Tems Investigation : Drive Test 

In general, Drive Test can be define as a methode that used to verify the actual condition of RF signal certain operator at certain place.Several functions of drive test :- Analyzing customer complaint of certain operator in their home or office area- Finding problem in BTS ( Timeslot Check, TRX Check, Swap Feeder)- Analyzing the result of optimization process (continuity and all of area)There are softwares can be used for drivetest that installed on laptop. TEMS Investigation (Ericsson), NEMO (Nokia).Here the steps to start learning drivetest with TEMS Investigation :a. Drive Test Equipment1. TEMS Handset (complete with Charger, Headset, Data Cable) and USB Hub

2. Laptop (installed TEMS Investigation) and Adapter

3. GPS (Ext Antenna and Data Cable)

4. ATEN (Serial to USB)

5. Scanner for WCDMA (Ext Antenna GPS and RF, Data Cable)

6. Inverter and Terminal

7. Battery and Charger

Example postion of that equipments in car :

B. Laptop Configuration1. Power Management

Set Power Management Laptop always On :Start -> Settings -> Control Panel -> Power Options -> Set All Power Scheme “never”

2. Virtual MemorySet Virtual Memory :Start -> Settings -> Control Panel -> SystemAdvance -> Performance Settings

C. TEMS Investigation :- Workspace ConfigurationAfter installition process, open Tems Investigation.>> All Programs -> TEMS Investigation -> Data Collect

This is the example workspace for 2G (Mode Dedicated-Idle).

1. Open Worksheet Map & arrange size of window Map

2. GPS (Presentation -> Positioning -> GPS)3. Port Configuration (Configuration -> Port Configuration)4. Command Sequence (Control -> Command Sequence)5. Serving + Neighbours GSM (Presentation -> GSM -> Serving + Neighbours GSM)6. Current Channel (Presentation -> GSM -> Current Channel)7. Event (Presentation -> Signalling -> Events)for benchmark workspace, add Serving + Neighbours GSM and Current Channel for MS3.

- Map Configurations

Create Geoset : Click Geoset Manager on Map window 

1. On layer control   remove all layer except Pinpoint, Cell, Event, AMR, RF Quality and Coverage layer

2. Add layer Route, Road, MCOM Site, and other *.tab

3. Save Geoset4. Load Cell file : Configuration -> General -> Cellfile Load5. Use Cell Definition File then choose cell file

6. ie. Map window configured

- Port Equipment Configurations(see my older post :-))- Command Sequence ConfigurationsVoice Call CS

i.e “120/15” means 120 second on call then call end, 15 second wait and then call again.1. Loop Start give the number of repetition for command below the loop start (General -> Loop Start)2. Dial select the MS and give the destination number (Voice -> Dial)

3. Synchronize to synchcronize MS before go to the next command (General -> Synchronize)

4. Wait 120 wait 120s on call (General -> Wait)5. End Call (Voice -> End Call)6. Wait 15 wait 15 before call again (General -> Wait)7. Loop End (General -> Loop End)

Video Call CSIn general cs for video call is same as voice call, but in video call in dial command we must add “v”.i.eLoop StartDial v081384760975Wait 120End CallWait 15Loop EndD. DRIVE TEST1. Configure Recording Properties : Menu Tab Logfile -> Recording Properties2. Select recording folder : Click Browse -> Select Directory3. Select Quick logging and setup size of swap file “after reaching message “

4. Use 2G or 3G configured workspace (with spacific map : road, route, cell file)5. Make sure all equipments configured to the right port

6. Connect all 

7. After all equipments connected (symbol green), window gps, serving neighbour gsm, current channel and events will be full filled8. Don’t forget to lock TEMS Handset into GSM only or 3G only.

9. To start drive test, click record then start command sequence

10. After all route complete, wait untill call end then stop command sequence and stop recording.

Here the flow step by step Go Drive Test !!!

