Sidelink Sensor Message Transmission Using Sight Stopping Distance
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Solution Overview
Problem
Current 5G wireless communication technologies lack a mechanism for determining the appropriate distance for enforcing high-reliability transmission of sensor-related messages in sidelink communications, which is crucial for ensuring timely reception of safety-critical information by nearby vehicles.
Innovation Solution
A vehicle can determine the sight stopping distance (SSD) of nearby receiving vehicles based on information from basic safety messages (BSMs), and use this SSD to compute an appropriate range for enforcing high-reliability transmission of sensor-related messages, such as warnings of obstacles in the driving path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sensor-related messages are transmitted to all nearby vehicles, then more vehicles receive safety information, but transmission reliability cannot be ensured for vehicles at greater distances
Solution Approach 1:
The patent applies local quality by determining different transmission ranges for different receiving vehicles based on their individual sight stopping distances. Each vehicle receives messages with appropriate reliability guarantees according to its specific distance and reaction requirements, rather than applying a uniform transmission range to all vehicles.
Solution Approach 2:
The patent changes the transmission range parameter dynamically based on the calculated sight stopping distance of each receiving vehicle. The transmission range is adjusted as a function of the vehicle's speed, reaction time, and distance to the obstacle, ensuring that messages are transmitted only to vehicles within the computationally determined reliable range.
2Loss of time
If transmission range is increased to cover more vehicles, then more vehicles receive messages, but reaction time may be insufficient for vehicles at the edge of range
Solution Approach 1:
The patent performs preliminary calculation of the sight stopping distance before message transmission. By computing the required distance based on vehicle speed and reaction time in advance, the system ensures that only vehicles with sufficient reaction time are included in the transmission range, preventing time-critical messages from being sent to vehicles that cannot respond in time.
Solution Approach 2:
The patent uses feedback from basic safety messages (BSMs) received from other vehicles to determine their current speed and position. This feedback information is used to dynamically adjust the sight stopping distance calculation, ensuring that the transmission range is continuously optimized based on real-time vehicle conditions.
3Reliability
If sight stopping distance is calculated for each receiving vehicle, then transmission range is optimized, but computational complexity increases
Solution Approach 1:
The patent applies self-service by having each vehicle independently calculate its own sight stopping distance based on its own parameters (speed, reaction time) and the obstacle information. This distributes the computational burden across individual vehicles rather than requiring a centralized system to perform complex calculations for all vehicles, reducing overall system complexity.
Solution Approach 2:
The patent calculates sight stopping distance only for vehicles that are potential recipients of sensor-related messages, rather than performing exhaustive calculations for all possible vehicles in the network. This partial action approach focuses computational resources on relevant vehicles within the communication range, reducing unnecessary computational complexity.
Data Source
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AI summary
Some aspects described herein relate to detecting, for a first vehicle, presence of an obstacle in a driving path of a vehicle, determining, for a second vehicle, a sight stopping distance between the second vehicle and the obstacle, and transmitting, to the second vehicle and where the sight stopping distance is within a threshold, a message including a notification of the obstacle.