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Fix PDSCH BWP Start and Size when PDSCH is scheduled with a DCI format 1_0 in any type of PDCCH common search space

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This commit is contained in:
luis_pereira87
2025-05-15 16:14:31 +01:00
parent 3dea00b006
commit 35d5309ef1
2 changed files with 36 additions and 27 deletions
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openair2/LAYER2/NR_MAC_COMMON/nr_mac_common.h
+5
View File
@@ -66,6 +66,11 @@ typedef struct {
uint64_t s_map;
} nr_prach_info_t;
typedef struct {
uint16_t bwpStart;
uint16_t bwpSize;
} bwp_info_t;
uint32_t get_Y(const NR_SearchSpace_t *ss, int slot, rnti_t rnti);
uint8_t get_BG(uint32_t A, uint16_t R);
openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_dlsch.c
+31 -27
View File
@@ -381,35 +381,39 @@ void abort_nr_dl_harq(NR_UE_info_t* UE, int8_t harq_pid)
UE->mac_stats.dl.errors++;
}
typedef struct {
int bwpStart;
int bwpSize;
} dl_bwp_info_t;
static dl_bwp_info_t get_bwp_start_size(gNB_MAC_INST *mac, NR_UE_info_t *UE)
static bwp_info_t get_pdsch_bwp_start_size(gNB_MAC_INST *nr_mac, NR_UE_info_t *UE)
{
NR_UE_DL_BWP_t *dl_bwp = &UE->current_DL_BWP;
NR_UE_sched_ctrl_t *sched_ctrl = &UE->UE_sched_ctrl;
// UE is scheduled in a set of contiguously allocated resource blocks within the active bandwidth part of size N_BWP PRBs
// except for the case when DCI format 1_0 is decoded in any common search space
// in which case the size of CORESET 0 shall be used if CORESET 0 is configured for the cell
// and the size of initial DL bandwidth part shall be used if CORESET 0 is not configured for the cell.
// TS 38.214 Section 5.1.2.2.2
dl_bwp_info_t bwp_info;
bwp_info.bwpSize = dl_bwp->BWPSize;
bwp_info.bwpStart = dl_bwp->BWPStart;
if (sched_ctrl->search_space->searchSpaceType->present == NR_SearchSpace__searchSpaceType_PR_common &&
dl_bwp->dci_format == NR_DL_DCI_FORMAT_1_0) {
if (mac->cset0_bwp_size != 0) {
bwp_info.bwpStart = mac->cset0_bwp_start;
bwp_info.bwpSize = mac->cset0_bwp_size;
bwp_info_t bwp_info;
// 3GPP TS 38.214 Section 5.1.2.2 Resource allocation in frequency domain
// For a PDSCH scheduled with a DCI format 1_0 in any type of PDCCH common search space, regardless of which bandwidth part is the
// active bandwidth part, RB numbering starts from the lowest RB of the CORESET in which the DCI was received; otherwise RB
// numbering starts from the lowest RB in the determined downlink bandwidth part.
//
// 3GPP TS 38.214 Section 5.1.2.2.2 Downlink resource allocation type 1
// In downlink resource allocation of type 1, the resource block assignment information indicates to a scheduled UE a set of
// contiguously allocated non-interleaved or interleaved virtual resource blocks within the active bandwidth part of size PRBs
// except for the case when DCI format 1_0 is decoded in any common search space in which case the size of CORESET 0 shall be
// used if CORESET 0 is configured for the cell and the size of initial DL bandwidth part shall be used if CORESET 0 is not
// configured for the cell.
if (dl_bwp->dci_format == NR_DL_DCI_FORMAT_1_0 && sched_ctrl->search_space->searchSpaceType
&& sched_ctrl->search_space->searchSpaceType->present == NR_SearchSpace__searchSpaceType_PR_common
&& dl_bwp->pdsch_Config->resourceAllocation == NR_PDSCH_Config__resourceAllocation_resourceAllocationType1) {
if (sched_ctrl->coreset->controlResourceSetId == 0) {
bwp_info.bwpStart = nr_mac->cset0_bwp_start;
} else {
bwp_info.bwpStart = dl_bwp->BWPStart + sched_ctrl->sched_pdcch.rb_start;
}
else {
// TODO this is not entirely correct
// start would be the start of CORESET not of the initial BWP
bwp_info.bwpStart = UE->sc_info.initial_dl_BWPStart;
bwp_info.bwpSize = UE->sc_info.initial_dl_BWPSize;
if (nr_mac->cset0_bwp_size > 0) {
bwp_info.bwpSize = min(dl_bwp->BWPSize - bwp_info.bwpStart, nr_mac->cset0_bwp_size);
} else {
bwp_info.bwpSize = min(dl_bwp->BWPSize - bwp_info.bwpStart, UE->sc_info.initial_dl_BWPSize);
}
} else {
bwp_info.bwpSize = dl_bwp->BWPSize;
bwp_info.bwpStart = dl_bwp->BWPStart;
}
return bwp_info;
}
@@ -463,7 +467,7 @@ static bool allocate_dl_retransmission(module_id_t module_id,
uint16_t *rballoc_mask = nr_mac->common_channels[CC_id].vrb_map[beam_idx];
dl_bwp_info_t bwp_info = get_bwp_start_size(nr_mac, UE);
bwp_info_t bwp_info = get_pdsch_bwp_start_size(nr_mac, UE);
int rbStart = bwp_info.bwpStart;
int rbStop = bwp_info.bwpStart + bwp_info.bwpSize - 1;
int rbSize = 0;
@@ -758,7 +762,7 @@ static void pf_dl(module_id_t module_id,
const uint16_t slbitmap = SL_to_bitmap(tda_info->startSymbolIndex, tda_info->nrOfSymbols);
uint16_t *rballoc_mask = mac->common_channels[CC_id].vrb_map[beam.idx];
dl_bwp_info_t bwp_info = get_bwp_start_size(mac, iterator->UE);
bwp_info_t bwp_info = get_pdsch_bwp_start_size(mac, iterator->UE);
int rbStart = 0; // WRT BWP start
int rbStop = bwp_info.bwpSize - 1;
int bwp_start = bwp_info.bwpStart;
@@ -1060,7 +1064,7 @@ void nr_schedule_ue_spec(module_id_t module_id,
const int pduindex = gNB_mac->pdu_index[CC_id]++;
pdsch_pdu->pduIndex = pduindex;
dl_bwp_info_t bwp_info = get_bwp_start_size(gNB_mac, UE);
bwp_info_t bwp_info = get_pdsch_bwp_start_size(gNB_mac, UE);
pdsch_pdu->BWPSize = bwp_info.bwpSize;
pdsch_pdu->BWPStart = bwp_info.bwpStart;