Use vrb_map in in DL for NSA mode

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler.c

@@ -444,8 +444,8 @@ void gNB_dlsch_ulsch_scheduler(module_id_t module_idP,
     //mbsfn_status[CC_id] = 0;
 
     // clear vrb_maps
-    memset(cc[CC_id].vrb_map, 0, 100);
+    memset(cc[CC_id].vrb_map, 0, 275);
-    memset(cc[CC_id].vrb_map_UL, 0, 100);
+    memset(cc[CC_id].vrb_map_UL, 0, 275);
 
     clear_nr_nfapi_information(RC.nrmac[module_idP], CC_id, frame, slot);
   }

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_RA.c

@@ -550,7 +550,6 @@ void nr_generate_Msg2(module_id_t module_idP,
 
   uint16_t RA_rnti = ra->RA_rnti;
   long locationAndBandwidth;
-  // uint8_t *vrb_map = cc[CC_id].vrb_map, CC_id;
 
   // check if UE is doing RA on CORESET0 , InitialBWP or configured BWP from SCD
   // get the BW of the PDCCH for PDCCH size and RAR PDSCH size
@@ -740,6 +739,11 @@ void nr_generate_Msg2(module_id_t module_idP,
     nr_mac->TX_req[CC_id].Number_of_PDUs++;
     nr_mac->TX_req[CC_id].Slot = slotP;
     memcpy((void*)&tx_req->TLVs[0].value.direct[0], (void*)&cc[CC_id].RAR_pdu.payload[0], tx_req->TLVs[0].length);
+
+    /* mark the corresponding RBs as used */
+    uint8_t *vrb_map = cc[CC_id].vrb_map;
+    for (int rb = 0; rb < pdsch_pdu_rel15->rbSize; rb++)
+      vrb_map[rb + pdsch_pdu_rel15->rbStart] = 1;
   }
 }
 

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_bch.c

@@ -137,6 +137,11 @@ void schedule_nr_mib(module_id_t module_idP, frame_t frameP, sub_frame_t slotP){
       dl_config_pdu->ssb_pdu.ssb_pdu_rel15.bchPayloadFlag      = 1;
       dl_config_pdu->ssb_pdu.ssb_pdu_rel15.bchPayload          = (*(uint32_t*)cc->MIB_pdu.payload) & ((1<<24)-1);
       dl_req->nPDUs++;
+
+      uint8_t *vrb_map = cc[CC_id].vrb_map;
+      const int rbStart = dl_config_pdu->ssb_pdu.ssb_pdu_rel15.ssbOffsetPointA;
+      for (int rb = 0; rb < 20; rb++)
+        vrb_map[rbStart + rb] = 1;
     }
   }
 }

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_dlsch.c

@@ -517,9 +517,19 @@ void nr_simple_dlsch_preprocessor(module_id_t module_id,
   sched_ctrl->time_domain_allocation = 2;
 
   // Freq-demain allocation
+  uint8_t *vrb_map = RC.nrmac[module_id]->common_channels[CC_id].vrb_map;
   const uint16_t bwpSize = NRRIV2BW(sched_ctrl->active_bwp->bwp_Common->genericParameters.locationAndBandwidth, 275);
-  sched_ctrl->rbSize = bwpSize;
+  int rbStart = NRRIV2PRBOFFSET(sched_ctrl->active_bwp->bwp_Common->genericParameters.locationAndBandwidth, 275);
-  sched_ctrl->rbStart = 0;
+  while (rbStart < bwpSize && vrb_map[rbStart]) rbStart++;
+  int rbSize = 1;
+  while (rbStart + rbSize < bwpSize && !vrb_map[rbStart + rbSize]) rbSize++;
+  DevAssert(rbSize >= 3); /* just ensure we have at least 3 RBs */
+  sched_ctrl->rbSize = rbSize;
+  sched_ctrl->rbStart = rbStart;
+
+  /* mark the corresponding RBs as used */
+  for (int rb = 0; rb < sched_ctrl->rbSize; rb++)
+    vrb_map[rb + sched_ctrl->rbStart] = 1;
 
   // modulation scheme
   sched_ctrl->mcsTableIdx = 0;

openair2/LAYER2/NR_MAC_gNB/nr_mac_gNB.h

@@ -172,9 +172,9 @@ typedef struct {
   /// Template for RA computations
   NR_RA_t ra[NR_NB_RA_PROC_MAX];
   /// VRB map for common channels
-  uint8_t vrb_map[100];
+  uint8_t vrb_map[275];
   /// VRB map for common channels and retransmissions by PHICH
-  uint8_t vrb_map_UL[100];
+  uint8_t vrb_map_UL[275];
   /// number of subframe allocation pattern available for MBSFN sync area
   uint8_t num_sf_allocation_pattern;
 } NR_COMMON_channels_t;