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openairinterface5g/openair1/SIMULATION/NR_PHY/ulschsim.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 <string.h>
#include <math.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include "common/config/config_userapi.h"
#include "common/utils/load_module_shlib.h"
#include "common/utils/LOG/log.h"
#include "common/ran_context.h"
#include "PHY/types.h"
#include "PHY/defs_nr_common.h"
#include "PHY/defs_nr_UE.h"
#include "PHY/defs_gNB.h"
#include "PHY/INIT/phy_init.h"
#include "PHY/NR_REFSIG/refsig_defs_ue.h"
#include "PHY/MODULATION/modulation_eNB.h"
#include "PHY/MODULATION/modulation_UE.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_UE_TRANSPORT/nr_transport_proto_ue.h"
#include "SCHED_NR/sched_nr.h"
#include "openair1/SIMULATION/TOOLS/sim.h"
#include "openair1/SIMULATION/RF/rf.h"
#include "openair1/SIMULATION/NR_PHY/nr_unitary_defs.h"
#include "openair1/SIMULATION/NR_PHY/nr_dummy_functions.c"
#include "common/utils/threadPool/thread-pool.h"
#include "openair2/LAYER2/NR_MAC_COMMON/nr_mac_common.h"
//#define DEBUG_NR_ULSCHSIM
THREAD_STRUCT thread_struct;
PHY_VARS_gNB *gNB;
PHY_VARS_NR_UE *UE;
RAN_CONTEXT_t RC;
int32_t uplink_frequency_offset[MAX_NUM_CCs][4];
uint64_t downlink_frequency[MAX_NUM_CCs][4];
void init_downlink_harq_status(NR_DL_UE_HARQ_t *dl_harq) {}
uint8_t const nr_rv_round_map[4] = {0, 2, 3, 1};
double cpuf;
//uint8_t nfapi_mode = 0;
uint16_t NB_UE_INST = 1;
// needed for some functions
PHY_VARS_NR_UE *PHY_vars_UE_g[1][1] = { { NULL } };
uint16_t n_rnti = 0x1234;
openair0_config_t openair0_cfg[MAX_CARDS];
int nr_postDecode_sim(PHY_VARS_gNB *gNB, notifiedFIFO_elt_t *req) {
ldpcDecode_t *rdata = (ldpcDecode_t*) NotifiedFifoData(req);
NR_UL_gNB_HARQ_t *ulsch_harq = rdata->ulsch_harq;
NR_gNB_ULSCH_t *ulsch = rdata->ulsch;
int r = rdata->segment_r;
bool decodeSuccess = (rdata->decodeIterations <= rdata->decoderParms.numMaxIter);
ulsch_harq->processedSegments++;
gNB->nbDecode--;
if (decodeSuccess) {
memcpy(ulsch_harq->b+rdata->offset,
ulsch_harq->c[r],
rdata->Kr_bytes - (ulsch_harq->F>>3) -((ulsch_harq->C>1)?3:0));
} else {
if ( rdata->nbSegments != ulsch_harq->processedSegments ) {
int nb=abortTpoolJob(&gNB->threadPool, req->key);
nb+=abortNotifiedFIFOJob(&gNB->respDecode, req->key);
gNB->nbDecode-=nb;
AssertFatal(ulsch_harq->processedSegments+nb == rdata->nbSegments,"processed: %d, aborted: %d, total %d\n",
ulsch_harq->processedSegments, nb, rdata->nbSegments);
ulsch_harq->processedSegments=rdata->nbSegments;
return 1;
}
}
// if all segments are done
if (rdata->nbSegments == ulsch_harq->processedSegments) {
if (decodeSuccess) {
return 0;
} else {
return 1;
}
}
ulsch->last_iteration_cnt = rdata->decodeIterations;
return 0;
}
int main(int argc, char **argv)
{
char c;
int i,sf;
double SNR, snr0 = -2.0, snr1 = 2.0, SNR_lin;
double snr_step = 0.1;
uint8_t snr1set = 0;
FILE *output_fd = NULL;
//uint8_t write_output_file = 0;
int trial, n_trials = 1, n_errors = 0, n_false_positive = 0;
uint8_t n_tx = 1, n_rx = 1, nb_codewords = 1;
//uint8_t transmission_mode = 1;
uint16_t Nid_cell = 0;
channel_desc_t *gNB2UE;
uint8_t extended_prefix_flag = 0;
//int8_t interf1 = -21, interf2 = -21;
