Group PDCCH PDU per CC/BWP/CORESET in RA, and reuse in DLSCH

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler.c

@@ -89,6 +89,7 @@ void clear_nr_nfapi_information(gNB_MAC_INST * gNB,
   const int num_slots = nr_slots_per_frame[*scc->ssbSubcarrierSpacing];
 
   nfapi_nr_dl_tti_request_t    *DL_req = &gNB->DL_req[0];
+  nfapi_nr_dl_tti_pdcch_pdu_rel15_t ***pdcch = (nfapi_nr_dl_tti_pdcch_pdu_rel15_t ***)gNB->pdcch_pdu_idx[CC_idP];
   nfapi_nr_ul_tti_request_t    *future_ul_tti_req =
       &gNB->UL_tti_req_ahead[CC_idP][(slotP + num_slots - 1) % num_slots];
   nfapi_nr_ul_dci_request_t    *UL_dci_req = &gNB->UL_dci_req[0];
@@ -103,6 +104,7 @@ void clear_nr_nfapi_information(gNB_MAC_INST * gNB,
     DL_req[CC_idP].dl_tti_request_body.nPDUs             = 0;
     DL_req[CC_idP].dl_tti_request_body.nGroup            = 0;
     //DL_req[CC_idP].dl_tti_request_body.transmission_power_pcfich           = 6000;
+    memset(pdcch, 0, sizeof(**pdcch) * MAX_NUM_BWP * MAX_NUM_CORESET);
 
     UL_dci_req[CC_idP].SFN                         = frameP;
     UL_dci_req[CC_idP].Slot                        = slotP;

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_RA.c

@@ -818,16 +818,22 @@ void nr_generate_Msg2(module_id_t module_idP,
 
     nfapi_nr_pdu_t *tx_req = &nr_mac->TX_req[CC_id].pdu_list[nr_mac->TX_req[CC_id].Number_of_PDUs];
 
-    /* NOTE: below we assume that there are not multiple concurrent RAs. If
-     * this was the case, we would need to allocate all DCIs within the same
-     * PDCCH, i.e., the same RA coreset */
-    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);
+    /* look up the PDCCH PDU for this CC, BWP, and CORESET. If it does not
+     * exist, create it. This is especially important if we have multiple RAs,
+     * and the DLSCH has to reuse them, so we need to mark them */
+    const int bwpid = bwp->bwp_Id;
+    const int coresetid = coreset->controlResourceSetId;
+    nfapi_nr_dl_tti_pdcch_pdu_rel15_t *pdcch_pdu_rel15 = nr_mac->pdcch_pdu_idx[CC_id][bwpid][coresetid];
+    if (!pdcch_pdu_rel15) {
+      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;
+      pdcch_pdu_rel15 = &dl_tti_pdcch_pdu->pdcch_pdu.pdcch_pdu_rel15;
+      nr_configure_pdcch(pdcch_pdu_rel15, ss, coreset, scc, bwp);
+      nr_mac->pdcch_pdu_idx[CC_id][bwpid][coresetid] = pdcch_pdu_rel15;
+    }
 
     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));

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_dlsch.c

@@ -552,10 +552,6 @@ void nr_schedule_ue_spec(module_id_t module_id,
   NR_UE_info_t *UE_info = &gNB_mac->UE_info;
 
   nfapi_nr_dl_tti_request_body_t *dl_req = &gNB_mac->DL_req[CC_id].dl_tti_request_body;
-  /* a PDCCH PDU groups DCIs per BWP and CORESET. Save a pointer to each
-   * allocated PDCCH so we can easily allocate UE's DCIs independent of any
-   * CORESET order */
-  nfapi_nr_dl_tti_pdcch_pdu_rel15_t *pdcch_pdu_bwp_coreset[MAX_NUM_BWP][MAX_NUM_CORESET] = {0};
 
   NR_UE_list_t *UE_list = &UE_info->list;
   for (int UE_id = UE_list->head; UE_id >= 0; UE_id = UE_list->next[UE_id]) {
@@ -636,11 +632,11 @@ 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");
 
-    /* look up the PDCCH PDU for this BWP and CORESET. If it does not exist,
-     * create it */
+    /* look up the PDCCH PDU for this CC, BWP, and CORESET. If it does not
+     * exist, create it */
     const int bwpid = sched_ctrl->active_bwp->bwp_Id;
     const int coresetid = sched_ctrl->coreset->controlResourceSetId;
-    nfapi_nr_dl_tti_pdcch_pdu_rel15_t *pdcch_pdu = pdcch_pdu_bwp_coreset[bwpid][coresetid];
+    nfapi_nr_dl_tti_pdcch_pdu_rel15_t *pdcch_pdu = gNB_mac->pdcch_pdu_idx[CC_id][bwpid][coresetid];
     if (!pdcch_pdu) {
       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));
@@ -649,7 +645,7 @@ void nr_schedule_ue_spec(module_id_t module_id,
       dl_req->nPDUs += 1;
       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);
-      pdcch_pdu_bwp_coreset[bwpid][coresetid] = pdcch_pdu;
+      gNB_mac->pdcch_pdu_idx[CC_id][bwpid][coresetid] = pdcch_pdu;
     }
 
     nfapi_nr_dl_tti_request_pdu_t *dl_tti_pdsch_pdu = &dl_req->dl_tti_pdu_list[dl_req->nPDUs];

openair2/LAYER2/NR_MAC_gNB/nr_mac_gNB.h

@@ -511,6 +511,10 @@ typedef struct gNB_MAC_INST_s {
   nfapi_nr_config_request_scf_t     config[NFAPI_CC_MAX];
   /// NFAPI DL Config Request Structure
   nfapi_nr_dl_tti_request_t         DL_req[NFAPI_CC_MAX];
+  /// a PDCCH PDU groups DCIs per BWP and CORESET. The following structure
+  /// keeps pointers to PDCCH PDUs within DL_req so that we can easily track
+  /// PDCCH PDUs per CC/BWP/CORESET
+  nfapi_nr_dl_tti_pdcch_pdu_rel15_t *pdcch_pdu_idx[NFAPI_CC_MAX][MAX_NUM_BWP][MAX_NUM_CORESET];
   /// NFAPI UL TTI Request Structure, simple pointer into structure
   /// UL_tti_req_ahead for current frame/slot
   nfapi_nr_ul_tti_request_t        *UL_tti_req[NFAPI_CC_MAX];