Cross-Intersection Navigation Using Occupancy-Based Vehicle Coordination
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Solution Overview
Problem
Unmanned vehicles face challenges in safely navigating cross intersections without traffic lights, as existing solutions require modifications to traffic lights, are vulnerable to environmental factors, or have low prediction success rates, especially for large vehicles.
Innovation Solution
A navigation method and system that allows vehicles to request passage through an intersection controller, which determines occupancy and movement conflicts, and transmits instructions to the vehicle controller to safely pass or wait, using wireless communication and occupancy lists to manage vehicle passage without the need for traffic lights.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If unmanned vehicles use existing navigation methods at cross intersections, then they can pass through intersections, but safety is compromised due to conflicts with other vehicles and low prediction success rates
Solution Approach 1:
The patent introduces an intersection controller as an intermediary system that coordinates vehicle passage through cross intersections. The controller receives occupancy information from multiple vehicles, determines safe passage timing, and transmits control instructions to each vehicle. This mediator resolves conflicts between vehicles by centralizing decision-making, thereby improving both safety and prediction accuracy without requiring vehicles to independently predict complex multi-vehicle interactions
Solution Approach 2:
The system implements continuous feedback loops where vehicles transmit their occupancy status and movement intentions to the intersection controller, which then provides real-time control instructions back to the vehicles. This feedback mechanism enables dynamic adjustment of passage timing based on actual intersection conditions, enhancing both safety through conflict detection and prediction success rate through iterative optimization
2Reliability
If traffic lights are installed at cross intersections to manage vehicle passage, then safety improves, but infrastructure cost and system complexity increase
Solution Approach 1:
The patent replaces the mechanical traffic light system with an electronic communication-based coordination system. Instead of using physical signals that require infrastructure installation, the system uses wireless communication between vehicles and the intersection controller to exchange occupancy and control information. This substitution eliminates the need for traffic lights while maintaining safety through digital coordination, thereby reducing infrastructure complexity and cost
Solution Approach 2:
Vehicles in the system autonomously transmit their occupancy status and receive control instructions without requiring external traffic management infrastructure. Each vehicle actively participates in the coordination process by providing its own state information and executing controller decisions, enabling the system to self-manage intersection passage without traditional traffic control devices
Data Source
AI summary
Embodiments of the present disclosure provide a navigation method, device and system for a cross intersection. The method includes: receiving a message transmitted from a vehicle controller, where the message indicates a request of a vehicle for passing an intersection; and determining whether to allow the vehicle to pass the intersection based on an occupancy condition of the intersection and transmitting an action instruction to the vehicle controller to cause the vehicle controller to control movement of the vehicle.