osmo-bts-trx: "CHAN RQD: no resources for SDCCH" on master

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Tom Tsou tom at tsou.cc
Wed Jun 15 20:19:44 UTC 2016


On Wed, Jun 15, 2016 at 12:50 PM, Alexander Chemeris
<alexander.chemeris at gmail.com> wrote:
>> diff --git a/src/osmo-bts-trx/trx_if.c b/src/osmo-bts-trx/trx_if.c
>> index a4c16dc..8c9a839 100644
>> --- a/src/osmo-bts-trx/trx_if.c
>> +++ b/src/osmo-bts-trx/trx_if.c
>> @@ -47,7 +47,7 @@
>>  //#define TOA_RSSI_DEBUG
>>
>>  int transceiver_available = 0;
>> -int settsc_enabled = 0;
>> +int settsc_enabled = 1;
>>  int setbsic_enabled = 0;
>
> Could you explain why is that required?

Because osmo-trx only supports setting the training sequence through
the SETTSC command. There is some history of the code that I am not
familiar with. There is a SETBSIC command on the osmo-bts side of the
interface, but that command does not exist in osmo-trx side. Perhaps
SETBSIC previously existed in OpenBTS at one point in time?

> I don't remember the code exactly, but IIRC this is equivalent to setting or
> removing 'tsc' line in the config file.

I'm not aware SETTSC vs SETBSIC configuration outside of those static variables.

  -TT



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