Separate nFAPI PDCCH allocation from nFAPI DCI allocation

According to SCF222, a single PDCCH allocation groups DCIs that are
within the same BWP and CORESET. Therefore, if we want to allocate
multiple DCIs, we need to decouple PDCCH allocation and DCI (previously
jointly done in nr_configure_pdcch()), especially to be forward
compatible.

***Note that as of this commit, we would still allocate different PDCCH
PDUs for multiple UEs (which we do not support yet, anyway)***

nr_configure_pdcch(): simply take out DCI allocation.

nr_generate_Msg2(): separately allocate dci_pdu in common RA SS, and
rename DCI payload variable. Also, reorganize the function so that it is
first checked for CCE allocation and messages nFAPI messages are
allocated afterwards.

nr_schedule_ue_spec(): separately allocate dci_pdu in UE-specific SS.
Rename DCI payload variable.

nr_schedule_ulsch(): separately allocate dci_pdu in UE-specific SS.
Rename DCI payload variable.

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_RA.c

@@ -793,27 +793,46 @@ void nr_generate_Msg2(module_id_t module_idP,
   if ((ra->Msg2_frame == frameP) && (ra->Msg2_slot == slotP)) {
 
     nfapi_nr_dl_tti_request_body_t *dl_req = &nr_mac->DL_req[CC_id].dl_tti_request_body;
+    // Checking if the DCI allocation is feasible in current subframe
+    if (dl_req->nPDUs > NFAPI_NR_MAX_DL_TTI_PDUS - 2) {
+      LOG_I(MAC, "[RAPROC] Subframe %d: FAPI DL structure is full, skip scheduling UE %d\n", slotP, RA_rnti);
+      return;
+    }
+
+    uint8_t nr_of_candidates, aggregation_level;
+    find_aggregation_candidates(&aggregation_level, &nr_of_candidates, ss);
+    NR_BWP_Downlink_t *bwp = ra->secondaryCellGroup->spCellConfig->spCellConfigDedicated->downlinkBWP_ToAddModList->list.array[ra->bwp_id - 1];
+    NR_ControlResourceSet_t *coreset = get_coreset(bwp, ss, 0 /* common */);
+    int CCEIndex = allocate_nr_CCEs(nr_mac,
+                                    bwp,
+                                    coreset,
+                                    aggregation_level,
+                                    0, // Y
+                                    0, // m
+                                    nr_of_candidates);
+
+    if (CCEIndex < 0) {
+      LOG_E(MAC, "%s(): cannot find free CCE for RA RNTI %04x!\n", __func__, ra->rnti);
+      return;
+    }
+
     nfapi_nr_pdu_t *tx_req = &nr_mac->TX_req[CC_id].pdu_list[nr_mac->TX_req[CC_id].Number_of_PDUs];
 
     nfapi_nr_dl_tti_request_pdu_t *dl_tti_pdcch_pdu = &dl_req->dl_tti_pdu_list[dl_req->nPDUs];
     memset((void*)dl_tti_pdcch_pdu,0,sizeof(nfapi_nr_dl_tti_request_pdu_t));
     dl_tti_pdcch_pdu->PDUType = NFAPI_NR_DL_TTI_PDCCH_PDU_TYPE;
     dl_tti_pdcch_pdu->PDUSize = (uint8_t)(2+sizeof(nfapi_nr_dl_tti_pdcch_pdu));
+    dl_req->nPDUs += 1;
+    nfapi_nr_dl_tti_pdcch_pdu_rel15_t *pdcch_pdu_rel15 = &dl_tti_pdcch_pdu->pdcch_pdu.pdcch_pdu_rel15;
+    nr_configure_pdcch(pdcch_pdu_rel15, ss, coreset, scc, bwp);
 
-    nfapi_nr_dl_tti_request_pdu_t *dl_tti_pdsch_pdu = &dl_req->dl_tti_pdu_list[dl_req->nPDUs+1];
+    nfapi_nr_dl_tti_request_pdu_t *dl_tti_pdsch_pdu = &dl_req->dl_tti_pdu_list[dl_req->nPDUs];
     memset((void *)dl_tti_pdsch_pdu,0,sizeof(nfapi_nr_dl_tti_request_pdu_t));
     dl_tti_pdsch_pdu->PDUType = NFAPI_NR_DL_TTI_PDSCH_PDU_TYPE;
     dl_tti_pdsch_pdu->PDUSize = (uint8_t)(2+sizeof(nfapi_nr_dl_tti_pdsch_pdu));
-
-    nfapi_nr_dl_tti_pdcch_pdu_rel15_t *pdcch_pdu_rel15 = &dl_tti_pdcch_pdu->pdcch_pdu.pdcch_pdu_rel15;
+    dl_req->nPDUs+=1;
     nfapi_nr_dl_tti_pdsch_pdu_rel15_t *pdsch_pdu_rel15 = &dl_tti_pdsch_pdu->pdsch_pdu.pdsch_pdu_rel15;
 
