The Research Of Improved RED Algorithm

The congestion control mechanism of the main Internet protocol, TCP/IP, has especially important meaning to the controlling the congestion problem. Congestion control is the key factor in guaranteeing the QoS of Internet, and also is the base of all the administration controlling mechanism and application(for example, the QoS controlling and diff-Service in multimedia communication).So it has been a hotspot problem in networking technology research. The key reason that results in the network congestion lies in the overload that users (end—system) put on the network. This overload results in the increase of datagram delay, the increase of packet drop probability, the performance in application system in upper layer getting worse ,etc. At present, almost all the research focuses on TCP congestion control field and IP congestion control field.Recent research has indicated that end to end flow control of TCP can' t satisfy the increasing demand of business in the network, so the network itself should take part in the congestion avoidance and control. The best way is to let IP layer take part in the distribution of resources in the network, that is to say, congestion control mechanism is introduced into the router to supervise and prevent the congestion control mechanism is introduced into the router to supervise and prevent...