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fix CORESET start PRB according to standard at OAI gNB

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This commit is contained in:
francescomani
2025-12-22 17:31:26 +01:00
parent 74690ceb1d
commit 2a3a27a48f
3 changed files with 11 additions and 5 deletions
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openair1/PHY/NR_TRANSPORT/nr_dci.c
+8 -4
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@@ -61,9 +61,13 @@ void nr_generate_dci(PHY_VARS_gNB *gNB,
int reg_list[MAX_DCI_CORESET][NR_MAX_PDCCH_AGG_LEVEL * NR_NB_REG_PER_CCE];
nr_fill_reg_list(reg_list, pdcch_pdu_rel15);
// compute rb_offset and n_prb based on frequency allocation
int rb_offset;
int n_rb;
get_coreset_rballoc(pdcch_pdu_rel15->FreqDomainResource,&n_rb,&rb_offset);
int n_rb, cset_start;
get_coreset_rballoc(pdcch_pdu_rel15->FreqDomainResource, &n_rb, &cset_start);
int additional_offset = 0;
// first common RB of the first group of 6 PRBs has common RB index equal to 6 * ⌈BWP_start / 6⌉
if (pdcch_pdu_rel15->CoreSetType == 1)
additional_offset = (pdcch_pdu_rel15->BWPStart + 5) / 6 * 6 - pdcch_pdu_rel15->BWPStart;
int rb_offset = cset_start + additional_offset;
uint16_t cset_start_sc = frame_parms->first_carrier_offset + (pdcch_pdu_rel15->BWPStart + rb_offset) * NR_NB_SC_PER_RB;
int idx1 = pdcch_pdu_rel15->StartSymbolIndex+pdcch_pdu_rel15->DurationSymbols;
int idx2 = (((n_rb + rb_offset + pdcch_pdu_rel15->BWPStart) * 3) + 15) & ~15;
@@ -194,7 +198,7 @@ void nr_generate_dci(PHY_VARS_gNB *gNB,
// dmrs index depends on reference point for k according to 38.211 7.4.1.3.2
int dmrs_idx;
if (pdcch_pdu_rel15->CoreSetType == NFAPI_NR_CSET_CONFIG_PDCCH_CONFIG)
dmrs_idx = (reg_list[d][reg_count] + pdcch_pdu_rel15->BWPStart) * 3;
dmrs_idx = (reg_list[d][reg_count] + pdcch_pdu_rel15->BWPStart + rb_offset) * 3;
else
dmrs_idx = (reg_list[d][reg_count] + rb_offset) * 3;