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congestion control system and method based on an OpenFlow technology

A technology of congestion control and control method, which is applied in the direction of transmission system, digital transmission system, electrical components, etc., can solve the problem that the network bandwidth does not take into account the link delay and cannot achieve the expected effect, and achieve the effect of alleviating network congestion

Active Publication Date: 2019-05-14
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

However, the above scheme only considers the network bandwidth and does not take into account the link delay. When there is unbearable link delay in the network, the above method cannot achieve the expected effect

Method used

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  • congestion control system and method based on an OpenFlow technology
  • congestion control system and method based on an OpenFlow technology
  • congestion control system and method based on an OpenFlow technology

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Embodiment

[0066] A congestion control system and method based on OpenFlow technology proposed in this embodiment has a dynamic bandwidth monitoring effect; an accurate delay detection method is determined by adding a timestamp tag; Delay data, dynamically update routing rules, realize efficient traffic scheduling, and greatly alleviate network congestion.

[0067] Such as figure 1 As shown, the congestion control system based on OpenFlow technology in this embodiment mainly includes a network topology perception module, a network bandwidth monitoring module, a network delay detection module, and a traffic scheduling module. The data obtained by the first three measurement modules can be fed back to the The traffic scheduling module is described, and the traffic scheduling module executes a multi-parameter traffic scheduling algorithm, thereby realizing an optimal path forwarding function and achieving efficient scheduling of traffic. At the same time, the system of this embodiment also...

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Abstract

The invention discloses a congestion control system and method based on an OpenFlow technology. The system comprises a network topology sensing module, a network bandwidth monitoring module, a networkdelay detection module, a flow scheduling module, a network visualization display module and a network configuration management module. The method mainly comprises the steps of network topology collection and calculation of the shortest path of the whole network according to a Dijkstra algorithm; Monitoring link bandwidth data in real time according to a request of OFPPortStatsRequest in the OpenFlow message, and replying the link bandwidth data in real time; Detecting the link delay in real time through the newly added timestamp label of the LLDP data packet and the newly added timestamp label of the echo message; A visual interface is displayed, and a routing rule can be changed in real time through an REST API; And if the congestion is judged to occur, scheduling the flow to a light load link through a flow scheduling module to avoid the congestion of a certain link, or else forwarding the flow according to the original path. According to the congestion control system and method, the network service can be quickly recovered, the network congestion is relieved, and the link bandwidth utilization rate is increased.

Description

technical field [0001] The invention relates to the field of congestion control of data communication networks, in particular to a congestion control system and method based on OpenFlow technology. Background technique [0002] Traditional traffic engineering relies on the TCP / IP protocol stack. With the explosive growth of network traffic, traditional methods are inefficient for congestion awareness and congestion traffic scheduling. Some methods even require modification of the protocol stack on the end system. As With the change of computer network, its performance is more and more unable to meet people's needs. [0003] In recent years, software-defined networking has become a research hotspot in the field of network communication. Its design subverts the traditional architecture of computer networks. OpenFlow, as the core protocol, makes efficient and intelligent traffic scheduling possible. The controller in the software-defined network architecture With a global view...

Claims

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Application Information

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IPC IPC(8): H04L12/721H04L12/727H04L12/729H04L12/733H04L12/801H04L45/121H04L45/122H04L45/125
Inventor 官权升廖皓琳
Owner SOUTH CHINA UNIV OF TECH
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