Atoll GSM Prediction

[b0r3l_1]

Hi All

I need your comments and suggestions. Whenever I calculate on GSM prediction, the output coverage is somewhat very ideal even though I imported the clutters and terrain data. Another thing is, the area of coverage is limited to 3km radius so every site is forming a circle. Is this really how atoll calculates or there something wrong with my data. Kindly refer to my attached captured image.

Thanks

[ledhie]

Have you check propagation model?

[b0r3l_1]

Yes, im using the default okumura-hata model. How will will I calibrate it? Thanks

[tremalnike]

It's not related to calibration.For every transmitter In Transmitter properties --> Propagation increase Radius to value that you want. You can do that for all transmitters in transmitter table.

http://www.finetopix.com/picture.php?albumid=21&pictureid=110

[b0r3l_1]

@tremalnike

I've already changed the radius before but still have the same result.

[ledhie]

Maybe you can try another model, you can find some tool to do that in this forum, example Crosswave prop. model from this thread : http://www.finetopix.com/atoll/16087-t-o-l-l-3-1-here-5.html

post #42 by dimitry28... and maybe if you lucky you can get help from the expert there....( FYI, I'm not include "the expert" there)

After that you can compare for the result from your model and crosswave model, which one more realistic.

[redendo]

This kind of simulation is appreciated in the initial network dimensionning for coverage and capacity issue, but after that a calibrated model or a ray tracing models like crosswave is much more needed to get more realistic prediction

Kind regards

[b0r3l_1]

Hi

Anyone has the lic file for the crosswave propagation? thanks

[kevin_h811]

B0r3l_1,

Have you input your drivetest logfiles in CSV form,it does help too.

br//

[telwind]

it looks your terrain data is not imported properly or it is too flat.

change propagation models, calculation radius and resolution may give more better looking.