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srsLTE
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Add SSB to configuration factory

This commit is contained in:
Andre Puschmann 2021-10-04 10:41:53 +02:00
parent 5b0767772b
commit 7496b7c14f
3 changed files with 45 additions and 0 deletions
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7
lib/include/srsran/common/phy_cfg_nr.h
View File

@ -148,6 +148,13 @@ struct phy_cfg_nr_t {
bool get_pusch_uci_cfg(const srsran_slot_cfg_t& slot_cfg,
const srsran_uci_cfg_nr_t& uci_cfg,
srsran_sch_cfg_nr_t& pusch_cfg) const;
/**
* @brief Generate SSB configuration from the overall configuration
* @attention Sampling rate is the only parameter missing
* @return valid SSB configuration
*/
srsran_ssb_cfg_t get_ssb_cfg() const;
};
} // namespace srsran

27
lib/src/common/phy_cfg_nr.cc
View File

@ -11,6 +11,7 @@
*/
#include "srsran/common/phy_cfg_nr.h"
#include "srsran/common/band_helper.h"
#include "srsran/srsran.h"
namespace srsran {
@ -337,4 +338,30 @@ bool phy_cfg_nr_t::get_pusch_uci_cfg(const srsran_slot_cfg_t& slot_cfg,
return true;
}
srsran_ssb_cfg_t phy_cfg_nr_t::get_ssb_cfg() const
{
// Retrieve band
srsran::srsran_band_helper bh = srsran::srsran_band_helper();
uint16_t band = bh.get_band_from_dl_freq_Hz(carrier.dl_center_frequency_hz);
srsran_assert(band != UINT16_MAX,
"DL frequency %f MHz does not belong to any valid band",
carrier.dl_center_frequency_hz / 1e6);
// Make SSB configuration
srsran_ssb_cfg_t ssb_cfg = {};
ssb_cfg.center_freq_hz = carrier.dl_center_frequency_hz;
ssb_cfg.ssb_freq_hz = carrier.ssb_center_freq_hz;
ssb_cfg.scs = ssb.scs;
ssb_cfg.pattern = bh.get_ssb_pattern(band, ssb.scs);
ssb_cfg.duplex_mode = duplex.mode;
ssb_cfg.periodicity_ms = ssb.periodicity_ms;
srsran_assert(ssb_cfg.pattern != SRSRAN_SSB_PATTERN_INVALID,
"Invalid SSB pattern for band %d and SSB subcarrier spacing %s",
band,
srsran_subcarrier_spacing_to_str(ssb.scs));
return ssb_cfg;
}
} // namespace srsran

11
lib/src/common/phy_cfg_nr_default.cc
View File

@ -417,6 +417,17 @@ phy_cfg_nr_default_t::phy_cfg_nr_default_t(const reference_cfg_t& reference_cfg)
srsran_assertion_failure("Invalid TDD reference");
}
if (duplex.mode == SRSRAN_DUPLEX_MODE_TDD) {
carrier.dl_center_frequency_hz = 3513.6e6;
ssb.scs = srsran_subcarrier_spacing_30kHz;
} else {
carrier.dl_center_frequency_hz = 881.5e6;
ssb.scs = srsran_subcarrier_spacing_15kHz;
}
carrier.ssb_center_freq_hz = carrier.dl_center_frequency_hz;
ssb.position_in_burst[0] = true;
ssb.periodicity_ms = 5;
switch (reference_cfg.pdcch) {
case reference_cfg_t::R_PDCCH_CUSTOM_COMMON_SS:
make_pdcch_custom_common_ss(pdcch, carrier);