Optical Bus Network Head-End Management for Low-Latency Control
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Solution Overview
Problem
Existing fieldbus-based industrial control networks face issues such as high latency, low bandwidth, poor secondary station capability, and poor anti-interference, making them unsuitable for future industrial control network requirements, while optical communication technology has not been effectively integrated into these networks.
Innovation Solution
A management mechanism is introduced using a controller to allocate an identifier to an optical head end and determine a management protocol, enabling efficient management and communication of optical terminals through a frame structure with TLV structures and various fields to facilitate scalable and efficient information transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If active devices (transistors, diodes) are used in optical communication systems, then signal amplification and active control functions are achieved, but device complexity and failure points increase
Solution Approach 1:
The patent replaces active electronic devices (transistors, diodes) with passive optical components (optical circulators, couplers, isolators). This substitution eliminates the need for electronic amplification and control elements in the optical path, thereby reducing device complexity and failure points while maintaining signal transmission functionality through optical means alone.
Solution Approach 2:
The patent extracts and removes active devices from the optical communication system. By eliminating transistors, diodes, and other active components from the optical path, the system achieves a passive optical architecture that reduces complexity while maintaining essential signal transmission and isolation functions through purely optical components.
2Adaptability or versatility
If more devices are added to optical communication systems, then signal processing capabilities are enhanced, but the number of failure points and insertion losses increases
Solution Approach 1:
The patent replaces active signal processing devices with passive optical components that perform similar functions. Optical circulators, couplers, and isolators provide signal routing, combining, and isolation without the failure points associated with active devices, thereby enhancing reliability while maintaining signal processing capabilities.
Solution Approach 2:
The patent uses optical copying and routing through passive components like optical circulators and couplers to achieve signal processing functionality. These components create optical paths that replicate and distribute signals without requiring active electronic processing, reducing failure points while maintaining versatility.
3Speed
If conventional optical components are used, then optical signal transmission is achieved, but back-propagating light causes instability and performance degradation
Solution Approach 1:
The patent introduces optical isolators as intermediary components in the optical path. These isolators act as mediators that allow forward-propagating optical signals to pass while blocking back-propagating light. This prevents feedback into the laser source, eliminating instability and performance degradation caused by back-reflections while maintaining high-speed optical transmission.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enhances the scalability and management efficiency of optical bus networks, improving latency, bandwidth, and anti-interference capabilities, making them suitable for advanced industrial control applications.
Implementation Method 1
an optical circulator having a first input port to receive the optical signal, a first output port to output the optical signal, a second input port and a second output port
Implementation Method 2
an optical isolator having a third input port connected to the first output port of the optical circulator, a third output port connected to the laser unit, and configured to block propagation of light towards the third input port
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A communication method and apparatus, and an optical bus network are provided. This application relates to the field of industrial data communication technologies. In the method, a controller sends, when discovering a target optical head end, a target optical head end identifier to the target optical head end, where the target optical head end identifier is for identifying the target optical head end; the controller determines a target management protocol from management protocols supported by the target optical head end; and the controller communicates target information with the target optical head end based on the target optical head end identifier and the target management protocol, where the target information is used by the controller to manage the target optical head end and/or at least one optical terminal managed by the target optical head end. According to the method, a management mechanism by a controller for an optical head end and/or at least one optical terminal managed by the optical head end in an optical bus network is provided.