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openairinterface5g/openair1/SCHED_NR/phy_procedures_nr_gNB.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/phy_extern.h"
#include "PHY/defs_gNB.h"
#include "sched_nr.h"
#include "PHY/NR_REFSIG/dmrs_nr.h"
#include "PHY/NR_TRANSPORT/nr_transport.h"
#include "PHY/NR_TRANSPORT/nr_transport_proto.h"
#include "PHY/NR_TRANSPORT/nr_dlsch.h"
#include "PHY/NR_TRANSPORT/nr_ulsch.h"
#include "PHY/NR_ESTIMATION/nr_ul_estimation.h"
#include "SCHED/sched_eNB.h"
#include "sched_nr.h"
#include "SCHED/sched_common_extern.h"
#include "nfapi/open-nFAPI/nfapi/public_inc/nfapi_interface.h"
#include "nfapi/open-nFAPI/nfapi/public_inc/nfapi_nr_interface.h"
#include "fapi_nr_l1.h"
#include "common/utils/LOG/log.h"
#include "common/utils/LOG/vcd_signal_dumper.h"
#include "PHY/INIT/phy_init.h"
#include "PHY/MODULATION/nr_modulation.h"
#include "T.h"
#include "assertions.h"
#include "msc.h"
#include <time.h>
#if defined(ENABLE_ITTI)
#include "intertask_interface.h"
#endif
uint8_t SSB_Table[38]={0,2,4,6,8,10,12,14,254,254,16,18,20,22,24,26,28,30,254,254,32,34,36,38,40,42,44,46,254,254,48,50,52,54,56,58,60,62};
extern uint8_t nfapi_mode;
void nr_set_ssb_first_subcarrier(nfapi_nr_config_request_scf_t *cfg, NR_DL_FRAME_PARMS *fp) {
uint8_t sco = 0;
if (((fp->freq_range == nr_FR1) && (cfg->ssb_table.ssb_subcarrier_offset.value<24)) ||
((fp->freq_range == nr_FR2) && (cfg->ssb_table.ssb_subcarrier_offset.value<12)) )
sco = cfg->ssb_table.ssb_subcarrier_offset.value;
fp->ssb_start_subcarrier = (12 * cfg->ssb_table.ssb_offset_point_a.value + sco);
LOG_I(PHY, "SSB first subcarrier %d (%d,%d)\n", fp->ssb_start_subcarrier,cfg->ssb_table.ssb_offset_point_a.value,sco);
}
void nr_common_signal_procedures (PHY_VARS_gNB *gNB,int frame, int slot) {
NR_DL_FRAME_PARMS *fp=&gNB->frame_parms;
nfapi_nr_config_request_scf_t *cfg = &gNB->gNB_config;
int **txdataF = gNB->common_vars.txdataF;
uint8_t ssb_index, n_hf;
uint16_t ssb_start_symbol, rel_slot;
int txdataF_offset = (slot%2)*fp->samples_per_slot_wCP;
uint16_t slots_per_hf = (fp->slots_per_frame)>>1;
n_hf = fp->half_frame_bit;
// if SSB periodicity is 5ms, they are transmitted in both half frames
if ( cfg->ssb_table.ssb_period.value == 0) {
if (slot<slots_per_hf)
n_hf=0;
else
n_hf=1;
}
// to set a effective slot number in the half frame where the SSB is supposed to be
rel_slot = (n_hf)? (slot-slots_per_hf) : slot;
LOG_D(PHY,"common_signal_procedures: frame %d, slot %d\n",frame,slot);
if(rel_slot<38 && rel_slot>=0) { // there is no SSB beyond slot 37
for (int i=0; i<2; i++) { // max two SSB per frame
ssb_index = i + SSB_Table[rel_slot]; // computing the ssb_index
if ((ssb_index<64) && ((fp->L_ssb >> ssb_index) & 0x01)) { // generating the ssb only if the bit of L_ssb at current ssb index is 1
fp->ssb_index = ssb_index;
int ssb_start_symbol_abs = nr_get_ssb_start_symbol(fp); // computing the starting symbol for current ssb
