1 Introduction

This guide describes how to install or upgrade Oracle Communications Cloud Native Core, Network Slice Selection Function (NSSF) in a cloud native environment. It also includes information on performing fault recovery for NSSF.

Note:

  • This guide covers the installation instructions when Podman is the container platform with Helm as the Packaging Manager. For any other container platform, the operator must use the commands based on to their deployed container runtime environment.
  • kubectl commands can vary based on the platform deployment. Replace kubectl with Kubernetes environment-specific command line tool to configure Kubernetes resources through kube-api server. The instructions provided in this document are as per the CNE version of kube-api server.

Caution:

User, computer and applications, and character encoding settings may cause an issue when copy-pasting commands or any content from PDF. PDF reader version also affects the copy-pasting functionality. It is recommended to verify the pasted content especially when the hyphens or any special characters are part of the copied content.

1.1 Overview

NSSF is a key component of the 5G Service Based Architecture (SBA). NSSF selects the Network Slicing Instance (NSI). NSSF also 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 Network Repository Function (NRF), NSI ID, and target AMFs as part of UE initial registration and Packet Data Unit (PDU) establishment procedure.

NSSF's interaction with NRF allows to retrieve specific Network Function (NF) services to be used for the registration request. It also provides a mechanism for registration and subsequent notification.

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.

NSSF supports these functionalities through the following services:

  • Nnssf_NSSelection Service
  • Nnssf_NSSAIAvailability Service

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

1.2 References

Refer to the following documents while deploying NSSF:

  • Oracle Communications Cloud Native Core, Network Slice Selection Function User Guide
  • Oracle Communications Cloud Native Core, Network Slice Selection Function Network Impact Report
  • Oracle Communications Cloud Native Core, Network Slice Selection Function REST Specification Guide
  • Oracle Communications Cloud Native Core, Network Slice Selection Function Troubleshooting Guide
  • Oracle Communications Cloud Native Core, Cloud Native Environment Installation, Upgrade, and Fault Recovery Guide
  • Oracle Communications Cloud Native Core, Automated Testing Suite Guide
  • Oracle Communications Cloud Native Core, Data Collector User Guide
  • Oracle Communications Cloud Native Configuration Console User Guide
  • Oracle Communications Cloud Native Core, cnDBTier User Guide
  • Oracle Communications Cloud Native Core, cnDBTier Installation, Upgrade, and Fault Recovery Guide