TCP/AQM Network Switching Congestion Control with Input Saturation and Prescribed Performance

In this paper, a switching control method is used to study the tracking control problem of TCP/AQM network congestion. First, considering the time-varying nature of the number of sessions during network transmission, as well as the influence of UDP and http streams on TCP stream transmission in congestion control, the commonly used network transmission model is improved to be as a switching system. Next, an error transfer model is established. Considering the boundedness of the network control input, the network congestion switching controller is designed by combining input saturation, prescribed performance, backstepping technology, and adaptive technology. The designed controller has certain transient performance and steady-state performance, and enables the output of the system to track the required queue size under any switching of the number of sessions. Finally, the effectiveness of the switching controller designed in this paper is verified by simulation.