Vehicle Certificate Proxying Via Roadside Units Under Poor Uu Signal
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Solution Overview
Problem
Vehicles face challenges in obtaining a real-name certificate when the Uu interface is unavailable or signal quality is poor, such as in tunnels or basements, hindering access to specific internet of vehicles services.
Innovation Solution
A vehicle-mounted device utilizes a PC5 interface to send a certificate proxy application message to a roadside unit, which forwards the request to a third-party authority for generating and relaying the identity certificate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vehicle-mounted device uses the Uu interface to apply for a real-name certificate, then the certificate application process is standardized and reliable, but the certificate cannot be obtained when the Uu interface is unavailable or signal quality is poor
Solution Approach 1:
The patent introduces a roadside unit as an intermediary to facilitate certificate application when the direct Uu interface is unavailable. The vehicle-mounted device sends the certificate application message to the roadside unit, which then forwards it to the certificate authority, enabling indirect communication path that bypasses the blocked direct interface.
Solution Approach 2:
The patent adds a new communication dimension by utilizing the PC5 interface (vehicle-to-infrastructure direct communication) alongside the traditional Uu interface (vehicle-to-network through base station). This multi-dimensional approach allows the system to switch between different communication paths depending on availability.
2Adaptability or versatility
If the vehicle-mounted device switches to PC5 interface for certificate application, then service access is maintained in poor signal areas, but the communication protocol and process become more complex
Solution Approach 1:
The roadside unit is designed to perform multiple functions: it acts as both a normal infrastructure element providing road-side services and as a certificate application proxy when needed. This multi-functionality reduces the need for separate dedicated hardware or complex vehicle-side processing logic.
Solution Approach 2:
The vehicle-mounted device maintains its standard certificate application logic without needing to implement complex alternative communication protocols. The device simply sends the standard application message, and the system automatically routes it through appropriate interfaces based on availability.
3Reliability
If the real-name certificate is continuously updated to protect user privacy, then privacy protection is improved, but the frequency of certificate renewal increases
Solution Approach 1:
The system performs certificate renewal operations in advance before the current certificate expires. The vehicle-mounted device monitors certificate validity and initiates renewal processes proactively, ensuring continuous valid certificate coverage without service interruption.
Solution Approach 2:
The system ensures continuous certificate validity by overlapping the lifecycle of old and new certificates. The renewal process is designed to maintain at least one valid certificate at all times, providing uninterrupted service while gradually transitioning to updated pseudonyms for enhanced privacy protection.
Data Source
AI summary
A vehicle certificate application method implemented by a vehicle-mounted device includes sending a certificate proxy application message to a roadside unit RSU in response to determining that the Uu interface of the vehicle-mounted device is unavailable or the signal quality of the Uu interface is lower than the threshold. The certificate proxy application message includes certificate application information of a vehicle to which the vehicle-mounted device is mounted. The certificate application information is forwarded by the RSU to a third-party authority. The vehicle-mounted device receives, from the RSU, a certificate proxy application response that includes an identity certificate of the vehicle generated by the third-party authority based on the certificate application information.