Edge computing node selection method and system in time delay sensitive network

Abstract

The invention provides an edge computing node selection method and system in a time delay sensitive network, and the method comprises the steps: firstly, setting service priorities of time delay sensitive businesses based on a control quality requirement; secondly, in an initial edge calculation node selection stage, according to the priority sequence, enabling a software-defined network controller to select edge computing nodes according to a time delay priority principle on the basis of guaranteeing each service QoC based on the acquired control type service quality requirements, network topology and idle resource conditions of the edge computing nodes; finally, during the process of unloading calculation tasks, a calculation task enabling a software-defined network controller to pre-estimate current control-type business QoC based on the current network topology information sensed in real time and idle resource state of the edge nodes. When AoC of certain business is lower than expected threshold, new edge calculation nodes are selected instantly. The business are guided to new edge computing nodes through routing reconfiguration, thereby practically guaranteeing the QoC ofthe control-type business.

Description

technical field [0001] The invention relates to an edge computing node selection method in the industrial Internet, in particular to a method and system for selecting an edge computing node with control quality assurance in a delay-sensitive network. Background technique [0002] Time sensitive network (TSN, time sensitive network) technology has become a key network transmission technology in the industrial Internet because of its extremely high transmission delay guarantee. In addition, edge computing technology can greatly reduce the end-to-end closed-loop control delay by processing data close to the industrial site. Therefore, the delay-sensitive network integrated with edge computing has become a research hotspot in the field of industrial Internet in recent years. [0003] Edge computing nodes deployed in delay-sensitive networks mainly include nodes such as programmable logic controllers (PLCs), delay-sensitive gateways (TSN bridges) and specially deployed edge comp...

AI Technical Summary

Problems solved by technology

However, when terminal nodes gather to an edge computing node at a certain time and new services with higher service priority appear, the delay-first node selection scheme is likely to overload the task of an edge computing node, which will bring a very serious problem. The high failure rate of computing offloading leads to the failure of QoC guarantee; the node selection scheme that gives priority to idle computing resources does not take into account the stringent requirements of control services on delay, which may cause the delay to exceed the QoC requirement

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