LTE System Engineering

With LTE now the cornerstone of global 4G services, this course provides an end to end view of a typical LTE deployment. As such, the architecture required for LTE, including the air interface and all of the key interfaces and protocols, is examined. The course then takes a “day in the life” approach to the LTE handset, detailing all of the typical activity an LTE handset undertakes as it interacts with the network; procedures such as Initial Attach, Bearer Establishment, Mobility and 5G Interworking are all considered. In conclusion, the course focuses on voice services, with emphasis on both CSFB and VoLTE.

Intermediate |
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Module 1 - Defining LTE

Topic areas covered include:

  • LTE Roadmap and Drivers:
    • 3GPP Roadmap.
    • LTE Advanced and LTE Advanced Pro.
    • LTE Releases and Versions.
  • 4G Mobile Data:
    • Growth of Mobile Data.
    • LTE Drivers.
    • 4G Fixed Wireless Access.
    • Private LTE Networks.
    • LTE Market Update.
Module 2 - LTE Architecture

Topic areas covered include:

  • The LTE System:
    • Evolved Packet System.
    • Mobile Equipment.
    • Subscriber Identity Module.
    • SIM and Device Identities.
  • LTE RAN:
    • 4G Radio Access.
    • Evolved Node B.
    • eNB Protocol Stacks.
  • Evolved Packet Core Network:
    • Evolved Packet Core.
    • Control and User Plane Separation.
    • Evolved Packet Core Protocols.
  • Evolving RAN Architectures:
    • 5G Non Standalone.
    • NSA Reference Point and Protocols.
    • 4G in the NG-RAN.
    • ng-eNB Protocols.
Module 3 - LTE Air Interface

Topic areas covered include:

  • LTE Radio Spectrum:
    • LTE Radio Bands.
    • LTE Carrier.
    • FDD vs TDD.
    • LTE Channel Number.
    • Spectrum Refarming.
  • Multiple Access:
    • Orthogonal Frequency Division Multiple Access.
    • Subcarriers and Reference Signals.
    • LTE Frame Structure.
    • Multiple Access.
  • Enhancing LTE Performance:
    • Modulation and Coding.
    • MIMO Technology.
    • Carrier Aggregation.
    • Shared Spectrum Options.
Module 4 - LTE Initial Procedures

Topic areas covered include:

  • LTE Identities:
    • Device and User Identities.
    • E-UTRAN Identities.
    • EPC Identities.
  • Tracking Areas:
    • Tracking Areas Identity.
    • MME Pool, S-GW Service and Tracking Areas.
  • Signalling in LTE:
    • Stratums.
    • EPS Mobility Management.
  • EPS Session Management:
    • Default EPS Bearers.
    • Radio Resource Control.
  • Initial Attach:
    • PLMN and Network Selection.
    • Cell Selection.
    • Attach Procedure.
    • Combined Attach.
  • Attaching without PDN:
    • 4G Attach without PDN Connectivity.
  • Activity: Signalling analysis of an Initial Attach using Mpirical’s NetX.
Module 5 - LTE Security

Topic areas covered include:

  • Security in 4G Networks:
    • Authentication and Key Agreement.
    • Security in 4G Networks.
    • 4G Authentication and Key Agreement.
  • 4G Security Procedures:
    • 4G Mutual Authentication.
    • 4G NAS Key Distribution.
    • 4G RRC Key Distribution.
  • 4G Encryption and Integrity Protection:
    • 4G Algorithms.
    • 4G Encryption.
    • 4G Integrity Protection.
  • Securing the E-UTRAN:
    • Transport Security.
    • IPSec Management.
Module 6 - Defining EPS Bearers

Topic areas covered include:

