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srsRAN/lib/examples/pdsch_enodeb.c

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/*
* Copyright 2013-2019 Software Radio Systems Limited
*
* This file is part of srsLTE.
*
* srsLTE is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of
* the License, or (at your option) any later version.
*
* srsLTE is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* A copy of the GNU Affero General Public License can be found in
* the LICENSE file in the top-level directory of this distribution
* and at http://www.gnu.org/licenses/.
*
*/
#include "srslte/common/crash_handler.h"
#include "srslte/common/gen_mch_tables.h"
#include "srslte/srslte.h"
#include <pthread.h>
#include <semaphore.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <sys/select.h>
#include <unistd.h>
#define UE_CRNTI 0x1234
#define M_CRNTI 0xFFFD
#ifndef DISABLE_RF
#include "srslte/phy/common/phy_common.h"
#include "srslte/phy/rf/rf.h"
srslte_rf_t rf;
#else
#pragma message "Compiling pdsch_ue with no RF support"
#endif
char* output_file_name = NULL;
#define LEFT_KEY 68
#define RIGHT_KEY 67
#define UP_KEY 65
#define DOWN_KEY 66
srslte_cell_t cell = {
25, // nof_prb
1, // nof_ports
0, // cell_id
SRSLTE_CP_NORM, // cyclic prefix
SRSLTE_PHICH_NORM, // PHICH length
SRSLTE_PHICH_R_1, // PHICH resources
SRSLTE_FDD,
};
uint16_t c = -1;
int net_port = -1; // -1 generates random dataThat means there is some problem sending samples to the device
uint32_t cfi = 2;
uint32_t mcs_idx = 1, last_mcs_idx = 1;
int nof_frames = -1;
srslte_tm_t transmission_mode = SRSLTE_TM1;
uint32_t nof_tb = 1;
uint32_t multiplex_pmi = 0;
uint32_t multiplex_nof_layers = 1;
uint8_t mbsfn_sf_mask = 32;
int mbsfn_area_id = -1;
char* rf_args = "";
char* rf_dev = "";
float rf_amp = 0.8, rf_gain = 60.0, rf_freq = 2400000000;
static bool enable_256qam = false;
float output_file_snr = +INFINITY;
bool null_file_sink = false;
srslte_filesink_t fsink;
srslte_ofdm_t ifft[SRSLTE_MAX_PORTS];
srslte_ofdm_t ifft_mbsfn;
srslte_pbch_t pbch;
srslte_pcfich_t pcfich;
srslte_pdcch_t pdcch;
srslte_pdsch_t pdsch;
srslte_pdsch_cfg_t pdsch_cfg;
srslte_pmch_t pmch;
srslte_pmch_cfg_t pmch_cfg;
srslte_softbuffer_tx_t* softbuffers[SRSLTE_MAX_CODEWORDS];
srslte_regs_t regs;
srslte_dci_dl_t dci_dl;
int rvidx[SRSLTE_MAX_CODEWORDS] = {0, 0};
cf_t *sf_buffer[SRSLTE_MAX_PORTS] = {NULL}, *output_buffer[SRSLTE_MAX_PORTS] = {NULL};
int sf_n_re, sf_n_samples;
pthread_t net_thread;
void* net_thread_fnc(void* arg);
sem_t net_sem;
bool net_packet_ready = false;
srslte_netsource_t net_source;
srslte_netsink_t net_sink;
int prbset_num = 1, last_prbset_num = 1;
int prbset_orig = 0;
//#define DATA_BUFF_SZ 1024*128
// uint8_t data[8*DATA_BUFF_SZ], data2[DATA_BUFF_SZ];
// uint8_t data_tmp[DATA_BUFF_SZ];
#define DATA_BUFF_SZ 1024 * 1024
uint8_t *data_mbms, *data[2], data2[DATA_BUFF_SZ];
uint8_t data_tmp[DATA_BUFF_SZ];
void usage(char* prog)
{
printf("Usage: %s [Iagmfoncvpuxb]\n", prog);
#ifndef DISABLE_RF
printf("\t-I RF device [Default %s]\n", rf_dev);
