Vehicle Communication Signal Detection With Adaptive Reference Timing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing systems struggle to accurately detect and differentiate between legitimate and illegitimate signals in a vehicle's communication network, particularly in the presence of disturbances and timing shifts, which can lead to erroneous determinations.
Innovation Solution
A signal detection apparatus and method that utilizes a signal detection unit and determination unit within an ECU to set reference signals based on timing shifts within predetermined thresholds, allowing for accurate identification of illegal signals by comparing detection timings to reference timings and utilizing internal signal information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing signal detection systems are used to detect illegal signals in vehicle communication networks, then signal detection capability is provided, but false positives occur due to inability to differentiate between legitimate and illegitimate signals under disturbances and timing shifts
Solution Approach 1:
The system performs preliminary actions by setting reference signals and reference timings before actual signal detection. The reference signal is established based on expected signal characteristics, and reference timing is predetermined based on communication cycles. This preliminary setup enables accurate comparison during detection, allowing the system to distinguish legitimate signals from illegal ones even under disturbances and timing shifts.
Solution Approach 2:
The system dynamically adjusts detection thresholds and reference timings based on accumulated timing shift information. When timing shifts are detected within acceptable ranges, the reference timing is updated adaptively. This dynamic adjustment allows the system to maintain high detection accuracy while accommodating normal timing variations in vehicle communication networks.
2Measurement precision
If strict signal timing verification is performed to identify illegal signals, then detection precision is improved, but false positives increase due to normal timing variations and disturbances
Solution Approach 1:
The system changes detection parameters dynamically by adjusting timing thresholds and reference timings based on accumulated timing shift data. Instead of using fixed strict thresholds, the system adapts parameters to account for normal timing variations in the communication network. This parameter adjustment maintains high detection precision while reducing false positives caused by legitimate timing fluctuations.
Solution Approach 2:
The system implements feedback mechanisms where detection results and timing shift information are fed back to update reference timings and detection thresholds. The determination unit accumulates timing shift information and uses this feedback to adjust future detection parameters. This continuous feedback loop enables the system to learn from normal variations and distinguish them from actual illegal signals, reducing false positives while maintaining precision.
3Adaptability or versatility
If reference signals are updated frequently to adapt to timing shifts, then detection adaptability is improved, but system stability deteriorates due to excessive updates under disturbances
Solution Approach 1:
The system applies partial action by updating reference signals selectively rather than frequently. The determination unit evaluates timing shift information and only updates reference signals when shifts exceed predetermined thresholds, indicating genuine timing changes rather than normal variations or disturbances. This selective updating maintains detection adaptability while preventing excessive updates that would destabilize the reference signals.
Solution Approach 2:
The system provides beforehand cushioning by establishing predetermined thresholds and validation criteria before reference signal updates occur. These pre-set criteria act as a buffer against premature or erroneous updates caused by temporary disturbances. By requiring timing shifts to exceed these predetermined thresholds before triggering updates, the system protects reference signal stability while still adapting to genuine timing changes.
Data Source
AI summary
A signal detection apparatus includes a signal detection unit which detects signals expected to be input to a communication network in a predetermined cycle, and a determination unit which determines whether detection timing of a second signal detected by the signal detection unit after a first signal which is set as a reference signal for determining an illegal signal is in a predetermined range within which reference timing falls among the signals detected by the signal detection unit, and whether a shift between the detection timing of the second signal and the reference timing is a first threshold or less, in which the determination unit sets the second signal as the reference signal when the shift is the first threshold or less, and sets the first signal as the reference signal without setting the second signal as the reference signal when the shift exceeds the first threshold.