V2X Multi-Channel Transmission via CBR Threshold Selection
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Solution Overview
Problem
In a multi-channel environment, V2X communication systems face challenges in selecting channels for data transmission to ensure low latency and efficient resource utilization, particularly when providing safety services that require reliable and low-latency communication.
Innovation Solution
A multi-channel transmission method that acquires Channel Busy Ratio (CBR) values for each channel, sets a CBR threshold based on these values, selects a channel candidate group with CBR values less than or equal to the threshold, and transmits data through channels in this group, considering service priority by applying weights to the CBR calculation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a channel is selected based on lowest CBR value only, then channel load distribution is optimized, but high-priority services cannot be guaranteed
Solution Approach 1:
The patent applies different selection criteria to different service types. For high-priority services, channels are selected based on whether CBR is below a first threshold, ensuring reliable low-latency transmission. For other services, channels are selected based on whether CBR is below a second threshold, optimizing overall channel load distribution. This local differentiation resolves the contradiction by ensuring high-priority services get guaranteed channels while other services contribute to load balancing.
Solution Approach 2:
The patent segments the channel selection process into multiple stages: first identifying channels suitable for high-priority services, then from the remaining channels selecting those suitable for other services. This segmentation ensures that high-priority services are not compromised for the sake of overall load distribution, while still achieving good load balancing across the network.
2Productivity
If channels are selected without considering service priority, then channel utilization is maximized, but latency-critical services suffer
Solution Approach 1:
The patent implements service-specific channel selection thresholds. High-priority services use a first CBR threshold that ensures low latency, while other services use a second CBR threshold that maximizes channel utilization. This local quality approach ensures that latency-critical services are not degraded for the sake of overall utilization metrics.
3Ease of operation
If all services use the same channel selection criterion, then selection simplicity is maintained, but service differentiation is lost
Solution Approach 1:
The patent maintains operational simplicity by using straightforward CBR threshold comparisons, but enhances adaptability by implementing different thresholds for different service priorities. The selection process remains simple (compare CBR to threshold), but the system adapts to different service requirements through the differentiated threshold values.
Data Source
AI summary
A multi-channel transmission method of a V2X communication apparatus is disclosed. A multi-channel transmission method of a V2X communication apparatus according to an embodiment of the present disclosure includes acquiring CBR values for each of a plurality of channels; setting a CBR threshold on the basis of the CBR values; selecting a channel candidate group on the basis of the CBR threshold; and transmitting data through a channel included in the channel candidate group.