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A transmission control method based on multi-level congestion feedback in DCN

A technology of transmission control and sender, which is applied in the field of transmission control based on multi-level congestion feedback in DCN, which can solve the problems of insufficient sensitivity of delay constraints and achieve the effect of improving network throughput and reducing completion time

Active Publication Date: 2019-03-01
CENT SOUTH UNIV +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

D. 2 TCP not only increases the number of data streams completed within the delay constraint, but also coexists well with traditional TCP, but due to the insufficient sensitivity of delay constraints, there is still a lot of room for improvement in performance

Method used

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  • A transmission control method based on multi-level congestion feedback in DCN
  • A transmission control method based on multi-level congestion feedback in DCN
  • A transmission control method based on multi-level congestion feedback in DCN

Examples

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Embodiment 1

[0042] see figure 1 , figure 1 It is a flowchart of the present invention: a method for transmission control based on multi-level congestion feedback in DCN, the process is as follows:

[0043] Initialization; set the size of the initial sending window cwnd to 1, set the first-level queue marking threshold Threshold1 to 20, set the second-level queue marking threshold Threshold2 to 65, set both the congestion flag bits ECT and CE to 0, and the slow start phase Flag ST is set to 0;

[0044] After the sender receives all the acknowledgment packets ACK in the current sending window, it calculates the number of the first-level congestion flag ECT and the second-level congestion flag CE set to 1 in all the acknowledgment packets ACK. Secondary congestion levels α and β;

[0045] α=m / cwnd

[0046] β=n / cwnd

[0047] Among them, m and n are the number of the first-level congestion flag ECT and the second-level congestion CE set to 1 in all acknowledgment packets ACK in the curren...

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Abstract

The invention discloses a transmission control method for a DCN (Data Center Network) based on multilevel congestion feedback. The method comprises the steps of setting a switch cache queue length threshold which comprises a first-level queue marking threshold 1 and a second-level queue marking threshold 2; monitoring a current queue length by each switch in a transmission path when multiple sending parties send data concurrently; comparing the current queue length with the first-level queue marking threshold 1 and the second-level queue marking threshold 2, and feeding back a current network congestion state; reducing a window increasing speed in a slow start stage according to first-level congestion feedback; and timely logging out the slow start stage, and entering a congestion avoiding stage according to the second-level congestion feedback. According to the method, the throughput breakdown phenomenon resulting from the fact that the window increasing speed is too fast in the slow start stage when DCN concurrent transmission is carried out can be effectively avoided. The network throughput is greatly improved, and the integrated performance of a network application is improved.

Description

technical field [0001] The present invention designs a transmission control method based on multi-level congestion feedback in a DCN (Data Center Network). Background technique [0002] In recent years, with the rapid development and popularization of network applications such as online search, social networking, and e-commerce, more and more online application systems have been migrated to data centers, using large-scale computing and storage resources to provide users with various network service. In the face of huge user visits, as the computing and storage core of the next-generation Internet, the carrying capacity and service performance of the data center have been severely challenged. [0003] Because the data center network has the characteristics of ultra-high bandwidth and ultra-low delay, which is very different from the traditional wide area network, the application effect of traditional TCP in the data center network is very poor. Highly concurrent synchronous...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/825
CPCH04L47/263
Inventor 黄家玮徐文茜王建新郝晓强张华健有启迪
Owner CENT SOUTH UNIV
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