关键词: 队列管理, 随机早期检测, 非线性, 平均队列长度, 平均吞吐量, NS2

Abstract: Active queue management is a focus of current research. Random Early Detection (RED) is one kind of classical queue management algorithms. Linear RED is simple and easy to calculate; however, when average queue size is near to the minimum and maximum threshold, the loss rate is unreasonable. After verifying the nonlinear character between average queue size and packet loss rate, an improved RED algorithm named JRED was presented. The simulation on NS2 shows that the average throughput is improved, and the packet loss rate is decreased. With the JRED algorithm, the stableness and reliability of network are enhanced.

Key words: queue management, Random Early Detection (RED), nonlinear, average queue size, average throughput, Network Simulator version 2 (NS2)