printf("\t-a RF args [Default %s]\n", rf_args);
printf("\t-l RF amplitude [Default %.2f]\n", rf_amp);
printf("\t-g RF TX gain [Default %.2f dB]\n", rf_gain);
printf("\t-f RF TX frequency [Default %.1f MHz]\n", rf_freq / 1000000);
#else
printf("\t RF is disabled.\n");
#endif
printf("\t-o output_file [Default use RF board]\n");
printf("\t-m MCS index [Default %d]\n", mcs_idx);
printf("\t-n number of frames [Default %d]\n", nof_frames);
printf("\t-c cell id [Default %d]\n", cell.id);
printf("\t-p nof_prb [Default %d]\n", cell.nof_prb);
printf("\t-M MBSFN area id [Default %d]\n", mbsfn_area_id);
printf("\t-x Transmission mode [1-4] [Default %d]\n", transmission_mode + 1);
printf("\t-b Precoding Matrix Index (multiplex mode only)* [Default %d]\n", multiplex_pmi);
printf("\t-w Number of codewords/layers (multiplex mode only)* [Default %d]\n", multiplex_nof_layers);
printf("\t-u listen TCP/UDP port for input data (if mbsfn is active then the stream is over mbsfn only) (-1 is "
"random) [Default %d]\n",
net_port);
printf("\t-v [set srslte_verbose to debug, default none]\n");
printf("\t-s output file SNR [Default %f]\n", output_file_snr);
printf("\t-q Enable/Disable 256QAM modulation (default %s)\n", enable_256qam ? "enabled" : "disabled");
printf("\n");
printf("\t*: See 3GPP 36.212 Table 5.3.3.1.5-4 for more information\n");
}
void parse_args(int argc, char** argv)
{
int opt;
while ((opt = getopt(argc, argv, "IadglfmoncpqvutxbwMsB")) != -1) {
switch (opt) {
case 'I':
rf_dev = argv[optind];
break;
case 'a':
rf_args = argv[optind];
break;
case 'g':
rf_gain = strtof(argv[optind], NULL);
break;
case 'l':
rf_amp = strtof(argv[optind], NULL);
break;
case 'f':
rf_freq = strtof(argv[optind], NULL);
break;
case 'o':
output_file_name = argv[optind];
break;
case 'm':
mcs_idx = (uint32_t)strtol(argv[optind], NULL, 10);
break;
case 'u':
net_port = (int)strtol(argv[optind], NULL, 10);
break;
case 'n':
nof_frames = (int)strtol(argv[optind], NULL, 10);
break;
case 'p':
cell.nof_prb = (uint32_t)strtol(argv[optind], NULL, 10);
break;
case 'c':
cell.id = (uint32_t)strtol(argv[optind], NULL, 10);
break;
case 'x':
transmission_mode = (srslte_tm_t)(strtol(argv[optind], NULL, 10) - 1);
break;
case 'b':
multiplex_pmi = (uint32_t)strtol(argv[optind], NULL, 10);
break;
case 'w':
multiplex_nof_layers = (uint32_t)strtol(argv[optind], NULL, 10);
break;
case 'M':
mbsfn_area_id = (int)strtol(argv[optind], NULL, 10);
break;
case 'v':
srslte_verbose++;
break;
case 's':
output_file_snr = strtof(argv[optind], NULL);
break;
case 'B':
mbsfn_sf_mask = (uint8_t)strtol(argv[optind], NULL, 10);
break;
case 'q':
enable_256qam ^= true;
break;
default:
usage(argv[0]);
exit(-1);
}
}
#ifdef DISABLE_RF
if (!output_file_name) {
usage(argv[0]);
exit(-1);
}
#endif
}
void base_init()
{
int i;
/* Configure cell and PDSCH in function of the transmission mode */
switch (transmission_mode) {
case SRSLTE_TM1:
cell.nof_ports = 1;
break;
case SRSLTE_TM2:
case SRSLTE_TM3:
case SRSLTE_TM4:
cell.nof_ports = 2;
break;
default:
ERROR("Transmission mode %d not implemented or invalid\n", transmission_mode);
