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NR UE: fix application of NTN TA information

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This commit is contained in:
Thomas Schlichter
2025-02-14 17:03:48 +00:00
parent 6b8a59cb68
commit e7122ad789
2 changed files with 30 additions and 14 deletions
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executables/nr-ue.c
+29 -14
View File
@@ -814,6 +814,33 @@ static inline int get_readBlockSize(uint16_t slot, NR_DL_FRAME_PARMS *fp) {
return rem_samples + next_slot_first_symbol;
}
static inline void apply_ntn_config(PHY_VARS_NR_UE *UE,
NR_DL_FRAME_PARMS *fp,
int slot_nr,
bool *update_ntn_system_information,
int *duration_rx_to_tx,
int *timing_advance,
int *ntn_koffset)
{
if (*update_ntn_system_information) {
*update_ntn_system_information = false;
*duration_rx_to_tx = NR_UE_CAPABILITY_SLOT_RX_TO_TX + UE->ntn_config_message->ntn_config_params.cell_specific_k_offset;
UE->timing_advance = fp->samples_per_subframe * UE->ntn_config_message->ntn_config_params.ntn_total_time_advance_ms;
*timing_advance +=
fp->get_samples_slot_timestamp(slot_nr,
fp,
UE->ntn_config_message->ntn_config_params.cell_specific_k_offset - *ntn_koffset);
*ntn_koffset = UE->ntn_config_message->ntn_config_params.cell_specific_k_offset;
LOG_I(PHY,
"cell_specific_k_offset = %d ms, ntn_total_time_advance_ms = %f ms (%d samples)\n",
*ntn_koffset,
UE->ntn_config_message->ntn_config_params.ntn_total_time_advance_ms,
UE->timing_advance);
}
}
void *UE_thread(void *arg)
{
//this thread should be over the processing thread to keep in real time
@@ -869,7 +896,6 @@ void *UE_thread(void *arg)
readFrame(UE, &tmp, true);
}
double ntn_ta_common = 0;
int ntn_koffset = 0;
int duration_rx_to_tx = NR_UE_CAPABILITY_SLOT_RX_TO_TX;
@@ -1000,16 +1026,6 @@ void *UE_thread(void *arg)
absolute_slot++;
TracyCFrameMark;
if (update_ntn_system_information) {
update_ntn_system_information = false;
int ta_offset = UE->frame_parms.samples_per_subframe * (UE->ntn_config_message->ntn_config_params.ntn_total_time_advance_ms - ntn_ta_common);
UE->timing_advance += ta_offset;
ntn_ta_common = UE->ntn_config_message->ntn_config_params.ntn_total_time_advance_ms;
ntn_koffset = UE->ntn_config_message->ntn_config_params.cell_specific_k_offset;
timing_advance = ntn_koffset * (UE->frame_parms.samples_per_subframe >> mac->current_UL_BWP->scs);
}
if (UE->ntn_config_message->update) {
UE->ntn_config_message->update = false;
update_ntn_system_information = true;
@@ -1129,10 +1145,9 @@ void *UE_thread(void *arg)
newTx);
stream_status = STREAM_STATUS_SYNCED;
tx_wait_for_dlsch[slot] = 0;
// apply new duration next run to avoid thread dead lock
if (update_ntn_system_information) {
duration_rx_to_tx = NR_UE_CAPABILITY_SLOT_RX_TO_TX + UE->ntn_config_message->ntn_config_params.cell_specific_k_offset;
}
apply_ntn_config(UE, fp, slot_nr, &update_ntn_system_information, &duration_rx_to_tx, &timing_advance, &ntn_koffset);
}
return NULL;
openair2/LAYER2/NR_MAC_UE/nr_ue_scheduler.c
+1
View File
@@ -3617,6 +3617,7 @@ static void schedule_ntn_config_command(fapi_nr_dl_config_request_t *dl_config,
{
fapi_nr_dl_ntn_config_command_pdu *ntn_config_command_pdu = &dl_config->dl_config_list[dl_config->number_pdus].ntn_config_command_pdu;
ntn_config_command_pdu->cell_specific_k_offset = mac->ntn_ta.cell_specific_k_offset;
ntn_config_command_pdu->ntn_ta_commondrift = mac->ntn_ta.ntn_ta_commondrift;
ntn_config_command_pdu->N_common_ta_adj = mac->ntn_ta.N_common_ta_adj;
ntn_config_command_pdu->N_UE_TA_adj = mac->ntn_ta.N_UE_TA_adj;
ntn_config_command_pdu->ntn_total_time_advance_ms = (mac->ntn_ta.N_common_ta_adj + mac->ntn_ta.N_UE_TA_adj) * 2;