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NR UE FAPI: provide ntn_config as part of phy_config.config_req instead of a dedicated scheduled_response dl_config PDU

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We need the ntn_config when reconfiguring the PHY layer for a new initial sync,
e.g. for calculating the DL Doppler frequency.

As a dedicated scheduled_response dl_config PDU it reaches the PHY layer too late,
as part of the phy_config.config_req it reaches the PHY layer in time with the
other configuration values.
This commit is contained in:
Thomas Schlichter
2025-12-19 16:42:47 +01:00
parent b5a025931c
commit 3dcaacb63b
12 changed files with 50 additions and 145 deletions
Download Patch File Download Diff File Expand all files Collapse all files
executables/nr-ue.c
+8 -9
View File
@@ -177,8 +177,7 @@ void init_nr_ue_vars(PHY_VARS_NR_UE *ue, uint8_t UE_id)
ue->dci_thres = 0;
ue->target_Nid_cell = -1;
ue->ntn_config_message = CALLOC(1, sizeof(*ue->ntn_config_message));
ue->ntn_config_message->update = false;
ue->nrUE_config.ntn_config.params_changed = false;
// initialize all signal buffers
init_nr_ue_signal(ue, nb_connected_gNB);
@@ -737,11 +736,11 @@ static inline int get_readBlockSize(uint16_t slot, NR_DL_FRAME_PARMS *fp) {
static void fix_ntn_epoch_hfn(PHY_VARS_NR_UE *UE, int hfn, int frame)
{
const int epoch_frame = UE->ntn_config_message->ntn_config_params.epoch_sfn;
const int epoch_frame = UE->nrUE_config.ntn_config.epoch_sfn;
const int diff1 = (frame - epoch_frame + 1024) % 1024;
const int diff2 = (epoch_frame - frame + 1024) % 1024;
int *epoch_hfn = &UE->ntn_config_message->ntn_config_params.epoch_hfn;
int *epoch_hfn = &UE->nrUE_config.ntn_config.epoch_hfn;
if (diff1 < diff2) { // epoch_frame in the past
LOG_I(PHY, "epoch is %d frames in the past\n", diff1);
if (epoch_frame <= frame)
@@ -763,7 +762,7 @@ static void fix_ntn_epoch_hfn(PHY_VARS_NR_UE *UE, int hfn, int frame)
// calculate TA and Doppler based on the NTN-Config, if abs_subframe_tx < 0 then apply only Doppler
static void apply_ntn_timing_advance_and_doppler(PHY_VARS_NR_UE *UE, const NR_DL_FRAME_PARMS *fp, int abs_subframe_tx)
{
const fapi_nr_dl_ntn_config_command_pdu *ntn_config_params = &UE->ntn_config_message->ntn_config_params;
const fapi_nr_ntn_config_t *ntn_config_params = &UE->nrUE_config.ntn_config;
// Handle terrestrial networks
if (ntn_config_params->cell_specific_k_offset == 0) {
@@ -860,10 +859,10 @@ static void apply_ntn_config(PHY_VARS_NR_UE *UE,
int *timing_advance,
int *ntn_koffset)
{
if (UE->ntn_config_message->update) {
UE->ntn_config_message->update = false;
if (UE->nrUE_config.ntn_config.params_changed) {
UE->nrUE_config.ntn_config.params_changed = false;
const fapi_nr_dl_ntn_config_command_pdu *ntn_config_params = &UE->ntn_config_message->ntn_config_params;
const fapi_nr_ntn_config_t *ntn_config_params = &UE->nrUE_config.ntn_config;
const int mu = fp->numerology_index;
const int koffset = ntn_config_params->cell_specific_k_offset;
@@ -1058,7 +1057,7 @@ void *UE_thread(void *arg)
const int frame_rx = (absolute_slot / nb_slot_frame) % 1024;
const int hfn_rx = (absolute_slot / nb_slot_frame) / 1024;
fix_ntn_epoch_hfn(UE, hfn_rx, frame_rx);
if (UE->ntn_config_message->update) {
if (UE->nrUE_config.ntn_config.params_changed) {
apply_ntn_config(UE, fp, hfn_rx, frame_rx, 0, &duration_rx_to_tx, &timing_advance, &ntn_koffset);
} else {
const int mu = fp->numerology_index;