ssb_start_symbol = ssb_start_symbol_abs % fp->symbols_per_slot; // start symbol wrt slot
nr_set_ssb_first_subcarrier(cfg, fp); // setting the first subcarrier
LOG_D(PHY,"SS TX: frame %d, slot %d, start_symbol %d\n",frame,slot, ssb_start_symbol);
nr_generate_pss(gNB->d_pss, &txdataF[0][txdataF_offset], AMP, ssb_start_symbol, cfg, fp);
nr_generate_sss(gNB->d_sss, &txdataF[0][txdataF_offset], AMP, ssb_start_symbol, cfg, fp);
if (cfg->carrier_config.num_tx_ant.value <= 4)
nr_generate_pbch_dmrs(gNB->nr_gold_pbch_dmrs[n_hf][ssb_index&7],&txdataF[0][txdataF_offset], AMP, ssb_start_symbol, cfg, fp);
else
nr_generate_pbch_dmrs(gNB->nr_gold_pbch_dmrs[0][ssb_index&7],&txdataF[0][txdataF_offset], AMP, ssb_start_symbol, cfg, fp);
nr_generate_pbch(&gNB->pbch,
&gNB->ssb_pdu,
gNB->nr_pbch_interleaver,
&txdataF[0][txdataF_offset],
AMP,
ssb_start_symbol,
n_hf, frame, cfg, fp);
}
}
}
}
void phy_procedures_gNB_TX(PHY_VARS_gNB *gNB,
int frame,int slot,
int do_meas) {
int aa;
NR_DL_FRAME_PARMS *fp=&gNB->frame_parms;
nfapi_nr_config_request_scf_t *cfg = &gNB->gNB_config;
int offset = gNB->CC_id;
uint8_t ssb_frame_periodicity = 1; // every how many frames SSB are generated
int txdataF_offset = (slot%2)*fp->samples_per_slot_wCP;
if (cfg->ssb_table.ssb_period.value > 1)
ssb_frame_periodicity = 1 <<(cfg->ssb_table.ssb_period.value -1) ;
if ((cfg->cell_config.frame_duplex_type.value == TDD) &&
(nr_slot_select(cfg,frame,slot) == NR_UPLINK_SLOT)) return;
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_PROCEDURES_ENB_TX+offset,1);
if (do_meas==1) start_meas(&gNB->phy_proc_tx);
// clear the transmit data array for the current subframe
for (aa=0; aa<cfg->carrier_config.num_tx_ant.value; aa++) {
memset(&gNB->common_vars.txdataF[aa][txdataF_offset],0,fp->samples_per_slot_wCP*sizeof(int32_t));
}
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_ENB_COMMON_TX,1);
if (nfapi_mode == 0 || nfapi_mode == 1) {
if ((!(frame%ssb_frame_periodicity))) // generate SSB only for given frames according to SSB periodicity
nr_common_signal_procedures(gNB,frame, slot);
}
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_ENB_COMMON_TX,0);
if (gNB->pdcch_pdu || gNB->ul_dci_pdu) {
LOG_D(PHY, "[gNB %d] Frame %d slot %d Calling nr_generate_dci_top (number of UL/DL DCI %d/%d)\n",
gNB->Mod_id, frame, slot,
gNB->ul_dci_pdu==NULL?0:gNB->ul_dci_pdu->pdcch_pdu.pdcch_pdu_rel15.numDlDci,
gNB->pdcch_pdu==NULL?0:gNB->pdcch_pdu->pdcch_pdu_rel15.numDlDci);
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_ENB_PDCCH_TX,1);
nr_generate_dci_top(gNB->pdcch_pdu,
gNB->ul_dci_pdu,
gNB->nr_gold_pdcch_dmrs[slot],
&gNB->common_vars.txdataF[0][txdataF_offset],
AMP, *fp);
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_ENB_PDCCH_TX,0);
}
LOG_D(PHY, "PDSCH generation started (%d)\n", gNB->num_pdsch_rnti);
for (int i=0; i<gNB->num_pdsch_rnti; i++) {
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_GENERATE_DLSCH,1);
