Reformed passive queue management algorithm

Although passive queue management is defective, it is simpler than active queue management algorithm, so it is still widely used in Internet. In order to improve the deficiencies, the multi-dropping packets passive queue management algorithm is proposed. When the queue is full, randomly multi-dropping packets. Simulation results show that this algorithm develops the transmission performance of the network, improves the RTT fairness and speed fairness effectively, and the computation is small, so it is suitable for Internet.