CalypsoBTS and modern OsmoBSC
axilirator at gmail.com
Tue May 9 17:44:40 UTC 2017
> I found that the manual from the main site is outdated.
Yeah, still couldn't find some time to update the wiki.
> If I understood it correct, I have to setup calypso bts
> as bts of type nanoBTS, correct?
Why do you think so? No, CalypsoBTS has nothing related
toip.access nanoBTS. From the other side, we don't have
a dedicated type for OsmoBTS, so you can use 'sysmoBTS'.
> I can sync with commercial cell, I can run OsmoBSC and
> OsmoBTS but I still cannot find my network from my personal
> phone in searching mode.
Please watch a great Sylvain's talk, where he explained
almost everything you need to know:
"Further hacks on the Calypso platform"
In short: BTS should transmit a continuous beacon on C0 to be
detected. Normal MS can't do that. CalypsoBTS was hacked to
perform the following timeslot layout: Tt_R_ttt, where
'T' means TX on Downlink, 'R' means RX on Uplink, and 't' means
channel filling - dummy bursts. Phone cannot RX and TX at the
same time, so one phone serves only one TS. With two phones
you have the following layout: TT_RRttt, so you have two
This is why you will have some detection troubles even with
working BSS setup :/
> In logs of osmo-bts I can see:
> <0000> rsl.c:246 Tx RSL RF RESource INDication
> <000b> trx_if.c:397 transceiver (phy0.0) rejected TRX command with
> response: 'RSP SETTSC -1'
> <0000> rsl.c:2353 (bts=0,trx=0,ts=0,ss=0) Rx RSL BCCH_INFO
Just delete the 'settsc' line from your config, because CalypsoBTS
transceiver only supports 'setbsic'.
Have a fun!
With best regards,
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