Fix PRACH msg1-FrequencyStart/k1

openair1/PHY/NR_TRANSPORT/nr_prach.c

@@ -171,9 +171,6 @@ void rx_nr_prach_ru(RU_t *ru,
 
   int16_t *prach[ru->nb_rx];
   int prach_sequence_length = ru->config.prach_config.prach_sequence_length.value;
-
-  int msg1_frequencystart   = ru->config.prach_config.num_prach_fd_occasions_list[numRA].k1.value;
-
   int sample_offset_slot = (prachStartSymbol==0?0:fp->ofdm_symbol_size*prachStartSymbol+fp->nb_prefix_samples0+fp->nb_prefix_samples*(prachStartSymbol-1));
   //to be checked for mu=0;
 
@@ -195,8 +192,7 @@ void rx_nr_prach_ru(RU_t *ru,
   int16_t *prach2;
 
   if (prach_sequence_length == 0) {
-    LOG_D(PHY,"PRACH (ru %d) in %d.%d, format %d, msg1_frequencyStart %d\n",
-	  ru->idx,frame,slot2,prachFormat,msg1_frequencystart);
+    LOG_D(PHY,"PRACH (ru %d) in %d.%d, format %d\n", ru->idx,frame,slot2,prachFormat);
     AssertFatal(prachFormat<4,"Illegal prach format %d for length 839\n",prachFormat);
     switch (prachFormat) {
     case 0:
@@ -218,8 +214,8 @@ void rx_nr_prach_ru(RU_t *ru,
     }
   }
   else {
-    LOG_D(PHY,"PRACH (ru %d) in %d.%d, format %s, msg1_frequencyStart %d,startSymbol %d\n",
-	  ru->idx,frame,slot,prachfmt[prachFormat],msg1_frequencystart,prachStartSymbol);
+    LOG_D(PHY,"PRACH (ru %d) in %d.%d, format %s,startSymbol %d\n",
+          ru->idx,frame,slot,prachfmt[prachFormat],prachStartSymbol);
 
     switch (prachFormat) {
     case 4: //A1
@@ -284,15 +280,15 @@ void rx_nr_prach_ru(RU_t *ru,
     K=1;
     kbar=2;
   }
-  int n_ra_prb            = msg1_frequencystart;
-  int k                   = (12*n_ra_prb) - 6*fp->N_RB_UL;
+
+  int k1 = (int16_t)ru->config.prach_config.num_prach_fd_occasions_list[numRA].k1.value;
 
   int N_ZC = (prach_sequence_length==0)?839:139;
 
-  if (k<0) k+=(fp->ofdm_symbol_size);
+  if (k1<0) k1+=(fp->ofdm_symbol_size);
 
-  k*=K;
-  k+=kbar;
+  k1*=K;
+  k1+=kbar;
 
   int reps=1;
 
@@ -653,7 +649,7 @@ void rx_nr_prach_ru(RU_t *ru,
     int16_t rxsigF_tmp[N_ZC<<1];
     //    if (k+N_ZC > dftlen) { // PRACH signal is split around DC 
     int16_t *rxsigF2=rxsigF[aa];
-    int k2=k<<1;
+    int k2=k1<<1;
 
     for (int j=0;j<N_ZC<<1;j++,k2++) {
       if (k2==(dftlen<<1)) k2=0;
@@ -685,7 +681,6 @@ void rx_nr_prach(PHY_VARS_gNB *gNB,
   uint16_t           rootSequenceIndex;  
   int                numrootSequenceIndex;
   uint8_t            restricted_set;
-  uint8_t            n_ra_prb=0xFF;
   int16_t            *prachF=NULL;
   int                nb_rx;
 
@@ -720,7 +715,6 @@ void rx_nr_prach(PHY_VARS_gNB *gNB,
   numrootSequenceIndex   = cfg->num_prach_fd_occasions_list[prach_pdu->num_ra].num_root_sequences.value;
   NCS          = prach_pdu->num_cs;//cfg->num_prach_fd_occasions_list[0].prach_zero_corr_conf.value;
   int prach_sequence_length = cfg->prach_sequence_length.value;
-  int msg1_frequencystart   = cfg->num_prach_fd_occasions_list[prach_pdu->num_ra].k1.value;
   //  int num_unused_root_sequences = cfg->num_prach_fd_occasions_list[0].num_unused_root_sequences.value;
   // cfg->num_prach_fd_occasions_list[0].unused_root_sequences_list
 
