Upload
ikbalfauzi
View
364
Download
52
Embed Size (px)
DESCRIPTION
Describe how to do troubleshooting lte eNB
Citation preview
© 2006 Clearwire Corporation CONFIDENTIAL & PROPRIETARY, Limited Distribution to Authorized Persons Only
Huawei LTE eNodeB Troubleshooting Overview
• Jeff Fry, Wimax/LTE Systems Integration & Test, Technology Development
LTE eNodeB Troubleshooting Document:
• <Some location on portal>
LTE eNodeB Troubleshooting Overview:• LTE LMT/EMS • Subscriber Troubleshooting• eNodeB Troubleshooting• eNodeB Log Files
© 2006 Clearwire Corporation CONFIDENTIAL & PROPRIETARY, Limited Distribution to Authorized Persons Only
Dual-mode Wimax/LTE: Basics
• TD-LTE, Band 41– EARFCN=40590 (freq=2590MHz)– 20 MHz
• LTE deployed as 3 sectors using Reuse-1 (one frequency).• Each configured carrier is a Cell.• LTE initially deployed as S111.
© 2006 Clearwire Corporation CONFIDENTIAL & PROPRIETARY, Limited Distribution to Authorized Persons Only
Network Architecture
• MME – Mobile Management Entity controls mobile signaling: network attach/authentication (to HSS), handovers, idle mode
• SGW – Service Gateway provides the user plane data traffic.• HSS – Home Subscriber Server provides subscriber provisioning.• Important interfaces from the eNodeB:
– S1-U : interface to the SGW– S1-MME : interface to the MME– X2 : interface to another eNodeB for mobility
© 2006 Clearwire Corporation CONFIDENTIAL & PROPRIETARY, Limited Distribution to Authorized Persons Only
Dual-mode Wimax/LTE: Shared BS
• Wimax and LTE run on the same base station with addition of LTE cards.
• Wimax and LTE share the same radio head (RRU).• Separate backhaul for Wimax & LTE. GigE for LTE and 100MB ETH
for Wimax.
LTE Cards: LBBP, LMPT
LTE Carriers on 2nd fiber
Wimax Carriers on 1st fiber
© 2006 Clearwire Corporation CONFIDENTIAL & PROPRIETARY, Limited Distribution to Authorized Persons Only
eNodeB LMT Access
• Local Maintenance Terminal is still web-based HTTP.• Primary use MML for field techs.• Access is local or remote.
© 2006 Clearwire Corporation CONFIDENTIAL & PROPRIETARY, Limited Distribution to Authorized Persons Only
EMS for LTE: Main Topology
• eNodeB Topo Object is initially created in a default EASY_DEPLOYMENT subnet alongside Wimax BTS.
• Can be moved to a new LTE subnet.
© 2006 Clearwire Corporation CONFIDENTIAL & PROPRIETARY, Limited Distribution to Authorized Persons Only
EMS for LTE: CME
• New CME (CM Express) menu/component for configuration management.• Configuration viewing only via Panorama Browser. View many eNodeB
configurations in bulk.• Configuration changes made in a planned area (workspace).• Parameter comparison and audit functions available.
© 2006 Clearwire Corporation CONFIDENTIAL & PROPRIETARY, Limited Distribution to Authorized Persons Only
EMS for LTE: Alarms
• Alarms can be sent by the Wimax BS and eNodeB.• Some alarms are common and will only be sent by the Wimax BS.
© 2006 Clearwire Corporation CONFIDENTIAL & PROPRIETARY, Limited Distribution to Authorized Persons Only
Subscriber Troubleshooting
• Subscriber troubleshooting options in LTE are limited.• DSP S1INTERFACE:;• That’s it! No subscriber mac tracing or signal tracing due to architecture.
© 2006 Clearwire Corporation CONFIDENTIAL & PROPRIETARY, Limited Distribution to Authorized Persons Only
eNodeB Troubleshooting: Equipment Status
• Maintenance->Device Panel to visually see equipment and status.
© 2006 Clearwire Corporation CONFIDENTIAL & PROPRIETARY, Limited Distribution to Authorized Persons Only
eNodeB Troubleshooting: Equipment Status (2)
• DSP BRD:; Shows LTE boards and occupied Wimax slots.
• DSP BRDVER:; Shows board versions.
© 2006 Clearwire Corporation CONFIDENTIAL & PROPRIETARY, Limited Distribution to Authorized Persons Only
eNodeB Troubleshooting: Equipment Status (3)
• LST ALMAF:; Shows LTE only alarms.• DSP GPS:; Shows GPS status.
• Resetting:– RST ENODEB:;– RST BRD:;
© 2006 Clearwire Corporation CONFIDENTIAL & PROPRIETARY, Limited Distribution to Authorized Persons Only
eNodeB Troubleshooting: Configuration Management
• View LTE configuration via CME Panorama Browser.
• Make configuration changes via MML or a CME workspace.
© 2006 Clearwire Corporation CONFIDENTIAL & PROPRIETARY, Limited Distribution to Authorized Persons Only
eNodeB Troubleshooting: Configuration Management (2)
• Configuration backup, restoring, and download via Maintenance->Backup Management->NE Backup
© 2006 Clearwire Corporation CONFIDENTIAL & PROPRIETARY, Limited Distribution to Authorized Persons Only
eNodeB Troubleshooting: Configuration Management (3)
• Configuration audits can be performed via CME->Compare Parameters.• Compare with other eNodeBs and templates.
© 2006 Clearwire Corporation CONFIDENTIAL & PROPRIETARY, Limited Distribution to Authorized Persons Only
eNodeB Troubleshooting: eNodeB Licensing
• LTE has a new licensing scheme: – Separate license file for each eNodeB.– License file provided by Huawei based on ESN.– License applied during commissioning process.
• License->NE License Management->Standalone License to apply and view licenses.
• DSP LICENSE:; MML command to view actual license data on eNodeB.
© 2006 Clearwire Corporation CONFIDENTIAL & PROPRIETARY, Limited Distribution to Authorized Persons Only
eNodeB Troubleshooting: S1 Configuration and Status
• S1-MME and S1-U interfaces to MME and SGW respectively.• X2 interfaces to other eNodeBs for mobility signaling.• SCTP is transport layer for S1 and X2.• SCTP link status:
– LST SCTPLINK:;– DSP SCTPLNK:SCTPNO=0;
• DSP S1INTERFACE:; S1 Interface Status.
• DSP X2INTERFACE:; X2 Interface Status.
• LST S1SIGIP:; S1-MME configuration.• LST S1SERVIP:; S1-U configuration.• LST X2ENODEB:; X2 configuration.
© 2006 Clearwire Corporation CONFIDENTIAL & PROPRIETARY, Limited Distribution to Authorized Persons Only
eNodeB Troubleshooting: Cell Configuration and Status
• DSP CELL:; Shows cell status.
• LST CELL:; Shows cell configuration.
© 2006 Clearwire Corporation CONFIDENTIAL & PROPRIETARY, Limited Distribution to Authorized Persons Only
eNodeB Troubleshooting: Cell Configuration and Status (2)
• BLK CELL / UBL CELL – activate/deactivate cell – CELL_HIGH_BLOCK - immediately deactivates cell.– CELL_MIDDLE_BLOCK – deactivates after a time period.– CELL_LOW_BLOCK – deactivates when no subs.
• ACT CELL / DEA CELL – activate/deactivate cell is equivalent to CELL_HIGH_BLOCK.
© 2006 Clearwire Corporation CONFIDENTIAL & PROPRIETARY, Limited Distribution to Authorized Persons Only
FIN
• Questions?