SDN (Software Defined Network)-based multi-link delay equalization method and system

Abstract

The embodiment of the invention provides an SDN-based multi-link delay equalization method and system. The method comprises the following steps that: an SDN switch transmits private two-layer message calculation link delay to a neighbor switch; the SDN switch reports MAC (Media Access Control) address information, port information and the link delay to an SDN controller in order that the SDN controller calculates network topology; and the SDN switch reports a message of an unmatched flow table to the SDN controller, wherein the message of the unmatched flow table includes destination MAC, the network topology and the link delay in order that the SDN controller calculates a forwarding path with smallest link delay and issues a flow table of the forwarding path with the smallest link delay to the SDN switch. Through adoption of the SDN-based multi-link delay equalization method and system, the forwarding path with the smallest delay can be selected accurately through centralized computing of the controller.

Description

Technical field [0001] The embodiment of the present invention relates to the field of communication technology, and in particular to a method and system for multi-link delay equalization based on SDN (Software Defined Network, software defined network). Background technique [0002] With the rapid development of the Internet, its scale is rapidly expanding, new network services continue to appear, and the network topology is becoming increasingly complex. It is more difficult to effectively manage and control the Internet with the characteristics of openness, distribution, non-cooperation, and heterogeneity. With the popularity of the Internet, in order to avoid a single point of failure and performance bottleneck caused by an Internet link, multiple Internet service providers are usually selected. [0003] Network delay is one of the important network performance indicators. Delay usually refers to the time required for a message or packet to be transmitted from one end of the n...

AI Technical Summary

Problems solved by technology

The time delay from switch S0 to switch S1 is t0, the time delay from switch S1 to switch S2 is t1, the time delay from switch S1 to switch S3 is t2, and the time delay from switch S2 to switch S3 is t3, assuming t1t2, which leads to the total link of S0-S1-S2-S3-Telecom 2 The delay is greater than the total link delay of S0-S1-S3-Telecom 2

[0005] Because the traditional distributed delay calculation and delay strategy are difficult to perceive the delay of the entire forwarding path, it is often impossible to establish a minimum delay forwarding path

Images