PDTCH and PTCCH activation

Max msuraev at sysmocom.de
Thu Jul 21 08:50:43 UTC 2016


See https://gerrit.osmocom.org/#/c/556/ - I've removed it and tested
osmo-pcu: as expected gprs works just fine without it. So it got to be
someplace else.

On 07/21/2016 10:38 AM, Max wrote:
> This code is not referenced anywhere.
>
> On 07/21/2016 08:50 AM, Harald Welte wrote:
>> Hi Max,
>>
>> On Wed, Jul 20, 2016 at 06:50:24PM +0200, Max wrote:
>>
>>> Notice that while PDTCH is activated for both UL and DL, the PTCCH is
>>> only activated for DL.
>>>
>>> As far as I've understood continuous TA procedure I've got to have PTCCH
>>> activated in both directions. The problem is that I have troubles
>>> locating the code which triggers the activation above.
>> from osmo-bts/src/osmo-bts-sysmo/oml.c:
>>
>> static const struct sapi_dir pdtch_sapis[] = {
>>         { GsmL1_Sapi_Pdtch,»····GsmL1_Dir_TxDownlink },
>>         { GsmL1_Sapi_Pdtch,»····GsmL1_Dir_RxUplink },
>>         { GsmL1_Sapi_Ptcch,»····GsmL1_Dir_TxDownlink },
>>         { GsmL1_Sapi_Prach,»····GsmL1_Dir_RxUplink },
>> #if 0
>>         { GsmL1_Sapi_Ptcch,»····GsmL1_Dir_RxUplink },
>>         { GsmL1_Sapi_Pacch,»····GsmL1_Dir_TxDownlink },
>> #endif
>>
>> I don't know exactly why it is commented out, probably because itw as
>> simply not used at the time?
>>

-- 
Max Suraev <msuraev at sysmocom.de> http://www.sysmocom.de/
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