FILE *input_fd = NULL;
SCM_t channel_model = AWGN; //Rayleigh1_anticorr;
uint16_t N_RB_DL = 106, N_RB_UL = 106, mu = 1;
//unsigned char frame_type = 0;
//unsigned char pbch_phase = 0;
int frame = 0, subframe = 0;
NR_DL_FRAME_PARMS *frame_parms;
double sigma;
unsigned char qbits = 8;
int ret=0;
int loglvl = OAILOG_WARNING;
uint64_t SSB_positions=0x01;
uint16_t nb_symb_sch = 12;
uint16_t nb_rb = 50;
uint8_t Imcs = 9;
uint8_t Nl = 1;
uint8_t max_ldpc_iterations = 5;
double DS_TDL = .03;
cpuf = get_cpu_freq_GHz();
if (load_configmodule(argc, argv, CONFIG_ENABLECMDLINEONLY) == 0) {
exit_fun("[NR_ULSCHSIM] Error, configuration module init failed\n");
}
//logInit();
randominit(0);
//while ((c = getopt(argc, argv, "df:hpg:i:j:n:l:m:r:s:S:y:z:M:N:F:R:P:")) != -1) {
while ((c = getopt(argc, argv, "hg:n:s:S:py:z:M:N:R:F:m:l:r:W:")) != -1) {
switch (c) {
/*case 'f':
write_output_file = 1;
output_fd = fopen(optarg, "w");
if (output_fd == NULL) {
printf("Error opening %s\n", optarg);
exit(-1);
}
break;*/
/*case 'd':
frame_type = 1;
break;*/
case 'g':
switch ((char) *optarg) {
case 'A':
channel_model = SCM_A;
break;
case 'B':
channel_model = SCM_B;
break;
case 'C':
channel_model = SCM_C;
break;
case 'D':
channel_model = SCM_D;
break;
case 'E':
channel_model = EPA;
break;
case 'F':
channel_model = EVA;
break;
case 'G':
channel_model = ETU;
break;
default:
printf("Unsupported channel model! Exiting.\n");
exit(-1);
}
break;
/*case 'i':
interf1 = atoi(optarg);
break;
case 'j':
interf2 = atoi(optarg);
break;*/
case 'n':
n_trials = atoi(optarg);
#ifdef DEBUG_NR_ULSCHSIM
printf("n_trials (-n) = %d\n", n_trials);
#endif
break;
case 's':
snr0 = atof(optarg);
#ifdef DEBUG_NR_ULSCHSIM
printf("Setting SNR0 to %f\n", snr0);
#endif
break;
case 'S':
snr1 = atof(optarg);
snr1set = 1;
#ifdef DEBUG_NR_ULSCHSIM
printf("Setting SNR1 to %f\n", snr1);
#endif
break;
case 'p':
extended_prefix_flag = 1;
break;
/*
case 'r':
ricean_factor = pow(10,-.1*atof(optarg));
if (ricean_factor>1) {
printf("Ricean factor must be between 0 and 1\n");
exit(-1);
}
break;
*/
case 'y':
n_tx = atoi(optarg);
if ((n_tx == 0) || (n_tx > 4)) {
printf("Unsupported number of TX antennas %d. Exiting.\n", n_tx);
exit(-1);
}
break;
case 'z':
n_rx = atoi(optarg);
if ((n_rx == 0) || (n_rx > 4)) {
printf("Unsupported number of RX antennas %d. Exiting.\n", n_rx);
exit(-1);
}
break;
case 'M':
SSB_positions = atoi(optarg);
break;
case 'N':
Nid_cell = atoi(optarg);
break;
case 'R':
N_RB_UL = atoi(optarg);
#ifdef DEBUG_NR_ULSCHSIM
printf("N_RB_UL (-R) = %d\n", N_RB_UL);
#endif
break;
case 'F':
input_fd = fopen(optarg, "r");
if (input_fd == NULL) {
printf("Problem with filename %s. Exiting.\n", optarg);
exit(-1);
}
break;
/*case 'P':
pbch_phase = atoi(optarg);
if (pbch_phase > 3)
printf("Illegal PBCH phase (0-3) got %d\n", pbch_phase);
break;*/
case 'W':
Nl = atoi(optarg);
break;
case 'm':
Imcs = atoi(optarg);
#ifdef DEBUG_NR_ULSCHSIM
printf("Imcs (-m) = %d\n", Imcs);
#endif
break;
case 'l':
nb_symb_sch = atoi(optarg);
break;
case 'r':
nb_rb = atoi(optarg);
break;
/*case 'x':
transmission_mode = atoi(optarg);
break;*/
default:
case 'h':
