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NR UE: add support for PDSCH rate matching with NZP CSI-RS

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Currently only ZP CSI-RS is considered in function configure_ratematching_csi,
add support for NZP CSI-RS.
This commit is contained in:
alexjiao
2025-08-09 23:40:53 +08:00
parent 05f9c975ee
commit 0f61fac4a6
1 changed files with 39 additions and 4 deletions
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openair2/LAYER2/NR_MAC_UE/nr_ue_procedures.c
+39 -4
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@@ -284,7 +284,8 @@ static void configure_ratematching_csi(fapi_nr_dl_config_dlsch_pdu_rel15_t *dlsc
int slot,
int mu,
int slots_per_frame,
const NR_PDSCH_Config_t *pdsch_config)
const NR_PDSCH_Config_t *pdsch_config,
NR_CSI_MeasConfig_t *csi_MeasConfig)
{
// only for C-RNTI, MCS-C-RNTI, CS-RNTI (and only C-RNTI is supported for now)
if (rnti_type != TYPE_C_RNTI_)
@@ -319,6 +320,25 @@ static void configure_ratematching_csi(fapi_nr_dl_config_dlsch_pdu_rel15_t *dlsc
}
}
// Handle NZP CSI-RS for rate matching
if (csi_MeasConfig && csi_MeasConfig->nzp_CSI_RS_ResourceToAddModList) {
for (int i = 0; i < csi_MeasConfig->nzp_CSI_RS_ResourceToAddModList->list.count; i++) {
NR_NZP_CSI_RS_Resource_t *nzp_res = csi_MeasConfig->nzp_CSI_RS_ResourceToAddModList->list.array[i];
if (nzp_res->periodicityAndOffset) {
int period, offset;
csi_period_offset(NULL, nzp_res->periodicityAndOffset, &period, &offset);
if ((frame * slots_per_frame + slot - offset) % period != 0)
continue;
AssertFatal(dlsch_pdu->numCsiRsForRateMatching < NFAPI_MAX_NUM_CSI_RATEMATCH, "csiRsForRateMatching out of bounds\n");
fapi_nr_dl_config_csirs_pdu_rel15_t *csi_pdu = &dlsch_pdu->csiRsForRateMatching[dlsch_pdu->numCsiRsForRateMatching];
csi_pdu->csi_type = 1; // NZP CSI-RS
csi_pdu->subcarrier_spacing = mu;
configure_csi_resource_mapping(csi_pdu, &nzp_res->resourceMapping, dlsch_pdu->BWPSize, dlsch_pdu->BWPStart);
dlsch_pdu->numCsiRsForRateMatching++;
}
}
}
for (int i = 0; i < dl_config->number_pdus; i++) {
// This assumes that CSI-RS are scheduled before this moment which is true in current implementation
const fapi_nr_dl_config_request_pdu_t *csi_req = &dl_config->dl_config_list[i];
@@ -764,8 +784,15 @@ static int nr_ue_process_dci_dl_10(NR_UE_MAC_INST_t *mac,
dlsch_pdu->numCsiRsForRateMatching = 0;
int slots_frame = mac->frame_structure.numb_slots_frame;
configure_ratematching_csi(dlsch_pdu, dl_config, rnti_type, frame, slot, dlsch_pdu->SubcarrierSpacing, slots_frame, pdsch_config);
configure_ratematching_csi(dlsch_pdu,
dl_config,
rnti_type,
frame,
slot,
dlsch_pdu->SubcarrierSpacing,
slots_frame,
pdsch_config,
mac->sc_info.csi_MeasConfig);
/* IDENTIFIER_DCI_FORMATS */
/* FREQ_DOM_RESOURCE_ASSIGNMENT_DL */
@@ -1100,7 +1127,15 @@ static int nr_ue_process_dci_dl_11(NR_UE_MAC_INST_t *mac,
nr_rnti_type_t rnti_type = get_rnti_type(mac, dci_ind->rnti);
dlsch_pdu->numCsiRsForRateMatching = 0;
int slots_frame = mac->frame_structure.numb_slots_frame;
configure_ratematching_csi(dlsch_pdu, dl_config, rnti_type, frame, slot, current_DL_BWP->scs, slots_frame, pdsch_Config);
configure_ratematching_csi(dlsch_pdu,
dl_config,
rnti_type,
frame,
slot,
current_DL_BWP->scs,
slots_frame,
pdsch_Config,
mac->sc_info.csi_MeasConfig);
/* IDENTIFIER_DCI_FORMATS */
/* CARRIER_IND */