FPI-PD-MCC：一种基于模糊PI-PD的组播拥塞控制算法

针对TFMCC算法速率振荡大的局限性，提出了一种基于模糊PI—PD的组播拥塞控制算法（FPI—PD—MCC：Fuzzy Logic—based Proportional Integral-proportional Derivatire Multicast Congestion Control Algorithm）。在FPI—PD—MCC中，对发送方的速率调整步长进行了平滑，在路由器中引入了PI控制，并利用模糊逻辑计算参数α，从而自动调节丢包概率以缓解拥塞。仿真结果表明，该算法能够使队列长度稳定在期望值附近，同时保证网络吞吐量的平缓变化。

FPI-PD-MCC: A Fuzzy Logic-based PI-PD Multicast Congestion Control Algorithm

A fuzzy logic-based proportional integral-proportional derivative multicast congestion control algorithm （FPI-PD-MCC） is proposed in the paper. The algorithm adjusts its transmission rate to smooth its rate adaptation. The PI controller is introduced into the router, while the parameter of a is calculated based on fuzzy logic, which could regulate the loss rate automatically to alleviate the congestion situation. Simulations show that the FPI-PD-MCC algorithm could preferably maintain the queue length around a desired level, and guarantee the stability of network throughput.