printf("%s -h(elp) -g channel_model -n n_frames -s snr0 -S snr1 -p(extended_prefix) -y TXant -z RXant -M -N cell_id -R -F input_filename -m -l -r\n", argv[0]);
//printf("%s -h(elp) -p(extended_prefix) -N cell_id -f output_filename -F input_filename -g channel_model -n n_frames -t Delayspread -s snr0 -S snr1 -x transmission_mode -y TXant -z RXant -i Intefrence0 -j Interference1 -A interpolation_file -C(alibration offset dB) -N CellId\n", argv[0]);
printf("-h This message\n");
printf("-g [A,B,C,D,E,F,G] Use 3GPP SCM (A,B,C,D) or 36-101 (E-EPA,F-EVA,G-ETU) models (ignores delay spread and Ricean factor)\n");
printf("-n Number of frames to simulate\n");
//printf("-d Use TDD\n");
printf("-s Starting SNR, runs from SNR0 to SNR0 + 5 dB. If n_frames is 1 then just SNR is simulated\n");
printf("-S Ending SNR, runs from SNR0 to SNR1\n");
printf("-p Use extended prefix mode\n");
//printf("-t Delay spread for multipath channel\n");
//printf("-x Transmission mode (1,2,6 for the moment)\n");
printf("-y Number of TX antennas used in eNB\n");
printf("-z Number of RX antennas used in UE\n");
//printf("-i Relative strength of first intefering eNB (in dB) - cell_id mod 3 = 1\n");
//printf("-j Relative strength of second intefering eNB (in dB) - cell_id mod 3 = 2\n");
printf("-W number of layer\n");
printf("-M Multiple SSB positions in burst\n");
printf("-N Nid_cell\n");
printf("-R N_RB_UL\n");
printf("-F Input filename (.txt format) for RX conformance testing\n");
printf("-m MCS\n");
printf("-l number of symbol\n");
printf("-r number of RB\n");
//printf("-O oversampling factor (1,2,4,8,16)\n");
//printf("-A Interpolation_filname Run with Abstraction to generate Scatter plot using interpolation polynomial in file\n");
//printf("-C Generate Calibration information for Abstraction (effective SNR adjustment to remove Pe bias w.r.t. AWGN)\n");
//printf("-f Output filename (.txt format) for Pe/SNR results\n");
exit(-1);
break;
}
}
logInit();
set_glog(loglvl);
T_stdout = 1;
if (snr1set == 0)
snr1 = snr0 + 10;
gNB2UE = new_channel_desc_scm(n_tx,
n_rx,
channel_model,
61.44e6, //N_RB2sampling_rate(N_RB_DL),
40e6, //N_RB2channel_bandwidth(N_RB_DL),
DS_TDL,
0,0,0, 0);
if (gNB2UE == NULL) {
printf("Problem generating channel model. Exiting.\n");
exit(-1);
}
RC.gNB = (PHY_VARS_gNB **) malloc(sizeof(PHY_VARS_gNB *));
RC.gNB[0] = calloc(1, sizeof(PHY_VARS_gNB));
gNB = RC.gNB[0];
//gNB_config = &gNB->gNB_config;
char tp_param[] = "n";
initTpool(tp_param, &gNB->threadPool, true);
initNotifiedFIFO(&gNB->respDecode);
frame_parms = &gNB->frame_parms; //to be initialized I suppose (maybe not necessary for PBCH)
frame_parms->N_RB_DL = N_RB_DL;
frame_parms->N_RB_UL = N_RB_UL;
frame_parms->Ncp = extended_prefix_flag ? EXTENDED : NORMAL;
gNB->max_ldpc_iterations = max_ldpc_iterations;
crcTableInit();
memcpy(&gNB->frame_parms, frame_parms, sizeof(NR_DL_FRAME_PARMS));
gNB->frame_parms.nb_antennas_tx = 1;
gNB->frame_parms.nb_antennas_rx = n_rx;
nr_phy_config_request_sim(gNB, N_RB_UL, N_RB_UL, mu, Nid_cell, SSB_positions);
phy_init_nr_gNB(gNB, 0, 1); //lowmem
//configure UE
UE = malloc(sizeof(PHY_VARS_NR_UE));
memcpy(&UE->frame_parms, frame_parms, sizeof(NR_DL_FRAME_PARMS));
UE->frame_parms.nb_antennas_tx = n_tx;
UE->frame_parms.nb_antennas_rx = 1;
