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remove false DCI reception indication

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This commit is contained in:
francescomani
2024-04-29 12:39:44 +02:00
parent 8a3c329e90
commit 90f82d19da
2 changed files with 23 additions and 65 deletions
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openair1/PHY/CODING/nrPolar_tools/nr_polar_encoder.c
+6 -6
View File
@@ -488,12 +488,12 @@ void build_polar_tables(t_nrPolar_params *polarParams) {
void polar_encoder_fast(uint64_t *A,
void *out,
int32_t crcmask,
uint8_t ones_flag,
int8_t messageType,
uint16_t messageLength,
uint8_t aggregation_level) {
int32_t crcmask,
uint8_t ones_flag,
int8_t messageType,
uint16_t messageLength,
uint8_t aggregation_level)
{
t_nrPolar_params *polarParams=nr_polar_params(messageType, messageLength, aggregation_level, false);
#ifdef POLAR_CODING_DEBUG
openair1/PHY/NR_UE_TRANSPORT/dci_nr.c
+17 -59
View File
@@ -680,36 +680,6 @@ static void nr_pdcch_unscrambling(c16_t *e_rx,
}
}
/* This function compares the received DCI bits with
* re-encoded DCI bits and returns the number of mismatched bits
*/
static uint16_t nr_dci_false_detection(uint64_t *dci,
int16_t *soft_in,
int encoded_length,
int rnti,
int8_t messageType,
uint16_t messageLength,
uint8_t aggregation_level)
{
uint32_t encoder_output[NR_MAX_DCI_SIZE_DWORD];
polar_encoder_fast(dci, (void *)encoder_output, rnti, 1, messageType, messageLength, aggregation_level);
uint8_t *enout_p = (uint8_t*)encoder_output;
uint16_t x = 0;
for (int i=0; i<encoded_length/8; i++) {
x += (enout_p[i] & 1) ^ ((soft_in[i * 8] >> 15) & 1);
x += ((enout_p[i] >> 1) & 1) ^ ((soft_in[i * 8 + 1] >> 15) & 1);
x += ((enout_p[i] >> 2) & 1) ^ ((soft_in[i * 8 + 2] >> 15) & 1);
x += ((enout_p[i] >> 3) & 1) ^ ((soft_in[i * 8 + 3] >> 15) & 1);
x += ((enout_p[i] >> 4) & 1) ^ ((soft_in[i * 8 + 4] >> 15) & 1);
x += ((enout_p[i] >> 5) & 1) ^ ((soft_in[i * 8 + 5] >> 15) & 1);
x += ((enout_p[i] >> 6) & 1) ^ ((soft_in[i * 8 + 6] >> 15) & 1);
x += ((enout_p[i] >> 7) & 1) ^ ((soft_in[i * 8 + 7] >> 15) & 1);
}
return x;
}
void nr_dci_decoding_procedure(PHY_VARS_NR_UE *ue,
const UE_nr_rxtx_proc_t *proc,
c16_t *pdcch_e_rx,
@@ -771,35 +741,23 @@ void nr_dci_decoding_procedure(PHY_VARS_NR_UE *ue,
CCEind,
dci_length,
*(unsigned long long *)dci_estimation);
uint16_t mb = nr_dci_false_detection(dci_estimation, tmp_e, L * 108, n_rnti, NR_POLAR_DCI_MESSAGE_TYPE, dci_length, L);
ue->dci_thres = (ue->dci_thres + mb) / 2;
if (mb > (ue->dci_thres + 30)) {
LOG_W(NR_PHY_DCI,
"DCI false positive. Dropping DCI index %d. Mismatched bits: %d/%d. Current DCI threshold: %d\n",
j,
mb,
L * 108,
ue->dci_thres);
continue;
} else {
AssertFatal(dci_ind->number_of_dcis < sizeofArray(dci_ind->dci_list), "Fix allocation\n");
fapi_nr_dci_indication_pdu_t *dci = dci_ind->dci_list + dci_ind->number_of_dcis;
*dci = (fapi_nr_dci_indication_pdu_t){
.rnti = n_rnti,
.n_CCE = CCEind,
.N_CCE = L,
.dci_format = rel15->dci_format_options[k],
.ss_type = rel15->ss_type_options[k],
.coreset_type = rel15->coreset.CoreSetType,
};
int n_rb, rb_offset;
get_coreset_rballoc(rel15->coreset.frequency_domain_resource, &n_rb, &rb_offset);
dci->cset_start = rel15->BWPStart + rb_offset;
dci->payloadSize = dci_length;
memcpy(dci->payloadBits, dci_estimation, (dci_length + 7) / 8);
dci_ind->number_of_dcis++;
break; // If DCI is found, no need to check for remaining DCI lengths
}
AssertFatal(dci_ind->number_of_dcis < sizeofArray(dci_ind->dci_list), "Fix allocation\n");
fapi_nr_dci_indication_pdu_t *dci = dci_ind->dci_list + dci_ind->number_of_dcis;
*dci = (fapi_nr_dci_indication_pdu_t){
.rnti = n_rnti,
.n_CCE = CCEind,
.N_CCE = L,
.dci_format = rel15->dci_format_options[k],
.ss_type = rel15->ss_type_options[k],
.coreset_type = rel15->coreset.CoreSetType,
};
int n_rb, rb_offset;
get_coreset_rballoc(rel15->coreset.frequency_domain_resource, &n_rb, &rb_offset);
dci->cset_start = rel15->BWPStart + rb_offset;
dci->payloadSize = dci_length;
memcpy(dci->payloadBits, dci_estimation, (dci_length + 7) / 8);
dci_ind->number_of_dcis++;
break; // If DCI is found, no need to check for remaining DCI lengths
} else {
LOG_D(NR_PHY_DCI,
"(%i.%i) Decoded crc %x does not match rnti %x for DCI format %d\n",