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.
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.