基于自整定PID算法的无线通信网络传输链路拥塞控制方法  

A Congestion Control Method for Wireless Communication NetworkTransmission Link Based on Self-tuning PID Algorithm

作　　者：佟磊 TONG Lei(Beijing Rehabilitation Hospital Affiliated to Capital Medical University,Beijing 100144,China)

机构地区：[1]首都医科大学附属北京康复医院,北京100144

出　　处：《微型电脑应用》2024年第8期24-28,32,共6页Microcomputer Applications

基　　金：北京市自然科学基金面上项目(5311021)。

摘　　要：由于无线通信网络数据量大、拓扑结构复杂,导致传输链路拥塞控制效果差,为实现对链路拥塞现象的有效控制,提出基于自整定比例-积分-微分(PID)算法的无线通信网络传输链路拥塞控制方法。以无线自组网按需平面距离向量路由(AODV)协议作为链路拥塞控制的约束条件,保证传输链路中数据的调度格式。利用线性PID控制器设计无线通信网络传输链路拥塞控制器,灵活适应不同的拥塞控制需求。针对线性PID控制器参数设置精度较差的问题,引入自整定PID算法,通过计算占空比与阈值比对,得出传输链路拥塞状态的检测与预测结果。考虑链路容量计算拥塞控制量并反馈至自整定PID算法拥塞控制器,通过慢启动、拥塞避免、拥塞解除等操作完成拥塞控制任务。实验结果表明,无线通信网络中传输链路队列长度的平均值为29.2 Mbit,链路占比平均值为1.9%,平均传输速率为8.1 MiByte/s,验证了所设计方法的有效性。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 transmission 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 parameter 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 results show that the average length of the transmission link queue in the wireless communication network is 29.2 Mbit,the average proportion of links is 1.9%,and the average transmission rate is 8.1 MiByte/s,which verifies the effectiveness of the designed method.

关 键 词：AODV协议 无线通信网络 传输链路 拥塞控制 

分 类 号：TN929[电子电信—通信与信息系统]