一种基于连接的增强拥塞控制机制  

PER-FLOW SCHEDULING CONGESTION CONTROL MECHANISM IN ROUTERS

作　　者：陈依群[1] 顾尚杰[1] 诸鸿文[1] 

机构地区：[1]上海交通大学电子工程系,上海200030

出　　处：《计算机研究与发展》2000年第3期379-384,共6页Journal of Computer Research and Development

摘　　要：文中针对越来越多的网络应用不采用端到端拥塞控制机制而导致非公平占用网络带宽问题，介绍了在路由器内部实现基于连接调度的增强拥塞控制方法．路由器使用公平排队调度算法代替传统的先来先服务调度算法，可隔离和保护基于漏桶控制的网络连接．但采用基于窗口反馈拥塞控制机制ＴＣＰ连接会对数据包丢失敏感，路由器使用公平排队调度算法还需要结合相应的缓冲管理方法，才能保证ＴＣＰ连接获取公平的吞吐量．文中还讨论了基于连接的排队数据包公平缓冲丢弃的缓冲管理方法．模拟结果表明，公平排队调度算法结合文中所提出的缓冲管理方法比随机提前检测缓冲管理方法可更好地改进拥塞控制性能．With the increase of internet users and the diversification of network applications , it is necessary for router itself to improve the congestion control mechanism. In this paper, the router congestion control issue based on per-flow scheduling is investigated. By adopting the fair queuing instead of traditional FCFS service discipline, the router is able to isolate and protect leaky-bucket controlled network connections. However, to achieve fair bandwidth allocation for feedback controlled and adaptive connection such as TCP, the router needs to combine fair queuing with appropriate buffer management schemes. A new buffer management scheme of the fair buffer drop is proposed. Simulation results show that the proposed schemes can obtain better performance comparing with that of the RED buffer management.

关 键 词：拥塞控制 缓冲管理 INTERNET网 路由器 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]