ensure sibs are acquired if cell selection calls cell search

srsue/hdr/stack/rrc/rrc_procedures.h

@@ -149,7 +149,7 @@ private:
   bool                                                            serv_cell_select_attempted = false;
   srslte::proc_future_t<rrc_interface_phy_lte::cell_search_ret_t> cell_search_fut;
   srslte::proc_future_t<void>                                     serv_cell_cfg_fut;
-  bool                                                            discard_serving = false;
+  bool                                                            discard_serving = false, cell_search_called = false;
   std::vector<uint32_t>                                           required_sibs = {};
 };
 

srsue/src/stack/rrc/rrc_procedures.cc

@@ -483,6 +483,9 @@ proc_outcome_t rrc::cell_selection_proc::init(std::vector<uint32_t> required_sib
   }
   neigh_index                = 0;
   cs_result                  = cs_result_t::no_cell;
+  discard_serving            = false;
+  serv_cell_select_attempted = false;
+  cell_search_called         = false;
   if (serv_cell_is_ok) {
     state = search_state_t::cell_config;
     if (not rrc_ptr->serv_cell_cfg.launch(&serv_cell_cfg_fut, required_sibs)) {
@@ -492,8 +495,6 @@ proc_outcome_t rrc::cell_selection_proc::init(std::vector<uint32_t> required_sib
     return proc_outcome_t::yield;
   }
   state = search_state_t::cell_selection;
-  discard_serving            = false;
-  serv_cell_select_attempted = false;
   return start_cell_selection();
 }
 
@@ -576,12 +577,16 @@ proc_outcome_t rrc::cell_selection_proc::start_cell_selection()
   }
 
   // If any of the known cells meets the selection criteria or could not be selected, search again.
+  if (not cell_search_called) {
     Info("Could not select any known cell. Searching new cells\n");
+    state              = search_state_t::cell_search;
+    cell_search_called = true;
     if (not rrc_ptr->cell_searcher.launch(&cell_search_fut)) {
       return proc_outcome_t::error;
     }
-  state = search_state_t::cell_search;
     return step();
+  }
+  return proc_outcome_t::error;
 }
 
 proc_outcome_t rrc::cell_selection_proc::step_cell_selection(const bool& cs_ret)
@@ -634,6 +639,14 @@ proc_outcome_t rrc::cell_selection_proc::step_cell_search()
   }
   cs_result = (cell_search_fut.value()->found == cell_search_ret_t::CELL_FOUND) ? cs_result_t::changed_cell
                                                                                 : cs_result_t::no_cell;
+  if (rrc_ptr->cell_selection_criteria(rrc_ptr->meas_cells.serving_cell().get_rsrp())) {
+    Info("PHY is in SYNC and cell selection passed.\n");
+    state = search_state_t::cell_config;
+    if (not rrc_ptr->serv_cell_cfg.launch(&serv_cell_cfg_fut, required_sibs)) {
+      return proc_outcome_t::error;
+    }
+    return proc_outcome_t::yield;
+  }
   Info("Cell Search of cell selection run successfully\n");
   return proc_outcome_t::success;
 }