Anchor Point for Intra-RAT and Inter-RAT Mobility

The UPF is the anchor point between the mobile infrastructure and the Data Network (DN). That is, the encapsulation and decapsulation of GPRS Tunneling Protocol for the User Plane (GTP-U). Intra-RAT mobility like Xn handover and inter-RAT mobility like 4G to 5G and 5G to 4G handover are supported for this use case.

The GTP-U Support feature is related to this use case.