The primary function of the S-GW is routing and forwarding user data packets. it acts as the mobility anchor for the user plane during handovers between eNodeBs.
: The exit point to external networks like the Internet. It handles IP address allocation, Quality of Service (QoS) enforcement, and deep packet inspection.
Acts as an "anchor" for user data as devices move between different cell towers (eNodeBs), ensuring the connection doesn't drop. The primary function of the S-GW is routing
: The MME contacts the HSS over the S6a interface to fetch authentication vectors. The MME and UE then mutually authenticate each other and activate NAS (Non-Access Stratum) security encryption.
Here are some of the key call flows in the EPC: It handles IP address allocation, Quality of Service
The EPC architecture consists of several key network elements that work together to provide connectivity. A. Mobility Management Entity (MME)
The MME sends a Detach Accept message back to the UE (if the UE is still reachable). Finally, the MME instructs the eNodeB to release the S1 control-plane and RRC radio connections, returning the UE to an idle, unregistered state. Next Steps for Advanced Learning The MME and UE then mutually authenticate each
To protect user privacy, the network avoids sending the permanent identity (IMSI) over the airwaves whenever possible. Instead, the MME generates a temporary ID called the . The UE uses the GUTI for subsequent connections to avoid being tracked by third parties.