setting max mcs to the one reported by CSI

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_dlsch.c

@@ -701,7 +701,7 @@ void pf_dl(module_id_t module_id,
         continue;
 
       /* Calculate coeff */
-      set_dl_mcs(sched_pdsch,sched_ctrl,ps->mcsTableIdx);
+      set_dl_mcs(sched_pdsch,sched_ctrl,&mac->dl_max_mcs,ps->mcsTableIdx);
       sched_pdsch->mcs = get_mcs_from_bler(module_id, /* CC_id = */ 0, frame, slot, UE_id);
       layers[UE_id] = set_dl_nrOfLayers(sched_ctrl);
       const uint8_t Qm = nr_get_Qm_dl(sched_pdsch->mcs, ps->mcsTableIdx);

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_primitives.c

@@ -147,6 +147,7 @@ uint8_t set_dl_nrOfLayers(NR_UE_sched_ctrl_t *sched_ctrl) {
 
 void set_dl_mcs(NR_sched_pdsch_t *sched_pdsch,
                 NR_UE_sched_ctrl_t *sched_ctrl,
+                uint8_t *target_mcs,
                 uint8_t mcs_table_idx) {
 
   if (sched_ctrl->set_mcs) {
@@ -180,14 +181,11 @@ void set_dl_mcs(NR_sched_pdsch_t *sched_pdsch,
         R = nr_get_code_rate_dl(i, mcs_table_idx);
         Qm = nr_get_Qm_dl(i, mcs_table_idx);
         if ((Qm == target_qm) && (target_coderate <= R)) {
-          sched_pdsch->mcs = i;
+          *target_mcs = i;
           break;
         }
       }
     }
-    else // default value
-      sched_pdsch->mcs = 9;
-
     sched_ctrl->set_mcs = FALSE;
   }
 }

openair2/LAYER2/NR_MAC_gNB/mac_proto.h

@@ -429,6 +429,7 @@ void set_dl_dmrs_ports(NR_pdsch_semi_static_t *ps);
 
 void set_dl_mcs(NR_sched_pdsch_t *sched_pdsch,
                 NR_UE_sched_ctrl_t *sched_ctrl,
+                uint8_t *target_mcs,
                 uint8_t mcs_table_idx);
 
 uint8_t set_dl_nrOfLayers(NR_UE_sched_ctrl_t *sched_ctrl);