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Content for  TS 23.273  Word version:  18.5.0

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6.12 UE Location Privacy Setting Procedure  6.12.1 UE Location Privacy Setting Procedure Initiated by UE  6.12.2 UE Location Privacy Setting Procedure Initiated by AF 
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6.12  UE Location Privacy Setting Procedure  p. 103

6.12.1  UE Location Privacy Setting Procedure Initiated by UE  p. 103

Reproduction of 3GPP TS 23.273, Fig. 6.12.1-1: UE Location Privacy Setting procedure initiated by UE
Figure 6.12.1-1: UE Location Privacy Setting procedure initiated by UE
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Step 0.
NF (e.g. GMLC, NEF) may subscribe to UDM notifications of UE LCS privacy profile updates.
Step 1.
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 clause 5.4. If the UE has generated or updated the event report expected area and optionally the area usage indication, e.g. based on UE power status, the UE Location Privacy Setting Request includes the event report expected area and the area usage indication.
Step 2.
The AMF invokes a Nudm_ParameterProvision_Update (LCS privacy) service operation towards the UDM and the service operation carries the Location Privacy Indication information and may include event report expected area and the area usage indication. 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.
Step 3.
The AMF responses to the UE via UE Location Privacy Setting Response in N1 NAS message.
Step 4.
UDM notifies the subscribed Network Function (e.g. GMLC, NEF) of the updated UE LCS privacy profile via Nudm_SDM_Notification Notify message.
Step 5.
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.
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6.12.2  UE Location Privacy Setting Procedure Initiated by AF  p. 103

The procedure is defined by using the procedure in clause 4.15.6.2 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.

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