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8f88efd97cf8a22e18a2a3fd10b934b79dc7566a
openairinterface5g/openair1/PHY/INIT/nr_parms.c
T
Bartosz Podrygajlo 8f88efd97c Add symbol timing functions for NR_DL_FRAME_PARMS 
Add two new functions for calculation symbol timestamp and symbol
duration for NR_DL_FRAME_PARMS. These functions are not using
the existing indirection mechanism via function pointers as this
prevents the compiler from properly optimizing the code.
2025-12-03 19:42:13 +01:00

639 lines
25 KiB
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 "nr_phy_init.h"
#include "common/utils/nr/nr_common.h"
#include "common/utils/LOG/log.h"
#include "executables/softmodem-common.h"
#include "PHY/MODULATION/nr_modulation.h"
/// Subcarrier spacings in Hz indexed by numerology index
static const uint32_t nr_subcarrier_spacing[MAX_NUM_SUBCARRIER_SPACING] = {15e3, 30e3, 60e3, 120e3, 240e3};
static const uint16_t nr_slots_per_subframe[MAX_NUM_SUBCARRIER_SPACING] = {1, 2, 4, 8, 16};
// Table 5.4.3.3-1 38-101
static const int nr_ssb_table[][3] = {
{1, 15, nr_ssb_type_A},
{2, 15, nr_ssb_type_A},
{3, 15, nr_ssb_type_A},
{5, 15, nr_ssb_type_A},
{5, 30, nr_ssb_type_B},
{7, 15, nr_ssb_type_A},
{8, 15, nr_ssb_type_A},
{12, 15, nr_ssb_type_A},
{13, 15, nr_ssb_type_A},
{14, 15, nr_ssb_type_A},
{18, 15, nr_ssb_type_A},
{20, 15, nr_ssb_type_A},
{24, 15, nr_ssb_type_A},
{24, 30, nr_ssb_type_B},
{25, 15, nr_ssb_type_A},
{26, 15, nr_ssb_type_A},
{28, 15, nr_ssb_type_A},
{29, 15, nr_ssb_type_A},
{30, 15, nr_ssb_type_A},
{34, 15, nr_ssb_type_A},
{34, 30, nr_ssb_type_C},
{38, 15, nr_ssb_type_A},
{38, 30, nr_ssb_type_C},
{39, 15, nr_ssb_type_A},
{39, 30, nr_ssb_type_C},
{40, 30, nr_ssb_type_C},
{41, 15, nr_ssb_type_A},
{41, 30, nr_ssb_type_C},
{46, 30, nr_ssb_type_C},
{48, 30, nr_ssb_type_C},
{50, 30, nr_ssb_type_C},
{51, 15, nr_ssb_type_A},
{53, 15, nr_ssb_type_A},
{53, 30, nr_ssb_type_C},
{65, 15, nr_ssb_type_A},
{66, 15, nr_ssb_type_A},
{66, 30, nr_ssb_type_B},
{67, 15, nr_ssb_type_A},
{70, 15, nr_ssb_type_A},
{71, 15, nr_ssb_type_A},
{74, 15, nr_ssb_type_A},
{75, 15, nr_ssb_type_A},
{76, 15, nr_ssb_type_A},
{77, 30, nr_ssb_type_C},
{78, 30, nr_ssb_type_C},
{79, 30, nr_ssb_type_C},
{85, 15, nr_ssb_type_A},
{90, 15, nr_ssb_type_A},
{90, 30, nr_ssb_type_C},
{91, 15, nr_ssb_type_A},
{92, 15, nr_ssb_type_A},
{93, 15, nr_ssb_type_A},
{94, 15, nr_ssb_type_A},
{96, 30, nr_ssb_type_C},
{100, 15, nr_ssb_type_A},
{101, 15, nr_ssb_type_A},
{101, 30, nr_ssb_type_C},
{102, 30, nr_ssb_type_C},
{104, 30, nr_ssb_type_C},
{254, 15, nr_ssb_type_A},
{254, 30, nr_ssb_type_C},
{255, 15, nr_ssb_type_A},
{255, 30, nr_ssb_type_B},
{256, 15, nr_ssb_type_A}};
void set_Lmax(NR_DL_FRAME_PARMS *fp) {
// 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;
}
}
