16.14.10 Verification of UE location

The core network may trigger a network verification procedure for a UE in RRC_CONNECTED to verify it is consistent with the network-based assessed location. It is up to network implementation how to handle UEs which does not support the location verification.

For UE location verification based on multi-RTT with single satellite in NTN, at least the following UE and gNB measurements specified in TS 38.215 [59] are reported: gNB receive-transmit time difference at the uplink time synchronization reference point, UE receive-transmit time difference, UE receive-transmit time difference subframe offset and DL timing drift.

The assistance information provided to the CN may include ephemeris information including accurate satellite position and velocity at the time of multi-RTT measurement, and common TA parameters (ta-Common, ta-CommonDrift, ta-CommonDriftVariant), and Epoch time.