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fix for pointa computation in sib1

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This commit is contained in:
francescomani
2021-09-08 14:21:28 +02:00
parent b590cec2e3
commit afdb5728ed
1 changed files with 22 additions and 8 deletions
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openair2/RRC/NR/MESSAGES/asn1_msg.c
+22 -8
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@@ -419,14 +419,28 @@ uint8_t do_SIB1_NR(rrc_gNB_carrier_data_t *carrier,
nrMultiBandInfo->freqBandIndicatorNR = configuration->scc->downlinkConfigCommon->frequencyInfoDL->frequencyBandList.list.array[i];
ASN_SEQUENCE_ADD(&sib1->servingCellConfigCommon->downlinkConfigCommon.frequencyInfoDL.frequencyBandList.list,nrMultiBandInfo);
}
int ref_scs;
if (configuration->scc->downlinkConfigCommon->frequencyInfoDL->absoluteFrequencyPointA < 600000)
ref_scs = 0; // 15 khz
if (configuration->scc->downlinkConfigCommon->frequencyInfoDL->absoluteFrequencyPointA > 2016666)
ref_scs = 3; // 60 khz
uint32_t absolute_diff = (*configuration->scc->downlinkConfigCommon->frequencyInfoDL->absoluteFrequencySSB - configuration->scc->downlinkConfigCommon->frequencyInfoDL->absoluteFrequencyPointA);
sib1->servingCellConfigCommon->downlinkConfigCommon.frequencyInfoDL.offsetToPointA =
(absolute_diff/12) - (10<<(configuration->scc->downlinkConfigCommon->initialDownlinkBWP->genericParameters.subcarrierSpacing - ref_scs));
int scs_scaling0 = 1<<(configuration->scc->downlinkConfigCommon->initialDownlinkBWP->genericParameters.subcarrierSpacing);
int scs_scaling = scs_scaling0;
int scs_scaling2 = scs_scaling0;
if (configuration->scc->downlinkConfigCommon->frequencyInfoDL->absoluteFrequencyPointA < 600000) {
scs_scaling = scs_scaling0*3;
}
if (configuration->scc->downlinkConfigCommon->frequencyInfoDL->absoluteFrequencyPointA > 2016666) {
scs_scaling = scs_scaling0>>2;
scs_scaling2 = scs_scaling0>>2;
}
uint32_t absolute_diff = (*configuration->scc->downlinkConfigCommon->frequencyInfoDL->absoluteFrequencySSB -
configuration->scc->downlinkConfigCommon->frequencyInfoDL->absoluteFrequencyPointA);
sib1->servingCellConfigCommon->downlinkConfigCommon.frequencyInfoDL.offsetToPointA = scs_scaling2 * (absolute_diff/(12*scs_scaling) - 10);
LOG_I(NR_RRC,"SIB1 freq: absoluteFrequencySSB %ld, absoluteFrequencyPointA %ld\n",
*configuration->scc->downlinkConfigCommon->frequencyInfoDL->absoluteFrequencySSB,
configuration->scc->downlinkConfigCommon->frequencyInfoDL->absoluteFrequencyPointA);
LOG_I(NR_RRC,"SIB1 freq: absolute_diff %d, %d*(absolute_diff/(12*%d) - 10) %d\n",
absolute_diff,scs_scaling2,scs_scaling,(int)sib1->servingCellConfigCommon->downlinkConfigCommon.frequencyInfoDL.offsetToPointA);
for(int i = 0; i< configuration->scc->downlinkConfigCommon->frequencyInfoDL->scs_SpecificCarrierList.list.count; i++) {
ASN_SEQUENCE_ADD(&sib1->servingCellConfigCommon->downlinkConfigCommon.frequencyInfoDL.scs_SpecificCarrierList.list,configuration->scc->downlinkConfigCommon->frequencyInfoDL->scs_SpecificCarrierList.list.array[i]);
}