fixing prach config for FR2

openair2/LAYER2/NR_MAC_COMMON/nr_mac_common.c

@@ -936,14 +936,22 @@ int64_t table_6_3_3_2_4_prachConfig_Index [256][10] = {
 
 
 int get_format0(uint8_t index,
-                uint8_t unpaired){
+                uint8_t unpaired,
+		frequency_range_t frequency_range){
 
   uint16_t format;
-  if (unpaired)
+  if (unpaired) {
-    format = table_6_3_3_2_3_prachConfig_Index[index][0];
+    if (frequency_range==FR1)
-  else
+      format = table_6_3_3_2_3_prachConfig_Index[index][0];
-    format = table_6_3_3_2_2_prachConfig_Index[index][0];
+    else
-
+      format = table_6_3_3_2_4_prachConfig_Index[index][0];
+  }
+  else {
+    if (frequency_range==FR1)
+      format = table_6_3_3_2_2_prachConfig_Index[index][0];
+    else
+      AssertFatal(0==1,"no paired spectrum for FR2\n");
+  }
   return format;
 }
 
@@ -1401,11 +1409,12 @@ uint16_t table_63313[838] = {
 
 uint8_t compute_nr_root_seq(NR_RACH_ConfigCommon_t *rach_config,
                             uint8_t nb_preambles,
-                            uint8_t unpaired) {
+                            uint8_t unpaired,
+			    frequency_range_t frequency_range) {
 
   uint8_t config_index = rach_config->rach_ConfigGeneric.prach_ConfigurationIndex;
   uint8_t ncs_index = rach_config->rach_ConfigGeneric.zeroCorrelationZoneConfig;
-  uint16_t format0 = get_format0(config_index, unpaired);
+  uint16_t format0 = get_format0(config_index, unpaired, frequency_range);
   uint16_t NCS = get_NCS(ncs_index, format0, rach_config->restrictedSetConfig);
   uint16_t L_ra = (rach_config->prach_RootSequenceIndex.present==NR_RACH_ConfigCommon__prach_RootSequenceIndex_PR_l139) ? 139 : 839;
   uint16_t r,u,index,q,d_u,n_shift_ra,n_shift_ra_bar,d_start;

openair2/LAYER2/NR_MAC_COMMON/nr_mac_common.h

@@ -44,6 +44,11 @@
 #define MAX_TDM (7) // Maximum nb of PRACH occasions TDMed in a slot
 #define MAX_FDM (8) // Maximum nb of PRACH occasions FDMed in a slot
 
+typedef enum frequency_range_e {
+    FR1 = 0, 
+    FR2
+} frequency_range_t;
+
 // PRACH occasion details
 typedef struct prach_occasion_info {
   uint8_t start_symbol; // 0 - 13 (14 symbols in a slot)
@@ -157,11 +162,12 @@ uint8_t get_pusch_mcs_table(long *mcs_Table,
 
 uint8_t compute_nr_root_seq(NR_RACH_ConfigCommon_t *rach_config,
                             uint8_t nb_preambles,
-                            uint8_t unpaired);
+                            uint8_t unpaired,
+			    frequency_range_t);
 
 int ul_ant_bits(NR_DMRS_UplinkConfig_t *NR_DMRS_UplinkConfig,long transformPrecoder);
 
-int get_format0(uint8_t index, uint8_t unpaired);
+int get_format0(uint8_t index, uint8_t unpaired,frequency_range_t);
 
 int64_t *get_prach_config_info(uint32_t pointa,
                                uint8_t index,

openair2/LAYER2/NR_MAC_UE/mac_defs.h

@@ -292,10 +292,6 @@ typedef enum channel_bandwidth_e {
     bw_100MHz = 0x32
 } channel_bandwidth_t;
 
-typedef enum frequency_range_e {
-    FR1 = 0, 
-    FR2
-} frequency_range_t;
 
 typedef struct {
   uint8_t identifier_dci_formats          ; // 0  IDENTIFIER_DCI_FORMATS:

openair2/LAYER2/NR_MAC_gNB/config.c

@@ -127,11 +127,13 @@ void config_common(int Mod_idP, int pdsch_AntennaPorts, NR_ServingCellConfigComm
   lte_frame_type_t frame_type;
   uint16_t band;
   int32_t offset;
-
+  frequency_range_t frequency_range;
+  
   get_band(((uint64_t)cfg->carrier_config.dl_frequency.value)*1000,
            &band,
            &offset,
            &frame_type);
+  frequency_range = band<100?FR1:FR2;
 
   RC.nrmac[Mod_idP]->common_channels[0].frame_type = frame_type;
 
@@ -220,7 +222,7 @@ void config_common(int Mod_idP, int pdsch_AntennaPorts, NR_ServingCellConfigComm
     cfg->prach_config.num_prach_fd_occasions_list[i].prach_zero_corr_conf.value = scc->uplinkConfigCommon->initialUplinkBWP->rach_ConfigCommon->choice.setup->rach_ConfigGeneric.zeroCorrelationZoneConfig;
     cfg->prach_config.num_prach_fd_occasions_list[i].prach_zero_corr_conf.tl.tag = NFAPI_NR_CONFIG_PRACH_ZERO_CORR_CONF_TAG;
     cfg->num_tlv++;
-    cfg->prach_config.num_prach_fd_occasions_list[i].num_root_sequences.value = compute_nr_root_seq(scc->uplinkConfigCommon->initialUplinkBWP->rach_ConfigCommon->choice.setup,nb_preambles, frame_type);
+    cfg->prach_config.num_prach_fd_occasions_list[i].num_root_sequences.value = compute_nr_root_seq(scc->uplinkConfigCommon->initialUplinkBWP->rach_ConfigCommon->choice.setup,nb_preambles, frame_type, frequency_range);
     cfg->prach_config.num_prach_fd_occasions_list[i].num_root_sequences.tl.tag = NFAPI_NR_CONFIG_NUM_ROOT_SEQUENCES_TAG;
     cfg->num_tlv++;
     cfg->prach_config.num_prach_fd_occasions_list[i].num_unused_root_sequences.value = 1;

targets/PROJECTS/GENERIC-LTE-EPC/CONF/gnb.band261.tm1.32PRB.usrpn300.conf

@@ -47,7 +47,7 @@ gNBs =
         dl_carrierBandwidth                                            = 32;
      #initialDownlinkBWP
       #genericParameters
-        # this is RBstart=0,L=50 (275*(L-1))+RBstart
+        # this is RBstart=0,L=32 (275*(L-1))+RBstart
         initialDLBWPlocationAndBandwidth                                        = 8525;
 # subcarrierSpacing
 # 0=kHz15, 1=kHz30, 2=kHz60, 3=kHz120  
@@ -121,8 +121,8 @@ gNBs =
         ra_ContentionResolutionTimer                                = 7;
         rsrp_ThresholdSSB                                           = 19;
 #prach-RootSequenceIndex_PR
-#0 = 839, 1 = 139
+#1 = 839, 2 = 139
-        prach_RootSequenceIndex_PR                                  = 1;
+        prach_RootSequenceIndex_PR                                  = 2;
         prach_RootSequenceIndex                                     = 1;
         # SCS for msg1, can only be 15 for 30 kHz < 6 GHz, takes precendence over the one derived from prach-ConfigIndex
         #  
@@ -211,7 +211,7 @@ gNBs =
                           );
 
     ///X2
-    enable_x2 = "yes";
+    enable_x2 = "no";
     t_reloc_prep      = 1000;      /* unit: millisecond */
     tx2_reloc_overall = 2000;      /* unit: millisecond */
     t_dc_prep         = 1000;      /* unit: millisecond */