this document is about TEMS investigations

1. PREPARED BY
KHALID RAEE

2. WHY DT
 Non–working sites/sectors or TRXs
 In–active Radio network features like frequency hopping
 Disabled GPRS
 Overshooting sites – coverage overlaps
 Coverage holes
 C/I, C/A analysis
 High Interference Spots
 Drop Calls
 Capacity Problems
 Other Interference Sources
 Missing Neighbors
 One–way neighbors
 Ping–Pong Handovers
 Not happening handovers
 Accessibility and Retain ability of the Network
 Equipment Performance
 Faulty Installations

3. AFTER DT
 Post processing of data
 Plotting RX Level and Quality Information for
overall picture of the driven
 area
 Initial Discussions on drive test with Local
engineers
 Reporting urgent problems for immediate
action
 Analyzing Network feature performance after
new implementations
 Transferring comments on parameter
implementations after new changes

4. TEMS TOOL
 Tems 5.1
 Tems 6.1

5. Tems 5.1
 1 or 2 tems sets
 Tems kit with an internal antenna
 GPS
 1 dongal key

6. Tems 6.1
 2 tems set
 1 tems kit with 2 external antennas
 GPS
 1 dongal key
 1 hub

7. How to connect?
1. Connect tems kit, dongal key and GPS
leads to the system (computer)
2. In the Tems’ “Configuration” menu,
select “Equipment Configuration”
3. Click on the “Add” icon.
4. Enter port number and device attached
on that specific port.

9. Tems main
window

10. Open map window

12. Loading cell file

13. CURRENT CHANNEL
WINDOW

14. RADIO PARAMETER

15. SERVING AND
NEIGHBOUR

16. GSM LINE CHART

17. MODES OF TEMS
 ONE TEMS IN IDEAL MODE FOR
CHECKING NETWORK RX LEVEL
 ONE TEMS IN DEDICATED MODE
CHECKING NETWORK QUALITY
 FREQUENCY SCANNING

18. SIGNALLING
LAYER 3 MESSAGES

19. DROP CALL
 Call can get drop because of
assignment failure(layer 3 msg) having
its R L time
out/interference/quality/level/overshootin
g issues.
 Call can get drop because of NO
service(layer 3 msg) having its R L time
out/interference/quality/level/overshootin
g issues.

20. BLOCKED CALL
 Blocked call can happen with NO
ASSIGNMENT FAILURE(layer-3 Msg)
as the result of data link failure during
signalling.
 No alerting or Connect(layer-3 Msg) .
 NO ASSIGNMENT FAILURE(layer-3
Msg) as a result of NO SDCCH
allocation after 4 re-transmission of
immediate assignment.

21. BLOCKED CALL
 DATA LINK FAILURE (layer-3 msg)
because layer-2 protocols were not
recognized in layer-3.

22. BLOCKED CALL

23. IDLE MODE BEHAVIOUR

24. CAMPIN ON WRONG
CELL

25. C/I APPEARENCE

26. LOW SIGNAL LEVEL

27. LACK OF DOMINANT
SERVER

28. SUDDEN APPEARANCE &
DISAPPEARENCE OF
NEIGHBOURS

29. SUDDEN DECREASE IN
LEVEL

30. Stable Behavior

31. RX Levels too Closed to Each
Other

32. RX Levels of Many Cells are
Almost the Same

33. Log File Recording on
Resume

34. Drop Call due to Bad
Coverage

35. Bad Quality due to Signal
Strength – FER is Bad

36. Bad Quality due to Signal
Strength – FER is OK

37. Problem 1

38. Problem 2

39. Problem 1

40. Problem 6