/** * * \section COPYRIGHT * * Copyright 2013-2020 Software Radio Systems Limited * * By using this file, you agree to the terms and conditions set * forth in the LICENSE file which can be found at the top level of * the distribution. * */ #include "srslte/phy/enb/enb_dl_nr.h" #include "srslte/phy/phch/ra_dl_nr.h" #include "srslte/phy/phch/ra_nr.h" #include "srslte/phy/ue/ue_dl_nr.h" #include "srslte/phy/utils/debug.h" #include "srslte/phy/utils/random.h" #include "srslte/phy/utils/vector.h" #include static srslte_carrier_nr_t carrier = { 0, // cell_id 0, // numerology 100, // nof_prb 0, // start 1 // max_mimo_layers }; static uint32_t n_prb = 0; // Set to 0 for steering static uint32_t mcs = 30; // Set to 30 for steering static srslte_sch_cfg_nr_t pdsch_cfg = {}; static srslte_sch_grant_nr_t pdsch_grant = {}; static uint16_t rnti = 0x1234; static uint32_t nof_slots = 10; void usage(char* prog) { printf("Usage: %s [pTL] \n", prog); printf("\t-P Number of BWP (Carrier) PRB [Default %d]\n", carrier.nof_prb); printf("\t-p Number of grant PRB, set to 0 for steering [Default %d]\n", n_prb); printf("\t-n Number of slots to simulate [Default %d]\n", nof_slots); printf("\t-m MCS PRB, set to >28 for steering [Default %d]\n", mcs); printf("\t-T Provide MCS table (64qam, 256qam, 64qamLowSE) [Default %s]\n", srslte_mcs_table_to_str(pdsch_cfg.sch_cfg.mcs_table)); printf("\t-L Provide number of layers [Default %d]\n", carrier.max_mimo_layers); printf("\t-v [set srslte_verbose to debug, default none]\n"); } int parse_args(int argc, char** argv) { int opt; while ((opt = getopt(argc, argv, "PpmnTLv")) != -1) { switch (opt) { case 'P': carrier.nof_prb = (uint32_t)strtol(argv[optind], NULL, 10); break; case 'p': n_prb = (uint32_t)strtol(argv[optind], NULL, 10); break; case 'n': nof_slots = (uint32_t)strtol(argv[optind], NULL, 10); break; case 'm': mcs = (uint32_t)strtol(argv[optind], NULL, 10); break; case 'T': pdsch_cfg.sch_cfg.mcs_table = srslte_mcs_table_from_str(argv[optind]); break; case 'L': carrier.max_mimo_layers = (uint32_t)strtol(argv[optind], NULL, 10); break; case 'v': srslte_verbose++; break; default: usage(argv[0]); return SRSLTE_ERROR; } } return SRSLTE_SUCCESS; } int work_gnb_dl(srslte_enb_dl_nr_t* enb_dl, srslte_dl_slot_cfg_t* slot, srslte_search_space_t* search_space, srslte_dci_dl_nr_t* dci_dl, srslte_dci_location_t* dci_location, uint8_t** data_tx) { if (srslte_enb_dl_nr_base_zero(enb_dl) < SRSLTE_SUCCESS) { ERROR("Error setting base to zero\n"); return SRSLTE_ERROR; } // Hard-coded values dci_dl->format = srslte_dci_format_nr_1_0; dci_dl->rnti_type = srslte_rnti_type_c; dci_dl->location = *dci_location; dci_dl->search_space = *search_space; dci_dl->rnti = rnti; // Put actual DCI if (srslte_enb_dl_nr_pdcch_put(enb_dl, slot, dci_dl) < SRSLTE_SUCCESS) { ERROR("Error