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5g

5G Core Deregistration and SM Context Release Explained: UDM and SMF Interactions

Explore the 5G UE Deregistration and Session Management (SM) context release procedure. Learn how AMF, UDM, and SMF interact via Nudm and Nsmf interfaces to maintain 5G network efficiency.

Understanding 5G UDM Registration and Subscriber Data Management Process

This post explains how the AMF in 5G Core communicates with the UDM to register and obtain subscription data. Learn how Nudm interfaces handle subscriber authentication, mobility data, and SMF selection.

5G NAS Security Mode Command and Equipment Identity Check Explained Step-by-Step

Learn how 5G establishes secure signaling with NAS Security Mode Command and verifies device legitimacy using Equipment Identity Check in 5G Core.

5G NAS Authentication and Security Procedure Explained: Step-by-Step Message Flow

Understand the 5G NAS Authentication and Security procedure — how the UE, AMF, and AUSF establish trust using SUCI, SUPI, and authentication vectors.

5G AMF Interactions Explained: Step-by-Step 5G Standalone Access Registration Flow

Explore how 5G AMF handles Standalone Access Registration through NGAP and Namf Communication messages for UE context transfer in the 5G Core.

5G RRC Reconfiguration and Data Transfer Explained: Step-by-Step 5G Call Flow

Explore the 5G RRC Reconfiguration and Data Transfer procedure — from context setup to uplink/downlink data flow between UE, gNB, and 5G Core.

5G-NR AS Security Procedure Explained: From Initial Context Setup to Security Mode Complete

Understand the 5G-NR AS Security Procedure, including Initial Context Setup, Security Mode Command, and Security Mode Complete, ensuring secure UE–gNB communication.

Understanding 5G NAS Authentication and Security Procedures: Step-by-Step Message Flow Explained

Explore how 5G NAS Authentication and Security procedures work between UE, gNB, and the 5G Core (AMF, UPF). Learn the step-by-step message flow ensuring secure 5G connectivity.

5G NR RRC Setup and NAS Registration Request Explained: UE to gNB Signaling Flow

Understand how 5G NR RRC Setup and NAS Registration Request messages work between the UE and gNB during standalone access registration.

5G NR Standalone Access Registration: Understanding gNB Interactions and RRC Connection Setup

Explore the 5G Standalone Access Registration process, from Msg1 Preamble to SRB1 setup, and understand gNB interactions during the RRC Connection Setup phase.