int nr_get_ssb_start_symbol(const NR_DL_FRAME_PARMS *fp, uint8_t i_ssb)
{
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);
}
return symbol;
}
void set_scs_parameters (NR_DL_FRAME_PARMS *fp, int mu, int N_RB_DL)
{
int idx = 0;
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;
while (nr_ssb_table[idx][0] != fp->nr_band)
idx++;
AssertFatal(nr_ssb_table[idx][1] == 15,"SCS %d not applicable to band %d\n",
fp->subcarrier_spacing,fp->nr_band);
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];
while(nr_ssb_table[idx][0] != fp->nr_band ||
nr_ssb_table[idx][1] != 30) {
AssertFatal(nr_ssb_table[idx][0] <= fp->nr_band,
"SCS %d not applicable to band %d\n",
fp->subcarrier_spacing,
fp->nr_band);
idx++;
}
fp->ssb_type = nr_ssb_table[idx][2];
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];
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);
}
if(fp->threequarter_fs)
fp->ofdm_symbol_size = 3 * 128;
else
fp->ofdm_symbol_size = 4 * 128;
while(fp->ofdm_symbol_size < N_RB_DL * 12)
fp->ofdm_symbol_size <<= 1;
fp->first_carrier_offset = fp->ofdm_symbol_size - (N_RB_DL * 12 / 2);
fp->nb_prefix_samples = fp->ofdm_symbol_size / 128 * 9;
fp->nb_prefix_samples0 = fp->ofdm_symbol_size / 128 * (9 + (1 << mu));
LOG_I(PHY,
"Init: N_RB_DL %d, first_carrier_offset %d, nb_prefix_samples %d,nb_prefix_samples0 %d, ofdm_symbol_size %d\n",
N_RB_DL,
fp->first_carrier_offset,
fp->nb_prefix_samples,
fp->nb_prefix_samples0,
fp->ofdm_symbol_size);
}
void sl_set_scs_parameters (NR_DL_FRAME_PARMS *fp, int mu, int N_RB_SL)
{
AssertFatal(mu >= NR_MU_0 && mu <= NR_MU_4,"Invalid numerology index %d", mu);
fp->subcarrier_spacing = nr_subcarrier_spacing[mu];
fp->slots_per_subframe = nr_slots_per_subframe[mu];
if(fp->threequarter_fs)
fp->ofdm_symbol_size = 3 * 128;
else
fp->ofdm_symbol_size = 4 * 128;
while(fp->ofdm_symbol_size < N_RB_SL * 12)
fp->ofdm_symbol_size <<= 1;
fp->first_carrier_offset = fp->ofdm_symbol_size - (N_RB_SL * 12 / 2);
fp->nb_prefix_samples = fp->ofdm_symbol_size / 128 * 9;
fp->nb_prefix_samples0 = fp->ofdm_symbol_size / 128 * (9 + (1 << mu));
LOG_I(PHY,
"Init: N_RB_SL %d, first_carrier_offset %d, nb_prefix_samples %d,nb_prefix_samples0 %d, ofdm_symbol_size %d\n",
N_RB_SL,
fp->first_carrier_offset,
fp->nb_prefix_samples,
fp->nb_prefix_samples0,
fp->ofdm_symbol_size);
}
uint32_t get_samples_per_slot(int slot, const NR_DL_FRAME_PARMS *fp)
{
uint32_t samp_count;
if(fp->numerology_index == 0)
samp_count = fp->samples_per_subframe;
else
samp_count = (slot % (fp->slots_per_subframe / 2)) ? fp->samples_per_slotN0 : fp->samples_per_slot0;
return samp_count;
}
uint32_t get_samples_symbol_duration(const NR_DL_FRAME_PARMS *fp, int slot, int start_symbol, int num_symbols)
{
int end_symbol = start_symbol + num_symbols - 1;
