D.1 Determination of UE presence in Area of Interest by AMF

23.5023GPPProcedures for the 5G System (5GS)Release 18TS

If the AMF has requested NG-RAN location reporting as specified in clause 4.10 for the Area Of Interest and UE is in CM-CONNECTED state, including RRC_CONNECTED and RRC_INACTIVE state, the AMF determines the UE presence in the Area of Interest as the reported value from the NG-RAN, as specified in clause D.2.

If the AMF has requested N2 Notification as specified in clause 4.8.3, the AMF determines the UE presence in Area Of Interest as follows, taking N2 Notification from NG-RAN into consideration:

– IN:

– if the UE is in CM-CONNECTED with RRC_CONNECTED state and if the last received User Location Information for the UE is inside the Area Of Interest service area; or

NOTE 1: The above is valid e.g. under the condition that Area Of Interest border coincides with NG-RAN node service area border(s).

– if the UE is in CM-CONNECTED and if the UE is inside a Registration Area which is completely contained within the Area Of Interest.

– OUT:

– if the UE is in CM-CONNECTED with RRC_CONNECTED state and if the last received User Location Information for the UE is outside the Area Of Interest; or

NOTE 2: The above is valid e.g. under the condition that Area Of Interest border coincides with NG-RAN node service area border(s).

– if the UE is in CM-CONNECTED and if UE is inside a Registration Area which does not contain any part of Area Of Interest.

– UNKNOWN:

if none of above conditions for IN or OUT is met.

Otherwise, AMF determines the UE presence of Area Of Interest as follows:

– IN:

– if the UE is inside the Area Of Interest service area and if the UE is in CM-CONNECTED state; or

– if the UE is inside a Registration Area which is contained within the Area Of Interest.

– OUT:

– if the UE is outside the Area Of Interest in CM-CONNECTED; or

– if UE is inside a Registration Area which does not contain any part of Area Of Interest.

– UNKNOWN:

if none of above conditions for IN or OUT is met.