Fix the logic of DL scheduling

openair2/LAYER2/MAC/eNB_scheduler_ulsch_NB_IoT.c

@@ -290,6 +290,7 @@ void rx_sdu_NB_IoT(module_id_t module_id, int CC_id, frame_t frame, sub_frame_t
                 LOG_I(MAC,"DCCH PDU Here\n");
                 if((UE_state_machine == initial_access)||(UE_state_machine == rach_for_next))
                 {
+                  block_RLC = 0;
                   mac_rlc_data_ind(
                     module_id,
                     rnti,

openair2/LAYER2/MAC/extern_NB_IoT.h

@@ -121,4 +121,5 @@ extern int extend_alpha_offset[2];
 
 extern const int si_repetition_pattern[4];
 extern int waiting_flag_from_RLC;
+extern int block_RLC;
 #endif //DEF_H

openair2/LAYER2/MAC/vars_NB_IoT.h

@@ -145,6 +145,7 @@ rach_state_t UE_state_machine = initial_access;
 const int si_repetition_pattern[4] = {20, 40, 80, 160};
 
 int waiting_flag_from_RLC = 0;
+int block_RLC = 0;
 
 #endif
 

openair2/RRC/LITE/L2_interface_NB_IoT.c

@@ -2616,7 +2616,11 @@ rlc_op_status_t rlc_data_req_NB_IoT (const protocol_ctxt_t* const ctxt_pP,
               }
               printf("\n");
         */
-        waiting_flag_from_RLC = 1;
+        if (block_RLC == 0)
+         { 
+          waiting_flag_from_RLC = 1;
+          block_RLC = 1;
+         }
         return RLC_OP_STATUS_OK;
       } else {
         VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_RLC_DATA_REQ,VCD_FUNCTION_OUT);