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176d8730837085bdcb68f1fa46de4f0c7488f61a
openairinterface5g/openair1/SCHED_NR/phy_procedures_nr_gNB.c
T
Ahmed Hussein 176d873083 Shifting the QAM threshold by AMP, instead of shifting the data by AMP_SHIFT 
This fixes the errors in bits introduced after LDPC decoding in case of mod_order = 6 and AMO_SHIFT = 9
2019-06-04 13:43:19 +02:00

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9.3 KiB
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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_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 "SCHED/sched_eNB.h"
#include "SCHED/sched_common_extern.h"
#include "nfapi_interface.h"
#include "SCHED/fapi_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
extern uint8_t nfapi_mode;
/*
int return_ssb_type(nfapi_config_request_t *cfg)
{
int mu = cfg->subframe_config.numerology_index_mu.value;
nr_ssb_type_e ssb_type;
switch(mu) {
case NR_MU_0:
ssb_type = nr_ssb_type_A;
break;
case NR_MU_1:
ssb_type = nr_ssb_type_B;
break;
case NR_MU_3:
ssb_type = nr_ssb_type_D;
break;
case NR_MU_4:
ssb_type = nr_ssb_type_E;
break;
default:
AssertFatal(0==1, "Invalid numerology index %d for the synchronization block\n", mu);
}
LOG_D(PHY, "SSB type %d\n", ssb_type);
return ssb_type;
}*/
void nr_set_ssb_first_subcarrier(nfapi_nr_config_request_t *cfg, NR_DL_FRAME_PARMS *fp) {
fp->ssb_start_subcarrier = (12 * cfg->sch_config.n_ssb_crb.value + cfg->sch_config.ssb_subcarrier_offset.value)/(1<<cfg->subframe_config.numerology_index_mu.value);
LOG_D(PHY, "SSB first subcarrier %d (%d,%d)\n", fp->ssb_start_subcarrier,cfg->sch_config.n_ssb_crb.value,cfg->sch_config.ssb_subcarrier_offset.value);
}
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_t *cfg = &gNB->gNB_config;
int **txdataF = gNB->common_vars.txdataF;
uint8_t *pbch_pdu=&gNB->pbch_pdu[0];
uint8_t ssb_index, n_hf;
int ssb_start_symbol, rel_slot;
n_hf = cfg->sch_config.half_frame_index.value;
// if SSB periodicity is 5ms, they are transmitted in both half frames
if ( cfg->sch_config.ssb_periodicity.value == 5) {
if (slot<10)
n_hf=0;
else
n_hf=1;
}
// to set a effective slot number between 0 to 9 in the half frame where the SSB is supposed to be
rel_slot = (n_hf)? (slot-10) : slot;
LOG_D(PHY,"common_signal_procedures: frame %d, slot %d\n",frame,slot);
if(rel_slot<10 && rel_slot>=0) {
for (int i=0; i<2; i++) { // max two SSB per frame
ssb_index = i + 2*rel_slot; // computing the ssb_index
if ((fp->L_ssb >> ssb_index) & 0x01) { // generating the ssb only if the bit of L_ssb at current ssb index is 1
int ssb_start_symbol_abs = nr_get_ssb_start_symbol(fp, ssb_index, n_hf); // computing the starting symbol for current ssb
ssb_start_symbol = ssb_start_symbol_abs % 14; // 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], AMP, ssb_start_symbol, cfg, fp);
nr_generate_sss(gNB->d_sss, txdataF[0], AMP, ssb_start_symbol, cfg, fp);
if (fp->Lmax == 4)
nr_generate_pbch_dmrs(gNB->nr_gold_pbch_dmrs[n_hf][ssb_index],txdataF[0], AMP, ssb_start_symbol, cfg, fp);
else
nr_generate_pbch_dmrs(gNB->nr_gold_pbch_dmrs[0][ssb_index],txdataF[0], AMP, ssb_start_symbol, cfg, fp);
nr_generate_pbch(&gNB->pbch,
pbch_pdu,
gNB->nr_pbch_interleaver,
txdataF[0],
AMP,
ssb_start_symbol,
n_hf,fp->Lmax,ssb_index,
frame, cfg, fp);
}
}
}
}
void phy_procedures_gNB_TX(PHY_VARS_gNB *gNB,
int frame,int slot,
int do_meas) {
int aa;
uint8_t num_dci=0,num_pdsch_rnti;
NR_DL_FRAME_PARMS *fp=&gNB->frame_parms;
