R1-2410103
discussion
On specification for AI/ML-based CSI prediction
From OPPO
Summary
OPPO proposes solutions for ensuring consistency between training and inference phases in AI/ML-based CSI prediction for NR air interface, addressing both intra-cell and inter-cell scenarios. The document contains 5 proposals and 3 observations focusing on associated ID frameworks and signaling mechanisms.
Position
OPPO advocates FOR adopting the associated ID framework from BM-Case 2 to solve consistency issues in AI/ML CSI prediction, supporting flexible model-to-ID relationships where one model can work with multiple associated IDs. They push FOR further standardization work on inter-cell consistency challenges, particularly when cells have different network-side conditions from different vendors, and advocate AGAINST requiring associated IDs for network-side training scenarios.
Key proposals
- Proposal 1 (Consistency Discussion): Suggest to use the associated ID framework in BM-Case 2 to address the intra-cell consistency issue of training and inference for UE-side CSI prediction
- Proposal 2 (Consistency Discussion): Regarding the CSI-RS configuration consistency between training and inference, two ways can be considered: explicit downlink signaling on CSI-RS configuration or implicit indication by associated ID
- Proposal 3 (Consistency Discussion): Regarding the associated ID framework, NW can configure associated ID(s) to UE through CSI-RS resources along with associated ID(s) or dataset along with associated ID(s)
- Proposal 4 (Consistency Discussion): UE can be configured to determine and report the combination of associated ID(s) to NW
- Proposal 5 (Inter-cell consistency): RAN1 to further study how to resolve the inter-cell consistency concern when different cells have different NW-side additional conditions
- Observation 1 (Consistency Discussion): Regarding the NW-side training for UE-sided CSI prediction model, associated ID is not required
- Observation 2 (Consistency Discussion): One model can be related to one or multiple associated ID(s)
- Observation 3 (Inter-cell consistency): Inter-cell consistency can be guaranteed when different cells have consistent NW-side additional conditions with the same mapping relationship between associated IDs