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tbf_ul: Improve documentation of tbf_alloc_ul_pacch() 

Change-Id: I59493788b4a54610a70f3eb4c31fd05f6e39e63d
This commit is contained in:
Pau Espin 2021-11-02 18:46:40 +01:00 committed by laforge
parent 10b29153b7
commit cc77eed9d9
1 changed files with 7 additions and 1 deletions
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8
src/tbf_ul.cpp
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@ -151,7 +151,12 @@ struct gprs_rlcmac_ul_tbf *tbf_alloc_ul_tbf(struct gprs_rlcmac_bts *bts, GprsMs
return tbf;
}
/* Alloc a UL TBF to be assigned over PACCH */
/* Alloc a UL TBF to be assigned over PACCH. Called when an MS requests to
* create a new UL TBF during the end of life of a previous UL TBF (or an SBA).
* In summary, this TBF is allocated as a consequence of receiving a "Pkt
* Resource Req" or "Pkt Ctrl Ack" from the MS.
* See TS 44.060 9.3.2.4.2 "Non-extended uplink TBF mode".
*/
gprs_rlcmac_ul_tbf *tbf_alloc_ul_pacch(struct gprs_rlcmac_bts *bts, GprsMs *ms, int8_t use_trx)
{
struct gprs_rlcmac_ul_tbf *tbf;
@ -162,6 +167,7 @@ gprs_rlcmac_ul_tbf *tbf_alloc_ul_pacch(struct gprs_rlcmac_bts *bts, GprsMs *ms,
/* Caller will most probably send a Imm Ass Reject after return */
return NULL;
}
/* Contention resolution is considered to be done since TLLI is known in MS: */
tbf->m_contention_resolution_done = 1;
osmo_fsm_inst_dispatch(tbf->state_fsm.fi, TBF_EV_ASSIGN_ADD_PACCH, NULL);