CalypsoBTS + GPRS and SDR suggestion

This is merely a historical archive of years 2008-2021, before the migration to mailman3.

A maintained and still updated list archive can be found at https://lists.osmocom.org/hyperkitty/list/baseband-devel@lists.osmocom.org/.

Steve Markgraf steve at steve-m.de
Tue May 9 00:12:49 UTC 2017


Hi,

On 08.05.2017 23:52, Vadim Yanitskiy wrote:
> With two Calypso phones it becomes possible to serve two timeslots.
> Basically, second phone serves one TCH timeslot, but (if I am correct)
> PDCH has no fundamental differences from TCH, so its support could be
> implemented too.
>
> After a quick look at OsmoTRX source code, I can assume, that the only
> difference between TCH channel combinations (I, II and III) and PDCH
> channel combination (XIII) is a fillerModulus value. Correct me if I am
> wrong.

Actually GPRS works fine with CalypsoBTS for years. Last time I've
tested this was last year, and there was a small patch required in order
to allow a PDCH in TS1 with the 'nanoBTS', but that's it.

I've put it here:
https://steve-m.de/files/calypso_bts/

Regards,
Steve



More information about the baseband-devel mailing list