NEC · 9.1.3

NEC proposes reusing the associated ID from BM-Case 1/2 to ensure consistency of NW-side additional conditions for CSI prediction, while simultaneously arguing that performance monitoring serves as a fundamental LCM procedure to guarantee inference performance regardless of consistency mechanisms. They require support for UE-initiated data collection requests and the provision of preferred observation and prediction window periods to the NW. NEC proposes configuring distinct observation and prediction windows for P/SP CSI reports to reduce signaling overhead and suggests autonomous updates to CSI reporting periodicity based on significant points of variation. Regarding performance monitoring, NEC focuses specification efforts on Type 1 and Type 3 monitoring, proposing intermediate KPIs like SGCS and NMSE, and defines specific fallback criteria based on threshold violations for current and candidate models. They further require the UE to report changes in model input/output parameters, such as window lengths, to the NW during model switching or updates.

NEC advocates for reusing existing associated ID mechanisms from beam management cases for training-inference consistency, emphasizing UE-side performance monitoring (Type 1 and 3) over network-side monitoring to minimize overhead while maintaining control. They push for NW-controlled AI/ML-based CSI reporting to preserve legacy principles and support discontinuous CSI-RS reception mechanisms, positioning against pure UE-autonomous reporting that could lead to uncontrolled behavior across different UE implementations.