Intelligent re-routing method and device based on congestion sensing in software-defined network

Abstract

The invention discloses an intelligent re-routing method and device based on congestion sensing in a software-defined network. The method comprises the following steps: a network monitoring module ofa control layer collects and computes a network state of a data layer at fixed time after the initialization; a congestion detection module of the control layer performs fuzzy evaluation on two indexes of link used load ratio and link load change rate so as to obtain a fuzzy evaluation value of the current link congestion quality, and obtaining the congestion quality fuzzy evaluation value of thispath according to the average congestion degree of all links on the path; after the congestion detection module of the control layer accomplishes the congestion quality evaluation of all alternativepaths, a path selection module and the congestion detection module establish connection with the network monitoring module to acquire a path selecting parameter, thereby selecting the optimal path ofthe data stream transmission. The invention provides an intelligent congestion-avoidance routing selection method for the data stream in the network, and the network performance and the user quality of service experience are effectively improved.

Description

technical field [0001] The present invention relates to the communication field, in particular to a congestion-aware intelligent rerouting method and device in a software-defined network. Background technique [0002] With the continuous emergence of new networks such as the Internet of Things, mobile Internet, and cloud computing networks, streaming media data has shown explosive growth, and network link congestion has become increasingly serious. The distributed architecture of traditional networks lacks control over network resources and global information, so it is difficult to efficiently utilize network resources. The software-defined network architecture breaks the design concept of traditional network systems and separates the centralized control plane from the distributed data plane. It can not only realize the global optimization and centralized control of the control plane, but also realize high-performance network forwarding capabilities. The software-defined ne...

AI Technical Summary

Problems solved by technology

Ignoring the characteristics of network status changes, the selection of backup paths is too rigid, and the network effects brought about by rerouting paths are not considered

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