nr_generate_pdsch(gNB->dlsch[i][0],
gNB->nr_gold_pdsch_dmrs[slot],
gNB->common_vars.txdataF,
AMP, frame, slot, fp, 0,
&gNB->dlsch_encoding_stats,
&gNB->dlsch_scrambling_stats,
&gNB->dlsch_modulation_stats,
&gNB->tinput,
&gNB->tprep,
&gNB->tparity,
&gNB->toutput,
&gNB->dlsch_rate_matching_stats,
&gNB->dlsch_interleaving_stats,
&gNB->dlsch_segmentation_stats);
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_GENERATE_DLSCH,0);
}
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_PROCEDURES_ENB_TX+offset,0);
}
/*
if ((cfg->subframe_config.duplex_mode.value == TDD) &&
((nr_slot_select(fp,frame,slot)&NR_DOWNLINK_SLOT)==SF_DL)) return;
// VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_PROCEDURES_ENB_RX,1);
if (do_prach_rx(fp,frame,slot)) L1_nr_prach_procedures(gNB,frame,slot/fp->slots_per_subframe);
*/
void nr_ulsch_procedures(PHY_VARS_gNB *gNB, int frame_rx, int slot_rx, int ULSCH_id, uint8_t harq_pid)
{
NR_DL_FRAME_PARMS *frame_parms = &gNB->frame_parms;
nfapi_nr_ul_config_ulsch_pdu *rel15_ul = &gNB->ulsch[ULSCH_id][0]->harq_processes[harq_pid]->ulsch_pdu;
nfapi_nr_ul_config_ulsch_pdu_rel15_t *nfapi_ulsch_pdu_rel15 = &rel15_ul->ulsch_pdu_rel15;
uint8_t ret;
uint8_t l, number_dmrs_symbols = 0;
uint8_t mapping_type;
uint32_t G;
int Nid_cell = 0; // [hna] shouldn't be a local variable (should be signaled)
uint16_t start_symbol, number_symbols, nb_re_dmrs;
mapping_type = gNB->pusch_config.pusch_TimeDomainResourceAllocation[0]->mappingType;
start_symbol = nfapi_ulsch_pdu_rel15->start_symbol;
number_symbols = nfapi_ulsch_pdu_rel15->number_symbols;
for (l = start_symbol; l < start_symbol + number_symbols; l++)
number_dmrs_symbols += is_dmrs_symbol(l,
0,
0,
0,
0,
0,
number_symbols,
&gNB->dmrs_UplinkConfig,
mapping_type,
frame_parms->ofdm_symbol_size);
nb_re_dmrs = ((gNB->dmrs_UplinkConfig.pusch_dmrs_type == pusch_dmrs_type1)?6:4)*number_dmrs_symbols;
G = nr_get_G(nfapi_ulsch_pdu_rel15->number_rbs,
number_symbols,
nb_re_dmrs,
nfapi_ulsch_pdu_rel15->length_dmrs,
nfapi_ulsch_pdu_rel15->Qm,
nfapi_ulsch_pdu_rel15->n_layers);
//----------------------------------------------------------
//------------------- ULSCH unscrambling -------------------
//----------------------------------------------------------
nr_ulsch_unscrambling(gNB->pusch_vars[ULSCH_id]->llr,
G,
0,
Nid_cell,
rel15_ul->rnti);
//----------------------------------------------------------
//--------------------- ULSCH decoding ---------------------
//----------------------------------------------------------
ret = nr_ulsch_decoding(gNB,
ULSCH_id,
gNB->pusch_vars[ULSCH_id]->llr,
frame_parms,
frame_rx,
number_symbols,
nb_re_dmrs,
slot_rx,
harq_pid,
0);
if (ret > gNB->ulsch[ULSCH_id][0]->max_ldpc_iterations)
LOG_I(PHY, "ULSCH %d in error\n",ULSCH_id);
else
LOG_I(PHY, "ULSCH %d received ok\n",ULSCH_id);
}
void nr_fill_rx_indication(PHY_VARS_gNB *gNB, int frame, int slot_rx, int ULSCH_id, uint8_t harq_pid)