-    // Checking if the DCI allocation is feasible in current subframe
-    if (dl_req->nPDUs == NFAPI_NR_MAX_DL_TTI_PDUS) {
-      LOG_I(MAC, "[RAPROC] Subframe %d: FAPI DL structure is full, skip scheduling UE %d\n", slotP, RA_rnti);
-      return;
-    }
-
     LOG_I(MAC,"[gNB %d] [RAPROC] CC_id %d Frame %d, slotP %d: Generating RAR DCI, state %d\n", module_idP, CC_id, frameP, slotP, ra->state);
 
     // This code from this point on will not work on initialBWP or CORESET0
@@ -824,7 +843,6 @@ void nr_generate_Msg2(module_id_t module_idP,
                 ra->crnti);
     AssertFatal(ra->secondaryCellGroup->spCellConfig->spCellConfigDedicated->downlinkBWP_ToAddModList->list.count == 1,
       "downlinkBWP_ToAddModList has %d BWP!\n", ra->secondaryCellGroup->spCellConfig->spCellConfigDedicated->downlinkBWP_ToAddModList->list.count);
-    NR_BWP_Downlink_t *bwp = ra->secondaryCellGroup->spCellConfig->spCellConfigDedicated->downlinkBWP_ToAddModList->list.array[ra->bwp_id - 1];
     NR_BWP_Uplink_t *ubwp=ra->secondaryCellGroup->spCellConfig->spCellConfigDedicated->uplinkConfig->uplinkBWP_ToAddModList->list.array[ra->bwp_id-1];
 
     LOG_I(MAC, "[RAPROC] Scheduling common search space DCI type 1 dlBWP BW %d\n", dci10_bw);
@@ -887,49 +905,38 @@ void nr_generate_Msg2(module_id_t module_idP,
     pdsch_pdu_rel15->NrOfSymbols      = NrOfSymbols;
     pdsch_pdu_rel15->dlDmrsSymbPos = fill_dmrs_mask(NULL, scc->dmrs_TypeA_Position, NrOfSymbols);
 
-    dci_pdu_rel15_t dci_pdu_rel15;
-    dci_pdu_rel15.frequency_domain_assignment.val = PRBalloc_to_locationandbandwidth0(pdsch_pdu_rel15->rbSize,
+    /* Fill PDCCH DL DCI PDU */
+    nfapi_nr_dl_dci_pdu_t *dci_pdu = &pdcch_pdu_rel15->dci_pdu[pdcch_pdu_rel15->numDlDci];
+    pdcch_pdu_rel15->numDlDci++;
+    dci_pdu->RNTI = RA_rnti;
+    /* TODO: remove next line */
+    AssertFatal(ss->searchSpaceType->present != NR_SearchSpace__searchSpaceType_PR_ue_Specific,
+                "shouldn't the RA SS be common?\n");
+    dci_pdu->ScramblingId = *scc->physCellId;
+    dci_pdu->ScramblingRNTI = 0;
+    dci_pdu->AggregationLevel = aggregation_level;
+    dci_pdu->CceIndex = CCEIndex;
+    dci_pdu->beta_PDCCH_1_0 = 0;
+    dci_pdu->powerControlOffsetSS = 1;
+
+    dci_pdu_rel15_t dci_payload;
+    dci_payload.frequency_domain_assignment.val = PRBalloc_to_locationandbandwidth0(pdsch_pdu_rel15->rbSize,
 										     pdsch_pdu_rel15->rbStart,dci10_bw);
-    dci_pdu_rel15.time_domain_assignment.val = time_domain_assignment;
-    dci_pdu_rel15.vrb_to_prb_mapping.val = 0;
-    dci_pdu_rel15.mcs = pdsch_pdu_rel15->mcsIndex[0];
-    dci_pdu_rel15.tb_scaling = 0;
+    dci_payload.time_domain_assignment.val = time_domain_assignment;
+    dci_payload.vrb_to_prb_mapping.val = 0;
+    dci_payload.mcs = pdsch_pdu_rel15->mcsIndex[0];
+    dci_payload.tb_scaling = 0;
 
