Troubleshooting the E-UTRAN
This course will utilize your network service assurance tools to discuss methodical approaches to troubleshooting across the LTE E-UTRAN. Protocol level failures associated with S1AP, X2AP, RRC and NAS will all be examined, with exploration of the key KPIs monitored. In addition, issues related to mobility will also be examined, including both intra and inter RAT scenarios. In each case, examples based on the service provider’s own service assurance tools will be explored.
Section 1 - Principles of Network Performance Monitoring
Topic areas covered include:
- E-UTRAN 3GPP Counters and KPI Definitions.
- KPI Hierarchy.
- Performance Monitoring Reports.
- Example Reports.
- Activity: Identifying Key LTE KPIs used for Troubleshooting.
Section 2 - S1 Troubleshooting
Topic areas covered include:
- Detailed S1 Procedures.
- S1AP:
- KPI and Cause Code Analysis.
- Root Cause Scenarios.
- Activity: Troubleshooting S1 Issues, Investigating Current Network Issues.
Section 3 - X2 Troubleshooting
Topic areas covered include:
- Detailed X2 Procedures.
- X2AP:
- KPI and Cause Code Analysis.
- Root Cause Scenarios.
- Activity: KPIs for x2, Current X2 Issues.
Section 4 - RRC Troubleshooting
Topic areas covered include:
- Detailed RRC Procedures.
- KPI and Cause Code Analysis.
- Activity: Troubleshooting Current Network Issues.
Section 5 - LTE NAS Troubleshooting
Topic areas covered include:
- Detailed EMM and ESM Procedures.
- KPI and Cause Code Analysis.
- Root Cause Scenarios.
- Activity: Troubleshooting Current Network Issues, e.g. NAS Accessibility.
Section 6 - Troubleshooting LTE Mobility
Topic areas covered include:
- Detailed LTE and Inter-RAT Procedures.
- KPI and Cause Code Analysis.
- Root Cause Scenarios.
- Activity: Troubleshooting Current Network Issues related to mobility and retainability.