1 Introduction

This document provides information about how to configure the services and managed objects (MO) 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 Protocol Data Unit (PDU) establishment procedure.

Network Slice Selection Function supports the following functionalities:
  • 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.
The NSSF supports the above functions through following services:
  • 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.

Caution:

Apply configuration changes at NSSF only when it is healthy, that is, when all services (NSSF, Gateways, and cnDBTier) are up and running.

For more information about the NSSF supported services, see Oracle Communications Cloud Native Core, Network Slice Selection Function User Guide.

1.2 Audience

This guide is intended for the WebLogic admin or ops-web team who are responsible for installing the banking products of Oracle Financial Services Software Limited. For more information on the audience, refer to the table below:

Table 1-1 User Roles - Description

Role Description

Implementation Team

Implementation of

Presales Team

Install for demo purpose

Bank Personnel

Who installs

The users of this guide are expected to have a basic understanding of the following application servers:

  • Oracle Weblogic

  • IBM Websphere

  • Oracle Database

1.3 References

See the following documents for more information about NSSF:
  • Oracle Communications Cloud Native Core, Network Slice Selection Function User Guide
  • Oracle Communications Cloud Native Core, Network Slice Selection Function Installation, Upgrade, and Fault Recovery Guide