Roadside Navigation Unit Switching for Autonomous Vehicles
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Solution Overview
Problem
Current navigation systems for self-driving vehicles lack seamless switching and security when transitioning between roadside navigation units (RSUs), leading to potential safety issues during automatic driving scenarios.
Innovation Solution
A method for switching RSUs involves an onboard unit (OBU) receiving a switching notification from a first RSU, requesting and obtaining local path information from a second RSU, and switching its home RSU accordingly, enabling seamless transitions and enhanced security through negotiation between RSUs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If distributed information collection and routing decision-making is implemented, then computing complexity of navigation algorithm is reduced and real-time performance is improved, but seamless switching and takeover when self-driving vehicle passes through different RSUs cannot be implemented
Solution Approach 1:
The patent applies preliminary action by having the current RSU send a switching preprocessing message to the target RSU before the vehicle actually switches. This message includes vehicle identification information and path information, allowing the target RSU to prepare for the incoming vehicle in advance, ensuring seamless takeover without compromising real-time performance
Solution Approach 2:
The patent implements feedback through a switching notification message sent from the current RSU to the target RSU after the vehicle has switched. This feedback mechanism allows the target RSU to confirm successful takeover and update its state, ensuring reliable seamless switching while maintaining the distributed real-time architecture
2Device complexity
If distributed information collection and routing decision-making is implemented, then computing complexity of navigation algorithm is reduced, but security of self-driving vehicle cannot be ensured
Solution Approach 1:
The patent uses switching preprocessing messages and switching notification messages as intermediaries between RSUs to coordinate vehicle handover. These standardized message exchanges ensure secure transitions by verifying vehicle identity and path information, maintaining vehicle security while preserving the low-complexity distributed architecture
3Reliability
If RSU switching is implemented for self-driving vehicles, then seamless switching can be achieved, but additional communication overhead and system complexity are introduced
Solution Approach 1:
The patent segments the RSU switching process into distinct phases: a preprocessing phase where the current RSU sends switching preprocessing messages to the target RSU, and a notification phase where switching confirmation is exchanged. This segmentation organizes the complexity into manageable, standardized steps that ensure seamless switching while keeping system implementation structured and controllable
Data Source
AI summary
Embodiments of the present invention provide a method for switching a roadside navigation unit in a navigation system. The method includes: receiving, by an OBU, a switching notification message from a first RSU, where the switching notification message is used to instruct the OBU to prepare to switch a home RSU of the OBU from the first RSU to a second RSU; sending, by the OBU, a registration request to the second RSU to request to obtain local path information of the OBU within a coverage area of the second RSU; receiving, by the OBU, the local path information; and switching, by the OBU, the home RSU of the OBU from the first RSU to the second RSU according to the local path information.