Optical Head-End Slave Station Mapping for Low-Latency Field Bus Links
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Solution Overview
Problem
Current field bus networks using twisted pair connections fail to meet the higher-level low-latency requirements of industrial manufacturing due to millisecond-level operation periodicity, necessitating a solution for lower-delay communication.
Innovation Solution
Implementing optical fiber communication for managing slave stations by determining a correspondence between slave station device and node identifiers, using an optical head end to configure and manage slave stations, and integrating programmable logic controllers (PLCs) for enhanced management operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If twisted pair connection is used in field bus network, then hardware simplicity and cost-effectiveness are maintained, but transmission delay is high (millisecond level) and communication efficiency is low
Solution Approach 1:
The patent replaces the traditional electrical signal transmission mechanism (twisted pair connection) with an optical signal transmission mechanism (optical fiber connection). This substitution fundamentally changes the transmission medium from electrical to optical domain, achieving millisecond-level reduction in transmission delay while maintaining system manageability through optical communication protocols
Solution Approach 2:
The patent changes the transmission parameter from electrical signals to optical signals, utilizing the higher speed of light compared to electrical signals in twisted pairs. This parameter change enables the transmission delay to be reduced from millisecond level to microsecond level, significantly improving communication efficiency in industrial manufacturing scenarios
2Productivity
If optical fiber communication is implemented, then transmission delay is reduced and communication efficiency is improved, but hardware complexity and initial cost increase
Solution Approach 1:
The patent implements a universal optical communication system that can serve multiple functions: slave station management, real-time data transmission, and high-speed communication. By using optical fiber as the underlying medium, the system achieves multi-functional capabilities that were not possible with traditional twisted pair connections, including both management and high-speed data communication through a single infrastructure
Solution Approach 2:
The patent introduces an optical communication intermediary layer between the master station and slave station, using optical fibers as the transmission medium. This intermediary enables efficient data exchange by leveraging the high bandwidth and low latency characteristics of optical communication, while the system manages complexity through standardized optical communication protocols and interfaces
3Loss of time
If optical fiber communication is used, then transmission delay is reduced to microsecond level, but system configuration and management complexity increases
Solution Approach 1:
The patent implements feedback mechanisms in the optical communication system for status monitoring, error detection, and performance management. The system continuously monitors optical signal quality, transmission status, and communication performance, providing feedback information that enables automatic adjustment and simplifies operational management. This feedback loop allows the system to self-optimize and reduce manual configuration requirements
Solution Approach 2:
The patent performs preliminary configuration and parameter setup during system initialization and deployment phases. Node identifiers, communication parameters, and routing information are pre-configured before operation begins, reducing the need for complex real-time configuration during normal operation. This preliminary action simplifies ongoing system management while maintaining low transmission delay characteristics
Data Source
AI summary
In a method, an optical head end first determines a first correspondence, where the first correspondence indicates a correspondence between a slave station device identifier and a slave station node identifier. Then the optical head end receives a first message from an optical terminal, where the first message includes device information, the device information includes a first device identifier, and the first device identifier indicates a first slave station connected to the optical terminal. Then, the optical head end determines, from the first correspondence, a first node identifier corresponding to the first device identifier. Further, the optical head end sends the first node identifier to the optical terminal.