LTE Protocols

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.
Course Introduction
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Section 1 - RRC
Section 2 - X2AP
Section 3 - S1AP
Section 4 - GTP
Section 5 - Diameter
Section 6 - SGsAP
Section 7 - NAS EMM
Section 8 - NAS ESM

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.

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.

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.

Topic areas covered include:

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

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.

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.

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.

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.

The Institute of Telecommunications Professionals (ITP)

The ITP is the UK’s leading independent institution for people who work in telecommunications. It is dedicated to promoting the professional development of members through Professional Registration, training, mentoring and qualifications. The ITP collaborates with regulators, government associations and other leading bodies on projects that are important to the future of the industry. It has worked with businesses including; BT, Cable & Wireless Worldwide, Alcatel-Lucent, Huawei and Vodafone.  Find out more about The ITP and how you can become a member.

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