Vehicle Control Time Synchronization via Elapsed Time Tracking
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Solution Overview
Problem
Existing time synchronization methods between electronic devices do not account for elapsed time, resulting in reduced precision.
Innovation Solution
A vehicle control system that includes a first electronic device and a second electronic device, where the first device generates and transmits time information and elapsed time information, allowing the second device to adjust its time count based on the received information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If elapsed time information is transmitted to achieve high-precision time synchronization, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The time synchronization process is segmented into distinct components: a generation unit that creates time information, a transmission unit that sends both time information and elapsed time information, and an adjustment unit that processes this data. By dividing the synchronization mechanism into these functional segments, the system achieves precise time measurement through elapsed time tracking without creating a monolithic complex system.
Solution Approach 2:
Elapsed time information acts as an intermediary element that bridges the time gap between message generation and reception. This intermediary data allows the receiving device to accurately calculate synchronization offset without requiring direct complex interaction between all system components, thereby improving precision while managing system complexity.
2Measurement precision
If elapsed time information is transmitted to achieve high-precision time synchronization, then measurement precision is improved, but loss of information increases
Solution Approach 1:
The system performs preliminary recording of the elapsed time from message generation to transmission before the actual time synchronization occurs. By capturing this time offset information in advance and including it with the time synchronization message, the system prevents information loss that would otherwise occur during transmission delays, enabling precise synchronization reconstruction at the receiving end.
Data Source
AI summary
Provided is a vehicle control system that includes a first electronic device and a second electronic device. The first electronic device includes: a first timer unit; a generation unit that generates time information indicating time counted by the first timer unit; and a first transmission unit that transmits the time information to the second electronic device, and also transmits, to the second electronic device, elapsed time information indicating elapsed time from the start of generation of the time information till transmission of the time information generated. The second electronic device includes: a second timer unit; a reception unit; and an adjustment unit that adjusts time counted by the second timer unit based on the time information and the elapsed time information received by the reception unit.