     LOG_I(MAC,
           "[RAPROC] DCI type 1 payload: freq_alloc %d (%d,%d,%d), time_alloc %d, vrb to prb %d, mcs %d tb_scaling %d \n",
-          dci_pdu_rel15.frequency_domain_assignment.val,
+          dci_payload.frequency_domain_assignment.val,
           pdsch_pdu_rel15->rbStart,
           pdsch_pdu_rel15->rbSize,
           dci10_bw,
-          dci_pdu_rel15.time_domain_assignment.val,
-          dci_pdu_rel15.vrb_to_prb_mapping.val,
-          dci_pdu_rel15.mcs,
-          dci_pdu_rel15.tb_scaling);
-
-    uint8_t nr_of_candidates, aggregation_level;
-    find_aggregation_candidates(&aggregation_level, &nr_of_candidates, ss);
-    NR_ControlResourceSet_t *coreset = get_coreset(bwp, ss, 0 /* common */);
-    int CCEIndex = allocate_nr_CCEs(nr_mac,
-                                    bwp,
-                                    coreset,
-                                    aggregation_level,
-                                    0, // Y
-                                    0, // m
-                                    nr_of_candidates);
-
-    if (CCEIndex < 0) {
-      LOG_E(MAC, "%s(): cannot find free CCE for RA RNTI %04x!\n", __func__, ra->rnti);
-      return;
-    }
-    nr_configure_pdcch(nr_mac,
-                       pdcch_pdu_rel15,
-                       RA_rnti,
-                       ss,
-                       coreset,
-                       scc,
-                       bwp,
-                       aggregation_level,
-                       CCEIndex);
+          dci_payload.time_domain_assignment.val,
+          dci_payload.vrb_to_prb_mapping.val,
+          dci_payload.mcs,
+          dci_payload.tb_scaling);
 
     LOG_I(MAC, "Frame %d: Subframe %d : Adding common DL DCI for RA_RNTI %x\n", frameP, slotP, RA_rnti);
 
@@ -945,18 +952,15 @@ void nr_generate_Msg2(module_id_t module_idP,
           pdcch_pdu_rel15->StartSymbolIndex,
           pdcch_pdu_rel15->DurationSymbols);
 
-    // nr_configure_pdcch() increased numDlDci, so we use numDlDci - 1
     fill_dci_pdu_rel15(scc,
                        ra->secondaryCellGroup,
-                       &pdcch_pdu_rel15->dci_pdu[pdcch_pdu_rel15->numDlDci - 1],
-                       &dci_pdu_rel15,
+                       dci_pdu,
+                       &dci_payload,
                        dci_format,
                        rnti_type,
                        dci10_bw,
                        ra->bwp_id);
 
-    dl_req->nPDUs+=2;
-
     // Program UL processing for Msg3
     nr_get_Msg3alloc(module_idP, CC_id, scc, ubwp, slotP, frameP, ra);
     LOG_I(MAC, "Frame %d, Subframe %d: Setting Msg3 reception for Frame %d Subframe %d\n", frameP, slotP, ra->Msg3_frame, ra->Msg3_slot);
@@ -965,7 +969,7 @@ void nr_generate_Msg2(module_id_t module_idP,
     LOG_I(MAC,"[gNB %d][RAPROC] Frame %d, Subframe %d: RA state %d\n", module_idP, frameP, slotP, ra->state);
 
     x_Overhead = 0;
-    nr_get_tbs_dl(&dl_tti_pdsch_pdu->pdsch_pdu, x_Overhead, pdsch_pdu_rel15->numDmrsCdmGrpsNoData, dci_pdu_rel15.tb_scaling);
+    nr_get_tbs_dl(&dl_tti_pdsch_pdu->pdsch_pdu, x_Overhead, pdsch_pdu_rel15->numDmrsCdmGrpsNoData, dci_payload.tb_scaling);
 
     // DL TX request
     tx_req->PDU_length = pdsch_pdu_rel15->TBSize[0];

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_bch.c

@@ -331,13 +331,19 @@ void nr_fill_nfapi_dl_sib1_pdu(int Mod_idP,
   memset((void*)dl_tti_pdcch_pdu,0,sizeof(nfapi_nr_dl_tti_request_pdu_t));
   dl_tti_pdcch_pdu->PDUType = NFAPI_NR_DL_TTI_PDCCH_PDU_TYPE;
   dl_tti_pdcch_pdu->PDUSize = (uint8_t)(2+sizeof(nfapi_nr_dl_tti_pdcch_pdu));
+  dl_req->nPDUs += 1;
+  nfapi_nr_dl_tti_pdcch_pdu_rel15_t *pdcch_pdu_rel15 = &dl_tti_pdcch_pdu->pdcch_pdu.pdcch_pdu_rel15;
+  nr_configure_pdcch(pdcch_pdu_rel15,
+                     gNB_mac->sched_ctrlCommon->search_space,
+                     gNB_mac->sched_ctrlCommon->coreset,
+                     scc,
+                     bwp);
 
