chan_alloc.c help

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Neels Hofmeyr nhofmeyr at sysmocom.de
Mon Sep 5 10:14:56 UTC 2016


On Fri, Sep 02, 2016 at 03:18:30PM +0100, Abdulghafar Shabaneh wrote:
> Now I ran the osmo-nitb, osmo-bts-trx and osmo-trx all together with the
> USRP2 with FLEX900 daughter board GSM900 band, it all works well except the
> mobile is not able to register on the network.

I haven't looked at your error logs in detail, this is just what comes to
mind:

Response speed may be an issue. Hopefully the pi is fast enough, and maybe
try to run
  osmo-bts-trx -r 1
and
  osmo-pcu -r 1
for real-time priority (may need sudo).

Also, the timing source for the SDR may be an issue. I am told e.g. the
B200 is known to be unreliable without a quality timing source, and
results improve with a proper 10MHz clock connected.

~Neels

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