4g Lte Evolved Packet Core Epc Concepts And Call Flows !link! Download Hot Jun 2026

[ P-GW ] [ S-GW ] [ MME ] [ eNodeB ] [ UE ] | | | | | |--- Downlink Data ------->| | | | | (Packet arrives) |--- Downlink Data Notif ->| | | | | |--- Paging ------------>| | | | | |--- Paging Request -->| | | |<-- Service Request ----| | |<-- Modify Bearer Req ----|<-- Service Request ------| | | |--- Modify Bearer Resp -->| |--- Initial Context ---->| | | | | Setup Request |--- Radio Resource -->| | | | | Control (RRC) | | |<-- Modify Bearer Req ----|<-- Context Setup Resp -| | | |--- Modify Bearer Resp -->| | | | | | | | |================== High-Speed Data GTP Tunnel ===========================>|

A central database containing user profiles, subscription data, and authentication keys used by the MME to verify users. [ P-GW ] [ S-GW ] [ MME

UE reports signal strength to the source eNodeB. It authenticates users, tracks their location, and selects

The primary control node. It authenticates users, tracks their location, and selects the gateways they will use. It authenticates users