/*
* 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/ran_context.h"
#include "common/config/config_userapi.h"
#include "common/utils/LOG/log.h"
#include "PHY/defs_gNB.h"
#include "PHY/defs_nr_common.h"
#include "PHY/defs_nr_UE.h"
#include "PHY/phy_vars_nr_ue.h"
#include "PHY/types.h"
#include "PHY/INIT/phy_init.h"
#include "PHY/MODULATION/modulation_UE.h"
#include "PHY/MODULATION/nr_modulation.h"
#include "PHY/NR_REFSIG/dmrs_nr.h"
#include "PHY/NR_REFSIG/nr_mod_table.h"
#include "PHY/NR_REFSIG/refsig_defs_ue.h"
#include "PHY/NR_TRANSPORT/nr_dlsch.h"
#include "PHY/NR_TRANSPORT/nr_sch_dmrs.h"
#include "PHY/NR_TRANSPORT/nr_transport.h"
#include "PHY/NR_TRANSPORT/nr_transport_proto.h"
#include "PHY/NR_TRANSPORT/nr_ulsch.h"
#include "PHY/NR_UE_TRANSPORT/nr_transport_proto_ue.h"
#include "PHY/TOOLS/tools_defs.h"
#include "SCHED_NR/sched_nr.h"
#include "SCHED_NR_UE/defs.h"
#include "SCHED_NR_UE/fapi_nr_ue_l1.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 "openair2/LAYER2/NR_MAC_UE/mac_proto.h"
//#define DEBUG_ULSIM
PHY_VARS_gNB *gNB;
PHY_VARS_NR_UE *UE;
RAN_CONTEXT_t RC;
int32_t uplink_frequency_offset[MAX_NUM_CCs][4];
double cpuf;
int nfapi_mode = 0;
// dummy functions
int8_t nr_mac_rrc_data_ind_ue(const module_id_t module_id, const int CC_id, const uint8_t gNB_index,
const int8_t channel, const uint8_t* pduP, const sdu_size_t pdu_len) { return 0; }
// needed for some functions
uint16_t n_rnti = 0x1234;
openair0_config_t openair0_cfg[MAX_CARDS];
int main(int argc, char **argv)
{
char c;
int i,sf;
double SNR, snr0 = -2.0, snr1 = 2.0;
double sigma, sigma_dB;
double snr_step = 0.1;
uint8_t snr1set = 0;
int slot = 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;
//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;
int number_of_frames = 1;
int frame_length_complex_samples;
NR_DL_FRAME_PARMS *frame_parms;
int loglvl = OAILOG_WARNING;
uint64_t SSB_positions=0x01;
uint16_t nb_symb_sch = 12;
int start_symbol = NR_SYMBOLS_PER_SLOT - nb_symb_sch;
uint16_t nb_rb = 50;
uint8_t Imcs = 9;
uint8_t precod_nbr_layers = 1;
int gNB_id = 0;
int ap;
int tx_offset;
double txlev_float;
int32_t txlev;
int start_rb = 0;
int UE_id =0; // [hna] only works for UE_id = 0 because NUMBER_OF_NR_UE_MAX is set to 1 (phy_init_nr_gNB causes segmentation fault)
cpuf = get_cpu_freq_GHz();
UE_nr_rxtx_proc_t UE_proc;
if ( load_configmodule(argc,argv,CONFIG_ENABLECMDLINEONLY) == 0 ) {
exit_fun("[NR_ULSIM] 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) {
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!\n");
exit(-1);
}
break;
/*case 'i':
interf1 = atoi(optarg);
break;
case 'j':
interf2 = atoi(optarg);
break;*/
case 'n':
number_of_frames = atoi(optarg);
break;
case 's':
snr0 = atof(optarg);
printf("Setting SNR0 to %f\n", snr0);
break;
case 'S':
snr1 = atof(optarg);
snr1set = 1;
printf("Setting SNR1 to %f\n", snr1);
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 > 2)) {
