Merge remote-tracking branch 'origin/NR_CSIRS_tomerge' into integration_2021_wk30

doc/FEATURE_SET.md

@@ -283,7 +283,7 @@ The following features are valid for the gNB and the 5G-NR UE.
    - PTRS support
    - Support for 1, 2 and 4 TX antennas
    - Support for up to 2 layers (currently limited to DMRS configuration type 2)
-*  NR-CSI Generation of sequence at PHY (**under integration**)
+*  NR-CSIRS Generation of sequence at PHY
 *  NR-PUSCH (including Segmentation, LDPC encoding, rate matching, scrambling, modulation, RB mapping, etc).
    - PUSCH mapping type A and B
    - DMRS configuration type 1 and 2
@@ -319,6 +319,7 @@ The following features are valid for the gNB and the 5G-NR UE.
 - MAC <-> PHY data interface using FAPI P7 interface for BCH PDU, DCI PDU, PDSCH PDU
 - Scheduler procedures for SIB1
 - Scheduler procedures for RA
+- Scheduler procedures for CSI-RS
 - MAC downlink scheduler (fixed allocations)
 - MAC header generation (including timing advance)
 - ACK / NACK handling and HARQ procedures for downlink
@@ -349,7 +350,6 @@ The following features are valid for the gNB and the 5G-NR UE.
    - PTRS support
    - Support for 1, 2 and 4 RX antennas
    - Support for up to 2 layers (currently limited to DMRS configuration type 2)
-*  NR-CSI Generation of sequence at PHY (**under integration**)
 *  NR-PUSCH (including Segmentation, LDPC encoding, rate matching, scrambling, modulation, RB mapping, etc).
    - PUSCH mapping type A and B
    - DMRS configuration type 1 and 2

nfapi/open-nFAPI/nfapi/public_inc/nfapi_nr_interface_scf.h

@@ -1571,8 +1571,7 @@ typedef struct
 {
   uint8_t  csi_part1_crc;
   uint16_t csi_part1_bit_len;
-  //! fixme
-  uint8_t*  csi_part1_payload;//uint8_t[ceil(csiPart1BitLen/8)]
+  uint8_t*  csi_part1_payload;
   
 } nfapi_nr_csi_part1_pdu_t;
 
@@ -1581,8 +1580,7 @@ typedef struct
 {
   uint8_t  csi_part2_crc;
   uint16_t csi_part2_bit_len;
-  //! fixme
-  uint8_t*  csi_part2_payload;//uint8_t[ceil(csiPart2BitLen/8)]
+  uint8_t*  csi_part2_payload;
 } nfapi_nr_csi_part2_pdu_t;
 
 //table 3-63

openair1/PHY/INIT/nr_init.c

@@ -227,16 +227,14 @@ int phy_init_nr_gNB(PHY_VARS_gNB *gNB,
     }
   }
 
+  nr_init_csi_rs(gNB, cfg->cell_config.phy_cell_id.value);
+
   /* Generate low PAPR type 1 sequences for PUSCH DMRS, these are used if transform precoding is enabled.  */
   generate_lowpapr_typ1_refsig_sequences(SHRT_MAX);
-  
-
-  nr_init_csi_rs(gNB, 0); // TODO scramblingID currently hardcoded to 0, to be taken from higher layer parameter scramblingID when implemented
 
   /// Transport init necessary for NR synchro
   init_nr_transport(gNB);
 
-
   gNB->first_run_I0_measurements = 1;
 
   common_vars->rxdata  = (int32_t **)malloc16(Prx*sizeof(int32_t*));

openair1/PHY/NR_REFSIG/nr_gold.c

@@ -145,7 +145,7 @@ void nr_init_csi_rs(PHY_VARS_gNB* gNB, uint32_t Nid)
       reset = 1;
       x2 = ((1<<10) * (fp->symbols_per_slot*slot+symb+1) * ((Nid<<1)+1) + (Nid));
 
-      for (uint32_t n=0; n<NR_MAX_PDCCH_DMRS_INIT_LENGTH_DWORD; n++) {
+      for (uint32_t n=0; n<NR_MAX_CSI_RS_INIT_LENGTH_DWORD; n++) {
         csi_rs[slot][symb][n] = lte_gold_generic(&x1, &x2, reset);
         reset = 0;
       }

openair1/PHY/NR_TRANSPORT/nr_csi_rs.c

@@ -22,17 +22,22 @@
 
 #include "PHY/NR_TRANSPORT/nr_transport_proto.h"
 #include "PHY/MODULATION/nr_modulation.h"
+#include "PHY/NR_REFSIG/nr_refsig.h"
 
