基于侦听机制的网络拥塞控制模型

The model of network congestion control based on interception mechanism

针对局域网出口经常出现拥塞的现状 ,给出了一种基于侦听机制的网络拥塞控制模型 .该模型将局域网出口状况划分成无拥塞、轻度拥塞、中度拥塞、严重拥塞四种不同的状态 .在出现中度拥塞或严重拥塞时 ,根据所记录的TCP进出流及用户自定义的分类排队策略形成优先级队列 ,实施针对性拥塞控制 ,从而保证在实施拥塞控制的同时不降低重要流量的出口带宽 .

The network congestion control model was presented based on interception mechanism. The status of LAN outgoing interface was divided into four levels: no congestion, low level congestion, middle level congestion and high level congestion. When there is middle level congestion or high level congestion, priority queue will be constructed according to the TCP traffic and the customer policy and hence to enforce specific congestion control based on the priority queue. In this way, effective congestion control was implemented without side effect on important traffic. The model has the non intrusive characteristic as to be implemented without any modification to the topology or protocols of LAN.