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openairinterface5g/openair1/PHY/INIT/nr_parms.c
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/*
* 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;
// Initial bandwidth part configuration -- full carrier bandwidth
fp->initial_bwp_dl.bwp_id = 0;
fp->initial_bwp_dl.scs = fp->subcarrier_spacing;
fp->initial_bwp_dl.location = 0;
fp->initial_bwp_dl.N_RB = fp->N_RB_DL;
fp->initial_bwp_dl.cyclic_prefix = fp->Ncp;
fp->initial_bwp_dl.ofdm_symbol_size = fp->ofdm_symbol_size;
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);
LOG_I(PHY,"fp->initial_bwp_dl.bwp_id=%d\n",fp->initial_bwp_dl.bwp_id);
LOG_I(PHY,"fp->initial_bwp_dl.scs=%d\n",fp->initial_bwp_dl.scs);
LOG_I(PHY,"fp->initial_bwp_dl.N_RB=%d\n",fp->initial_bwp_dl.N_RB);
LOG_I(PHY,"fp->initial_bwp_dl.cyclic_prefix=%d\n",fp->initial_bwp_dl.cyclic_prefix);
LOG_I(PHY,"fp->initial_bwp_dl.location=%d\n",fp->initial_bwp_dl.location);
LOG_I(PHY,"fp->initial_bwp_dl.ofdm_symbol_size=%d\n",fp->initial_bwp_dl.ofdm_symbol_size);
}
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