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automatic selection of SIB1 TDA

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This commit is contained in:
francescomani
2025-12-20 08:54:11 +01:00
parent b916c6d8d4
commit 2454a2ea1e
33 changed files with 91 additions and 115 deletions
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openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_bch.c
+68 -51
View File
@@ -255,7 +255,7 @@ void schedule_nr_mib(module_id_t module_idP, frame_t frameP, slot_t slotP, nfapi
}
}
static void update_rb_mcs_tbs(NR_sched_pdsch_t *pdsch, uint32_t num_total_bytes, uint16_t *vrb_map)
static bool update_rb_mcs_tbs(NR_sched_pdsch_t *pdsch, uint32_t num_total_bytes, uint16_t *vrb_map)
{
const NR_tda_info_t *tda_info = &pdsch->tda_info;
@@ -296,12 +296,15 @@ static void update_rb_mcs_tbs(NR_sched_pdsch_t *pdsch, uint32_t num_total_bytes,
break;
}
}
AssertFatal(pdsch->tb_size >= num_total_bytes,
"Couldn't allocate enough resources for %d bytes in SIB PDSCH (rbStart %d, rbSize %d, bwpSize %d)\n",
num_total_bytes,
pdsch->rbStart,
pdsch->rbSize,
bwpSize);
if (pdsch->tb_size < num_total_bytes) {
LOG_D(NR_MAC,
"Couldn't allocate enough resources for %d bytes in SIB PDSCH (rbStart %d, rbSize %d, bwpSize %d)\n",
num_total_bytes,
pdsch->rbStart,
pdsch->rbSize,
bwpSize);
return false;
}
LOG_D(NR_MAC,
"mcs=%i, startSymbolIndex = %i, nrOfSymbols = %i, rbSize = %i, TBS = %i, dmrs_length %d, N_PRB_DMRS = %d, mappingtype = %d\n",
@@ -313,6 +316,7 @@ static void update_rb_mcs_tbs(NR_sched_pdsch_t *pdsch, uint32_t num_total_bytes,
pdsch->dmrs_parms.N_DMRS_SLOT,
N_PRB_DMRS,
tda_info->mapping_type);
return true;
}
static NR_sched_pdsch_t schedule_control_sib1(gNB_MAC_INST *gNB_mac,
@@ -342,11 +346,12 @@ static NR_sched_pdsch_t schedule_control_sib1(gNB_MAC_INST *gNB_mac,
uint8_t nr_of_candidates = 0;
for (int i=0; i<3; i++) {
for (int i = 0; i < 3; i++) {
find_aggregation_candidates(&gNB_mac->sched_ctrlCommon->aggregation_level, &nr_of_candidates, gNB_mac->sched_ctrlCommon->search_space,4<<i);
if (nr_of_candidates>0) break; // choosing the lower value of aggregation level available
if (nr_of_candidates > 0)
break; // choosing the lower value of aggregation level available
}
AssertFatal(nr_of_candidates>0,"nr_of_candidates is 0\n");
AssertFatal(nr_of_candidates > 0, "nr_of_candidates is 0\n");
gNB_mac->sched_ctrlCommon->cce_index = find_pdcch_candidate(gNB_mac,
CC_id,
gNB_mac->sched_ctrlCommon->aggregation_level,
@@ -358,18 +363,21 @@ static NR_sched_pdsch_t schedule_control_sib1(gNB_MAC_INST *gNB_mac,
AssertFatal(gNB_mac->sched_ctrlCommon->cce_index >= 0, "Could not find CCE for coreset0\n");
update_rb_mcs_tbs(&pdsch, gNB_mac->sched_ctrlCommon->num_total_bytes, vrb_map);
bool success = update_rb_mcs_tbs(&pdsch, gNB_mac->sched_ctrlCommon->num_total_bytes, vrb_map);
if (success) {
// Mark the corresponding RBs as used
fill_pdcch_vrb_map(gNB_mac,
CC_id,
pdcch,
gNB_mac->sched_ctrlCommon->cce_index,
gNB_mac->sched_ctrlCommon->aggregation_level,
beam);
for (int rb = 0; rb < pdsch.rbSize; rb++) {
vrb_map[rb + type0_PDCCH_CSS_config->cset_start_rb] |= SL_to_bitmap(tda_info->startSymbolIndex, tda_info->nrOfSymbols);
}
} else
pdsch.tb_size = 0; // to signal we couldn't allocate TBS
// Mark the corresponding RBs as used
fill_pdcch_vrb_map(gNB_mac,
CC_id,
pdcch,
gNB_mac->sched_ctrlCommon->cce_index,
gNB_mac->sched_ctrlCommon->aggregation_level,
beam);
for (int rb = 0; rb < pdsch.rbSize; rb++) {
vrb_map[rb + type0_PDCCH_CSS_config->cset_start_rb] |= SL_to_bitmap(tda_info->startSymbolIndex, tda_info->nrOfSymbols);
}
return pdsch;
}
@@ -474,12 +482,8 @@ void schedule_nr_sib1(module_id_t module_idP,
// TODO: Get these values from RRC
const int CC_id = 0;
uint8_t candidate_idx = 0;
gNB_MAC_INST *gNB_mac = RC.nrmac[module_idP];
NR_ServingCellConfigCommon_t *scc = gNB_mac->common_channels[CC_id].ServingCellConfigCommon;
int time_domain_allocation = gNB_mac->radio_config.sib1_tda;
int L_max;
switch (scc->ssb_PositionsInBurst->present) {
case 1:
@@ -492,8 +496,7 @@ void schedule_nr_sib1(module_id_t module_idP,
