On Tue, Apr 09, 2013 at 10:57:38PM +0200, dexter wrote:
in the openbsc.cfg i find a parameter "ms max power" which is set to 15 dBm (apporox 30mW) by default.
http://openbsc.osmocom.org/trac/wiki/osmo-nitb_VTY says the following: "maximum transmit power (in dBm) to be used by MS in this BTS. This is used in the System Information on the BCCH as well as for the MS power level at the time a dedicated channel is activated."
My question is how low may i set ms max power level? Is 15dBm already the lowest possible minimum or can i set it down to 1dBm if i like?
I just looked it up. GSM 05.05 speaks of values 0..39dBm, although the underlying thing is the 'Power control level', MS_TXPWR_MAX_CCH, which has a range of 0..31. This is also mentioned in GSM 05.08. I also found [1].
Kind regards, -Alexander Huemer
[1] http://gsm-optimization.blogspot.com/2012/04/mstxpwrmaxcch.html