Dynamic Threshold Resource Selection for NR V2X Sidelink
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Solution Overview
Problem
In wireless communication systems, particularly in NR sidelink and V2X communications, there is a need for efficient resource occupation methods to manage increasing traffic and aperiodic/variable traffic patterns, as existing sensing-based resource selection methods are ineffective in predicting resource allocation, leading to increased collision probabilities and performance degradation.
Innovation Solution
A method involving a dynamic threshold-based resource selection approach, where user equipment (UE) measures channel conditions to determine a dynamic CCA threshold, reflecting past channel information, to select resources efficiently and minimize collisions, and an apparatus supporting this method, including processors and transceivers to control resource selection and transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sensing-based resource selection methods are used, then resource allocation can be predicted, but collision probability increases and performance degrades due to ineffective prediction in aperiodic/variable traffic patterns
Solution Approach 1:
The patent applies dynamics by transitioning from static sensing-based resource selection to dynamic threshold-based resource selection. The CCA threshold is dynamically adjusted based on channel conditions and traffic characteristics, allowing the system to adapt to aperiodic and variable traffic patterns in NR V2X communications. This dynamic approach enables more accurate resource allocation predictions while reducing collisions, thereby improving both reliability and communication performance simultaneously.
2Productivity
If existing resource selection methods are used, then resource occupation can be managed, but collision probability increases with increasing traffic and aperiodic/variable traffic patterns
Solution Approach 1:
The patent applies parameter changes by modifying the CCA threshold parameter based on channel conditions and traffic characteristics. Instead of using fixed threshold values, the system dynamically adjusts the threshold to match the current traffic pattern and channel state. This parameter adaptation enables more efficient resource occupation while simultaneously reducing collision probability, resolving the contradiction between productivity and reliability in NR V2X communications.
3Productivity
If dynamic threshold-based resource selection is implemented, then resource occupation efficiency improves, but device complexity increases due to additional measurement and determination operations
Solution Approach 1:
The patent applies self-service by enabling the UE to autonomously perform channel measurements and dynamic threshold adjustments without requiring complex network control or external assistance. The device itself gathers channel information, determines appropriate thresholds, and selects resources based on its own assessments. This self-service approach improves resource occupation efficiency while keeping device complexity manageable, as the additional operations are performed independently by each UE using standardized measurement procedures.
Data Source
AI summary
Provided are a method for transmitting sidelink information by means of a first device (100) and a device for supporting same in a wireless communication system. The method may comprise the steps of: determining a plurality of candidate resources on the basis of a threshold; selecting, from the plurality of candidate resources and in a specific time interval, a resource for transmitting sidelink information; and transmitting the sidelink information on the resource.