added minimum CFI to config

srsenb/src/enb_cfg_parser.cc

@@ -937,9 +937,14 @@ int set_derived_args(all_args_t* args_, rrc_cfg_t* rrc_cfg_, phy_cfg_t* phy_cfg_
   rrc_cfg_->enable_mbsfn          = args_->stack.embms.enable;
 
   // Check number of control symbols
+  if (args_->stack.mac.sched.min_nof_ctrl_symbols > args_->stack.mac.sched.max_nof_ctrl_symbols) {
+    ERROR("Invalid minimum number of control symbols %d. Setting it to 1.\n",
+          args_->stack.mac.sched.min_nof_ctrl_symbols);
+    args_->stack.mac.sched.min_nof_ctrl_symbols = 1;
+  }
   if (cell_cfg_.nof_prb < 50 && args_->stack.mac.sched.max_nof_ctrl_symbols != 3) {
     args_->stack.mac.sched.max_nof_ctrl_symbols = 3;
-    INFO("Setting number of control symbols to %d for %d PRB cell.\n",
+    INFO("Setting maximum number of control symbols to %d for %d PRB cell.\n",
          args_->stack.mac.sched.max_nof_ctrl_symbols,
          cell_cfg_.nof_prb);
   }

srsenb/src/main.cc

@@ -129,7 +129,8 @@ void parse_args(all_args_t* args, int argc, char* argv[])
     ("scheduler.pusch_mcs", bpo::value<int>(&args->stack.mac.sched.pusch_mcs)->default_value(-1), "Optional fixed PUSCH MCS (ignores reported CQIs if specified)")
     ("scheduler.pusch_max_mcs", bpo::value<int>(&args->stack.mac.sched.pusch_max_mcs)->default_value(-1), "Optional PUSCH MCS limit")
     ("scheduler.max_aggr_level", bpo::value<int>(&args->stack.mac.sched.max_aggr_level)->default_value(-1), "Optional maximum aggregation level index (l=log2(L)) ")
-    ("scheduler.nof_ctrl_symbols", bpo::value<uint32_t>(&args->stack.mac.sched.max_nof_ctrl_symbols)->default_value(3), "Number of control symbols")
+    ("scheduler.max_nof_ctrl_symbols", bpo::value<uint32_t>(&args->stack.mac.sched.max_nof_ctrl_symbols)->default_value(3), "Number of control symbols")
+    ("scheduler.min_nof_ctrl_symbols", bpo::value<uint32_t>(&args->stack.mac.sched.min_nof_ctrl_symbols)->default_value(1), "Minimum number of control symbols")
 
     /* Downlink Channel emulator section */
     ("channel.dl.enable", bpo::value<bool>(&args->phy.dl_channel_args.enable)->default_value(false), "Enable/Disable internal Downlink channel emulator")