Analyzing the 5G Core

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Building on the foundation of 5G System Engineering, this course provides a detailed examination of the 5G Core Network. Key emphasis is placed on the Service Based network architecture, as well as the main network procedures that occur during a mobile’s typical interactivity with the 5G network. Analysis of the 5G Registration, PDU Session establishment, PDU Session usage, Policy Control , MEC, 4G Interworking and network slicing will be provided as part of this process.

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5G Service Based Architecture

Topic areas covered include:

  • Positioning the 5G System:
    • The 5G System.
    • Centralized – Radio Access Network.
    • C-RAN Impact on the 5G Core.
  • 5G Core Network:
    • AMF.
    • SMF.
    • UPF.
    • AUSF.
    • PCF.
    • NEF.
    • UDM.
  • Supplementary 5G Core Network Functions:
    • UDSF.
    • NWDAF.
    • NSSF.
    • NRF.
    • CHF.
    • SCP.
    • SMSF.
  • 5G Service Based Architecture:
    • SBA Model.
    • SBI Interaction.
    • Virtualization and Cloud Native.
  • 5G Service Based Interfaces:
    • SBI Protocol Stack.
    • HTTP/2.
    • Standardization of 5G SBI APIs.
  • 5GC Protocols:
    • 5GC Protocols Overview.
    • GTPv2-C.
    • GTPv1-U.
    • 5G NAS.
    • NGAP.
    • PFCP.
5G Registration Analysis

Topic areas covered include:

  • Network Function Registration:
    • Service Registration.
    • Profile Updates and Heartbeat Mechanism.
    • Service Discovery.
    • NF Deregistration.
    • Status Subscription.
  • Device Registration – Part 1:
    • Overview.
    • AMF Selection.
    • NAS Registration Request.
    • Interaction with Old AMF.
    • NAS Identification Request / Response.
  • Device Registration – Part 2:
    • Overview.
    • Security Phase.
    • Registration Status Update.
    • Registering the Subscriber.
  • Device Registration – Part 3:
    • Overview.
    • Subscriber Data Acquisition.
    • Subscriber Data Subscription.
  • Device Registration – Part 4:
    • Overview.
    • AM Policy Association Establishment.
    • PDU Session Reactivation.
    • NAS Registration Accept.
    • NAS Registration Complete.
    • Initial Registration and Security.
5G Security Analysis

Topic areas covered include:

  • Supporting Security in 5G:
    • 5G Security Overview.
    • Standards bodies.
  • 5G Cryptographic Processes:
    • 5G Security Algorithms.
    • Authentication and Key Agreement.
    • AV Generation.
  • 5G AKA:
    • Mutual Authentication.
    • High Level 5G AKA Procedure.
    • Generation of 5G-SE-AV.
    • Device Authentication.
    • Authentication Confirmation.
  • Key Derivation and Usage:
    • Encryption and Integrity Checking.
    • Key Derivation Process.
  • Protecting Service Based Interfaces – HTTPS:
    • TLS Overview.
    • TLS Operation.
    • Certificate Exchange.
    • TLS Cipher Suites.
  • Protecting the 5G SBA - OAuth 2.0:
    • OAuth 2.0 Basic Concept.
    • Access Token Acquisition.
    • Access Token Utilization.
  • Roaming Security:
    • Security Edge Protection Proxy.
    • PRINS.
    • IPUPS.
    • Steering of Roaming Protection.
PDU Session Establishment Analysis

Topic areas covered include:

  • PDU Sessions:
    • PDU Session Connectivity.
    • QoS Model for 5G.
    • QoS Rules and Packet Detection Rules.
    • QoS Flow Parameters.
  • Application Triggering:
    • Scenario.
    • Procedure.
  • PDU Session Establishment Procedure (Part 1):
    • Overview.
    • NAS PDU Session Establishment Request.
    • AMF to SMF – Create SM Context Request.
    • SM Related Subscriber Data Acquisition.
  • PDU Session Establishment Procedure (Part 2):
    • Overview.
    • SMF to AMF – Session Establishment Response.
    • PDU Session Authentication and Authorization.
    • PDU-CAN Session Establishment.
    • PFCP Session Establishment.
  • PDU Session Establishment Procedure (Part 3):
    • Overview.
    • PDU Session Establishment Accept.
    • NGAP Initial Context Setup Request.
    • RRC Reconfiguration.
  • PDU Session Establishment (Part 4):
    • Overview.
    • NGAP Initial Context Setup Response.
    • Finalizing the PDU Session.
Utilizing PDU Sessions

Topic areas covered include:

  • QoS Flow Establishment (Session Modification):
    • Scenario.
    • Procedure.
  • Utilizing PDU Sessions – Service Request:
    • Scenario.
    • Procedure.
  • Utilizing PDU Sessions – Paging:
    • Scenario.
    • Procedure.
  • Releasing the Access Network Resources:
    • Scenario.
    • Procedure.
5G Policy and Charging Control

