Traffic statistics method in software-defined network based on wildcard

A software-defined network and traffic statistics technology, applied in the field of network traffic statistics, can solve problems affecting network packet forwarding and routing updates, long switch processing delays, large control link bandwidth, etc., to reduce control link bandwidth and resource usage The effect of low rate and low bandwidth usage

Active Publication Date: 2021-09-24
SUZHOU INST FOR ADVANCED STUDY USTC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both of these methods consume a large amount of control link bandwidth and cause long switch processing delays
This will further affect packet forwarding and routing updates throughout the network

Method used

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  • Traffic statistics method in software-defined network based on wildcard
  • Traffic statistics method in software-defined network based on wildcard
  • Traffic statistics method in software-defined network based on wildcard

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Embodiment

[0037] like figure 1As shown, a software-defined network traffic statistics method based on wildcards, the method uses wildcards as a unit to calculate the flow information that needs to be collected on each switch on the controller side, and sends corresponding traffic information to each SDN switch according to the calculation results Read-State request, each Read-State request contains a wildcard (wild-card), which can match multiple flows with common characteristics passing through a switch; each switch packs part of the traffic information according to the wildcard field in the request, and Send it to the controller; the controller obtains the network-wide traffic statistics after summarizing, and based on this, it can perform fine-grained packet forwarding, routing update and other tasks to improve the service quality of the network.

[0038] Wildcards specify relatively coarse flow granularity. Each wildcard can match flows with the same characteristics passing through ...

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Abstract

The invention discloses a flow statistics method in a software-defined network based on wildcards. A controller uses wildcards as a unit to divide flows on SDN switches in a software-defined network into flow sets; the optimization goal is to minimize the flow statistics cost of each SDN switch , to calculate the information of the flow set to be collected on each SDN switch; according to the information of the flow set to be collected on each SDN switch, send a traffic statistics request to all SDN switches, and each request specifies a wildcard on a certain SDN switch; the SDN switch Analyze the wildcard field according to the traffic statistics request, pack the traffic information of all flows matching the wildcard, generate a response packet and send it to the controller; the controller generates traffic statistics information according to the collected response packets of all SDN switches. The present invention can assign corresponding statistical tasks to each switch according to the current network flow status and resource status, thereby avoiding the congestion of the control channel.

Description

technical field [0001] The invention belongs to the technical field of network traffic statistics, and in particular relates to a wildcard-based traffic statistics method in a software-defined network (Software Defined Network, SDN). Background technique [0002] Due to various limitations of the existing network architecture, the software-defined network (Software Defined Network, SDN) was born. SDN is a software-based network architecture, and its core idea is the separation of network data forwarding plane and control management plane. In traditional IP networks, network transmission devices (such as routers) need to be responsible for data forwarding functions and control logic functions respectively, so the control and management logic of traditional networks is very complicated. In a software-defined network, the separation of the control plane and the data plane simplifies the functions of the network transmission equipment. It only needs to be responsible for forwar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/801H04L12/803H04L12/851H04L12/721
CPCH04L45/38H04L47/10H04L47/125H04L47/2441H04L47/2483
Inventor 徐宏力杨旭炜余卓隆黄刘生
Owner SUZHOU INST FOR ADVANCED STUDY USTC
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