-  nfapi_nr_dl_tti_request_pdu_t *dl_tti_pdsch_pdu = &dl_req->dl_tti_pdu_list[dl_req->nPDUs+1];
+  nfapi_nr_dl_tti_request_pdu_t *dl_tti_pdsch_pdu = &dl_req->dl_tti_pdu_list[dl_req->nPDUs];
   memset((void*)dl_tti_pdsch_pdu,0,sizeof(nfapi_nr_dl_tti_request_pdu_t));
   dl_tti_pdsch_pdu->PDUType = NFAPI_NR_DL_TTI_PDSCH_PDU_TYPE;
   dl_tti_pdsch_pdu->PDUSize = (uint8_t)(2+sizeof(nfapi_nr_dl_tti_pdsch_pdu));
-
-  nfapi_nr_dl_tti_pdcch_pdu_rel15_t *pdcch_pdu_rel15 = &dl_tti_pdcch_pdu->pdcch_pdu.pdcch_pdu_rel15;
+  dl_req->nPDUs += 1;
   nfapi_nr_dl_tti_pdsch_pdu_rel15_t *pdsch_pdu_rel15 = &dl_tti_pdsch_pdu->pdsch_pdu.pdsch_pdu_rel15;
 
   pdcch_pdu_rel15->CoreSetType = NFAPI_NR_CSET_CONFIG_MIB_SIB1;
@@ -385,36 +391,38 @@ void nr_fill_nfapi_dl_sib1_pdu(int Mod_idP,
 
   LOG_D(MAC,"dlDmrsSymbPos = 0x%x\n", pdsch_pdu_rel15->dlDmrsSymbPos);
 
-  dci_pdu_rel15_t dci_pdu_rel15;
-  memset(&dci_pdu_rel15, 0, sizeof(dci_pdu_rel15_t));
+  /* Fill PDCCH DL DCI PDU */
+  nfapi_nr_dl_dci_pdu_t *dci_pdu = &pdcch_pdu_rel15->dci_pdu[pdcch_pdu_rel15->numDlDci];
+  pdcch_pdu_rel15->numDlDci++;
+  dci_pdu->RNTI = SI_RNTI;
+  dci_pdu->ScramblingId = *scc->physCellId;
+  dci_pdu->ScramblingRNTI = 0;
+  dci_pdu->AggregationLevel = gNB_mac->sched_ctrlCommon->aggregation_level;
+  dci_pdu->CceIndex = gNB_mac->sched_ctrlCommon->cce_index;
+  dci_pdu->beta_PDCCH_1_0 = 0;
+  dci_pdu->powerControlOffsetSS = 1;
 
-  dci_pdu_rel15.bwp_indicator.val = gNB_mac->sched_ctrlCommon->active_bwp->bwp_Id;
+  /* DCI payload */
+  dci_pdu_rel15_t dci_payload;
+  memset(&dci_payload, 0, sizeof(dci_pdu_rel15_t));
+
+  dci_payload.bwp_indicator.val = gNB_mac->sched_ctrlCommon->active_bwp->bwp_Id;
 
   // frequency domain assignment
-  dci_pdu_rel15.frequency_domain_assignment.val = PRBalloc_to_locationandbandwidth0(
+  dci_payload.frequency_domain_assignment.val = PRBalloc_to_locationandbandwidth0(
       pdsch_pdu_rel15->rbSize, pdsch_pdu_rel15->rbStart, gNB_mac->type0_PDCCH_CSS_config.num_rbs);
 
-  dci_pdu_rel15.time_domain_assignment.val = gNB_mac->sched_ctrlCommon->time_domain_allocation;
-  dci_pdu_rel15.mcs = gNB_mac->sched_ctrlCommon->mcs;
-  dci_pdu_rel15.rv = pdsch_pdu_rel15->rvIndex[0];
-  dci_pdu_rel15.harq_pid = 0;
-  dci_pdu_rel15.ndi = 0;
-  dci_pdu_rel15.dai[0].val = 0;
-  dci_pdu_rel15.tpc = 0; // table 7.2.1-1 in 38.213
-  dci_pdu_rel15.pucch_resource_indicator = 0;
-  dci_pdu_rel15.pdsch_to_harq_feedback_timing_indicator.val = 0;
-  dci_pdu_rel15.antenna_ports.val = 0;
-  dci_pdu_rel15.dmrs_sequence_initialization.val = pdsch_pdu_rel15->SCID;
-
-  nr_configure_pdcch(gNB_mac,
-                     pdcch_pdu_rel15,
-                     SI_RNTI,
-                     gNB_mac->sched_ctrlCommon->search_space,
-                     gNB_mac->sched_ctrlCommon->coreset,
-                     scc,
-                     bwp,
-                     gNB_mac->sched_ctrlCommon->aggregation_level,
-                     gNB_mac->sched_ctrlCommon->cce_index);
+  dci_payload.time_domain_assignment.val = gNB_mac->sched_ctrlCommon->time_domain_allocation;
+  dci_payload.mcs = gNB_mac->sched_ctrlCommon->mcs;
+  dci_payload.rv = pdsch_pdu_rel15->rvIndex[0];
+  dci_payload.harq_pid = 0;
+  dci_payload.ndi = 0;
+  dci_payload.dai[0].val = 0;
+  dci_payload.tpc = 0; // table 7.2.1-1 in 38.213
+  dci_payload.pucch_resource_indicator = 0;
+  dci_payload.pdsch_to_harq_feedback_timing_indicator.val = 0;
+  dci_payload.antenna_ports.val = 0;
+  dci_payload.dmrs_sequence_initialization.val = pdsch_pdu_rel15->SCID;
 