 //#define NR_CSIRS_DEBUG
 
-int nr_generate_csi_rs(uint32_t **gold_csi_rs,
-                       int32_t** txdataF,
-                       int16_t amp,
-                       NR_DL_FRAME_PARMS frame_parms,
-                       nfapi_nr_dl_tti_csi_rs_pdu_rel15_t csi_params)
-{
 
-  int16_t mod_csi[frame_parms.symbols_per_slot][NR_MAX_CSI_RS_LENGTH>>1];
+void nr_generate_csi_rs(PHY_VARS_gNB *gNB,
+                        int16_t amp,
+                        nfapi_nr_dl_tti_csi_rs_pdu_rel15_t csi_params,
+                        uint16_t cell_id,
+                        int slot){
+
+  NR_DL_FRAME_PARMS frame_parms=gNB->frame_parms;
+  int32_t **txdataF = gNB->common_vars.txdataF;
+  int txdataF_offset = (slot%2)*frame_parms.samples_per_slot_wCP;
+  uint32_t **gold_csi_rs = gNB->nr_gold_csi_rs[slot];
+  int16_t mod_csi[frame_parms.symbols_per_slot][NR_MAX_CSI_RS_LENGTH>>1] __attribute__((aligned(16)));;
   uint16_t b = csi_params.freq_domain;
   uint16_t n, csi_bw, csi_start, p, k, l, mprime, na, kpn, csi_length;
   uint8_t size, ports, kprime, lprime, i, gs;
@@ -45,6 +50,22 @@ int nr_generate_csi_rs(uint32_t **gold_csi_rs,
 
   AssertFatal(b!=0, "Invalid CSI frequency domain mapping: no bit selected in bitmap\n");
 
+  // pre-computed for scrambling id equel to cell id
+  // if the scrambling id is not the cell id we need to re-initialize the rs
+  if (csi_params.scramb_id != cell_id) {
+    uint8_t reset;
+    uint32_t x1, x2;
+    uint32_t Nid = csi_params.scramb_id;
+    for (uint8_t symb=0; symb<frame_parms.symbols_per_slot; symb++) {
+      reset = 1;
+      x2 = ((1<<10) * (frame_parms.symbols_per_slot*slot+symb+1) * ((Nid<<1)+1) + (Nid));
+      for (uint32_t n=0; n<NR_MAX_CSI_RS_INIT_LENGTH_DWORD; n++) {
+        gold_csi_rs[symb][n] = lte_gold_generic(&x1, &x2, reset);
+        reset = 0;
+      }
+    }
+  }
+
   switch (csi_params.row) {
   // implementation of table 7.4.1.5.3-1 of 38.211
   // lprime and kprime are the max value of l' and k'
@@ -495,12 +516,12 @@ int nr_generate_csi_rs(uint32_t **gold_csi_rs,
 
   if (rho < 1) {
     if (csi_params.freq_density == 0)
-      csi_length = (((csi_bw + csi_start)>>1)<<kprime)<<1; 
+      csi_length = (((csi_bw + csi_start)>>1)<<kprime)<<1;
     else
       csi_length = ((((csi_bw + csi_start)>>1)<<kprime)+1)<<1;
   }
   else
-    csi_length = (((uint16_t) rho*(csi_bw + csi_start))<<kprime)<<1; 
+    csi_length = (((uint16_t) rho*(csi_bw + csi_start))<<kprime)<<1;
 
 #ifdef NR_CSIRS_DEBUG
     printf(" start rb %d, n. rbs %d, csi length %d\n",csi_start,csi_bw,csi_length);
@@ -514,41 +535,36 @@ int nr_generate_csi_rs(uint32_t **gold_csi_rs,
 
