V2X Multi-Channel Congestion Control via Interference Observation Window
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Solution Overview
Problem
Conventional multi-channel operation schemes fail to consider adjacent channel interference (ACI) effectively, leading to inefficiencies in traffic congestion control in V2X communication systems.
Innovation Solution
A multi-channel congestion control method is introduced, which configures an interference observation window to acquire channel busy ratio (CBR) information for multiple channels, selects a reference channel based on CBR and priority, and performs congestion control using a reference CBR to mitigate ACI effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-channel operation is implemented to distribute V2X traffic load, then productivity and service diversity are improved, but adjacent channel interference causes transmission reliability to deteriorate
Solution Approach 1:
The patent converts the harmful ACI effect into a beneficial control mechanism by measuring CBR on adjacent channels and using this information to adjust transmission parameters. Instead of ignoring ACI or treating it purely as interference, the system utilizes CBR measurements from channels within the IOW to make intelligent congestion control decisions, thereby transforming the interference problem into a source of useful information for optimizing multi-channel operation.
Solution Approach 2:
The patent implements a feedback mechanism where CBR information from adjacent channels is continuously measured and fed back to the congestion control algorithm. This feedback loop allows the system to dynamically adjust transmission parameters based on real-time channel conditions, including ACI effects, thereby maintaining reliable transmission while benefiting from multi-channel operation.
2Device complexity
If conventional multi-channel operation is used without ACI consideration, then device complexity is reduced, but transmission efficiency deteriorates due to ACI effects
Solution Approach 1:
The patent applies preliminary action by pre-configuring the IOW to include the transmission channel and adjacent channels before congestion control is performed. By establishing the observation window in advance and pre-identifying which channels to monitor, the system prepares the necessary CBR measurement framework beforehand, reducing the complexity of real-time ACI management while maintaining high transmission efficiency.
3Ease of operation
If congestion control is performed only on the transmission channel, then ease of operation is improved, but fairness across multi-channels deteriorates due to ACI effects
Solution Approach 1:
The patent applies universality by creating a congestion control mechanism that serves multiple channels simultaneously through the IOW framework. The same CBR measurement and control logic is applied universally to the transmission channel and all adjacent channels within the IOW, ensuring fair and consistent congestion management across the multi-channel environment while maintaining operational simplicity.
Data Source
AI summary
Disclosed is a multi-channel congestion control method considering adjacent channel interference (ACI). The multi-channel congestion control method includes configuring an interference observation window (IOW) based on the ACI of a transmission channel; acquiring channel busy ratio (CBR) information for multi-channels covered by the IOW; configuring a reference CBR for congestion control based on the CBR information for the multi-channels; and performing the congestion control for the transmission channel based on the reference CBR.