E. LOG FILE CHECKINGCheck logfile by playing one by one or export into MapInfo-Tab file

F. POST PROCESSING:- Report Generator1. Open TEMS Data Collection : Start -> TEMS Products -> TEMS Investigations6.1.4 Data Collection2. Menu Tab Logfile -> Report Generator3. Add logfile

4. Setup Output directory

5. Setup Report properties6. Setup IEs, Events, Mobiles, and User Details

7. Result of Report Generator in *.htm

- Map Info (Plot IEs)Before post process in mapinfo, created *.tab file from logfile in TEMS :1. Export logfile : Menu Bar Logfile -> Export Logfile

2. Click Add Order 3. Choose Format : MapInfo Tab-file4. Setup IEs (Info Elements)for GSM Dedicated or Idle :- RxLev Full (dBm)- RxLev Sub (dBm)- RxQual Full- RxQual Sub- SQI- TA- Cell Id

- Frequncy Band- Latitude- Longitudefor WCDMA Dedicated / Idle / Scanner :- AS Cell Name- AS CPICH Ec/No- AS CPICH RSCP- SAN CPICH Ec/No- SAN CPICH RSCP- SAN Cell Id (CI Part)- Sc 1st Aggr Ec (dBm) -> Scanner- Sc 1st Aggr EcIo (dB) -> Scanner- Sc Best SC -> Scanner- Latitude- Longitude5. Configure Options Tab

6. Save *.mex7. Choose Logfile : Click Browse file8. If there are more than one logfile we can merge it by Merge Output9. Choose Output directory : Click Browse dir10. Give Prefix : Ded if Dedicated and Idle if Idle

11. Start process, click start 

12. If done, status Success13. There were created four files for each action (*.dat, *.id, *.map, *.tab)

14. Open the exported file into MapInfo : Menu Tab File -> Open

15. Create Thematic Map : Menu Tab Map -> Create Thematic Map16. Choose Type -> Range17. Template Name -> Region Ranges

18. Choose Table and Field (ie. Plotting RXQUAL_SUB from Dedicated mode)

19. Customize Ranges, Style and Legend.

20. Example Dedicated by RXQUAL_SUB

EVENTS on RXQUAL_SUB21. Create Events on RXQUAL_SUB22. Open again the exported file (Ded_orinaica)23. Create Thematic Map : Menu Tab Map -> Create Thematic Map24. Choose Type -> Individual

25. Template Name -> Region IndValue Default26. Choose Table and Field

27. Customize Style and Legend

28. Example Events on RXQUAL_SUB

SPIDER GRAPH29. Activate spider graph : Menu Tab Tools -> Tool Manager30. Spider Graph Load and Autoload31. See table structure of cell in MCOM Site : Menu Tab Table -> Maintenance -> Table Structure -> View/Modify Table choose MCOM Site

32. See table structure of CI in exported file : Manu Tab Table -> Maintenance -> Table Structure -> View/Modify Table choose exported file (ie. Ded_orinaica) -> Change type structure of CI

33. Click OK34. Create Spider Graph : Tools -> Spider Graph -> Spider Graph35. Choose Origin and Destination table

36. Save the Spider Graph table : Save Copy As -> (ie. orinaica)37. From Spider Graph, We can analyze :- Dominant Cells- Overshoot Cells- Swap Feeder

G. TROUBLESHOOTING :- 2G Frequency ScanningPurpose : to verify level signal each BCCH ARFCN plan

1. Setup frequency scan : Click Scan Properties 2. Select channels : Tab Scanned channels -> Manual selection -> Select3. Setup Selected Channels (ie. BCCH ARFCN are 95-113)

4. Decode BSIC

5. Start Scanning : Click toolbar Start Scanning 6. See Scanner Bar Chart Window : Menu Bar Presentation -> GSM -> Frequency Scanner -> Scanner Bar Chart

- Time slot checkPurpose : Check Time Slot in each TCH (if Freq Hop : NO or Base Band)1. Setup Channel Verification : Menu Bar Control -> GSM Channel Verification

2. Setup test phone number : Click Properties on Channel Verification window 

3. Green mark means time slot have been used

- TRX CheckPurpose : to verify damage TRX in each sectorWhere is TRX ?

1. Lock BCCH ARFCN certain sector : Click Toolbar Lock on Channel   (ie. Check TRX Sector 1, Lock BCCH 111)

2. Disable Handover : Click Toolbar Disable Handover 3. See MAIO on Current Channel window

- Swap Feeder CheckPurpose : to verify intalation mistake on feeder cable to BTS

1. Lock BCCH ARFCN each sector : Click Toolbar Lock on Channel   (ie. BCCH Sect 1 = 547, Sect 2 = 540, Sect 3 = 543 )

2. Set HO Target : Equipment Properties -> Dedicated Mode -> Function -> Target HO (ie. BCCH 547, 540, 543)

3. Create drive route that can represent each sector4. Export logfile into *.tab with IEs CI

5. Create thematic map for each CI (Cell Identity)

Picture above indicate swap feeder between sector 2 and 3.

Posted by Pathloss 4.0 Labels: Tems Investigation