NF (e.g. GMLC,NEF) may subscribe to UDM notifications of UE LCS privacy profile updates.
NF can decide to subscribe to such notifications while a deferred location request is on-going.
If the UE has generated or updated the UE Location Privacy Indication, the UE sends the Location Privacy Indication to the AMF via UE Location Privacy Setting Request in N1 NAS message. The UE Location Privacy Indication indicates whether allows or disallows the subsequent LCS requests for the UE, as defined in the chapter 5.4.
The AMF invokes a Nudm_ParameterProvision_Update (LCS privacy) service operation towards the UDM and the service operation carries the Location Privacy Indication information. The UDM stores or updates the UE LCS privacy profile in the UDR by invoking a Nudr_DM_Update (SUPI, Subscription Data) service operation accordingly.
The AMF responses to the UE via UE Location Privacy Setting Response in N1 NAS message.
UDM notifies the subscribed Network Function (e.g. GMLC, NEF) of the updated UE LCS privacy profile via Nudm_SDM_Notification Notify message.
NF (e.g. GMLC, NEF) may unsubscribe to UDM notifications of UE LCS privacy profile updates e.g. if a deferred location procedure is cancelled.
The procedure is defined by using the procedure in clause 184.108.40.206 of TS 23.502
to set the Location Privacy Indication parameters and should in addition unsubscribe to UDM notifications of UE LCS privacy profile updates e.g. if a deferred location procedure is cancelled.