Only transfer BCH PDU if SI/SIB not decoded

openair2/LAYER2/MAC/mac.h

@@ -1769,6 +1769,7 @@ typedef struct {
   /// after the reception of NFAPI_UL_CONFIG_ULSCH_PDU_TYPE.
   uint8_t first_ULSCH_Tx;
   uint8_t SI_Decoded;
+  uint8_t SIB_Decoded;
   int ra_frame;   // This variable keeps the frame in which the RA started for the specific UE. It is used in order
   // to make sure that different UEs RA starts within a number of frames difference.
 

openair2/LAYER2/MAC/ue_procedures.c

@@ -161,6 +161,7 @@ void ue_init_mac(module_id_t module_idP) {
     UE_mac_inst[module_idP].UE_mode[0] = NOT_SYNCHED; //PRACH;
     UE_mac_inst[module_idP].first_ULSCH_Tx =0;
     UE_mac_inst[module_idP].SI_Decoded = 0;
+    UE_mac_inst[module_idP].SIB_Decoded = 0;
     next_ra_frame = 0;
     next_Mod_id = 0;
     tx_request_pdu_list = NULL;

openair2/RRC/LTE/L2_interface_ue.c

@@ -116,7 +116,7 @@ mac_rrc_data_req_ue(
 
   return(0);
 }
-
+extern UE_MAC_INST *UE_mac_inst;
 //------------------------------------------------------------------------------
 int8_t
 mac_rrc_data_ind_ue(
@@ -168,7 +168,9 @@ mac_rrc_data_ind_ue(
     }
   }
 
-  if(srb_idP == BCCH) {
+  if(srb_idP == BCCH
+      && (!UE_mac_inst[ctxt.instance].SI_Decoded
+          || !UE_mac_inst[ctxt.instance].SIB_Decoded)) {
     LOG_D(RRC,"[UE %d] Received SDU for BCCH on SRB %ld from eNB %d\n",module_idP,srb_idP,eNB_indexP);
     {
       MessageDef *message_p;

openair2/RRC/LTE/rrc_UE.c

@@ -2618,6 +2618,7 @@ int decode_BCCH_DLSCH_Message(
                     sizeof(LTE_SystemInformationBlockType1_t) );
             LOG_D( RRC, "[UE %"PRIu8"] Decoding First SIB1\n", ctxt_pP->module_id );
             decode_SIB1( ctxt_pP, eNB_index, rsrq, rsrp );
+            UE_mac_inst[ctxt_pP->module_id].SIB_Decoded = 1;
           }
         }