一种新型的基于RED的逐节拥塞控制算法

随着Internet上各种多媒体应用的迅速发展，导致网络经常发生拥塞现象，严重影响网络传输的服务质量（QoS），现有的拥塞控制采用以TCP为核心的基于窗口技术的端到端控制，具有丢包、响应速度慢等缺陷，提出的基于RED的逐节拥塞控制算法通过对拥塞的早期检测和在相邻节点进行拥塞控制等方法，使网络能对拥塞做出快速响应，有效地克服了现有拥塞控制方法的缺陷，实验结果表明，在相同配置下，采用该拥塞控制算法的网络在吞吐率和拌动等性能上均优于端到端拥塞控制。

RED-BASED HOP-BY-HOP CONGESTION CONTROL

The frequent occurrence of congestion in the current Internet has led many researchers to re-examine the issue of congestion control. A novel RED-based hop-by-hop congestion control mechanism is presented in this paper, in which the outgoing flow is dynamically adjusted at the node, using feedback information provided by its downstream node. The feedback information is sent when a node detects incipient congestion early using an enhanced RED algorithm. The mechanism is implemented in a testbed and its performance is compared with that of an equivalent end-to-end control mechanism by simulation. The simulation results show that the hop-by-hop mechanism eliminates packet drops, improves the total throughput, and decreases jitter compared with the end-to-end control under the same conditions.