NR Sidelink PSFCH Interlace Allocation in Unlicensed Bands
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing sidelink communication resources, particularly in unlicensed bands, to meet the increasing demands for enhanced mobile broadband, massive Machine Type Communication (MTC), and Ultra-Reliable and Low Latency Communication (URLLC) services, especially in vehicle-to-everything (V2X) scenarios.
Innovation Solution
The proposed solution involves determining and utilizing physical sidelink feedback channel (PSFCH) resources for transmitting PSFCH related to physical sidelink shared channels (PSSCH), which include dedicated and common interlaces, with each PRB subset comprising K3 PRBs, to optimize resource allocation and enhance communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PSFCH resources are allocated in unlicensed bands using existing methods, then resource allocation can be performed, but resource utilization efficiency is low and communication reliability is insufficient
Solution Approach 1:
The patent segments the unlicensed band spectrum into multiple interlaces (first interlace, second interlace, third interlace) with different occupied channel bandwidths (OCBs). Each interlace contains specific physical resource blocks (PRBs) that can be independently allocated for PSFCH resources. This segmentation allows the system to select appropriate interlaces based on channel conditions and service requirements, improving both resource utilization efficiency and communication reliability by avoiding interference and optimizing spectrum usage.
2Adaptability or versatility
If dedicated PRBs are used for PSFCH resources, then resource allocation flexibility is improved, but device complexity increases
Solution Approach 1:
The patent assigns different dedicated physical resource blocks (PRBs) to different interlaces based on their specific characteristics. The first interlace uses dedicated PRBs in the first interlace, the second interlace uses dedicated PRBs in the second interlace, and so on. Each interlace has locally optimized resource allocation tailored to its occupied channel bandwidth and service requirements. This local quality approach provides resource allocation flexibility for different service types while managing device complexity through standardized allocation patterns within each interlace.
Data Source
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AI summary
Proposed is an operation method of a first device (100) in a wireless communication system. The method may comprise the steps of: determining a PSFCH resource for transmitting at least one PSFCH associated with at least one PSSCH, wherein the PSFCH resource includes a common interlace and at least one dedicated PRB included in a first interlace, the at least one PSSCH is mapped to one or more PRB subsets, and the one or more PRB subsets each include K3 number of PRBs included in the at least one dedicated PRB; and, on the basis of the PSFCH resource, carrying out transmission of the at least one PSFCH.