Topic areas covered include:

  • 5G PCC Fundamentals:
    • High Level Concepts.
    • Monetizing Services Using Policy Control.
    • Service Data Flows.
  • PCC Architecture:
    • High Level Architecture.
    • Policy Control Function.
    • Binding Support Function.
    • Network Analytics Related Policy Decisions.
  • Access and Mobility Related Policy Control:
    • Overview.
    • AM Policy Association Establishment.
    • AM Policy Control Request Triggers.
  • UE Related Policy Control:
    • Overview.
    • UE Policy Session Creation.
    • UE Policy Delivery Service.
    • Focus on ANDSP and URSP.
  • Session Management Policy Control:
    • SM Policy Association Establishment.
    • SM Related Policy.
  • PCC Binding Mechanism:
    • Overview.
    • Session Binding.
    • PCC and QoS Rule Authorization.
    • QoS Flow Binding.
  • 5G Charging Concepts:
    • 5G Charging Architecture (Service Based).
    • Nchf API.
    • Converged Charging Example.
MEC Concepts and Architecture

Topic areas covered include:

  • MEC Deployment:
    • Overview.
    • MEC Application Functions.
    • MEC Example Scenario.
  • MEC Key Concepts:
    • Connectivity Models.
    • Local Access to the Data Network.
    • Standardization of MEC.
  • ETSI MEC Framework and Architecture:
    • ETSI MEC Framework.
    • ETSI MEC Reference Architecture.
    • 5G and ETSI MEC Integration.
  • ETSI MEC Procedural Aspects:
    • Application Package On-Boarding.
    • Application Instantiation.
  • 3GPP Edge Computing Architecture:
    • MEC and 3GPP High Level Architecture.
    • Integration with the 5G Core.
  • 3GPP Edge Computing – Initial Procedures:
    • ECS Discovery.
    • Service Provisioning.
    • Registration.
    • EAS Discovery.
  • 3GPP Edge Computing – Operational Aspects:
    • EAS Instantiation.
    • Application Context Relocation.
MEC and 5G Enablers

Topic areas covered include:

  • 5G Enablers for MEC – Local Networks:
    • AF Influenced Traffic Routing.
    • Traffic Steering Control.
    • Local Area Data Networks.
  • 5G Enablers for MEC – UL CLs and BPs:
    • Uplink Classifiers.
    • 5G Uplink Classifier Addition Procedure.
    • IPv6 Multi-homing (Branching Points).
  • 5G Enablers for MEC – SSC Modes:
    • SSC Overview.
    • SSC Mode 1.
    • SSC Mode 2.
    • SSC Mode 3.
    • UEs and MEC Application Mobility.
5G and 4G Interworking

Topic areas covered include:

  • Interworking with LTE:
    • Interworking Key Concepts.
    • Single and Dual Registration Mode.
  • Single and Dual Registration Mode Mobility:
    • 5GC to EPC Mobility (Dual Registration Mode).
    • EPC to 5GC Mobility (Dual Registration Mode).
    • Mobility with Single Registration Mode Supported.
  • Architectural Considerations:
    • Architecture for 5G and 4G Interworking.
    • N26 Reference Point.
  • Idle Mode Mobility Procedures (with N26):
    • 5GC to EPC Mobility (Single Registration, Idle Mode).
    • EPC to 5GC Mobility (Single Registration, Idle Mode).
    • 4G GUTI to 5G-GUTI Mapping.
  • 5GS to EPS Handover (N26 Supported):
    • Scenario.
    • Procedure.
  • EPS to 5GS Handover (N26 Supported):
    • Scenario.
    • Procedure.
  • Fallback Mechanisms:
    • EPS and RAT Fallback.
    • High Level Fallback Procedure.
    • Emergency Services Fallback.
5G Network Slicing

Topic areas covered include:

  • Network Slicing Concepts:
    • Driving Factors for Network Slicing.
    • What is a Network Slice?
    • High Level Slice Orchestration.
    • Standardization.
  • Network Slice Template:
    • Customer Engagement.
    • Alternative Approaches.
    • Example NEST - eMBB with IMS Support.
    • Example NEST- Commercial Flight Telematics.
    • Example NEST - Industry 4.0 and HMTC.
  • Network Slicing Architectural Considerations:
    • High Level Architecture.
    • Network Slice Selection Function.
    • Network Slice Admission Control Function.
    • Slice Analytics.
  • Defining a Network Slice:
    • Communication Services.
    • Network Slices, NSI and NSSI.
    • NSSAI (Network Slice Selection Assistance Information).
  • Network Slice Orchestration:
    • NSI Lifecycle Management.
    • Slice Instantiation.
    • NSSI Allocation.
  • Utilizing Network Slicing:
    • 5G Registration.
    • PDU Session Establishment.
  • Slice Security:
    • Slice Security Options.
    • Slice Authentication and Authorization.