printf("Unsupported number of tx antennas %d\n", n_tx);
exit(-1);
}
break;
case 'z':
n_rx = atoi(optarg);
if ((n_rx == 0) || (n_rx > 2)) {
printf("Unsupported number of rx antennas %d\n", n_rx);
exit(-1);
}
break;
case 'M':
SSB_positions = atoi(optarg);
break;
case 'N':
Nid_cell = atoi(optarg);
break;
case 'R':
N_RB_DL = atoi(optarg);
N_RB_UL = N_RB_DL;
break;
case 'F':
input_fd = fopen(optarg, "r");
if (input_fd == NULL) {
printf("Problem with filename %s\n", optarg);
exit(-1);
}
break;
case 'm':
Imcs = atoi(optarg);
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) -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("-p Use extended prefix mode\n");
//printf("-d Use TDD\n");
printf("-n Number of frames to simulate\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("-t Delay spread for multipath channel\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("-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("-M Multiple SSB positions in burst\n");
printf("-N Nid_cell\n");
printf("-R N_RB_DL\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");
printf("-F Input filename (.txt format) for RX conformance testing\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),
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] = (PHY_VARS_gNB **) malloc(sizeof(PHY_VARS_gNB *));
RC.gNB[0][0] = malloc(sizeof(PHY_VARS_gNB));
gNB = RC.gNB[0][0];
//gNB_config = &gNB->gNB_config;
frame_parms = &gNB->frame_parms; //to be initialized I suppose (maybe not necessary for PBCH)
frame_parms->nb_antennas_tx = n_tx;
frame_parms->nb_antennas_rx = n_rx;
frame_parms->N_RB_DL = N_RB_DL;
frame_parms->N_RB_UL = N_RB_UL;
frame_parms->Ncp = extended_prefix_flag ? EXTENDED : NORMAL;
crcTableInit();
nr_phy_config_request_sim(gNB, N_RB_DL, N_RB_DL, mu, Nid_cell, SSB_positions);
phy_init_nr_gNB(gNB, 0, 0);
//init_eNB_afterRU();
frame_length_complex_samples = frame_parms->samples_per_subframe;
//frame_length_complex_samples_no_prefix = frame_parms->samples_per_subframe_wCP;
//configure UE
UE = malloc(sizeof(PHY_VARS_NR_UE));
memset((void*)UE,0,sizeof(PHY_VARS_NR_UE));
PHY_vars_UE_g = malloc(sizeof(PHY_VARS_NR_UE**));
PHY_vars_UE_g[0] = malloc(sizeof(PHY_VARS_NR_UE*));
PHY_vars_UE_g[0][0] = UE;
memcpy(&UE->frame_parms, frame_parms, sizeof(NR_DL_FRAME_PARMS));
//phy_init_nr_top(frame_parms);
if (init_nr_ue_signal(UE, 1, 0) != 0) {
printf("Error at UE NR initialisation\n");
exit(-1);
}
//nr_init_frame_parms_ue(&UE->frame_parms);
//init_nr_ue_transport(UE, 0);
for (sf = 0; sf < 2; sf++) {
for (i = 0; i < 2; i++) {
UE->ulsch[sf][0][i] = new_nr_ue_ulsch(N_RB_UL, 8, 0);
if (!UE->ulsch[sf][0][i]) {
printf("Can't get ue ulsch structures\n");
exit(-1);
}
}
}
unsigned char harq_pid = 0;
unsigned int TBS;
unsigned int available_bits;
uint8_t nb_re_dmrs = UE->dmrs_UplinkConfig.pusch_maxLength*(UE->dmrs_UplinkConfig.pusch_dmrs_type == pusch_dmrs_type1)?6:4;
uint8_t length_dmrs = 1;
unsigned char mod_order;
