Research on Multi-priority Real-time Data Transmission Scheduling Method for Intelligent Production Line

In the communication process of network equipment on the intelligent production line, there are different kinds of fault operation and maintenance data, which have different requirements on transmission volume and real-time performance. Under the condition of diversified sensor information and large amount of data need to be transmitted, traditional communication methods cannot realize real-time and reliable transmission of time-sensitive data. In view of the low real-time transmission of time-sensitive data in the current intelligent production line transmission network and the inability to adopt a reasonable scheduling method for data with different delay tolerances, this paper proposes a multi-priority real-time data transmission scheduling method (MPRTDT). This method is based on the OPC unified architecture (OPC UA) heterogeneous network equipment interconnection model, and divides the alarm data, status data, image data and video data in this model queue into 4 different priorities, and uses a mixed time slot data transmission mechanism to combine multiple time slots into a perceptual time slot (PTS). According to the different priorities of industrial data, this algorithm achieves a reasonable allocation of perceptual time slots. This model combines the queue dynamic transmission scheduling mechanism to ensure the priority transmission of high-priority real-time data such as alarm information. Simulation experiment results show that this method can provide differentiated services for different types of data, and ensures the real-time nature of time-sensitive data transmission and effectively improves the service quality level of the entire intelligent production line communication network.