Two-Wire Broadband Bus Architecture for Deterministic Ethernet
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Solution Overview
Problem
Current industry control systems face issues with low performance, poor real-time data transmission reliability, and complexity in network management due to heavy loading and collision errors in Ethernet and CAN bus systems, which affect deterministic and secure data transmission.
Innovation Solution
The implementation of a Time-Triggered Ethernet (TTE) or TDMA-based industry internet field broadband bus architecture with a synchronized bus controller and terminals, using a two-wire data transmission network, allows for precise clock synchronization and separate time slices for real-time and non-real-time data, ensuring high-performance, reliable, and secure data transmission without modifying existing wiring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If Ethernet operates with CSMA/CD protocol, then network connectivity is achieved, but deterministic real-time transmission reliability deteriorates when network loading exceeds 40%
Solution Approach 1:
The patent segments the transmission medium into dedicated time slots for different data types. Real-time data are transmitted in dedicated time slots reserved in advance, while non-real-time data use remaining slots. This segmentation eliminates collisions for real-time data and ensures deterministic transmission reliability even under heavy network loading conditions.
Solution Approach 2:
The patent implements periodic time-division multiplexing where transmission rights are allocated in periodic cycles. Each station is assigned specific time slots within each period, creating a structured, collision-free transmission schedule that guarantees real-time performance while maintaining high network utilization.
2Reliability
If CAN bus uses event trigger mechanism, then flexible data transmission is achieved, but transmission reliability deteriorates due to collision errors and jams
Solution Approach 1:
The patent performs preliminary allocation of time slots before actual data transmission. Transmission rights are reserved in advance for each station and data type, eliminating the need for runtime collision detection and arbitration. This preliminary scheduling ensures reliable transmission while maintaining operational flexibility through configurable slot assignments.
3Productivity
If master-slave stations operate freely on CAN bus, then communication connectivity is achieved, but channel transmission rate deteriorates due to nodes occupying significant channel components
Solution Approach 1:
The patent implements dynamic time slot allocation that adapts to different communication needs. While transmission rights are structured in time slots, the allocation can be dynamically configured based on traffic patterns and priority requirements. This dynamic scheduling maximizes channel utilization and transmission rate while maintaining the flexibility needed for various communication scenarios.
Data Source
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AI summary
The invention relates to an industry internet field broadband bus architecture system based on the two-wire data transmission network widely used in the traditional industry control system, so that the system can provide high-performance Ethernet communication without modifying original wiring and topologies, thus providing a high-performance, highly reliable, highly real-time, and highly secured solution to switching an industry control system field layer network from a traditional field bus to an industry Ethernet bus.