1 Introduction
This document provides information about how to configure the services and manageable objects in Oracle Communications Cloud Native Core, Network Slice Selection Function (NSSF) using Representational State Transfer Application Program Interfaces (REST APIs).
1.1 Overview
Oracle Communications Network Slice Selection Function (NSSF) selects the network slicing instance (NSI), determines the allowed Network Slice Selection Assistance Information (NSSAI) and Access and Mobility Management Function (AMF) to serve the User Equipment (UE). AMF can retrieve NRF, NSI ID, and target AMFs as part of UE initial registration and Packet Data Unit (PDU) establishment procedure.
- NSSF enables the Access and Mobility Management Function (AMF) to perform initial registration and (Protocol Data Unit) PDU session establishment.
- AMF can retrieve NRF, NSI ID and target AMFs as part of UE initial registration and PDU establishment procedure.
- NSSF uses an NF Service Consumer (AMF) to update the S-NSSAI(s) the AMF supports and notify any change in status.
- NSSF selects the network slicing instance (NSI) and determines the authorized Network Slice Selection Assistance Information (NSSAIs) and AMF to serve the UE.
- NSSF interaction with NRF allows retrieving specific NF services to be used for the registration request.
- NSSF also allows a mechanism for registration and subsequent notification.
- Nnssf_NSSelection Service
- Nnssf_NSSAIAvailability Service
Note:
The performance and capacity of the NSSF system may vary based on the call model, Feature or Interface configuration, and underlying CNE and hardware environment.For more information about the NSSF supported services, see Oracle Communications Cloud Native Core, Network Slice Selection Function User Guide.