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Commit 8f747d7a authored by Robert Schmidt's avatar Robert Schmidt
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Simplify nr_initiate_ra_proc() 

- create function to find free RA process
- reorganize function to put Msg1 related processing first, Msg2 second
parent 6658eb28
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Showing with 107 additions and 127 deletions
openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_RA.c
View file @ 8f747d7a
......@@ -540,6 +540,40 @@ static void nr_schedule_msg2(uint16_t rach_frame,
*msg2_frame = *msg2_frame % 1024;
}
static bool ra_contains_preamble(const NR_RA_t *ra, uint16_t preamble_index)
{
for (int j = 0; j < ra->preambles.num_preambles; j++) {
// check if the preamble received correspond to one of the listed or configured preambles
if (preamble_index == ra->preambles.preamble_list[j]) {
if (ra->rnti == 0 && get_softmodem_params()->nsa)
continue;
return true;
}
}
return false;
}
static NR_RA_t *find_free_nr_RA(NR_RA_t *ra_base, int ra_count, uint16_t preamble_index)
{
// for posteriority: in the past we checked the beam index, but only in CFRA
//if (ra->cfra && preamble_index != ra->preamble.preamble_list[beam_index]])
// // then is not right RA
//
// that seems strange because:
// - we check preamble_index already
// - why only CFRA?
for (int i = 0; i < ra_count; ++i) {
NR_RA_t *ra = &ra_base[i];
if (ra->ra_state != nrRA_gNB_IDLE)
continue;
if (!ra_contains_preamble(ra, preamble_index))
continue;
return ra;
}
return NULL;
}
void nr_initiate_ra_proc(module_id_t module_idP,
int CC_id,
......@@ -550,147 +584,93 @@ void nr_initiate_ra_proc(module_id_t module_idP,
uint8_t symbol,
int16_t timing_offset)
{
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_INITIATE_RA_PROC, 1);
gNB_MAC_INST *nr_mac = RC.nrmac[module_idP];
NR_SCHED_LOCK(&nr_mac->sched_lock);
uint8_t ul_carrier_id = 0; // 0 for NUL 1 for SUL
uint16_t msg2_frame, msg2_slot,monitoring_slot_period,monitoring_offset;
NR_COMMON_channels_t *cc = &nr_mac->common_channels[CC_id];
NR_ServingCellConfigCommon_t *scc = cc->ServingCellConfigCommon;
frame_type_t frame_type = cc->frame_type;
uint8_t total_RApreambles = MAX_NUM_NR_PRACH_PREAMBLES;
uint8_t num_ssb_per_RO = scc->uplinkConfigCommon->initialUplinkBWP->rach_ConfigCommon->choice.setup->ssb_perRACH_OccasionAndCB_PreamblesPerSSB->present;
int pr_found;
if( scc->uplinkConfigCommon->initialUplinkBWP->rach_ConfigCommon->choice.setup->totalNumberOfRA_Preambles != NULL)
total_RApreambles = *scc->uplinkConfigCommon->initialUplinkBWP->rach_ConfigCommon->choice.setup->totalNumberOfRA_Preambles;
if(num_ssb_per_RO > 3) { /*num of ssb per RO >= 1*/
num_ssb_per_RO -= 3;
total_RApreambles = total_RApreambles/num_ssb_per_RO ;
NR_RA_t *ra = find_free_nr_RA(cc->ra, sizeofArray(cc->ra), preamble_index);
if (ra == NULL) {
LOG_E(NR_MAC, "FAILURE: %4d.%2d initiating RA procedure for preamble index %d: no free RA process\n", frameP, slotP, preamble_index);
