1 Introduction
This document includes information about NSSF installation in 5G environment.
Network Slice Selection Function (NSSF) selects the network slicing instance (NSI), determines the allowed network slice selection assistance information (NSSAI) and sets AMF to serve the User Equipment (UE). Access and Mobility Management Function (AMF) can retrieve NRF, NSI ID, and target AMFs as part of UE initial registration and Packet Data Unit (PDU) establishment procedure.
Oracle NSSF interaction with NRF allows retrieving specific NF services to be used for the registration request. It also allows mechanism for registration and subsequent notification Function Instance Discovery.
The NSSF supports the following services:
- Nnssf_NSSelection Service
- Nnssf_NSSAIAvailability Service
NSSF References
- Cloud Native Environment (OC-CNE) Installation Guide
- Network Slice Selection Function (NSSF) Cloud Native User's Guide
Acronyms and Terminologies
The following table provides information about the acronyms and terminologies used within the document:
Table 1-1 Acronyms and Terminologies
| Field | Description |
|---|---|
| AMF | Access and Mobility Management Function |
| Allowed NSSAI | NSSAI provided by the Serving PLMN during a registration procedure, indicating the S-NSSAIs values the UE could use in the Serving PLMN for the current registration area. |
| Configured NSSAI | NSSAI provisioned in the UE applicable to one or more PLMNs. |
| OHC | Oracle Help Center |
| OSDC | Oracle Software Delivery Cloud |
| NEF | Network Exposure Function |
| Network Slice | A logical network that provides specific network capabilities and network characteristics. |
| NF | Network Function |
| NF service | A functionality exposed by a NF through a service based interface and consumed by other authorized NFs. |
| NRF | Network Repository Function |
| NSI | Network Slice instance. A set of Network Function instances and the required resources (such as compute, storage and networking resources) which form a deployed Network Slice. |
| NSI ID | Network Slice Instance Identifier |
| NSSAI | Network Slice Selection Assistance Information |
| NSSF | Network Slice Selection Function |
| NSSP | Network Slice Selection Policy |
| PLMN | Public Land Mobile Network |
| Requested NSSAI | NSSAI provided by the UE to the Serving PLMN during registration. |
| SD | Slice Differentiator |
| SEPP | Security Edge Protection Proxy |
| S-NSSAI | Single Network Slice Selection Assistance Information |
| SST | Slice/Service type |