Dear Osmocom community,
as the pandemic continues and physical meetings are out of the question
for the forseeable future, it would be a good idea to have a periodic
virtual online meeting of the interested Osmocom community.
I was thinking of a format where we would serve two major purposes:
1) technical talks about osmocom relevant topics - ideally
current/recent developments
* can be pre-recorded to avoid any problems with technical setup,
streaming, ...
* should ideally have a Q+A session at their initial "airing" during
one OsmoDevCall
2) unstructured solicited social event (USSE)
* random chat in audio (optionally video)
* not recorded, obviously
The recording of the technical presentation should then be permanently
made available (like the presentations of our prior OsmoCon /
OsmoDevCon).
Not every OsmoDevCall would neccessarily need the two parts, but I think
it would be great if we can make that happen. We could also have e.g. a
two-weekly schedule for the USSE and a monthly schedule for the
technical presentation.
We'd need somebody to volunteer to "manage" the "broadcast" side of
this, preferably somebody with at least some prior exposure to online
events (like the c3voc).
I'm using https://osmocom.org/issues/4928 to collect a tentative list
of topics. Feel free to add your ideas there, as well as any comment/
feedback you may have.
Regards,
Harald
--
- Harald Welte <laforge(a)osmocom.org> http://laforge.gnumonks.org/
============================================================================
"Privacy in residential applications is a desirable marketing option."
(ETSI EN 300 175-7 Ch. A6)
Dear forum,
I am setting / running GSM network with LimeSdr and Osmo-packgaes:
osmo-bts-trx
osmo-bsc
osmo-hlr
osmo-msc
osmo-pcu
osmo-stp
osmo-trx-lms
and as i understand the only option to vary / set up output power is through the → osmo-bsc →
trx 0
nominal power 23
! to use full TRX power, set max_power_red 0
max_power_red 20
So does this mean that 23-20=3 dbm?
With this set up i instruct LimeSDRmini to transmit 3dbm signal into the air? If so — when i brought phone just into the very vicinity of LimeSDR antena (touching phone and SDR antena) on my smartphone screen i got signal -60 dbm …why did i get such a low figure ?
Also if you know is there any supporting application / software that can tell at what dBm LimeSDRmini is sending RF into air?
--
Mario Lucas
Dear team could you pls help me with this question
In bts config we have following entries:
trx 0
nominal power 23
! to use full TRX power, set max_power_red 0
max_power_red 20
and
osmotrx tx-attenuation (oml|<0-50>)
So why do we need these «max_power_red 20» and «osmotrx tx-attenuation» which both as i understand weaken the signal?
If we want to have a weak signal why we just don’t use only «nominal power» with whatever weak or strong signal value we want?
--
Mario Lucas
Dear team,
I did set up GSM network with SDR (LimeSDRmini).
SMS are ok.
However when try to make voice call got following message on osmo-bsc terminal:
<0003> abis_rsl.c:1372 (bts=0) CHAN RQD: reason: call re-establishment (ra=0x41, neci=0x01, chreq_reason=0x02)
<0007> osmo_bsc_sigtran.c:305 Initializing resources for new SIGTRAN connection to MSC: RI=SSN_PC,PC=0.23.1,SSN=BSSAP...
<0007> osmo_bsc_sigtran.c:351 Opening new SIGTRAN connection (id=31) to MSC: RI=SSN_PC,PC=0.23.1,SSN=BSSAP
<0003> abis_rsl.c:1372 (bts=0) CHAN RQD: reason: answer to paging (ra=0x9b, neci=0x01, chreq_reason=0x01)
<0007> osmo_bsc_sigtran.c:305 Initializing resources for new SIGTRAN connection to MSC: RI=SSN_PC,PC=0.23.1,SSN=BSSAP...
<0007> osmo_bsc_sigtran.c:351 Opening new SIGTRAN connection (id=32) to MSC: RI=SSN_PC,PC=0.23.1,SSN=BSSAP
<0004> abis_nm.c:344 BTS 0 reported connected PCU version 0.8.0
<0016> input/ipaccess.c:411 Bad signalling message, sign_link returned error: Operation not permitted.
<0016> input/ipaccess.c:411 Bad signalling message, sign_link returned error: Operation not permitted.
WHat is this bad signalling message operation not permitted?
--
Mario Lucas