@@ -734,7 +728,8 @@ void rx_nr_prach(PHY_VARS_gNB *gNB,
   prach_ifft        = gNB->prach_vars.prach_ifft;
   prachF            = gNB->prach_vars.prachF;
   if (LOG_DEBUGFLAG(PRACH)){
-    if ((frame&1023) < 20) LOG_D(PHY,"PRACH (gNB) : running rx_prach for subframe %d, msg1_frequencystart %d, rootSequenceIndex %d\n", subframe,msg1_frequencystart,rootSequenceIndex);
+    if ((frame&1023) < 20) LOG_D(PHY,"PRACH (gNB) : running rx_prach for subframe %d, rootSequenceIndex %d\n",
+                                 subframe, rootSequenceIndex);
   }
 
   start_meas(&gNB->rx_prach);
@@ -936,14 +931,13 @@ void rx_nr_prach(PHY_VARS_gNB *gNB,
   if (LOG_DUMPFLAG(PRACH)) {
     //int en = dB_fixed(signal_energy((int32_t*)&rxsigF[0][0],840));
     //    if (en>60) {
-      int k = (12*n_ra_prb) - 6*fp->N_RB_UL;
-      
-      if (k<0) k+=fp->ofdm_symbol_size;
+      int k1 = (int16_t)cfg->num_prach_fd_occasions_list[prach_pdu->num_ra].k1.value;
       
-      k*=12;
-      k+=13;
-      k*=2;
+      if (k1<0) k1+=fp->ofdm_symbol_size;
       
+      k1*=12;
+      k1+=13;
+      k1*=2;
 
       LOG_M("rxsigF.m","prach_rxF",&rxsigF[0][0],12288,1,1);
       LOG_M("prach_rxF_comp0.m","prach_rxF_comp0",prachF,1024,1,1);

openair1/PHY/NR_UE_TRANSPORT/nr_prach.c

@@ -71,7 +71,7 @@ int32_t generate_nr_prach(PHY_VARS_NR_UE *ue, uint8_t gNB_id, uint8_t slot){
 
   int16_t Ncp = 0, amp, *prach, *prach2, *prachF, *Xu;
   int32_t Xu_re, Xu_im;
-  int prach_start, prach_sequence_length, i, prach_len, dftlen, mu, kbar, K, n_ra_prb, k, prachStartSymbol, sample_offset_slot;
+  int prach_start, prach_sequence_length, i, prach_len, dftlen, mu, kbar, K, k1, prachStartSymbol, sample_offset_slot;
   //int restricted_Type;
 
   prach                   = prach_tmp;
@@ -83,7 +83,6 @@ int32_t generate_nr_prach(PHY_VARS_NR_UE *ue, uint8_t gNB_id, uint8_t slot){
   mu                      = nrUE_config->prach_config.prach_sub_c_spacing;
   restricted_set          = prach_pdu->restricted_set;
   rootSequenceIndex       = prach_pdu->root_seq_id;
-  n_ra_prb                = prach_pdu->freq_msg1;
   NCS                     = prach_pdu->num_cs;
   prach_fmt_id            = prach_pdu->prach_format;
   preamble_index          = prach_resources->ra_PreambleIndex;
@@ -93,7 +92,7 @@ int32_t generate_nr_prach(PHY_VARS_NR_UE *ue, uint8_t gNB_id, uint8_t slot){
   first_nonzero_root_idx  = 0;
   kbar                    = 1;
   K                       = 24;
-  k                       = 12*n_ra_prb - 6*fp->N_RB_UL;
+  k1                       = (int16_t)prach_pdu->freq_msg1;
   prachStartSymbol        = prach_pdu->prach_start_symbol;
   //restricted_Type         = 0;
 
