Sidelink Resource Selection for Interleaved RB Guard Bands
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Solution Overview
Problem
In sidelink unlicensed (SL-U) communication, traditional resource selection methods fail to account for guard bands between RB sets, leading to unavailable resources and reduced communication efficiency, especially in interleaved RB transmission scenarios.
Innovation Solution
A method and device for determining sidelink resources that exclude or include specific types of subchannels based on system configuration, excluding resources that occupy consecutively indexed subchannels in guard bands and adding nonconsecutively indexed subchannels to ensure availability and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional resource selection methods are used that only consider consecutive subchannels, then resource selection is simple, but available resources are missed and communication efficiency is reduced
Solution Approach 1:
The patent segments the resource pool into different types of subchannels (consecutive and non-consecutive) and processes them separately. The method divides candidate resources into first candidate resources (consecutive subchannels) and second candidate resources (non-consecutive subchannels), allowing the system to explore more resource options without overwhelming complexity by handling each segment systematically
Solution Approach 2:
The patent extends the resource selection from the traditional single dimension of consecutive subchannels to multiple dimensions by incorporating non-consecutive subchannel configurations. This dimensional expansion allows the system to access resources that were previously unavailable, thereby improving communication efficiency while maintaining manageable complexity through structured processing
2Quantity of substance
If resources in guard bands are used without proper conditions, then more transmission resources are available, but transmission fails due to protocol violations
Solution Approach 1:
The patent performs preliminary actions by determining the types of subchannels occupied by candidate resources before final selection. It checks whether candidate resources occupy consecutive subchannels (first type) or non-consecutive subchannels (second type) and applies different handling procedures accordingly. This preliminary classification ensures that guard band resources are only used when protocol conditions are met, preventing transmission failures
Solution Approach 2:
The patent changes the selection parameters for different resource types. For first candidate resources (consecutive subchannels), it applies traditional selection criteria. For second candidate resources (non-consecutive subchannels), it applies modified criteria that account for guard band positioning. This parameter differentiation allows safe utilization of guard band resources while maintaining transmission reliability
3Productivity
If only consecutive subchannels are considered for resource selection, then resource pool structure is simple, but resource utilization is insufficient in interleaved RB transmission
Solution Approach 1:
The patent introduces dynamic resource selection capabilities that adapt to different transmission modes (consecutive RB vs. interleaved RB). The system can dynamically switch between considering only consecutive subchannels and also considering non-consecutive subchannels based on the resource pool configuration and transmission requirements, thereby improving utilization without permanently increasing structural complexity
Data Source
AI summary
A sidelink resource determination method is applied to a first node and includes determining a physical-layer candidate time and frequency resource set for sidelink transmission occasions from a sidelink resource pool according to system configuration information; and determining physical-layer time and frequency resources for sidelink transmission occasions from the physical-layer candidate time and frequency resource set. The physical-layer candidate time and frequency resource set does not include first resources occupying L consecutively indexed sub-channels in the frequency domain, or includes second resources occupying L sub-channels in the frequency domain, or does not include first resources occupying L consecutively indexed sub-channels in the frequency domain and includes second resources occupying L sub-channels in the frequency domain, where at least one pair of adjacent sub-channels for the second resources are nonconsecutively indexed, and L denotes an integer greater than or equal to 1.