Frequency Band Computing Unit for Wireless Keyless Entry
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems for remote keyless entry systems face reliability issues due to frequent frequency band changes, even in good communication environments, leading to decreased reliability and increased system complexity.
Innovation Solution
A multichannel wireless communication system with a frequency band computing unit that learns and selects the most reliable frequency band based on successful communication history, automatically changing the frequency band only when deterioration is estimated, thereby maintaining high communication reliability with a simple configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the frequency band is changed each time the user performs a switch operation, then the system responds to user operations, but the reliability of communication decreases due to unnecessary frequency band changes
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the frequency band selection based on communication environment assessment. Instead of changing frequency band for every switch operation, the system evaluates communication quality metrics and only changes frequency bands when deterioration is detected, thus maintaining reliability while still responding to user operations.
Solution Approach 2:
The system implements feedback mechanisms by monitoring communication environment conditions and using this information to determine whether to change frequency bands. The receiver provides feedback about communication quality, and the transmitter uses this feedback to make informed decisions about frequency band changes, preventing unnecessary changes that would harm reliability.
2Reliability
If the frequency band is changed to avoid noise interference, then communication reliability improves, but the system complexity increases due to need to monitor all receiving electric field intensities
Solution Approach 1:
The patent extracts the essential function of frequency band selection from complex monitoring of all receiving electric field intensities. Instead of requiring the receiver to monitor and process all time slot intensities, the system extracts only the necessary information to assess communication environment and makes frequency band changes at the transmitter side based on simplified criteria.
Solution Approach 2:
The patent introduces an intermediary approach by using a frequency band selection unit that acts as a mediator between the complex communication environment monitoring and the frequency band changing action. This intermediary simplifies the decision-making process by using predefined criteria and thresholds rather than requiring complex real-time analysis of all communication parameters.
3Adaptability or versatility
If special switch operations trigger frequency band changes, then the system handles special operations, but it becomes difficult to determine the type of switch operation particularly special switch operations
Solution Approach 1:
The patent applies preliminary action by establishing clear distinctions between normal and special switch operations before frequency band changes occur. The system defines specific patterns (e.g., double short press, long press) as special operations and handles them with predetermined frequency band selection strategies, making detection and classification straightforward rather than ambiguous.
Data Source
AI summary
A mobile device (100) includes a transmitting unit (130) that, each time an ON operation of a switch (110) in a first mode is performed, transmits a wireless signal corresponding to the first mode ON operation by changing a frequency band among three or more frequency bands and that, when an ON operation of the switch (110) in a second mode is performed, transmits a wireless signal, corresponding to the second mode ON operation, in the frequency band selected at that time. The transmitting unit (130) includes a frequency band computing unit (121) that selects one of the three or more frequency bands through a computation for changing a communication environment when the second mode ON operation of the switch (110) is repeatedly performed. A receiver (220) the in-vehicle device (200) receives a wireless signal transmitted from the transmitting unit (130) and recognizes command information allocated in advance in correspondence with each ON operation mode of the switch (110).