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Commit 072830bf authored by Robert Schmidt's avatar Robert Schmidt
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Reformat schedule_nr_prach()

parent 39de3687
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Showing with 68 additions and 57 deletions
openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_RA.c
View file @ 072830bf
......@@ -195,15 +195,17 @@ void find_SSB_and_RO_available(module_id_t module_idP) {
}
void schedule_nr_prach(module_id_t module_idP, frame_t frameP, sub_frame_t slotP) {
void schedule_nr_prach(module_id_t module_idP, frame_t frameP, sub_frame_t slotP)
{
gNB_MAC_INST *gNB = RC.nrmac[module_idP];
NR_COMMON_channels_t *cc = gNB->common_channels;
NR_ServingCellConfigCommon_t *scc = cc->ServingCellConfigCommon;
nfapi_nr_ul_tti_request_t *UL_tti_req = &RC.nrmac[module_idP]->UL_tti_req_ahead[0][slotP];
nfapi_nr_config_request_scf_t *cfg = &RC.nrmac[module_idP]->config[0];
if (is_nr_UL_slot(scc,slotP)) {
if (!is_nr_UL_slot(scc,slotP))
return;
uint8_t config_index = scc->uplinkConfigCommon->initialUplinkBWP->rach_ConfigCommon->choice.setup->rach_ConfigGeneric.prach_ConfigurationIndex;
uint8_t mu,N_dur,N_t_slot,start_symbol = 0,N_RA_slot;
uint16_t RA_sfn_index = -1;
......@@ -219,7 +221,7 @@ void schedule_nr_prach(module_id_t module_idP, frame_t frameP, sub_frame_t slotP
uint8_t fdm = cfg->prach_config.num_prach_fd_occasions.value;
// prach is scheduled according to configuration index and tables 6.3.3.2.2 to 6.3.3.2.4
if ( get_nr_prach_info_from_index(config_index,
if (!get_nr_prach_info_from_index(config_index,
(int)frameP,
(int)slotP,
scc->downlinkConfigCommon->frequencyInfoDL->absoluteFrequencyPointA,
......@@ -231,58 +233,68 @@ void schedule_nr_prach(module_id_t module_idP, frame_t frameP, sub_frame_t slotP
&N_dur,
&RA_sfn_index,
&N_RA_slot,
&config_period) ) {
uint16_t format0 = format&0xff; // first column of format from table
uint16_t format1 = (format>>8)&0xff; // second column of format from table
if (N_RA_slot > 1) { //more than 1 PRACH slot in a subframe
if (slotP%2 == 1){
slot_index = 1;
}
else {
slot_index = 0;
}
}else if (N_RA_slot <= 1) { //1 PRACH slot in a subframe
slot_index = 0;
}
&config_period) )
return;
AssertFatal(UL_tti_req->SFN == frameP && UL_tti_req->Slot == slotP,
"%d.%d UL_tti_req frame.slot %d.%d does not match PRACH %d.%d\n",
frameP, slotP,
UL_tti_req->SFN,
UL_tti_req->Slot,
frameP, slotP);
for (int fdm_index=0; fdm_index < fdm; fdm_index++) { // one structure per frequency domain occasion
for (int td_index=0; td_index<N_t_slot; td_index++) {
uint16_t format0 = format&0xff; // first column of format from table
uint16_t format1 = (format>>8)&0xff; // second column of format from table
prach_occasion_id = (((frameP % (cc->max_association_period * config_period))/config_period) * cc->total_prach_occasions_per_config_period) + (RA_sfn_index + slot_index) * N_t_slot * fdm + td_index * fdm + fdm_index;
if((prach_occasion_id < cc->total_prach_occasions) && (td_index == 0)){
if (N_RA_slot > 1) { // more than 1 PRACH slot in a subframe
slot_index = slotP % 2 == 1;
} else if (N_RA_slot <= 1) { // 1 PRACH slot in a subframe
slot_index = 0;
}
UL_tti_req->pdus_list[UL_tti_req->n_pdus].pdu_type = NFAPI_NR_UL_CONFIG_PRACH_PDU_TYPE;
UL_tti_req->pdus_list[UL_tti_req->n_pdus].pdu_size = sizeof(nfapi_nr_prach_pdu_t);
nfapi_nr_prach_pdu_t *prach_pdu = &UL_tti_req->pdus_list[UL_tti_req->n_pdus].prach_pdu;
memset(prach_pdu,0,sizeof(nfapi_nr_prach_pdu_t));
UL_tti_req->n_pdus+=1;
AssertFatal(UL_tti_req->SFN == frameP && UL_tti_req->Slot == slotP,
"%d.%d UL_tti_req frame.slot %d.%d does not match PRACH %d.%d\n",
frameP, slotP,
UL_tti_req->SFN,
UL_tti_req->Slot,
frameP, slotP);
