Modifying get_L_ptrs and minor fixes

executables/nr-ue.c

@@ -399,7 +399,7 @@ void processSlotTX( PHY_VARS_NR_UE *UE, UE_nr_rxtx_proc_t *proc) {
     ptrs_mcs3 = 10;
     n_rb0 = 25;
     n_rb1 = 75;
-    ptrs_time_density = get_L_ptrs(ptrs_mcs1, ptrs_mcs2, ptrs_mcs3, mcs_index);
+    ptrs_time_density = get_L_ptrs(ptrs_mcs1, ptrs_mcs2, ptrs_mcs3, mcs_index, mcs_table);
     ptrs_freq_density = get_K_ptrs(n_rb0, n_rb1, rb_size);
     //------------------------------------------------------------------------------//
 

openair1/PHY/NR_UE_TRANSPORT/nr_ulsch_ue.c

@@ -285,7 +285,7 @@ void nr_ue_ulsch_procedures(PHY_VARS_NR_UE *UE,
   if (UE->ptrs_configured == 1) {
 
     K_ptrs = harq_process_ul_ue->pusch_pdu.pusch_ptrs.ptrs_freq_density;
-    L_ptrs = harq_process_ul_ue->pusch_pdu.pusch_ptrs.ptrs_time_density;
+    L_ptrs = 1<<harq_process_ul_ue->pusch_pdu.pusch_ptrs.ptrs_time_density;
 
     beta_ptrs = 1; // temp value until power control is implemented
 

openair1/SIMULATION/NR_PHY/ulsim.c

@@ -506,11 +506,15 @@ int main(int argc, char **argv)
   uint8_t ptrs_mcs3 = 10;
   uint16_t n_rb0 = 25;
   uint16_t n_rb1 = 75;
+  uint8_t mcs_table = 0;
+
   uint8_t length_dmrs = pusch_len1; // [hna] remove dmrs struct
   uint16_t l_prime_mask = get_l_prime(nb_symb_sch, typeB, pusch_dmrs_pos0, length_dmrs);  // [hna] remove dmrs struct
-  uint8_t ptrs_time_density = get_L_ptrs(ptrs_mcs1, ptrs_mcs2, ptrs_mcs3, Imcs);
+  uint8_t ptrs_time_density = get_L_ptrs(ptrs_mcs1, ptrs_mcs2, ptrs_mcs3, Imcs, mcs_table);
   uint8_t ptrs_freq_density = get_K_ptrs(n_rb0, n_rb1, nb_rb);
 
+  printf("time_density = %d\n", ptrs_time_density);
+  printf("freq_density = %d\n", ptrs_freq_density);
   for (i = 0; i < nb_symb_sch; i++) {
     number_dmrs_symbols += (l_prime_mask >> i) & 0x01;
   }
@@ -552,7 +556,7 @@ int main(int argc, char **argv)
       pusch_pdu->pdu_bit_map = PUSCH_PDU_BITMAP_PUSCH_DATA;  
       pusch_pdu->rnti = n_rnti;
       pusch_pdu->mcs_index = Imcs;
-      pusch_pdu->mcs_table = 0; 
+      pusch_pdu->mcs_table = mcs_table;
       pusch_pdu->target_code_rate = code_rate;
       pusch_pdu->qam_mod_order = mod_order;
       pusch_pdu->transform_precoding = 0;
@@ -598,7 +602,7 @@ int main(int argc, char **argv)
       ul_config.ul_config_list[0].pusch_config_pdu.ul_dmrs_symb_pos = l_prime_mask;
       ul_config.ul_config_list[0].pusch_config_pdu.dmrs_config_type = 0;
       ul_config.ul_config_list[0].pusch_config_pdu.mcs_index = Imcs;
-      ul_config.ul_config_list[0].pusch_config_pdu.mcs_table = 0;
+      ul_config.ul_config_list[0].pusch_config_pdu.mcs_table = mcs_table;
       ul_config.ul_config_list[0].pusch_config_pdu.pusch_data.new_data_indicator = 0;
       ul_config.ul_config_list[0].pusch_config_pdu.pusch_data.rv_index = 0;
       ul_config.ul_config_list[0].pusch_config_pdu.nrOfLayers = precod_nbr_layers;

openair2/LAYER2/NR_MAC_COMMON/nr_mac_common.c

@@ -606,29 +606,38 @@ int32_t get_l_prime(uint8_t duration_in_symbols, uint8_t mapping_type, pusch_dmr
 *
 * NAME :         get_L_ptrs
 *
-* PARAMETERS :   ptrs_UplinkConfig      PTRS uplink configuration
+* PARAMETERS :   mcs(i)                 higher layer parameter in PTRS-UplinkConfig
 *                I_mcs                  MCS index used for PUSCH
+*                mcs_table              0 for table 5.1.3.1-1, 1 for table 5.1.3.1-1
 *
 * RETURN :       the parameter L_ptrs
 *
-* DESCRIPTION :  3GPP TS 38.214 6.2.3 Table 6.2.3.1-1
+* DESCRIPTION :  3GPP TS 38.214 section 6.2.3.1
 *
 *********************************************************************/
 