   // NZP CSI RS
   if (csi_params.csi_type == 1) {
-   // assuming amp is the amplitude of SSB channels
-   switch (csi_params.power_control_offset_ss) {
-   case 0:
-    beta = (amp*ONE_OVER_SQRT2_Q15)>>15;
-    break;
-  
-   case 1:
-    beta = amp;
-    break;
-
-   case 2:
-    beta = (amp*ONE_OVER_SQRT2_Q15)>>14;
-    break;
-
-   case 3:
-    beta = amp<<1;
-    break;
-
-  default:
-    AssertFatal(0==1, "Invalid SS power offset density index for CSI\n");
-   }
-
-   for (lp=0; lp<=lprime; lp++){
-     symb = csi_params.symb_l0;
-     nr_modulation(gold_csi_rs[symb+lp], csi_length, DMRS_MOD_ORDER, mod_csi[symb+lp]);
-     if ((csi_params.row == 5) || (csi_params.row == 7) || (csi_params.row == 11) || (csi_params.row == 13) || (csi_params.row == 16))
-       nr_modulation(gold_csi_rs[symb+1], csi_length, DMRS_MOD_ORDER, mod_csi[symb+1]); 
-     if ((csi_params.row == 14) || (csi_params.row == 13) || (csi_params.row == 16) || (csi_params.row == 17)) {
-       symb = csi_params.symb_l1;
-       nr_modulation(gold_csi_rs[symb+lp], csi_length, DMRS_MOD_ORDER, mod_csi[symb+lp]);
-       if ((csi_params.row == 13) || (csi_params.row == 16))
-         nr_modulation(gold_csi_rs[symb+1], csi_length, DMRS_MOD_ORDER, mod_csi[symb+1]); 
-     }
-   }
-      
+    // assuming amp is the amplitude of SSB channels
+    switch (csi_params.power_control_offset_ss) {
+    case 0:
+      beta = (amp*ONE_OVER_SQRT2_Q15)>>15;
+      break;
+    case 1:
+      beta = amp;
+      break;
+    case 2:
+      beta = (amp*ONE_OVER_SQRT2_Q15)>>14;
+      break;
+    case 3:
+      beta = amp<<1;
+      break;
+    default:
+      AssertFatal(0==1, "Invalid SS power offset density index for CSI\n");
+    }
+
+    for (lp=0; lp<=lprime; lp++){
+      symb = csi_params.symb_l0;
+      nr_modulation(gold_csi_rs[symb+lp], csi_length, DMRS_MOD_ORDER, mod_csi[symb+lp]);
+      if ((csi_params.row == 5) || (csi_params.row == 7) || (csi_params.row == 11) || (csi_params.row == 13) || (csi_params.row == 16))
+        nr_modulation(gold_csi_rs[symb+1], csi_length, DMRS_MOD_ORDER, mod_csi[symb+1]);
+      if ((csi_params.row == 14) || (csi_params.row == 13) || (csi_params.row == 16) || (csi_params.row == 17)) {
+        symb = csi_params.symb_l1;
+        nr_modulation(gold_csi_rs[symb+lp], csi_length, DMRS_MOD_ORDER, mod_csi[symb+lp]);
+        if ((csi_params.row == 13) || (csi_params.row == 16))
+          nr_modulation(gold_csi_rs[symb+1], csi_length, DMRS_MOD_ORDER, mod_csi[symb+1]);
+      }
+    }
   }
 
