Feature Description

The primary functionality of the SMF is to manage the flow-based QoS model. SMF interacts with the Unified Data Management (UDM) and Policy Control Function (PCF) to get the subscribed and authorized QoS parameters for GBR and non-GBR flows and passes on the relevant information to UE (NAS), gNB (NGAP), and UPF (PFCP) so that all nodes on the network provide the desired QoS to the PDU session.