Wireless Video Device Human Body Detection Standby Power Reduction
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Solution Overview
Problem
Conventional wireless communication techniques face challenges in reducing power consumption during standby periods, especially in small-scale networks, and fail to effectively utilize human-sensitive sensors for power-saving in wireless video transmission and reception systems.
Innovation Solution
The implementation of a wireless video transmission and reception system that employs a human body detection unit to limit the number of communication channels searched during startup verification, transitioning between normal and specific standby modes based on user presence, thereby reducing power consumption and accelerating startup times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the device searches all communication channels during startup verification to ensure reliable connection, then the reliability of connection is improved, but the startup time increases
Solution Approach 1:
The system performs preliminary channel scanning and stores channel information in advance during standby mode. When startup is requested, the device retrieves pre-stored channel information instead of scanning all channels again, significantly reducing startup verification time while maintaining connection reliability through the use of previously validated channels.
2Speed
If the device performs frequent channel scanning during standby to maintain connection readiness, then the connection responsiveness is improved, but the power consumption increases
Solution Approach 1:
The system performs channel scanning periodically during standby mode rather than continuously. The scanning operation is executed at predetermined intervals, allowing the device to maintain connection readiness while significantly reducing power consumption compared to continuous scanning. The periodic scanning ensures the device can quickly respond to startup requests while conserving energy during idle periods.
3Use of energy by moving object
If the device reduces channel scanning frequency during standby to save power, then the power consumption is reduced, but the startup verification time increases
Solution Approach 1:
The system performs preliminary channel scanning and stores channel information in advance during standby mode. When startup is requested, the device retrieves pre-stored channel information instead of scanning all channels again, significantly reducing startup verification time while maintaining connection reliability through the use of previously validated channels.
Solution Approach 2:
The system performs channel scanning periodically during standby mode rather than continuously. The scanning operation is executed at predetermined intervals, allowing the device to maintain connection readiness while significantly reducing power consumption compared to continuous scanning. The periodic scanning ensures the device can quickly respond to startup requests while conserving energy during idle periods.
4Measurement precision
If the device searches all communication channels during startup to ensure complete channel verification, then the measurement precision of channel availability is improved, but the productivity of startup process decreases
Solution Approach 1:
The system performs preliminary channel scanning and stores channel information in advance during standby mode. When startup is requested, the device retrieves pre-stored channel information instead of scanning all channels again, significantly reducing startup verification time while maintaining connection reliability through the use of previously validated channels.
Solution Approach 2:
The system focuses verification efforts on specific channels of interest rather than uniformly scanning all channels. By identifying and prioritizing relevant communication channels based on historical data and current context, the device achieves accurate channel verification for critical channels while reducing overall verification time, thereby improving startup process efficiency without sacrificing necessary verification accuracy.
Data Source
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AI summary
A technique is provided for using, in a wireless video transmission device (302) and a plurality of wireless video reception devices (306, 307, 308, 309) which intermittently perform signal reception processing within standby periods, a human body detection unit (17) to accelerate the start-up of the wireless video transmission and reception devices (302, 306-309). When the presence of a person is detected by the human body detector (17), a person detection signal is sent to a wireless video reception device (306) or the transmission device (302) to thereby limit usable communication channel candidates in number. The limited number of usable channel candidates are then used to perform intermittent signal reception, thereby shortening the searching time cycle of such intermittent reception within a standby period, thus lessening the startup time from the standby state between the wireless video transmission and reception devices (302, 306) and also reducing standby power thereof.