3GPP 23.501 v20.2.0 — the document's own text
5.35A.6 Providing cell ID/TAC of MBSR for services
Taught in 26. Relays, satellites, femtos and shared networks (The 5G system architecture, in depth).
The TAC and cell ID broadcasted by the MBSR cell(s) are configured and reconfigured e.g. upon mobility as specified in TS 38.401 [42].
After the MBSR is authorized as defined in 5.35A.4, when a UE is served by a cell of this MBSR, the IAB-donor-CU may provide 'Additional ULI' in addition to User Location Information, in N2 messages. The 'Additional ULI' is the ULI of the IAB-UE. The AMF may consider the 'Additional ULI' when it determines UE location and manages the UE location related functions (e.g. Mobility Restrictions).
When the AMF provides user location information to other NFs (e.g. LMF as specified in clause 5.9 of TS 23.273 [87]) for a UE connected via MBSR, the AMF may also send the Additional ULI received via N2 messages.