{
// --------------------
// [hna] TO BE CLEANED
// --------------------
nfapi_rx_indication_pdu_t *pdu;
int timing_advance_update;
int sync_pos;
uint16_t mu = gNB->frame_parms.numerology_index;
// pthread_mutex_lock(&gNB->UL_INFO_mutex);
// gNB->UL_INFO.rx_ind.sfn_sf = frame<<4| slot_rx;
// gNB->UL_INFO.rx_ind.rx_indication_body.tl.tag = NFAPI_RX_INDICATION_BODY_TAG;
pdu = &gNB->UL_INFO.rx_ind.rx_indication_body.rx_pdu_list[gNB->UL_INFO.rx_ind.rx_indication_body.number_of_pdus];
// pdu->rx_ue_information.handle = gNB->ulsch[UE_id+1][0]->handle;
// pdu->rx_ue_information.tl.tag = NFAPI_RX_UE_INFORMATION_TAG;
// pdu->rx_ue_information.rnti = gNB->ulsch[UE_id+1][0]->rnti;
// pdu->rx_indication_rel8.tl.tag = NFAPI_RX_INDICATION_REL8_TAG;
// pdu->rx_indication_rel8.length = gNB->ulsch[UE_id+1][0]->harq_processes[harq_pid]->TBS>>3;
// pdu->rx_indication_rel8.offset = 1; // DJP - I dont understand - but broken unless 1 ???? 0; // filled in at the end of the UL_INFO formation
pdu->data = gNB->ulsch[ULSCH_id+1][0]->harq_processes[harq_pid]->b;
sync_pos = nr_est_timing_advance_pusch(gNB, ULSCH_id); // estimate timing advance for MAC
timing_advance_update = sync_pos * (1 << mu); // scale by the used scs numerology
// scale the 16 factor in N_TA calculation in 38.213 section 4.2 according to the used FFT size
switch (gNB->frame_parms.N_RB_DL) {
case 106: timing_advance_update /= 16; break;
case 217: timing_advance_update /= 32; break;
case 245: timing_advance_update /= 32; break;
case 273: timing_advance_update /= 32; break;
case 66: timing_advance_update /= 12; break;
default: abort();
}
// put timing advance command in 0..63 range
timing_advance_update += 31;
if (timing_advance_update < 0) timing_advance_update = 0;
if (timing_advance_update > 63) timing_advance_update = 63;
LOG_D(PHY, "Estimated timing advance PUSCH is = %d, timing_advance_update is %d \n", sync_pos,timing_advance_update);
pdu->rx_indication_rel8.timing_advance = timing_advance_update;
// estimate UL_CQI for MAC (from antenna port 0 only)
// int SNRtimes10 = dB_fixed_times10(gNB->pusch_vars[UE_id]->ulsch_power[0]) - 300;//(10*gNB->measurements.n0_power_dB[0]);
// if (SNRtimes10 < -640) pdu->rx_indication_rel8.ul_cqi=0;
// else if (SNRtimes10 > 635) pdu->rx_indication_rel8.ul_cqi=255;
// else pdu->rx_indication_rel8.ul_cqi=(640+SNRtimes10)/5;
// LOG_D(PHY,"[PUSCH %d] Frame %d Subframe %d Filling RX_indication with SNR %d (%d), timing_advance %d (update %d)\n",
// harq_pid,frame,slot_rx,SNRtimes10,pdu->rx_indication_rel8.ul_cqi,pdu->rx_indication_rel8.timing_advance,
// timing_advance_update);
gNB->UL_INFO.rx_ind.rx_indication_body.number_of_pdus++;
// gNB->UL_INFO.rx_ind.sfn_sf = frame<<4 | slot_rx;
// pthread_mutex_unlock(&gNB->UL_INFO_mutex);
}
void nr_fill_crc_indication (PHY_VARS_gNB *gNB, int frame, int slot_rx, int UE_id, uint8_t crc_flag){
