Hi, list!
I'm trying to understand how the options "nominal power" and "max_power_red" work...
Last Friday I tried to place 4 BTS in a rectangle of about 100x20 meter and then I examined the measurement reports of a mobile. They are very very bad, and oft it cannot see a cell. Then I tried to change the value of "nominal power" (max_power_red did not changed) and retry to check the measurement reports. No changes... :(
Now I'm here in my office with a spectrum analyzer and try to change these values, but what I see in the spectrum analyzer is always the same... I restart OpenBSC after any change, of course!
Could you please help me to understand what these values mean and how can I boost the signal?
Thanks a lot in advance for your help!
Hi,
I'm trying to understand how the options "nominal power" and "max_power_red" work...
nominal power is the _specified_ max power of the BTS, it's used _only_ for display in openbts and is never transmitted and doesn't actually change anything. Basically it just tells OpenBSC how strong your BTS is so it can display it in the "show ..." commands. That's because without this, openbsc has no way to know it.
max_power_red is the maximum power reduction compared to the nominal power applied by the BTS during power control. So 0 for max power.
Cheers,
Sylvain
PS: Apparently nominal power _is_ sent to the BTS in the abis_om2000.c (for the Ericsson BTS) ... Some custom configuration stuff I guess.
Am Mon, 04 Apr 2011 12:28:52 +0000 schrieb 246tnt@gmail.com:
nominal power is the _specified_ max power of the BTS, it's used _only_ for display in openbts and is never transmitted and doesn't actually change anything. Basically it just tells OpenBSC how strong your BTS is so it can display it in the "show ..." commands. That's because without this, openbsc has no way to know it.
max_power_red is the maximum power reduction compared to the nominal power applied by the BTS during power control. So 0 for max power.
Hi, Sylvain,
Thanks for your answer! Nevertheless I can't understand how these parameters work... I just set nominal power to 100, and then tried to change max_power_red. With my spectrum analyzer I can't see any difference in the capacity. I always receive signal with a capacity of about -13.30 dBm, regardless of which max_power_red I wrote...
Could you please explain me this?
Thanks a lot again! Luca
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Luca Bertoncello