putting PDCCH\n"); return SRSLTE_ERROR; } // Put PDSCH transmission pdsch_cfg.grant = pdsch_grant; if (srslte_enb_dl_nr_pdsch_put(enb_dl, slot, &pdsch_cfg, data_tx) < SRSLTE_SUCCESS) { ERROR("Error putting PDSCH\n"); return SRSLTE_ERROR; } srslte_enb_dl_nr_gen_signal(enb_dl); return SRSLTE_SUCCESS; } int work_ue_dl(srslte_ue_dl_nr_t* ue_dl, srslte_dl_slot_cfg_t* slot, srslte_search_space_t* search_space, srslte_pdsch_res_nr_t* pdsch_res) { srslte_ue_dl_nr_estimate_fft(ue_dl, slot); srslte_dci_dl_nr_t dci_dl_rx = {}; int nof_found_dci = srslte_ue_dl_nr_find_dl_dci(ue_dl, search_space, slot, rnti, &dci_dl_rx, 1); if (nof_found_dci < SRSLTE_SUCCESS) { ERROR("Error decoding\n"); return SRSLTE_ERROR; } if (nof_found_dci < 1) { ERROR("Error DCI not found\n"); return SRSLTE_ERROR; } pdsch_cfg.grant = pdsch_grant; if (srslte_ue_dl_nr_decode_pdsch(ue_dl, slot, &pdsch_cfg, pdsch_res) < SRSLTE_SUCCESS) { ERROR("Error decoding\n"); return SRSLTE_ERROR; } return SRSLTE_SUCCESS; } int main(int argc, char** argv) { int ret = SRSLTE_ERROR; srslte_enb_dl_nr_t enb_dl = {}; srslte_ue_dl_nr_t ue_dl = {}; srslte_pdsch_res_nr_t pdsch_res[SRSLTE_MAX_TB] = {}; srslte_random_t rand_gen = srslte_random_init(1234); srslte_dl_slot_cfg_t slot = {}; struct timeval t[3] = {}; uint64_t pdsch_encode_us = 0; uint64_t pdsch_decode_us = 0; uint64_t nof_bits = 0; uint8_t* data_tx[SRSLTE_MAX_TB] = {}; uint8_t* data_rx[SRSLTE_MAX_CODEWORDS] = {}; cf_t* buffer = NULL; buffer = srslte_vec_cf_malloc(SRSLTE_SF_LEN_PRB(carrier.nof_prb)); if (buffer == NULL) { ERROR("Error malloc\n"); goto clean_exit; } srslte_ue_dl_nr_args_t ue_dl_args = {}; ue_dl_args.nof_rx_antennas = 1; ue_dl_args.pdsch.sch.disable_simd = false; ue_dl_args.pdsch.sch.decoder_use_flooded = false; ue_dl_args.pdsch.measure_evm = true; ue_dl_args.pdcch.disable_simd = false; ue_dl_args.pdcch.measure_evm = true; ue_dl_args.nof_max_prb = carrier.nof_prb; srslte_enb_dl_nr_args_t enb_dl_args = {}; enb_dl_args.nof_tx_antennas = 1; enb_dl_args.pdsch.sch.disable_simd = false; enb_dl_args.pdcch.disable_simd = false; enb_dl_args.nof_max_prb = carrier.nof_prb; // Set default PDSCH configuration pdsch_cfg.sch_cfg.mcs_table = srslte_mcs_table_64qam; if (parse_args(argc, argv) < SRSLTE_SUCCESS) { goto clean_exit; } // Configure CORESET srslte_coreset_t coreset = {}; coreset.duration = 2; for (uint32_t i = 0; i < SRSLTE_CORESET_FREQ_DOMAIN_RES_SIZE; i++) { coreset.freq_resources[i] = i < carrier.nof_prb / 6; } // Configure Search Space srslte_search_space_t search_space = {}; search_space.type = srslte_search_space_type_ue; for (uint32_t L = 0; L < SRSLTE_SEARCH_SPACE_NOF_AGGREGATION_LEVELS_NR; L++) { search_space.nof_candidates[L] = srslte_pdcch_nr_max_candidates_coreset(&coreset, L); } if (srslte_ue_dl_nr_init(&ue_dl, &buffer, &ue_dl_args)) { ERROR("Error UE DL\n"); goto clean_exit; } if (srslte_enb_dl_nr_init(&enb_dl, &buffer, &enb_dl_args)) { ERROR("Error UE DL\n"); goto clean_exit; } if (srslte_ue_dl_nr_set_carrier(&ue_dl, &carrier)) { ERROR("Error setting SCH NR carrier\n"); goto clean_exit; } if (srslte_ue_dl_nr_set_coreset(&ue_dl, &coreset)) { ERROR("Error setting CORESET\n"); goto clean_exit; } if (srslte_enb_dl_nr_set_carrier(&enb_dl, &carrier)) { ERROR("Error setting SCH NR carrier\n"); goto clean_exit; } if (srslte_enb_dl_nr_set_coreset(&enb_dl, &coreset)) { ERROR("Error setting CORESET\n"); goto clean_exit; } for (uint32_t i = 0; i < 1; i++) { data_tx[i] = srslte_vec_u8_malloc(SRSLTE_SLOT_MAX_NOF_BITS_NR); data_rx[i] = srslte_vec_u8_malloc(SRSLTE_SLOT_MAX_NOF_BITS_NR); if (data_tx[i] == NULL || data_rx[i] == NULL) { ERROR("Error malloc\n"); goto clean_exit; } pdsch_res[i].payload = data_rx[i]; } srslte_softbuffer_tx_t softbuffer_tx = {}; srslte_softbuffer_rx_t softbuffer_rx = {}; if (srslte_softbuffer_tx_init_guru(&softbuffer_tx, SRSLTE_SCH_NR_MAX_NOF_CB_LDPC, SRSLTE_LDPC_MAX_LEN_ENCODED_CB) < SRSLTE_SUCCESS) { ERROR("Error init soft-buffer\n"); goto clean_exit; } if (srslte_softbuffer_rx_init_guru(&softbuffer_rx, SRSLTE_SCH_NR_MAX_NOF_CB_LDPC, SRSLTE_LDPC_MAX_LEN_ENCODED_CB) < SRSLTE_SUCCESS) { ERROR("Error init soft-buffer\n"); goto clean_exit; } // Use grant default A time resources with m=0 if (srslte_ra_dl_nr_time_default_A(0, pdsch_cfg.dmrs_typeA.typeA_pos, &pdsch_grant) < SRSLTE_SUCCESS) { ERROR("Error loading default grant\n"); goto clean_exit; } pdsch_grant.nof_layers = carrier.max_mimo_layers; pdsch_grant.dci_format = srslte_dci_format_nr_1_0; pdsch_grant.nof_dmrs_cdm_groups_without_data = 1; uint32_t n_prb_start = 1; uint32_t n_prb_end = carrier.nof_prb + 1; if (n_prb > 0) { n_prb_start = SRSLTE_MIN(n_prb, n_prb_end - 1); n_prb_end = SRSLTE_MIN(n_prb + 1, n_prb_end); } uint32_t mcs_start = 0; uint32_t mcs_end = pdsch_cfg.sch_cfg.mcs_table == srslte_mcs_table_256qam ? 28 : 29; if (mcs < mcs_end) { mcs_start = SRSLTE_MIN(mcs, mcs_end - 1); mcs_end = SRSLTE_MIN(mcs + 1, mcs_end); } uint64_t slot_count = 0; for (slot.idx = 0; slot.idx < nof_slots; slot.idx++) { for (n_prb = n_prb_start; n_prb < n_prb_end; n_prb++) { for (mcs = mcs_start; mcs < mcs_end; mcs++, slot_count++) { for (uint32_t n = 0; n < SRSLTE_MAX_PRB_NR; n++) { pdsch_grant.prb_idx[n] = (n < n_prb); } if (srslte_ra_nr_fill_tb(&pdsch_cfg, &pdsch_grant, mcs, &pdsch_grant.tb[0]) < SRSLTE_SUCCESS) { ERROR("Error filing tb\n"); goto clean_exit; } for (uint32_t tb = 0; tb < SRSLTE_MAX_TB; tb++) { // Skip TB if no allocated if (data_tx[tb] == NULL) { continue; } for (uint32_t i = 0; i < pdsch_grant.tb[tb].tbs; i++) { data_tx[tb][i] = (uint8_t)srslte_random_uniform_int_dist(rand_gen, 