fix for DLSCH DMRS reference point (regression at the OAI UE introduced when testing with OAI gNB for a missing implementation in OAI gNB)

openair1/PHY/NR_TRANSPORT/nr_dlsch.c

@@ -730,7 +730,7 @@ static int do_one_dlsch(unsigned char *input_ptr, PHY_VARS_gNB *gNB, NR_gNB_DLSC
 #endif
     }
     uint32_t dmrs_idx = rel15->rbStart;
-    if (rel15->rnti != SI_RNTI)
+    if (rel15->refPoint == 0)
       dmrs_idx += rel15->BWPStart;
     dmrs_idx *= dmrs_Type == NFAPI_NR_DMRS_TYPE1 ? 6 : 4;
     c16_t txdataF_precoding[rel15->nrOfLayers][symbol_sz] __attribute__((aligned(64)));

openair2/LAYER2/NR_MAC_UE/nr_ue_procedures.c

@@ -749,14 +749,8 @@ static int nr_ue_process_dci_dl_10(NR_UE_MAC_INST_t *mac,
   }
 
   dlsch_pdu->rb_offset = dlsch_pdu->start_rb + dlsch_pdu->BWPStart;
-  bool otherSI = false;
-  for (int i = 0; i < MAX_SI_GROUPS; i++) {
-    if (mac->get_otherSI[i]) {
-      otherSI = true;
-      break;
-    }
-  }
-  if (mac->get_sib1 || otherSI)
+
+  if (mac->get_sib1)
     dlsch_pdu->rb_offset -= dlsch_pdu->BWPStart;
 
   /* TIME_DOM_RESOURCE_ASSIGNMENT */

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_bch.c

@@ -460,7 +460,7 @@ static void nr_fill_nfapi_dl_SIB_pdu(gNB_MAC_INST *gNB_mac,
   pdsch_pdu_rel15->dataScramblingId = *scc->physCellId;
   pdsch_pdu_rel15->nrOfLayers = 1;
   pdsch_pdu_rel15->transmissionScheme = 0;
-  pdsch_pdu_rel15->refPoint = 1;
+  pdsch_pdu_rel15->refPoint = is_sib1;
   pdsch_pdu_rel15->dmrsConfigType = 0;
   pdsch_pdu_rel15->dlDmrsScramblingId = *scc->physCellId;
   pdsch_pdu_rel15->SCID = 0;