   int dci_format = NR_DL_DCI_FORMAT_1_0;
   int rnti_type = NR_RNTI_SI;
@@ -422,7 +430,7 @@ void nr_fill_nfapi_dl_sib1_pdu(int Mod_idP,
   fill_dci_pdu_rel15(scc,
                      secondaryCellGroup,
                      &pdcch_pdu_rel15->dci_pdu[pdcch_pdu_rel15->numDlDci - 1],
-                     &dci_pdu_rel15,
+                     &dci_payload,
                      dci_format,
                      rnti_type,
                      pdsch_pdu_rel15->BWPSize,

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_dlsch.c

@@ -630,16 +630,15 @@ void nr_schedule_ue_spec(module_id_t module_id,
     AssertFatal(bwp->bwp_Dedicated->pdcch_Config->choice.setup->searchSpacesToAddModList->list.count > 0,
                 "searchSPacesToAddModList is empty\n");
 
-
     nfapi_nr_dl_tti_request_body_t *dl_req = &gNB_mac->DL_req[CC_id].dl_tti_request_body;
 
-    /* TODO: can be moved down? */
     nfapi_nr_dl_tti_request_pdu_t *dl_tti_pdcch_pdu = &dl_req->dl_tti_pdu_list[dl_req->nPDUs];
     memset(dl_tti_pdcch_pdu, 0, sizeof(nfapi_nr_dl_tti_request_pdu_t));
     dl_tti_pdcch_pdu->PDUType = NFAPI_NR_DL_TTI_PDCCH_PDU_TYPE;
     dl_tti_pdcch_pdu->PDUSize = (uint8_t)(2+sizeof(nfapi_nr_dl_tti_pdcch_pdu));
     dl_req->nPDUs += 1;
     nfapi_nr_dl_tti_pdcch_pdu_rel15_t *pdcch_pdu = &dl_tti_pdcch_pdu->pdcch_pdu.pdcch_pdu_rel15;
+    nr_configure_pdcch(pdcch_pdu, sched_ctrl->search_space, sched_ctrl->coreset, scc, bwp);
 
     nfapi_nr_dl_tti_request_pdu_t *dl_tti_pdsch_pdu = &dl_req->dl_tti_pdu_list[dl_req->nPDUs];
     memset(dl_tti_pdsch_pdu, 0, sizeof(nfapi_nr_dl_tti_request_pdu_t));
@@ -714,69 +713,75 @@ void nr_schedule_ue_spec(module_id_t module_id,
         pdsch_pdu->pduBitmap |= 0x1; // Bit 0: pdschPtrs - Indicates PTRS included (FR2)
     }
 
-    dci_pdu_rel15_t dci_pdu;
-    memset(&dci_pdu, 0, sizeof(dci_pdu_rel15_t));
+    /* Fill PDCCH DL DCI PDU */
+    nfapi_nr_dl_dci_pdu_t *dci_pdu = &pdcch_pdu->dci_pdu[pdcch_pdu->numDlDci];
+    pdcch_pdu->numDlDci++;
+    dci_pdu->RNTI = rnti;
+    if (sched_ctrl->coreset->pdcch_DMRS_ScramblingID &&
+        sched_ctrl->search_space->searchSpaceType->present == NR_SearchSpace__searchSpaceType_PR_ue_Specific) {
+      dci_pdu->ScramblingId = *sched_ctrl->coreset->pdcch_DMRS_ScramblingID;
+      dci_pdu->ScramblingRNTI = rnti;
+    } else {
+      dci_pdu->ScramblingId = *scc->physCellId;
+      dci_pdu->ScramblingRNTI = 0;
+    }
+    dci_pdu->AggregationLevel = sched_ctrl->aggregation_level;
+    dci_pdu->CceIndex = sched_ctrl->cce_index;
+    dci_pdu->beta_PDCCH_1_0 = 0;
+    dci_pdu->powerControlOffsetSS = 1;
 
