Intersection Occupancy Control for Unmanned Crossing Navigation
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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 conditions, or have low prediction success rates, especially for large vehicles.
Innovation Solution
A navigation method and system where vehicles communicate with an intersection controller to determine if they can pass based on occupancy conditions, receiving action instructions to control their movement safely without the need for traffic lights, allowing for prioritization and conflict-free passage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If unmanned vehicles navigate cross intersections using existing solutions with traffic lights, then navigation control is provided, but the system requires modifications to traffic lights and has low reliability in environmental conditions
Solution Approach 1:
The patent introduces an intersection controller as an intermediary device that manages vehicle passage without requiring modifications to existing traffic lights. This controller receives occupancy information from vehicles and coordinates their movement through the intersection, serving as a mediator that resolves the contradiction by providing reliable navigation control while avoiding the complexity of modifying traffic light infrastructure
Solution Approach 2:
The patent replaces the mechanical/physical traffic light system with an electronic communication-based control system. Vehicles transmit occupancy messages electronically to the intersection controller, which then sends action instructions back to vehicles. This substitution eliminates the need for physical traffic light modifications while improving reliability through electronic coordination
2Reliability
If unmanned vehicles use prediction-based navigation methods, then movement control is achieved, but the prediction success rate is low especially for large vehicles
Solution Approach 1:
The patent implements a feedback mechanism where vehicles transmit their occupancy status and movement intentions to the intersection controller, which then provides action instructions back to the vehicles. This closed-loop feedback system replaces unreliable prediction methods with direct communication, allowing vehicles to receive authoritative navigation guidance based on real-time intersection occupancy conditions
Solution Approach 2:
The patent requires vehicles to transmit their occupancy messages and movement requests to the intersection controller before entering the intersection. This preliminary action allows the controller to assess the situation in advance and provide appropriate navigation instructions, eliminating the need for complex real-time prediction of large vehicle movements
3Productivity
If multiple vehicles pass through intersection simultaneously, then traffic efficiency is improved, but collision risk increases
Solution Approach 1:
The patent implements a dynamic control system where the intersection controller continuously receives occupancy messages from vehicles and adjusts navigation instructions in real-time based on changing intersection conditions. This dynamic coordination allows multiple vehicles to pass through the intersection simultaneously when safe, while maintaining collision avoidance through continuous monitoring and adaptive instruction provision
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.