Is there specific Network functions & features required for 5G slicing support ?

First of all, network slicing provides a complete end-to-end virtual network for a given source. It is important to consider the features needed for Functions related to slices when designing and implementing these networks. Specifically, the features needed for Functions related to slices help determine performance and customization.

A Slice is a logical network based on Radio Access Network, Transport Network and Core Network, it is built as we decide to build it: per vertical, service, customer, technical characteristics, functional characteristics … When we talk about features needed for Functions related to slices, these decisions are central to the structure of the slice.

Regarding network functions required for 5G slicing support :

• Mandatory 5G Core network functions are AMF/SMF/UPF/AUSF/UDM/NRF. These are all features needed for Functions related to slices to meet service requirements effectively.
• The dedicated Network Slice Selection Function (NSSF) is used for slice selection, with operator policies, when several slices are used.

Regarding specific features for use cases requirements using a specific slice type:

• For the use case URLLC, some features in the RAN and Core could be activated.
• For IoT related use cases some features on the energy saving or specific communication for short message are used. As a result, features needed for Functions related to slices may vary based on specific application needs.