In-Vehicle Device Control System Frequency Priority
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Solution Overview
Problem
Existing in-vehicle device control systems face increased current consumption due to frequent radio communication attempts to counter jamming, especially when the vehicle is stationary, leading to battery power depletion.
Innovation Solution
An in-vehicle device control system that designates a communication frequency with a higher priority order for each checkup, reducing the number of communication attempts and susceptibility to jamming by switching frequencies only when necessary, thereby minimizing current consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the request signal is transmitted multiple times at fixed time intervals to counter jamming, then the radio communication reliability is improved, but the current consumption increases
Solution Approach 1:
The patent changes the communication frequency parameter dynamically. When jamming is detected or to prevent susceptibility to jamming, the system switches to a different communication frequency, allowing successful checkup operations without repeatedly transmitting on the same frequency, thus reducing current consumption while maintaining reliability
Solution Approach 2:
The system dynamically adjusts communication parameters by switching frequencies based on checkup results. Instead of fixed repeated transmissions, the system adapts its communication approach by changing frequency, reducing unnecessary transmissions and energy consumption while maintaining communication reliability
2Reliability
If the request signal is transmitted frequently to ensure successful checkup, then the checkup success rate is improved, but the battery power consumption increases
Solution Approach 1:
The patent applies parameter changes by switching communication frequencies when checkup fails or to prevent jamming susceptibility. This allows the system to achieve successful checkups with fewer transmissions by adapting the frequency parameter, thereby reducing battery power consumption while maintaining or improving checkup success rates
3Object-affected harmful factors
If multiple communication frequencies are used to counter jamming, then the susceptibility to jamming is reduced, but the number of communication attempts increases
Solution Approach 1:
The patent changes the communication frequency parameter when checkup fails or when jamming is suspected. Instead of trying multiple frequencies in sequence, the system switches to a different frequency for the next checkup attempt, reducing the total number of communication attempts while maintaining resistance to jamming
Solution Approach 2:
The system dynamically switches communication frequencies based on checkup outcomes rather than attempting multiple frequencies statically. This dynamic approach reduces the number of communication attempts needed while maintaining protection against jamming through adaptive frequency selection
Data Source
AI summary
In an in-vehicle device control system, a vehicle-side unit mounted in a vehicle controls an in-vehicle device in accordance with a result of checkup about a portable device performed by mutual communications, in which the portable device returns a response signal in response to a request signal transmitted from the vehicle-side unit. An ECU of the vehicle-side unit checks whether it is a regular checkup timing, and performs an exterior checkup if it is determined to be the regular checkup timing. The ECU sets in this case a communication frequency, which is higher in priority order, as a communication frequency to be designated to the portable device.