A method and system for selecting edge computing nodes in a delay-sensitive network

Abstract

The present invention provides a method and system for selecting an edge computing node in a delay-sensitive network, wherein the method steps are: firstly, sort the service priorities of delay-sensitive services based on control quality requirements; secondly, at the initial edge In the computing node selection stage, according to the order of priority, the software-defined network controller is based on the collected quality of service requirements for control services, network topology, and idle resources of edge computing nodes. On the basis of guaranteeing the QoC of each service, the delay is prioritized. According to the principle of edge computing node selection; finally, in the process of computing task offloading, the software-defined network controller estimates the current control service QoC based on the real-time perception of the current network topology information and the idle resource status of the edge nodes. Once the QoC of some services is found to be lower than the expected threshold, a new edge computing node is selected immediately, and the service is guided to the new edge computing node through route reconfiguration, so as to effectively guarantee the QoC of the control service.

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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