Figure C-1 shows the PNI-NPN architecture to support location services with optimisation of signalling latency and privacy, with the corresponding functional descriptions are defined in clause 5.13. When UE access the NG-RAN in the local network, during the registration procedure or service request procedure, NG-RAN selects the Serving AMF in the public network. With appropriate configuration, local AMF cannot be selected as the serving AMF for the UE. Assuming NG-RAN 1 is the serving RAN of UE. NG-RAN 2 and NG-RAN 3 illustrated in the figure below is for positioning signal measurement.