V2X Signal Interval Control Using Sound-Based Risk Detection
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Solution Overview
Problem
Existing V2X communication systems lack efficient methods to assess and mitigate risks to vulnerable roadside users (VRUs) by optimizing signal transmission intervals based on surrounding risk environments.
Innovation Solution
A method and apparatus for calculating quantified risk levels based on sound signals from neighboring devices, determining optimized transmission intervals, and adjusting signal transmission modes to enhance VRU safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If V2X communication uses fixed transmission intervals for safety messages, then system simplicity is maintained, but safety reliability deteriorates because transmission does not adapt to varying risk levels
Solution Approach 1:
The transmission interval is made dynamic by adjusting it based on calculated risk levels. When risk level is high, the transmission interval is reduced to provide more frequent updates. When risk level is low, the transmission interval is increased to reduce unnecessary transmissions. This dynamic adjustment resolves the contradiction by adapting the system behavior to actual safety needs.
Solution Approach 2:
The system changes the transmission interval parameter based on risk level calculations. By modifying this key parameter dynamically, the system achieves reliable safety communication without requiring complex multi-parameter control mechanisms, thus resolving the contradiction between reliability improvement and complexity increase.
2Reliability
If V2X communication transmits messages continuously to ensure safety, then safety coverage is improved, but energy consumption increases
Solution Approach 1:
Instead of continuous transmission, the system uses periodic transmission with variable intervals. The transmission occurs periodically at intervals adjusted according to risk levels. This resolves the contradiction by eliminating unnecessary continuous transmissions while maintaining adequate safety coverage through risk-adaptive periodic updates.
Solution Approach 2:
The transmission interval parameter is changed based on risk level to optimize energy consumption. When risk is low, longer intervals reduce energy usage. When risk is high, shorter intervals maintain safety reliability. This parameter adaptation allows the system to achieve both low energy consumption and high reliability.
3Use of energy by moving object
If V2X communication uses long transmission intervals to save energy, then energy efficiency is improved, but response time to emergency situations deteriorates
Solution Approach 1:
The transmission interval is dynamically adjusted based on detected risk conditions. In normal conditions, long intervals maintain energy efficiency. When emergency conditions are detected through risk level calculation, the system switches to shorter intervals to improve response speed. This dynamic behavior resolves the contradiction by adapting transmission frequency to actual needs.
Solution Approach 2:
The system uses feedback from risk level calculations to adjust transmission intervals. Risk level information feeds back into the transmission control mechanism, allowing the system to extend intervals when safe (energy efficiency) and reduce intervals when risks are detected (emergency response). This feedback loop resolves the contradiction between energy efficiency and response speed.
4Reliability
If V2X communication transmits detailed safety information frequently, then safety coverage is improved, but information processing load increases
Solution Approach 1:
The system transmits safety information periodically rather than continuously. The periodic transmission with risk-adaptive intervals reduces the total amount of information processing while maintaining adequate safety coverage. This resolves the contradiction by eliminating redundant processing during low-risk periods while maintaining comprehensive coverage during high-risk periods.
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
Enables quick and analytical assessment of proximity and risk levels, effectively managing transmission intervals to enhance safety for vulnerable roadside users by adjusting signal characteristics and modes.
Implementation Method 1
calculate risk levels based on signal characteristics such as signal intensities and Doppler frequency shifts
Data Source
AI summary
Disclosed are a method for a first vehicle to everything (V2X) terminal to transmit a first signal and a device for same in a wireless communication system according to various embodiments. The method comprises the steps of: receiving second signals from neighboring devices; and transmitting the first signal on the basis of the second signals, wherein the second signals are sound signals generated from the neighboring devices, and the first V2X terminal calculates a danger level on the basis of signal characteristics of the sound signals and determines the transmission interval of the first signal on the basis of the danger level.