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为解决PI(Proportional Integral)算法收敛速度慢的问题,结合果蝇优化算法提出一种新的PI主动队列管理算法(PIFF).阐述PI主动队列管理机制及丢包率计算方法,结合队长和到达速率定义丢包策略,利用果蝇优化算法刻画了数据包瞬时状态.通过NS2和Matlab进行仿真实验,深入分析了影响该算法的关键因素,对比研究了该算法与其它算法之间的性能状况.研究结果表明:在长期TCP会话数下PIFF能够减少数据包排队时延,有效缓解网络拥塞.
In order to solve the problem of slow convergence rate of PI (Proportional Integral) algorithm, a new PI active queue management algorithm (PIFF) is proposed in combination with Drosophila optimization algorithm.It explains PI active queue management mechanism and packet loss rate calculation method, The rate of packet loss is defined, and the instantaneous state of packet is described by using Drosophila optimization algorithm.The key factors affecting the algorithm are analyzed by NS2 and Matlab, and the performance of the algorithm is compared with other algorithms. The results show that PIFF can reduce packet queuing delay and alleviate network congestion effectively in long-term TCP sessions.