exit(-1);
}
/* Allocate memory */
for (i = 0; i < SRSLTE_MAX_CODEWORDS; i++) {
data[i] = srslte_vec_malloc(sizeof(uint8_t) * SOFTBUFFER_SIZE);
if (!data[i]) {
perror("malloc");
exit(-1);
}
bzero(data[i], sizeof(uint8_t) * SOFTBUFFER_SIZE);
}
data_mbms = srslte_vec_malloc(sizeof(uint8_t) * SOFTBUFFER_SIZE);
/* init memory */
for (i = 0; i < SRSLTE_MAX_PORTS; i++) {
sf_buffer[i] = srslte_vec_malloc(sizeof(cf_t) * sf_n_re);
if (!sf_buffer[i]) {
perror("malloc");
exit(-1);
}
}
for (i = 0; i < SRSLTE_MAX_PORTS; i++) {
output_buffer[i] = srslte_vec_malloc(sizeof(cf_t) * sf_n_samples);
if (!output_buffer[i]) {
perror("malloc");
exit(-1);
}
bzero(output_buffer[i], sizeof(cf_t) * sf_n_samples);
}
/* open file or USRP */
if (output_file_name) {
if (strcmp(output_file_name, "NULL")) {
if (srslte_filesink_init(&fsink, output_file_name, SRSLTE_COMPLEX_FLOAT_BIN)) {
ERROR("Error opening file %s\n", output_file_name);
exit(-1);
}
null_file_sink = false;
} else {
null_file_sink = true;
}
} else {
#ifndef DISABLE_RF
printf("Opening RF device...\n");
if (srslte_rf_open_devname(&rf, rf_dev, rf_args, cell.nof_ports)) {
fprintf(stderr, "Error opening rf\n");
exit(-1);
}
#else
printf("Error RF not available. Select an output file\n");
exit(-1);
#endif
}
if (net_port > 0) {
if (srslte_netsource_init(&net_source, "127.0.0.1", net_port, SRSLTE_NETSOURCE_UDP)) {
ERROR("Error creating input UDP socket at port %d\n", net_port);
exit(-1);
}
if (null_file_sink) {
if (srslte_netsink_init(&net_sink, "127.0.0.1", net_port + 1, SRSLTE_NETSINK_TCP)) {
ERROR("Error sink\n");
exit(-1);
}
}
if (sem_init(&net_sem, 0, 1)) {
perror("sem_init");
exit(-1);
}
}
/* create ifft object */
for (i = 0; i < cell.nof_ports; i++) {
if (srslte_ofdm_tx_init(&ifft[i], SRSLTE_CP_NORM, sf_buffer[i], output_buffer[i], cell.nof_prb)) {
ERROR("Error creating iFFT object\n");
exit(-1);
}
srslte_ofdm_set_normalize(&ifft[i], true);
}
if (srslte_ofdm_tx_init_mbsfn(&ifft_mbsfn, SRSLTE_CP_EXT, sf_buffer[0], output_buffer[0], cell.nof_prb)) {
ERROR("Error creating iFFT object\n");
exit(-1);
}
srslte_ofdm_set_non_mbsfn_region(&ifft_mbsfn, 2);
srslte_ofdm_set_normalize(&ifft_mbsfn, true);
if (srslte_pbch_init(&pbch)) {
ERROR("Error creating PBCH object\n");
exit(-1);
}
if (srslte_pbch_set_cell(&pbch, cell)) {
ERROR("Error creating PBCH object\n");
exit(-1);
}
if (srslte_regs_init(&regs, cell)) {
ERROR("Error initiating regs\n");
exit(-1);
}
if (srslte_pcfich_init(&pcfich, 1)) {
ERROR("Error creating PBCH object\n");
exit(-1);
}
if (srslte_pcfich_set_cell(&pcfich, &regs, cell)) {
ERROR("Error creating PBCH object\n");
exit(-1);
}
if (srslte_pdcch_init_enb(&pdcch, cell.nof_prb)) {
ERROR("Error creating PDCCH object\n");
exit(-1);
}
if (srslte_pdcch_set_cell(&pdcch, &regs, cell)) {
ERROR("Error creating PDCCH object\n");
exit(-1);
}
if (srslte_pdsch_init_enb(&pdsch, cell.nof_prb)) {
ERROR("Error creating PDSCH object\n");
exit(-1);
}
if (srslte_pdsch_set_cell(&pdsch, cell)) {
ERROR("Error creating PDSCH object\n");
exit(-1);
}
