Unreliable V2X Communication in Cooperative Driving: Safety Times for Emergency Braking

Cooperative driving is a promising paradigm to improve traffic efficiency and safety. In congested traffic scenarios, such cooperation allows for safe maneuvering and driving with small inter-vehicle spatial gaps. The vehicles involved coordinate their movements in real-time and continuously update...

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Bibliographic Details
Published in:IEEE access 2021, Vol.9, p.148024-148036
Main Authors: Thunberg, Johan, Bischoff, Daniel, Schiegg, Florian A., Meuser, Tobias, Vinel, Alexey
Format: Article
Language:English
Subjects:
Age of information
Algorithms
Braking
Collaborative maneuvering
Collision avoidance
Communication
Cooperative driving
Driving
IEEE 802.11p
IEEE 80211p
Information age
Intelligent intersection
Monitoring
Quality assessment
Roads
Safety
Time functions
Traffic
Traffic congestion
Traffic planning
Trajectory
V2X communications
Vehicle-to-everything
Vehicles
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Summary:Cooperative driving is a promising paradigm to improve traffic efficiency and safety. In congested traffic scenarios, such cooperation allows for safe maneuvering and driving with small inter-vehicle spatial gaps. The vehicles involved coordinate their movements in real-time and continuously update each other about their maneuver execution status by means of Vehicle-to-Everything (V2X) communication. However, unreliable V2X communication increases the Age of Information (AoI) of vehicles' status updates, posing a challenge in situations where emergency braking is required during cooperative maneuvering. To address the interplay between unreliable V2X communication and the resulting impact on traffic safety, we introduce a so-called safety time function , specifically designed for cooperative driving use-cases. The safety time function provides the time available for a vehicle to react to an unexpected event of another vehicle - such as emergency braking to avoid a collision. We provide a computationally efficient algorithm for the computation of safety time functions, which allows for efficient and safe cooperative maneuver planning - even in dense traffic scenarios with many vehicles involved. We show the applicability of our proposed safety time function based on the assessed communication quality for IEEE 802.11p-based V2X communication to meet safety constraints in dense vehicular traffic.
ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2021.3124450