cu_cp,inter_du_ho: add UE creation in target DU

Author: andrepuschmann

lib/cu_cp/routines/mobility/inter_du_handover_routine.cpp

@@ -40,6 +40,15 @@ void inter_du_handover_routine::operator()(coro_context<async_task<cu_cp_inter_d
 
   logger.debug("ue={}: \"{}\" initialized.", command.source_ue_index, name());
 
+  {
+    // Create UE context for target DU w/o providing RNTI yet.
+    target_ue = ue_manager.add_ue(command.target_du_index, command.neighbor_pci, {});
+    if (target_ue == nullptr) {
+      logger.error("ue={}: \"{}\" failed to generate UE context at target DU.", command.source_ue_index, name());
+      CORO_EARLY_RETURN(response_msg);
+    }
+  }
+
   {
     // prepare F1AP UE Context Setup Command and call F1AP notifier of target DU
     if (!generate_ue_context_setup_request(
@@ -79,7 +88,7 @@ bool inter_du_handover_routine::generate_ue_context_setup_request(f1ap_ue_contex
                                                                   const std::map<srb_id_t, cu_srb_context>& srbs,
                                                                   const std::vector<drb_id_t>&              drbs)
 {
-  target_ue_context_setup_request.ue_index = command.source_ue_index;
+  target_ue_context_setup_request.ue_index = target_ue->get_ue_index();
 
   // TODO: fill SRBs and DRBs to be setup
 

lib/cu_cp/routines/mobility/inter_du_handover_routine.h

@@ -43,6 +43,7 @@ class inter_du_handover_routine
   const cu_cp_inter_du_handover_request command;
 
   du_ue* source_ue = nullptr; // Pointer to UE in the source DU
+  du_ue* target_ue = nullptr; // Pointer to UE in target DU
 
   du_processor_f1ap_ue_context_notifier& source_du_f1ap_ue_ctxt_notifier; // to trigger UE context creation at target DU
   du_processor_f1ap_ue_context_notifier& target_du_f1ap_ue_ctxt_notifier; // to trigger UE context creation at target DU