NR-U CORESET Configuration for PDCCH Monitoring With Varying RB Sets
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Solution Overview
Problem
In New Radio Unlicensed Spectrum (NR-U), the misalignment of CORESET resource allocation with varying RB set sizes leads to inefficient use of bandwidth and potential loss of information due to punctured PDCCH candidates, which are not fully confined within a single RB set.
Innovation Solution
The method involves determining a CORESET configuration, search space set configuration, and RB set configuration to identify partially confined resources, and adjusting the PDCCH-monitoring protocol through rate-matching, ignoring, or modifying the resource allocation to ensure full confinement within RB sets, thereby improving performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If CORESET resource allocation is configured based on a standard RB set size, then the PDCCH monitoring protocol can operate with simplified resource mapping, but misalignment occurs with varying RB set sizes in NR-U leading to partial confinement issues
Solution Approach 1:
The patent applies dynamics by making the CORESET resource allocation adaptive to varying RB set sizes. The method determines CORESET resources based on the actual size of the first RB set rather than using a fixed standard configuration. This allows the PDCCH monitoring protocol to dynamically adjust to different channel bandwidth parts and RB set configurations in NR-U, resolving the misalignment issue while maintaining operational simplicity.
2Adaptability or versatility
If CORESET resources are allocated to cover the entire frequency range, then comprehensive coverage is achieved, but resources are wasted in unallocated RB sets leading to inefficient bandwidth utilization
Solution Approach 1:
The patent applies local quality by configuring CORESET resources specifically for the first RB set based on its actual size and characteristics. Instead of uniformly allocating resources across the entire frequency range, the method tailors the CORESET configuration to match the specific RB set configuration, ensuring resources are efficiently utilized only where needed and avoiding waste in unallocated regions.
3Productivity
If PDCCH candidates are transmitted across multiple RB sets, then wider bandwidth utilization is achieved, but punctured candidates occur when RB sets have different sizes leading to information loss
Solution Approach 1:
The patent applies segmentation by dividing the frequency domain into distinct RB sets with potentially different sizes, and configuring PDCCH candidates to be confined within individual RB sets rather than spanning across them. This segmentation approach allows each PDCCH candidate to be independently managed within its specific RB set, preventing puncturing issues that arise when candidates straddle RB set boundaries of different sizes.
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AI summary
Provided is a method of network communication for addressing a misalignment of a CORESET resource allocation with a first RB set due to varying RB set size, the method including determining a CORESET configuration, a search space set configuration, and/or an RB set configuration, determining the search space set configuration includes multiple frequency domain monitoring occasions, identifying a CORESET resource in each of the frequency domain monitoring occasions, determining the CORESET resource is only partially confined within the first RB set, and adjusting a PDCCH-monitoring protocol to improve performance of the CORESET resource.