mod_order = nr_get_Qm(Imcs, 1);
available_bits = nr_get_G(nb_rb, nb_symb_sch, nb_re_dmrs, length_dmrs, mod_order, 1);
TBS = nr_compute_tbs(Imcs, nb_rb, nb_symb_sch, nb_re_dmrs, length_dmrs, precod_nbr_layers);
NR_gNB_ULSCH_t *ulsch_gNB = gNB->ulsch[UE_id+1][0];
nfapi_nr_ul_config_ulsch_pdu *rel15_ul = &ulsch_gNB->harq_processes[harq_pid]->ulsch_pdu;
NR_UE_ULSCH_t **ulsch_ue = UE->ulsch[0][0];
unsigned char *estimated_output_bit;
unsigned char *test_input_bit;
uint32_t errors_bit = 0;
uint32_t errors_scrambling = 0;
uint32_t frames_in_error = 0;
test_input_bit = (unsigned char *) malloc16(sizeof(unsigned char) * 16 * 68 * 384);
estimated_output_bit = (unsigned char *) malloc16(sizeof(unsigned char) * 16 * 68 * 384);
nr_scheduled_response_t scheduled_response;
fapi_nr_ul_config_request_t ul_config;
for (int frame = 0; frame < number_of_frames; frame++) {
// printf("***********\n");
// printf("frame = %d\n", frame);
// printf("***********\n");
UE_proc.nr_tti_tx = slot;
UE_proc.frame_tx = frame;
// --------- setting rel15_ul parameters for gNB --------
rel15_ul->rnti = n_rnti;
rel15_ul->ulsch_pdu_rel15.start_rb = start_rb;
rel15_ul->ulsch_pdu_rel15.number_rbs = nb_rb;
rel15_ul->ulsch_pdu_rel15.start_symbol = start_symbol;
rel15_ul->ulsch_pdu_rel15.number_symbols = nb_symb_sch;
rel15_ul->ulsch_pdu_rel15.nb_re_dmrs = nb_re_dmrs;
rel15_ul->ulsch_pdu_rel15.length_dmrs = length_dmrs;
rel15_ul->ulsch_pdu_rel15.Qm = mod_order;
rel15_ul->ulsch_pdu_rel15.mcs = Imcs;
rel15_ul->ulsch_pdu_rel15.rv = 0;
rel15_ul->ulsch_pdu_rel15.ndi = 0;
rel15_ul->ulsch_pdu_rel15.n_layers = precod_nbr_layers;
///////////////////////////////////////////////////
//fapi_nr_tx_request_t tx_request;
scheduled_response.module_id = 0;
scheduled_response.CC_id = 0;
scheduled_response.frame = frame;
scheduled_response.slot = slot;
scheduled_response.dl_config = NULL;
scheduled_response.ul_config = &ul_config;
scheduled_response.dl_config = NULL;
ul_config.sfn_slot = slot;
ul_config.number_pdus = 1;
ul_config.ul_config_list[0].pdu_type = FAPI_NR_UL_CONFIG_TYPE_PUSCH;
ul_config.ul_config_list[0].ulsch_config_pdu.rnti = n_rnti;
ul_config.ul_config_list[0].ulsch_config_pdu.ulsch_pdu_rel15.number_rbs = nb_rb;
ul_config.ul_config_list[0].ulsch_config_pdu.ulsch_pdu_rel15.start_rb = start_rb;
ul_config.ul_config_list[0].ulsch_config_pdu.ulsch_pdu_rel15.number_symbols = nb_symb_sch;
ul_config.ul_config_list[0].ulsch_config_pdu.ulsch_pdu_rel15.start_symbol = start_symbol;
ul_config.ul_config_list[0].ulsch_config_pdu.ulsch_pdu_rel15.mcs = Imcs;
ul_config.ul_config_list[0].ulsch_config_pdu.ulsch_pdu_rel15.ndi = 0;
ul_config.ul_config_list[0].ulsch_config_pdu.ulsch_pdu_rel15.rv = 0;
ul_config.ul_config_list[0].ulsch_config_pdu.ulsch_pdu_rel15.n_layers = precod_nbr_layers;
ul_config.ul_config_list[0].ulsch_config_pdu.ulsch_pdu_rel15.harq_process_nbr = harq_pid;
//there are plenty of other parameters that we don't seem to be using for now. e.g.
