/* * 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 "phy_init.h" #include "common/utils/LOG/log.h" /// Subcarrier spacings in Hz indexed by numerology index uint32_t nr_subcarrier_spacing[MAX_NUM_SUBCARRIER_SPACING] = {15e3, 30e3, 60e3, 120e3, 240e3}; uint16_t nr_slots_per_subframe[MAX_NUM_SUBCARRIER_SPACING] = {1, 2, 4, 16, 32}; int nr_get_ssb_start_symbol(NR_DL_FRAME_PARMS *fp, uint8_t i_ssb, uint8_t half_frame_index) { int mu = fp->numerology_index; int symbol = 0; uint8_t n, n_temp; nr_ssb_type_e type = fp->ssb_type; int case_AC[2] = {2,8}; int case_BD[4] = {4,8,16,20}; int case_E[8] = {8, 12, 16, 20, 32, 36, 40, 44}; switch(mu) { case NR_MU_0: // case A n = i_ssb >> 1; symbol = case_AC[i_ssb % 2] + 14*n; break; case NR_MU_1: if (type == 1){ // case B n = i_ssb >> 2; symbol = case_BD[i_ssb % 4] + 28*n; } if (type == 2){ // case C n = i_ssb >> 1; symbol = case_AC[i_ssb % 2] + 14*n; } break; case NR_MU_3: // case D n_temp = i_ssb >> 2; n = n_temp + (n_temp >> 2); symbol = case_BD[i_ssb % 4] + 28*n; break; case NR_MU_4: // case E n_temp = i_ssb >> 3; n = n_temp + (n_temp >> 2); symbol = case_E[i_ssb % 8] + 56*n; break; default: AssertFatal(0==1, "Invalid numerology index %d for the synchronization block\n", mu); } if (half_frame_index) symbol += (5 * fp->symbols_per_slot * fp->slots_per_subframe); return symbol; } int nr_init_frame_parms0(NR_DL_FRAME_PARMS *fp, int mu, int Ncp, int N_RB_DL) { #if DISABLE_LOG_X printf("Initializing frame parms for mu %d, N_RB %d, Ncp %d\n",mu, N_RB_DL, Ncp); #else LOG_I(PHY,"Initializing frame parms for mu %d, N_RB %d, Ncp %d\n",mu, N_RB_DL, Ncp); #endif if (Ncp == NFAPI_CP_EXTENDED) AssertFatal(mu == NR_MU_2,"Invalid cyclic prefix %d for numerology index %d\n", Ncp, mu); fp->numerology_index = mu; fp->Ncp = Ncp; fp->N_RB_DL = N_RB_DL; switch(mu) { case NR_MU_0: //15kHz scs fp->subcarrier_spacing = nr_subcarrier_spacing[NR_MU_0]; fp->slots_per_subframe = nr_slots_per_subframe[NR_MU_0]; fp->ssb_type = nr_ssb_type_A; break; case NR_MU_1: //30kHz scs fp->subcarrier_spacing = nr_subcarrier_spacing[NR_MU_1]; fp->slots_per_subframe = nr_slots_per_subframe[NR_MU_1]; // selection of SS block pattern according to TS 38101-1 Table 5.4.3.3-1 for SCS 30kHz if (fp->eutra_band == 5 || fp->eutra_band == 66) fp->ssb_type = nr_ssb_type_B; else{ if (fp->eutra_band == 41 || ( fp->eutra_band > 76 && fp->eutra_band < 80) ) fp->ssb_type = nr_ssb_type_C; else AssertFatal(1==0,"NR Operating Band n%d not available for SS block SCS with mu=%d\n", fp->eutra_band, mu); } switch(N_RB_DL){ case 11: case 24: case 38: case 78: case 51: case 65: case 106: //40 MHz if (fp->threequarter_fs) { fp->ofdm_symbol_size = 1536; fp->first_carrier_offset = 900; //1536 - 636 fp->nb_prefix_samples0 = 132; fp->nb_prefix_samples = 108; } else { fp->ofdm_symbol_size = 2048; fp->first_carrier_offset = 1412; //2048 - 636 fp->nb_prefix_samples0 = 176; fp->nb_prefix_samples = 144; } break; case 133: case 162: case 189: case 217: //80 MHz if (fp->threequarter_fs) { fp->ofdm_symbol_size = 3072; fp->first_carrier_offset = 1770; //3072 - 1302 fp->nb_prefix_samples0 = 264; fp->nb_prefix_samples = 216; } else { fp->ofdm_symbol_size = 4096; fp->first_carrier_offset = 2794; //4096 - 1302 fp->nb_prefix_samples0 = 352; fp->nb_prefix_samples = 288; } break; case 245: AssertFatal(fp->threequarter_fs==0,"3/4 sampling impossible for N_RB %d and MU %d\n",N_RB_DL,mu); fp->ofdm_symbol_size = 4096; fp->first_carrier_offset = 2626; //4096 - 1478 fp->nb_prefix_samples0 = 352; fp->nb_prefix_samples = 288; break; case 273: AssertFatal(fp->threequarter_fs==0,"3/4 sampling impossible for N_RB %d and MU %d\n",N_RB_DL,mu); fp->ofdm_symbol_size = 4096; fp->first_carrier_offset = 2458; //4096 - 1638 fp->nb_prefix_samples0 = 352; fp->nb_prefix_samples = 288; break; default: AssertFatal(1==0,"Number of resource blocks %d undefined for mu %d, frame parms = %p\n", N_RB_DL, mu, fp); } break; case NR_MU_2: //60kHz scs fp->subcarrier_spacing = nr_subcarrier_spacing[NR_MU_2]; fp->slots_per_subframe = nr_slots_per_subframe[NR_MU_2]; switch(N_RB_DL){ //FR1 bands only case 11: case 18: case 38: case 24: case 31: case 51: case 65: case 79: case 93: case 107: case 121: case 135: default: AssertFatal(1==0,"Number of resource blocks %d undefined for mu %d, frame parms = %p\n", N_RB_DL, mu, fp); } break; case NR_MU_3: fp->subcarrier_spacing = nr_subcarrier_spacing[NR_MU_3]; fp->slots_per_subframe = nr_slots_per_subframe[NR_MU_3]; fp->ssb_type = nr_ssb_type_D; break; case NR_MU_4: fp->subcarrier_spacing = nr_subcarrier_spacing[NR_MU_4]; fp->slots_per_subframe = nr_slots_per_subframe[NR_MU_4]; fp->ssb_type = nr_ssb_type_E; break; default: AssertFatal(1==0,"Invalid numerology index %d", mu); } fp->slots_per_frame = 10* fp->slots_per_subframe; fp->nb_antenna_ports_eNB = 1; // default value until overwritten by RRCConnectionReconfiguration fp->symbols_per_slot = ((Ncp == NORMAL)? 14 : 12); // to redefine for different slot formats fp->samples_per_subframe_wCP = fp->ofdm_symbol_size * fp->symbols_per_slot * fp->slots_per_subframe; fp->samples_per_frame_wCP = 10 * fp->samples_per_subframe_wCP; fp->samples_per_slot_wCP = fp->symbols_per_slot*fp->ofdm_symbol_size; fp->samples_per_slot = fp->nb_prefix_samples0 + ((fp->symbols_per_slot-1)*fp->nb_prefix_samples) + (fp->symbols_per_slot*fp->ofdm_symbol_size); fp->samples_per_subframe = (fp->samples_per_subframe_wCP + (fp->nb_prefix_samples0 * fp->slots_per_subframe) + (fp->nb_prefix_samples * fp->slots_per_subframe * (fp->symbols_per_slot - 1))); fp->samples_per_frame = 10 * fp->samples_per_subframe; fp->freq_range = (fp->dl_CarrierFreq < 6e9)? nr_FR1 : nr_FR2; // definition of Lmax according to ts 38.213 section 4.1 if (fp->dl_CarrierFreq < 6e9){ if(fp->frame_type && (fp->ssb_type==2)) fp->Lmax = (fp->dl_CarrierFreq < 2.4e9)? 4 : 8; else fp->Lmax = (fp->dl_CarrierFreq < 3e9)? 4 : 8; } else fp->Lmax = 64; return 0; } int nr_init_frame_parms(nfapi_nr_config_request_t* config, NR_DL_FRAME_PARMS *fp) { fp->eutra_band = config->nfapi_config.rf_bands.rf_band[0]; fp->frame_type = !(config->subframe_config.duplex_mode.value); fp->L_ssb = config->sch_config.ssb_scg_position_in_burst.value; return nr_init_frame_parms0(fp, config->subframe_config.numerology_index_mu.value, config->subframe_config.dl_cyclic_prefix_type.value, config->rf_config.dl_carrier_bandwidth.value); } int nr_init_frame_parms_ue(NR_DL_FRAME_PARMS *fp, int mu, int Ncp, int N_RB_DL, int n_ssb_crb, int ssb_subcarrier_offset) { /*n_ssb_crb and ssb_subcarrier_offset are given in 15kHz SCS*/ nr_init_frame_parms0(fp,mu,Ncp,N_RB_DL); fp->ssb_start_subcarrier = (12 * n_ssb_crb + ssb_subcarrier_offset)/(1<<mu); return 0; } void nr_dump_frame_parms(NR_DL_FRAME_PARMS *fp) { LOG_I(PHY,"fp->scs=%d\n",fp->subcarrier_spacing); LOG_I(PHY,"fp->ofdm_symbol_size=%d\n",fp->ofdm_symbol_size); LOG_I(PHY,"fp->nb_prefix_samples0=%d\n",fp->nb_prefix_samples0); LOG_I(PHY,"fp->nb_prefix_samples=%d\n",fp->nb_prefix_samples); LOG_I(PHY,"fp->slots_per_subframe=%d\n",fp->slots_per_subframe); LOG_I(PHY,"fp->samples_per_subframe_wCP=%d\n",fp->samples_per_subframe_wCP); LOG_I(PHY,"fp->samples_per_frame_wCP=%d\n",fp->samples_per_frame_wCP); LOG_I(PHY,"fp->samples_per_subframe=%d\n",fp->samples_per_subframe); LOG_I(PHY,"fp->samples_per_frame=%d\n",fp->samples_per_frame); }