Section: 4.18.2.2 PFD management based on PFD Determination analytics
Content: Figure 4.18.2.2-1 shows the procedure that NEF (PFDF) determines the PFD information for the known Application Identifier(s), based on the PFD Determination analytics information notified/responded from the subscribed/requested NWDAF. The procedure enables the NEF (PFDF) to determine whether to create/update/delete PFD information corresponding to the known Application Identifier(s). Figure 4.18.2.2-1: Procedure for PFD management based on PFD Determination analytics 1. The NWDAF notifies/responds to PFD Determination analytics to the NEF (PFDF) as Consumer NF with PFD Information defined in clause 6.16.3 of TS 23.288[ Architecture enhancements for 5G System (5GS) to support network data analytics services ]  [50]. 2. The NEF (PFDF) fetches the PFD information currently in use from UDR if not available in NEF (PFDF) as described from step 2 to step 3 of clause 4.18.3.1. 3. The NEF (PFDF) compares the PFD information from UDR with PFD information from the NWDAF to determine whether to create/update/delete PFD information corresponding to the Application Identifier. 4. If the NEF (PFDF) has determined in step 3 to create/update/delete PFD information corresponding to the Application Identifier, the NEF (PFDF) invokes the Nudr_DM_Create/Update/Delete (Application Identifier, one or more sets of PFDs) to the UDR to create/update/delete PFD information corresponding to the Application Identifier, i.e. from step 3 to step 5 of clause 4.18.2.1 are executed. The NEF (PFDF) may forward new/updated PFD information to UPF via SMF to detect a known application, as defined in clause 6.1.2.3.1 of TS 23.503[ Policy and charging control framework for the 5G System (5GS); Stage 2 ]  [20].