestion control problem. These mechanisms will operate at different time-scales and distribute the responsibility of adaptation to different entities in the network. The researchers will experimentally evaluate the scalability and performance of protocols in a large-scale network environment where the multicast session shares network with other unicast and multicast sessions, receivers join and leave the network, and the bottleneck links and bandwidths fluctuate over time. The researchers will implement multicast congestion control protocol in the network testbed of programmable routers, based on the Internet eXchange Architecture (IXA). The outcome of the research will be a family of algorithms, protocols, and prototype implementations that will significantly advance the state of art in designing multicast congestion control protocols.