The architectural patterns perfected in 4G EPC laid the groundwork for the 5G Core (5GC). While EPC separated control and user planes physically, 5G goes a step further by using to virtualize software entirely.
Understanding call flows is crucial for troubleshooting and optimizing EPC networks. A. Initial Attach Procedure The architectural patterns perfected in 4G EPC laid
When a device powers down or loses network access, it gracefully disconnects to free up core network resources. The UE sends a Detach Request to the MME. A remote server sends data packets to the P-GW
A remote server sends data packets to the P-GW. The P-GW forwards the packets to the S-GW. This means that everything—voice
Handles UE authentication and key management in coordination with the HSS. 2. Serving Gateway (S-GW)
The Evolved Packet Core (EPC) is the backbone of the 4G LTE network. Unlike previous generations (2G/3G) which had separate domains for voice (Circuit Switched) and data (Packet Switched), LTE is an . This means that everything—voice, video, and data—is treated as packet data.