L_max = 64;
break;
default:
AssertFatal(0,"SSB bitmap size value %d undefined (allowed values 1,2,3)\n",
scc->ssb_PositionsInBurst->present);
AssertFatal(false, "SSB bitmap size value %d undefined (allowed values 1,2,3)\n", scc->ssb_PositionsInBurst->present);
}
for (int i = 0; i < L_max; i++) {
@@ -512,38 +515,51 @@ void schedule_nr_sib1(module_id_t module_idP,
int beam_index = get_beam_from_ssbidx(gNB_mac, i);
NR_beam_alloc_t beam = beam_allocation_procedure(&gNB_mac->beam_info, frameP, slotP, beam_index, n_slots_frame);
AssertFatal(beam.idx >= 0, "Cannot allocate SIB1 corresponding to SSB %d in any available beam\n", i);
NR_COMMON_channels_t *cc = &gNB_mac->common_channels[0];
LOG_D(NR_MAC,"(%d.%d) SIB1 transmission: ssb_index %d\n", frameP, slotP, type0_PDCCH_CSS_config->ssb_index);
default_table_type_t table_type = get_default_table_type(type0_PDCCH_CSS_config->type0_pdcch_ss_mux_pattern);
// assuming normal CP
NR_tda_info_t tda_info = get_info_from_tda_tables(table_type, time_domain_allocation, scc->dmrs_TypeA_Position, true);
AssertFatal((tda_info.startSymbolIndex + tda_info.nrOfSymbols) < 14,
"SIB1 TDA %d would cause overlap with CSI-RS. Please select a different SIB1 TDA.\n",
time_domain_allocation);
NR_pdsch_dmrs_t dmrs_parms = get_dl_dmrs_params(scc, NULL, &tda_info, 1);
NR_sched_pdcch_t sched_pdcch = set_pdcch_structure(NULL,
gNB_mac->sched_ctrlCommon->search_space,
gNB_mac->sched_ctrlCommon->coreset,
scc,
NULL,
type0_PDCCH_CSS_config);
int time_domain_allocation = -1;
NR_sched_pdsch_t sched_pdsch = {0};
for (int t = 0; t < 16; t++) {
// If the PDSCH was scheduled with SI-RNTI in PDCCH Type0 common search space,
// the UE may assume that this PDSCH resource allocation is not applied (Table 5.1.2.1.1-4 and 5 in 38.214)
int row = t + 1;
if (table_type == defaultB && (row == 12 || row == 13 || row == 14))
continue;
if (table_type == defaultC && (row == 1 || row == 6 || row == 7 ||row > 12))
continue;
// assuming normal CP
NR_tda_info_t tda_info = get_info_from_tda_tables(table_type, t, scc->dmrs_TypeA_Position, true);
// SIB1 TDA going to the last symbol would cause overlap with CSI-RS
if (!tda_info.valid_tda || tda_info.startSymbolIndex + tda_info.nrOfSymbols == 14)
continue;
if (tda_info.startSymbolIndex < type0_PDCCH_CSS_config->first_symbol_index + type0_PDCCH_CSS_config->num_symbols)
continue;
NR_COMMON_channels_t *cc = &gNB_mac->common_channels[0];
// Configure sched_ctrlCommon for SIB1
NR_sched_pdsch_t sched_pdsch = schedule_control_sib1(gNB_mac,
CC_id,
&sched_pdcch,
type0_PDCCH_CSS_config,
time_domain_allocation,
&dmrs_parms,
&tda_info,
candidate_idx,
beam.idx,
cc->sib1_bcch_length);
NR_pdsch_dmrs_t dmrs_parms = get_dl_dmrs_params(scc, NULL, &tda_info, 1);
// Configure sched_ctrlCommon for SIB1
sched_pdsch = schedule_control_sib1(gNB_mac,
CC_id,
&sched_pdcch,
type0_PDCCH_CSS_config,
t,
&dmrs_parms,
&tda_info,
candidate_idx,
beam.idx,
cc->sib1_bcch_length);
if (sched_pdsch.tb_size > 0) {
time_domain_allocation = t;
break;
}
}
AssertFatal(time_domain_allocation > 0, "Couldn't select any TDA for SIB1\n");
nfapi_nr_dl_tti_request_body_t *dl_req = &DL_req->dl_tti_request_body;
int pdu_index = gNB_mac->pdu_index[0]++;
nr_fill_nfapi_dl_SIB_pdu(gNB_mac,
@@ -673,7 +689,8 @@ static void other_sib_sched_control(module_id_t module_idP,
uint16_t *vrb_map = cc->vrb_map[beam.idx];
uint8_t *sib_bcch_pdu = cc->other_sib_bcch_pdu[payload_idx];
int num_total_bytes = cc->other_sib_bcch_length[payload_idx];
update_rb_mcs_tbs(&sched_pdsch_otherSI, num_total_bytes, vrb_map);
bool success = update_rb_mcs_tbs(&sched_pdsch_otherSI, num_total_bytes, vrb_map);
AssertFatal(success, "Couldn't allocate TBS for other SIB\n");
for (int rb = 0; rb < sched_pdsch_otherSI.rbSize; rb++) {
vrb_map[rb + type0_PDCCH_CSS_config->cset_start_rb] |= SL_to_bitmap(tda_info.startSymbolIndex, tda_info.nrOfSymbols);
openair2/LAYER2/NR_MAC_gNB/nr_mac_gNB.h
-1
View File
@@ -186,7 +186,6 @@ typedef enum {
} nr_config_report_type_t;
typedef struct nr_mac_config_t {
int sib1_tda;
nr_pdsch_AntennaPorts_t pdsch_AntennaPorts;
int pusch_AntennaPorts;
int minRXTXTIME;