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Fix RA-RNTI for long prach formats

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Sakthivel Velumani
2025-03-20 11:12:00 -04:00
parent bab16b7e15
commit e775b9ce9a
1 changed files with 5 additions and 2 deletions
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openair2/LAYER2/NR_MAC_UE/nr_ra_procedures.c
+5 -2
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@@ -624,9 +624,12 @@ static void ra_preamble_msga_transmission(RA_config_t *ra, int scs)
prach_resources->ra_preamble_rx_target_power = get_ra_preamble_rx_target_power(ra, scs);
ra->ra_rnti = nr_get_ra_rnti(ra->sched_ro_info.start_symbol, ra->sched_ro_info.slot, ra->sched_ro_info.fdm, 0);
// 3GPP TS 38.321 Section 5.1.3 says t_id for RA-RNTI depends on mu as specified in clause 5.3.2 in TS 38.211
// so mu = 0 for prach format < 4.
const int slot = ((ra->sched_ro_info.format & 0xff) < 4) ? ra->sched_ro_info.slot >> scs : ra->sched_ro_info.slot;
ra->ra_rnti = nr_get_ra_rnti(ra->sched_ro_info.start_symbol, slot, ra->sched_ro_info.fdm, 0);
if (ra->ra_type == RA_2_STEP)
ra->MsgB_rnti = nr_get_MsgB_rnti(ra->sched_ro_info.start_symbol, ra->sched_ro_info.slot, ra->sched_ro_info.fdm, 0);
ra->MsgB_rnti = nr_get_MsgB_rnti(ra->sched_ro_info.start_symbol, slot, ra->sched_ro_info.fdm, 0);
}
// 38.321 Section 5.1.2 Random Access Resource selection