srslte_pdsch_set_rnti(&pdsch, UE_CRNTI);
if (mbsfn_area_id > -1) {
if (srslte_pmch_init(&pmch, cell.nof_prb, 1)) {
ERROR("Error creating PMCH object\n");
}
srslte_pmch_set_area_id(&pmch, mbsfn_area_id);
}
for (i = 0; i < SRSLTE_MAX_CODEWORDS; i++) {
softbuffers[i] = calloc(sizeof(srslte_softbuffer_tx_t), 1);
if (!softbuffers[i]) {
ERROR("Error allocating soft buffer\n");
exit(-1);
}
if (srslte_softbuffer_tx_init(softbuffers[i], cell.nof_prb)) {
ERROR("Error initiating soft buffer\n");
exit(-1);
}
}
}
void base_free()
{
int i;
for (i = 0; i < SRSLTE_MAX_CODEWORDS; i++) {
srslte_softbuffer_tx_free(softbuffers[i]);
if (softbuffers[i]) {
free(softbuffers[i]);
}
}
srslte_pdsch_free(&pdsch);
srslte_pdcch_free(&pdcch);
srslte_regs_free(&regs);
srslte_pbch_free(&pbch);
if (mbsfn_area_id > -1) {
srslte_pmch_free(&pmch);
}
srslte_ofdm_tx_free(&ifft_mbsfn);
for (i = 0; i < cell.nof_ports; i++) {
srslte_ofdm_tx_free(&ifft[i]);
}
for (i = 0; i < SRSLTE_MAX_CODEWORDS; i++) {
if (data[i]) {
free(data[i]);
}
}
for (i = 0; i < SRSLTE_MAX_PORTS; i++) {
if (sf_buffer[i]) {
free(sf_buffer[i]);
}
if (output_buffer[i]) {
free(output_buffer[i]);
}
}
if (output_file_name) {
if (!null_file_sink) {
srslte_filesink_free(&fsink);
}
} else {
#ifndef DISABLE_RF
srslte_rf_close(&rf);
#endif
}
if (net_port > 0) {
srslte_netsource_free(&net_source);
sem_close(&net_sem);
}
}
bool go_exit = false;
void sig_int_handler(int signo)
{
printf("SIGINT received. Exiting...\n");
if (signo == SIGINT) {
go_exit = true;
}
}
unsigned int reverse(register unsigned int x)
{
x = (((x & 0xaaaaaaaa) >> 1) | ((x & 0x55555555) << 1));
x = (((x & 0xcccccccc) >> 2) | ((x & 0x33333333) << 2));
x = (((x & 0xf0f0f0f0) >> 4) | ((x & 0x0f0f0f0f) << 4));
x = (((x & 0xff00ff00) >> 8) | ((x & 0x00ff00ff) << 8));
return ((x >> 16) | (x << 16));
}
uint32_t prbset_to_bitmask()
{
uint32_t mask = 0;
int nb = (int)ceilf((float)cell.nof_prb / srslte_ra_type0_P(cell.nof_prb));
for (int i = 0; i < nb; i++) {
if (i >= prbset_orig && i < prbset_orig + prbset_num) {
mask = mask | (0x1 << i);
}
}
return reverse(mask) >> (32 - nb);
}
int update_radl()
{
ZERO_OBJECT(dci_dl);
/* Configure cell and PDSCH in function of the transmission mode */
switch (transmission_mode) {
case SRSLTE_TM1:
case SRSLTE_TM2:
nof_tb = 1;
dci_dl.format = SRSLTE_DCI_FORMAT1;
break;
case SRSLTE_TM3:
dci_dl.format = SRSLTE_DCI_FORMAT2A;
nof_tb = 2;
break;
case SRSLTE_TM4:
dci_dl.format = SRSLTE_DCI_FORMAT2;
nof_tb = multiplex_nof_layers;
if (multiplex_nof_layers == 1) {
dci_dl.pinfo = (uint8_t)(multiplex_pmi + 1);
} else {
dci_dl.pinfo = (uint8_t)multiplex_pmi;
}
break;
default:
ERROR("Transmission mode not implemented.");
exit(-1);
}
dci_dl.rnti = UE_CRNTI;
dci_dl.pid = 0;
dci_dl.tb[0].mcs_idx = mcs_idx;
dci_dl.tb[0].ndi = 0;
dci_dl.tb[0].rv = rvidx[0];
dci_dl.tb[0].cw_idx = 0;
dci_dl.alloc_type = SRSLTE_RA_ALLOC_TYPE0;
dci_dl.type0_alloc.rbg_bitmask = prbset_to_bitmask();
if (nof_tb > 1) {
dci_dl.tb[1].mcs_idx = mcs_idx;
dci_dl.tb[1].ndi = 0;
dci_dl.tb[1].rv = rvidx[1];
dci_dl.tb[1].cw_idx = 1;
} else {
SRSLTE_DCI_TB_DISABLE(dci_dl.tb[1]);
