Subscriber Station Serial Bus Connection Quality Detection
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Solution Overview
Problem
Current serial bus systems, such as CAN FD, struggle to detect imminent communication connection failures in real-time, leading to potential communication breakdowns, especially in critical applications like autonomous vehicles, where timely intervention is necessary to ensure functional safety.
Innovation Solution
A subscriber station for serial bus systems equipped with a communication control device, a transmitting/receiving device, and a connection quality block that evaluates connection quality by subdividing bit time into time quanta, allowing for early detection of deteriorating connections and initiation of corrective measures, thereby ensuring functional safety without requiring costly analog evaluations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If connection quality is evaluated by counting erroneous frames, then the evaluation method is simple, but the detection is too late to prevent communication failures
Solution Approach 1:
The patent applies preliminary action by evaluating connection quality parameters (signal voltage levels, bit error rates, signal-to-noise ratio) before erroneous frames are generated. The connection quality block continuously monitors these parameters and triggers warning signals when thresholds are approached, enabling preventive measures before actual communication failures occur.
2Ease of manufacture
If digital evaluation of connection quality is implemented, then cost is reduced, but measurement precision must be maintained
Solution Approach 1:
The patent replaces costly analog signal analysis with digital evaluation methods. The transmitting/receiving device converts analog bus signals to digital form, and the connection quality block uses digital processing to evaluate connection parameters such as voltage levels, bit patterns, and error rates, achieving both cost reduction and sufficient measurement precision.
3Measurement precision
If multiple time quanta are used for evaluation, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the bit time into multiple time quanta for sampling and evaluating the connection signal. This temporal segmentation allows the system to assess signal stability and detect degradation patterns across different time intervals, improving measurement precision without requiring complex spatial structures.
Data Source
AI summary
A subscriber station for a serial bus system and a method for communicating in a serial bus system. The subscriber station includes a communication control device for controlling a communication of the subscriber station with at least one other subscriber station of the bus system, a transmitting/receiving device for receiving a transmission signal generated by a communication control device of a subscriber station of the bus system in a frame from a bus of the bus system and for generating a reception signal from the received frame, and a connection quality block for detecting and evaluating a quality of a communication connection to a subscriber station of the bus system from the reception signal generated by the transmitting/receiving device by using at least two time quanta, into which the bit time of a bit of the generated reception signal is subdivided.