Roadside Wireless Communication Power Optimization
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Solution Overview
Problem
Existing communication systems for roadside wireless communication devices do not effectively reduce power consumption, as they lack the ability to determine the presence of moving bodies on roadways except during red traffic light signals, leading to unnecessary power usage.
Innovation Solution
A communication control apparatus that determines the presence of moving bodies on roadways and adjusts the transmission output of roadside wireless communication devices based on traffic light states, reducing power consumption by lowering or stopping transmissions when no moving bodies are present or when traffic lights indicate it is impossible to advance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the transmission output of the roadside wireless communication apparatus is continuously maintained at a high level, then the communication reliability with moving bodies is improved, but the power consumption increases
Solution Approach 1:
The transmission output of the roadside wireless communication apparatus is made dynamic rather than static. The apparatus adjusts its transmission output level based on real-time detection of moving body presence and traffic light states. When a moving body is detected and the traffic light permits advancement, high transmission output is maintained for reliable communication. When no moving body is present or the traffic light prohibits advancement, the transmission output is reduced or stopped, thereby reducing power consumption while maintaining communication reliability when needed.
2Use of energy by moving object
If the transmission output is reduced during red traffic light signals, then the power consumption is reduced, but the communication capability is insufficient when vehicles are stopped
Solution Approach 1:
The system implements feedback control by continuously monitoring both the traffic light state and the presence of moving bodies. The transmission output is adjusted based on feedback from these sensors. During red traffic light signals, the system detects whether vehicles are actually present on the roadway. If vehicles are detected, the transmission output is maintained at appropriate levels to ensure communication capability. If no vehicles are present, the transmission output is reduced, achieving power savings without compromising communication when needed.
3Device complexity
If the roadside wireless communication apparatus operates without detecting moving body presence, then the device complexity is reduced, but the power consumption cannot be optimized
Solution Approach 1:
The system segments the control function into two independent parts: a moving body detection function using existing infrastructure (cameras, sensors) and a transmission control function. The roadside wireless communication apparatus utilizes detection results from these separate detection systems rather than implementing its own complex detection hardware. This segmentation allows the communication apparatus to optimize power consumption through intelligent control without significantly increasing its own device complexity.
Data Source
AI summary
The present disclosure makes it possible to effectively reduce power consumption of a roadside wireless communication apparatus. A determination means (21) determines whether a moving body exists on a roadway leading to an intersection. A control means (22) controls a transmission output of a wireless signal being output from a wireless communication apparatus (30), based on a lighting state of a traffic light installed at the intersection and a determination result of the determination means (21).