ATM网络ABR业务拥塞控制算法的PI调节器实现

A Congestion Control Algorithm for the ABR Service in the ATM Network with a PI Controller

基于速率反馈的流量控制是ATM网络ABR业务标准的流量控制方案。在目前绝大多数拥塞控制方案不能用数学工具进行分析的情况下 ,本文根据经典控制理论的有关原理 ,使用一个PI控制器实现了拥塞控制算法。我们对系统进行了分析 ,证明了此时系统带宽和输入数据速率之间将是无差的 ;最后通过仿真说明了控制器参数的变化对系统的影响。

Rate-based feedback congestion control is a standard traffic management scheme for the available bit rate service in ATM networks. Since most existing algorithms cannot be analyzed by mathematical tools, this paper proposes a new algorithm with a PI controller. Using the classic control theory, we analyze the performance of the system and prove that there is no error between the bandwidth and the input data rate. At last, the result of a simulation explains the impact of the variation of controller parameters on the system.