no data in dmrs symbol (hardcoded)

openair1/PHY/NR_TRANSPORT/nr_dlsch.c

@@ -133,7 +133,7 @@ uint8_t nr_generate_pdsch(NR_gNB_DLSCH_t *dlsch,
   int16_t **mod_symbs = (int16_t**)dlsch->mod_symbs;
   int16_t **tx_layers = (int16_t**)dlsch->txdataF;
   int8_t Wf[2], Wt[2], l0, l_prime[2], delta;
-
+  uint8_t nodata_dmrs = 1;
   uint8_t dmrs_Type = rel15->dmrsConfigType;
   int nb_re_dmrs = (dmrs_Type== NFAPI_NR_DMRS_TYPE1) ? 6:4;
   uint16_t n_dmrs = ((rel15->rbSize+rel15->rbStart)*nb_re_dmrs)<<1;
@@ -297,15 +297,16 @@ uint8_t nr_generate_pdsch(NR_gNB_DLSCH_t *dlsch,
         }
 
         else {
-
-          ((int16_t*)txdataF[ap])[((l*frame_parms->ofdm_symbol_size + k)<<1) + (2*txdataF_offset)] = (amp * tx_layers[ap][m<<1]) >> 15;
-          ((int16_t*)txdataF[ap])[((l*frame_parms->ofdm_symbol_size + k)<<1) + 1 + (2*txdataF_offset)] = (amp * tx_layers[ap][(m<<1) + 1]) >> 15;
+          if( (l != dmrs_symbol) || !nodata_dmrs) {
+            ((int16_t*)txdataF[ap])[((l*frame_parms->ofdm_symbol_size + k)<<1) + (2*txdataF_offset)] = (amp * tx_layers[ap][m<<1]) >> 15;
+            ((int16_t*)txdataF[ap])[((l*frame_parms->ofdm_symbol_size + k)<<1) + 1 + (2*txdataF_offset)] = (amp * tx_layers[ap][(m<<1) + 1]) >> 15;
 #ifdef DEBUG_DLSCH_MAPPING
-	  printf("m %d\t l %d \t k %d \t txdataF: %d %d\n",
-m, l, k, ((int16_t*)txdataF[ap])[((l*frame_parms->ofdm_symbol_size + k)<<1) + (2*txdataF_offset)],
-		 ((int16_t*)txdataF[ap])[((l*frame_parms->ofdm_symbol_size + k)<<1) + 1 + (2*txdataF_offset)]);
+	    printf("m %d\t l %d \t k %d \t txdataF: %d %d\n",
+                   m, l, k, ((int16_t*)txdataF[ap])[((l*frame_parms->ofdm_symbol_size + k)<<1) + (2*txdataF_offset)],
+		   ((int16_t*)txdataF[ap])[((l*frame_parms->ofdm_symbol_size + k)<<1) + 1 + (2*txdataF_offset)]);
 #endif
-          m++;
+            m++;
+          }
         }
         if (++k >= frame_parms->ofdm_symbol_size)
           k -= frame_parms->ofdm_symbol_size;

openair2/LAYER2/NR_MAC_COMMON/nr_mac_common.c

@@ -1382,13 +1382,18 @@ int32_t get_nr_uldl_offset(int nr_bandP)
 
 void nr_get_tbs_dl(nfapi_nr_dl_tti_pdsch_pdu *pdsch_pdu,
 		   int x_overhead,
+                   uint8_t nodata_dmrs,
                    uint8_t tb_scaling) {
 
   LOG_D(MAC, "TBS calculation\n");
 
   nfapi_nr_dl_tti_pdsch_pdu_rel15_t *pdsch_rel15 = &pdsch_pdu->pdsch_pdu_rel15;
   uint16_t N_PRB_oh = x_overhead;
-  uint8_t N_PRB_DMRS = (pdsch_rel15->dmrsConfigType == NFAPI_NR_DMRS_TYPE1)?6:4; //This only works for antenna port 1000
+  uint8_t N_PRB_DMRS;
+  if (nodata_dmrs)
+    N_PRB_DMRS = 12;
+  else
+    N_PRB_DMRS = (pdsch_rel15->dmrsConfigType == NFAPI_NR_DMRS_TYPE1)?6:4; //This only works for antenna port 1000
   uint8_t N_sh_symb = pdsch_rel15->NrOfSymbols;
   uint8_t Imcs = pdsch_rel15->mcsIndex[0];
   uint16_t N_RE_prime = NR_NB_SC_PER_RB*N_sh_symb - N_PRB_DMRS - N_PRB_oh;
@@ -1421,7 +1426,7 @@ void nr_get_tbs_dl(nfapi_nr_dl_tti_pdsch_pdu *pdsch_pdu,
   //  pdsch_rel15->nb_mod_symbols = N_RE_prime*pdsch_rel15->n_prb*pdsch_rel15->nb_codewords;
   pdsch_rel15->mcsTable[0] = table_idx;
 
