Vehicle Communication Frequency Control Against Cockpit EMI
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Solution Overview
Problem
Existing communication systems in vehicles face challenges in improving communication quality due to electromagnetic noise, where reducing overall noise is resource-intensive and degrades communication characteristics.
Innovation Solution
A communication control device measures electromagnetic noise in each frequency band, identifies noise sources, and adjusts communication or operating clock frequencies to avoid noisy bands, thereby improving communication quality without reducing overall noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If processes are implemented to reduce the overall amount of noise, then communication accuracy is improved, but resource consumption increases and communication characteristics are degraded in noisy areas
Solution Approach 1:
The patent applies local quality by measuring and identifying noise sources in specific frequency bands rather than treating all frequencies uniformly. The communication control device measures electromagnetic noise in each frequency band, identifies the frequency band with the largest noise amount, and selectively adjusts clock frequencies only for electrical devices contributing to that specific noisy band. This localized approach improves communication accuracy in affected bands without unnecessarily consuming resources across the entire system.
Solution Approach 2:
The patent implements parameter changes by dynamically adjusting the clock frequency parameter of electrical devices based on measured noise conditions. When noise is detected in a specific frequency band, the control device changes the clock frequency parameter of identified noise-source devices to a different frequency, thereby reducing electromagnetic noise in the communication band and improving communication accuracy without requiring continuous full-system noise reduction processes.
2Measurement precision
If processes are implemented to reduce the overall amount of noise, then communication accuracy is improved, but communication characteristics are degraded due to persistent noise in some areas
Solution Approach 1:
The patent implements feedback by continuously measuring electromagnetic noise in each frequency band, identifying the noise source electrical devices, and adjusting their clock frequencies accordingly. The communication control device establishes a closed-loop control system where noise measurement results feed back into frequency adjustment decisions, enabling adaptive noise reduction that maintains communication reliability while improving accuracy in noisy environments.
Solution Approach 2:
The patent applies local quality by targeting specific frequency bands and specific electrical devices that are noise sources, rather than applying uniform noise reduction across all frequencies and devices. By identifying which electrical devices generate noise in which frequency bands and adjusting only those specific devices' clock frequencies, the system improves communication characteristics in affected bands without degrading performance in other bands.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances communication quality by selectively avoiding noise frequencies and adjusting clock frequencies, resulting in improved accuracy and reduced noise interference.
Implementation Method 1
measures or determines the amount of electromagnetic noise in each frequency band inside a cockpit module
Implementation Method 2
sets the operating clock frequency of that electrical device to a first frequency band that differs from the communication frequency band
Data Source
AI summary
A communication control device is configured to select a communication frequency band for communicating between a vehicle and an external base station when starting communication between the vehicle and the external base station. In selecting the communication frequency band, the communication control device measures or determines the amount of electromagnetic noise in each frequency band inside the cockpit module, and including the communication frequency band. Then, the communication control device identifies an electrical device that is a source of the electromagnetic noise based on frequency bands in which the amount of electromagnetic noise is greater than or equal to a predetermined value. The communication control device sets an operating clock frequency of the electrical device to a first frequency band that differs from the communication frequency band.