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5G Core Network consists of key functions/nodes -
AMF – Access & Mobility Management Function - Plays key roles of NAS Signaling, Registration, Access Authentication, Mobility management control
UDM – Unified Data Management Function - Contains User subscription data and Authentication credentials
AUSF – Authentication Server Function - used to Authenticate devices
SMF – Session Management Function - used for Signaling related to user data
PCF – Policy Control Function - used for Record Billing, Policy rules for NW slicing, roaming & mobility management, Traffic steering at UPF, Manage PDU session, UE IP allocation
UPF – User Plane Function - plays key roles of Packet routing & fwd., Mobility anchor, QoS handling
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