ZTE · 5

ZTE, representing RAN1, responds to RAN2's inquiry regarding UE-based positioning Case 1 capabilities. They assert that the specific capabilities defined in items 58-2-9 and 58-2-10, which relate to the number of activated PRS processing windows and DL PRS buffering capabilities outside the Measurement Gap, must be known to both the gNB and the Location Management Function (LMF). This stance ensures that network-side entities have the necessary visibility into UE processing constraints for positioning procedures.

ZTE proposes that Feature Groups 27-23 and 58-2-11, which define support for more than one activated PRS processing window across all active DL BWPs, must be known to both the gNB and the LMF. This stance is driven by the NRPPa Measurement Preconfiguration and Activation procedures, where the LMF requests the gNB to configure and activate PPWs; without LMF knowledge of these capabilities, configuration failures may occur if requests exceed UE limits. Furthermore, ZTE proposes that Feature Groups 58-2-9 and 58-2-10, concerning DL PRS measurement outside Measurement Gaps and buffering capabilities for UE-based positioning Case 1, should also be known to both the gNB and the LMF. This ensures consistency with Rel-17 legacy positioning, where similar capabilities are already shared between nodes to facilitate proper PPW configuration and resource reservation.

ZTE opposes Option 1 for UE-side model inference applicability, arguing it causes substantial waste of air interface resources and complicates NW scheduling. They support Option 3, emphasizing its compatibility with legacy CSI-ReportConfig design. ZTE proposes that AI/ML beam management feature groups be defined at least per sub-use case level (BM-Case1, BM-Case2), with condition combinations aligned between NW and UE outside UE capability indication to support future extensions. They argue that the provision of associated ID in Step 3 should be optional and that inference configuration in Step 3 is unnecessary for determining applicability. ZTE requires that Step 4 reporting include condition combinations and model availability, while Step 5 inference configuration comprises associated CSI report configurations. Finally, they propose that functionality activation depends on CSI report temporal characteristics and that L1/L2 signaling for activation/deactivation should reuse existing CSI report mechanisms.