}
srslte_dci_dl_fprint(stdout, &dci_dl, cell.nof_prb);
if (transmission_mode != SRSLTE_TM1) {
printf("\nTransmission mode key table:\n");
printf(" Mode | 1TB | 2TB |\n");
printf("----------+---------+-----+\n");
printf("Diversity | x | |\n");
printf(" CDD | | z |\n");
printf("Multiplex | q,w,e,r | a,s |\n");
printf("\n");
printf("Type new MCS index (0-28) or mode key and press Enter: ");
} else {
printf("Type new MCS index (0-28) and press Enter: ");
}
fflush(stdout);
return 0;
}
/* Read new MCS from stdin */
int update_control()
{
char input[128];
fd_set set;
FD_ZERO(&set);
FD_SET(0, &set);
struct timeval to;
to.tv_sec = 0;
to.tv_usec = 0;
int n = select(1, &set, NULL, NULL, &to);
if (n == 1) {
// stdin ready
if (fgets(input, sizeof(input), stdin)) {
if (input[0] == 27) {
switch (input[2]) {
case RIGHT_KEY:
if (prbset_orig + prbset_num < (int)ceilf((float)cell.nof_prb / srslte_ra_type0_P(cell.nof_prb)))
prbset_orig++;
break;
case LEFT_KEY:
if (prbset_orig > 0)
prbset_orig--;
break;
case UP_KEY:
if (prbset_num < (int)ceilf((float)cell.nof_prb / srslte_ra_type0_P(cell.nof_prb)))
prbset_num++;
break;
case DOWN_KEY:
last_prbset_num = prbset_num;
if (prbset_num > 0)
prbset_num--;
break;
}
} else {
switch (input[0]) {
case 'q':
transmission_mode = SRSLTE_TM4;
multiplex_pmi = 0;
multiplex_nof_layers = 1;
break;
case 'w':
transmission_mode = SRSLTE_TM4;
multiplex_pmi = 1;
multiplex_nof_layers = 1;
break;
case 'e':
transmission_mode = SRSLTE_TM4;
multiplex_pmi = 2;
multiplex_nof_layers = 1;
break;
case 'r':
transmission_mode = SRSLTE_TM4;
multiplex_pmi = 3;
multiplex_nof_layers = 1;
break;
case 'a':
transmission_mode = SRSLTE_TM4;
multiplex_pmi = 0;
multiplex_nof_layers = 2;
break;
case 's':
transmission_mode = SRSLTE_TM4;
multiplex_pmi = 1;
multiplex_nof_layers = 2;
break;
case 'z':
transmission_mode = SRSLTE_TM3;
break;
case 'x':
transmission_mode = SRSLTE_TM2;
break;
default:
last_mcs_idx = mcs_idx;
mcs_idx = strtol(input, NULL, 10);
}
}
bzero(input, sizeof(input));
if (update_radl()) {
printf("Trying with last known MCS index\n");
mcs_idx = last_mcs_idx;
prbset_num = last_prbset_num;
return update_radl();
}
}
return 0;
} else if (n < 0) {
// error
perror("select");
return -1;
} else {
return 0;
}
}
/** Function run in a separate thread to receive UDP data */
void* net_thread_fnc(void* arg)
{
int n;
int rpm = 0, wpm = 0;
do {
n = srslte_netsource_read(&net_source, &data2[rpm], DATA_BUFF_SZ - rpm);
if (n > 0) {
// TODO: I assume that both transport blocks have same size in case of 2 tb are active
int nbytes = 1 + (((mbsfn_area_id > -1) ? (pmch_cfg.pdsch_cfg.grant.tb[0].tbs)
: (pdsch_cfg.grant.tb[0].tbs + pdsch_cfg.grant.tb[1].tbs)) -
1) /
8;
rpm += n;
INFO("received %d bytes. rpm=%d/%d\n", n, rpm, nbytes);
wpm = 0;
while (rpm >= nbytes) {
// wait for packet to be transmitted
sem_wait(&net_sem);
if (mbsfn_area_id > -1) {
memcpy(data_mbms, &data2[wpm], nbytes);
} else {
memcpy(data[0], &data2[wpm], nbytes / (size_t)2);
memcpy(data[1], &data2[wpm], nbytes / (size_t)2);
}
