VRU Sidelink Safety Messaging With Risk-Based Power and Interval Control
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Solution Overview
Problem
Existing wireless communication systems face challenges in maximizing the transmission efficiency and safety of safety messages for vulnerable road users (VRUs) in risk situations, particularly in sidelink communication scenarios.
Innovation Solution
VRUs transmit state information to a base station based on mobility and surrounding information, receiving reconfiguration information for transmission parameters, and adjust transmission power and interval accordingly to enhance safety message delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If VRUs transmit safety messages using fixed transmission parameters, then the communication system is simple to operate, but the transmission efficiency and safety cannot be maximized in risk situations
Solution Approach 1:
The patent implements dynamic transmission parameters where the base station adjusts transmission power and interval based on risk situations. The system transitions from static fixed parameters to dynamic adjustable parameters, allowing optimization of safety message transmission reliability when VRUs are in risk situations while maintaining simplicity during normal operations.
Solution Approach 2:
The patent changes transmission parameters (power and interval) based on risk situation detection. When a VRU detects a risk situation, the base station receives this information and reconfigures transmission parameters accordingly, allowing the system to adapt parameter values dynamically to improve transmission reliability without permanently increasing complexity.
2Productivity
If VRUs increase transmission power and decrease transmission interval in risk situations, then transmission efficiency improves, but energy consumption increases
Solution Approach 1:
The patent applies partial action by increasing transmission power and decreasing interval only when necessary (in risk situations) rather than continuously. The base station configures specific parameter adjustments based on detected risk situations, allowing the system to achieve high transmission efficiency when needed while avoiding excessive energy consumption during normal conditions.
Solution Approach 2:
The system uses feedback mechanisms where the VRU transmits risk situation information to the base station, which then provides reconfiguration information for transmission parameters. This closed-loop feedback allows the system to adjust energy consumption based on actual transmission needs, optimizing the balance between productivity and energy use.
3Reliability
If the base station reconfigures transmission parameters for all VRUs, then overall safety is improved, but system complexity and signaling overhead increase
Solution Approach 1:
The patent applies local quality by providing differentiated transmission parameter configurations to different VRUs based on their individual risk situations. The base station determines which VRUs are in risk situations and provides reconfiguration information selectively, rather than uniformly to all VRUs, thus improving overall safety while minimizing unnecessary complexity and signaling overhead.
Data Source
AI summary
Disclosed are a method by which a VRU transmits a safety message in a wireless communication system, and an apparatus therefor, the method comprising the steps of: transmitting state information to a base station on the basis of mobility information; receiving reconfiguration information about transmission parameters from the base station; and transmitting a safety message on the basis of the reconfiguration information, wherein the state information is included in a UEAssistanceInformation message and transmitted if a collision risk is predicted according to peripheral information and the mobility information, and the safety message is transmitted on the basis of transmission power and a transmission period that are changed according to the reconfiguration information.