4 Apr
2011
4 Apr
'11
2:03 p.m.
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!
--
_______________________________________________________________________
Luca Bertoncello
Entwicklung Mail: bertoncello(a)netzing.de
NETZING Solutions AG Tel.: 0351/41381 - 23
Fröbelstr. 57, 01159 Dresden Fax: 0351/41381 - 12
_______________________________________________________________________
Impressum:
NETZING Solutions AG - Fröbelstraße 57 - 01159 Dresden
Sitz der Gesellschaft Amtsgericht Dresden HRB 18926
Vorstand Dieter Schneider - Aufsichtsratsvorsitzender Volker Kanitz
USt.Id DE211326547 Mail: netzing.ag(a)netzing.de
4 Apr
4 Apr
2:28 p.m.
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.
2:43 p.m.
Am Mon, 04 Apr 2011 12:28:52 +0000
schrieb 246tnt(a)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
--
_______________________________________________________________________
Luca Bertoncello
Entwicklung Mail: bertoncello(a)netzing.de
NETZING Solutions AG Tel.: 0351/41381 - 23
Fröbelstr. 57, 01159 Dresden Fax: 0351/41381 - 12
_______________________________________________________________________
Impressum:
NETZING Solutions AG - Fröbelstraße 57 - 01159 Dresden
Sitz der Gesellschaft Amtsgericht Dresden HRB 18926
Vorstand Dieter Schneider - Aufsichtsratsvorsitzender Volker Kanitz
USt.Id DE211326547 Mail: netzing.ag(a)netzing.de
4782
days inactive
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246tnt＠gmail.com -
Luca Bertoncello