   uint16_t start_sc = frame_parms.first_carrier_offset;
@@ -586,16 +602,17 @@ int nr_generate_csi_rs(uint32_t **gold_csi_rs,
             }
             // ZP CSI RS
             if (csi_params.csi_type == 2) {
-              ((int16_t*)txdataF[p])[(l*frame_parms.ofdm_symbol_size + k)<<1] = 0;
-              ((int16_t*)txdataF[p])[((l*frame_parms.ofdm_symbol_size + k)<<1) + 1] = 0;
+              ((int16_t*)txdataF[p])[((l*frame_parms.ofdm_symbol_size + k)<<1)+(2*txdataF_offset)] = 0;
+              ((int16_t*)txdataF[p])[((l*frame_parms.ofdm_symbol_size + k)<<1)+1+(2*txdataF_offset)] = 0;
             }
             else {
-              ((int16_t*)txdataF[p])[(l*frame_parms.ofdm_symbol_size + k)<<1] = (beta*wt*wf*mod_csi[l][mprime<<1]) >> 15;
-              ((int16_t*)txdataF[p])[((l*frame_parms.ofdm_symbol_size + k)<<1) + 1] = (beta*wt*wf*mod_csi[l][(mprime<<1) + 1]) >> 15;
+              ((int16_t*)txdataF[p])[((l*frame_parms.ofdm_symbol_size + k)<<1)+(2*txdataF_offset)] = (beta*wt*wf*mod_csi[l][mprime<<1]) >> 15;
+              ((int16_t*)txdataF[p])[((l*frame_parms.ofdm_symbol_size + k)<<1)+1+(2*txdataF_offset)] = (beta*wt*wf*mod_csi[l][(mprime<<1) + 1]) >> 15;
             }
 #ifdef NR_CSIRS_DEBUG
-            printf("l,k (%d %d)  seq. index %d \t port %d \t (%d,%d)\n",l,k-start_sc,mprime,p+3000,((int16_t*)txdataF[p])[(l*frame_parms.ofdm_symbol_size + k)<<1],
-               ((int16_t*)txdataF[p])[((l*frame_parms.ofdm_symbol_size + k)<<1) + 1]);
+            printf("l,k (%d %d)  seq. index %d \t port %d \t (%d,%d)\n",l,k,mprime,p+3000,
+                   ((int16_t*)txdataF[p])[((l*frame_parms.ofdm_symbol_size + k)<<1)+(2*txdataF_offset)],
+                   ((int16_t*)txdataF[p])[((l*frame_parms.ofdm_symbol_size + k)<<1)+1+(2*txdataF_offset)]);
 #endif
           }
         }
@@ -603,6 +620,4 @@ int nr_generate_csi_rs(uint32_t **gold_csi_rs,
     }
    }
   } 
-
-  return 0;
 }

openair1/PHY/NR_TRANSPORT/nr_transport_proto.h

@@ -326,11 +326,11 @@ void init_prach_list(PHY_VARS_gNB *gNB);
 void init_prach_ru_list(RU_t *ru);
 void free_nr_ru_prach_entry(RU_t *ru, int prach_id);
 
-int nr_generate_csi_rs(uint32_t **gold_csi_rs,
-                       int32_t **txdataF,
-                       int16_t amp,
-                       NR_DL_FRAME_PARMS frame_parms,
-                       nfapi_nr_dl_tti_csi_rs_pdu_rel15_t csi_params);
+void nr_generate_csi_rs(PHY_VARS_gNB *gNB,
+                        int16_t amp,
+                        nfapi_nr_dl_tti_csi_rs_pdu_rel15_t csi_params,
+                        uint16_t cell_id,
+                        int slot);
 
 void free_nr_prach_entry(PHY_VARS_gNB *gNB, int prach_id);
 

openair1/PHY/NR_TRANSPORT/pucch_rx.c

@@ -289,7 +289,7 @@ void nr_decode_pucch0(PHY_VARS_gNB *gNB,
 
   int32_t corr_re[2];
   int32_t corr_im[2];
-  //int32_t no_corr = 0;
+
   int seq_index;
   int64_t temp;
   int64_t av_corr=0;
@@ -1375,7 +1375,7 @@ void nr_decode_pucch2(PHY_VARS_gNB *gNB,
       rp2_im[aa] = (__m256i*)r_im_ext2[aa];
     }
     __m256i prod_re[Prx2],prod_im[Prx2];
-    int64_t corr=0;
+    uint64_t corr=0;
     int cw_ML=0;
     
     
@@ -1389,7 +1389,7 @@ void nr_decode_pucch2(PHY_VARS_gNB *gNB,
       }
       printf("\n");
 #endif
-      int64_t corr_tmp = 0;
+      uint64_t corr_tmp = 0;
 
       for (int group=0;group<ngroup;group++) {
 	// do complex correlation
@@ -1421,8 +1421,8 @@ void nr_decode_pucch2(PHY_VARS_gNB *gNB,
 	  prod_im[aa] = _mm256_hadds_epi16(prod_im[aa],prod_im[aa]);
 	}
 	int64_t corr_re=0,corr_im=0;
-	
-	
+
+
 	for (int aa=0;aa<Prx;aa++) {
 	  LOG_D(PHY,"pucch2 cw %d group %d aa %d: (%d,%d)+(%d,%d) = (%d,%d)\n",cw,group,aa,
 		corr32_re[group][aa],corr32_im[group][aa],
@@ -1499,11 +1499,11 @@ void nr_decode_pucch2(PHY_VARS_gNB *gNB,
 	  if (cw==0) corr += ((int64_t)corr32_re[half_prb>>2][aa]*corr32_re[half_prb>>2][aa])+
 		       ((int64_t)corr32_im[half_prb>>2][aa]*corr32_im[half_prb>>2][aa]);
 
