Section: 5.2.13.2.4 Nbsf_Management_Discovery service operation
Content: Service Operation name: Nbsf_Management discovery Description: Discovers the PCF and PCF set selected for a PDU Session identified by the tuple (UE address(es), SUPI, GPSI, DNN, S-NSSAI), or discovers the PCF and PCF set selected for the UE identified by the tuple (SUPI, GPSI). This operation may also be used to determine the SUPI from the tuple (UE address, DNN, S-NSSAI). Inputs, Required: UE address (i.e. IP address or MAC address), [Required, for a PDU Session and for a UE], DNN [Conditional], S-NSSAI [Conditional], if the target PCF is for a PDU Session, MBS session ID as defined in TS 23.247[ Architectural enhancements for 5G multicast-broadcast services ]  [78], [Required, for an MBS Session]. SUPI and/or GPSI, if the target PCF is for a UE. NOTE: For support of time sensitive communication and time synchronization (as described in clause 5.28.3.2 of TS 23.501[ System architecture for the 5G System (5GS) ]  [2]) the UE address contains the DS-TT port MAC address for Ethernet type PDU Session. Inputs, Optional: If the target PCF is for a PDU Session, SUPI, GPSI. Outputs, Required: PCF address(es), PCF instance ID [Conditional, if available] and PCF Set ID [Conditional, if available], level of Binding [Conditional, if available] (see clause 6.3.1.0 of TS 23.501[ System architecture for the 5G System (5GS) ]  [2]). Outputs, Optional: SUPI, if available.