Ericsson 4G RAN: Troubleshooting and Maintenance

Ericsson LTE System Architecture

• LTE Network architecture overview
• QOS parameters and impact on Network Performance
• ANR feature and impact on Network
• Ericsson 6000 series hardware

LTE RAN/OSS-RC Overview and Functionality

• OSS-RC, Element Manager and Command Line Interface (CLI) during a troubleshooting procedure
• Scripting (AMOS) interface and Node Command Line Interface (NCLI)
• Lock and restart boards and nodes including the soft/hard lock concept
• Check the status of the Managed Objects to find out the health of the node

Ericsson eNodeB Alarm :

• Investigate the purpose and the location of the various types of logs in a CPP Based node
• Location, purpose and reading Alarm, Event logs, Error Log and Post Mortem
• Dump(PMD) Log, Availability Log
• Data collection for Customer Service Request (CSR) when a problem is suspected in the LTE RAN network

LTE RAN Troubleshooting :

• Performance Statistics and Performance Monitoring
• Integration issues and troubleshooting procedures
• eNodeB health check by CLI (Moshell)
• Common alarms/faults in eNodeB and troubleshooting
• Mo structure EUTRAN and quick steps to get Scripts for a Managed Object in eNodeB
• Moshell Commands to get eNodeB configuration details

Check Alarm List :

• Check Alarms, and System Log
• Check Node Restarts and System Downtime
• Check CPP Hardware Boards, Free Space on Volumes
• Check Date, Time and Network Synchronization
• Check TermpointToMME and TermpointToEnodeB
• Check MME in pool configuration Check S1, X2 connections
• Check Complete eNodeB health check as a pre/post check requirements
• Check CV’s stored on eNodeB and Make a Backup CV

Script functionalities :

• DUL and DUS carrier addition Scripts
• DUL to DUS migration process and troubleshooting the common issues
• Delta GS and Baseline scripts and impact on Network performance
• RET Type 17/Type 1 related scripts and common issues
• Digital Units, Radio Configuration
• 1C, 2C and 3C related configuration
• Defining Alarm Inputs (External Alarms)

LTE RAN Signaling & Interfaces Level :

• LTE protocol
• Control and User plane protocols
• X2, S1-C, S1-U, S6/S5, S8 interfaces

LTE eNodeB Troubleshooting :

• Understand Synchronization Issue
• Sync degraded and hold over mode RBS Level
• Plug unit disabled
• Back Up & Support
• System Restore and System Downtime analysis
• RET issues and troubleshooting

Remote Delivery/SW Delivery :

• Node Integration common issues and tricks to resolve
• Software installation
• SW Verification & Up-gradation
• Performance Check (PMR)
• Force/Delta Installation and confirm upgrade
• LKF Installation through CLI and GUI
• eNodeB Pre /Post Health Check
• Traffic check /Cell availability
• X2 and S1-U/S1-C ping test
• KPI basic monitoring
• KPI Degradation /cs call/ps call test

ENQUIRE ABOUT THIS COURSE