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Congestion control method and device

A technology of congestion control and sending window, which is applied in the field of wide area network network optimization, and can solve problems such as inability to quickly and fully utilize bandwidth, low bandwidth competitiveness, and insufficient bandwidth adaptability, etc.

Active Publication Date: 2016-02-10
BEIJINGNETENTSEC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the detection mechanism based on the queuing delay of TCPVegas is not perfect enough, it is easy to cause misjudgment, and there is an unnecessary reduction of the sending window, which leads to the low bandwidth competitiveness of the stream transmitted using the TCPVegas algorithm
Compared with TCPVegas, FastTCP's detection mechanism based on queuing delay is more perfect and more accurate, but its adaptability to bandwidth is not good enough, especially in a large bandwidth environment, it cannot quickly and fully utilize bandwidth

Method used

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  • Congestion control method and device

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Embodiment 1

[0076] Embodiment 1 of the present invention provides a congestion control method, such as figure 2 As shown, the method includes the following steps:

[0077] Step 101: within a unit time period, according to the transmission control protocol TCP data transmission rate, determine the network condition feedback factor and the sensitivity factor of the transmission window adjustment;

[0078] Specifically, in this step, the TCP data transmission rate V1 can be measured in real time by the WAN optimization device within the unit period t; the length of the unit time period t here can be set as required, and there is no limitation here;

[0079] The described sending window adjustment sensitivity factor determined according to the TCP data sending rate includes:

[0080] Determine the bandwidth gear corresponding to the TCP data transmission rate V1, and search for a preset mapping relationship between the bandwidth gear and the weight value according to the bandwidth gear to o...

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Abstract

The invention discloses a congestion control method. The congestion control method comprises the following steps: determining a network condition feedback factor and a sending window adjustment sensitivity factor according to the data sending rate of a transmission control protocol TCP in a unit time period; and determining the size of a congestion sending window according to the network condition feedback factor and the sending window adjustment sensitivity factor, and controlling the data sending rate of the TCP according to the determined congestion sending window. The invention further discloses a congestion control device.

Description

technical field [0001] The invention relates to wide area network network optimization technology, in particular to a congestion control method and device. Background technique [0002] From the invention of Transmission Control Protocol (TCP, TransmissionControlProtocol) to the present, there have been many improvements in congestion control algorithms, including TCPTahoe, TCPReno, TCPNewReno, TCPVegas, TCP Selective Acknowledgment (TCPSack, TCPSelectiveacknowledgment), Display Control Protocol (Xcp, TCPeXplicitControlProtocol ), scalable TCP (STCP, ScalableTCP), high-speed TCP (HighSpeedTCP), accelerated TCP (FastTCP), etc. Most mainstream operating systems use TCPNewReno or its derivative algorithms. Overall, congestion control algorithms can be divided into algorithms based on packet loss detection and algorithms based on queuing delay detection. The algorithm based on packet loss detection believes that packet loss is an indication of network congestion. Generally, whe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/807H04L47/27
Inventor 刘立功李继明
Owner BEIJINGNETENTSEC