V2X Channel Selection via CBR Threshold Grouping
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Solution Overview
Problem
In V2X communication, selecting an appropriate transmission channel with low channel load is crucial to avoid latency, especially in multi-channel environments where high reliability and safety services are essential.
Innovation Solution
A method for determining a transmission channel based on CBR values, where channels with CBR values below a set threshold are grouped into candidate sets, and the channel with the lowest CBR within these sets is selected, with the number and size of these sets adjusted according to service priority, allowing for efficient channel resource allocation and priority-based transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple channels are used to provide various V2X services, then service diversity and capacity are improved, but channel selection complexity and latency increase
Solution Approach 1:
The patent segments the channel selection process into multiple stages: first dividing channels into candidate groups based on CBR thresholds, then selecting specific channels within each group. This hierarchical segmentation reduces the complexity of evaluating all channels individually while maintaining service diversity across multiple frequency bands.
Solution Approach 2:
The patent dynamically adjusts CBR threshold parameters based on service priority levels. High-priority services use stricter thresholds to ensure reliable transmission, while lower-priority services can tolerate higher thresholds. This parameter adaptation allows the system to handle diverse service requirements without increasing overall system complexity.
2Reliability
If channels with low CBR are selected for transmission, then transmission reliability is improved, but channel availability and load distribution may be reduced
Solution Approach 1:
The patent implements dynamic channel group formation where candidate channel groups are recreated in each transmission opportunity based on current CBR measurements. This dynamic approach allows the system to adapt to changing channel conditions, ensuring that reliable channels are selected when available while maintaining flexibility to use alternative channels when conditions change, thus balancing reliability with channel availability.
Solution Approach 2:
The patent performs preliminary classification of channels into candidate groups before actual transmission decisions. By pre-filtering channels based on CBR thresholds and organizing them into candidate groups, the system prepares multiple viable transmission options in advance, ensuring both reliability (through low-CBR selection) and availability (through pre-prepared alternative groups).
Data Source
AI summary
Disclosed is a data transmission method of a V2X communication device. A data transmission method of a V2X communication device according to an embodiment of the present invention comprises the steps of: acquiring CBR values for a plurality of channels; configuring a CBR threshold value on the basis of the CBR values; assigning at least one channel candidate group to channels having CBR values that are equal to or smaller than the CBR threshold value; and selecting a transmission channel, through which service data is to be transmitted, from the at least one channel candidate group.