@@ -185,7 +184,7 @@ int32_t generate_nr_prach(PHY_VARS_NR_UE *ue, uint8_t gNB_id, uint8_t slot){
   // now generate PRACH signal
 #ifdef NR_PRACH_DEBUG
     if (NCS>0)
-      LOG_I(PHY, "PRACH [UE %d] generate PRACH in slot %d for RootSeqIndex %d, Preamble Index %d, PRACH Format %s, NCS %d (N_ZC %d): Preamble_offset %d, Preamble_shift %d msg1 frequency start %d\n",
+      LOG_I(PHY, "PRACH [UE %d] generate PRACH in slot %d for RootSeqIndex %d, Preamble Index %d, PRACH Format %s, NCS %d (N_ZC %d): Preamble_offset %d, Preamble_shift %dn",
         Mod_id,
         slot,
         rootSequenceIndex,
@@ -194,8 +193,7 @@ int32_t generate_nr_prach(PHY_VARS_NR_UE *ue, uint8_t gNB_id, uint8_t slot){
         NCS,
         N_ZC,
         preamble_offset,
-        preamble_shift,
-        n_ra_prb);
+        preamble_shift);
   #endif
 
   //  nsymb = (frame_parms->Ncp==0) ? 14:12;
@@ -209,17 +207,16 @@ int32_t generate_nr_prach(PHY_VARS_NR_UE *ue, uint8_t gNB_id, uint8_t slot){
     kbar = 2;
   }
 
-  if (k<0)
-    k += fp->ofdm_symbol_size;
+  if (k1<0)
+    k1 += fp->ofdm_symbol_size;
 
-  k *= K;
-  k += kbar;
-  k *= 2;
+  k1 *= K;
+  k1 += kbar;
+  k1 *= 2;
 
-  LOG_I(PHY, "PRACH [UE %d] in slot %d, placing PRACH in position %d, msg1 frequency start %d, preamble_offset %d, first_nonzero_root_idx %d\n", Mod_id,
+  LOG_I(PHY, "PRACH [UE %d] in slot %d, placing PRACH in position %d, preamble_offset %d, first_nonzero_root_idx %d\n", Mod_id,
     slot,
-    k,
-    n_ra_prb,
+    k1,
     preamble_offset,
     first_nonzero_root_idx);
 
@@ -344,10 +341,10 @@ int32_t generate_nr_prach(PHY_VARS_NR_UE *ue, uint8_t gNB_id, uint8_t slot){
 
     Xu_re = (((int32_t)Xu[offset<<1]*amp)>>15);
     Xu_im = (((int32_t)Xu[1+(offset<<1)]*amp)>>15);
-    prachF[k++]= ((Xu_re*nr_ru[offset2<<1]) - (Xu_im*nr_ru[1+(offset2<<1)]))>>15;
-    prachF[k++]= ((Xu_im*nr_ru[offset2<<1]) + (Xu_re*nr_ru[1+(offset2<<1)]))>>15;
+    prachF[k1++]= ((Xu_re*nr_ru[offset2<<1]) - (Xu_im*nr_ru[1+(offset2<<1)]))>>15;
+    prachF[k1++]= ((Xu_im*nr_ru[offset2<<1]) + (Xu_re*nr_ru[1+(offset2<<1)]))>>15;
 
-    if (k==dftlen) k=0;
+    if (k1==dftlen) k1=0;
   }
 
   #if defined (PRACH_WRITE_OUTPUT_DEBUG)

