Optical Signal Receiver Intermittent Mode Power Reduction
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Solution Overview
Problem
Existing optical signal receivers for visible light communication systems face inefficiencies in power consumption, as they continue to receive signals even when the same information is transmitted repeatedly and consume power during standby states without receiving optical signals.
Innovation Solution
The optical signal receiver operates in either intermittent or continuous reception modes based on detecting the repetition of frames and the presence of an optical signal, transitioning between modes to minimize power usage, using a light receiving unit and controller to manage reception phases such as non-irradiation, irradiation, search, period specifying, and information acquisition phases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the optical signal receiver continuously receives optical signals to ensure information is not missed, then the reliability of information reception is improved, but power consumption increases
Solution Approach 1:
The optical signal receiver dynamically switches between continuous reception mode and intermittent reception mode based on whether optical signals are detected. When no optical signal is present for a predetermined period, the receiver transitions to intermittent mode where it only periodically checks for signals, thereby adapting its operation to actual needs and reducing power consumption while maintaining reliable reception when signals are available
Solution Approach 2:
In intermittent reception mode, the receiver performs optical signal detection at periodic intervals rather than continuously. This periodic action allows the system to consume less power during periods when no optical signals are being transmitted, while still ensuring that signals are detected when they appear
2Speed
If the optical signal receiver monitors optical signals during standby state to detect signal presence, then the responsiveness to signal transmission is improved, but power consumption during standby increases
Solution Approach 1:
During standby state, the receiver monitors optical signals periodically rather than continuously. The control unit determines whether to perform optical signal reception based on predetermined conditions, such as whether a predetermined period has elapsed since the last signal detection. This periodic monitoring reduces standby power consumption while maintaining the ability to quickly detect when optical signals begin transmission
3Reliability
If the optical signal receiver continuously processes repeated frames to ensure no information is missed, then the completeness of information reception is improved, but power consumption increases due to redundant processing
Solution Approach 1:
The receiver extracts and processes only the essential components of optical signal frames. When frames are repeatedly transmitted with the same information, the system identifies this repetition and avoids redundant processing of identical data, thereby reducing processing power consumption while still ensuring that the information is completely received and acknowledged
Solution Approach 2:
The system changes its processing parameters based on the detected state of optical signal transmission. When repeated frames are detected, the receiver adjusts its processing intensity and frequency, reducing the processing load for redundant frames while maintaining complete information reception. This dynamic parameter adjustment optimizes power consumption based on actual information content
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
This approach significantly reduces power consumption by intermittently receiving signals when information is repetitive and transitioning to continuous mode only when necessary, thereby optimizing battery life in portable devices.
Implementation Method 1
a light receiving unit configured to receive the optical signal
Data Source
AI summary
An optical signal receiver receives an optical signal superimposed on illumination light from an illumination apparatus which repetitively transmits as the optical signal a frame including predetermined information and a preamble indicating the start of the frame. Further, the optical signal receiver includes a light receiving unit configured to receive the optical signal, and a controller configured to control the light receiving unit based on the optical signal received by the light receiving unit such that the optical signal receiver operates in either one of an intermittent reception mode of intermittently receiving the optical signal and a continuous reception mode of continuously receiving the optical signal.