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Merge remote-tracking branch 'origin/NTN_Koffset_updated' into integration_2025_w13 (!3343)

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K-offset updated with configured sub carrier spacing

According to 38.331 , cell specific K-OFFSET provided in SIB19 is provided in
number of slots as per 15Khz SCS Koffset before being applied, needs to be
updated to the slots according to the configured subcarrier spacing.
This commit is contained in:
Jaroslava Fiedlerova
2025-03-31 15:25:41 +02:00
parent b822dcda22 b141faaf30
commit 0c5e7b439c
5 changed files with 44 additions and 30 deletions
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executables/nr-ue.c
+14 -10
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@@ -872,18 +872,22 @@ static inline void apply_ntn_config(PHY_VARS_NR_UE *UE,
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;
double total_ta_ms = UE->ntn_config_message->ntn_config_params.ntn_total_time_advance_ms;
UE->timing_advance = fp->samples_per_subframe * total_ta_ms;
int mu = fp->numerology_index;
int koffset = UE->ntn_config_message->ntn_config_params.cell_specific_k_offset;
if (*ntn_koffset != koffset) {
*duration_rx_to_tx = NR_UE_CAPABILITY_SLOT_RX_TO_TX + (koffset << mu);
*timing_advance += fp->get_samples_slot_timestamp(slot_nr, fp, (koffset - *ntn_koffset) << mu);
*ntn_koffset = koffset;
}
LOG_I(PHY,
"cell_specific_k_offset = %d ms, ntn_total_time_advance_ms = %f ms (%d samples)\n",
"k_offset = %d ms (%d slots), ntn_total_time_advance_ms = %f ms (%d samples)\n",
*ntn_koffset,
UE->ntn_config_message->ntn_config_params.ntn_total_time_advance_ms,
*ntn_koffset << mu,
total_ta_ms,
UE->timing_advance);
}
}
@@ -1080,7 +1084,7 @@ void *UE_thread(void *arg)
if (UE->ntn_config_message->update) {
UE->ntn_config_message->update = false;
update_ntn_system_information = true;
nr_slot_tx_offset = UE->ntn_config_message->ntn_config_params.cell_specific_k_offset;
nr_slot_tx_offset = UE->ntn_config_message->ntn_config_params.cell_specific_k_offset << fp->numerology_index;
}
int slot_nr = absolute_slot % nb_slot_frame;