AssertFatal(start_symbol <= end_symbol && start_symbol >= 0 && end_symbol < fp->symbols_per_slot,
"Symbol range is invalid start_symbol %d, num_symbols %d symbols_per_slot %d\n",
start_symbol,
num_symbols,
fp->symbols_per_slot);
if (num_symbols == fp->symbols_per_slot) {
return get_samples_per_slot(slot, fp);
}
uint32_t num_samples = 0;
int num_symbols_added = 0;
// Handle symbols with different nb_prefix_samples0
if (fp->numerology_index == 0) {
// Add symbol 0
if (start_symbol == 0) {
num_samples += fp->nb_prefix_samples0 + fp->ofdm_symbol_size;
num_symbols_added++;
}
// Add symbol 7
if (start_symbol <= 7 && end_symbol >= 7) {
num_samples += fp->nb_prefix_samples0 + fp->ofdm_symbol_size;
num_symbols_added++;
}
} else {
// Add first symbol
if (start_symbol == 0) {
num_samples += (slot % (fp->slots_per_subframe / 2)) ? fp->nb_prefix_samples : fp->nb_prefix_samples0;
num_samples += fp->ofdm_symbol_size;
num_symbols_added++;
}
}
int num_symbols_left = max(0, num_symbols - num_symbols_added);
num_samples += num_symbols_left * (fp->nb_prefix_samples + fp->ofdm_symbol_size);
return num_samples;
}
uint32_t get_samples_symbol_timestamp(const NR_DL_FRAME_PARMS *fp, int slot, int symbol)
{
if (symbol == 0) {
return 0;
}
return get_samples_symbol_duration(fp, slot, 0, symbol);
}
uint32_t get_slot_from_timestamp(openair0_timestamp timestamp_rx, const NR_DL_FRAME_PARMS *fp)
{
uint32_t slot_idx = 0;
int samples_till_the_slot = fp->get_samples_per_slot(slot_idx,fp)-1;
timestamp_rx = timestamp_rx%fp->samples_per_frame;
while (timestamp_rx > samples_till_the_slot) {
slot_idx++;
samples_till_the_slot += fp->get_samples_per_slot(slot_idx,fp);
}
return slot_idx;
}
uint32_t get_samples_slot_timestamp(int slot, const NR_DL_FRAME_PARMS *fp, unsigned int sl_ahead)
{
uint32_t samp_count = 0;
if(!sl_ahead) {
for(unsigned int idx_slot = 0; idx_slot < slot; idx_slot++)
samp_count += fp->get_samples_per_slot(idx_slot, fp);
} else {
for (unsigned int idx_slot = slot; idx_slot < slot + sl_ahead; idx_slot++)
samp_count += fp->get_samples_per_slot(idx_slot, fp);
}
return samp_count;
}
void nr_init_frame_parms(nfapi_nr_config_request_scf_t* cfg, NR_DL_FRAME_PARMS *fp)
{
AssertFatal (cfg, "Null pointer to cfg!\n");
fp->frame_type = cfg->cell_config.frame_duplex_type.value;
fp->L_ssb = (((uint64_t) cfg->ssb_table.ssb_mask_list[0].ssb_mask.value) << 32) | cfg->ssb_table.ssb_mask_list[1].ssb_mask.value;
fp->N_RB_DL = cfg->carrier_config.dl_grid_size[cfg->ssb_config.scs_common.value].value;
fp->N_RB_UL = cfg->carrier_config.ul_grid_size[cfg->ssb_config.scs_common.value].value;
int Ncp = NFAPI_CP_NORMAL;
int mu = cfg->ssb_config.scs_common.value;
LOG_I(PHY,"Initializing frame parms for mu %d, N_RB %d, Ncp %d\n", mu, fp->N_RB_DL, Ncp);
if (Ncp == NFAPI_CP_EXTENDED)
