Network-supported rate control mechanism for multicast streaming media
Network-supported rate control mechanism for multicast streaming media
复制标题
网络支持的组播流媒体速率控制机制
DOI：
10.1109/saint.2001.905176
复制
发表时间：
2001
期刊：
影响因子：
--
通讯作者：
T. Aoyama
中科院分区：
文献类型：
--
作者：
K. Nakauchi;H. Morikawa;T. Aoyama
采用分层信源编码的分层多播使得实时流媒体能够在诸如因特网之类的异类网络上高效地分发。在分层组播中，由于在优先级较高的层中的分组丢失会导致接收质量的更大降级，因此需要进行速率控制来快速应对拥塞。此外，分层组播的速率控制也是必需的，以确保在拥塞链路上竞争的分层组播会话之间公平地分配带宽，而与其开始时间无关。提出了一种新的分层组播速率控制方案，称为网络支持的分层组播(NLM)。在NLM中，分布在网络中的路由器支持速率控制。NLM在具有高优先级的层上避免分组丢失，并通过过滤和信令实现公平的带宽分配。路由器在检测到拥塞或通过信令通知不需要该层时，会过滤优先级较低的层。仿真结果表明，与接收机驱动的码率控制相比，NLM具有明显的优势。
Layered multicasting with layered source coding enables the efficient distribution of real-time streaming media over heterogeneous networks such as the Internet. In layered multicast, rate control is required to cope with congestion quickly because packet losses in a layer with higher priority lead greater degradation of received quality. In addition, rate control for layered multicast is required to assure fair bandwidth allocation among competitive layered multicast sessions at a congested link independent of their start time. We present a novel rate control scheme for layered multicast, called Network-supported Layered Multicast (NLM). In NLM, routers distributed within the network support rate control. NLM avoids packet losses on a layer with high priority and achieves fair bandwidth allocation by filtering and signaling. A router filters a layer with low priority when it detects congestion, or when it is informed that the layer is needless by signaling. Simulation results show NLM offers significant advantages compared with receiver-driven rate control.