Line Driver Dual-Path Switching for Fault-Tolerant Data Flow
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Solution Overview
Problem
Existing communication systems in automobiles, such as CAN and LIN, are complex, costly, and prone to failures that disrupt the entire system due to their serial bus architecture, lacking a natural addressing method and increasing susceptibility to errors, necessitating a balance between fault-tolerance and cost-efficiency.
Innovation Solution
A line driver device with a first and second communication path, utilizing a transistor to redirect data flow, ensuring fault-tolerance by allowing passive signal transmission when inactive, thus maintaining data flow even if a component fails.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a serial bus architecture (CAN/LIN) is used for communication between control units, then the system can be implemented with existing standardized protocols, but the system becomes susceptible to errors where a single failure can disrupt the entire system and the complexity increases
Solution Approach 1:
The system segments the serial communication path into multiple parallel paths by introducing alternative routing options. When a failure occurs in one path, the system can segment the failure isolation and continue communication through alternative segments, preventing single-point failures from disrupting the entire system.
Solution Approach 2:
The system dynamically switches between different communication paths based on operational status. The controller can dynamically select alternative routes when failures are detected, making the system adaptable and resilient to component failures without requiring complete system redesign.
2Reliability
If specialized communication protocols like CAN are used, then fault-tolerance can be improved, but the manufacturing cost and technical effort increase significantly
Solution Approach 1:
The communication device performs multiple functions: it can operate in standard serial mode for normal communication and switch to alternative path mode for fault tolerance. This multi-functionality allows the system to achieve enhanced reliability without requiring completely separate specialized hardware, thereby controlling manufacturing costs.
Solution Approach 2:
The patent introduces an intermediary alternative communication path that mediates between the primary communication route and the controller. This intermediary path provides fault-tolerance capabilities without requiring complete redesign of the existing communication infrastructure, balancing reliability improvement with manufacturing feasibility.
3Device complexity
If multiple command units are connected in series, then the system can be compact and cost-effective, but the susceptibility to errors increases and the data flow can be cut off by a single failure
Solution Approach 1:
The patent adds an additional dimension to the communication architecture by introducing alternative paths alongside the primary serial connection. This dimensional expansion transforms the system from a single-line serial connection to a multi-path configuration, maintaining compactness while providing redundancy against failures.
Data Source
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AI summary
The present invention relates to a line driver device which allows, for example in a system arrangement for controlling execution units, a first or second communication path to be selected for further data flow with little technical complexity. In addition, the proposed line driver device is particularly fault-tolerant and suitable, inter alia, for use in an automobile. The present invention further relates to a corresponding system arrangement and to a method for operating or producing the line driver device. Furthermore, a computer program product is disclosed, comprising control commands which execute the proposed method and/or produce or operate the line driver device.