AssertFatal(mu == NR_MU_2,"Invalid cyclic prefix %d for numerology index %d\n", Ncp, mu);
fp->half_frame_bit = 0; // half frame bit initialized to 0 here
fp->numerology_index = mu;
set_scs_parameters(fp, mu, fp->N_RB_DL);
fp->slots_per_frame = 10* fp->slots_per_subframe;
fp->nb_antennas_rx = cfg->carrier_config.num_rx_ant.value; // It denotes the number of rx antennas at gNB
fp->nb_antennas_tx = cfg->carrier_config.num_tx_ant.value; // It corresponds to pdsch_AntennaPorts (logical antenna ports)
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_slotN0 = (fp->nb_prefix_samples + fp->ofdm_symbol_size) * fp->symbols_per_slot;
fp->samples_per_slot0 = 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->nb_prefix_samples0 + fp->ofdm_symbol_size) * 2 +
(fp->nb_prefix_samples + fp->ofdm_symbol_size) * (fp->symbols_per_slot * fp->slots_per_subframe - 2);
fp->get_samples_per_slot = &get_samples_per_slot;
fp->get_samples_slot_timestamp = &get_samples_slot_timestamp;
fp->get_slot_from_timestamp = &get_slot_from_timestamp;
fp->samples_per_frame = 10 * fp->samples_per_subframe;
fp->freq_range = get_freq_range_from_freq(fp->dl_CarrierFreq);
fp->Ncp = Ncp;
set_Lmax(fp);
fp->N_ssb = 0;
int num_tx_ant = cfg->carrier_config.num_tx_ant.value;
for (int p=0; p<num_tx_ant; p++)
fp->N_ssb += ((fp->L_ssb >> (63-p)) & 0x01);
fp->print_ue_help_cmdline_log = true;
}
int nr_init_frame_parms_ue(NR_DL_FRAME_PARMS *fp,
fapi_nr_config_request_t* config,
uint16_t nr_band)
{
uint8_t nb_ant_ports_gNB = 1;
uint8_t tdd_cfg = 3;
uint8_t Nid_cell = 0;
int Ncp = NORMAL;
if(fp->nb_antennas_rx == 0)
fp->nb_antennas_rx = 1;
if(fp->nb_antennas_tx == 0)
fp->nb_antennas_tx = 1;
// default values until overwritten by RRCConnectionReconfiguration
fp->nb_antenna_ports_gNB = nb_ant_ports_gNB;
fp->tdd_config = tdd_cfg;
fp->Nid_cell = Nid_cell;
fp->nr_band = nr_band;
LOG_I(PHY, "Initializing frame parms: set nb_antenna_ports_gNB %d, tdd_config, %d, Nid_cell %d\n", fp->nb_antenna_ports_gNB, fp->tdd_config, fp->Nid_cell);
uint64_t dl_bw_khz = (12*config->carrier_config.dl_grid_size[config->ssb_config.scs_common])*(15<<config->ssb_config.scs_common);
fp->dl_CarrierFreq = ((dl_bw_khz>>1) + config->carrier_config.dl_frequency)*1000 ;
LOG_D(PHY,"dl_bw_kHz %lu\n",dl_bw_khz);
LOG_D(PHY,"dl_CarrierFreq %lu\n",fp->dl_CarrierFreq);
uint64_t ul_bw_khz = (12*config->carrier_config.ul_grid_size[config->ssb_config.scs_common])*(15<<config->ssb_config.scs_common);
fp->ul_CarrierFreq = ((ul_bw_khz>>1) + config->carrier_config.uplink_frequency)*1000 ;
fp->numerology_index = config->ssb_config.scs_common;
fp->N_RB_UL = config->carrier_config.ul_grid_size[fp->numerology_index];
fp->N_RB_DL = config->carrier_config.dl_grid_size[fp->numerology_index];
fp->N_RB_SL = config->carrier_config.sl_grid_size[fp->numerology_index];
