TCP congestion control method based on SDN network

A congestion control and network congestion technology, applied in the research field of network congestion, can solve the problems of too slow, TCP misjudgment and false response, too fast growth, etc., to achieve the effect of improving transmission efficiency

Active Publication Date: 2016-11-09
GUANGZHOU HAIGE COMM GRP INC
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  • Summary
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) TCP judges congestion through the repeated confirmation of data segments and the RTP timeout mechanism. In wireless networks, most packet loss problems are not caused by network congestion, so TCP is prone to misjudgment and misresponse problems. ;
[0005] (2) After TCP is started, the source end increases the congesti

Method used

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  • TCP congestion control method based on SDN network
  • TCP congestion control method based on SDN network
  • TCP congestion control method based on SDN network

Examples

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Embodiment

[0054] like figure 1 As shown, the present embodiment is based on the TCP congestion control method of the SDN network, collects real-time network delay, delay jitter, available network bandwidth, network congestion status and information on whether the target is reachable through the SDN controller, and sends these information to the needs The adjusted TCP data flow; each TCP data flow to be adjusted is adjusted according to the corresponding adjustment target; the control method is specifically:

[0055] S1. The SDN controller sends the network delay and network available bandwidth information to the TCP data flow, and the TCP data flow adjusts the sending window size according to the bandwidth-delay product;

[0056] In step S1, the specific method for the TCP data flow to adjust the size of the sending window according to the bandwidth-delay product is as follows:

[0057] The MTU in the TCP data stream is determined, that is, the size of each datagram is basically unchan...

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PUM

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Abstract

The invention discloses a TCP congestion control method based on an SDN network. The method comprises the steps: enabling an SDN controller to collect real-time network time delay, time delay jitter, usable network bandwidth, network congestion conditions and information whether a target is reachable or not, and transmitting the above information to to-be-adjusted TCP data flows; and respectively adjusting the to-be-adjusted TCP data flows according to the corresponding adjustment targets. The method can quickly sense the network time delay, congestion condition, bandwidth and error codes through interaction with the SDN controller. Especially for a high-time-delay and high-error-rate wireless network environment, the method can discriminate air interface package loss and network congestion package loss quickly and accurately, enables a TCP protocol to be able to quickly sense the network condition, and quickly adjusts the congestion control mechanism of the TCP protocol, thereby improving the transmission efficiency of the TCP protocol.

Description

technical field [0001] The invention relates to the research field of network congestion, in particular to a TCP congestion control method based on an SDN network. Background technique [0002] In recent years, the explosive growth of the Internet has led to the emergence of a large number of various network applications, the amount of data on the network is increasing, and the load on the network is getting heavier, which leads to congestion. TCP is currently the most widely used transmission protocol in the Internet, and the congestion control algorithm used in TCP is an important factor to ensure the stability of the Internet. TCP runs on an end-to-end virtual connection, mainly based on congestion control to provide reliable datagram transmission in unreliable networks. [0003] TCP was originally designed for wired networks, where network congestion is considered to be the main cause of packet loss and retransmission timer timeout (RTO, Retransmission TimeOut). In addi...

Claims

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Application Information

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IPC IPC(8): H04W28/02H04W28/10H04W80/06
Inventor 赵伟徐飞江俊锋常利平王浩
Owner GUANGZHOU HAIGE COMM GRP INC
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