Samsung · 9.1.4.1
CSI compression ·
RAN1#119 · Source verification
Claude's delta
new
vs RAN1#118bis
Samsung newly participated with technical focus on compression domain selection and temporal CSI compression aspects.
AI-synthesized from contributions · all text is paraphrased
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Contributions at RAN1#119 · 1 doc
Views on additional study for AI/ML based CSI compression
Position extracted by Claude
Samsung proposes that angle-delay (W2) domain compression is significantly more robust to data distribution mismatches than spatial-frequency (W) domain compression, citing up to 37.9% degradation for W-domain versus only 0.7% for W2-domain when mixing deployment scenarios. They require the study of an 'associated ID' mechanism to align UE-side and network-side training datasets with respect to network-side additional conditions, such as deployment scenarios or network-part model versions, for both Direction A and Direction C inter-vendor collaboration. Samsung concludes that data distribution mismatch due to UE antenna spacing has negligible impact on performance, allowing independent UE-side model updates. They propose using a relative KPI (SGCS_AI / SGCS_Baseline) for network-side monitoring to specifically identify AI/ML-related performance losses. Additionally, they propose studying Joint Source-Channel Coding and Modulation (JSCCM) to mitigate the cliff effect and reduce complexity.
Summary
Samsung presents views on further studies for AI/ML-based CSI compression in Rel-19, focusing on temporal aspects (Case 2 and Case 3), performance-complexity trade-offs, and inter-vendor training collaboration. The document contains 18 proposals and 16 observations, arguing that angle-delay (W2) domain compression offers superior generalization and robustness against data distribution mismatches compared to spatial-frequency domain compression.
Prior contributions
Samsung has no prior contributions to 9.1.4.1 in the meetings currently tracked. This is either a new contributor to this sub-topic or the earliest meeting in our history.
How this was derived
Claude extracted the "position extracted" field above directly from each Tdoc during summarization.
For the delta summary at the top, Claude compared Samsung's consolidated stance at RAN1#119
against their stance at RAN1#118bis and classified the change as
new.
Always verify critical claims against the original Tdocs linked above.