PUCCH Capability Reporting for Multi-Numerology Cell Grouping
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Solution Overview
Problem
Current PUCCH group related capabilities in NR-CA and NR-DC are inadequate, failing to allow UEs to support more than two numerologies in a single PUCCH group, report supported PUCCH group configurations, and indicate PUCCH locations across different bands.
Innovation Solution
Introduce new feature groups (FGs) for NR-CA, allowing UEs to report PUCCH grouping and location capabilities with enhanced support for up to three or four different subcarrier spacings (SCS) and specify carrier types, including FR1 licensed TDD, FR1 unlicensed TDD, FR1 FDD, and FR2.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If current PUCCH group capability reporting is used, then the system maintains simplicity in capability reporting, but it cannot support single PUCCH groups with more than 2 numerologies or indicate which bands can be configured in the same group
Solution Approach 1:
The capability reporting is segmented into multiple independent bitmaps: PUCCH-GroupingCapabilityBitmap indicating which bands can be configured in the same PUCCH group, PUCCH-LocationCapabilityBitmap indicating which bands can transmit PUCCH, and PUCCH-NumerologiesSupportedBitmap indicating supported numerologies. This segmentation allows flexible configuration while maintaining clear, structured reporting.
Solution Approach 2:
The patent changes the reporting parameters from a simple capability indicator to multiple bitmap fields that can represent different band combinations, numerologies, and PUCCH group configurations. This allows the system to adapt to various NR-CA and NR-DC scenarios with different band configurations and numerology requirements.
2Adaptability or versatility
If the system supports multiple band configurations for PUCCH groups, then network capabilities are enhanced, but the capability reporting mechanism becomes more complex
Solution Approach 1:
Each bitmap field serves a specific local function: PUCCH-GroupingCapabilityBitmap specifically indicates band grouping capability, PUCCH-LocationCapabilityBitmap specifically indicates PUCCH transmission location capability, and PUCCH-NumerologiesSupportedBitmap specifically indicates numerology support. This localized quality ensures that each part of the reporting mechanism provides clear, unambiguous information about a specific capability aspect.
3Reliability
If PUCCH capability reporting includes SDL and SUL band information, then support for NR-CA and NR-DC is improved, but the reporting overhead increases
Solution Approach 1:
The bitmap-based reporting mechanism is designed to be universal and multi-functional. The same PUCCH-GroupingCapabilityBitmap and PUCCH-LocationCapabilityBitmap can represent different band combinations including SDL and SUL bands, as well as traditional bands. This universal structure supports NR-CA, NR-DC, and various band configurations without requiring separate reporting mechanisms, thereby minimizing overhead while maximizing reliability.
Data Source
AI summary
Apparatuses, systems, and methods for providing an enhancement for PUCCH and Cell Grouping Capability for NR-CA and NR-DC. A wireless device may transmit, to a base station, a Physical Uplink Control Channel (PUCCH) capability report comprising at least one of PUCCH grouping capability information and a PUCCH location capability information.