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Updated TBS calculation for multiple DMRS positions in a slot

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- TBS calculation was done wothout considering mulilple DMRS symbols in
  a slot, which is corrected now.
This commit is contained in:
Parminder Singh
2020-11-27 15:56:15 +01:00
committed by Thomas Schlichter
parent d7d2faa0bf
commit 334bf336b7
3 changed files with 16 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files
openair2/LAYER2/NR_MAC_COMMON/nr_mac_common.c
+4
View File
@@ -2122,6 +2122,10 @@ int get_num_dmrs(uint16_t dmrs_mask ) {
for (int i=0;i<16;i++) num_dmrs+=((dmrs_mask>>i)&1);
return(num_dmrs);
}
/* returns the total DMRS symbols in a slot*/
uint8_t get_num_dmrs_symbols(NR_PDSCH_Config_t *pdsch_Config,int dmrs_TypeA_Position,int NrOfSymbols){
return get_num_dmrs(fill_dmrs_mask(pdsch_Config,dmrs_TypeA_Position,NrOfSymbols));
}
// Table 5.1.2.2.1-1 38.214
uint8_t getRBGSize(uint16_t bwp_size, long rbg_size_config) {
openair2/LAYER2/NR_MAC_COMMON/nr_mac_common.h
+3
View File
@@ -185,4 +185,7 @@ bool set_dl_ptrs_values(NR_PTRS_DownlinkConfig_t *ptrs_config,
uint8_t *K_ptrs, uint8_t *L_ptrs,uint8_t *portIndex,
uint8_t *nERatio,uint8_t *reOffset,
uint8_t NrOfSymbols);
uint8_t get_num_dmrs_symbols(NR_PDSCH_Config_t *pdsch_Config,int dmrs_TypeA_Position,int NrOfSymbols);
#endif
openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_dlsch.c
+9 -4
View File
@@ -504,6 +504,9 @@ void nr_simple_dlsch_preprocessor(module_id_t module_id,
getN_PRB_DMRS(sched_ctrl->active_bwp, sched_ctrl->numDmrsCdmGrpsNoData);
int nrOfSymbols = getNrOfSymbols(sched_ctrl->active_bwp,
sched_ctrl->time_domain_allocation);
uint8_t N_DMRS_SLOT = get_num_dmrs_symbols(sched_ctrl->active_bwp->bwp_Dedicated->pdsch_Config->choice.setup,
RC.nrmac[module_id]->common_channels->ServingCellConfigCommon->dmrs_TypeA_Position ,
nrOfSymbols);
int rbSize = 0;
const int oh = 2 + (sched_ctrl->num_total_bytes >= 256)
@@ -515,8 +518,7 @@ void nr_simple_dlsch_preprocessor(module_id_t module_id,
nr_get_code_rate_dl(sched_ctrl->mcs, sched_ctrl->mcsTableIdx),
rbSize,
nrOfSymbols,
N_PRB_DMRS, // FIXME // This should be multiplied by the
// number of dmrs symbols
N_PRB_DMRS * N_DMRS_SLOT,
0 /* N_PRB_oh, 0 for initialBWP */,
0 /* tb_scaling */,
1 /* nrOfLayers */)
@@ -574,13 +576,16 @@ void nr_schedule_ue_spec(module_id_t module_id,
uint8_t N_PRB_DMRS =
getN_PRB_DMRS(sched_ctrl->active_bwp, sched_ctrl->numDmrsCdmGrpsNoData);
uint8_t N_DMRS_SLOT = get_num_dmrs_symbols(sched_ctrl->active_bwp->bwp_Dedicated->pdsch_Config->choice.setup,
RC.nrmac[module_id]->common_channels->ServingCellConfigCommon->dmrs_TypeA_Position ,
nrOfSymbols);
const uint32_t TBS =
nr_compute_tbs(nr_get_Qm_dl(sched_ctrl->mcs, sched_ctrl->mcsTableIdx),
nr_get_code_rate_dl(sched_ctrl->mcs, sched_ctrl->mcsTableIdx),
sched_ctrl->rbSize,
nrOfSymbols,
N_PRB_DMRS, // FIXME // This should be multiplied by the
// number of dmrs symbols
N_PRB_DMRS * N_DMRS_SLOT,
0 /* N_PRB_oh, 0 for initialBWP */,
0 /* tb_scaling */,
1 /* nrOfLayers */)