摘要： 基于分层组播中公平速率分配算法实施过程中存在的问题以及分层组播协议策略中同步点的优化问题，提出了将主动队列管理算法REM作为对端系统的辅助加入到分层组播流量控制中，将分层组播同步点策略、满足Max-Min公平性要求的速率分配算法以及基于REM的显式拥塞指示技术有机地结合起来，设计了一种基于速率的、由接收者和发送者混合驱动的分层组播流量控制方案。仿真实验结果表明该方案使得分层多速率组播在保证会话内、会话间公平性的前提下，提高了流量控制机制的高效性和对网络状态适应的灵敏性。

关键词: 分层组播, Max-Min公平性, REM, 流量控制

Abstract: Based on the problems of the implementation for Max-Min fair rate allocation algorithm in layered multicast and the problems of synchronization points optimization in layered multicast protocol strategy, a REM-assisted scheme of traffic control is devised. The synchronization points strategy of layered multicast, the rate allocation algorithm satisfying Max-Min fairness and the explicit congestion notification technique based on REM are combined together in this scheme. The results of simulation experiments show that this scheme can improve the effectiveness of layered multicast’s traffic control mechanism and the sensitivity to the changes of the network condition with the precondition of intra-session fairness and inter-session fairness guaranteed.

Key words: Layered multicast, Max-Min fairness, REM, Traffic control