Vulnerable Road User Detection Using Sensor-Triggered Safety Alerts
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Solution Overview
Problem
Existing wireless communication systems struggle to accurately predict and prevent collisions between vehicles and pedestrians, particularly when either the driver or pedestrian is in a vulnerable state such as inebriated, distracted, or impaired, due to the inability to determine their state effectively.
Innovation Solution
A UE equipped with sensors monitors user states and transmits a public safety message (PSM) to a network entity, which identifies nearby UEs and sends alert messages with priority levels based on collision probability and environmental factors, adjusting network settings to mitigate risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sensor monitoring and PSM transmission are implemented to detect vulnerable road users, then collision prevention capability is improved, but system complexity and energy consumption increase
Solution Approach 1:
The system divides the collision prevention function into separate modules: sensor monitoring for detecting vulnerable road users, PSM transmission for communicating vulnerability status, and alert message transmission for warning other devices. Each module operates independently but coordinates through standardized messages, reducing overall system complexity while maintaining high reliability
Solution Approach 2:
The system performs preliminary detection of vulnerable road users through sensor monitoring before collisions occur. By identifying vulnerable users in advance and transmitting PSMs to alert nearby devices, the system prevents collisions proactively rather than reacting after incidents occur, thereby improving reliability
2Measurement precision
If continuous sensor monitoring is performed to identify vulnerable states, then detection accuracy is improved, but energy consumption increases
Solution Approach 1:
Instead of continuous monitoring, the system performs sensor monitoring periodically or event-triggered. The UE monitors sensors at intervals or when specific conditions change, transmitting PSMs only when vulnerable states are detected. This periodic approach maintains detection accuracy while significantly reducing energy consumption compared to continuous monitoring
3Reliability
If alert messages are transmitted to all nearby UEs, then safety coverage is improved, but network traffic and interference increase
Solution Approach 1:
The system transmits alert messages with localized scope, targeting only UEs within a specific threshold distance of the vulnerable road user. By using positioning information to determine proximity and sending alerts only to relevant nearby devices rather than all UEs, the system maintains comprehensive safety coverage for at-risk areas while minimizing unnecessary network traffic and interference
Data Source
AI summary
Methods, systems, and devices for wireless communication are described. A first user equipment (UE) may monitor various sensors to obtain data associated with a user of the first UE, and may determine that the user is in a vulnerable state based on monitoring these sensors. The vulnerable state of the user may include an inebriated state, a distracted state, an impaired state, or a disabled state, among other examples. After detecting the vulnerable state of the user, the first UE may transmit a public safety message (PSM) to other devices in the area. Upon receiving the PSM from the UE, a network entity may use positioning information to identify other UEs within a threshold distance of the first UE, and may transmit an alert message to these UEs. The techniques described herein may reduce the probability of nearby pedestrians or vehicles colliding with the user.