-	
+
 	  corr_re = ( corr32_re[half_prb>>2][aa]/(2*nc_group_size*4/2)+((int16_t*)(&prod_re[aa]))[0]);
 	  corr_im = ( corr32_im[half_prb>>2][aa]/(2*nc_group_size*4/2)+((int16_t*)(&prod_im[aa]))[0]);
 	  corr_tmp += corr_re*corr_re + corr_im*corr_im;
-          /*
+
           LOG_D(PHY,"pucch2 half_prb %d cw %d (%d,%d) aa %d: (%d,%d,%d,%d,%d,%d,%d,%d)x(%d,%d,%d,%d,%d,%d,%d,%d)  (%d,%d)+(%d,%d) = (%d,%d) => %d\n",
                 half_prb,cw,cw&15,cw>>4,aa,
                 ((int16_t*)&pucch2_polar_4bit[cw&15])[0],((int16_t*)&pucch2_polar_4bit[cw>>4])[0],
@@ -1520,15 +1520,15 @@ void nr_decode_pucch2(PHY_VARS_gNB *gNB,
                 corr_re,
                 corr_im,
                 corr_tmp);
-          */
+
 	}
 	corr16 = _mm_set1_epi16((int16_t)(corr_tmp>>8));
-	/*	
+
 	LOG_D(PHY,"half_prb %d cw %d corr16 %d\n",half_prb,cw,corr_tmp>>8);
-	*/
+
 	llr_num = _mm_max_epi16(_mm_mullo_epi16(corr16,pucch2_polar_llr_num_lut[cw]),llr_num);
 	llr_den = _mm_max_epi16(_mm_mullo_epi16(corr16,pucch2_polar_llr_den_lut[cw]),llr_den);
-	/*
+
 	LOG_D(PHY,"lut_num (%d,%d,%d,%d,%d,%d,%d,%d)\n",
 	      ((int16_t*)&pucch2_polar_llr_num_lut[cw])[0],
 	      ((int16_t*)&pucch2_polar_llr_num_lut[cw])[1],
@@ -1538,7 +1538,7 @@ void nr_decode_pucch2(PHY_VARS_gNB *gNB,
 	      ((int16_t*)&pucch2_polar_llr_num_lut[cw])[5],
 	      ((int16_t*)&pucch2_polar_llr_num_lut[cw])[6],
 	      ((int16_t*)&pucch2_polar_llr_num_lut[cw])[7]);
-	
+
 	LOG_D(PHY,"llr_num (%d,%d,%d,%d,%d,%d,%d,%d)\n",
 	      ((int16_t*)&llr_num)[0],
 	      ((int16_t*)&llr_num)[1],
@@ -1557,7 +1557,7 @@ void nr_decode_pucch2(PHY_VARS_gNB *gNB,
 	      ((int16_t*)&llr_den)[5],
 	      ((int16_t*)&llr_den)[6],
 	      ((int16_t*)&llr_den)[7]);
-	*/	
+
       }
       // compute llrs
       llrs[half_prb] = _mm_subs_epi16(llr_num,llr_den);

openair1/PHY/defs_gNB.h

@@ -120,6 +120,13 @@ typedef struct {
   nfapi_nr_dl_tti_pdcch_pdu pdcch_pdu;
 } NR_gNB_PDCCH_t;
 
+typedef struct {
+  uint8_t active;
+  int frame;
+  int slot;
+  nfapi_nr_dl_tti_csi_rs_pdu csirs_pdu;
+} NR_gNB_CSIRS_t;
+
 typedef struct {
   int frame;
   int slot;
@@ -760,6 +767,7 @@ typedef struct PHY_VARS_gNB_s {
   NR_gNB_PUSCH       *pusch_vars[NUMBER_OF_NR_ULSCH_MAX];
   NR_gNB_PUCCH_t     *pucch[NUMBER_OF_NR_PUCCH_MAX];
   NR_gNB_PDCCH_t     pdcch_pdu[NUMBER_OF_NR_PDCCH_MAX];
+  NR_gNB_CSIRS_t     csirs_pdu[NUMBER_OF_NR_CSIRS_MAX];
   NR_gNB_UL_PDCCH_t  ul_pdcch_pdu[NUMBER_OF_NR_PDCCH_MAX];
   NR_gNB_DLSCH_t     *dlsch[NUMBER_OF_NR_DLSCH_MAX][2];    // Nusers times two spatial streams
   NR_gNB_ULSCH_t     *ulsch[NUMBER_OF_NR_ULSCH_MAX][2];  // [Nusers times][2 codewords] 