//ul_config.ul_config_list[0].ulsch_config_pdu.ulsch_pdu_rel15.absolute_delta_PUSCH = 0;
// set FAPI parameters for UE, put them in the scheduled response and call
nr_ue_scheduled_response(&scheduled_response);
/////////////////////////phy_procedures_nr_ue_TX///////////////////////
///////////
phy_procedures_nrUE_TX(UE, &UE_proc, gNB_id, 0);
///////////
////////////////////////////////////////////////////
tx_offset = slot*frame_parms->samples_per_slot;
txlev = signal_energy_amp_shift(&UE->common_vars.txdata[0][tx_offset + 5*frame_parms->ofdm_symbol_size + 4*frame_parms->nb_prefix_samples + frame_parms->nb_prefix_samples0],
frame_parms->ofdm_symbol_size + frame_parms->nb_prefix_samples);
txlev_float = (double)txlev/(double)AMP; // output of signal_energy is fixed point representation
for (SNR = snr0; SNR < snr1; SNR += snr_step) {
n_errors = 0;
n_false_positive = 0;
//AWGN
sigma_dB = 10*log10(txlev_float)-SNR;
sigma = pow(10,sigma_dB/10);
for (trial = 0; trial < n_trials; trial++) {
errors_scrambling = 0;
errors_bit = 0;
for (i=0; i<frame_length_complex_samples; i++) {
for (ap=0; ap<frame_parms->nb_antennas_rx; ap++) {
((short*) gNB->common_vars.rxdata[ap])[2*i] = (((int16_t *)UE->common_vars.txdata[ap])[(i<<1)]) + (int16_t)(sqrt(sigma/2)*gaussdouble(0.0,1.0)*(double)AMP); // convert to fixed point
((short*) gNB->common_vars.rxdata[ap])[2*i+1] = (((int16_t *)UE->common_vars.txdata[ap])[(i<<1)+1]) + (int16_t)(sqrt(sigma/2)*gaussdouble(0.0,1.0)*(double)AMP);
}
}
phy_procedures_gNB_common_RX(gNB, frame, slot);
phy_procedures_gNB_uespec_RX(gNB, frame, slot, rel15_ul->ulsch_pdu_rel15.start_symbol, rel15_ul->ulsch_pdu_rel15.start_symbol + rel15_ul->ulsch_pdu_rel15.number_symbols);
//----------------------------------------------------------
//---------------------- count errors ----------------------
//----------------------------------------------------------
for (i = 0; i < available_bits; i++) {
if(((ulsch_ue[0]->g[i] == 0) && (gNB->pusch_vars[UE_id]->llr[i] <= 0)) ||
((ulsch_ue[0]->g[i] == 1) && (gNB->pusch_vars[UE_id]->llr[i] >= 0)))
{
if(errors_scrambling == 0) {
printf("\n");
printf("First bit in error in unscrambling in frame %d = %d\n", frame, i);
}
errors_scrambling++;
}
}
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] = (ulsch_ue[0]->harq_processes[harq_pid]->b[i / 8] & (1 << (i & 7))) >> (i & 7); // Further correct for multiple segments
if (estimated_output_bit[i] != test_input_bit[i]) {
if(errors_bit == 0)
printf("First bit in error in decoding in frame %d = %d\n", frame, i);
errors_bit++;
}
}
////////////////////////////////////////////////////////////
if (errors_scrambling > 0) {
if (n_trials == 1)
printf("frame %d, errors_scrambling = %d (trial %d)\n", frame, errors_scrambling, trial);
}
if (errors_bit > 0) {
frames_in_error++;
n_false_positive++;
if (n_trials == 1)
printf("frame %d, errors_bit = %d (trial %d)\n", frame, errors_bit, trial);
printf("*****************************************\n");
printf("SNR %f, (false positive %f)\n", SNR,
(float) n_false_positive / (float) n_trials);
printf("*****************************************\n");
printf("\n");
}
} // [hna] for (trial = 0; trial < n_trials; trial++)
if (errors_bit == 0)
break;
} // [hna] for (SNR = snr0; SNR < snr1; SNR += snr_step)
} // frame loop
if(frames_in_error == 0) {
printf("*************\n");
printf("PUSCH test OK\n");
printf("*************\n");
}
printf("\n");
for (i = 0; i < 2; i++) {
printf("----------------------\n");
printf("freeing codeword %d\n", i);
printf("----------------------\n");
printf("gNB ulsch[0][%d]\n", i); // [hna] ulsch[0] is for RA
free_gNB_ulsch(gNB->ulsch[0][i]);
printf("gNB ulsch[%d][%d]\n",UE_id+1, i);
free_gNB_ulsch(gNB->ulsch[UE_id+1][i]); // "+1" because first element in ulsch is for RA
for (sf = 0; sf < 2; sf++) {
printf("UE ulsch[%d][0][%d]\n", sf, i);
if (UE->ulsch[sf][0][i])
free_nr_ue_ulsch(UE->ulsch[sf][0][i]);
}
printf("\n");
}
if (output_fd)
fclose(output_fd);
if (input_fd)
fclose(input_fd);
return (n_errors);
}