Question: How is the Aerial UE subscription information provided to the NG-RAN node during Registration, Mobility Registration Update, and Service Request procedures?
Option 1: Via the S1AP INITIAL CONTEXT SETUP REQUEST message from the MME.
Option 2: Via the NGAP UE Context Modification procedure initiated by the AMF.
Option 3: Via the XnAP HANDOVER REQUEST message sent by the source NG-RAN node during Xn-based handover.
Option 4: Via the NGAP INITIAL CONTEXT SETUP REQUEST message from the AMF.
Explanation: The Aerial UE subscription information is stored in the user's subscription information in UDM and transferred to the AMF. The AMF then provides this information to the NG-RAN node via the NGAP INITIAL CONTEXT SETUP REQUEST message during Registration, Mobility Registration Update, and Service Request procedures.