diff options
| -rw-r--r-- | src/tbf_ul.cpp | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/src/tbf_ul.cpp b/src/tbf_ul.cpp index f0d16b51..9390fbbe 100644 --- a/src/tbf_ul.cpp +++ b/src/tbf_ul.cpp @@ -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); |