Automatic In-Vehicle Device Association via Position Difference
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Solution Overview
Problem
Existing association systems for in-vehicle devices and portable terminals are complex for users to operate, especially for those unfamiliar with pairing processes.
Innovation Solution
An association system comprising an in-vehicle device, a portable terminal, and a server, where the in-vehicle device sends its ID and position to the server, and the portable terminal sends authentication information including its ID and the received in-vehicle device ID to the server for association, allowing automatic pairing without user intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pairing operations are required for device association, then authentication reliability is improved, but user operation complexity increases
Solution Approach 1:
The system performs automatic association between the in-vehicle device and portable terminal without requiring user pairing operations. The in-vehicle device automatically transmits its ID to nearby terminals, and the terminal automatically sends authentication information to the server, enabling self-service association that maintains security while eliminating complex user operations
Solution Approach 2:
The server acts as an intermediary that receives authentication information from both the in-vehicle device and portable terminal, then performs the association based on position matching. This intermediary approach allows automated authentication while maintaining system reliability through centralized verification
2Ease of operation
If automated association is implemented, then ease of operation is improved, but position matching accuracy requirements increase
Solution Approach 1:
The system changes the parameter for association determination from exact position matching to difference-based matching. Instead of requiring identical position coordinates, the server determines association based on whether the position difference between device and terminal falls within a predetermined threshold, making the system more robust to position measurement variations
Data Source
AI summary
An in-vehicle device includes: an in-vehicle storage unit which stores an in-vehicle device ID as an identifier; a first communication unit which sends the in-vehicle device ID to a portable terminal; a vehicle position acquisition unit; and a second communication unit which sends the in-vehicle device ID and the vehicle position to the server, the portable terminal includes: a portable storage unit which stores a portable terminal ID as an identifier for identifying the portable terminal; a portable terminal position acquisition unit; and an authentication information sending unit which sends, to the server, authentication information, and the server associates the portable terminal ID and the in-vehicle device ID based on a difference between the portable terminal position included in the received authentication information and the received vehicle position.