nfapi_nr_config_request_t *cfg = &gNB->gNB_config;
int offset = gNB->CC_id;
uint8_t ssb_frame_periodicity; // every how many frames SSB are generated
if (cfg->sch_config.ssb_periodicity.value < 20)
ssb_frame_periodicity = 1;
else
ssb_frame_periodicity = (cfg->sch_config.ssb_periodicity.value)/10 ; // 10ms is the frame length
if ((cfg->subframe_config.duplex_mode.value == TDD) && (nr_slot_select(cfg,slot)==SF_UL)) 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<1/*15*/; aa++) {
memset(gNB->common_vars.txdataF[aa],0,fp->samples_per_slot_wCP*sizeof(int32_t));
}
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);
}
num_dci = gNB->pdcch_vars.num_dci;
num_pdsch_rnti = gNB->pdcch_vars.num_pdsch_rnti;
if (num_dci) {
LOG_D(PHY, "[gNB %d] Frame %d slot %d \
Calling nr_generate_dci_top (number of DCI %d)\n", gNB->Mod_id, frame, slot, num_dci);
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_ENB_PDCCH_TX,1);
if (nfapi_mode == 0 || nfapi_mode == 1) {
nr_generate_dci_top(gNB->pdcch_vars,
gNB->nr_gold_pdcch_dmrs[slot],
gNB->common_vars.txdataF[0],
AMP, *fp, *cfg);
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_ENB_PDCCH_TX,0);
if (num_pdsch_rnti) {
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_GENERATE_DLSCH,1);
LOG_D(PHY, "PDSCH generation started (%d)\n", num_pdsch_rnti);
nr_generate_pdsch(gNB->dlsch[0][0],
&gNB->pdcch_vars.dci_alloc[0],
gNB->nr_gold_pdsch_dmrs[slot],
gNB->common_vars.txdataF,
AMP, frame, slot, fp, cfg);
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);
}
void nr_ulsch_procedures(PHY_VARS_gNB *gNB, gNB_L1_rxtx_proc_t *proc, int UE_id, uint8_t harq_pid) {
NR_DL_FRAME_PARMS *frame_parms = &gNB->frame_parms;
nfapi_nr_ul_config_ulsch_pdu *rel15_ul = &gNB->ulsch[UE_id+1][0]->harq_processes[harq_pid]->ulsch_pdu;
uint8_t ret;
int Nid_cell = 0; // shouldn't be a local variable
//----------------------------------------------------------
//------------------- ULSCH unscrambling -------------------
//----------------------------------------------------------
nr_ulsch_unscrambling(gNB->pusch_vars[UE_id]->llr, gNB->ulsch[UE_id+1][0]->harq_processes[harq_pid]->G, 0, Nid_cell, rel15_ul->rnti);
//----------------------------------------------------------
//--------------------- ULSCH decoding ---------------------
//----------------------------------------------------------
ret = nr_ulsch_decoding(gNB, UE_id, gNB->pusch_vars[UE_id]->llr, frame_parms, proc->frame_rx,
rel15_ul->ulsch_pdu_rel15.number_symbols, proc->slot_rx, harq_pid, 0);
// if (ret > ulsch_gNB->max_ldpc_iterations)
// n_errors++;
}
void phy_procedures_gNB_common_RX(PHY_VARS_gNB *gNB, gNB_L1_rxtx_proc_t *proc) {
uint8_t symbol;
for(symbol = 0; symbol < NR_SYMBOLS_PER_SLOT; symbol++) {
nr_slot_fep_ul(gNB, symbol, proc->slot_rx, 0, 0);
}
}
void phy_procedures_gNB_uespec_RX(PHY_VARS_gNB *gNB, gNB_L1_rxtx_proc_t *proc, uint8_t symbol_start, uint8_t symbol_end) {
uint8_t UE_id;
uint8_t symbol;
uint8_t harq_pid = 0; // [hna] Previously in LTE, the harq_pid was obtained from the subframe number (Synchronous HARQ)
// In NR, this should be signaled through uplink scheduling dci (i.e, DCI 0_0, 0_1) (Asynchronous HARQ)
for (UE_id = 0; UE_id < NUMBER_OF_NR_UE_MAX; UE_id++) {
for(symbol = symbol_start; symbol < symbol_end; symbol++) {
nr_rx_pusch(gNB, UE_id, proc->frame_rx, proc->slot_rx, symbol, harq_pid);
}
nr_ulsch_procedures(gNB, proc, UE_id, harq_pid);
}
}
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