Cross-Network Time Synchronization for Industrial Wireless and TSN Fusion
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Solution Overview
Problem
Current technologies face challenges in achieving accurate cross-network time synchronization, particularly in industrial heterogeneous networks that combine wireless and wired communication protocols, due to high requirements for timeliness and low delay.
Innovation Solution
A cross-network time synchronization method that utilizes statistical algorithms and synchronization modes like IEEE 802.1AS, beacon frame synchronization, and timestamp-free synchronization to enhance accuracy between synchronization nodes in heterogeneous networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing time synchronization methods are used in industrial heterogeneous networks, then basic synchronization can be achieved, but synchronization accuracy is insufficient due to high requirements for timeliness and low delay
Solution Approach 1:
The patent segments the time synchronization process into distinct phases: time modeling between synchronization nodes, time error compensation modeling, and statistical algorithm application. This segmentation allows each phase to be optimized independently, improving overall synchronization accuracy while managing time delays effectively
Solution Approach 2:
The patent performs preliminary time modeling and error compensation before final synchronization is established. By pre-characterizing time errors and establishing compensation models in advance, the system reduces the actual time delay during operation while maintaining high synchronization accuracy
2Adaptability or versatility
If cross-network time synchronization is implemented in heterogeneous networks combining wireless and wired protocols, then network compatibility is improved, but synchronization accuracy deteriorates due to protocol differences
Solution Approach 1:
The patent introduces time modeling and error compensation models as intermediary layers between different network protocols. These intermediaries translate and reconcile time differences between wireless and wired protocols, enabling accurate cross-network synchronization despite protocol heterogeneity
Solution Approach 2:
The patent dynamically adjusts synchronization parameters based on the specific network protocol being used. By changing parameters such as synchronization intervals, error compensation factors, and statistical thresholds according to protocol characteristics, the system maintains high accuracy across diverse network types
3Measurement precision
If traditional synchronization methods are used without time error compensation, then system complexity is reduced, but synchronization accuracy is insufficient for industrial control requirements
Solution Approach 1:
The patent implements feedback mechanisms where time error compensation models continuously monitor and adjust synchronization based on measured deviations. This feedback loop automatically corrects errors without requiring complex manual intervention, achieving high accuracy with manageable system complexity
Solution Approach 2:
The synchronization system performs self-calibration through automatic time error compensation. The system independently models and corrects its own timing errors using statistical algorithms, eliminating the need for external calibration equipment or complex manual configuration
Data Source
AI summary
The present invention relates to a cross-network time synchronization method for industrial wireless network and TSN fusion, which belongs to the field of Industrial Internet, comprising the following steps: S1: conducting clock synchronization by a TSN module of a border gateway with a TSN switch of a TSN 2 in a slave clock state; S2: inside the border gateway, using the TSN module as a master clock of an industrial wireless module, and conducting clock synchronization by the industrial wireless module with the TSN module through a serial port; S3: conducting clock synchronization by a routing device in the industrial wireless network with the industrial wireless module of the border gateway through a beacon frame synchronization mode in the slave clock state, and conducting clock synchronization by the routing device as the master clock of a node device for the node device; S4: conducting clock synchronization by a terminal side conversion node in the slave clock state with the node device in the industrial wireless network through a timestamp-free synchronization mode, and finally, synchronizing a TSN switch of a TSN 1 with the terminal side conversion node in the slave clock state.