maki/openairinterface5g
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Add function to compute slot for RA-RNTI

Browse Source
This commit is contained in:
francescomani
2025-05-01 10:03:24 +02:00
committed by Robert Schmidt
parent a1e1405ee6
commit a337354588
1 changed files with 37 additions and 29 deletions
Download Patch File Download Diff File Expand all files Collapse all files
openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_RA.c
+37 -29
View File
@@ -681,6 +681,27 @@ static uint8_t nr_get_msg3_tpc(uint32_t preamble_power)
return 3; // it means 0dB
}
static unsigned int get_slot_RA(const NR_ServingCellConfigCommon_t *scc,
const NR_RACH_ConfigCommon_t *rach_ConfigCommon,
const NR_MsgA_ConfigCommon_r16_t *msgacc,
frame_type_t frame_type,
int slot)
{
uint8_t index = rach_ConfigCommon->rach_ConfigGeneric.prach_ConfigurationIndex;
uint16_t prach_format =
get_nr_prach_format_from_index(index, scc->downlinkConfigCommon->frequencyInfoDL->absoluteFrequencyPointA, frame_type);
unsigned int slot_RA;
if ((prach_format & 0xff) < 4) {
const int ul_mu = scc->uplinkConfigCommon->frequencyInfoUL->scs_SpecificCarrierList.list.array[0]->subcarrierSpacing;
const int mu = nr_get_prach_or_ul_mu(msgacc, rach_ConfigCommon, ul_mu);
unsigned int slots_per_sf = (1 << mu);
slot_RA = slot / slots_per_sf;
} else {
slot_RA = slot;
}
return slot_RA;
}
void nr_initiate_ra_proc(module_id_t module_idP,
int CC_id,
frame_t frameP,
@@ -723,35 +744,22 @@ void nr_initiate_ra_proc(module_id_t module_idP,
ra->msg3_TPC = nr_get_msg3_tpc(preamble_power);
NR_ServingCellConfigCommon_t *scc = cc->ServingCellConfigCommon;
{
// 3GPP TS 38.321 Section 5.1.3(a) says t_id for RA-RNTI depends on mu as specified in clause 5.3.2 in TS 38.211
// so mu = 0 for prach format < 4.
NR_RACH_ConfigCommon_t *rach_ConfigCommon = scc->uplinkConfigCommon->initialUplinkBWP->rach_ConfigCommon->choice.setup;
NR_MsgA_ConfigCommon_r16_t *msgacc = NULL;
if (scc->uplinkConfigCommon->initialUplinkBWP->ext1 && scc->uplinkConfigCommon->initialUplinkBWP->ext1->msgA_ConfigCommon_r16)
msgacc = scc->uplinkConfigCommon->initialUplinkBWP->ext1->msgA_ConfigCommon_r16->choice.setup;
const int ul_mu = scc->uplinkConfigCommon->frequencyInfoUL->scs_SpecificCarrierList.list.array[0]->subcarrierSpacing;
const int mu = nr_get_prach_or_ul_mu(msgacc, rach_ConfigCommon, ul_mu);
uint8_t index = rach_ConfigCommon->rach_ConfigGeneric.prach_ConfigurationIndex;
uint16_t prach_format =
get_nr_prach_format_from_index(index, scc->downlinkConfigCommon->frequencyInfoDL->absoluteFrequencyPointA, cc->frame_type);
unsigned int slot_RA;
if ((prach_format & 0xff) < 4) {
unsigned int slots_per_sf = (1 << mu);
slot_RA = slotP / slots_per_sf;
} else {
slot_RA = slotP;
}
uint8_t ul_carrier_id = 0; // 0 for NUL 1 for SUL
ra->RA_rnti = nr_get_ra_rnti(symbol, slot_RA, freq_index, ul_carrier_id);
if (scc->uplinkConfigCommon->initialUplinkBWP->ext1 && scc->uplinkConfigCommon->initialUplinkBWP->ext1->msgA_ConfigCommon_r16) {
ra->ra_type = RA_2_STEP;
ra->ra_state = nrRA_WAIT_MsgA_PUSCH;
ra->MsgB_rnti = nr_get_MsgB_rnti(symbol, slot_RA, freq_index, ul_carrier_id);
} else {
ra->ra_type = RA_4_STEP;
ra->ra_state = nrRA_Msg2;
}
// 3GPP TS 38.321 Section 5.1.3(a) says t_id for RA-RNTI depends on mu as specified in clause 5.3.2 in TS 38.211
// so mu = 0 for prach format < 4.
NR_RACH_ConfigCommon_t *rach_ConfigCommon = scc->uplinkConfigCommon->initialUplinkBWP->rach_ConfigCommon->choice.setup;
NR_MsgA_ConfigCommon_r16_t *msgacc = NULL;
if (scc->uplinkConfigCommon->initialUplinkBWP->ext1 && scc->uplinkConfigCommon->initialUplinkBWP->ext1->msgA_ConfigCommon_r16)
msgacc = scc->uplinkConfigCommon->initialUplinkBWP->ext1->msgA_ConfigCommon_r16->choice.setup;
uint32_t slot_RA = get_slot_RA(scc, rach_ConfigCommon, msgacc, cc->frame_type, slotP);
uint8_t ul_carrier_id = 0; // 0 for NUL 1 for SUL
ra->RA_rnti = nr_get_ra_rnti(symbol, slot_RA, freq_index, ul_carrier_id);
if (scc->uplinkConfigCommon->initialUplinkBWP->ext1 && scc->uplinkConfigCommon->initialUplinkBWP->ext1->msgA_ConfigCommon_r16) {
ra->ra_type = RA_2_STEP;
ra->ra_state = nrRA_WAIT_MsgA_PUSCH;
ra->MsgB_rnti = nr_get_MsgB_rnti(symbol, slot_RA, freq_index, ul_carrier_id);
} else {
ra->ra_type = RA_4_STEP;
ra->ra_state = nrRA_Msg2;
}
int index = ra - cc->ra;