Sidelink Resource Selection Patterns for Unlicensed NR Channels
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Solution Overview
Problem
There is a need to improve Sidelink (SL) communication procedures on unlicensed spectrum in 5G/New Radio (NR) environments, particularly in selecting resources for SL transmissions to prevent data rate reductions, delay increases, or jitter without impacting user experience.
Innovation Solution
A user equipment (UE) device performs SL transmissions by selecting resources in accordance with configuration parameters that include S-SSB transmission timing and frequency structures, ensuring compliance with Occupied Channel Bandwidth/Power Spectral Density requirements, and coordinating with neighboring terminals using multiple radio access technologies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If resources are selected from unlicensed spectrum for SL transmission, then spectrum utilization is improved, but interference with other systems and compliance complexity increase
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting transmission parameters such as power spectral density, occupied channel bandwidth, and resource selection patterns to comply with regulatory requirements while utilizing unlicensed spectrum. The network configures these parameters through RRC signaling to adapt to different unlicensed band requirements.
Solution Approach 2:
The patent segments the SL transmission resources into specific sub-channels and resource pools that are configured to meet OCB/PSD requirements. By dividing the unlicensed spectrum into controlled resource segments with specific transmission parameters, the system achieves compliance while maintaining utilization efficiency.
2Productivity
If resource selection pattern is configured for SL sub-channel, then transmission efficiency is improved, but resource selection complexity increases
Solution Approach 1:
The patent implements preliminary action by pre-configuring resource selection patterns through RRC signaling before actual SL transmissions occur. The network provides configuration parameters including resource pools, sub-channel allocations, and transmission patterns in advance, allowing UEs to efficiently select resources without complex real-time decision-making.
3Reliability
If PSFCH transmission meets OCB/PSD requirement, then regulatory compliance is improved, but data rate may be reduced
Solution Approach 1:
The patent resolves this contradiction by dynamically adjusting transmission parameters such as power spectral density limits, occupied channel bandwidth configurations, and resource allocation patterns. These parameter changes ensure OCB/PSD compliance while optimizing data rates through efficient resource utilization and adaptive modulation and coding schemes.
Data Source
AI summary
A terminal may include a receiver configured to receive configuration parameters for a sidelink (SL) transmission that includes resources selected from a portion of an unlicensed spectrum. The configuration parameters may indicate a resource selection pattern for an SL sub-channel in the SL transmission. The terminal may include a processor configured to perform a resource selection procedure that includes resources selected for the SL transmission in accordance with the resource selection pattern. The terminal may include a transmitter configured to transmit the SL transmission. The SL transmission may include a Physical Sidelink Feedback Channel (“PSFCH”) transmission that satisfies an Occupied Channel Bandwidth (“OCB”)/Power Spectral Density (“PSD”) requirement.