for (int fdm_index=0; fdm_index < fdm; fdm_index++) { // one structure per frequency domain occasion
for (int td_index = 0; td_index < N_t_slot; td_index++) {
prach_occasion_id = (((frameP % (cc->max_association_period * config_period)) / config_period)
* cc->total_prach_occasions_per_config_period)
+ (RA_sfn_index + slot_index) * N_t_slot * fdm + td_index * fdm + fdm_index;
if (!((prach_occasion_id < cc->total_prach_occasions) && (td_index == 0)))
continue;
UL_tti_req->pdus_list[UL_tti_req->n_pdus].pdu_type =
NFAPI_NR_UL_CONFIG_PRACH_PDU_TYPE;
UL_tti_req->pdus_list[UL_tti_req->n_pdus].pdu_size =
sizeof(nfapi_nr_prach_pdu_t);
nfapi_nr_prach_pdu_t *prach_pdu =
&UL_tti_req->pdus_list[UL_tti_req->n_pdus].prach_pdu;
memset(prach_pdu, 0, sizeof(nfapi_nr_prach_pdu_t));
UL_tti_req->n_pdus += 1;
// filling the prach fapi structure
prach_pdu->phys_cell_id = *scc->physCellId;
prach_pdu->num_prach_ocas = N_t_slot;
prach_pdu->prach_start_symbol = start_symbol;
prach_pdu->num_ra = fdm_index;
prach_pdu->num_cs = get_NCS(scc->uplinkConfigCommon->initialUplinkBWP->rach_ConfigCommon->choice.setup->rach_ConfigGeneric.zeroCorrelationZoneConfig,
format0,
scc->uplinkConfigCommon->initialUplinkBWP->rach_ConfigCommon->choice.setup->restrictedSetConfig);
LOG_D(MAC, "Frame %d, Slot %d: Prach Occasion id = %u fdm index = %u start symbol = %u slot index = %u subframe index = %u \n",
frameP, slotP,
prach_occasion_id, prach_pdu->num_ra,
prach_pdu->prach_start_symbol,
slot_index, RA_sfn_index);
prach_pdu->num_cs = get_NCS(
scc->uplinkConfigCommon->initialUplinkBWP->rach_ConfigCommon->choice
.setup->rach_ConfigGeneric.zeroCorrelationZoneConfig,
format0,
scc->uplinkConfigCommon->initialUplinkBWP->rach_ConfigCommon->choice
.setup->restrictedSetConfig);
LOG_D(MAC,
"Frame %d, Slot %d: Prach Occasion id = %u fdm index = %u start "
"symbol = %u slot index = %u subframe index = %u \n",
frameP,
slotP,
prach_occasion_id,
prach_pdu->num_ra,
prach_pdu->prach_start_symbol,
slot_index,
RA_sfn_index);
// SCF PRACH PDU format field does not consider A1/B1 etc. possibilities
// We added 9 = A1/B1 10 = A2/B2 11 A3/B3
if (format1!=0xff) {
switch(format0) {
if (format1 != 0xff) {
switch (format0) {
case 0xa1:
prach_pdu->prach_format = 11;
break;
......@@ -292,12 +304,13 @@ void schedule_nr_prach(module_id_t module_idP, frame_t frameP, sub_frame_t slotP
case 0xa3:
prach_pdu->prach_format = 13;
break;
default:
AssertFatal(1==0,"Only formats A1/B1 A2/B2 A3/B3 are valid for dual format");
default:
AssertFatal(
1 == 0,
"Only formats A1/B1 A2/B2 A3/B3 are valid for dual format");
}
}
else{
switch(format0) {
} else {
switch (format0) {
case 0:
prach_pdu->prach_format = 0;
break;
......@@ -331,10 +344,10 @@ void schedule_nr_prach(module_id_t module_idP, frame_t frameP, sub_frame_t slotP
case 0xc2:
prach_pdu->prach_format = 10;
break;
default:
AssertFatal(1==0,"Invalid PRACH format");
default:
AssertFatal(1 == 0, "Invalid PRACH format");
}
}
}
const int start_rb = cfg->prach_config.num_prach_fd_occasions_list[fdm_index].k1.value;
const int pusch_mu = scc->uplinkConfigCommon->frequencyInfoUL->scs_SpecificCarrierList.list.array[0]->subcarrierSpacing;
const int num_rb = get_N_RA_RB(cfg->prach_config.prach_sub_c_spacing.value, pusch_mu);
......@@ -343,16 +356,14 @@ void schedule_nr_prach(module_id_t module_idP, frame_t frameP, sub_frame_t slotP
const uint16_t symb_mask = ((1 << N_dur) - 1) << start_symbol;
for (int i = start_rb; i < start_rb + num_rb; ++i) {
AssertFatal((vrb_map_UL[i] & symb_mask) == 0,
"cannot reserve resources for PRACH: at RB %d, vrb_map_UL %x for symbols %x!\n",
"cannot reserve resources for PRACH: at RB %d, "
"vrb_map_UL %x for symbols %x!\n",
i,
vrb_map_UL[i],
symb_mask);
vrb_map_UL[i] |= symb_mask;
}
}
}
}
}
}
}
......
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