If you are involved in the troubleshooting of LTE networks, you will appreciate that having a good understanding of the protocols is critical. This course therefore sets out to provide a detailed explanation of the LTE protocols that can be found within the E-UTRA, E-UTRAN and EPC. Furthermore, to enhance the explanations, the course incorporates real use cases and examples through the use of Mpirical’s NetX virtual network analyzer.
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Section 1 - RRC

Topic areas covered include:

  • Introduction to RRC:
    • Air Interface Protocol Stack.
    • RRC States.
    • RRC Connection.
  • E-UTRA Radio Bearers:
    • Signalling Radio Bearer:
      • SRB.
    • Dedicated Radio Bearers:
      • DRB.
  • System Information:
    • SI Messages:
      • MIB, SIB1, System Information Types.
  • RRC Connection Reconfiguration.
  • LTE Mobility:
    • E-UTRA Measurements.
    • LTE Events.
    • Handover Process.
    • Inter-RAT Mobility.
Section 2 - X2AP

Topic areas covered include:

  • Introduction to X2AP.
  • Architecture of the X2 Application Part:
    • Functions of the X2 Application Protocol.
  • X2 Procedures:
    • X2 Basic Mobility Procedures - Handover Preparation.
    • SN Status Transfer.
    • UE Context Release.
    • 3Handover Cancel.
    • X2 Load Indication.
    • X2 Resource Status Reporting.
    • X2 Setup.
    • X2 eNB Configuration.
Section 3 - S1AP

Topic areas covered include:

  • Introduction to S1AP.
  • The E-UTRAN Control Plane:
    • E-UTRAN Protocol Specifications.
  • The E-UTRAN S1 Application Protocol.
  • S1 Functions and Procedures.
  • Example S1 Procedures:
    • NAS Transport.
    • Initial Context Setup.
    • E-RAB Establishment.
    • S1 Setup.
    • eNB and MME Configuration Update.
    • Handover.
    • Path Switch.
    • Status Transfer.
    • UE Context Release.
    • Reset.
    • S1 Trace Procedures.
    • Location Reporting Control.
    • Overload.
    • Paging.
Section 4 - GTP

Topic areas covered include:

  • GTP Fundamentals.
  • GTPv1-U:
    • GTPv1-U Header.
    • GTPv1-U Procedures.
  • GTPv2-C:
    • GTPv2-C Header.
    • GTPv2 Message Format.
Section 5 - Diameter

Topic areas covered include:

  • Diameter Protocol and Architecture:
    • Transporting Diameter Signalling.
    • 3GPP Diameter Interfaces.
    • Diameter Routing Agent:
      • DRA Specifics.
  • Diameter Base Protocol & AVPs:
    • Command Codes.
    • Example Message - CCR and CCA.
  • Diameter Routing and Roaming.
Section 6 - SGsAP

Topic areas covered include:

  • Introduction to SGsAP:
    • Circuit Switched Fallback:
      • CSFB Operation.
  • SGsAP Fundamentals:
    • SGsAP Protocol Stack.
    • SGsAP States.
    • SGsAP Message Set.
  • Examining SGsAP:
    • Combined Attach.
    • Mobile Terminated Call Procedure.
    • CSFB MT SMS Procedure.
    • Combined TA/LA Update.
    • CSFB Network Detach.
Section 7 - NAS EMM

Topic areas covered include:

  • Introduction to NAS EMM.
  • Stratums:
    • NAS Messages.
  • EMM and ECM States:
    • EPS Mobility Management States.
    • EPS Connection Management States.
  • NAS EMM Capabilities.
  • NAS EMM and the EPS Attach:
    • Attach Request.
    • Identity Request.
    • Authentication Request and Response.
    • Security Context Initiation.
    • Attach Accept.
    • Attach Complete.
Section 8 - NAS ESM

Topic areas covered include:

  • Introduction to NAS ESM:
    • Stratums.
    • NAS Messages.
  • EPS Session Management.
  • ESM Message Detail:
    • PDN Connectivity Request.
    • Activate Default EPS Bearer Context Request.
    • Activate Dedicated EPS Bearer Context Request.