openair1/SCHED_NR/fapi_nr_l1.c

@@ -111,10 +111,9 @@ void handle_nfapi_nr_pdcch_pdu(PHY_VARS_gNB *gNB,
 
   nr_fill_dci(gNB,frame,slot,pdcch_pdu);
 
-
-
 }
 
+
 void handle_nfapi_nr_ul_dci_pdu(PHY_VARS_gNB *gNB,
 			       int frame, int slot,
 			       nfapi_nr_ul_dci_request_pdus_t *ul_dci_request_pdu) {
@@ -128,6 +127,30 @@ void handle_nfapi_nr_ul_dci_pdu(PHY_VARS_gNB *gNB,
 
 }
 
+
+void handle_nfapi_nr_csirs_pdu(PHY_VARS_gNB *gNB,
+			       int frame, int slot,
+			       nfapi_nr_dl_tti_csi_rs_pdu *csirs_pdu) {
+
+  int found = 0;
+
+  for (int id=0; id<NUMBER_OF_NR_CSIRS_MAX; id++) {
+    NR_gNB_CSIRS_t *csirs = &gNB->csirs_pdu[id];
+    if (csirs->active == 0) {
+      LOG_D(PHY,"Frame %d Slot %d CSI_RS with ID %d is now active\n",frame,slot,id);
+      csirs->frame = frame;
+      csirs->slot = slot;
+      csirs->active = 1;
+      memcpy((void*)&csirs->csirs_pdu, (void*)csirs_pdu, sizeof(nfapi_nr_dl_tti_csi_rs_pdu));
+      found = 1;
+      break;
+    }
+  }
+  if (found == 0)
+    LOG_E(MAC,"CSI-RS list is full\n");
+}
+
+
 void handle_nr_nfapi_pdsch_pdu(PHY_VARS_gNB *gNB,int frame,int slot,
                             nfapi_nr_dl_tti_pdsch_pdu *pdsch_pdu,
                             uint8_t *sdu)
@@ -195,6 +218,12 @@ void nr_schedule_response(NR_Sched_Rsp_t *Sched_INFO){
 	pdcch_received = 1;
 
       break;
+      case NFAPI_NR_DL_TTI_CSI_RS_PDU_TYPE:
+        LOG_D(PHY,"frame %d, slot %d, Got NFAPI_NR_DL_TTI_CSI_RS_PDU_TYPE for %d.%d\n",frame,slot,DL_req->SFN,DL_req->Slot);
+        handle_nfapi_nr_csirs_pdu(gNB,
+				  frame, slot,
+				  &dl_tti_pdu->csi_rs_pdu);
+      break;
       case NFAPI_NR_DL_TTI_PDSCH_PDU_TYPE:
 
       {

openair1/SCHED_NR/fapi_nr_l1.h

@@ -43,6 +43,10 @@ void handle_nr_nfapi_ssb_pdu(PHY_VARS_gNB *gNB,
 
 void nr_schedule_response(NR_Sched_Rsp_t *Sched_INFO);
 
+void handle_nfapi_nr_csirs_pdu(PHY_VARS_gNB *gNB,
+			       int frame, int slot,
+			       nfapi_nr_dl_tti_csi_rs_pdu *csirs_pdu);
+
 void handle_nfapi_nr_pdcch_pdu(PHY_VARS_gNB *gNB,
 			       int frame, int subframe,
 			       nfapi_nr_dl_tti_pdcch_pdu *dcl_dl_pdu);

openair1/SCHED_NR/phy_procedures_nr_gNB.c

@@ -194,6 +194,18 @@ void phy_procedures_gNB_TX(PHY_VARS_gNB *gNB,
     VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_GENERATE_DLSCH,0);
   }
 