  • 4G Sessions:
    • PDN Connection.
    • IP Address Allocation.
  • 4G Quality of Service:
    • Default and Dedicated EPS Bearers.
    • EPS Bearer QoS Attributes Overview.
  • QoS Characteristics – Part 1:
    • QoS Class Identifier.
    • Allocation and Retention Priority.
  • QoS Characteristics – Part 2:
    • Aggregate Maximum Bit Rates.
    • Traffic Flow Templates.
    • GTP Tunnels and Tunnel Endpoint Identifiers.
  • 4G PDN Connectivity Establishment:
    • End-to-End Tunnels.
    • 4G Attach and Default EPS Bearer Establishment.
    • LTE Tunnel Creation.
  • Dedicated EPS Bearer Establishment:
    • 4G Dedicated EPS Bearer Establishment Procedure.
    • End to End Tunnels.
  • Activity: Signalling analysis of EPS bearer related procedures using Mpirical’s NetX.
Module 7 - Utilizing EPS Bearers

Topic areas covered include:

  • EPS Bearers in Idle State:
    • Idle and Connected States.
    • EPS Bearers in ECM Idle.
    • S1 Release.
  • 4G Uplink Data Transfer:
    • Uplink Data Transfer when Idle.
    • Uplink Data Transfer when Connected.
  • 4G Downlink Data Transfer:
    • Downlink Data Transfer when Idle.
    • Downlink Data Transfer when Connected.
  • Cellular IoT Enhancements:
    • Non IP Data Delivery.
    • Control Plane Cellular IoT EPS Optimization.
    • Uplink and Downlink Data Transfer via SCEF.
  • Activity: Signalling analysis of EPS bearer utilization related procedures using Mpirical’s NetX.
Module 8 - LTE Mobility

Topic areas covered include:

  • Mobility in 4G:
    • LTE Mobility.
    • Mobility with the EPC.
  • Idle Mode Mobility:
    • Cell Reselection.
  • Tracking Area Update:
    • Tracking Areas.
    • 4G Tracking Area Update.
  • 4G Handovers:
    • X2 Handover.
    • S1 Handover.
  • LTE Roaming:
    • Home Routed and Local Breakout.
    • GRX and IPX.
  • Activity: Signalling analysis of mobility related procedures using Mpirical’s NetX.
Module 9 - 3GPP and Non-3GPP Interworking

Topic areas covered include:

  • Interworking with 2G / 3G Networks:
    • Inter RAT Mobility.
    • 4G / 3G / 2G Interworking Architecture.
    • 4G to 3G Packet Switched Handover.
    • 4G to 2G Packet Switched Handover.
  • 4G and 5G Non Standalone:
    • 5G Non Standalone Architecture.
    • Splitting Bearers.
    • Option 3x.
    • NSA Considerations.
  • 5G NSA Secondary Node Procedures:
    • Secondary Node Addition.
    • Change of Secondary Node.
    • Release of Secondary Node.
  • Interworking with Non-3GPP Networks:
    • Non-3GPP Network Architecture.
    • ePDG Selection.
    • Non-3GPP Initial Attach
Module 10 - LTE and Voice Services

Topic areas covered include:

  • Introducing Circuit Switched Fallback:
    • LTE Voice Options.
    • CSFB Network Requirements.
    • CSFB Options.
  • CSFB Procedures:
    • CSFB Initial Procedures.
    • CSFB Mobile Originated Call Setup.
    • CSFB Mobile Terminated Call Setup.
    • CSFB and Text Messaging.
  • Introducing VoLTE:
    • VoLTE Key Components.
    • IMS Architecture.
    • IMS Identities.
    • VoLTE Initial Procedures:
    • VoLTE Support.
    • VoLTE Registration.
    • Post Registration.
  • VoLTE Call Procedures:
    • VoLTE Media – Codecs.
    • SIP Signalling Exchange.
    • Establishing Dedicated EPS Bearers.
    • End to End Call Example.
    • Single Radio – Voice Call Continuity.
    • Wi-Fi Calling.
    • Activity: Signalling analysis of CSFB and VoLTE procedures.