INFO("Sent %d/%d bytes ready\n", nbytes, rpm);
rpm -= nbytes;
wpm += nbytes;
net_packet_ready = true;
}
if (wpm > 0) {
INFO("%d bytes left in buffer for next packet\n", rpm);
memcpy(data2, &data2[wpm], rpm * sizeof(uint8_t));
}
} else if (n == 0) {
rpm = 0;
} else {
ERROR("Error receiving from network\n");
exit(-1);
}
} while (n >= 0);
return NULL;
}
int main(int argc, char** argv)
{
int nf = 0, sf_idx = 0, N_id_2 = 0;
cf_t pss_signal[SRSLTE_PSS_LEN];
float sss_signal0[SRSLTE_SSS_LEN]; // for subframe 0
float sss_signal5[SRSLTE_SSS_LEN]; // for subframe 5
uint8_t bch_payload[SRSLTE_BCH_PAYLOAD_LEN];
int i;
cf_t* sf_symbols[SRSLTE_MAX_PORTS];
srslte_dci_msg_t dci_msg;
srslte_dci_location_t locations[SRSLTE_NOF_SF_X_FRAME][30];
uint32_t sfn;
srslte_refsignal_t csr_refs;
srslte_refsignal_t mbsfn_refs;
srslte_debug_handle_crash(argc, argv);
#ifdef DISABLE_RF
if (argc < 3) {
usage(argv[0]);
exit(-1);
}
#endif
parse_args(argc, argv);
uint8_t mch_table[10];
bzero(&mch_table[0], sizeof(uint8_t) * 10);
if (mbsfn_area_id > -1) {
generate_mcch_table(mch_table, mbsfn_sf_mask);
}
N_id_2 = cell.id % 3;
sf_n_re = 2 * SRSLTE_CP_NORM_NSYMB * cell.nof_prb * SRSLTE_NRE;
sf_n_samples = 2 * SRSLTE_SLOT_LEN(srslte_symbol_sz(cell.nof_prb));
cell.phich_length = SRSLTE_PHICH_NORM;
cell.phich_resources = SRSLTE_PHICH_R_1;
sfn = 0;
prbset_num = (int)ceilf((float)cell.nof_prb / srslte_ra_type0_P(cell.nof_prb));
last_prbset_num = prbset_num;
/* this *must* be called after setting slot_len_* */
base_init();
/* Generate PSS/SSS signals */
srslte_pss_generate(pss_signal, N_id_2);
srslte_sss_generate(sss_signal0, sss_signal5, cell.id);
/* Generate reference signals */
if (srslte_refsignal_cs_init(&csr_refs, cell.nof_prb)) {
ERROR("Error initializing equalizer\n");
exit(-1);
}
if (mbsfn_area_id > -1) {
if (srslte_refsignal_mbsfn_init(&mbsfn_refs, cell.nof_prb)) {
ERROR("Error initializing equalizer\n");
exit(-1);
}
if (srslte_refsignal_mbsfn_set_cell(&mbsfn_refs, cell, mbsfn_area_id)) {
ERROR("Error initializing MBSFNR signal\n");
exit(-1);
}
}
if (srslte_refsignal_cs_set_cell(&csr_refs, cell)) {
ERROR("Error setting cell\n");
exit(-1);
}
for (i = 0; i < SRSLTE_MAX_PORTS; i++) {
sf_symbols[i] = sf_buffer[i % cell.nof_ports];
}
#ifndef DISABLE_RF
sigset_t sigset;
sigemptyset(&sigset);
sigaddset(&sigset, SIGINT);
sigprocmask(SIG_UNBLOCK, &sigset, NULL);
signal(SIGINT, sig_int_handler);
if (!output_file_name) {
int srate = srslte_sampling_freq_hz(cell.nof_prb);
if (srate != -1) {
printf("Setting sampling rate %.2f MHz\n", (float)srate / 1000000);
float srate_rf = srslte_rf_set_tx_srate(&rf, (double)srate);
if (srate_rf != srate) {
ERROR("Could not set sampling rate\n");
exit(-1);
}
} else {
ERROR("Invalid number of PRB %d\n", cell.nof_prb);
exit(-1);
}
printf("Set TX gain: %.1f dB\n", srslte_rf_set_tx_gain(&rf, rf_gain));
printf("Set TX freq: %.2f MHz\n", srslte_rf_set_tx_freq(&rf, cell.nof_ports, rf_freq) / 1000000);
}
#endif
if (update_radl()) {
exit(-1);
}
if (net_port > 0) {
if (pthread_create(&net_thread, NULL, net_thread_fnc, NULL)) {
perror("pthread_create");
