1 / 43

Site Troubleshooting Guide

Site Troubleshooting Guide. LTE. RBS 6000 Series. RBS 6101. RBS 6201. RBS 6601. RBS 6301. RRU. RBS 6102. MetroPCS primarily uses RBS 6201 inside a weatherized cabinet MetroPCS primarily uses SIMO Some sites will use RBS 6601 with RRUs, but not currently available. Weatherized Cabinet.

maximos-zale
Télécharger la présentation

Site Troubleshooting Guide

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Site Troubleshooting Guide LTE

  2. RBS 6000 Series RBS 6101 RBS 6201 RBS 6601 RBS 6301 RRU RBS 6102 • MetroPCS primarily uses RBS 6201 inside a weatherized cabinet • MetroPCS primarily uses SIMO • Some sites will use RBS 6601 with RRUs, but not currently available

  3. Weatherized Cabinet • Majority of MetroPCS sites are outdoors

  4. Cabinet – Back

  5. RBS 6201 Hardware DUL – Digital Unit LTE RU – Radio Unit SIMO Tx/Rx1 Rx2

  6. Cabinet Diagram Fans Radio RUs DUL CC Power SIU C Transmission

  7. Cabinet – No Jumpers Power RUs DULs SIU

  8. Cabinet – Jumpers Antenna Jumpers Power DUL RUs

  9. Diplexer Site Diplexer LTE CDMA Output Input

  10. Diplexer Detail Output Input Diplexers

  11. Visit Preparation • Printed Materials • RFDS Sheet with all plumbing diagrams • Notes about site access • Directions • Satellite image • Site Shakedown report • Equipment • Cabinet key • Dummy load set • Sitemaster • Laptop setup to run TEMS Investigation with UE

  12. Equipment Sitemaster Laptop with UE Cabinet Key

  13. First Steps • Best Practices • Take photos! • Be prepared • Ensure E-UTRAN support is available • Notify relevant parties based on customer procedures • Visual Inspection • Make sure nothing immediately looks incorrect • Trace the RU-DUL cables to ensure there are no swaps • Ensure the RU-DUL cables have a good connection • Check small QMA wave guide for damage and ensure connection

  14. Photos • Take a photo of the site label to identify pictures

  15. RU to DUL Jumper check • Ensure the RU-DUL jumpers are correct DUL RU RU-DUL Jumpers

  16. RUL QMA Wave Guide Check • Check small QMA wave guide for damage and ensure connection Bent Correct

  17. RUL QMA Wave Guide Check Bent Connector Disconnected Connector

  18. Common Issues • Sector Swaps • DL or UL throughput low • Bad or no coverage • Azimuth incorrect

  19. Sector Swaps • Causes • RU-DUL cables • Jumpers from cabinet to diplexer • Jumpers from diplexer to antenna feeders • Antenna feeders to antennas • CDMA incorrect • Do not trust colors on cables • Troubleshooting Steps • E-UTRAN lock test • Cable tracing

  20. E-UTRAN Lock Test • Procedure • Have E-UTRAN lock a single sector • Verify the reference signal transmit light stops blinking • Repeat for each sector • Conclusion • Ensures that the DUL is configured correctly • Verifies there is no RU-DUL cable swap

  21. E-UTRAN Lock Test • Blinking • Transmitting reference signals • No Light • Locked

  22. Antenna Jumper check • Verify all cables match colors in plumbing diagrams • Non-diplex site • Trace the antenna jumpers from the RUL to the back of the cabinet • Trace the antenna jumpers from the cabinet to the antenna feeders • Diplex site • Trace the antenna jumpers from the RUL to the back of the cabinet • Trace the antenna jumpers from the cabinet to the diplexer • Trace the antenna jumpers from the diplexer to the antenna feeders

  23. Antenna Jumper Check • Verify all cables match colors in plumbing diagrams Sector 4 Sector 5 Sector 6

  24. Antenna Jumper Check • Trace the antenna jumpers from the RUL to the back of the cabinet Jumpers exit cabinet Jumpers at RUL

  25. View – Cabinet Back Jumpers exit cabinet

  26. Antenna Jumper Check • Trace the antenna jumpers from the cabinet to the antenna feeders Jumpers from cabinet Antenna feeders

  27. Antenna Jumper Check – Diplex • Trace the antenna jumpers from the cabinet to the diplexer Jumpers from cabinet Jumpers enter Diplexer

  28. Antenna Jumper Check – Diplex • Trace the antenna jumpers from the cabinet to the diplexer Jumpers from cabinet Jumpers enter Diplexer

  29. DL or UL throughput low • Causes • Backhaul • Antenna system and jumpers • Hardware problems with RU-DUL • Troubleshooting Steps • Dummy Load Test • Feeder Sweeps • E-UTRAN support

  30. Dummy Load test • Procedure • Trace the power connector to the RUL and turn it off • Detach the antenna jumpers from the RUL • Connect the attenuators to the RUL • Connect the dummy antennas to the attenuators • Power on the RUL • Have EUTRAN unlock the target sector and lock all other sectors • Place the UE near the dummy antennas • Upload and download a file and record a TEMS log • Conclusion • Eliminates or identifies antenna system cause of problem

  31. Dummy Load Test • Trace the power connector to the RUL and turn it off Power light off

  32. Dummy Load Test • Detach the antenna jumpers from the RUL Disconnected Jumpers

  33. Dummy Load Test • Connect the attenuators to the RUL Use high power attenuators Adapters Attenuators Ensure attenuators are connected to both Tx/Rx2 and Rx2

  34. Dummy Load Test • Connect the dummy antennas to the attenuators Attenuators Dummy antennas

  35. Dummy Load test • Power on the RUL Power light on Power Button Power Connector

  36. Dummy Load Test • Have EUTRAN unlock the target sector and lock all other sectors Ensure blinking

  37. Dummy Load Test • Place the UE near the dummy antennas Dummy antennas UE

  38. Dummy Load Test • Upload and download a file and record a TEMS log

  39. Feeder Sweeps • Tests • Voltage Standing Wave Ratio • Return Loss • Distance to Fault • Covered in a different guide • Conclusion • Determines if there are problems in the antenna system

  40. E-UTRAN support • Procedure • Connect to the cell (dummy load or otherwise) • Download or upload a file • Have E-UTRAN monitor the node • Conclusion • Determines if there is a configuration problem or a problem in the backhaul

  41. Bad or No Coverage • Causes • Antenna System • Jumpers not connected • Hardware problems with RU-DUL (damaged connectors) • Troubleshooting Steps • Ensure all connectors are tightly secured • Dummy Load Test • Feeder Sweeps

  42. Incorrect Azimuth Troubleshooting Steps • Drive Test • Visual inspection of antenna direction

  43. THANK YOU

More Related