TFAMCC:TCP友好的自适应分层多播拥塞控制机制

满足接收端异构性的分层多播传输机制,源端一般只用于编码及各层数据流的传输,而拥塞控制主要在接收端来完成。这里提出一种源端与接收端协同作用共同完成多播的拥塞控制机制。源端根据接收端的反馈调节多播层次数目及各层传输速率,接收端根据TCP吞吐量模型计算本地允许带宽,进行层次的接收及形成对源端调节的反馈。经试验证明,此机制具有TCP友好性、接收端带宽充分利用及良好的可扩展性。

TFAMCC:TCP-friendly Adaptive Multi-layered Multicast Congestion Control

Generally,congestion control is handled at receivers in most of layered multicast mechanisms.In this paper,we present a protocol model to handle congestion control through source and receivers together.Source adjusts the number and the rate of layers in terms of feedback from receivers.Receivers calculate local bandwidth through TCP model and form feedback used in source.Experimental results show that TFAMCC can not only smoothly adjust sending rate to satisfy the requirement of receivers,but also assure TCP-friendliness and scalability.