// pthread_mutex_lock(&gNB->UL_INFO_mutex);
// nfapi_crc_indication_pdu_t *pdu = &gNB->UL_INFO.crc_ind.crc_indication_body.crc_pdu_list[gNB->UL_INFO.crc_ind.crc_indication_body.number_of_crcs];
// gNB->UL_INFO.crc_ind.sfn_sf = frame<<4 | subframe;
// gNB->UL_INFO.crc_ind.header.message_id = NFAPI_CRC_INDICATION;
// gNB->UL_INFO.crc_ind.crc_indication_body.tl.tag = NFAPI_CRC_INDICATION_BODY_TAG;
// pdu->instance_length = 0; // don't know what to do with this
// // pdu->rx_ue_information.handle = handle;
// pdu->rx_ue_information.tl.tag = NFAPI_RX_UE_INFORMATION_TAG;
// pdu->rx_ue_information.rnti = gNB->ulsch[UE_id]->rnti;
// pdu->crc_indication_rel8.tl.tag = NFAPI_CRC_INDICATION_REL8_TAG;
// pdu->crc_indication_rel8.crc_flag = crc_flag;
gNB->UL_INFO.crc_ind.crc_indication_body.number_of_crcs++;
//LOG_D(PHY, "%s() rnti:%04x crcs:%d crc_flag:%d\n", __FUNCTION__, pdu->rx_ue_information.rnti, gNB->UL_INFO.crc_ind.crc_indication_body.number_of_crcs, crc_flag);
// pthread_mutex_unlock(&gNB->UL_INFO_mutex);
}
void phy_procedures_gNB_common_RX(PHY_VARS_gNB *gNB, int frame_rx, int slot_rx) {
uint8_t symbol;
unsigned char aa;
for(symbol = 0; symbol < NR_SYMBOLS_PER_SLOT; symbol++) {
// nr_slot_fep_ul(gNB, symbol, proc->slot_rx, 0, 0);
for (aa = 0; aa < gNB->frame_parms.nb_antennas_rx; aa++) {
nr_slot_fep_ul(&gNB->frame_parms,
gNB->common_vars.rxdata[aa],
gNB->common_vars.rxdataF[aa],
symbol,
slot_rx,
0,
0);
}
}
}
void phy_procedures_gNB_uespec_RX(PHY_VARS_gNB *gNB, int frame_rx, int slot_rx) {
nfapi_nr_ul_tti_request_t *UL_tti_req = &gNB->UL_tti_req;
int num_pusch_pdu = UL_tti_req->n_pdus;
LOG_D(PHY,"phy_procedures_gNB_uespec_RX frame %d, slot %d, num_pusch_pdu %d\n",frame_rx,slot_rx,num_pusch_pdu);
gNB->UL_INFO.rx_ind.rx_indication_body.number_of_pdus = 0;
for (int i = 0; i < num_pusch_pdu; i++) {
switch (UL_tti_req->pdus_list[i].pdu_type) {
case NFAPI_NR_UL_CONFIG_PUSCH_PDU_TYPE:{
LOG_D(PHY,"frame %d, slot %d, Got NFAPI_NR_UL_CONFIG_PUSCH_PDU_TYPE\n",frame_rx,slot_rx);
nfapi_nr_pusch_pdu_t *pusch_pdu = &UL_tti_req->pdus_list[0].pusch_pdu;
nr_fill_ulsch(gNB,frame_rx,slot_rx,pusch_pdu);
uint8_t ULSCH_id = find_nr_ulsch(pusch_pdu->rnti,gNB,SEARCH_EXIST);
uint8_t harq_pid = pusch_pdu->pusch_data.harq_process_id;
uint8_t symbol_start = pusch_pdu->start_symbol_index;
uint8_t symbol_end = symbol_start + pusch_pdu->nr_of_symbols;
for(uint8_t symbol = symbol_start; symbol < symbol_end; symbol++) {
nr_rx_pusch(gNB, ULSCH_id, frame_rx, slot_rx, symbol, harq_pid);
}
//LOG_M("rxdataF_comp.m","rxF_comp",gNB->pusch_vars[0]->rxdataF_comp[0],6900,1,1);
//LOG_M("rxdataF_ext.m","rxF_ext",gNB->pusch_vars[0]->rxdataF_ext[0],6900,1,1);
nr_ulsch_procedures(gNB, frame_rx, slot_rx, ULSCH_id, harq_pid);
nr_fill_rx_indication(gNB, frame_rx, slot_rx, ULSCH_id, harq_pid); // indicate SDU to MAC
nr_fill_crc_indication(gNB, frame_rx, slot_rx, ULSCH_id, 0);
}
}
}
}
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