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5G Core Network with Simulations: Architecture, Cloud Integration, Call Flows, Security

5G Core Network with Simulations: Architecture, Cloud Integration, Call Flows, Security

6h 23mIntermediate2026-03-18

Authors

Rahul Kaundal

Rahul Kaundal

Itelcotech

Itelcotech

Course details

Modern mobile networks span decades of evolving standards, architecture shifts, and complex protocols—making hands-on expertise essential for engineers and architects working in telecom. In this course, join instructor Rahul Kaundal as he traces mobile network evolution from 2G to 5G, with a focus on 5G's cloud-native service-based architecture (SBA). Lab modules give the chance to explore key 5G Core functions—including AMF, SMF, UPF, NRF, and UDM—running in a network. Along the way, learn how to analyze live call flows and examine security protocols like HTTP/2 and mutual TLS. By the end of this course, you’ll also be prepared to leverage network slicing, container technologies like Docker and Kubernetes, and Voice over New Radio (VoNR).

Learning objectives
Trace the evolution of mobile networks from 2G to 5G, explain the role of global standards bodies, and define the key service pillars (eMBB, URLLC, and mMTC) that drive 5G design.
Analyze the architectural breakdown of 2G, 3G, 4G, and 5G networks, with a focus on the cloud-native service-based architecture (SBA) and the function of core network elements (AMF, SMF, UPF, and UDM).
Map critical 5G procedures including initial access, registration, PDU session establishment, and the end-to-end call flow, using lab simulations and protocol analysis tools.
Evaluate enabling technologies such as network slicing, cloud/NFV principles, containerization in Docker and Kubernetes, and 5G security frameworks (AKA and SUPI/SUCI).
Implement foundational knowledge of advanced 5G services, including Voice over New Radio (VoNR) call flows, IMS integration, and QoS management for guaranteed bit rate bearers.

Concepts

Introduction

  • Introduction

Evolution of Mobile Networks and 5G Fundamentals

  • Journey of mobile networks - From 2G to emerging 6G
  • Global telecom standards - 3GPP, ITU, and ETSI explained
  • Foundations of 5G technology
  • Exploring 5G service pillars - eMBB, URLLC, and mMTC

Telecom Network Architecture Overview

  • Big picture - High-level telecom network architecture
  • Radio access network (RAN) essentials
  • Transport network fundamentals
  • Core network - Concepts and components

Pre-5G Network Evolution

  • Understanding 2G (GSM GPRS) network architecture
  • Inside 3G (UMTS) network architecture
  • IMS - IP Multimedia Subsystem deep dive
  • 3GPP releases 6 8 - Evolution towards LTE
  • 4G LTE network architecture breakdown
  • Advancements in 4G - LTE-Advanced and 4.5G
  • Transition to 5G - Key enhancements from LTE to 5G

5G Network Architecture

  • Overview of 5G core (5GC) reference architecture
  • Service-based architecture (SBA) explained
  • Lab - Inside a 5G lab architecture
  • AMF overview - Access and Mobility Management Function
  • Lab - AMF instantiation in a real network
  • AMF organizational hierarchy and structure
  • SMF explained - Session Management Function
  • Lab - SMF instantiation in a real network
  • UPF overview - User Plane Function
  • Lab - UPF instantiation in a real network
  • PCF overview - Policy Control Function
  • Lab - PCF instantiation in a real network
  • UDM overview - Unified Data Management
  • Lab - UDM instantiation in a real network
  • NWDAF - Network Data Analytics Function explained
  • NSSF - Network Slice Selection Function
  • NRF - Network Repository Function
  • Lab - NRF instantiation and behavior
  • Understanding HTTP 2 protocol in 5G
  • OAuth 2.0 - Authentication framework overview
  • PKI and mutual TLS - Lab-based demonstration
  • Protocol stack of the 5G core network

5G Call Flows, Procedures, and Simulations

  • Initial access and registration in 5G networks
  • Live simulation - gNB registration with the 5G core
  • Step-by-step 5G call setup flow
  • Critical procedures during call setup
  • UE profile in UDM - Authentication parameters explained
  • RRC protocol - Key functions
  • RRC state model explained
  • UE state transition mechanics
  • Understanding RRC idle and connected modes
  • Breakdown of 5G registration messages
  • Context setup types in 5G
  • Initial context setup signaling flow
  • Establishing a PDU session in 5G
  • NG-AP and PDU session simulation
  • QoS architecture in 5G
  • Managing PDU sessions and QoS flows
  • QoS simulation - Default vs dedicated 5QI
  • DRBs - Understanding Data Radio Bearers

Network Slicing and Simulations

  • Fundamentals of network slicing in 5G
  • Understanding network slice identifiers (NSSAI)
  • Ensuring continuous services using slicing
  • Slice selection process during registration
  • AMF selection logic based on slicing
  • How RAN configures network slices
  • URSP - UE Route Selection Policy explained

Identities - Network and User

  • Overview of 5G network identities
  • Understanding IMSI - The classic user identity
  • GUTI explained - Temporary UE identity
  • SUPI and SUCI - 5G user identities and privacy

Cloud-Native Foundations for 5G

  • Introduction to cloud computing concepts
  • Key characteristics of cloud computing
  • Service models explained - IaaS, PaaS, and SaaS
  • How the 5G network leverages cloud infrastructure
  • Deployment models - Public, private, and hybrid cloud
  • Virtualization and containers - Underlying technologies
  • Docker basics - Containerizing applications
  • End-to-end container workflow - Build push deploy run monitor
  • Kubernetes essentials - Orchestrating containers
  • Kubernetes cluster architecture for 5G networks
  • Serverless API architecture explained

5G and Cloud Integration

  • Why 5G and cloud technologies are interdependent
  • NFV concepts - Transition from hardware to software
  • Implementing NFV in 5G networks

5G Security and Privacy

  • Security lifecycle of a 5G UE - SUCI, UDM UDR, and HSM TPM
  • Encryption and integrity - NIA NEA in 5G security
  • Securing roaming and interconnect - Role of SEPP
  • Certificate automation in 5G - CMPv2 and ACME

IMS and Voice over New Radio

  • 5G voice services using EN-DC
  • EPS fallback - Voice call handling
  • Voice over New Radio (VoNR) overview
  • IMS core architecture explained
  • VoNR registration procedure
  • VoNR call setup signaling flow
  • Handling emergency calls over 5G
  • QoS and GBR bearers required for VoNR
  • Understanding VoNR coverage challenges
  • Capacity planning considerations for VoNR

Conclusion

  • Conclusion

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