0, UINT8_MAX); } pdsch_grant.tb[tb].softbuffer.tx = &softbuffer_tx; } // Compute PDCCH candidate locations uint32_t L = 0; uint32_t ncce_candidates[SRSLTE_SEARCH_SPACE_MAX_NOF_CANDIDATES_NR] = {}; int nof_candidates = srslte_pdcch_nr_locations_coreset(&coreset, &search_space, rnti, L, slot.idx, ncce_candidates); if (nof_candidates < SRSLTE_SUCCESS) { ERROR("Error getting PDCCH candidates\n"); goto clean_exit; } // Setup DCI location srslte_dci_location_t dci_location = {}; dci_location.ncce = ncce_candidates[0]; dci_location.L = L; // Setup DCI srslte_dci_dl_nr_t dci_dl = {}; gettimeofday(&t[1], NULL); if (work_gnb_dl(&enb_dl, &slot, &search_space, &dci_dl, &dci_location, data_tx) < SRSLTE_ERROR) { ERROR("Error running eNb DL\n"); goto clean_exit; } gettimeofday(&t[2], NULL); get_time_interval(t); pdsch_encode_us += (size_t)(t[0].tv_sec * 1e6 + t[0].tv_usec); for (uint32_t tb = 0; tb < SRSLTE_MAX_TB; tb++) { pdsch_grant.tb[tb].softbuffer.rx = &softbuffer_rx; srslte_softbuffer_rx_reset(pdsch_grant.tb[tb].softbuffer.rx); } gettimeofday(&t[1], NULL); if (work_ue_dl(&ue_dl, &slot, &search_space, pdsch_res) < SRSLTE_SUCCESS) { ERROR("Error running UE DL\n"); goto clean_exit; } gettimeofday(&t[2], NULL); get_time_interval(t); pdsch_decode_us += (size_t)(t[0].tv_sec * 1e6 + t[0].tv_usec); if (pdsch_res->evm > 0.001f) { ERROR("Error PDSCH EVM is too high %f\n", pdsch_res->evm); goto clean_exit; } if (!pdsch_res[0].crc) { ERROR("Failed to match CRC; n_prb=%d; mcs=%d; TBS=%d;\n", n_prb, mcs, pdsch_grant.tb[0].tbs); goto clean_exit; } if (memcmp(data_tx[0], data_rx[0], pdsch_grant.tb[0].tbs / 8) != 0) { ERROR("Failed to match Tx/Rx data; n_prb=%d; mcs=%d; TBS=%d;\n", n_prb, mcs, pdsch_grant.tb[0].tbs); printf("Tx data: "); srslte_vec_fprint_byte(stdout, data_tx[0], pdsch_grant.tb[0].tbs / 8); printf("Rx data: "); srslte_vec_fprint_byte(stdout, data_rx[0], pdsch_grant.tb[0].tbs / 8); goto clean_exit; } INFO("n_prb=%d; mcs=%d; TBS=%d; EVM=%f; PASSED!\n", n_prb, mcs, pdsch_grant.tb[0].tbs, pdsch_res[0].evm); // Count the Tx/Rx'd number of bits nof_bits += pdsch_grant.tb[0].tbs; } } } printf("[Rates in Mbps] Granted Processed\n"); printf(" eNb: %5.1f %5.1f\n", (double)nof_bits / (double)slot_count / 1000.0f, (double)nof_bits / pdsch_encode_us); printf(" UE: %5.1f %5.1f\n", (double)nof_bits / (double)slot_count / 1000.0f, (double)nof_bits / pdsch_decode_us); ret = SRSLTE_SUCCESS; clean_exit: srslte_random_free(rand_gen); srslte_enb_dl_nr_free(&enb_dl); srslte_ue_dl_nr_free(&ue_dl); for (uint32_t i = 0; i < SRSLTE_MAX_CODEWORDS; i++) { if (data_tx[i]) { free(data_tx[i]); } if (data_rx[i]) { free(data_rx[i]); } } if (buffer) { free(buffer); } srslte_softbuffer_tx_free(&softbuffer_tx); srslte_softbuffer_rx_free(&softbuffer_rx); return ret; }