TCP congestion control method and system

Abstract

The invention relates to a TCP congestion control method and system. The method comprises the following steps of: monitoring the delay numerical value of a network path, and acquiring the delay numerical value of the monitored current network path, so that the delay numerical value of the current network path is obtained; according to the delay numerical value of the current network path, predicting the transmission speed of sent data of the current network path at the predetermined time; and, according to the transmission speed of the sent data of a network, adjusting the size of a congestion control window of a current network, and sending data according to the adjusted size of the congestion control window, so that network congestion is avoided. By means of the TCP congestion control method disclosed by the invention, the network congestion degree change condition can be tracked dynamically in real time; real-time response, control and adjustment are carried out; and in particular, the performance of the network is well improved in a network environment, where the multimedia data flow plays a leading role.

Description

technical field [0001] The present invention relates to the technical field of data communication, in particular, the present invention relates to a TCP congestion control method and system. Background technique [0002] TCP (Transmission Control Protocol) is a connection-oriented, reliable, byte-stream-based transport layer communication protocol defined by RFC 793 of the IETF. The TCP congestion control mechanism adjusts the size of the sent data according to the network transmission performance and status to avoid network congestion and collapse. [0003] The congestion control mechanism of the early TCP protocol is controlled by window-based flow control. Since the size of the window is variable during the connection between the two communicating parties, both communicating parties can dynamically modify the window size through negotiation. The way the receiver manages the data sent by the sender can do the following: prevent the overflow of the data buffer space avail...

AI Technical Summary

Problems solved by technology

The disadvantage of the early TCP protocol congestion mechanism is: this control method is a local control method, which only considers the receiving ability of the receiving end, and does not take into account the transmission ability of the network. Therefore, in practice, this control method cannot be effectively Avoid the occurrence of congestion collapse

The disadvantage of this control method is that although the control method takes into account the transmission capacity of the network, the inferred most suitable window still cannot meet the actual situation of the current network. Therefore, this control method cannot effectively avoid congestion in practice. occurrence of crash

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