A Congestion Control Method for Wireless Communication Network Transmission Link Based on Self-tuning PID Algorithm
Due to the large amount of data and complex topology in wireless communication networks,the congestion control effect of transmission links is poor.To achieve effective control of link congestion,a wireless communication network transmis-sion link congestion control method based on self-tuning proportional-integral-differential(PID)algorithm is proposed.Ad hoc on-demand distance vecter routing(AODV)protocol is used as a constraint for link congestion control to ensure the scheduling format of data in the transmission link.A wireless communication network transmission link congestion controller is designed by a linear PID controller to flexibly adapt to different congestion control requirements.In response to the problem of poor pa-rameter setting accuracy in linear PID controllers,a self-tuning PID algorithm is introduced.By comparing the duty cycle and threshold,the detection and prediction results of transmission link congestion state are obtained.The link capacity is used to calculate the congestion control quantity and is fed back to the self-tuning PID algorithm congestion controller.Through slow start,congestion avoidance,and congestion relief operations,the congestion control task is completed.The experimental re-sults show that the average length of the transmission link queue in the wireless communication network is 29.2 Mbit,the aver-age proportion of links is 1.9％,and the average transmission rate is 8.1 MiByte/s,which verifies the effectiveness of the de-signed method.
AODV protocolwireless communication networktransmission linkcongestion control
万方数据
维普
