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随着计算机网络的流媒体系统在日常工作和生活中应用越来越广泛,流媒体数据传输和网络带宽之间的矛盾也日益剧烈和明显。在两者都已经固定的情况下,就需要应用合适的网络传输策略,有效利用媒体流的特点和网络资源,传输流媒体数据流。本文重点研究了拥塞控制策略中的分层策略,针对现在的分层策略中各层之间有着优先级不同的限制、灵活性不高的缺陷,提出了一种先分层后编码传输的分层组播策略,并给出了较详细的试验方案和实现方法,最后对该策略的特点进行了讨论。
With the application of streaming media system of computer network in daily work and daily life more and more widely, the contradiction between streaming media data transmission and network bandwidth is more and more obvious. When both are fixed, a suitable network transmission strategy needs to be applied to effectively utilize the characteristics of the media stream and the network resources to transmit the streaming media data stream. This dissertation focuses on the layering strategy of congestion control strategy. In view of the limitation of different priority levels and the lack of flexibility between layers in the current layering strategy, Layer multicast strategy, and gives a more detailed test program and implementation method, and finally discusses the characteristics of the strategy.