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.

Completion Time:

The estimated completion time for this course is nine hours. The maximum allotted time is six months from enrollment.

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Outline:

RRC

Topic areas covered include:

• Introduction to RRC: –
  • Air Interface Protocol Stack
  • RRC States
  • RRC Connection
• E-UTRA Radio Bearers:
  • Signalling Radio Bearers: –
    • 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

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

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

GTP

Topic areas covered include:

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

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

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

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

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