多速率多播拥塞控制研究

多播传输所面临的最主要的问题就是提供一种可扩展的拥塞控制机制，既能与TCP传输相适应，同时能克服网络的异构性，为端到端的网络接收者进行多播数据传递。多速率多播拥塞控制不仅解决了多播的可扩展性问题，而且提高了异构网络带宽的利用率，在Internet多播应用领域倍受关注。对多速率分层多播拥塞控制的性能进行了评价后，着重研究了与性能有关的关键问题和解决方法。通过对现有分层多播拥塞控制的代表性算法进行性能分析和比较，指出了未来的工作方向。

Advances in multi-rate multicast congestion control

One of the significant challenges associated with multicast delivery to large audiences is providing a scalable congestion control mechanism that is compliant with TCP yet addresses heterogeneity in end-to-end bandwidth across receivers. Multi-rate multicast congestion control (MR-MCC) can resolve the scalability problem for Internet environment and achieve high utilisation of heterogeneous network bandwidth. Recently, the technique of layered multicast has been employed as a strategy capable of accommodating diverse sets of receivers. In this paper, the key issues related to multi-rate layered multicast congestion control are discussed, and then some representative work is outlined. Finally the development direction and future work are also analysed.