Study on congestion control in internet

After evolution for decades, large bandwidth-delay product became to an obvious character of internet. the content it transfers has changed profoundly too. This changes brought the developments of congestion control technology. In this article, the study on congestion control in Internet were divided into congestion control based on measurement, improvement on AIMD mathematic models and congestion control based on control theory. The actuality and development of current congestion control studies were summarized in the three sorts. Finally the emphases and directions for further study were proposed.