fp->frame_type = get_frame_type(fp->nr_band, fp->numerology_index);
int64_t uplink_frequency_offset = fp->ul_CarrierFreq - fp->dl_CarrierFreq;
uplink_frequency_offset *= 1000;
LOG_I(PHY, "Initializing frame parms: DL frequency %lu Hz, UL frequency %lu Hz: band %d, uldl offset %ld Hz\n", fp->dl_CarrierFreq, fp->ul_CarrierFreq, fp->nr_band, uplink_frequency_offset);
AssertFatal(fp->frame_type==config->cell_config.frame_duplex_type, "Invalid duplex type (frame_type %d,cell_config.frame_duplex_type %d) in config request file for band %d\n", fp->frame_type,config->cell_config.frame_duplex_type,fp->nr_band);
LOG_I(PHY,"Initializing frame parms for mu %d, N_RB %d, Ncp %d\n",fp->numerology_index, fp->N_RB_DL, Ncp);
if (Ncp == NFAPI_CP_EXTENDED)
AssertFatal(fp->numerology_index == NR_MU_2,"Invalid cyclic prefix %d for numerology index %d\n", Ncp, fp->numerology_index);
fp->Ncp = Ncp;
int N_RB = fp->N_RB_DL;
set_scs_parameters(fp, fp->numerology_index, N_RB);
fp->slots_per_frame = 10* fp->slots_per_subframe;
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_slotN0 = (fp->nb_prefix_samples + fp->ofdm_symbol_size) * fp->symbols_per_slot;
fp->samples_per_slot0 = 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->nb_prefix_samples0 + fp->ofdm_symbol_size) * 2 +
(fp->nb_prefix_samples + fp->ofdm_symbol_size) * (fp->symbols_per_slot * fp->slots_per_subframe - 2);
fp->get_samples_per_slot = &get_samples_per_slot;
fp->get_samples_slot_timestamp = &get_samples_slot_timestamp;
fp->samples_per_frame = 10 * fp->samples_per_subframe;
fp->freq_range = get_freq_range_from_freq(fp->dl_CarrierFreq);
uint8_t sco = 0;
if (((fp->freq_range == FR1) && (config->ssb_table.ssb_subcarrier_offset < 24)) ||
((fp->freq_range == FR2) && (config->ssb_table.ssb_subcarrier_offset < 12))) {
if (fp->freq_range == FR1)
sco = config->ssb_table.ssb_subcarrier_offset>>config->ssb_config.scs_common;
else
sco = config->ssb_table.ssb_subcarrier_offset;
}
fp->ssb_start_subcarrier = (12 * config->ssb_table.ssb_offset_point_a + sco);
set_Lmax(fp);
fp->L_ssb = (((uint64_t) config->ssb_table.ssb_mask_list[0].ssb_mask)<<32) | config->ssb_table.ssb_mask_list[1].ssb_mask;
fp->N_ssb = 0;
for (int p=0; p<fp->Lmax; p++)
fp->N_ssb += ((fp->L_ssb >> (63-p)) & 0x01);
return 0;
}
void nr_init_frame_parms_ue_sa(NR_DL_FRAME_PARMS *frame_parms, uint64_t downlink_frequency, int32_t delta_duplex, uint8_t mu, uint16_t nr_band) {
LOG_I(PHY,"SA init parameters. DL freq %lu UL offset %d SSB numerology %d N_RB_DL %d\n",
downlink_frequency,
delta_duplex,
mu,
frame_parms->N_RB_DL);
frame_parms->numerology_index = mu;
frame_parms->dl_CarrierFreq = downlink_frequency;
frame_parms->ul_CarrierFreq = downlink_frequency + delta_duplex;
if (get_softmodem_params()->sl_mode == 0) {
frame_parms->freq_range = get_freq_range_from_freq(frame_parms->dl_CarrierFreq);
