R1-2603378
CR
Correction on AI/ML for beam management in TS38212
From Samsung
Summary
This document contains a single Change Request (CR-0246) submitted by Samsung, NEC, and LG to correct a specification gap in TS 38.212 regarding AI/ML beam management. The proposal addresses the issue where P/SP CSI reporting on PUCCH for performance monitoring may result in an RS-PAI payload of 1 or 2 bits, which is unsupported by current NR specifications for PUCCH formats other than HARQ-ACK/SR.
Position
Samsung, NEC, and LG propose a correction to TS 38.212 to resolve an unsupported payload size issue for AI/ML beam management. They identify that for P/SP CSI reporting on PUCCH for performance monitoring, the RS-PAI information bit count may fall below 3 bits. Since NR specifications do not support PUCCH carrying 1 or 2 information bits for CSI (excluding HARQ-ACK/SR), they require that the number of information bits of the related CSI be zero-padded to 3 bits. This ensures compatibility with existing PUCCH format constraints while enabling the transmission of AI/ML-related CSI reports.
Key proposals
- Proposal 1 (Sec 6.3.1.1.2): For P/SP CSI reporting on PUCCH for performance monitoring, the number of information bits of related CSI (specifically RS-PAI) shall be zero-padded to 3 bits if the payload is less than 3 bits.