-  LOG_D(MAC, "TBS %d bytes: N_PRB_DMRS %d N_sh_symb %d N_PRB_oh %d R %d Qm %d table %d nb_symbols %d\n",
+  LOG_I(MAC, "TBS %d bytes: N_PRB_DMRS %d N_sh_symb %d N_PRB_oh %d R %d Qm %d table %d nb_symbols %d\n",
   TBS, N_PRB_DMRS, N_sh_symb, N_PRB_oh, R, Qm, table_idx,N_RE_prime*pdsch_rel15->rbSize*pdsch_rel15->NrOfCodewords );
 }
 

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_RA.c

@@ -546,7 +546,14 @@ void nr_generate_Msg2(module_id_t module_idP,
     pdsch_pdu_rel15->targetCodeRate[0] = nr_get_code_rate_dl(mcsIndex,0);
     pdsch_pdu_rel15->qamModOrder[0] = 2;
     pdsch_pdu_rel15->mcsIndex[0] = mcsIndex;
-    pdsch_pdu_rel15->mcsTable[0] = 0;
+    if (bwp->bwp_Dedicated->pdsch_Config->choice.setup->mcs_Table == NULL)
+      pdsch_pdu_rel15->mcsTable[0] = 0;
+    else{
+      if (*bwp->bwp_Dedicated->pdsch_Config->choice.setup->mcs_Table == 0)
+        pdsch_pdu_rel15->mcsTable[0] = 1;
+      else
+        pdsch_pdu_rel15->mcsTable[0] = 2;
+    }
     pdsch_pdu_rel15->rvIndex[0] = 0;
     pdsch_pdu_rel15->dataScramblingId = *scc->physCellId;
     pdsch_pdu_rel15->nrOfLayers = 1;
@@ -559,7 +566,7 @@ void nr_generate_Msg2(module_id_t module_idP,
     pdsch_pdu_rel15->dmrsPorts = 1;
     pdsch_pdu_rel15->resourceAlloc = 1;
     pdsch_pdu_rel15->rbStart = 0;
-    pdsch_pdu_rel15->rbSize = 7;
+    pdsch_pdu_rel15->rbSize = 6;
     pdsch_pdu_rel15->VRBtoPRBMapping = 0; // non interleaved
 
     for (int i=0; i<bwp->bwp_Common->pdsch_ConfigCommon->choice.setup->pdsch_TimeDomainAllocationList->list.count; i++) {
@@ -578,7 +585,6 @@ 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[MAX_DCI_CORESET];
     dci_pdu_rel15[0].frequency_domain_assignment = PRBalloc_to_locationandbandwidth0(pdsch_pdu_rel15->rbSize,
 										     pdsch_pdu_rel15->rbStart,dci10_bw);
@@ -635,7 +641,7 @@ void nr_generate_Msg2(module_id_t module_idP,
     LOG_D(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, dci_pdu_rel15[0].tb_scaling);
+    nr_get_tbs_dl(&dl_tti_pdsch_pdu->pdsch_pdu, x_Overhead, 1, dci_pdu_rel15[0].tb_scaling);
 
     // DL TX request
     tx_req->PDU_length = pdsch_pdu_rel15->TBSize[0];

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_phytest.c

@@ -406,7 +406,7 @@ int configure_fapi_dl_pdu(int Mod_idP,
 	pdcch_pdu_rel15->DurationSymbols);
 
   int x_Overhead = 0; // should be 0 for initialBWP
-  nr_get_tbs_dl(&dl_tti_pdsch_pdu->pdsch_pdu, x_Overhead,0);
+  nr_get_tbs_dl(&dl_tti_pdsch_pdu->pdsch_pdu, 1, x_Overhead,0);
 
   // Hardcode it for now
   TBS = dl_tti_pdsch_pdu->pdsch_pdu.pdsch_pdu_rel15.TBSize[0];

openair2/LAYER2/NR_MAC_gNB/mac_proto.h

@@ -185,6 +185,7 @@ int to_absslot(nfapi_nr_config_request_scf_t *cfg,int frame,int slot);
 
 void nr_get_tbs_dl(nfapi_nr_dl_tti_pdsch_pdu *pdsch_pdu,
 		   int x_overhead,
+                   uint8_t nodata_dmrs,
                    uint8_t tb_scaling);
 /** \brief Computes Q based on I_MCS PDSCH and table_idx for downlink. Implements MCS Tables from 38.214. */
 uint8_t nr_get_Qm_dl(uint8_t Imcs, uint8_t table_idx);

targets/PROJECTS/GENERIC-LTE-EPC/CONF/gnb.band78.tm1.106PRB.usrpn300.conf

@@ -75,7 +75,7 @@ gNBs =
              initialDLBWPk0_3                    = 0;
              initialDLBWPmappingType_3           = 0;
              #this is SS=1,L=4
-             initialDLBWPstartSymbolAndLength_3  = 43;
+             initialDLBWPstartSymbolAndLength_3  = 57;
 
   #uplinkConfigCommon 
      #frequencyInfoUL