enb: use band_helper to derive freqencies for NR carrier

srsenb/src/CMakeLists.txt

@@ -22,7 +22,7 @@ if (RPATH)
 endif (RPATH)
 
 add_library(enb_cfg_parser STATIC parser.cc enb_cfg_parser.cc)
-target_link_libraries(enb_cfg_parser ${LIBCONFIGPP_LIBRARIES})
+target_link_libraries(enb_cfg_parser srsran_common ${LIBCONFIGPP_LIBRARIES})
 
 add_executable(srsenb main.cc enb.cc metrics_stdout.cc metrics_csv.cc metrics_json.cc)
 

srsenb/src/enb_cfg_parser.cc

@@ -13,6 +13,7 @@
 #include "enb_cfg_parser.h"
 #include "srsenb/hdr/enb.h"
 #include "srsran/asn1/rrc_utils.h"
+#include "srsran/common/band_helper.h"
 #include "srsran/common/multiqueue.h"
 #include "srsran/phy/common/phy_common.h"
 #include <boost/algorithm/string.hpp>
@@ -1093,12 +1094,15 @@ int set_derived_args(all_args_t* args_, rrc_cfg_t* rrc_cfg_, phy_cfg_t* phy_cfg_
     phy_cfg_->phy_cell_cfg.push_back(phy_cell_cfg);
   }
 
+  // Use helper class to derive NR carrier parameters
+  srsran::srsran_band_helper band_helper;
+
   // Create NR dedicated cell configuration from RRC configuration
   for (auto it = rrc_cfg_->cell_list_nr.begin(); it != rrc_cfg_->cell_list_nr.end(); ++it) {
     auto&             cfg                = *it;
     phy_cell_cfg_nr_t phy_cell_cfg       = {};
     phy_cell_cfg.carrier.max_mimo_layers = cell_cfg_.nof_ports;
-    phy_cell_cfg.carrier.nof_prb         = cell_cfg_.nof_prb;
+    phy_cell_cfg.carrier.nof_prb         = cell_cfg_.nof_prb; // TODO: convert NR PRBs
     phy_cell_cfg.carrier.pci             = cfg.pci;
     phy_cell_cfg.cell_id                 = cfg.cell_id;
     phy_cell_cfg.root_seq_idx            = cfg.root_seq_idx;
@@ -1109,16 +1113,25 @@ int set_derived_args(all_args_t* args_, rrc_cfg_t* rrc_cfg_, phy_cfg_t* phy_cfg_
     if (cfg.dl_freq_hz > 0) {
       phy_cell_cfg.dl_freq_hz = cfg.dl_freq_hz;
     } else {
-      phy_cell_cfg.dl_freq_hz = 1e6 * srsran_band_fd(cfg.dl_earfcn);
+      phy_cell_cfg.dl_freq_hz = band_helper.nr_arfcn_to_freq(cfg.dl_earfcn);
     }
 
     if (cfg.ul_freq_hz > 0) {
       phy_cell_cfg.ul_freq_hz = cfg.ul_freq_hz;
     } else {
+      // auto-detect UL frequency
       if (cfg.ul_earfcn == 0) {
-        cfg.ul_earfcn = srsran_band_ul_earfcn(cfg.dl_earfcn);
+        // derive UL ARFCN from given DL ARFCN
+        uint16_t             nr_band   = band_helper.get_band_from_dl_freq_Hz(phy_cell_cfg.dl_freq_hz);
+        srsran_duplex_mode_t nr_duplex = band_helper.get_duplex_mode(nr_band);
+        if (nr_duplex == SRSRAN_DUPLEX_MODE_TDD) {
+          cfg.ul_earfcn = cfg.dl_earfcn;
+        } else {
+          ERROR("Can't derive UL ARFCN from DL ARFCN");
+          return SRSRAN_ERROR;
         }
-      phy_cell_cfg.ul_freq_hz = 1e6 * srsran_band_fu(cfg.ul_earfcn);
+      }
+      phy_cell_cfg.ul_freq_hz = band_helper.nr_arfcn_to_freq(cfg.ul_earfcn);
     }
 
     phy_cfg_->phy_cell_cfg_nr.push_back(phy_cell_cfg);