4GKernnetz
The 4G-Kernnetz, also known as the Evolved Packet Core (EPC), is the core network of the LTE mobile communications standard. It provides packet-switched data services, supports voice over LTE (VoLTE) via IP Multimedia Subsystem (IMS), and handles mobility, session management, and policy control for the radio access network.
The EPC comprises several functional nodes, notably the Mobility Management Entity (MME), Serving Gateway (S-GW), and
Key interfaces connect these components: S1-MME and S1-U between the eNodeB and EPC, S5/S8 between S-GW and
Functions include mobility management, session management, IP address allocation, and policy-based charging. The EPC provides a
In evolution terms, the EPC is the 4G core and is gradually complemented or replaced by 5G