TEMS Training

WHAT’S TEMS….?

TEMS = Test Mobile System

Solution Tools for Wireless Network to Plan, optimized, and expand their systems.  A Test tool use to read and control information sent over the Air Interface between the base station and the mobile station in GSM/cellular system. It can also used for radio coverage measurement.

Product of TEMS

•TEMS Transmitter
• TEMS Light
• TEMS Indoor
• TEMS Investigation
• TEMS Deskcat
• TEMS Drive Tester
• TEMS Pocket
•TEMS Automatic
• TEMS CellSight
• TEMS Visualization
•TEMS CellPlanner
• TEMS LinkPlanner

TEMS Investigation version:

• TEMS Classic/98  : SH888; post process with 3rd-party-s/w
• TEMS 2  : R230; post process with 3rd-party-s/w
• TEMS 3  : R520; post process with 3rd-party-s/w
• TEMS 4  : T68; export from TEMS
• TEMS 5  : T610; export from TEMS
• TEMS 6  : various handset; data collection & route analysis
• TEMS 7  : various handset; data collection & route analysis
• TEMS 8  : various handset; data collection & route analysis
• TEMS 9  : various handset; data collection & route analysis
• TEMS 10  : various handset; data collection & route analysis

As Drive Test Tools

Drive Test =  Testing the network in particular area to give the real picture of the network’s performance on the field, with a certain tools.

Drive Test Equipments

- Power supply needed, usually using inverter in the car from laptop, GPS and MS

- GPS should use external antenna

- MS can use external antenna or not use external antenna.  (Use external antenna means measure RxLevel “Pedestrian / Street Level”). (Not use external antenna means measure RxLevel “ In car level) -> more realistic resultIf using scenario not external antenna, MS position should be carefully chosen and stable during drive test

MODE OF DRIVE TEST

1. Dedicated / Continuous / Long Call Mode
Making continuous call along drive test activity. Before starting the route, call the drive test number, ex. 199 for Telkomsel, and only stop the call when the route (drive test) finish.
2. Idle Mode
Along the drive test activity, the MS is “ON” but no call occur.
3. Sequential / Qos / Short Call Mode
Creating the sequence of call along the drive test activity, Before starting the route create call sequence,  for example:

Create call for 70 s and idle for 10 s.

In Implementation Works:

• Drive Test New Site/ Initial Drive Test

Initiate the drive test after a site on-air. Make sure that site perform well after on-air.

•  Test Call New Site

Conducting tests call at a new “On-Air” site, to justify the performance of a site just after “On-Air”.

•  Drive Test Upgrade/Expand TRX

After implement new TRX or expand TRX, a drive test performed to justify that site working well with the new TRX.

•  Drive Test SFH/Hopping implementation

After implement SFH/hopping in the network, a drive test performed to justify that this hopping solution working well with the whole network.

In Optimization works:

•Drive Test Handover/ Add & Delete neighbors

Drive test conducted after there’s changing in neighbours database. Make sure the “add” really added and the “delete” really deleted.

• Drive Test before & after Downtilt

Downtilt conducting, to get better coverage from each antenna. Drive test performed to make sure the better coverage from each angle changed.

• Drive Test Network Audit

Performing drive test activity to maintain the whole network. Could be an annual work.

• Drive Test Benchmark

performing drive test to get justification about ‘our’ network. Can compete or not. With comparing the whole network including ‘us’ in drive test.

• Drive Test troubleshooting

Drive test for special troubleshooting case. Such as, a site that cannot handover from sites surround it, a site that cannot transmit good signal and cannot achieve its coverage

How TEMS works ?

Several measurement is only available and recorded in idle mode (C1,C2 etc)

Several measurement is only available and recorded in dedicated mode (RxQual, SQI, FER etc)

This is happen because of GSM system network works, not because setting in TEMS

There are several option/feature can be activated by user (force handover, lock handover etc) which change TEMS measurement behavior

IMPORTANT NOTICE :

In GSM network there are a lot of parameters which change the network behavior, it is make the network very flexible.

Due to this reason, TEMS has ability to monitor network with parameters on (FULL mode)  and with parameters off (SUB mode) for such as RxLev and RxQual.

When using FULL measurement result ?
Whenever we want to see BTS parameters settings works at live network DTX off

When using SUB measurement result ?

Whenever we want to see BTS works without parameters DTX on

How TEMS measure FULL or SUB measurement ?

TEMS record both SUB and FULL measurement at the same time and at the same log files, it is just need to set what we want to see in replay mode.

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By Blog Kreasi Anak Negeri Posted in ARSIP

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