NSSF Supported Services

This section includes information about the service supported by NSSF.

NSSF supports the Network Slice Selection service.

The Network Slice Selection service is identified by the service operation name Nnssf_NSSelection.This service supports GET request during the following procedures by UE:

• Initial Register: When the NSSF is able to find authorized network slice information for the requested network slice selection information, the response body includes a payload body containing at least the Allowed NSSAI, target AMF Set or the list of candidate AMF(s).
• PDU Session Establishment:This service is utilized by the NF service consumer (e.g AMF) to update the S-NSSAI(s) supported on a per TA basis on the NSSF. It also allows a mechanism for AMF to subscribe and notify on any update of supported/restricted S-NSSAI(s) per TA/PLMN of the UE.