V2X Message Feedback Control for Channel Congestion Relief
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Solution Overview
Problem
The limited frequency spectrum in V2X communication systems leads to channel congestion, resulting in decreased communication performance and increased packet error rates and latency, which affects the reliability and efficiency of vehicle-to-everything (V2X) communications.
Innovation Solution
A feedback-based mechanism is implemented to dynamically adjust the transmission frequency of V2X messages based on the channel reliability, using reception indicators and priority thresholds to optimize resource allocation and reduce channel load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional V2X messages are transmitted for cooperative driving functions, then driver assistance and automated driving performance is improved, but channel load increases leading to congestion and decreased communication performance
Solution Approach 1:
The patent implements dynamic transmission priority adjustment based on channel conditions. The transmission priority of V2X messages is not fixed but adapts according to feedback about channel reliability, allowing the system to optimize between transmission frequency and channel load dynamically
Solution Approach 2:
The patent introduces a feedback mechanism where receivers send acknowledgment information back to transmitters. This feedback about message reception status enables transmitters to assess channel reliability and adjust their transmission behavior accordingly, creating a closed-loop control system
2Reliability
If V2X messages are transmitted more frequently to ensure reliable delivery, then communication reliability is improved, but channel congestion increases and latency increases
Solution Approach 1:
The transmission interval and frequency are made dynamic rather than static. The system adjusts transmission timing based on real-time channel reliability assessments from feedback, transmitting more frequently when needed and less frequently when channel conditions are good, thereby reducing unnecessary latency
Solution Approach 2:
The patent changes transmission parameters (priority level, transmission frequency) based on channel conditions. By adjusting these parameters dynamically according to feedback about message reception success, the system optimizes the balance between delivery reliability and transmission latency
3Productivity
If the frequency spectrum reserved for V2X communication is increased to reduce congestion, then communication performance is improved, but available spectrum resources are depleted
Solution Approach 1:
Instead of increasing spectrum allocation, the patent changes operational parameters within the existing spectrum. By adjusting transmission priority levels and timing based on channel conditions, the system achieves better throughput efficiency without requiring additional frequency resources
Data Source
AI summary
A method for V2X communication. The method includes transmitting, via at least one V2X radio channel, at least one first V2X message object; receiving, via the at least one V2X radio channel, at least one feedback associated with a reception status of the at least one first V2X message object; deciding, based on the at least one feedback, whether to transmit at least one second V2X message object; and transmitting, via the at least one V2X radio channel, the at least one second V2X message object, if the decision indicates that the at least one second V2X message object is to be transmitted.