A TCP Congestion Control Algorithm Based on Adaptive Parameters

Abstract

The invention discloses a TCP congestion control algorithm based on adaptive parameters, comprising the following steps: in the network data transmission process, as the number of congestion windows increases, the network enters the congestion avoidance stage from the slow start stage; if in the congestion avoidance stage When timeout retransmission occurs, it is judged that the network is congested, and the TCP congestion control algorithm based on adaptive parameters is started to dynamically control the size of the congestion window and the slow start threshold by setting the adaptive parameters; by detecting whether the congestion window is in the Within the threshold interval, it is judged whether the network has recovered from congestion, and if not, the congestion control algorithm will continue to be executed until the network recovers from congestion. The self-adaptive parameter method adopted by the present invention enables the network to adaptively adjust the congestion window value and the slow start threshold value in combination with the current actual situation, so that the network can get rid of congestion faster, and at the same time improve the utilization rate of the network and avoid The network is shaking violently.

Description

technical field [0001] The invention relates to the technical field of computer network transmission control protocols, in particular to a TCP congestion control algorithm based on adaptive parameters. Background technique [0002] According to statistics, if the retransmission event occurs in the web server, overtime retransmission accounts for 70%, and in common video browsing websites, overtime retransmission also accounts for about half. In the specific data transmission process, network congestion will seriously affect the performance of data transmission, and the processing strategy for overtime retransmission largely determines the transmission performance of the network. [0003] In the prior art, there are already many technical solutions for network congestion control. For example, the application number is: CN201310002460.3 discloses a TCP congestion control method based on the throughput change rate ECN mechanism. Since the main operation of this method is in On...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the adjustment strategy of relevant parameters in the overtime retransmission algorithm in the prior art is relatively fixed, and it is impossible to perform congestion control in combination with the current actual situation of the network, and, in actual situations, when the network congestion phenomenon When it occurs, it is usually not a timeout or loss of data at one sender, but may occur at multiple senders. At this time, according to the existing congestion control strategy, the value of these send windows will be reduced to a lower level. And start to execute the slow start algorithm; it takes a certain amount of time for the congestion window of these senders to increase from the current low level to the processing capacity of the network. During this relatively long period of time, network resources are not fully utilized, resulting in waste

Images