Maak je eigen telpatroon op ruitjesMaak je eigen telpatroon op ruitjes
S1-MME (Control Plane), S1-U (User Plane), S5/S8 (Core Engine Interconnect)
The P-GW assigns an IP address, generates charging keys, creates the Default Bearer, and returns a Create Session Response via the S-GW to the MME.
The EPC consists of several key network elements, each with a specific role in managing your mobile connection:
The Evolved Packet Core (EPC) is a key component of the 4G LTE (Long-Term Evolution) network architecture. It provides a high-speed, all-IP network for delivering mobile broadband services. The EPC is responsible for managing user sessions, routing data packets, and providing connectivity to the internet and other IP networks. S1-MME (Control Plane), S1-U (User Plane), S5/S8 (Core
UE eNodeB MME S-GW P-GW | | | | | |---Detach Req---->| | | | | |---Detach Req----->| | | | | |---Delete Sess--->| | | | | |---Delete Sess---->| | | | |<--Delete Resp-----| | | |<--Delete Resp----| | |<--Detach Accept--| | | | |<==Signaling Connection Release======>| | | Step 1: Detach Request
UE detects a new tracking area, periodic TAU timer expires, or UE returns to coverage.
The MME selects an S-GW and P-GW. It sends a Create Session Request to the S-GW, which passes it to the P-GW to allocate an IP address. The EPC is responsible for managing user sessions,
You walk from living room to backyard, watching YouTube → Tower hands you off to another tower → No buffering → EPC tracks your location via MME & SGW.
Every service, including voice (VoLTE), is delivered over IP. Separation of Planes: It splits the Control Plane (signaling) from the User Plane (actual data), allowing each to scale independently. Always-On Connectivity:
The brain of the control plane. It handles tracking, paging, authentication, and resource allocation for the User Equipment (UE). It sends a Create Session Request to the
Established for specific services needing higher QoS, such as VoLTE. 5. Download Resources: LTE/EPC Call Flows (Hot Topics)
The Evolved Packet Core is the backbone of modern high-speed mobile data services. Its flat architecture and separation of control and user planes ensure efficiency and low latency. Understanding the core concepts and call flows—such as Attach, Service Request, and Handover—is indispensable for anyone working with 4G LTE technology.
Enables native support for Voice over LTE (VoLTE) and high-speed data services. 2. Fundamental EPC Network Components
