Unlicensed Spectrum Channel Access Priority Segmentation
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Solution Overview
Problem
In the sidelink-unlicensed (SL-U) system, the same channel access priority class is used for different physical channels, leading to inefficient use of unlicensed spectrum due to the same channel access parameters being applied across channels.
Innovation Solution
A processing method that allows terminal devices to access channels with preset channel access priority classes based on specific conditions, such as differences in physical channels, services, receivers, transmitters, and channel priorities, ensuring that each channel uses appropriate access parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the same channel access priority class is used for different physical channels, then the system operation is simplified, but the unlicensed spectrum utilization deteriorates
Solution Approach 1:
The patent segments the channel access mechanism by introducing different channel access priority classes (1-4) for different physical channels. Each priority class has distinct channel access parameters including defer duration, contention window sizes, and maximum channel occupancy times. This segmentation allows PSCCH, PSSCH, PSFCH, and S-SS/PSBCH to use differentiated access parameters, resolving the contradiction between operational simplicity and spectrum utilization efficiency.
Solution Approach 2:
The patent applies local quality by assigning specific channel access parameters tailored to each physical channel's characteristics. For example, PSCCH uses priority class 1 with shorter defer duration for control signaling, while PSSCH uses priority classes 2-4 based on service requirements. This localized parameter assignment optimizes each channel's access behavior for its specific function, improving overall spectrum utilization while maintaining manageable complexity through standardized parameter sets.
2Productivity
If different channel access parameters are used for different physical channels, then the unlicensed spectrum utilization is improved, but the system complexity increases
Solution Approach 1:
The patent manages complexity through parameter changes by defining four standardized priority classes with specific parameter sets. Each class specifies defer duration (e.g., 7μs for class 1, 15μs for class 4), contention window ranges (e.g., {3,7} for class 1, {15,31,63} for class 4), and maximum channel occupancy times. This parameterization approach allows differentiated access without requiring complex adaptive algorithms, as devices simply select parameters based on the assigned priority class for each channel type.
Data Source
AI summary
Disclosed are a processing method, a communication device and a storage medium. The processing method includes: in response to satisfying a preset condition, accessing a channel with a preset channel access priority class. Through the above method, different physical channels can use different channel access priority classes, thereby improving the utilization of the unlicensed spectrum.