/* * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The OpenAirInterface Software Alliance licenses this file to You under * the OAI Public License, Version 1.1 (the "License"); you may not use this file * except in compliance with the License. * You may obtain a copy of the License at * * http://www.openairinterface.org/?page_id=698 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. *------------------------------------------------------------------------------- * For more information about the OpenAirInterface (OAI) Software Alliance: * contact@openairinterface.org */ #include <string.h> #include <math.h> #include <unistd.h> #include <fcntl.h> #include <sys/ioctl.h> #include <sys/mman.h> #include "common/ran_context.h" #include "common/config/config_userapi.h" #include "common/utils/LOG/log.h" #include "common/utils/LOG/vcd_signal_dumper.h" #include "T.h" #include "PHY/defs_gNB.h" #include "PHY/defs_nr_common.h" #include "PHY/defs_nr_UE.h" #include "PHY/types.h" #include "PHY/INIT/phy_init.h" #include "PHY/MODULATION/modulation_eNB.h" #include "PHY/MODULATION/modulation_UE.h" #include "PHY/NR_REFSIG/refsig_defs_ue.h" #include "PHY/NR_TRANSPORT/nr_dlsch.h" #include "PHY/NR_TRANSPORT/nr_transport_proto.h" #include "PHY/NR_UE_TRANSPORT/nr_transport_proto_ue.h" #include "SCHED_NR/sched_nr.h" #include "openair1/SIMULATION/TOOLS/sim.h" #include "openair1/SIMULATION/RF/rf.h" #include "openair1/SIMULATION/NR_PHY/nr_unitary_defs.h" #include "openair1/SIMULATION/NR_PHY/nr_dummy_functions.c" //#define DEBUG_NR_DLSCHSIM PHY_VARS_gNB *gNB; PHY_VARS_NR_UE *UE; RAN_CONTEXT_t RC; UE_nr_rxtx_proc_t proc; int32_t uplink_frequency_offset[MAX_NUM_CCs][4]; double cpuf; //uint8_t nfapi_mode = 0; uint16_t NB_UE_INST = 1; uint8_t const nr_rv_round_map[4] = {0, 2, 1, 3}; uint8_t const nr_rv_round_map_ue[4] = {0, 2, 1, 3}; // needed for some functions PHY_VARS_NR_UE *PHY_vars_UE_g[1][1] = { { NULL } }; uint16_t n_rnti = 0x1234; openair0_config_t openair0_cfg[MAX_CARDS]; void init_downlink_harq_status(NR_DL_UE_HARQ_t *dl_harq) {} int main(int argc, char **argv) { char c; int i; //,j,l,aa; double SNR, SNR_lin, snr0 = -2.0, snr1 = 2.0; double snr_step = 0.1; uint8_t snr1set = 0; int **txdata; double **s_re, **s_im, **r_re, **r_im; // int sync_pos, sync_pos_slot; // FILE *rx_frame_file; FILE *output_fd = NULL; //uint8_t write_output_file = 0; // int subframe_offset; // char fname[40], vname[40]; int trial, n_trials = 1, n_errors = 0, n_false_positive = 0; uint8_t n_tx = 1, n_rx = 1; //uint8_t transmission_mode = 1; uint16_t Nid_cell = 0; channel_desc_t *gNB2UE; uint8_t extended_prefix_flag = 0; //int8_t interf1 = -21, interf2 = -21; FILE *input_fd = NULL, *pbch_file_fd = NULL; //char input_val_str[50],input_val_str2[50]; //uint16_t NB_RB=25; SCM_t channel_model = AWGN; //Rayleigh1_anticorr; uint16_t N_RB_DL = 106, mu = 1; //unsigned char frame_type = 0; unsigned char pbch_phase = 0; int frame = 0, slot = 0; int