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gnb,rrc: use phy helper to generate coreset#0

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Francisco 2021-11-05 15:16:37 +00:00 committed by Francisco Paisana
parent 2fc41acd9a
commit a137835d07
1 changed files with 17 additions and 12 deletions
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29
srsgnb/src/stack/rrc/rrc_nr.cc
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@ -47,18 +47,23 @@ int rrc_nr::init(const rrc_nr_cfg_t& cfg_,
cfg = cfg_;
if (cfg.is_standalone) {
// Generate parameters of Coreset#0 and SS#0
// Taken from TS 38.211, Section 7.3.2.2
cfg.cell_list[0].phy_cell.pdcch.coreset_present[0] = true;
cfg.cell_list[0].phy_cell.pdcch.coreset[0].id = 0;
cfg.cell_list[0].phy_cell.pdcch.coreset[0].mapping_type = srsran_coreset_mapping_type_interleaved;
cfg.cell_list[0].phy_cell.pdcch.coreset[0].reg_bundle_size = srsran_coreset_bundle_size_n6;
cfg.cell_list[0].phy_cell.pdcch.coreset[0].interleaver_size = srsran_coreset_bundle_size_n2;
cfg.cell_list[0].phy_cell.pdcch.coreset[0].shift_index = cfg.cell_list[0].phy_cell.cell_id;
cfg.cell_list[0].phy_cell.pdcch.coreset[0].precoder_granularity = srsran_coreset_precoder_granularity_reg_bundle;
for (uint32_t i = 0; i < SRSRAN_CORESET_FREQ_DOMAIN_RES_SIZE; i++) {
cfg.cell_list[0].phy_cell.pdcch.coreset[0].freq_resources[i] = true;
}
cfg.cell_list[0].phy_cell.pdcch.coreset[0].duration = 1;
const uint32_t coreset0_idx = 7;
cfg.cell_list[0].phy_cell.pdcch.coreset_present[0] = true;
// Get pointA and SSB absolute frequencies
double pointA_abs_freq_Hz = cfg.cell_list[0].phy_cell.carrier.dl_center_frequency_hz -
cfg.cell_list[0].phy_cell.carrier.nof_prb * SRSRAN_NRE *
SRSRAN_SUBC_SPACING_NR(cfg.cell_list[0].phy_cell.carrier.scs) / 2;
double ssb_abs_freq_Hz = cfg.cell_list[0].phy_cell.carrier.ssb_center_freq_hz;
// Calculate integer SSB to pointA frequency offset in Hz
uint32_t ssb_pointA_freq_offset_Hz =
(ssb_abs_freq_Hz > pointA_abs_freq_Hz) ? (uint32_t)(ssb_abs_freq_Hz - pointA_abs_freq_Hz) : 0;
int ret = srsran_coreset_zero(cfg.cell_list[0].phy_cell.cell_id,
ssb_pointA_freq_offset_Hz,
cfg.cell_list[0].ssb_cfg.scs,
cfg.cell_list[0].phy_cell.carrier.scs,
coreset0_idx,
&cfg.cell_list[0].phy_cell.pdcch.coreset[0]);
srsran_assert(ret == SRSRAN_SUCCESS, "Failed to generate CORESET#0");
cfg.cell_list[0].phy_cell.pdcch.search_space_present[0] = true;
cfg.cell_list[0].phy_cell.pdcch.search_space[0].id = 0;
cfg.cell_list[0].phy_cell.pdcch.search_space[0].coreset_id = 0;