Congestion Control in IP Network
REN Feng Yuan LIN Chuang LIU Wei Dong (Department of Computer Science and Technology, Tsinghua University, Beijing 100084)
Combining with the evolution of congestion control mechanisms, the existed technologies for congestion avoidance and recovery in IP networks are reviewed. The unsolved problems and hot spots in subdiscipline, such as TCP flow control, end to end flow control and enhanced mechanism in intermediate nodes, are summarized, and the advantages and disadvantages of all kinds of schemes for active queue management are emphatically analyzed. Also the paper presents and discusses the drawbacks of heuristic designing combining with special simulation experiments used by most of network algorithms. Subsequently, a new approach to design and evaluate congestion control algorithm is presented based on control theory, and several interesting directions are provided.