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dynamic mcs selection for msg2

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This commit is contained in:
francescomani
2022-01-06 14:40:52 +01:00
parent d385c2126b
commit 7f20ad6c6e
1 changed files with 32 additions and 6 deletions
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openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_RA.c
+32 -6
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@@ -1120,7 +1120,7 @@ void nr_generate_Msg2(module_id_t module_idP, int CC_id, frame_t frameP, sub_fra
time_domain_assignment = 1;
else
time_domain_assignment = 0;
uint8_t mcsIndex = 0;
int mcsIndex = -1; // initialization value
int rbStart = 0;
int rbSize = 8;
@@ -1269,9 +1269,6 @@ void nr_generate_Msg2(module_id_t module_idP, int CC_id, frame_t frameP, sub_fra
pdsch_pdu_rel15->SubcarrierSpacing = genericParameters->subcarrierSpacing;
pdsch_pdu_rel15->CyclicPrefix = 0;
pdsch_pdu_rel15->NrOfCodewords = 1;
pdsch_pdu_rel15->targetCodeRate[0] = nr_get_code_rate_dl(mcsIndex,mcsTableIdx);
pdsch_pdu_rel15->qamModOrder[0] = 2;
pdsch_pdu_rel15->mcsIndex[0] = mcsIndex;
pdsch_pdu_rel15->mcsTable[0] = mcsTableIdx;
pdsch_pdu_rel15->rvIndex[0] = 0;
pdsch_pdu_rel15->dataScramblingId = *scc->physCellId;
@@ -1295,9 +1292,38 @@ void nr_generate_Msg2(module_id_t module_idP, int CC_id, frame_t frameP, sub_fra
startSymbolIndex,
mappingtype);
int x_Overhead = 0;
uint8_t tb_scaling = 0;
nr_get_tbs_dl(&dl_tti_pdsch_pdu->pdsch_pdu, x_Overhead, pdsch_pdu_rel15->numDmrsCdmGrpsNoData, tb_scaling);
int R, Qm;
uint8_t N_PRB_DMRS;
uint32_t TBS=0;
if (dmrsConfigType == NFAPI_NR_DMRS_TYPE1) {
// if no data in dmrs cdm group is 1 only even REs have no data
// if no data in dmrs cdm group is 2 both odd and even REs have no data
N_PRB_DMRS = pdsch_pdu_rel15->numDmrsCdmGrpsNoData*6;
}
else {
N_PRB_DMRS = pdsch_pdu_rel15->numDmrsCdmGrpsNoData*4;
}
uint16_t dmrs_length = get_num_dmrs(pdsch_pdu_rel15->dlDmrsSymbPos);
while(TBS<9) { // min TBS for RAR is 9 bytes
mcsIndex++;
R = nr_get_code_rate_dl(mcsIndex, mcsTableIdx);
Qm = nr_get_Qm_dl(mcsIndex, mcsTableIdx);
TBS = nr_compute_tbs(Qm,
R,
rbSize,
nrOfSymbols,
N_PRB_DMRS*dmrs_length,
0, // overhead
tb_scaling, // tb scaling
1)>>3; // layers
pdsch_pdu_rel15->targetCodeRate[0] = R;
pdsch_pdu_rel15->qamModOrder[0] = Qm;
pdsch_pdu_rel15->mcsIndex[0] = mcsIndex;
pdsch_pdu_rel15->TBSize[0] = TBS;
}
// Fill PDCCH DL DCI PDU
nfapi_nr_dl_dci_pdu_t *dci_pdu = &pdcch_pdu_rel15->dci_pdu[pdcch_pdu_rel15->numDlDci];