Wireless Communication Apparatus Intermittent Reception Control
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Solution Overview
Problem
Wireless communication apparatuses for keyless entry have a prolonged standby period and low data-transfer amounts, making it difficult to shorten the intermittent reception period and reduce consumption current due to the intermittent operation mode.
Innovation Solution
A wireless communication apparatus with a control unit that generates control signals to set an intermittent reception period and control the RF unit's operation, including a signal judgment unit, timer control unit, and noise detection units to determine the existence of wireless signals and adjust the reception period accordingly, allowing the RF unit to stop or continue reception based on signal presence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If intermittent operation is used to reduce consumption current, then power consumption is reduced, but the intermittent reception period cannot be shortened and communication reliability deteriorates
Solution Approach 1:
The patent applies dynamics by making the reception period adjustable rather than fixed. The control unit dynamically changes the reception period length based on whether a wireless signal is detected: using a first (longer) reception period when no signal is present to ensure reliable detection, and a second (shorter) reception period when a signal is detected to reduce power consumption during active communication. This dynamic adaptation resolves the contradiction between power savings and communication reliability.
2Speed
If the intermittent reception period is shortened to improve responsiveness, then communication speed is improved, but power consumption increases
Solution Approach 1:
The patent uses dynamics to adjust the reception period based on signal detection state. When a wireless signal is detected, the system switches to a shorter second reception period that improves responsiveness and communication speed. When no signal is detected, it uses a longer first reception period to save power. This dynamic adjustment allows the system to achieve fast response when needed without continuously consuming high power.
Solution Approach 2:
The patent implements periodic action by using different reception period patterns based on operational state. The system alternates between a first reception period (when no signal is detected) and a second reception period (when signal is detected), creating adaptive periodic cycles that optimize both speed and power consumption according to actual communication needs.
3Reliability
If the reception period is extended to ensure signal detection, then communication reliability is improved, but the standby period becomes excessively long and system efficiency decreases
Solution Approach 1:
The patent applies dynamics by adjusting the reception period length based on signal detection status. When no wireless signal is detected, the system uses a first reception period that is longer than a predetermined threshold, ensuring reliable signal detection. When a signal is detected, it switches to a second reception period that is shorter than the threshold, reducing unnecessary standby time and improving system efficiency. This dynamic adjustment eliminates the need for excessively long fixed reception periods.
Data Source
AI summary
According to an embodiment, the control unit produces a first control signal and a second control signal. The first control signal is to set an intermittent reception period. The second control signal is to control a start-up of reception of a wireless signal. When the reception processing is implemented during the intermittent reception period, the RF unit stops in accordance with an instruction of the control unit after the reception processing signal is outputted, the intermittent reception period is awoken. When the reception processing exceeds the intermittent reception period, the RF unit continues the reception, and stops in accordance with the instruction of the control unit after the reception processing signal is outputted.