Presentation is loading. Please wait.

Presentation is loading. Please wait.

Site Troubleshooting Guide LTE. RBS 6000 Series RBS 6102 RBS 6101RBS 6201RBS 6601RBS 6301RRU MetroPCS primarily uses RBS 6201 inside a weatherized cabinet.

Similar presentations


Presentation on theme: "Site Troubleshooting Guide LTE. RBS 6000 Series RBS 6102 RBS 6101RBS 6201RBS 6601RBS 6301RRU MetroPCS primarily uses RBS 6201 inside a weatherized cabinet."— Presentation transcript:

1 Site Troubleshooting Guide LTE

2 RBS 6000 Series RBS 6102 RBS 6101RBS 6201RBS 6601RBS 6301RRU 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 C Transmission CC Power RUs DUL SIU

7 Cabinet – No Jumpers Power DULs RUs SIU

8 Cabinet – Jumpers Power DUL RUs Antenna Jumpers

9 Diplexer Site Diplexer Input Output LTE CDMA

10 Diplexer Detail Input Output 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 Cabinet Key Sitemaster Laptop with UE

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-DUL Jumpers RU

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

17 RUL QMA Wave Guide Check Bent ConnectorDisconnected 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 Sector 4 Verify all cables match colors in plumbing diagrams 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 Jumpers from cabinet Antenna feeders Trace the antenna jumpers from the cabinet to the antenna feeders

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

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

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 Adapters Use high power attenuators Ensure attenuators are connected to both Tx/Rx2 and Rx2 Attenuators Connect the attenuators to the RUL

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

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

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

37 Dummy Load Test Dummy antennas Place the UE near the 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


Download ppt "Site Troubleshooting Guide LTE. RBS 6000 Series RBS 6102 RBS 6101RBS 6201RBS 6601RBS 6301RRU MetroPCS primarily uses RBS 6201 inside a weatherized cabinet."

Similar presentations


Ads by Google