+  for (int i=0;i<NUMBER_OF_NR_CSIRS_MAX;i++){
+    NR_gNB_CSIRS_t *csirs = &gNB->csirs_pdu[i];
+    if ((csirs->active == 1) &&
+	(csirs->frame == frame) &&
+	(csirs->slot == slot) ) {
+      LOG_D(PHY, "CSI-RS generation started in frame %d.%d\n",frame,slot);
+      nfapi_nr_dl_tti_csi_rs_pdu_rel15_t csi_params = csirs->csirs_pdu.csi_rs_pdu_rel15;
+      nr_generate_csi_rs(gNB, AMP, csi_params, gNB->gNB_config.cell_config.phy_cell_id.value, slot);
+      csirs->active = 0;
+    }
+  }
+
   if (do_meas==1) stop_meas(&gNB->phy_proc_tx);
 
   if ((frame&127) == 0) dump_pdsch_stats(gNB);
@@ -202,7 +214,7 @@ void phy_procedures_gNB_TX(PHY_VARS_gNB *gNB,
   for (aa=0; aa<cfg->carrier_config.num_tx_ant.value; aa++) {
 	  apply_nr_rotation(fp,(int16_t*) &gNB->common_vars.txdataF[aa][txdataF_offset],slot,0,fp->Ncp==EXTENDED?12:14,fp->ofdm_symbol_size);
   }
-  
+
   VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_PROCEDURES_gNB_TX+offset,0);
 }
 

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler.c

@@ -430,6 +430,9 @@ void gNB_dlsch_ulsch_scheduler(module_id_t module_idP,
   // This schedule SR
   nr_sr_reporting(module_idP, frame, slot);
 
+  // Schedule CSI-RS transmission
+  nr_csirs_scheduling(module_idP, frame, slot, nr_slots_per_frame[*scc->ssbSubcarrierSpacing]);
+
   // Schedule CSI measurement reporting: check in slot 0 for the whole frame
   if (slot == 0)
     nr_csi_meas_reporting(module_idP, frame, slot);

openair2/LAYER2/NR_MAC_gNB/mac_proto.h

@@ -178,7 +178,13 @@ void nr_schedule_pucch(int Mod_idP,
                        frame_t frameP,
                        sub_frame_t slotP);
 
-void csi_period_offset(const NR_CSI_ReportConfig_t *csirep,
+void nr_csirs_scheduling(int Mod_idP,
+                         frame_t frame,
+                         sub_frame_t slot,
+                         int n_slots_frame);
+
+void csi_period_offset(NR_CSI_ReportConfig_t *csirep,
+                       NR_NZP_CSI_RS_Resource_t *nzpcsi,
                        int *period, int *offset);
 
 void nr_csi_meas_reporting(int Mod_idP,

openair2/LAYER2/NR_MAC_gNB/nr_mac_gNB.h

@@ -440,7 +440,8 @@ struct CRI_RI_LI_PMI_CQI {
   uint8_t li;
   uint8_t pmi_x1;
   uint8_t pmi_x2;
-  uint8_t cqi;
+  uint8_t wb_cqi_1tb;
+  uint8_t wb_cqi_2tb;
 };
 
 typedef struct CRI_SSB_RSRP {

targets/COMMON/openairinterface5g_limits.h

@@ -13,7 +13,8 @@
 #        define NUMBER_OF_NR_ULSCH_MAX 8
 #        define NUMBER_OF_NR_DLSCH_MAX 8
 #        define NUMBER_OF_NR_UCI_MAX 16
-#        define nUMBER_OF_NR_SRS_MAX 16
+#        define NUMBER_OF_NR_SRS_MAX 16
+#        define NUMBER_OF_NR_CSIRS_MAX 16
 #        define NUMBER_OF_SCH_STATS_MAX 16
 
 #        define NUMBER_OF_NR_SCH_STATS_MAX 16

targets/PROJECTS/GENERIC-LTE-EPC/CONF/testing_enb.conf

@@ -263,7 +263,7 @@ RUs = (
          max_pdschReferenceSignalPower = -27;
          max_rxgain                    = 118;
          eNB_instances  = [0];
-         clock_src = "external";
+         clock_src = "internal";
     }
 );  
 

targets/PROJECTS/GENERIC-LTE-EPC/CONF/testing_gnb.conf

@@ -249,7 +249,7 @@ RUs = (
          max_pdschReferenceSignalPower = -27;
          max_rxgain                    = 114;
          eNB_instances  = [0];
-         #clock_src = "external";
+         clock_src = "internal";
     }
 );