Architecture & Signaling - Mohamed ELadawi

Architecture & Signaling

LTE Attach Procedure | E2E Call Flow, MME, EPS Bearer & Default Bearer | 4G E2E Signaling Session 5

Session 5 of my 4G/LTE E2E Signaling series is out: the LTE Attach Procedure. Attach is the first thing a phone does on an LTE network. It registers, gets authenticated, receives an IP address and sets up the Default EPS Bearer. In this session: → Attach Functions & Triggering Conditions

Cell Selection & Reselection

4G LTE Cell Selection Explained: Initial Selection, Stored Information and Cell Selection Criteria

Introduction After the UE completes system information acquisition, the next step is to determine whether the detected cell is suitable for camping. This process is called cell selection. During cell selection, the UE checks the available LTE cells and evaluates whether a cell satisfies the required coverage, quality, and access

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LTE RRC States Explained | ECM, EMM & 4G to 5G Transitions | 4G E2E Signaling Session 4 (Video)

In this Session 4 of the 4G End-to-End Signaling Course, we break down LTE RRC states, RRC Idle vs RRC Connected, LTE to 5G state transitions, and the role of ECM and EMM states in the EPC/core network. You will learn how the UE is viewed from

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LTE Network Architecture Deep Dive | RAN, EPC, Interfaces & Cloud EPC | 4G E2E Signaling Session 3 (Video)

Welcome back to the 4G End-to-End Signaling Free Course – Session 3. In this session, we build the foundation for understanding LTE signaling by explaining the 4G LTE architecture, the role of each major EPC node, and how different network elements communicate with each other. You will learn the

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LTE RACH/RRC Call Flow & PRACH Parameter Details, RA-RNTI, SIB2 | 4G E2E Signaling Session 2 (Video)

Welcome to Session 2 of the 4G End-to-End Course. In this video, we break down the LTE Random Access Procedure (RACH) step by step and explain how the UE moves from downlink synchronization to uplink synchronization before starting the connection setup process. This session covers the complete RACH

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LTE Foundation, PLMN, MIB/SIB1, Cell Selection & Reselection | 4G E2E Signaling Session 1 (Video)

Hi All, Session 1 of the 4G E2E Signaling Course is now available on YouTube. In this session, we build the essential LTE foundation concepts needed before going into detailed end-to-end signaling procedures such as attach, bearer setup, handover, and service request. This video explains how the UE

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VoLTE IMS High level Architecture and E2E Call Flow

In this video we’ll take a quick look at how VoLTE and IMS work together. First, we’ll go over the high-level architecture of VoLTE and IMS, showing the main network components involved in delivering voice over LTE. Then, we’ll briefly explain the end-to-end call