TDD fixes in real-time environment

executables/nr-ru.c

@@ -734,8 +734,6 @@ void tx_rf(RU_t *ru,int frame,int slot, uint64_t timestamp) {
   nr_subframe_t SF_type     = nr_slot_select(cfg,slot%fp->slots_per_frame);
   int sf_extension = 0;
 
-  if ((SF_type == SF_DL) ||
-      (SF_type == SF_S)) {
     int siglen=fp->samples_per_slot,flags=1;
     /*
         if (SF_type == SF_S) {
@@ -776,7 +774,6 @@ void tx_rf(RU_t *ru,int frame,int slot, uint64_t timestamp) {
           (long long unsigned int)timestamp,frame,proc->frame_tx_unwrap,slot);
     VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME( VCD_SIGNAL_DUMPER_FUNCTIONS_TRX_WRITE, 0 );
     AssertFatal(txs ==  siglen+sf_extension,"TX : Timeout (sent %d/%d)\n",txs, siglen);
-  }
 }
 
 
@@ -1385,9 +1382,9 @@ static void *ru_thread( void *param ) {
     }
 
     if (ru->if_south == LOCAL_RF) { // configure RF parameters only
-      fill_rf_config(ru,ru->rf_config_file);
       nr_init_frame_parms(&ru->gNB_list[0]->gNB_config, fp);
       nr_dump_frame_parms(fp);
+      fill_rf_config(ru,ru->rf_config_file);
       nr_phy_init_RU(ru);
       ret = openair0_device_load(&ru->rfdevice,&ru->openair0_cfg);
       AssertFatal(ret==0,"Cannot connect to local radio\n");

openair1/PHY/INIT/nr_init.c

@@ -19,6 +19,7 @@
  *      contact@openairinterface.org
  */
 
+#include "executables/nr-softmodem-common.h"
 #include "PHY/defs_gNB.h"
 #include "PHY/phy_extern.h"
 #include "PHY/NR_REFSIG/nr_refsig.h"
@@ -31,6 +32,7 @@
 #include "MBSFN-SubframeConfigList.h"*/
 #include "openair1/PHY/defs_RU.h"
 #include "LAYER2/MAC/mac_extern.h"
+#include "LAYER2/MAC/mac_proto.h"
 #include "assertions.h"
 #include <math.h>
 
@@ -428,23 +430,25 @@ void nr_phy_config_request(NR_PHY_Config_t *phy_config)
   gNB_config->sch_config.ssb_periodicity.value		    = phy_config->cfg->sch_config.ssb_periodicity.value;
 
   if (phy_config->cfg->subframe_config.duplex_mode.value == 0) {
-    gNB_config->subframe_config.duplex_mode.value    = TDD;
-  } else {
     gNB_config->subframe_config.duplex_mode.value    = FDD;
+  } else {
+    gNB_config->subframe_config.duplex_mode.value    = TDD;
   }
 
   RC.gNB[Mod_id][CC_id]->mac_enabled     = 1;
   fp->dl_CarrierFreq = from_nrarfcn(gNB_config->nfapi_config.rf_bands.rf_band[0],gNB_config->nfapi_config.nrarfcn.value);
-  fp->ul_CarrierFreq = fp->dl_CarrierFreq - (get_nr_uldl_offset(gNB_config->nfapi_config.rf_bands.rf_band[0])*100000);
+  get_band(fp->dl_CarrierFreq, &gNB_config->nfapi_config.rf_bands.rf_band[0], &uplink_frequency_offset[CC_id][0], &fp->frame_type);
+  fp->ul_CarrierFreq = fp->dl_CarrierFreq + uplink_frequency_offset[CC_id][0];
   fp->threequarter_fs                    = openair0_cfg[0].threequarter_fs;
-  LOG_I(PHY,"Configuring MIB for instance %d, CCid %d : (band %d,N_RB_DL %d, N_RB_UL %d, Nid_cell %d,DL freq %u)\n",
+  LOG_I(PHY,"Configuring MIB for instance %d, CCid %d : (band %d,N_RB_DL %d, N_RB_UL %d, Nid_cell %d,DL freq %u, UL freq %u)\n",
         Mod_id,
         CC_id,
         gNB_config->nfapi_config.rf_bands.rf_band[0],
         gNB_config->rf_config.dl_carrier_bandwidth.value,
         gNB_config->rf_config.ul_carrier_bandwidth.value,
         gNB_config->sch_config.physical_cell_id.value,
-        fp->dl_CarrierFreq );
+        fp->dl_CarrierFreq,
+        fp->ul_CarrierFreq);
 
   nr_init_frame_parms(gNB_config, fp);
 

openair1/PHY/INIT/nr_parms.c

@@ -256,7 +256,7 @@ int nr_init_frame_parms(nfapi_nr_config_request_t* config,
 {
 
   fp->eutra_band = config->nfapi_config.rf_bands.rf_band[0];
-  fp->frame_type = !(config->subframe_config.duplex_mode.value);
+  fp->frame_type = config->subframe_config.duplex_mode.value;
   fp->L_ssb = config->sch_config.ssb_scg_position_in_burst.value;
   return nr_init_frame_parms0(fp,
 			      config->subframe_config.numerology_index_mu.value,
@@ -288,6 +288,8 @@ void nr_dump_frame_parms(NR_DL_FRAME_PARMS *fp)
   LOG_I(PHY,"fp->samples_per_frame_wCP=%d\n",fp->samples_per_frame_wCP);
   LOG_I(PHY,"fp->samples_per_subframe=%d\n",fp->samples_per_subframe);
   LOG_I(PHY,"fp->samples_per_frame=%d\n",fp->samples_per_frame);
+  LOG_I(PHY,"fp->dl_CarrierFreq=%u\n",fp->dl_CarrierFreq);
+  LOG_I(PHY,"fp->ul_CarrierFreq=%u\n",fp->ul_CarrierFreq);
 }
 