exit(-1);
}
}
pmch_cfg.pdsch_cfg.grant.tb[0].tbs = 1096;
srslte_dl_sf_cfg_t dl_sf;
ZERO_OBJECT(dl_sf);
/* Initiate valid DCI locations */
for (i = 0; i < SRSLTE_NOF_SF_X_FRAME; i++) {
dl_sf.cfi = cfi;
dl_sf.tti = i;
srslte_pdcch_ue_locations(&pdcch, &dl_sf, locations[i], 30, UE_CRNTI);
}
nf = 0;
bool send_data = false;
for (i = 0; i < SRSLTE_MAX_CODEWORDS; i++) {
srslte_softbuffer_tx_reset(softbuffers[i]);
}
#ifndef DISABLE_RF
bool start_of_burst = true;
#endif
ZERO_OBJECT(pdsch_cfg);
for (uint32_t j = 0; j < SRSLTE_MAX_CODEWORDS; j++) {
pdsch_cfg.softbuffers.tx[j] = softbuffers[j];
}
pdsch_cfg.rnti = UE_CRNTI;
pmch_cfg.pdsch_cfg = pdsch_cfg;
while ((nf < nof_frames || nof_frames == -1) && !go_exit) {
for (sf_idx = 0; sf_idx < SRSLTE_NOF_SF_X_FRAME && (nf < nof_frames || nof_frames == -1) && !go_exit; sf_idx++) {
/* Set Antenna port resource elements to zero */
bzero(sf_symbols[0], sizeof(cf_t) * sf_n_re);
if (sf_idx == 0 || sf_idx == 5) {
srslte_pss_put_slot(pss_signal, sf_symbols[0], cell.nof_prb, SRSLTE_CP_NORM);
srslte_sss_put_slot(sf_idx ? sss_signal5 : sss_signal0, sf_symbols[0], cell.nof_prb, SRSLTE_CP_NORM);
}
/* Copy zeros, SSS, PSS into the rest of antenna ports */
for (i = 1; i < cell.nof_ports; i++) {
memcpy(sf_symbols[i], sf_symbols[0], sizeof(cf_t) * sf_n_re);
}
if (mch_table[sf_idx] == 1 && mbsfn_area_id > -1) {
srslte_refsignal_mbsfn_put_sf(cell, 0, csr_refs.pilots[0][sf_idx], mbsfn_refs.pilots[0][sf_idx], sf_symbols[0]);
} else {
dl_sf.tti = nf * 10 + sf_idx;
for (i = 0; i < cell.nof_ports; i++) {
srslte_refsignal_cs_put_sf(&csr_refs, &dl_sf, (uint32_t)i, sf_symbols[i]);
}
}
srslte_pbch_mib_pack(&cell, sfn, bch_payload);
if (sf_idx == 0) {
srslte_pbch_encode(&pbch, bch_payload, sf_symbols, nf % 4);
}
dl_sf.tti = nf * 10 + sf_idx;
dl_sf.cfi = cfi;
srslte_pcfich_encode(&pcfich, &dl_sf, sf_symbols);
/* Update DL resource allocation from control port */
if (update_control()) {
ERROR("Error updating parameters from control port\n");
}
/* Transmit PDCCH + PDSCH only when there is data to send */
if ((net_port > 0) && (mch_table[sf_idx] == 1 && mbsfn_area_id > -1)) {
send_data = net_packet_ready;
if (net_packet_ready) {
INFO("Transmitting packet from port\n");
}
} else {
INFO("SF: %d, Generating %d random bits\n", sf_idx, pdsch_cfg.grant.tb[0].tbs + pdsch_cfg.grant.tb[1].tbs);
for (uint32_t tb = 0; tb < SRSLTE_MAX_CODEWORDS; tb++) {
if (pdsch_cfg.grant.tb[tb].enabled) {
for (i = 0; i < pdsch_cfg.grant.tb[tb].tbs / 8; i++) {
data[tb][i] = (uint8_t)rand();
}
}
}
/* Uncomment this to transmit on sf 0 and 5 only */
if (sf_idx != 0 && sf_idx != 5) {
send_data = true;
} else {
send_data = false;
}
}
if (send_data) {
if (mch_table[sf_idx] == 0 || mbsfn_area_id < 0) { // PDCCH + PDSCH
dl_sf.sf_type = SRSLTE_SF_NORM;
/* Encode PDCCH */
INFO("Putting DCI to location: n=%d, L=%d\n", locations[sf_idx][0].ncce, locations[sf_idx][0].L);
srslte_dci_msg_pack_pdsch(&cell, &dl_sf, NULL, &dci_dl, &dci_msg);
dci_msg.location = locations[sf_idx][0];
if (srslte_pdcch_encode(&pdcch, &dl_sf, &dci_msg, sf_symbols)) {