-uint8_t get_L_ptrs(uint8_t mcs1, uint8_t mcs2, uint8_t mcs3, uint8_t I_mcs) {
+uint8_t get_L_ptrs(uint8_t mcs1, uint8_t mcs2, uint8_t mcs3, uint8_t I_mcs, uint8_t mcs_table) {
 
-  if (mcs1 == 0 || mcs2 == 0 || mcs3 == 0)
-    return 1;
+  uint8_t mcs4;
+
+  if(mcs_table == 0)
+    mcs4 = 29;
+  else
+    mcs4 = 28;
 
   if (I_mcs < mcs1) {
-    LOG_I(PHY,"PUSH PT-RS is not present.\n");
-    return 0;
+    LOG_I(PHY, "PUSH PT-RS is not present.\n");
+    return -1;
   } else if (I_mcs >= mcs1 && I_mcs < mcs2)
-    return 4;
-  else if (I_mcs >= mcs2 && I_mcs < mcs3)
     return 2;
-  else
+  else if (I_mcs >= mcs2 && I_mcs < mcs3)
     return 1;
+  else if (I_mcs >= mcs3 && I_mcs < mcs4)
+    return 0;
+  else {
+    LOG_I(PHY, "PT-RS time-density determination is obtained from the DCI for the same transport block in the initial transmission\n");
+    return -1;
+  }
 }
 
 /*******************************************************************

openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_phytest.c

@@ -788,12 +788,12 @@ void nr_schedule_uss_ulsch_phytest(int Mod_idP,
   // --------------------
   // ------- PTRS -------
   // --------------------
-  uint8_t ptrs_mcs1 = 2;
-  uint8_t ptrs_mcs2 = 4;
-  uint8_t ptrs_mcs3 = 10;
+  uint8_t ptrs_mcs1 = 2;  // higher layer parameter in PTRS-UplinkConfig
+  uint8_t ptrs_mcs2 = 4;  // higher layer parameter in PTRS-UplinkConfig
+  uint8_t ptrs_mcs3 = 10; // higher layer parameter in PTRS-UplinkConfig
   uint16_t n_rb0 = 25;
   uint16_t n_rb1 = 75;
-  pusch_pdu->pusch_ptrs.ptrs_time_density = get_L_ptrs(ptrs_mcs1, ptrs_mcs2, ptrs_mcs3, pusch_pdu->mcs_index);
+  pusch_pdu->pusch_ptrs.ptrs_time_density = get_L_ptrs(ptrs_mcs1, ptrs_mcs2, ptrs_mcs3, pusch_pdu->mcs_index, pusch_pdu->mcs_table);
   pusch_pdu->pusch_ptrs.ptrs_freq_density = get_K_ptrs(n_rb0, n_rb1, pusch_pdu->rb_size);
   // --------------------------------------------------------------------------------------------------------------------------------------------
 

openair2/LAYER2/NR_MAC_gNB/mac_proto.h

@@ -165,7 +165,7 @@ int get_num_dmrs(uint16_t dmrs_mask );
 uint8_t get_l0_ul(uint8_t mapping_type, uint8_t dmrs_typeA_position);
 int32_t get_l_prime(uint8_t duration_in_symbols, uint8_t mapping_type, pusch_dmrs_AdditionalPosition_t additional_pos, pusch_maxLength_t pusch_maxLength);
 
-uint8_t get_L_ptrs(uint8_t mcs1, uint8_t mcs2, uint8_t mcs3, uint8_t I_mcs);
+uint8_t get_L_ptrs(uint8_t mcs1, uint8_t mcs2, uint8_t mcs3, uint8_t I_mcs, uint8_t mcs_table);
 uint8_t get_K_ptrs(uint16_t nrb0, uint16_t nrb1, uint16_t N_RB);
 
 uint16_t nr_dci_size(nr_dci_format_t format,