 

openair1/PHY/NR_TRANSPORT/nr_ulsch_decoding.c

@@ -348,7 +348,7 @@ uint32_t nr_ulsch_decoding(PHY_VARS_gNB *phy_vars_gNB,
   // G = 0;
   // G = nr_get_G(nb_rb, nb_symb_sch, nb_re_dmrs, length_dmrs, nfapi_ulsch_pdu_rel15->Qm, nfapi_ulsch_pdu_rel15->n_layers);
 
-  LOG_I(PHY,"ULSCH Decoding, harq_pid %d TBS %d G %d mcs %d Nl %d nb_symb_sch %d nb_rb %d\n",harq_pid,A,G, mcs, n_layers, nb_symb_sch,nb_rb);
+  LOG_D(PHY,"ULSCH Decoding, harq_pid %d TBS %d G %d mcs %d Nl %d nb_symb_sch %d nb_rb %d\n",harq_pid,A,G, mcs, n_layers, nb_symb_sch,nb_rb);
 
   if (harq_process->round == 0) {
 

openair1/SCHED_NR/phy_procedures_nr_common.c

@@ -35,8 +35,10 @@
 nr_subframe_t nr_slot_select(nfapi_nr_config_request_t *cfg,
 		                     unsigned char slot)
 {
-  if (cfg->subframe_config.duplex_mode.value == FDD)
+  if (cfg->subframe_config.duplex_mode.value == FDD || slot == NR_DOWNLINK_SLOT)
     return(SF_DL);
-  LOG_E(PHY,"Not developped TDD mode\n");
+  else if (slot == NR_UPLINK_SLOT)
+    return (SF_UL);
+
   return -1;
 }

openair2/LAYER2/NR_MAC_gNB/nr_mac_common.c

@@ -75,30 +75,42 @@ void get_band(uint32_t downlink_frequency,
               lte_frame_type_t *current_type)
 {
     int ind;
-    int64_t dl_freq_khz = downlink_frequency/1000;
+    uint64_t center_frequency_khz;
+    uint64_t center_freq_diff_khz;
+    uint64_t dl_freq_khz = downlink_frequency/1000;
+
+    center_freq_diff_khz = 999999999999999999; // 2^64
+    *current_band = 0;
+
     for ( ind=0;
           ind < sizeof(nr_bandtable) / sizeof(nr_bandtable[0]);
           ind++) {
 
-      *current_band = nr_bandtable[ind].band;
-      LOG_I(PHY, "Scanning band %d, dl_min %"PRIu64", ul_min %"PRIu64"\n", ind, nr_bandtable[ind].dl_min,nr_bandtable[ind].ul_min);
+      LOG_I(PHY, "Scanning band %d, dl_min %"PRIu64", ul_min %"PRIu64"\n", nr_bandtable[ind].band, nr_bandtable[ind].dl_min,nr_bandtable[ind].ul_min);
 
       if ( nr_bandtable[ind].dl_min <= dl_freq_khz && nr_bandtable[ind].dl_max >= dl_freq_khz ) {
+
+        center_frequency_khz = (nr_bandtable[ind].dl_max + nr_bandtable[ind].dl_min)/2;
+
+        if (abs(dl_freq_khz - center_frequency_khz) < center_freq_diff_khz){
+
+          *current_band = nr_bandtable[ind].band;
 	        *current_offset = (nr_bandtable[ind].ul_min - nr_bandtable[ind].dl_min)*1000;
+          center_freq_diff_khz = abs(dl_freq_khz - center_frequency_khz);
+
 	        if (*current_offset == 0)
 	          *current_type = TDD;
 	        else
 	          *current_type = FDD;
-
-	LOG_I( PHY, "DL frequency %"PRIu32": band %d, frame_type %d, UL frequency %"PRIu32"\n",
-	       downlink_frequency, *current_band, *current_type, downlink_frequency+*current_offset);
-        break;
+        }
       }
     }
 
-    AssertFatal(ind != (sizeof(nr_bandtable) / sizeof(nr_bandtable[0])),
-	    "Can't find EUTRA band for frequency %d\n", downlink_frequency);
+    LOG_I( PHY, "DL frequency %"PRIu32": band %d, frame_type %d, UL frequency %"PRIu32"\n",
+         downlink_frequency, *current_band, *current_type, downlink_frequency+*current_offset);
 
+    AssertFatal(*current_band != 0,
+	    "Can't find EUTRA band for frequency %u\n", downlink_frequency);
 }
 
 uint32_t to_nrarfcn(int nr_bandP,