6.3.25 AF Discovery and Selection

23.5013GPPRelease 18System architecture for the 5G System (5GS)TS

The NF consumers (e.g. NWDAF) may utilize the NRF to discover AF instance(s) in the MNO domain, i.e. trusted AF(s), unless AF information is available by other means, e.g. locally configured in NF consumers. The NRF provides NF profile(s) of AF instance(s) to the NF consumers.

The following factors may be considered for AF discovery and selection:

– One or multiple combination(s) of the S-NSSAI and DNN corresponding to an AF.

– Supported Application Id(s).

– Event ID(s) Supported by an AF.

– Internal-Group Identifier.

The NF consumer (e.g. NWDAF) may select an AF instance, in the MNO domain, considering one or multiple combination(s) of the S-NSSAI and DNN corresponding to an AF and the EventID(s) supported by an AF to provide the input data required for generation of analytics. The NF consumer (e.g. NWDAF) may consider the supported Application Id(s), if the input data is required only for those applications. The NF consumer (e.g. NWDAF) may consider the Internal-Group Identifier supported by the AF if the input data is required for a particular group of UEs.