TCL · 10.5.3.1

TCL proposes studying template-based CSI measurement and reporting configurations to replace RRC semi-static configuration with predefined standardized templates that enable batch parameter adjustment and state transition signaling, targeting reduced RRC reconfiguration delay and air interface signaling overhead. For CSI-RS design, TCL supports up to 256 antenna ports in the first 6G release with two options for study: single CSI-RS resource carrying all ports or multi-resource aggregation, and requires prioritizing larger CDM groups (e.g., CDM16) with single-PRB occupancy as the baseline design approach. TCL proposes eliminating periodic CSI-RS resource configurations entirely in 6GR, supporting only semi-persistent and aperiodic behaviors, with semi-persistent configurations refined to achieve periodic-equivalent functionality for UE energy savings. For codebook design, TCL selects Rel-19 Type-I or Rel-16 eType-II as baseline codebooks and requires an unified codebook structure across all antenna ports to avoid Rel-15's bifurcated design for different port counts, while also proposing a downloadable method where gNB transmits partial or full precoding matrix information to reduce UE-side CSI calculation complexity and reporting overhead. TCL proposes studying UE-initiated and event-triggered CSI reporting for all CSI quantities, adaptive CSI reporting including dynamic adaptation of reporting periodicity and overhead, early CSI acquisition for inter-cell mobility/terminal state switching/carrier state switching, frequency/spatial domain CSI prediction using low-overhead CSI-RS patterns (uniform, non-uniform, cyclic), and CSI compression with JSCC/JSCM including evaluation of CRC-free versus CRC-attached HARQ mechanisms.