Add T2 LDPC encoding/decoding offload

openair1/SIMULATION/NR_PHY/dlsim.c

@@ -291,6 +291,7 @@ int main(int argc, char **argv)
   uint8_t n_tx=1,n_rx=1;
   uint8_t round;
   uint8_t num_rounds = 4;
+  int ldpc_offload_flag = 0;
   char gNBthreads[128]="n";
 
   channel_desc_t *gNB2UE;
@@ -398,6 +399,10 @@ int main(int argc, char **argv)
       n_trials = atoi(optarg);
       break;
 
+    case 'c':
+      ldpc_offload_flag = 1;
+      break;
+
     case 's':
       snr0 = atof(optarg);
       printf("Setting SNR0 to %f\n",snr0);
@@ -562,6 +567,7 @@ int main(int argc, char **argv)
       //printf("-j Relative strength of second intefering gNB (in dB) - cell_id mod 3 = 2\n");
       printf("-R N_RB_DL\n");
       printf("-O oversampling factor (1,2,4,8,16)\n");
+      printf("-c ldpc offload flag\n");
       printf("-A Interpolation_filname Run with Abstraction to generate Scatter plot using interpolation polynomial in file\n");
       //printf("-C Generate Calibration information for Abstraction (effective SNR adjustment to remove Pe bias w.r.t. AWGN)\n");
       printf("-f raw file containing RRC configuration (generated by gNB)\n");
@@ -620,6 +626,7 @@ int main(int argc, char **argv)
 
   gNB = RC.gNB[0];
   gNB->ofdm_offset_divisor = UINT_MAX;
+  gNB->ldpc_offload_flag = ldpc_offload_flag;
   frame_parms = &gNB->frame_parms; //to be initialized I suppose (maybe not necessary for PBCH)
   frame_parms->nb_antennas_tx = n_tx;
   frame_parms->nb_antennas_rx = n_rx;
@@ -1325,6 +1332,9 @@ int main(int argc, char **argv)
   free(UE->phy_sim_pdsch_dl_ch_estimates_ext);
   free(UE->phy_sim_dlsch_b);
 
+  if (gNB->ldpc_offload_flag)
+    free_LDPClib(&ldpc_interface_offload);
+
   if (output_fd)
     fclose(output_fd);
 

openair1/SIMULATION/NR_PHY/ulsim.c

@@ -186,6 +186,7 @@ int main(int argc, char *argv[])
   double effRate;
   double effTP;
   float eff_tp_check = 100;
+  int ldpc_offload_flag = 0;
   uint8_t max_rounds = 4;
   int chest_type[2] = {0};
   int enable_ptrs = 0;
@@ -329,6 +330,10 @@ int main(int argc, char *argv[])
       n_trials = atoi(optarg);
       break;
 
+    case 'o':
+      ldpc_offload_flag = 1;
+      break;
+
     case 'p':
       extended_prefix_flag = 1;
       break;
@@ -488,6 +493,7 @@ int main(int argc, char *argv[])
       printf("-k 3/4 sampling\n");
       printf("-m MCS value\n");
       printf("-n Number of trials to simulate\n");
+      printf("-o ldpc offload flag\n");
       printf("-p Use extended prefix mode\n");
       printf("-q MCS table\n");
       printf("-r Number of allocated resource blocks for PUSCH\n");
@@ -623,6 +629,7 @@ int main(int argc, char *argv[])
   cfg->carrier_config.num_rx_ant.value = n_rx;
 
 //  nr_phy_config_request_sim(gNB,N_RB_DL,N_RB_DL,mu,0,0x01);
+  gNB->ldpc_offload_flag = ldpc_offload_flag;
   gNB->chest_freq = chest_type[0];
   gNB->chest_time = chest_type[1];
 
@@ -1604,6 +1611,8 @@ int main(int argc, char *argv[])
           num_dmrs_cdm_grps_no_data);
 
   free_MIB_NR(mib);
+  if (gNB->ldpc_offload_flag)
+    free_LDPClib(&ldpc_interface_offload);
 
   if (output_fd)
     fclose(output_fd);