+    /* DCI payload */
+    dci_pdu_rel15_t dci_payload;
+    memset(&dci_payload, 0, sizeof(dci_pdu_rel15_t));
     // bwp indicator
     const int n_dl_bwp = UE_info->secondaryCellGroup[UE_id]->spCellConfig->spCellConfigDedicated->downlinkBWP_ToAddModList->list.count;
       AssertFatal(n_dl_bwp == 1,
           "downlinkBWP_ToAddModList has %d BWP!\n",
           n_dl_bwp);
     // as per table 7.3.1.1.2-1 in 38.212
-    dci_pdu.bwp_indicator.val = n_dl_bwp < 4 ? bwp->bwp_Id : bwp->bwp_Id - 1;
+    dci_payload.bwp_indicator.val = n_dl_bwp < 4 ? bwp->bwp_Id : bwp->bwp_Id - 1;
     AssertFatal(bwp->bwp_Dedicated->pdsch_Config->choice.setup->resourceAllocation == NR_PDSCH_Config__resourceAllocation_resourceAllocationType1,
                 "Only frequency resource allocation type 1 is currently supported\n");
-    dci_pdu.frequency_domain_assignment.val =
+    dci_payload.frequency_domain_assignment.val =
         PRBalloc_to_locationandbandwidth0(
             pdsch_pdu->rbSize,
             pdsch_pdu->rbStart,
             pdsch_pdu->BWPSize);
-    dci_pdu.time_domain_assignment.val = sched_ctrl->time_domain_allocation;
-    dci_pdu.mcs = sched_ctrl->mcs;
-    dci_pdu.rv = pdsch_pdu->rvIndex[0];
-    dci_pdu.harq_pid = current_harq_pid;
-    dci_pdu.ndi = harq->ndi;
-    dci_pdu.dai[0].val = (pucch->dai_c-1)&3;
-    dci_pdu.tpc = sched_ctrl->tpc1; // TPC for PUCCH: table 7.2.1-1 in 38.213
-    dci_pdu.pucch_resource_indicator = pucch->resource_indicator;
-    dci_pdu.pdsch_to_harq_feedback_timing_indicator.val = pucch->timing_indicator; // PDSCH to HARQ TI
-    dci_pdu.antenna_ports.val = 0;  // nb of cdm groups w/o data 1 and dmrs port 0
-    dci_pdu.dmrs_sequence_initialization.val = pdsch_pdu->SCID;
+    dci_payload.time_domain_assignment.val = sched_ctrl->time_domain_allocation;
+    dci_payload.mcs = sched_ctrl->mcs;
+    dci_payload.rv = pdsch_pdu->rvIndex[0];
+    dci_payload.harq_pid = current_harq_pid;
+    dci_payload.ndi = harq->ndi;
+    dci_payload.dai[0].val = (pucch->dai_c-1)&3;
+    dci_payload.tpc = sched_ctrl->tpc1; // TPC for PUCCH: table 7.2.1-1 in 38.213
+    dci_payload.pucch_resource_indicator = pucch->resource_indicator;
+    dci_payload.pdsch_to_harq_feedback_timing_indicator.val = pucch->timing_indicator; // PDSCH to HARQ TI
+    dci_payload.antenna_ports.val = 0;  // nb of cdm groups w/o data 1 and dmrs port 0
+    dci_payload.dmrs_sequence_initialization.val = pdsch_pdu->SCID;
     LOG_D(MAC,
           "%4d.%2d DCI type 1 payload: freq_alloc %d (%d,%d,%d), "
           "time_alloc %d, vrb to prb %d, mcs %d tb_scaling %d ndi %d rv %d\n",
           frame,
           slot,
-          dci_pdu.frequency_domain_assignment.val,
+          dci_payload.frequency_domain_assignment.val,
           pdsch_pdu->rbStart,
           pdsch_pdu->rbSize,
           pdsch_pdu->BWPSize,
-          dci_pdu.time_domain_assignment.val,
-          dci_pdu.vrb_to_prb_mapping.val,
-          dci_pdu.mcs,
-          dci_pdu.tb_scaling,
-          dci_pdu.ndi,
-          dci_pdu.rv);
-
-    nr_configure_pdcch(gNB_mac,
-                       pdcch_pdu,
-                       rnti,
-                       sched_ctrl->search_space,
-                       sched_ctrl->coreset,
-                       scc,
-                       bwp,
-                       sched_ctrl->aggregation_level,
-                       sched_ctrl->cce_index);
+          dci_payload.time_domain_assignment.val,
+          dci_payload.vrb_to_prb_mapping.val,
+          dci_payload.mcs,
+          dci_payload.tb_scaling,
+          dci_payload.ndi,
+          dci_payload.rv);
 
     const long f = sched_ctrl->search_space->searchSpaceType->choice.ue_Specific->dci_Formats;
     const int dci_format = f ? NR_DL_DCI_FORMAT_1_1 : NR_DL_DCI_FORMAT_1_0;
     const int rnti_type = NR_RNTI_C;
 