frame_length_complex_samples; //int frame_length_complex_samples_no_prefix; NR_DL_FRAME_PARMS *frame_parms; uint8_t Kmimo = 0; uint32_t Nsoft = 0; double sigma; unsigned char qbits = 8; int ret; //int run_initial_sync=0; int loglvl = OAILOG_WARNING; float target_error_rate = 0.01; uint64_t SSB_positions=0x01; uint16_t nb_symb_sch = 12; uint16_t nb_rb = 50; uint8_t Imcs = 9; uint8_t mcs_table = 0; double DS_TDL = .03; cpuf = get_cpu_freq_GHz(); if (load_configmodule(argc, argv, CONFIG_ENABLECMDLINEONLY) == 0) { exit_fun("[NR_DLSCHSIM] Error, configuration module init failed\n"); } //logInit(); randominit(0); while ((c = getopt(argc, argv, "df:hpVg:i:j:n:l:m:r:s:S:y:z:M:N:F:R:P:L:")) != -1) { switch (c) { /*case 'f': write_output_file = 1; output_fd = fopen(optarg, "w"); if (output_fd == NULL) { printf("Error opening %s\n", optarg); exit(-1); } break;*/ /*case 'd': frame_type = 1; break;*/ case 'g': switch ((char) *optarg) { case 'A': channel_model = SCM_A; break; case 'B': channel_model = SCM_B; break; case 'C': channel_model = SCM_C; break; case 'D': channel_model = SCM_D; break; case 'E': channel_model = EPA; break; case 'F': channel_model = EVA; break; case 'G': channel_model = ETU; break; default: printf("Unsupported channel model! Exiting.\n"); exit(-1); } break; /*case 'i': interf1 = atoi(optarg); break; case 'j': interf2 = atoi(optarg); break;*/ case 'n': n_trials = atoi(optarg); break; case 's': snr0 = atof(optarg); #ifdef DEBUG_NR_DLSCHSIM printf("Setting SNR0 to %f\n", snr0); #endif break; case 'V': ouput_vcd = 1; break; case 'S': snr1 = atof(optarg); snr1set = 1; printf("Setting SNR1 to %f\n", snr1); #ifdef DEBUG_NR_DLSCHSIM printf("Setting SNR1 to %f\n", snr1); #endif break; case 'p': extended_prefix_flag = 1; break; /* case 'r': ricean_factor = pow(10,-.1*atof(optarg)); if (ricean_factor>1) { printf("Ricean factor must be between 0 and 1\n"); exit(-1); } break; */ case 'y': n_tx = atoi(optarg); if ((n_tx == 0) || (n_tx > 2)) { printf("Unsupported number of TX antennas %d. Exiting.\n", n_tx); exit(-1); } break; case 'z': n_rx = atoi(optarg); if ((n_rx == 0) || (n_rx > 2)) { printf("Unsupported number of RX antennas %d. Exiting.\n", n_rx); exit(-1); } break; case 'M': SSB_positions = atoi(optarg); break; case 'N': Nid_cell = atoi(optarg); break; case 'R': N_RB_DL = atoi(optarg); break; case 'F': input_fd = fopen(optarg, "r"); if (input_fd == NULL) { printf("Problem with filename %s. Exiting.\n", optarg); exit(-1); } break; case 'P': pbch_phase = atoi(optarg); if (pbch_phase > 3) printf("Illegal PBCH phase (0-3) got %d\n", pbch_phase); break; case 'L': loglvl = atoi(optarg); break; case 'm': Imcs = atoi(optarg); break; case 'l': nb_symb_sch = atoi(optarg); break; case 'r': nb_rb = atoi(optarg); break; /*case 'x': transmission_mode = atoi(optarg); break;*/ default: case 'h': printf("%s -h(elp) -p(extended_prefix) -N cell_id -f output_filename -F input_filename -g channel_model -n n_frames -t Delayspread -s snr0 -S snr1 -x transmission_mode -y TXant -z RXant -i Intefrence0 -j Interference1 -A interpolation_file -C(alibration offset dB) -N CellId\n", argv[0]); printf("-h This message\n"); printf("-p Use extended prefix mode\n"); printf("-V Enable VCD dumb functions\n"); //printf("-d Use TDD\n"); printf("-n Number of frames to simulate\n"); printf("-s Starting SNR, runs from SNR0 to SNR0 + 5 dB. If n_frames is 1 then just SNR is simulated\n"); printf("-S Ending SNR, runs from SNR0 to SNR1\n"); printf("-t Delay spread for multipath channel\n"); printf("-g [A,B,C,D,E,F,G] Use 3GPP SCM (A,B,C,D) or 36-101 (E-EPA,F-EVA,G-ETU) models (ignores delay spread and Ricean factor)\n"); //printf("-x Transmission mode (1,2,6 for the moment)\n"); printf("-y Number of TX antennas used in eNB\n"); printf("-z Number of RX antennas used in UE\n"); //printf("-i Relative strength of first intefering eNB (in dB) - cell_id mod 3 = 1\n"); //printf("-j Relative strength of second intefering eNB (in dB) - cell_id mod 3 = 2\n"); printf("-M Multiple SSB positions in burst\n"); printf("-N Nid_cell\n"); printf("-R N_RB_DL\n"); printf("-O oversampling factor (1,2,4,8,16)\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 Output filename (.txt format) for Pe/SNR results\n"); printf("-F Input filename (.txt format) for RX conformance testing\n"); exit(-1); break; } } logInit(); set_glog(loglvl); T_stdout = 1; if (snr1set == 0) snr1 = snr0 + 10; if (ouput_vcd) vcd_signal_dumper_init("/tmp/openair_dump_nr_dlschsim.vcd"); gNB2UE = new_channel_desc_scm(n_tx, n_rx, channel_model, 61.44e6, //N_RB2sampling_rate(N_RB_DL), 40e6, //N_RB2channel_bandwidth(N_RB_DL), DS_TDL, 0, 0, 0, 0); if (gNB2UE == NULL) { printf("Problem generating channel model. Exiting.\n"); exit(-1); } RC.gNB = (PHY_VARS_gNB **) malloc(sizeof(PHY_VARS_gNB *)); RC.gNB[0] = malloc(sizeof(PHY_VARS_gNB)); gNB = RC.gNB[0]; //gNB_config = &gNB->gNB_config; 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; frame_parms->N_RB_DL = N_RB_DL; frame_parms->Ncp = extended_prefix_flag ? EXTENDED : NORMAL; crcTableInit(); nr_phy_config_request_sim(gNB, N_RB_DL, N_RB_DL, mu, Nid_cell,SSB_positions); phy_init_nr_gNB(gNB, 0, 1); //lowmem //init_eNB_afterRU(); frame_length_complex_samples = frame_parms->samples_per_subframe; //frame_length_complex_samples_no_prefix = frame_parms->samples_per_subframe_wCP; s_re = malloc(2 * sizeof(double *)); s_im = malloc(2 * sizeof(double *)); r_re = malloc(2 * sizeof(double *)); r_im = malloc(2 * sizeof(double *)); txdata = malloc(2 * sizeof(int *)); for (i = 0; i < 2; i++) { s_re[i] = malloc(frame_length_complex_samples * sizeof(double)); bzero(s_re[i], frame_length_complex_samples * sizeof(double)); s_im[i] = malloc(frame_length_complex_samples * sizeof(double)); bzero(s_im[i], frame_length_complex_samples * sizeof(double)); r_re[i] = malloc(frame_length_complex_samples * sizeof(double)); bzero(r_re[i], frame_length_complex_samples * sizeof(double)); r_im[i] = malloc(frame_length_complex_samples * sizeof(double)); bzero(r_im[i], frame_length_complex_samples * sizeof(double)); txdata[i] = malloc(frame_length_complex_samples * sizeof(int)); bzero(r_re[i], frame_length_complex_samples * sizeof(int)); // [hna] r_re should be txdata } if (pbch_file_fd != NULL) { load_pbch_desc(pbch_file_fd); } /* for (int k=0; k<2; k++) { // Create transport channel structures for 2 transport blocks (MIMO) for (i=0; i<2; i++) { gNB->dlsch[k][i] = new_gNB_dlsch(Kmimo,8,Nsoft,0,frame_parms,gNB_config); if (!gNB->dlsch[k][i]) { printf("Can't get eNB dlsch structures\n"); exit(-1); } gNB->dlsch[k][i]->Nsoft = 10; gNB->dlsch[k][i]->rnti = n_rnti+k; } }*/ //configure UE UE = malloc(sizeof(PHY_VARS_NR_UE)); memcpy(&UE->frame_parms, frame_parms, sizeof(NR_DL_FRAME_PARMS)); //phy_init_nr_top(frame_parms); if (init_nr_ue_signal(UE, 1, 0) != 0) { printf("Error at UE NR initialisation\n"); exit(-1); } //nr_init_frame_parms_ue(&UE->frame_parms); //init_nr_ue_transport(UE, 0); for (int sf = 0; sf < 2; sf++) { for (i = 0; i < 2; i++) { UE->dlsch[sf][0][i] = new_nr_ue_dlsch(Kmimo, 8, Nsoft, 5, N_RB_DL, 0); if (!UE->dlsch[sf][0][i]) { printf("Can't get ue dlsch structures\n"); exit(-1); } UE->dlsch[sf][0][i]->rnti = n_rnti; } } UE->dlsch_SI[0] = new_nr_ue_dlsch(1, 1, Nsoft, 5, N_RB_DL, 0); UE->dlsch_ra[0] = new_nr_ue_dlsch(1, 1, Nsoft, 5, N_RB_DL, 0); unsigned char harq_pid = 0; //dlsch->harq_ids[subframe]; NR_gNB_DLSCH_t *dlsch = gNB->dlsch[0][0]; nfapi_nr_dl_tti_pdsch_pdu_rel15_t *rel15 = &dlsch->harq_process.pdsch_pdu.pdsch_pdu_rel15; //time_stats_t *rm_stats, *te_stats, *i_stats; uint8_t is_crnti = 0, llr8_flag = 0; unsigned int TBS = 8424; unsigned int available_bits; uint8_t nb_re_dmrs = 6; // No data in dmrs symbol uint16_t length_dmrs = 1; unsigned char mod_order; uint16_t rate; uint8_t Nl = 1; uint8_t rvidx = 0; dlsch->rnti = 1; /*dlsch->harq_processes[0]->mcs = Imcs; dlsch->harq_processes[0]->rvidx = rvidx;*/ //printf("dlschsim harqid %d nb_rb %d, mscs %d\n",dlsch->harq_ids[subframe], // dlsch->harq_processes[0]->nb_rb,dlsch->harq_processes[0]->mcs,dlsch->harq_processes[0]->Nl); mod_order = nr_get_Qm_dl(Imcs, mcs_table); rate = nr_get_code_rate_dl(Imcs, mcs_table); available_bits = nr_get_G(nb_rb, nb_symb_sch, nb_re_dmrs, length_dmrs, mod_order, 1); TBS = nr_compute_tbs(mod_order,rate, nb_rb, nb_symb_sch, nb_re_dmrs*length_dmrs, 0, 0, Nl); printf("available bits %u TBS %u mod_order %d\n", available_bits, TBS, mod_order); //dlsch->harq_ids[subframe]= 0; rel15->rbSize = nb_rb; rel15->NrOfSymbols = nb_symb_sch; rel15->qamModOrder[0] = mod_order; rel15->nrOfLayers = Nl; rel15->TBSize[0] = TBS>>3; rel15->targetCodeRate[0] = rate; rel15->NrOfCodewords = 1; rel15->dmrsConfigType = NFAPI_NR_DMRS_TYPE1; rel15->dlDmrsSymbPos = 4; rel15->mcsIndex[0] = Imcs; rel15->numDmrsCdmGrpsNoData = 1; double *modulated_input = malloc16(sizeof(double) * 16 * 68 * 384); // [hna] 16 segments, 68*Zc short *channel_output_fixed = malloc16(sizeof(short) * 16 * 68 * 384); short *channel_output_uncoded = malloc16(sizeof(unsigned short) * 16 * 68 * 384); double errors_bit_uncoded = 0; //unsigned char *estimated_output; unsigned char *estimated_output_bit; unsigned char *test_input_bit; unsigned int errors_bit = 0; test_input_bit = (unsigned char *) malloc16(sizeof(unsigned char) * 16 * 68 * 384); //estimated_output = (unsigned char *) malloc16(sizeof(unsigned char) * 16 * 68 * 384); estimated_output_bit = (unsigned char *) malloc16(sizeof(unsigned char) * 16 * 68 * 384); NR_UE_DLSCH_t *dlsch0_ue = UE->dlsch[0][0][0]; NR_DL_UE_HARQ_t *harq_process = dlsch0_ue->harq_processes[harq_pid]; harq_process->mcs = Imcs; harq_process->mcs_table = mcs_table; harq_process->Nl = Nl; harq_process->nb_rb = nb_rb; harq_process->Qm = mod_order; harq_process->rvidx = rvidx; harq_process->R = rate; harq_process->dmrsConfigType = NFAPI_NR_DMRS_TYPE1; harq_process->dlDmrsSymbPos = 4; harq_process->n_dmrs_cdm_groups = 1; printf("harq process ue mcs = %d Qm = %d, symb %d\n", harq_process->mcs, harq_process->Qm, nb_symb_sch); unsigned char *test_input; test_input = (unsigned char *) malloc16(sizeof(unsigned char) * TBS / 8); for (i = 0; i < TBS / 8; i++) test_input[i] = (unsigned char) rand(); //estimated_output = harq_process->b; #ifdef DEBUG_NR_DLSCHSIM for (i = 0; i < TBS / 8; i++) printf("test_input[i]=%hhu \n",test_input[i]); #endif /*for (int i=0; i<TBS/8; i++) printf("test input[%d]=%d \n",i,test_input[i]);*/ //printf("crc32: [0]->0x%08x\n",crc24c(test_input, 32)); // generate signal if (input_fd == NULL) { nr_dlsch_encoding(gNB, test_input, frame, slot, dlsch, frame_parms,NULL,NULL,NULL,NULL,NULL,NULL,NULL); } for (SNR = snr0; SNR < snr1; SNR += snr_step) { n_errors = 0; n_false_positive = 0; for (trial = 0; trial < n_trials; trial++) { errors_bit_uncoded = 0; for (i = 0; i < available_bits; i++) { #ifdef DEBUG_CODER if ((i&0xf)==0) printf("\ne %d..%d: ",i,i+15); #endif //if (i<16) // printf("encoder output f[%d] = %d\n",i,dlsch->harq_processes[0]->f[i]); if (dlsch->harq_process.f[i] == 0) modulated_input[i] = 1.0; ///sqrt(2); //QPSK else modulated_input[i] = -1.0; ///sqrt(2); //if (i<16) printf("modulated_input[%d] = %d\n",i,modulated_input[i]); //SNR =10; SNR_lin = pow(10, SNR / 10.0); sigma = 1.0 / sqrt(2 * SNR_lin); channel_output_fixed[i] = (short) quantize(sigma / 4.0 / 4.0, modulated_input[i] + sigma * gaussdouble(0.0, 1.0), qbits); //channel_output_fixed[i] = (char)quantize8bit(sigma/4.0,(2.0*modulated_input[i]) - 1.0 + sigma*gaussdouble(0.0,1.0)); //printf("llr[%d]=%d\n",i,channel_output_fixed[i]); //printf("channel_output_fixed[%d]: %d\n",i,channel_output_fixed[i]); //channel_output_fixed[i] = (char)quantize(1,channel_output_fixed[i],qbits); /* if (i<16) printf("input[%d] %f => channel_output_fixed[%d] = %d\n", i,modulated_input[i], i,channel_output_fixed[i]); */ //Uncoded BER if (channel_output_fixed[i] < 0) channel_output_uncoded[i] = 