ABR流量的模糊免疫PID控制

ABR Traffic Control Using Fuzzy Immune-PID Controller

针对高速通信网络的拥塞问题,设计模糊免疫PID控制器,对网络中的ABR速率进行实时、在线调节。提出了确保最小信元速率的算法。所设计的控制算法不但克服了ABR带宽、用户数量及传播时延等不确定因素对网络性能造成的影响,而且保证了带宽的公平分配及链路的充分利用。仿真结果表明系统具有很好的快速性、鲁棒性及适应性,网络的服务质量得到了保证。

For the congestion of high-speed communication networks, a fuzzy immune-PID controller was designed to adjust the rates of ABR on-line in ATM networks. And an algorithm was proposed to guarantee the minimum cell rate. The control algorithm designed can overcome the adverse effect caused by uncertainties such as the number of users, the ABR bandwidth and propagation delays etc and the fairness and full utilization of bandwidth are also ensured. Simulation results show that the control system is rapid, adaptive, robust, and the quality of service is guaranteed meanwhile.