V2V Safety Message Transmission Rate Control
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Solution Overview
Problem
Existing vehicle-to-vehicle (V2V) communication systems face challenges in optimally adjusting transmission rates of safety messages to balance collision avoidance and radio channel load, as fixed rates or protocols based solely on channel load are not effective in achieving optimal results.
Innovation Solution
A system that dynamically adjusts V2V safety message transmission rates based on vehicle and inter-vehicle conditions, using a processor to determine a desired transmission rate that is high enough for collision avoidance but low enough to minimize channel load, with additional techniques to detect significant changes in distance and speed to avoid frequent rate changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the transmission rate of V2V safety messages is increased to improve collision avoidance responsiveness, then the collision detection capability is improved, but the radio channel load and congestion increase
Solution Approach 1:
The system dynamically adjusts the transmission rate of V2V safety messages based on real-time vehicle conditions, relative positions, and environmental factors. Instead of using a fixed transmission rate, the system continuously monitors parameters such as relative velocity, distance to other vehicles, and road conditions to adaptively optimize the message transmission frequency, thereby improving collision avoidance while managing radio channel load
Solution Approach 2:
The system changes the transmission rate parameter based on detected vehicle conditions and environmental factors. When vehicles are moving at high relative speeds or are in close proximity, the transmission rate is increased to ensure timely collision avoidance. When conditions are stable and vehicles are farther apart, the transmission rate is reduced to minimize radio channel congestion
2Object-generated harmful factors
If the transmission rate is decreased to minimize radio channel congestion, then the channel load is reduced, but the responsiveness for collision avoidance deteriorates
Solution Approach 1:
The system dynamically adjusts the transmission rate parameter based on detected vehicle conditions and environmental factors. When vehicles are moving at high relative speeds or are in close proximity, the transmission rate is increased to ensure timely collision avoidance. When conditions are stable and vehicles are farther apart, the transmission rate is reduced to minimize radio channel congestion
3Device complexity
If fixed transmission rates are used to simplify system complexity, then the device complexity is reduced, but the effectiveness in balancing collision avoidance and channel load performance deteriorates
Solution Approach 1:
The system dynamically adjusts the transmission rate of V2V safety messages based on real-time vehicle conditions, relative positions, and environmental factors. Instead of using a fixed transmission rate, the system continuously monitors parameters such as relative velocity, distance to other vehicles, and road conditions to adaptively optimize the message transmission frequency, thereby improving collision avoidance while managing radio channel load
Data Source
AI summary
Apparatus, methods and logic for vehicles to determine vehicle to vehicle (V2V) safety message transmission rates for transmitting V2V safety messages based on how frequently the vehicles actually need to exchange safety messages, including factors such as vehicle velocities, distances among vehicles, and on how quickly the inter-vehicle distances are closing up. The determined V2V safety message transmission rates are selectively dynamically adjusted in accordance with detected significant changes in one or more of the inter-vehicle distances or inter-vehicle speeds. To avoid needless frequent changes to the transmission rate, statistical modeling techniques including hypothesis testing and sequential change detection are selectively used to more accurately detect significant changes in inter-vehicle distances or inter-vehicle speeds that warrant a change to the message transmission rate.