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提出了一种基于速率的闭环控制机制的分析模型，推导出了可用信元速率和队列长度的计算公式及它们的极值．计算机数值计算结果表明：理论推导结果与模拟结果相符，且在应用基于速率的拥塞控制机制时，通过恰当地选取控制参数，可以获得较高的网络资源利用率和较低的存储器要求．
An analysis model of the closed-loop control mechanism based on rate is proposed, and the formula of available cell rate and queue length and their extreme values are derived. Computer numerical results show that the theoretical derivation results are in good agreement with the simulation results, and when the rate-based congestion control mechanism is applied, the network resource utilization rate and the low memory requirement can be obtained by properly selecting the control parameters.