Fix the problem that might cause the connection issue

openair2/LAYER2/MAC/eNB_scheduler_ulsch_NB_IoT.c

@@ -279,7 +279,14 @@ void rx_sdu_NB_IoT(module_id_t module_id, int CC_id, frame_t frame, sub_frame_t
                   0);
                 LOG_D(MAC,"rx_lengths : %d\n", rx_lengths[i]);
                 msg4_rrc_pdu = mac_rrc_msg3_ind_NB_IoT(payload_ptr,rnti,rx_lengths[i]);
-                receive_msg3_NB_IoT(mac_inst,rnti,PHR,ul_total_buffer,first_6,msg4_rrc_pdu);
+                if (Valid_msg3 == 1)
+                {
+                  receive_msg3_NB_IoT(mac_inst,rnti,PHR,ul_total_buffer,first_6,msg4_rrc_pdu);
+                }else
+                {
+                  LOG_E(MAC,"Not available RA here\n");
+                  Valid_msg3 = 1;
+                }
                 LOG_I(MAC,"Contention resolution ID = %02x %02x %02x %02x %02x %02x\n",first_6[0],first_6[1],first_6[2],first_6[3],first_6[4],first_6[5]);
           break;
             case DCCH0_NB_IoT:

openair2/LAYER2/MAC/extern_NB_IoT.h

@@ -122,4 +122,5 @@ extern int extend_alpha_offset[2];
 extern const int si_repetition_pattern[4];
 extern int waiting_flag_from_RLC;
 extern int block_RLC;
+extern int Valid_msg3;
 #endif //DEF_H

openair2/LAYER2/MAC/vars_NB_IoT.h

@@ -146,6 +146,7 @@ const int si_repetition_pattern[4] = {20, 40, 80, 160};
 
 int waiting_flag_from_RLC = 0;
 int block_RLC = 0;
+int Valid_msg3 = 1;
 
 #endif
 

openair2/RRC/LITE/rrc_eNB.c

@@ -38,6 +38,7 @@
 #include "extern.h"
 #include "extern_NB_IoT.h"
 #include "LAYER2/MAC/proto_NB_IoT.h"
+#include "LAYER2/MAC/extern_NB_IoT.h"
 #include "RRC/LITE/MESSAGES/asn1_msg_NB_IoT.h"
 #include "RRCConnectionRequest-NB.h"
 #include "UL-CCCH-Message-NB.h"
@@ -223,7 +224,10 @@ uint8_t* mac_rrc_msg3_ind_NB_IoT(uint8_t *payload_ptr, uint16_t rnti, uint32_t l
     msg4_rrc_sdu = generate_msg4_NB_IoT(&eNB_rrc_inst_NB_IoT->carrier[0]);
   }
   else
+  {
 	 LOG_E(RRC,"unknown MSG3 format for NB-IoT for current test\n");
+   Valid_msg3 = 0;
+  }
   return msg4_rrc_sdu;
 }