NR_SCHED_UNLOCK(&nr_mac->sched_lock);
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_INITIATE_RA_PROC, 0);
return;
}
for (int i = 0; i < NR_NB_RA_PROC_MAX; i++) {
NR_RA_t *ra = &cc->ra[i];
if (ra->ra_state != nrRA_gNB_IDLE)
continue;
pr_found = 0;
for(int j = 0; j < ra->preambles.num_preambles; j++) {
//check if the preamble received correspond to one of the listed or configured preambles
if (preamble_index == ra->preambles.preamble_list[j]) {
if (ra->rnti == 0 && get_softmodem_params()->nsa)
continue;
pr_found=1;
break;
}
}
if (pr_found == 0) {
continue;
}
rnti_t ra_rnti = nr_get_ra_rnti(symbol, slotP, freq_index, ul_carrier_id);
// Configure RA BWP
configure_UE_BWP(nr_mac, scc, NULL, ra, NULL, -1, -1);
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_INITIATE_RA_PROC, 1);
LOG_D(NR_MAC,
"[gNB %d][RAPROC] CC_id %d Frame %d, Slot %d Initiating RA procedure for preamble index %d\n",
module_idP,
CC_id,
frameP,
slotP,
preamble_index);
uint8_t beam_index = ssb_index_from_prach(module_idP, frameP, slotP, preamble_index, freq_index, symbol);
// the UE sent a RACH either for starting RA procedure or RA procedure failed and UE retries
if (ra->cfra) {
// if the preamble received correspond to one of the listed
if (!(preamble_index == ra->preambles.preamble_list[beam_index])) {
LOG_E(
NR_MAC,
"[gNB %d][RAPROC] FAILURE: preamble %d does not correspond to any of the ones in rach_ConfigDedicated\n",
module_idP,
preamble_index);
continue; // if the PRACH preamble does not correspond to any of the ones sent through RRC abort RA proc
}
}
LOG_D(NR_MAC, "Frame %d, Slot %d: Activating RA process \n", frameP, slotP);
ra->timing_offset = timing_offset;
ra->preamble_slot = slotP;
// retrieving ra pdcch monitoring period and offset
find_monitoring_periodicity_offset_common(ra->ra_ss, &monitoring_slot_period, &monitoring_offset);
nr_schedule_msg2(frameP,
slotP,
&msg2_frame,
&msg2_slot,
ra->DL_BWP.scs,
scc,
frame_type,
monitoring_slot_period,
monitoring_offset,
beam_index,
cc->num_active_ssb,
nr_mac->tdd_beam_association,
nr_mac->if_inst->sl_ahead);
ra->Msg2_frame = msg2_frame;
ra->Msg2_slot = msg2_slot;
LOG_D(NR_MAC, "%s() Msg2[%04d%d] SFN/SF:%04d%d\n", __FUNCTION__, ra->Msg2_frame, ra->Msg2_slot, frameP, slotP);
if (ra->rnti == 0) { // This condition allows for the usage of a preconfigured rnti for the CFRA
int loop = 0;
bool exist_connected_ue, exist_in_pending_ra_ue;
if (ra->rnti == 0) { // This condition allows for the usage of a preconfigured rnti for the CFRA
rnti_t trial = 0;
do {
// 3GPP TS 38.321 version 15.13.0 Section 7.1 Table 7.1-1: RNTI values
while (trial < 1 || trial > 0xffef)
trial = (taus() % 0xffef) + 1;
exist_connected_ue = find_nr_UE(&nr_mac->UE_info, trial) != NULL;
exist_in_pending_ra_ue = find_nr_RA_id(module_idP, CC_id, trial) != -1;
loop++;
} while (loop < 100 && (exist_connected_ue || exist_in_pending_ra_ue) );
if (loop == 100) {
LOG_E(NR_MAC, "[RAPROC] initialisation random access: no more available RNTIs for new UE\n");