}
frame_parms->N_RB_UL = frame_parms->N_RB_DL;
frame_parms->nr_band = nr_band;
frame_parms->frame_type = get_frame_type(frame_parms->nr_band, frame_parms->numerology_index);
frame_parms->Ncp = NORMAL;
set_scs_parameters(frame_parms, frame_parms->numerology_index, frame_parms->N_RB_DL);
set_Lmax(frame_parms);
frame_parms->slots_per_frame = 10* frame_parms->slots_per_subframe;
frame_parms->symbols_per_slot = ((frame_parms->Ncp == NORMAL)? 14 : 12); // to redefine for different slot formats
frame_parms->samples_per_subframe_wCP = frame_parms->ofdm_symbol_size * frame_parms->symbols_per_slot * frame_parms->slots_per_subframe;
frame_parms->samples_per_frame_wCP = 10 * frame_parms->samples_per_subframe_wCP;
frame_parms->samples_per_slot_wCP = frame_parms->symbols_per_slot*frame_parms->ofdm_symbol_size;
frame_parms->samples_per_slotN0 = (frame_parms->nb_prefix_samples + frame_parms->ofdm_symbol_size) * frame_parms->symbols_per_slot;
frame_parms->samples_per_slot0 = frame_parms->nb_prefix_samples0 + ((frame_parms->symbols_per_slot-1)*frame_parms->nb_prefix_samples) + (frame_parms->symbols_per_slot*frame_parms->ofdm_symbol_size);
frame_parms->samples_per_subframe = (frame_parms->nb_prefix_samples0 + frame_parms->ofdm_symbol_size) * 2 +
(frame_parms->nb_prefix_samples + frame_parms->ofdm_symbol_size) * (frame_parms->symbols_per_slot * frame_parms->slots_per_subframe - 2);
frame_parms->get_samples_per_slot = &get_samples_per_slot;
frame_parms->get_samples_slot_timestamp = &get_samples_slot_timestamp;
frame_parms->samples_per_frame = 10 * frame_parms->samples_per_subframe;
LOG_W(PHY, "samples_per_subframe %d/per second %d, wCP %d\n", frame_parms->samples_per_subframe, 1000*frame_parms->samples_per_subframe, frame_parms->samples_per_subframe_wCP);
}
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->dl_CarrierFreq=%lu\n",fp->dl_CarrierFreq);
LOG_I(PHY,"fp->ul_CarrierFreq=%lu\n",fp->ul_CarrierFreq);
LOG_I(PHY, "fp->Nid_cell=%d\n", fp->Nid_cell);
LOG_I(PHY, "fp->first_carrier_offset=%d\n", fp->first_carrier_offset);
LOG_I(PHY, "fp->ssb_start_subcarrier=%d\n", fp->ssb_start_subcarrier);
LOG_I(PHY, "fp->Ncp=%d\n", fp->Ncp);
LOG_I(PHY, "fp->N_RB_DL=%d\n", fp->N_RB_DL);
LOG_I(PHY, "fp->numerology_index=%d\n", fp->numerology_index);
LOG_I(PHY, "fp->nr_band=%d\n", fp->nr_band);
LOG_I(PHY, "fp->ofdm_offset_divisor=%d\n", fp->ofdm_offset_divisor);
LOG_I(PHY, "fp->threequarter_fs=%d\n", fp->threequarter_fs);
LOG_I(PHY, "fp->sl_CarrierFreq=%lu\n", fp->sl_CarrierFreq);
LOG_I(PHY, "fp->N_RB_SL=%d\n", fp->N_RB_SL);
}
int nr_init_frame_parms_ue_sl(NR_DL_FRAME_PARMS *fp,
sl_nr_phy_config_request_t *config,
int threequarter_fs,
uint32_t ofdm_offset_divisor)
{
// Set also these parameters here instead of some where else.