-    // nr_configure_pdcch() increased numDlDci, so we use numDlDci - 1
     fill_dci_pdu_rel15(scc,
                        UE_info->secondaryCellGroup[UE_id],
-                       &pdcch_pdu->dci_pdu[pdcch_pdu->numDlDci - 1],
-                       &dci_pdu,
+                       dci_pdu,
+                       &dci_payload,
                        dci_format,
                        rnti_type,
                        pdsch_pdu->BWPSize,

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_primitives.c

@@ -554,15 +554,12 @@ void config_uldci(const NR_BWP_Uplink_t *ubwp,
         dci_pdu_rel15->rv);
 }
 
-void nr_configure_pdcch(gNB_MAC_INST *nr_mac,
-                        nfapi_nr_dl_tti_pdcch_pdu_rel15_t *pdcch_pdu,
-                        uint16_t rnti,
+void nr_configure_pdcch(nfapi_nr_dl_tti_pdcch_pdu_rel15_t *pdcch_pdu,
                         NR_SearchSpace_t *ss,
                         NR_ControlResourceSet_t *coreset,
                         NR_ServingCellConfigCommon_t *scc,
-                        NR_BWP_Downlink_t *bwp,
-                        uint8_t aggregation_level,
-                        int CCEIndex) {
+                        NR_BWP_Downlink_t *bwp)
+{
   if (bwp) { // This is not the InitialBWP
     pdcch_pdu->BWPSize  = NRRIV2BW(bwp->bwp_Common->genericParameters.locationAndBandwidth,275);
     pdcch_pdu->BWPStart = NRRIV2PRBOFFSET(bwp->bwp_Common->genericParameters.locationAndBandwidth,275);
@@ -617,27 +614,6 @@ void nr_configure_pdcch(gNB_MAC_INST *nr_mac,
 
     //precoderGranularity
     pdcch_pdu->precoderGranularity = coreset->precoderGranularity;
-
-    pdcch_pdu->dci_pdu[pdcch_pdu->numDlDci].RNTI = rnti;
-
-    if (coreset->pdcch_DMRS_ScramblingID != NULL &&
-        ss->searchSpaceType->present == NR_SearchSpace__searchSpaceType_PR_ue_Specific) {
-      pdcch_pdu->dci_pdu[pdcch_pdu->numDlDci].ScramblingId = *coreset->pdcch_DMRS_ScramblingID;
-      pdcch_pdu->dci_pdu[pdcch_pdu->numDlDci].ScramblingRNTI = rnti;
-    }
-    else {
-      pdcch_pdu->dci_pdu[pdcch_pdu->numDlDci].ScramblingId = *scc->physCellId;
-      pdcch_pdu->dci_pdu[pdcch_pdu->numDlDci].ScramblingRNTI = 0;
-    }
-
-    pdcch_pdu->dci_pdu[pdcch_pdu->numDlDci].AggregationLevel = aggregation_level;
-    pdcch_pdu->dci_pdu[pdcch_pdu->numDlDci].CceIndex = CCEIndex;
-
-    if (ss->searchSpaceType->choice.ue_Specific->dci_Formats==NR_SearchSpace__searchSpaceType__ue_Specific__dci_Formats_formats0_0_And_1_0)
-      pdcch_pdu->dci_pdu[pdcch_pdu->numDlDci].beta_PDCCH_1_0 = 0;
-
-    pdcch_pdu->dci_pdu[pdcch_pdu->numDlDci].powerControlOffsetSS = 1;
-    pdcch_pdu->numDlDci++;
   }
   else { // this is for InitialBWP
     AssertFatal(1==0,"Fill in InitialBWP PDCCH configuration\n");

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_ulsch.c

@@ -768,28 +768,36 @@ void nr_schedule_ulsch(module_id_t module_id,
     memset(ul_dci_request_pdu, 0, sizeof(nfapi_nr_ul_dci_request_pdus_t));
     ul_dci_request_pdu->PDUType = NFAPI_NR_DL_TTI_PDCCH_PDU_TYPE;
     ul_dci_request_pdu->PDUSize = (uint8_t)(2+sizeof(nfapi_nr_dl_tti_pdcch_pdu));
-    nfapi_nr_dl_tti_pdcch_pdu_rel15_t *pdcch_pdu_rel15 = &ul_dci_request_pdu->pdcch_pdu.pdcch_pdu_rel15;
+    nfapi_nr_dl_tti_pdcch_pdu_rel15_t *pdcch_pdu = &ul_dci_request_pdu->pdcch_pdu.pdcch_pdu_rel15;
     ul_dci_req->numPdus += 1;
+    nr_configure_pdcch(pdcch_pdu, sched_ctrl->search_space, sched_ctrl->coreset, scc, sched_ctrl->active_bwp);
 