//phy_init_nr_top(frame_parms);
if (init_nr_ue_signal(UE, 1) != 0) {
printf("Error at UE NR initialisation.\n");
exit(-1);
}
for (sf = 0; sf < 2; sf++) {
UE->ulsch[sf][0] = new_nr_ue_ulsch(N_RB_UL, 8, frame_parms);
if (!UE->ulsch[sf][0]) {
printf("Can't get ue ulsch structures.\n");
exit(-1);
}
}
unsigned char harq_pid = 0;
unsigned int TBS = 8424;
unsigned int available_bits;
uint8_t nb_re_dmrs = 6;
uint8_t length_dmrs = 1;
uint8_t N_PRB_oh;
uint16_t N_RE_prime,code_rate;
unsigned char mod_order;
uint8_t rvidx = 0;
uint8_t UE_id = 0;
NR_gNB_ULSCH_t *ulsch_gNB = gNB->ulsch[UE_id];
NR_UL_gNB_HARQ_t *harq_process_gNB = ulsch_gNB->harq_processes[harq_pid];
nfapi_nr_pusch_pdu_t *rel15_ul = &harq_process_gNB->ulsch_pdu;
NR_UE_ULSCH_t *ulsch_ue = UE->ulsch[0][0];
if ((Nl==4)||(Nl==3))
nb_re_dmrs = nb_re_dmrs*2;
mod_order = nr_get_Qm_ul(Imcs, 0);
code_rate = nr_get_code_rate_ul(Imcs, 0);
available_bits = nr_get_G(nb_rb, nb_symb_sch, nb_re_dmrs, length_dmrs, mod_order, Nl);
TBS = nr_compute_tbs(mod_order,code_rate, nb_rb, nb_symb_sch, nb_re_dmrs*length_dmrs, 0, 0, Nl);
printf("\nAvailable bits %u TBS %u mod_order %d\n", available_bits, TBS, mod_order);
/////////// setting rel15_ul parameters ///////////
rel15_ul->rb_size = nb_rb;
rel15_ul->nr_of_symbols = nb_symb_sch;
rel15_ul->qam_mod_order = mod_order;
rel15_ul->mcs_index = Imcs;
rel15_ul->pusch_data.rv_index = rvidx;
rel15_ul->nrOfLayers = Nl;
rel15_ul->target_code_rate = code_rate;
rel15_ul->pusch_data.tb_size = TBS>>3;
///////////////////////////////////////////////////
double modulated_input[16 * 68 * 384]; // [hna] 16 segments, 68*Zc
short channel_output_fixed[16 * 68 * 384];
short channel_output_uncoded[16 * 68 * 384];
unsigned int errors_bit_uncoded = 0;
unsigned int errors_bit = 0;
unsigned char test_input_bit[16 * 68 * 384];
unsigned char estimated_output_bit[16 * 68 * 384];
/////////////////////////[adk] preparing UL harq_process parameters/////////////////////////
///////////
NR_UL_UE_HARQ_t *harq_process_ul_ue = ulsch_ue->harq_processes[harq_pid];
DevAssert(harq_process_ul_ue);
N_PRB_oh = 0; // higher layer (RRC) parameter xOverhead in PUSCH-ServingCellConfig
N_RE_prime = NR_NB_SC_PER_RB*nb_symb_sch - nb_re_dmrs - N_PRB_oh;
harq_process_ul_ue->pusch_pdu.rnti = n_rnti;
harq_process_ul_ue->pusch_pdu.mcs_index = Imcs;
harq_process_ul_ue->pusch_pdu.nrOfLayers = Nl;
harq_process_ul_ue->pusch_pdu.rb_size = nb_rb;
harq_process_ul_ue->pusch_pdu.nr_of_symbols = nb_symb_sch;
harq_process_ul_ue->num_of_mod_symbols = N_RE_prime*nb_rb*nb_codewords;
harq_process_ul_ue->pusch_pdu.pusch_data.rv_index = rvidx;
harq_process_ul_ue->pusch_pdu.pusch_data.tb_size = TBS>>3;
harq_process_ul_ue->pusch_pdu.target_code_rate = code_rate;
harq_process_ul_ue->pusch_pdu.qam_mod_order = mod_order;
unsigned char *test_input = harq_process_ul_ue->a;
///////////
////////////////////////////////////////////////////////////////////////////////////////////
for (i = 0; i < TBS / 8; i++)
test_input[i] = (unsigned char) rand();
#ifdef DEBUG_NR_ULSCHSIM
for (i = 0; i < TBS / 8; i++) printf("test_input[i]=%hhu \n",test_input[i]);
#endif
/////////////////////////ULSCH coding/////////////////////////
///////////