fp->ofdm_offset_divisor = ofdm_offset_divisor;
fp->threequarter_fs = threequarter_fs;
fp->nr_band = get_band(config->sl_carrier_config.sl_frequency, 0, 0, 0);
fp->att_rx = 0;
fp->att_tx = 0;
fp->nb_antennas_rx = config->sl_carrier_config.sl_num_rx_ant;
fp->nb_antennas_tx = config->sl_carrier_config.sl_num_tx_ant;
fp->numerology_index = config->sl_bwp_config.sl_scs;
fp->N_RB_SL = config->sl_carrier_config.sl_grid_size;
fp->N_RB_DL = fp->N_RB_SL;
fp->N_RB_UL = fp->N_RB_SL;
fp->Ncp = config->sl_bwp_config.sl_cyclic_prefix;
fp->frame_type = get_frame_type(fp->nr_band, fp->numerology_index);
uint64_t bw_khz = (12 * config->sl_carrier_config.sl_grid_size) * (15 << config->sl_bwp_config.sl_scs);
// REfer to section 3GPP spec 38.101 5.4E.2.1
// FrefV2x = Fref + deltashift + valueN*5Khz
uint32_t deltashift = (config->sl_carrier_config.sl_frequency_shift_7p5khz) ? 7500 : 0; // In Hz
deltashift += config->sl_carrier_config.sl_value_N * 5000; // In Hz
fp->sl_CarrierFreq = ((bw_khz >> 1) + config->sl_carrier_config.sl_frequency);
fp->sl_CarrierFreq += (deltashift >> 1);
fp->dl_CarrierFreq = fp->sl_CarrierFreq;
fp->ul_CarrierFreq = fp->sl_CarrierFreq;
LOG_D(PHY, "bw_kHz %lu, deltashift:%d Hz\n", bw_khz, deltashift);
LOG_D(PHY, "CarrierFreq %lu Hz\n", fp->sl_CarrierFreq);
LOG_I(PHY,
"Initializing frame parms: DL frequency %lu Hz, UL frequency %lu Hz SL frequency %lu Hz: band %d\n",
fp->dl_CarrierFreq,
fp->ul_CarrierFreq,
fp->sl_CarrierFreq,
fp->nr_band);
AssertFatal(fp->frame_type == TDD, "Sidelink bands only support TDD");
LOG_I(PHY, "Initializing frame parms for mu %d, N_RB %d, Ncp %d\n", fp->numerology_index, fp->N_RB_DL, fp->Ncp);
if (fp->Ncp == EXTENDED)
AssertFatal(fp->numerology_index == NR_MU_2,
"Invalid cyclic prefix %d for numerology index %d\n",
fp->Ncp,
fp->numerology_index);
sl_set_scs_parameters(fp, fp->numerology_index, fp->N_RB_SL);
fp->slots_per_frame = 10 * fp->slots_per_subframe;
fp->symbols_per_slot = ((fp->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_slotN0 = (fp->nb_prefix_samples + fp->ofdm_symbol_size) * fp->symbols_per_slot;
fp->samples_per_slot0 =
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->nb_prefix_samples0 + fp->ofdm_symbol_size) * 2
+ (fp->nb_prefix_samples + fp->ofdm_symbol_size) * (fp->symbols_per_slot * fp->slots_per_subframe - 2);
fp->get_samples_per_slot = &get_samples_per_slot;
fp->get_samples_slot_timestamp = &get_samples_slot_timestamp;
fp->samples_per_frame = 10 * fp->samples_per_subframe;
fp->freq_range = get_freq_range_from_freq(fp->sl_CarrierFreq);
// ssb_offset_pointa points to the first RE where Sidelink-PSBCH starts
fp->ssb_start_subcarrier = config->sl_bwp_config.sl_ssb_offset_point_a;
perform_symbol_rotation(fp, fp->sl_CarrierFreq, fp->symbol_rotation[link_type_sl]);
init_timeshift_rotation(fp);
// Not used for Sidelink
fp->Lmax = 0;
fp->L_ssb = 0;
fp->N_ssb = 0;
fp->half_frame_bit = 0;
fp->ssb_index = 0;
fp->ssb_type = 0;
LOG_I(PHY, "Dumping Sidelink Frame Parameters\n");
nr_dump_frame_parms(fp);
return 0;
}
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