option for identity matrix if xp is 1

openair2/LAYER2/NR_MAC_gNB/config.c

@@ -137,11 +137,10 @@ void process_CellGroup(NR_CellGroupConfig_t *CellGroup, NR_UE_sched_ctrl_t *sche
 
 }
 
-void config_common(int Mod_idP, int ssb_SubcarrierOffset, rrc_pdsch_AntennaPorts_t dl_antenna_ports_struct, int pusch_AntennaPorts, NR_ServingCellConfigCommon_t *scc) {
+void config_common(int Mod_idP, int ssb_SubcarrierOffset, int pdsch_AntennaPorts, int pusch_AntennaPorts, NR_ServingCellConfigCommon_t *scc) {
 
   nfapi_nr_config_request_scf_t *cfg = &RC.nrmac[Mod_idP]->config[0];
   RC.nrmac[Mod_idP]->common_channels[0].ServingCellConfigCommon = scc;
-  int pdsch_AntennaPorts = dl_antenna_ports_struct.N1 * dl_antenna_ports_struct.N2 * dl_antenna_ports_struct.XP;
 
   // Carrier configuration
 
@@ -465,9 +464,10 @@ int rrc_mac_config_req_gNB(module_id_t Mod_idP,
 
     LOG_I(NR_MAC,"Configuring common parameters from NR ServingCellConfig\n");
 
+    RC.nrmac[Mod_idP]->pdsch_antenna_ports = pdsch_AntennaPorts.N1 * pdsch_AntennaPorts.N2 * pdsch_AntennaPorts.XP;
     config_common(Mod_idP,
                   ssb_SubcarrierOffset,
-                  pdsch_AntennaPorts,
+                  RC.nrmac[Mod_idP]->pdsch_antenna_ports,
                   pusch_AntennaPorts,
 		  scc);
     LOG_D(NR_MAC, "%s() %s:%d RC.nrmac[Mod_idP]->if_inst->NR_PHY_config_req:%p\n", __FUNCTION__, __FILE__, __LINE__, RC.nrmac[Mod_idP]->if_inst->NR_PHY_config_req);

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_dlsch.c

@@ -1183,6 +1183,7 @@ void nr_schedule_ue_spec(module_id_t module_id,
                                                                             nrOfLayers,
                                                                             csi_report->N1,
                                                                             csi_report->N2,
+                                                                            gNB_mac->pdsch_antenna_ports,
                                                                             csi_report->codebook_mode);
     }
 

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_primitives.c

@@ -149,11 +149,16 @@ uint8_t set_dl_nrOfLayers(NR_UE_sched_ctrl_t *sched_ctrl) {
 uint16_t set_pm_index(NR_UE_sched_ctrl_t *sched_ctrl,
                       int layers,
                       int N1, int N2,
+                      int config_file_ant_ports,
                       int codebook_mode) {
 
+  int antenna_ports = (N1*N2)<<1;
+  if (antenna_ports!=config_file_ant_ports)
+    return 0; //identity matrix
+
   int x1 = sched_ctrl->CSI_report.cri_ri_li_pmi_cqi_report.pmi_x1;
   int x2 = sched_ctrl->CSI_report.cri_ri_li_pmi_cqi_report.pmi_x2;
-  int antenna_ports = (N1*N2)<<1;
+  LOG_D(NR_MAC,"PMI report: x1 %d x2 %d\n",x1,x2);
 
   sched_ctrl->set_pmi = false;
 

openair2/LAYER2/NR_MAC_gNB/mac_proto.h

@@ -40,7 +40,7 @@ void mac_top_init_gNB(void);
 
 void config_common(int Mod_idP,
                    int ssb_SubcarrierOffset,
-                   rrc_pdsch_AntennaPorts_t pdsch_AntennaPorts,
+                   int pdsch_AntennaPorts,
                    int pusch_AntennaPorts,
 		   NR_ServingCellConfigCommon_t *scc
 		   );
@@ -458,6 +458,7 @@ void set_dl_dmrs_ports(NR_pdsch_semi_static_t *ps);
 uint16_t set_pm_index(NR_UE_sched_ctrl_t *sched_ctrl,
                       int layers,
                       int N1, int N2,
+                      int config_file_ant_ports,
                       int codebook_mode);
 
 void set_dl_mcs(NR_sched_pdsch_t *sched_pdsch,

openair2/LAYER2/NR_MAC_gNB/nr_mac_gNB.h

@@ -806,6 +806,8 @@ typedef struct gNB_MAC_INST_s {
   uint16_t cset0_bwp_size;
   NR_Type0_PDCCH_CSS_config_t type0_PDCCH_CSS_config[64];
 
+  int pdsch_antenna_ports;
+
   bool first_MIB;
   double dl_bler_target_upper;
   double dl_bler_target_lower;