unsigned int G = nr_get_G(nb_rb, nb_symb_sch, nb_re_dmrs, length_dmrs, mod_order, Nl);
if (input_fd == NULL) {
nr_ulsch_encoding(UE, ulsch_ue, frame_parms, harq_pid, G);
}
printf("\n");
///////////
////////////////////////////////////////////////////////////////////
for (SNR = snr0; SNR < snr1; SNR += snr_step) {
n_errors = 0;
n_false_positive = 0;
for (trial = 0; trial < n_trials; trial++) {
errors_bit_uncoded = 0;
for (i = 0; i < available_bits; i++) {
#ifdef DEBUG_CODER
if ((i&0xf)==0)
printf("\ne %d..%d: ",i,i+15);
#endif
/*
if (i<16){
printf("ulsch_encoder output f[%d] = %d\n",i,ulsch_ue->harq_processes[0]->f[i]);
}
*/
if (ulsch_ue->harq_processes[harq_pid]->f[i] == 0)
modulated_input[i] = 1.0; ///sqrt(2); //QPSK
else
modulated_input[i] = -1.0; ///sqrt(2);
//if (i<16) printf("modulated_input[%d] = %d\n",i,modulated_input[i]);
#if 1
SNR_lin = pow(10, SNR / 10.0);
sigma = 1.0 / sqrt(2 * SNR_lin);
channel_output_fixed[i] = (short) quantize(sigma / 4.0 / 4.0,
modulated_input[i] + sigma * gaussdouble(0.0, 1.0),
qbits);
#else
channel_output_fixed[i] = (short) quantize(0.01, modulated_input[i], qbits);
#endif
//printf("channel_output_fixed[%d]: %d\n",i,channel_output_fixed[i]);
//Uncoded BER
if (channel_output_fixed[i] < 0)
channel_output_uncoded[i] = 1; //QPSK demod
else
channel_output_uncoded[i] = 0;
if (channel_output_uncoded[i] != ulsch_ue->harq_processes[harq_pid]->f[i])
errors_bit_uncoded = errors_bit_uncoded + 1;
}
/*
printf("errors bits uncoded %u\n", errors_bit_uncoded);
printf("\n");
*/
#ifdef DEBUG_CODER
printf("\n");
exit(-1);
#endif
uint32_t G = nr_get_G(rel15_ul->rb_size,
rel15_ul->nr_of_symbols,
nb_re_dmrs,
1, // FIXME only single dmrs is implemented
rel15_ul->qam_mod_order,
rel15_ul->nrOfLayers);
nr_ulsch_decoding(gNB, UE_id, channel_output_fixed, frame_parms, rel15_ul,
frame, subframe, harq_pid, G);
while (gNB->nbDecode > 0) {
notifiedFIFO_elt_t *req=pullTpool(&gNB->respDecode, &gNB->threadPool);
ret = nr_postDecode_sim(gNB, req);
delNotifiedFIFO_elt(req);
}
if (ret)
n_errors++;
//count errors
errors_bit = 0;
for (i = 0; i < TBS; i++) {
estimated_output_bit[i] = (ulsch_gNB->harq_processes[harq_pid]->b[i/8] & (1 << (i & 7))) >> (i & 7);
test_input_bit[i] = (test_input[i / 8] & (1 << (i & 7))) >> (i & 7); // Further correct for multiple segments
if (estimated_output_bit[i] != test_input_bit[i]) {
errors_bit++;
}
}
/*
if (errors_bit > 0) {
n_false_positive++;
if (n_trials == 1)
printf("errors_bit %u (trial %d)\n", errors_bit, trial);
}
printf("\n");*/
}
printf("*****************************************\n");
printf("SNR %f, BLER %f (false positive %f)\n", SNR,
(float) n_errors / (float) n_trials,
(float) n_false_positive / (float) n_trials);
printf("*****************************************\n");
printf("\n");
if (n_errors == 0) {
printf("PUSCH test OK\n");
printf("\n");
break;
}
printf("\n");
}
for (sf = 0; sf < 2; sf++)
free_nr_ue_ulsch(&UE->ulsch[sf][0], N_RB_UL, frame_parms);
term_nr_ue_signal(UE, 1);
free(UE);
phy_free_nr_gNB(gNB);
free(RC.gNB[0]);
free(RC.gNB);
free_channel_desc_scm(gNB2UE);
if (output_fd)
fclose(output_fd);
if (input_fd)
fclose(input_fd);
loader_reset();
logTerm();
return (n_errors);
}
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