Abstract: Because there are many factors affecting the network link state, it is difficult to accurately judge the network link state and the location where congestion is about to occur, resulting in the decline of the quality for network link congestion control. A priority based mathematical modeling method for network link congestion automatic control is proposed. A heterogeneous network model combined with the current occupation and change of network interface queue buffer space is built to detect the network link congestion, and judge the network link status and the location where congestion is about to occur. Through the data request sending mechanism, the
detection results are fed back to other network nodes in time. The high priority burst packets in the network nodes are set to have absolute priority. The burst packets of the network link are divided and deflected to realize the automatic control of network link congestion. The experimental results show that the model can effectively detect the current network link congestion and control the congestion degree of the network. It has better network communication data transmission effect, blocking rate, better throughput and higher control quality.

Key words: priority, network link, automatic congestion control, mathematical modeling, burst packets, deflection operation