openair2/LAYER2/NR_MAC_UE/config_ue.c

@@ -31,6 +31,7 @@
  */
 
 //#include "mac_defs.h"
+#include <NR_MAC_gNB/mac_proto.h>
 #include "NR_MAC_UE/mac_proto.h"
 #include "NR_MAC-CellGroupConfig.h"
 #include "LAYER2/NR_MAC_COMMON/nr_mac_common.h"
@@ -309,8 +310,11 @@ void config_common_ue(NR_UE_MAC_INST_t *mac,
       cfg->prach_config.num_prach_fd_occasions_list[i].prach_root_sequence_index = scc->uplinkConfigCommon->initialUplinkBWP->rach_ConfigCommon->choice.setup->prach_RootSequenceIndex.choice.l139; 
     else
       cfg->prach_config.num_prach_fd_occasions_list[i].prach_root_sequence_index = scc->uplinkConfigCommon->initialUplinkBWP->rach_ConfigCommon->choice.setup->prach_RootSequenceIndex.choice.l839;
-
-    cfg->prach_config.num_prach_fd_occasions_list[i].k1 = scc->uplinkConfigCommon->initialUplinkBWP->rach_ConfigCommon->choice.setup->rach_ConfigGeneric.msg1_FrequencyStart;
+    cfg->prach_config.num_prach_fd_occasions_list[i].k1 =
+        (NRRIV2PRBOFFSET(scc->uplinkConfigCommon->initialUplinkBWP->genericParameters.locationAndBandwidth, MAX_BWP_SIZE) +
+        scc->uplinkConfigCommon->initialUplinkBWP->rach_ConfigCommon->choice.setup->rach_ConfigGeneric.msg1_FrequencyStart +
+        (get_N_RA_RB(cfg->prach_config.prach_sub_c_spacing, scc->uplinkConfigCommon->frequencyInfoUL->scs_SpecificCarrierList.list.array[0]->subcarrierSpacing ) * i))*12 -
+        6*scc->uplinkConfigCommon->frequencyInfoUL->scs_SpecificCarrierList.list.array[0]->carrierBandwidth;
     cfg->prach_config.num_prach_fd_occasions_list[i].prach_zero_corr_conf = scc->uplinkConfigCommon->initialUplinkBWP->rach_ConfigCommon->choice.setup->rach_ConfigGeneric.zeroCorrelationZoneConfig;
     cfg->prach_config.num_prach_fd_occasions_list[i].num_root_sequences = compute_nr_root_seq(scc->uplinkConfigCommon->initialUplinkBWP->rach_ConfigCommon->choice.setup, nb_preambles, mac->frame_type, frequency_range);
     //cfg->prach_config.num_prach_fd_occasions_list[i].num_unused_root_sequences = ???

openair2/LAYER2/NR_MAC_gNB/config.c

@@ -208,8 +208,11 @@ void config_common(int Mod_idP, int pdsch_AntennaPorts, NR_ServingCellConfigComm
       cfg->prach_config.num_prach_fd_occasions_list[i].prach_root_sequence_index.value = scc->uplinkConfigCommon->initialUplinkBWP->rach_ConfigCommon->choice.setup->prach_RootSequenceIndex.choice.l839;
     cfg->prach_config.num_prach_fd_occasions_list[i].prach_root_sequence_index.tl.tag = NFAPI_NR_CONFIG_PRACH_ROOT_SEQUENCE_INDEX_TAG;
     cfg->num_tlv++;
-    cfg->prach_config.num_prach_fd_occasions_list[i].k1.value = scc->uplinkConfigCommon->initialUplinkBWP->rach_ConfigCommon->choice.setup->rach_ConfigGeneric.msg1_FrequencyStart + (get_N_RA_RB( cfg->prach_config.prach_sub_c_spacing.value, scc->uplinkConfigCommon->frequencyInfoUL->scs_SpecificCarrierList.list.array[0]->subcarrierSpacing ) * i);
-//k1= msg1_FrequencyStart + 12 (no. of FDM)(RB for PRACH occasion);
+    cfg->prach_config.num_prach_fd_occasions_list[i].k1.value =
+        (NRRIV2PRBOFFSET(scc->uplinkConfigCommon->initialUplinkBWP->genericParameters.locationAndBandwidth, MAX_BWP_SIZE) +
+        scc->uplinkConfigCommon->initialUplinkBWP->rach_ConfigCommon->choice.setup->rach_ConfigGeneric.msg1_FrequencyStart +
+        (get_N_RA_RB(cfg->prach_config.prach_sub_c_spacing.value, scc->uplinkConfigCommon->frequencyInfoUL->scs_SpecificCarrierList.list.array[0]->subcarrierSpacing ) * i))*12 -
+        6*scc->uplinkConfigCommon->frequencyInfoUL->scs_SpecificCarrierList.list.array[0]->carrierBandwidth;
     cfg->prach_config.num_prach_fd_occasions_list[i].k1.tl.tag = NFAPI_NR_CONFIG_K1_TAG;
     cfg->num_tlv++;
     cfg->prach_config.num_prach_fd_occasions_list[i].prach_zero_corr_conf.value = scc->uplinkConfigCommon->initialUplinkBWP->rach_ConfigCommon->choice.setup->rach_ConfigGeneric.zeroCorrelationZoneConfig;