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fix(NR_UE): gate half-frame PBCH mirror on caller-provided ssb_period #220

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Merged
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Jul 4, 2026
+9 −5
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fix(NR_UE): gate half-frame PBCH mirror on caller-provided ssb_period #220

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14 changes: 9 additions & 5 deletions openair1/SCHED_NR_UE/phy_procedures_nr_ue.c
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Original file line number Diff line number Diff line change
Expand Up @@ -886,18 +886,22 @@ void pdcch_processing(PHY_VARS_NR_UE *ue, const UE_nr_rxtx_proc_t *proc, nr_phy_
memcpy(ue->phy_sim_rxdataF, rxdataF[0], sizeof(int32_t) * max_nb_symb_pdcch * fp->ofdm_symbol_size);
}

int is_ssb_in_symbol(const PHY_VARS_NR_UE *ue, const int symbIdxInFrame, const int slot, const int ssbMask, const int ssbIndex)
int is_ssb_in_symbol(const PHY_VARS_NR_UE *ue,
const int symbIdxInFrame,
const int slot,
const int ssbMask,
const int ssbIndex,
const int ssb_period)
{
const NR_DL_FRAME_PARMS *fp = &ue->frame_parms;
const fapi_nr_config_request_t *cfg = &ue->nrUE_config;
// Skip if current SSB index is not transmitted
if (!is_ssb_index_transmitted(ue, ssbIndex)) {
return false;
}

const int startPbchSymb = nr_get_ssb_start_symbol(fp, ssbIndex) + 1;
const int startPbchSymbHf = (cfg->ssb_table.ssb_period == 0) ? (startPbchSymb + (fp->slots_per_frame * NR_SYMBOLS_PER_SLOT / 2))
: (fp->slots_per_frame * NR_SYMBOLS_PER_SLOT);
const int startPbchSymbHf = (ssb_period == 0) ? (startPbchSymb + (fp->slots_per_frame * NR_SYMBOLS_PER_SLOT / 2))
: (fp->slots_per_frame * NR_SYMBOLS_PER_SLOT);

// Skip if no SSB in current symbol
if ((symbIdxInFrame >= startPbchSymb && symbIdxInFrame < (startPbchSymb + NB_SYMBOLS_PBCH))
Expand All @@ -922,7 +926,7 @@ int get_ssb_index_in_symbol(const PHY_VARS_NR_UE *ue, const int symbIdxInFrame,
// Find the SSB index corresponding to current symbol
for (int ssbIndex = 0; ssbIndex < fp->Lmax; ssbIndex++) {
const int ssbMask = cfg->ssb_table.ssb_mask_list[ssbIndex / 32].ssb_mask;
if (is_ssb_in_symbol(ue, symbIdxInFrame, slot, ssbMask, ssbIndex))
if (is_ssb_in_symbol(ue, symbIdxInFrame, slot, ssbMask, ssbIndex, ssb_period))
return ssbIndex;
}

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