1; //QPSK demod else channel_output_uncoded[i] = 0; if (channel_output_uncoded[i] != dlsch->harq_process.f[i]) errors_bit_uncoded = errors_bit_uncoded + 1; } //if (errors_bit_uncoded>10) //printf("errors bits uncoded %f\n", errors_bit_uncoded); #ifdef DEBUG_CODER printf("\n"); exit(-1); #endif vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_DLSCH_DECODING0, VCD_FUNCTION_IN); ret = nr_dlsch_decoding(UE, &proc, 0, channel_output_fixed, &UE->frame_parms, dlsch0_ue, dlsch0_ue->harq_processes[0], frame, nb_symb_sch, slot,harq_pid, is_crnti, llr8_flag); vcd_signal_dumper_dump_function_by_name(VCD_SIGNAL_DUMPER_FUNCTIONS_DLSCH_DECODING0, VCD_FUNCTION_OUT); if (ret > dlsch0_ue->max_ldpc_iterations) n_errors++; //count errors errors_bit = 0; for (i = 0; i < TBS; i++) { estimated_output_bit[i] = (dlsch0_ue->harq_processes[0]->b[i / 8] & (1 << (i & 7))) >> (i & 7); test_input_bit[i] = (test_input[i / 8] & (1 << (i & 7))) >> (i & 7); // Further correct for multiple segments if (estimated_output_bit[i] != test_input_bit[i]) { errors_bit++; //printf("estimated bits error occurs @%d ",i); } } if (errors_bit > 0) { n_false_positive++; if (n_trials == 1) printf("errors_bit %u (trial %d)\n", errors_bit, trial); } } printf("SNR %f, BLER %f (false positive %f)\n", SNR, (float) n_errors / (float) n_trials, (float) n_false_positive / (float) n_trials); if ((float) n_errors / (float) n_trials < target_error_rate) { printf("PDSCH test OK\n"); break; } } /*LOG_M("txsigF0.m","txsF0", gNB->common_vars.txdataF[0],frame_length_complex_samples_no_prefix,1,1); if (gNB->frame_parms.nb_antennas_tx>1) LOG_M("txsigF1.m","txsF1", gNB->common_vars.txdataF[1],frame_length_complex_samples_no_prefix,1,1);*/ //TODO: loop over slots /*for (aa=0; aa<gNB->frame_parms.nb_antennas_tx; aa++) { if (gNB_config->subframe_config.dl_cyclic_prefix_type.value == 1) { PHY_ofdm_mod(gNB->common_vars.txdataF[aa], txdata[aa], frame_parms->ofdm_symbol_size, 12, frame_parms->nb_prefix_samples, CYCLIC_PREFIX); } else { nr_normal_prefix_mod(gNB->common_vars.txdataF[aa], txdata[aa], 14, frame_parms); } } LOG_M("txsig0.m","txs0", txdata[0],frame_length_complex_samples,1,1); if (gNB->frame_parms.nb_antennas_tx>1) LOG_M("txsig1.m","txs1", txdata[1],frame_length_complex_samples,1,1); for (i=0; i<frame_length_complex_samples; i++) { for (aa=0; aa<frame_parms->nb_antennas_tx; aa++) { r_re[aa][i] = ((double)(((short *)txdata[aa]))[(i<<1)]); r_im[aa][i] = ((double)(((short *)txdata[aa]))[(i<<1)+1]); } }*/ for (i = 0; i < 2; i++) { printf("gNB %d\n", i); free_gNB_dlsch(&(gNB->dlsch[0][i]),N_RB_DL); printf("UE %d\n", i); free_nr_ue_dlsch(&(UE->dlsch[0][0][i]),N_RB_DL); } for (i = 0; i < 2; i++) { free(s_re[i]); free(s_im[i]); free(r_re[i]); free(r_im[i]); free(txdata[i]); } free(s_re); free(s_im); free(r_re); free(r_im); free(txdata); if (output_fd) fclose(output_fd); if (input_fd) fclose(input_fd); if (ouput_vcd) vcd_signal_dumper_close(); return (n_errors); }