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Merge remote-tracking branch 'origin/fix_for_tx_wait_for_dlsch' into integration_2025_w17 (!3405)

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Fix for NR UE DLSCH decoding barrier in case of no feedback

In !3291 NTN CI RFsim test fails with the UE being stuck. After some
investigation, this seems to be caused by the scenario where there is no
feedback for DLSCH. In that case there is no need to wait for DLSCH
being completed before generating feedback (there is no feedback).
This commit is contained in:
Robert Schmidt
2025-04-28 17:46:11 +02:00
parent d46fb4fc68 799c19b229
commit af7ce8e9b1
3 changed files with 19 additions and 11 deletions
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openair2/LAYER2/NR_MAC_UE/nr_ue_procedures.c
+4 -2
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@@ -931,10 +931,11 @@ static int nr_ue_process_dci_dl_10(NR_UE_MAC_INST_t *mac,
/* PDSCH_TO_HARQ_FEEDBACK_TIME_IND */
// according to TS 38.213 9.2.3
const int ntn_ue_koffset = GET_NTN_UE_K_OFFSET(&mac->ntn_ta, dlsch_pdu->SubcarrierSpacing);
const uint16_t feedback_ti = 1 + dci->pdsch_to_harq_feedback_timing_indicator.val + ntn_ue_koffset;
uint16_t feedback_ti = 0;
if (rnti_type != TYPE_RA_RNTI_ && rnti_type != TYPE_SI_RNTI_) {
if (!get_FeedbackDisabled(mac->sc_info.downlinkHARQ_FeedbackDisabled_r17, dci->harq_pid.val)) {
feedback_ti = 1 + dci->pdsch_to_harq_feedback_timing_indicator.val + ntn_ue_koffset;
AssertFatal(feedback_ti > GET_DURATION_RX_TO_TX(&mac->ntn_ta, dlsch_pdu->SubcarrierSpacing),
"PDSCH to HARQ feedback time (%d) needs to be higher than DURATION_RX_TO_TX (%ld).\n",
feedback_ti,
@@ -1227,9 +1228,10 @@ static int nr_ue_process_dci_dl_11(NR_UE_MAC_INST_t *mac,
/* PDSCH_TO_HARQ_FEEDBACK_TIME_IND */
// according to TS 38.213 Table 9.2.3-1
const int ntn_ue_koffset = GET_NTN_UE_K_OFFSET(&mac->ntn_ta, dlsch_pdu->SubcarrierSpacing);
const uint16_t feedback_ti = pucch_Config->dl_DataToUL_ACK->list.array[dci->pdsch_to_harq_feedback_timing_indicator.val][0] + ntn_ue_koffset;
uint16_t feedback_ti = 0;
if (!get_FeedbackDisabled(mac->sc_info.downlinkHARQ_FeedbackDisabled_r17, dci->harq_pid.val)) {
feedback_ti = pucch_Config->dl_DataToUL_ACK->list.array[dci->pdsch_to_harq_feedback_timing_indicator.val][0] + ntn_ue_koffset;
AssertFatal(feedback_ti > GET_DURATION_RX_TO_TX(&mac->ntn_ta, dlsch_pdu->SubcarrierSpacing),
"PDSCH to HARQ feedback time (%d) needs to be higher than DURATION_RX_TO_TX (%ld). Min feedback time set in config "
"file (min_rxtxtime).\n",