     LOG_D(MAC,"Configuring ULDCI/PDCCH in %d.%d\n", frame,slot);
 
-    nr_configure_pdcch(RC.nrmac[0],
-                       pdcch_pdu_rel15,
-                       rnti,
-                       sched_ctrl->search_space,
-                       sched_ctrl->coreset,
-                       scc,
-                       sched_ctrl->active_bwp,
-                       sched_ctrl->aggregation_level,
-                       sched_ctrl->cce_index);
+    /* Fill PDCCH DL DCI PDU */
+    nfapi_nr_dl_dci_pdu_t *dci_pdu = &pdcch_pdu->dci_pdu[pdcch_pdu->numDlDci];
+    pdcch_pdu->numDlDci++;
+    dci_pdu->RNTI = rnti;
+    if (sched_ctrl->coreset->pdcch_DMRS_ScramblingID &&
+        sched_ctrl->search_space->searchSpaceType->present == NR_SearchSpace__searchSpaceType_PR_ue_Specific) {
+      dci_pdu->ScramblingId = *sched_ctrl->coreset->pdcch_DMRS_ScramblingID;
+      dci_pdu->ScramblingRNTI = rnti;
+    } else {
+      dci_pdu->ScramblingId = *scc->physCellId;
+      dci_pdu->ScramblingRNTI = 0;
+    }
+    dci_pdu->AggregationLevel = sched_ctrl->aggregation_level;
+    dci_pdu->CceIndex = sched_ctrl->cce_index;
+    dci_pdu->beta_PDCCH_1_0 = 0;
+    dci_pdu->powerControlOffsetSS = 1;
 
-    dci_pdu_rel15_t dci_pdu_rel15;
-    memset(&dci_pdu_rel15, 0, sizeof(dci_pdu_rel15));
+    dci_pdu_rel15_t uldci_payload;
+    memset(&uldci_payload, 0, sizeof(uldci_payload));
     NR_CellGroupConfig_t *secondaryCellGroup = UE_info->secondaryCellGroup[UE_id];
     const int n_ubwp = secondaryCellGroup->spCellConfig->spCellConfigDedicated->uplinkConfig->uplinkBWP_ToAddModList->list.count;
     config_uldci(sched_ctrl->active_ubwp,
                  pusch_pdu,
-                 &dci_pdu_rel15,
+                 &uldci_payload,
                  ps->dci_format,
                  ps->time_domain_allocation,
                  UE_info->UE_sched_ctrl[UE_id].tpc0,
@@ -797,8 +805,8 @@ void nr_schedule_ulsch(module_id_t module_id,
                  sched_ctrl->active_bwp->bwp_Id);
     fill_dci_pdu_rel15(scc,
                        secondaryCellGroup,
-                       &pdcch_pdu_rel15->dci_pdu[pdcch_pdu_rel15->numDlDci - 1],
-                       &dci_pdu_rel15,
+                       dci_pdu,
+                       &uldci_payload,
                        ps->dci_format,
                        rnti_types[0],
                        pusch_pdu->bwp_size,

openair2/LAYER2/NR_MAC_gNB/mac_proto.h

@@ -242,15 +242,11 @@ void find_search_space(int ss_type,
                        NR_BWP_Downlink_t *bwp,
                        NR_SearchSpace_t *ss);
 
-void nr_configure_pdcch(gNB_MAC_INST *nr_mac,
-                        nfapi_nr_dl_tti_pdcch_pdu_rel15_t *pdcch_pdu,
-                        uint16_t rnti,
+void nr_configure_pdcch(nfapi_nr_dl_tti_pdcch_pdu_rel15_t *pdcch_pdu,
                         NR_SearchSpace_t *ss,
                         NR_ControlResourceSet_t *coreset,
                         NR_ServingCellConfigCommon_t *scc,
-                        NR_BWP_Downlink_t *bwp,
-                        uint8_t aggregation_level,
-                        int CCEIndex);
+                        NR_BWP_Downlink_t *bwp);
 
 void fill_dci_pdu_rel15(const NR_ServingCellConfigCommon_t *scc,
                         const NR_CellGroupConfig_t *secondaryCellGroup,