Autonomous Vehicle Intersection Priority via Concentric Broadcast Zones
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Solution Overview
Problem
Autonomous vehicles face challenges in safely navigating road intersections without direct communication with each other or a central station, particularly in complex scenarios where traditional methods are costly and inefficient.
Innovation Solution
Each autonomous vehicle uses a map with defined information receiving and broadcasting circles to determine priority for passing through intersections based on received traffic information, allowing local decision-making without central station intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If autonomous vehicles communicate directly with each other or use a central station to coordinate intersection passage, then collision prevention is achieved, but system complexity and communication costs increase
Solution Approach 1:
Each autonomous vehicle independently determines whether to proceed or stop at the intersection by evaluating its own position, speed, and the received broadcast information from other vehicles, without requiring centralized coordination or direct peer-to-peer communication protocols
Solution Approach 2:
The patent extracts only the essential passage priority information from other vehicles through broadcast messages, allowing each vehicle to make local decisions without processing complete vehicle-to-vehicle communication data, thereby reducing communication overhead while maintaining safety
2Reliability
If autonomous vehicles use extensive communication protocols to coordinate at intersections, then safety is improved, but radio band usage and communication overhead increase
Solution Approach 1:
Vehicles broadcast their passage priority information periodically or at key moments (when approaching the intersection), rather than maintaining continuous communication, thereby reducing radio band usage while ensuring safety-critical information is transmitted
Solution Approach 2:
The system extracts only the necessary passage priority information from broadcast messages, allowing vehicles to make decisions with minimal communication data, thereby reducing overall radio band consumption while maintaining safety
3Reliability
If autonomous vehicles rely on central station coordination for intersection passage, then collision prevention is achieved, but system dependency and response time increase
Solution Approach 1:
Each vehicle autonomously determines its passage priority by evaluating its own state and the broadcast information from other vehicles, enabling immediate local decision-making without waiting for central station responses, thereby reducing response time while maintaining collision prevention
Solution Approach 2:
Vehicles broadcast their passage priority information in advance before reaching the intersection, allowing other vehicles to prepare their decisions ahead of time, thereby reducing actual response time at the intersection while maintaining safety
Data Source
AI summary
A method and a system for at least two autonomous vehicles to safely pass through a road intersection are provided. The method includes providing an information receiving circle in each of the maps circling the road intersection, providing a broadcasting circle circled by the information receiving circle concentrically, circling a road intersection, traveling all autonomous vehicles toward the road intersection and into the information receiving circle, traveling one of the autonomous vehicles into the broadcasting circle for broadcasting traffic information, receiving traffic information of the autonomous vehicle traveling in the broadcasting circle by the other autonomous vehicle, and determining which autonomous vehicle passes through the road intersection first according to the traffic information broadcasted by the autonomous vehicle. When the other autonomous vehicle makes a determination to let the autonomous vehicle pass first, the other autonomous vehicle stops before the intersection until the autonomous vehicle has passed through the road intersection.