ERROR("Error encoding DCI message\n");
exit(-1);
}
/* Configure pdsch_cfg parameters */
if (srslte_ra_dl_dci_to_grant(&cell, &dl_sf, transmission_mode, enable_256qam, &dci_dl, &pdsch_cfg.grant)) {
ERROR("Error configuring PDSCH\n");
exit(-1);
}
/* Encode PDSCH */
if (srslte_pdsch_encode(&pdsch, &dl_sf, &pdsch_cfg, data, sf_symbols)) {
ERROR("Error encoding PDSCH\n");
exit(-1);
}
if (net_port > 0 && net_packet_ready) {
if (null_file_sink) {
for (uint32_t tb = 0; tb < SRSLTE_MAX_CODEWORDS; tb++) {
srslte_bit_pack_vector(data[tb], data_tmp, pdsch_cfg.grant.tb[tb].tbs);
if (srslte_netsink_write(&net_sink, data_tmp, 1 + (pdsch_cfg.grant.tb[tb].tbs - 1) / 8) < 0) {
ERROR("Error sending data through UDP socket\n");
}
}
}
if (mbsfn_area_id < 0) {
net_packet_ready = false;
sem_post(&net_sem);
}
}
} else { // We're sending MCH on subframe 1 - PDCCH + PMCH
dl_sf.sf_type = SRSLTE_SF_MBSFN;
/* Force 1 word and MCS 2 */
dci_dl.rnti = SRSLTE_MRNTI;
dci_dl.alloc_type = SRSLTE_RA_ALLOC_TYPE0;
dci_dl.type0_alloc.rbg_bitmask = 0xffffffff;
dci_dl.tb[0].mcs_idx = 2;
dci_dl.format = SRSLTE_DCI_FORMAT1;
/* Configure pdsch_cfg parameters */
if (srslte_ra_dl_dci_to_grant(&cell, &dl_sf, SRSLTE_TM1, enable_256qam, &dci_dl, &pmch_cfg.pdsch_cfg.grant)) {
ERROR("Error configuring PDSCH\n");
exit(-1);
}
for (int j = 0; j < pmch_cfg.pdsch_cfg.grant.tb[0].tbs / 8; j++) {
data_mbms[j] = j % 255;
}
pmch_cfg.area_id = mbsfn_area_id;
/* Encode PMCH */
if (srslte_pmch_encode(&pmch, &dl_sf, &pmch_cfg, data_mbms, sf_symbols)) {
ERROR("Error encoding PDSCH\n");
exit(-1);
}
if (net_port > 0 && net_packet_ready) {
if (null_file_sink) {
srslte_bit_pack_vector(data[0], data_tmp, pmch_cfg.pdsch_cfg.grant.tb[0].tbs);
if (srslte_netsink_write(&net_sink, data_tmp, 1 + (pmch_cfg.pdsch_cfg.grant.tb[0].tbs - 1) / 8) < 0) {
ERROR("Error sending data through UDP socket\n");
}
}
net_packet_ready = false;
sem_post(&net_sem);
}
}
}
/* Transform to OFDM symbols */
if (mch_table[sf_idx] == 0 || mbsfn_area_id < 0) {
for (i = 0; i < cell.nof_ports; i++) {
srslte_ofdm_tx_sf(&ifft[i]);
}
} else {
srslte_ofdm_tx_sf(&ifft_mbsfn);
}
/* send to file or usrp */
if (output_file_name) {
if (!null_file_sink) {
/* Apply AWGN */
if (output_file_snr != +INFINITY) {
float var = srslte_convert_dB_to_amplitude(-(output_file_snr + 3.0f));
for (int k = 0; k < cell.nof_ports; k++) {
srslte_ch_awgn_c(output_buffer[k], output_buffer[k], var, sf_n_samples);
}
}
srslte_filesink_write_multi(&fsink, (void**)output_buffer, sf_n_samples, cell.nof_ports);
}
usleep(1000);
} else {
#ifndef DISABLE_RF
float norm_factor = (float)cell.nof_prb / 15 / sqrtf(pdsch_cfg.grant.nof_prb);
for (i = 0; i < cell.nof_ports; i++) {
srslte_vec_sc_prod_cfc(
output_buffer[i], rf_amp * norm_factor, output_buffer[i], SRSLTE_SF_LEN_PRB(cell.nof_prb));
}
srslte_rf_send_multi(&rf, (void**)output_buffer, sf_n_samples, true, start_of_burst, false);
start_of_burst = false;
#endif
}
}
nf++;
sfn = (sfn + 1) % 1024;
}
base_free();
printf("Done\n");
exit(0);
}
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