NR_SCHED_UNLOCK(&nr_mac->sched_lock);
return;
}
ra->rnti = trial;
rnti_t trial = 0;
do {
// 3GPP TS 38.321 version 15.13.0 Section 7.1 Table 7.1-1: RNTI values
while (trial < 1 || trial > 0xffef)
trial = (taus() % 0xffef) + 1;
exist_connected_ue = find_nr_UE(&nr_mac->UE_info, trial) != NULL;
exist_in_pending_ra_ue = find_nr_RA_id(module_idP, CC_id, trial) != -1;
loop++;
} while (loop < 100 && (exist_connected_ue || exist_in_pending_ra_ue) );
if (loop == 100) {
LOG_E(NR_MAC, "[RAPROC] initialisation random access: no more available RNTIs for new UE\n");
NR_SCHED_UNLOCK(&nr_mac->sched_lock);
return;
}
ra->rnti = trial;
}
ra->ra_state = nrRA_Msg2;
ra->RA_rnti = ra_rnti;
ra->preamble_index = preamble_index;
ra->beam_id = cc->ssb_index[beam_index];
LOG_I(NR_MAC,
"[gNB %d][RAPROC] CC_id %d Frame %d Activating Msg2 generation in frame %d, slot %d using RA rnti %x SSB, new rnti %04x "
"index %u RA index %d\n",
module_idP,
CC_id,
frameP,
ra->Msg2_frame,
ra->Msg2_slot,
ra->RA_rnti,
ra->rnti,
cc->ssb_index[beam_index],
i);
ra->ra_state = nrRA_Msg2;
ra->preamble_slot = slotP;
ra->preamble_index = preamble_index;
ra->timing_offset = timing_offset;
uint8_t ul_carrier_id = 0; // 0 for NUL 1 for SUL
ra->RA_rnti = nr_get_ra_rnti(symbol, slotP, freq_index, ul_carrier_id);
int index = ra - cc->ra;
LOG_I(NR_MAC, "%d.%d UE RA-RNTI %04x RNTI %04x: Activating RA process index %d\n", frameP, slotP, ra->RA_rnti, ra->rnti, index);
NR_SCHED_UNLOCK(&nr_mac->sched_lock);
return;
}
// Configure RA BWP
NR_ServingCellConfigCommon_t *scc = cc->ServingCellConfigCommon;
configure_UE_BWP(nr_mac, scc, NULL, ra, NULL, -1, -1);
// retrieving ra pdcch monitoring period and offset
uint16_t monitoring_slot_period, monitoring_offset;
find_monitoring_periodicity_offset_common(ra->ra_ss, &monitoring_slot_period, &monitoring_offset);
uint8_t beam_index = ssb_index_from_prach(module_idP, frameP, slotP, preamble_index, freq_index, symbol);
ra->beam_id = cc->ssb_index[beam_index];
uint16_t msg2_frame, msg2_slot;
nr_schedule_msg2(frameP,
slotP,
&msg2_frame,
&msg2_slot,
ra->DL_BWP.scs,
scc,
cc->frame_type,
monitoring_slot_period,
monitoring_offset,
beam_index,
cc->num_active_ssb,
nr_mac->tdd_beam_association,
nr_mac->if_inst->sl_ahead);
ra->Msg2_frame = msg2_frame;
ra->Msg2_slot = msg2_slot;
LOG_D(NR_MAC, "%s() Msg2[%04d%d] SFN/SF:%04d%d\n", __FUNCTION__, ra->Msg2_frame, ra->Msg2_slot, frameP, slotP);
LOG_I(NR_MAC,
"[gNB %d][RAPROC] CC_id %d Frame %d Activating Msg2 generation in frame %d, slot %d using RA rnti %x SSB, new rnti %04x "
"index %u\n",
module_idP,
CC_id,
frameP,
ra->Msg2_frame,
ra->Msg2_slot,
ra->RA_rnti,
ra->rnti,
cc->ssb_index[beam_index]);
NR_SCHED_UNLOCK(&nr_mac->sched_lock);
LOG_E(NR_MAC, "[gNB %d][RAPROC] FAILURE: CC_id %d %4d.%2d initiating RA procedure for preamble index %d: no free RA process\n", module_idP, CC_id, frameP, slotP, preamble_index);
VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_INITIATE_RA_PROC, 0);
}
......
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