Indicate to NAS that the RRC connection has been established with a Connection Establishment Indication

* ITTI from RRC to NAS
* according to 5.3.1.3 of 3GPP TS 24.501
* set 5GMM mode to CONNECTED

openair2/COMMON/rrc_messages_def.h

@@ -74,6 +74,7 @@ MESSAGE_DEF(NAS_CELL_SELECTION_IND, MESSAGE_PRIORITY_MED, cell_info_ind_t, nas_c
 MESSAGE_DEF(NAS_PAGING_IND, MESSAGE_PRIORITY_MED, paging_ind_t, nas_paging_ind)
 MESSAGE_DEF(NAS_CONN_ESTABLI_CNF, MESSAGE_PRIORITY_MED, nas_establish_cnf_t, nas_conn_establi_cnf)
 MESSAGE_DEF(NAS_CONN_RELEASE_IND, MESSAGE_PRIORITY_MED, nas_release_ind_t, nas_conn_release_ind)
+MESSAGE_DEF(NR_NAS_CONN_ESTABLISH_IND, MESSAGE_PRIORITY_MED, nas_establish_ind_t, nr_nas_conn_establish_ind)
 MESSAGE_DEF(NR_NAS_CONN_RELEASE_IND,    MESSAGE_PRIORITY_MED,       NRNasConnReleaseInd,        nr_nas_conn_release_ind)
 MESSAGE_DEF(NAS_UPLINK_DATA_CNF, MESSAGE_PRIORITY_MED, ul_info_transfer_cnf_t, nas_ul_data_cnf)
 MESSAGE_DEF(NAS_DOWNLINK_DATA_IND, MESSAGE_PRIORITY_MED, dl_info_transfer_ind_t, nas_dl_data_ind)

openair2/COMMON/rrc_messages_types.h

@@ -84,6 +84,7 @@
 #define NAS_PAGING_IND(mSGpTR)          (mSGpTR)->ittiMsg.nas_paging_ind
 #define NAS_CONN_ESTABLI_CNF(mSGpTR)    (mSGpTR)->ittiMsg.nas_conn_establi_cnf
 #define NAS_CONN_RELEASE_IND(mSGpTR)    (mSGpTR)->ittiMsg.nas_conn_release_ind
+#define NR_NAS_CONN_ESTABLISH_IND(mSGpTR) (mSGpTR)->ittiMsg.nr_nas_conn_establish_ind
 #define NR_NAS_CONN_RELEASE_IND(mSGpTR) (mSGpTR)->ittiMsg.nr_nas_conn_release_ind
 #define NAS_UPLINK_DATA_CNF(mSGpTR)     (mSGpTR)->ittiMsg.nas_ul_data_cnf
 #define NAS_DOWNLINK_DATA_IND(mSGpTR)   (mSGpTR)->ittiMsg.nas_dl_data_ind

openair2/RRC/NR_UE/rrc_UE.c

@@ -1182,6 +1182,10 @@ static void nr_rrc_process_rrcsetup(NR_UE_RRC_INST_t *rrc,
   // enter RRC_CONNECTED
   rrc->nrRrcState = RRC_STATE_CONNECTED_NR;
 
+  // Indicate to NAS that the RRC connection has been established (5.3.1.3 of 3GPP TS 24.501)
+  MessageDef *msg_p = itti_alloc_new_message(TASK_RRC_NRUE, 0, NR_NAS_CONN_ESTABLISH_IND);
+  itti_send_msg_to_task(TASK_NAS_NRUE, rrc->ue_id, msg_p);
+
   // set the content of RRCSetupComplete message
   // TODO procedues described in 5.3.3.4 seems more complex than what we actualy do
   rrc_ue_generate_RRCSetupComplete(rrc, rrcSetup->rrc_TransactionIdentifier);

openair3/NAS/NR_UE/nr_nas_msg.c

@@ -1516,6 +1516,16 @@ void *nas_nrue(void *args_p)
         break;
       }
 
+      case NR_NAS_CONN_ESTABLISH_IND: {
+        nas->fiveGMM_mode = FGS_CONNECTED;
+        LOG_I(NAS,
+              "[UE %ld] Received %s: asCause %u\n",
+              nas->UE_id,
+              ITTI_MSG_NAME(msg_p),
+              NR_NAS_CONN_ESTABLISH_IND(msg_p).asCause);
+        break;
+      }
+
       case NAS_CONN_ESTABLI_CNF: {
         LOG_I(NAS,
               "[UE %ld] Received %s: errCode %u, length %u\n",