Performance analysis of link algorithm in congestion control

The non-smooth data transfer was caused by Network congestion, and good congestion control algorithm is benefit to improve the network performance. Generally, network congestion algorithms are divided into two main categories, one is the control algorithm based on the data source, and the other is the control algorithm based on link. Different algorithms have different performance link. Link algorithms such as FIFO algorithm, RED algorithm, ARED (Adaptive RED)algorithm and QVARED(Queue Variation ARED) algorithm have different features. Congestion control mechanism is analyzed from the perspective of network congestion. The evolution of several link algorithms is introduced in detail, then the performance of each algorithm is compared and analyzed. QVARED and ARED algorithm have high utilization rate of link by comparison. The processing rate of outburst flow data fluctuate more smoothly for QVARED algorithm.