V2X Message Control via RSU PDCP SDU Signaling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face challenges in efficiently controlling Vehicle-to-Everything (V2X) message transmission, particularly in scenarios where multiple Mobile Network Operators (MNOs) share the same spectrum, leading to inefficient use of radio resources due to varying V2X message transmission properties across different MNOs.
Innovation Solution
A method involving a first Road Side Unit (RSU) transmitting PC5 interface congestion information to an ITS server, which selects and broadcasts a second V2X message indicating control information via a Packet Data Convergence Protocol (PDCP) Service Data Unit (SDU), allowing for controlled V2X message transmission based on geographical and temporal parameters, thereby optimizing resource usage across shared spectrum.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple MNOs share the same spectrum for V2X communication, then spectrum utilization is improved, but radio resource efficiency deteriorates due to varying V2X message transmission properties
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting V2X message transmission parameters (such as transmission power, message interval, or resource allocation) based on the congestion level of the PC5 interface. When congestion is detected, the system modifies transmission parameters to reduce resource waste while maintaining essential V2X communication functionality, thereby resolving the contradiction between spectrum sharing and resource efficiency.
Solution Approach 2:
The patent implements a feedback mechanism where the RSU monitors PC5 interface congestion status and sends control information back to control V2X message transmissions. This closed-loop feedback system allows the network to respond to actual congestion conditions, optimizing radio resource usage while maintaining spectrum sharing benefits by adjusting transmission behavior based on real-time interface status.
2Area of stationary object
If V2X message transmission is allowed freely across shared spectrum, then communication coverage is improved, but resource congestion worsens
Solution Approach 1:
The patent applies preliminary anti-action by proactively controlling V2X message transmissions before severe congestion occurs. The RSU monitors interface conditions and preemptively adjusts or restricts V2X message transmissions when congestion is anticipated or detected, preventing the harmful effects of resource exhaustion while maintaining adequate communication coverage through coordinated transmission management.
3Measurement precision
If V2X control information is broadcasted frequently, then control accuracy is improved, but network overhead increases
Solution Approach 1:
The patent implements periodic action by broadcasting V2X control information at optimized intervals rather than continuously or too frequently. The system determines appropriate broadcast periods based on congestion conditions and control requirements, maintaining sufficient control accuracy while reducing unnecessary network overhead through rhythmically timed control message transmissions.
Data Source
AI summary
An embodiment of the present invention relates to a method for transmitting and receiving a vehicle to everything (V2X) message of a first road side unit (RSU) in a wireless communication system, the method comprising the steps of transmitting, to an ITS server, information associated with PC5 interface congestion; after transmitting the information associated with PC5 interface congestion, receiving a first V2X message; and broadcasting a second V2X message on the basis of the first V2X message, wherein the second V2X message indicates that the second V2X message is control information via a packet data convergence protocol (PDCP) service data unit (SDU).