ENDC: Reverse the role of eNB and gNB for the ENDC X2 setup procedure....

ENDC: Reverse the role of eNB and gNB for the ENDC X2 setup procedure. Currently, gNB: slave sending the setup request, eNB:master.

openair2/COMMON/s1ap_messages_types.h

@@ -81,7 +81,8 @@
 #ifndef OCP_FRAMEWORK
 typedef enum cell_type_e {
   CELL_MACRO_ENB,
-  CELL_HOME_ENB
+  CELL_HOME_ENB,
+  CELL_MACRO_GNB
 } cell_type_t;
 
 typedef enum paging_drx_e {

openair2/ENB_APP/enb_config.c

@@ -2126,6 +2126,11 @@ int RCconfig_S1(
               S1AP_REGISTER_ENB_REQ (msg_p).cell_type = CELL_MACRO_ENB;
             } else  if (strcmp(*(ENBParamList.paramarray[k][ENB_CELL_TYPE_IDX].strptr), "CELL_HOME_ENB") == 0) {
               S1AP_REGISTER_ENB_REQ (msg_p).cell_type = CELL_HOME_ENB;
+              // Temporary option to be able to parse an eNB configuration file which is treated as gNB from
+              // the X2AP layer and test the setup of an ENDC X2AP connection. To be removed when we are ready to
+              // parse an actual gNB configuration file wrt. the X2AP parameters instead.
+            } else  if (strcmp(*(ENBParamList.paramarray[k][ENB_CELL_TYPE_IDX].strptr), "CELL_MACRO_GNB") == 0) {
+              S1AP_REGISTER_ENB_REQ (msg_p).cell_type = CELL_MACRO_GNB;
             } else {
               AssertFatal(0,
                           "Failed to parse eNB configuration file %s, enb %d unknown value \"%s\" for cell_type choice: CELL_MACRO_ENB or CELL_HOME_ENB !\n",
@@ -2355,7 +2360,12 @@ int RCconfig_X2(MessageDef *msg_p, uint32_t i) {
               X2AP_REGISTER_ENB_REQ (msg_p).cell_type = CELL_MACRO_ENB;
             } else  if (strcmp(*(ENBParamList.paramarray[k][ENB_CELL_TYPE_IDX].strptr), "CELL_HOME_ENB") == 0) {
               X2AP_REGISTER_ENB_REQ (msg_p).cell_type = CELL_HOME_ENB;
-            } else {
+              // Temporary option to be able to parse an eNB configuration file which is treated as gNB from
+              // the X2AP layer and test the setup of an ENDC X2AP connection. To be removed when we are ready to
+              // parse an actual gNB configuration file wrt. the X2AP parameters instead.
+            } else  if (strcmp(*(ENBParamList.paramarray[k][ENB_CELL_TYPE_IDX].strptr), "CELL_MACRO_GNB") == 0) {
+                S1AP_REGISTER_ENB_REQ (msg_p).cell_type = CELL_MACRO_GNB;
+            }else {
               AssertFatal (0,
                            "Failed to parse eNB configuration file %s, enb %d unknown value \"%s\" for cell_type choice: CELL_MACRO_ENB or CELL_HOME_ENB !\n",
                            RC.config_file_name, i, *(ENBParamList.paramarray[k][ENB_CELL_TYPE_IDX].strptr));

openair2/X2AP/x2ap_eNB.c

@@ -101,7 +101,6 @@ void x2ap_eNB_handle_sctp_association_resp(instance_t instance, sctp_new_associa
   x2ap_eNB_instance_t *instance_p;
   x2ap_eNB_data_t *x2ap_enb_data_p;
   DevAssert(sctp_new_association_resp != NULL);
-  printf("x2ap_eNB_handle_sctp_association_resp at 1\n");
   dump_trees();
   instance_p = x2ap_eNB_get_instance(instance);
   DevAssert(instance_p != NULL);
@@ -129,7 +128,6 @@ void x2ap_eNB_handle_sctp_association_resp(instance_t instance, sctp_new_associa
   x2ap_enb_data_p = x2ap_get_eNB(instance_p, -1,
                                  sctp_new_association_resp->ulp_cnx_id);
   DevAssert(x2ap_enb_data_p != NULL);
-  printf("x2ap_eNB_handle_sctp_association_resp at 2\n");
   dump_trees();
 
   if (sctp_new_association_resp->sctp_state != SCTP_STATE_ESTABLISHED) {
@@ -142,17 +140,17 @@ void x2ap_eNB_handle_sctp_association_resp(instance_t instance, sctp_new_associa
     return;
   }
 
-  printf("x2ap_eNB_handle_sctp_association_resp at 3\n");
   dump_trees();
   /* Update parameters */
   x2ap_enb_data_p->assoc_id    = sctp_new_association_resp->assoc_id;
   x2ap_enb_data_p->in_streams  = sctp_new_association_resp->in_streams;
   x2ap_enb_data_p->out_streams = sctp_new_association_resp->out_streams;
-  printf("x2ap_eNB_handle_sctp_association_resp at 4\n");
   dump_trees();
   /* Prepare new x2 Setup Request */
+  if(instance_p->cell_type == CELL_MACRO_GNB)
+	  x2ap_gNB_generate_ENDC_x2_setup_request(instance_p, x2ap_enb_data_p);
+  else
 	  x2ap_eNB_generate_x2_setup_request(instance_p, x2ap_enb_data_p);
-  //x2ap_eNB_generate_ENDC_x2_setup_request(instance_p, x2ap_enb_data_p);
 }
 
 static

openair2/X2AP/x2ap_eNB_generate_messages.h

@@ -66,8 +66,8 @@ int x2ap_eNB_generate_senb_addition_request (x2ap_eNB_instance_t *instance_p, x2
 int x2ap_eNB_generate_senb_addition_request_ack (x2ap_eNB_instance_t *instance_p, x2ap_eNB_data_t *x2ap_eNB_data_p,
                                                x2ap_senb_addition_req_ack_t *x2ap_addition_req_ack);
 
-int x2ap_eNB_generate_ENDC_x2_setup_request(x2ap_eNB_instance_t *instance_p, x2ap_eNB_data_t *x2ap_eNB_data_p);
+int x2ap_gNB_generate_ENDC_x2_setup_request(x2ap_eNB_instance_t *instance_p, x2ap_eNB_data_t *x2ap_eNB_data_p);
 
-int x2ap_gNB_generate_ENDC_x2_setup_response( x2ap_eNB_instance_t *instance_p, x2ap_eNB_data_t *x2ap_eNB_data_p);
+int x2ap_eNB_generate_ENDC_x2_setup_response( x2ap_eNB_instance_t *instance_p, x2ap_eNB_data_t *x2ap_eNB_data_p);
 
 #endif /*  X2AP_ENB_GENERATE_MESSAGES_H_ */