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Corrected LBRM functionality

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master
Xavier Arteaga 3 years ago committed by Andre Puschmann
parent 2aa59a55d5
commit 8e5fe9018b
3 changed files with 29 additions and 20 deletions
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7
lib/include/srsran/phy/phch/sch_cfg_nr.h
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@ -19,8 +19,11 @@ typedef struct SRSRAN_API {
srsran_mcs_table_t mcs_table; ///< @brief Indicates the MCS table the UE shall use for PDSCH and/or PUSCH without
///< transform precoding
srsran_xoverhead_t xoverhead; ///< Accounts for overhead from CSI-RS, CORESET, etc. If the field is absent, the UE
///< applies value xOh0 (see TS 38.214 [19], clause 5.1.3.2).
srsran_xoverhead_t xoverhead; ///< @brief Accounts for overhead from CSI-RS, CORESET, etc. If the field is absent, the
///< UE applies value xOh0 (see TS 38.214 [19], clause 5.1.3.2).
bool limited_buffer_rm; ///< @brief Enables LBRM (Limited buffer rate-matching). Given by rateMatching parameter in
///< PUSCH-ServingCellConfig or PDSCH-ServingCellConfig ASN1 sequences
} srsran_sch_cfg_t;
typedef struct SRSRAN_API {

14
lib/src/phy/phch/sch_nr.c
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@ -87,7 +87,7 @@ static int sch_nr_Nref(uint32_t N_rb, srsran_mcs_table_t mcs_table, uint32_t max
uint32_t N_re_lbrm = SRSRAN_MAX_NRE_NR * sch_nr_n_prb_lbrm(N_rb);
double TCR_lbrm = 948.0 / 1024.0;
uint32_t Qm_lbrm = (mcs_table == srsran_mcs_table_256qam) ? 8 : 6;
uint32_t TBS_LRBM = srsran_ra_nr_tbs(N_re_lbrm, 1.0, TCR_lbrm, Qm_lbrm, max_mimo_layers);
uint32_t TBS_LRBM = srsran_ra_nr_tbs(N_re_lbrm, 1.0, TCR_lbrm, Qm_lbrm, SRSRAN_MIN(4, max_mimo_layers));
double R = 2.0 / 3.0;
srsran_basegraph_t bg = srsran_sch_nr_select_basegraph(TBS_LRBM, R);
@ -141,11 +141,15 @@ int srsran_sch_nr_fill_tb_info(const srsran_carrier_nr_t* carrier,
cfg->Nl = tb->N_L;
// Calculate Nref
int Nref = sch_nr_Nref(carrier->nof_prb, sch_cfg->mcs_table, carrier->max_mimo_layers);
if (Nref < SRSRAN_SUCCESS) {
ERROR("Error computing N_ref");
if (sch_cfg->limited_buffer_rm) {
int Nref = sch_nr_Nref(carrier->nof_prb, sch_cfg->mcs_table, 4);
if (Nref < SRSRAN_SUCCESS) {
ERROR("Error computing N_ref");
}
cfg->Nref = (uint32_t)Nref;
} else {
cfg->Nref = SRSRAN_LDPC_MAX_LEN_ENCODED_CB;
}
cfg->Nref = (uint32_t)Nref;
// Calculate number of code blocks after applying CBGTI... not implemented, activate all CB
for (uint32_t r = 0; r < cbsegm.C; r++) {

28
lib/test/phy/phy_dl_nr_test.c
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@ -19,17 +19,18 @@
#include "srsran/phy/utils/vector.h"
#include <getopt.h>
static srsran_carrier_nr_t carrier = SRSRAN_DEFAULT_CARRIER_NR;
static uint32_t n_prb = 0; // Set to 0 for steering
static uint32_t mcs = 30; // Set to 30 for steering
static srsran_sch_cfg_nr_t pdsch_cfg = {};
static uint32_t nof_slots = 10;
static uint32_t rv_idx = 0;
static uint32_t delay_n = 0; // Integer delay
static float cfo_hz = 0.0f; // CFO Hz
static srsran_dmrs_sch_type_t dmrs_type = srsran_dmrs_sch_type_1;
static srsran_dmrs_sch_add_pos_t dmrs_add_pos = srsran_dmrs_sch_add_pos_2;
static bool interleaved_pdcch = false;
static srsran_carrier_nr_t carrier = SRSRAN_DEFAULT_CARRIER_NR;
static uint32_t n_prb = 0; // Set to 0 for steering
static uint32_t mcs = 30; // Set to 30 for steering
static srsran_sch_cfg_nr_t pdsch_cfg = {};
static uint32_t nof_slots = 10;
static uint32_t rv_idx = 0;
static uint32_t delay_n = 0; // Integer delay
static float cfo_hz = 0.0f; // CFO Hz
static srsran_dmrs_sch_type_t dmrs_type = srsran_dmrs_sch_type_1;
static srsran_dmrs_sch_add_pos_t dmrs_add_pos = srsran_dmrs_sch_add_pos_2;
static bool interleaved_pdcch = false;
static uint32_t nof_dmrs_cdm_groups_without_data = 1;
static void usage(char* prog)
{
@ -79,7 +80,7 @@ static int parse_args(int argc, char** argv)
dmrs_type = srsran_dmrs_sch_type_2;
break;
}
switch (strtol(argv[optind], NULL, 10)) {
switch (strtol(argv[optind++], NULL, 10)) {
case 0:
dmrs_add_pos = srsran_dmrs_sch_add_pos_0;
break;
@ -93,6 +94,7 @@ static int parse_args(int argc, char** argv)
dmrs_add_pos = srsran_dmrs_sch_add_pos_3;
break;
}
nof_dmrs_cdm_groups_without_data = (uint32_t)strtol(argv[optind], NULL, 10);
break;
case 'T':
pdsch_cfg.sch_cfg.mcs_table = srsran_mcs_table_from_str(argv[optind]);
@ -357,7 +359,7 @@ int main(int argc, char** argv)
pdsch_cfg.grant.L = 13;
pdsch_cfg.grant.nof_layers = carrier.max_mimo_layers;
pdsch_cfg.grant.dci_format = srsran_dci_format_nr_1_0;
pdsch_cfg.grant.nof_dmrs_cdm_groups_without_data = 1;
pdsch_cfg.grant.nof_dmrs_cdm_groups_without_data = nof_dmrs_cdm_groups_without_data;
pdsch_cfg.grant.beta_dmrs = srsran_convert_dB_to_amplitude(3);
pdsch_cfg.grant.rnti_type = srsran_rnti_type_c;
pdsch_cfg.grant.rnti = 0x4601;

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