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 Investigation version:
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
Create call for 70 s and idle for 10 s.
In Implementation Works:
Initiate the drive test after a site on-air. Make sure that site perform well after on-air.
Conducting tests call at a new “On-Air” site, to justify the performance of a site just after “On-Air”.
After implement new TRX or expand TRX, a drive test performed to justify that site working well with the new TRX.
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 conducted after there’s changing in neighbours database. Make sure the “add” really added and the “delete” really deleted.
Downtilt conducting, to get better coverage from each antenna. Drive test performed to make sure the better coverage from each angle changed.
Performing drive test activity to maintain the whole network. Could be an annual work.
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 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
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 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.