Vehicle Alert Acknowledgment Control by Distance and Alert Type
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Solution Overview
Problem
Existing vehicle-to-vehicle communication systems face issues with long communication times due to the multi-path phenomenon and high collision probability of radio-frequency signals, leading to potential hazards from undetected alerts and increased collisions from unnecessary acknowledgment signals.
Innovation Solution
An electronic control unit in vehicles uses a lookup table to determine the need for response messages based on distance and alert type, dispatching them only for vehicles near the traffic event, reducing unnecessary message collisions and ensuring nearby vehicles receive alerts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If every connected vehicle sends an acknowledgment signal upon receiving an alert signal, then the system can verify receipt of alerts, but the collision probability between signals increases significantly
Solution Approach 1:
The patent applies local quality by making the acknowledgment behavior location-dependent. Vehicles within a specific distance threshold of the alerting vehicle send acknowledgments, while distant vehicles do not. This selective approach based on spatial location reduces overall signal collisions while maintaining verification for relevant vehicles.
Solution Approach 2:
Instead of requiring all receiving vehicles to send acknowledgments (excessive action), the patent implements partial action where only vehicles within the distance threshold send acknowledgments. This partial acknowledgment scheme is sufficient to verify receipt for vehicles that need the alert information while reducing collision probability.
2Reliability
If radio-frequency alert signals are transmitted to nearby vehicles, then drivers can be warned of hazards, but communication time increases due to multi-path phenomenon
Solution Approach 1:
The patent changes the parameter of acknowledgment transmission by introducing a distance threshold parameter. This parameter modification allows the system to adapt acknowledgment behavior based on spatial relationship, effectively managing communication time while maintaining hazard warning reliability for nearby vehicles.
3Reliability
If the number of simultaneously emitted alert signals increases, then more vehicles can be notified of hazards, but the probability of signal collision increases
Solution Approach 1:
The patent applies local quality by creating different acknowledgment behaviors for vehicles in different spatial zones. Vehicles within the distance threshold of the alerting vehicle send acknowledgments, while distant vehicles do not. This spatial differentiation reduces overall signal collision probability while maintaining notification coverage.
Data Source
AI summary
An electronic control unit for a vehicle. The electronic control unit including a memory region in which is stored a lookup table indicating, depending on a type of alert and on the distance between the vehicle and a traffic event relating to the alert, the need to send a response message to the alert signal. The electronic control unit being configured to: receive an alert signal relating to a traffic event containing the type of alert and the position of the traffic event, receive the predetermined position of the vehicle, determine the distance between the vehicle and the traffic event, determine, based on the lookup table and on the determined distance, whether or not there is a need to send a response message to the alert signal, and dispatch a command signal commanding a response message to be sent.