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为了克服异步传输模式(ATM)网络不确定时延和饱和非线性的影响,基于比例控制和滞后超前控制方法研究可用比特率(ABR)服务流量控制器设计问题,给出了控制幅值约束和缓冲区容量约束下系统满足ABR流量控制要求的条件,提出了满足这些条件的比例控制器和滞后超前控制器的设计方法。该方法能使ABR流量控制系统在网络传输时延不确定时,有效控制网络中瓶颈节点缓冲区的队列长度,同时能够及时响应ABR可用带宽的变化,从而避免拥塞和丢包的发生,使链路带宽得以充分利用。
In order to overcome the influence of uncertain delay and saturation nonlinearity in Asynchronous Transfer Mode (ATM) networks, this paper studies the design of available bitrate (ABR) service flow controller based on proportional control and lagging advanced control methods, and gives the control amplitude constraints and The system meets the requirements of ABR flow control under buffer capacity constraints, and a design method of proportional controller and lagging advanced controller to meet these conditions is proposed. This method can make the ABR flow control system effectively control the queue length of the bottleneck node buffer in the network when the network transmission delay is indefinite and at the same time can timely respond to the change of the available bandwidth of the ABR so as to avoid the occurrence of congestion and packet loss, Road bandwidth can be fully utilized.