一种基于窗口的多速率组播拥塞控制算法  

A window-based multi-rate multicast congestion control algorithm

作　　者：张冰[1] 刘增基[1] 原冰[1] 

机构地区：[1]西安电子科技大学综合业务网理论与关键技术国家重点实验室,陕西西安710071

出　　处：《西安电子科技大学学报》2006年第5期768-772,781,共6页Journal of Xidian University

基　　金：国家自然科学基金重大研究计划资助项目(90104012)

摘　　要：提出一种基于窗口的多速率组播拥塞控制协议WMCC.协议中各层的发送速率根据接收端的反馈进行动态自适应变化;各接收端在基层维护拥塞窗口,按照二项式算法对窗口值进行调整,并进而估计期望速率;根据期望速率订购合适的层,从而获得相应的吞吐量.仿真表明,协议具有有效提供多速率服务的能力,及良好的TCP公平性,速率平滑性和响应性.A window based multi-rate multicast congestion control（WMCC） algorithm is proposed. The sender of a multicast session changes the rate of each layer dynamically and adaptively according to the feedbacks from receivers. Each receiver maintains a congestion window on the base layer and adjusts it based on the binomial algorithm, and from the congestion window an expected rate is calculated. The receiver subscribes to appropriate layers based on its expected rate, thus obtaining a corresponding throughput. Simulations indicate that WMCC is effective in providing a multi-rate multicast congestion control, and shows good TCP-friendliness, smoothness and responsiveness.

关 键 词：组播 多速率 拥塞控制 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]