UE history information enhancements during mobility transfers

A method, performed by a source new radio 5th generation (NG) radio access network (RAN) (NG-RAN) central unit (NG-RAN CU) for a current cell, of signaling user equipment (UE) History Information to a target NG-RAN CU in a handover message, the method comprising:

• receiving from an NG-RAN distributed unit (DU) a new radio (NR) absolute radio frequency channel number (NR ARFCN) for reference point A in an F1 setup request or next generation nodeB (gNB) DU (gNB-DU) configuration update;
• determining that the UE History Information lacks a previous Last Visited NG-RAN Cell Information entry indicating a Network Type, an NR ARFCN for reference point A, and a Cell Type that match those of the current cell associated with the source NG-RAN CU;
• in response to determining that the UE History Information lacks the previous Last Visited NG-RAN Cell Information entry, adding to the UE History Information a new Last Visited NG-RAN Cell Information entry indicating for the current cell the Network Type, the NR ARFCN for reference point A, and the Cell Type;
• and
• sending the UE History Information to the target NG-RAN CU in the handover message;
• wherein:
• the source NG-RAN CU is included in a non-terrestrial network;
• and
• the Cell Type is one of non-terrestrial network (NTN) lower earth orbit (LEO) Cell, NTN medium earth orbit (MEO) Cell, NTN geostationary earth orbit (GEO) Cell, NTN high elliptical orbit (HEO) CELL, or NTN unmanned aerial system (UAS) Platform.