Added message-based communication between L2 and L1 regarding NTN configuration parameters

openair1/PHY/INIT/nr_init_ue.c

@@ -338,6 +338,8 @@ void term_nr_ue_signal(PHY_VARS_NR_UE *ue, int nb_connected_gNB)
     free_and_zero(ue->prs_vars[idx]);
   }
 
+  free_and_zero(ue->ntn_config_message);
+  
   sl_ue_free(ue);
 }
 

openair1/PHY/defs_nr_UE.h

@@ -322,6 +322,11 @@ typedef struct UE_NR_SCAN_INFO_s {
   int32_t freq_offset_Hz[3][10];
 } UE_NR_SCAN_INFO_t;
 
+typedef struct {
+  bool update;
+  fapi_nr_dl_ntn_config_command_pdu ntn_config_params;
+} ntn_config_message_t;
+
 /// Top-level PHY Data Structure for UE
 typedef struct PHY_VARS_NR_UE_s {
   /// \brief Module ID indicator for this instance
@@ -532,6 +537,9 @@ typedef struct PHY_VARS_NR_UE_s {
   sl_nr_ue_phy_params_t SL_UE_PHY_PARAMS;
   Actor_t sync_actor;
   Actor_t dl_actors[NUM_DL_ACTORS];
+  
+  ntn_config_message_t* ntn_config_message;
+
 } PHY_VARS_NR_UE;
 
 typedef struct {

openair1/SCHED_NR_UE/fapi_nr_ue_l1.c

@@ -326,6 +326,19 @@ static void configure_dlsch(NR_UE_DLSCH_t *dlsch0,
   }
 }
 
+static void configure_ntn_params(PHY_VARS_NR_UE *ue, fapi_nr_dl_ntn_config_command_pdu* ntn_params_message)
+{
+  if (!ue->ntn_config_message) {
+    ue->ntn_config_message = CALLOC(1, sizeof(*ue->ntn_config_message));
+  }
+
+  ue->ntn_config_message->ntn_config_params.cell_specific_k_offset = ntn_params_message->cell_specific_k_offset;
+  ue->ntn_config_message->ntn_config_params.N_common_ta_adj = ntn_params_message->N_common_ta_adj;
+  ue->ntn_config_message->ntn_config_params.ntn_ta_commondrift = ntn_params_message->ntn_ta_commondrift;
+  ue->ntn_config_message->ntn_config_params.ntn_total_time_advance_ms = ntn_params_message->ntn_total_time_advance_ms;
+  ue->ntn_config_message->update = true;
+}
+
 static void configure_ta_command(PHY_VARS_NR_UE *ue, fapi_nr_ta_command_pdu *ta_command_pdu)
 {
   /* Time Alignment procedure
@@ -451,6 +464,9 @@ static void nr_ue_scheduled_response_dl(NR_UE_MAC_INST_t *mac,
       case FAPI_NR_CONFIG_TA_COMMAND:
         configure_ta_command(phy, &pdu->ta_command_pdu);
         break;
+      case FAPI_NR_DL_NTN_CONFIG_PARAMS:
+        configure_ntn_params(phy, &pdu->ntn_config_command_pdu);
+        break;
       default:
         LOG_W(PHY, "unhandled dl pdu type %d \n", pdu->pdu_type);
     }