Network switching method and device based on dual-redundancy control network

By adopting a network switching method based on a dual-redundant control network and utilizing clock synchronization and dynamic QoS scoring mechanisms, seamless switching of the industrial control system in the event of equipment failure is achieved, ensuring that the system can be maintained and upgraded without interruption of operation or production, thereby improving the system's reliability and real-time performance.

CN120979912AInactive Publication Date: 2025-11-18ZHEJIANG SUPCON RES +1
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Patent Information

Application Number
CN202511510121.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-10-22
Publication Date
2025-11-18
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

In industrial control systems, when faced with scenarios such as equipment failure and sudden power outages, existing technologies struggle to achieve fully automated, uninterrupted, and unstoppable system maintenance and upgrades with zero interference and zero downtime. Furthermore, the reliability and real-time performance of the system cannot be guaranteed during vulnerability patching.

Method used

A network switching method based on a dual-redundant control network is adopted. Through dual-redundant architecture, clock synchronization mechanism, dynamic primary/backup switching and intelligent status monitoring, the high reliability, real-time performance and adaptive capability of the control network are achieved. The network quality assessment and dynamic switching are carried out by using a clock compensation model and dynamic QoS comprehensive scoring mechanism to ensure that the backup module can quickly and seamlessly take over when the primary module fails.

Benefits of technology

It enables seamless switching to backup networks in industrial control systems, avoiding system paralysis due to single point of failure, ensuring the timeliness of control commands and the timeliness of status feedback, improving bandwidth utilization, and meeting the stringent timing requirements of industrial control scenarios.

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Abstract

The invention discloses a network switching method based on a dual-redundancy control network, which comprises the following steps of: determining one of a first communication management module of a first network and a second communication management module of a second network as a master communication management module based on master-slave configuration data through overlapping moment detection, dynamic arbitration or static arbitration and master heartbeat detection; the other communication management module is a standby communication management module; the method comprises the following steps: respectively realizing clock synchronization of a first network and a second network by constructing a clock compensation model based on a clock synchronization protocol, wherein the clock compensation model calculates and obtains a first compensation parameter and a second compensation parameter corresponding to the first network and the second network through a sliding window; obtaining a periodic signal through the first communication management module or the second communication management module; starting a signal transmission period and a non-signal transmission period to transmit control data or state data; and updating the main communication management module and the standby communication management module based on the state data.
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