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Commit 0dd0f5ce authored by ChiehChun's avatar ChiehChun Committed by Robert Schmidt
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Create function for find CCE and retransmission

parent 13da3d6e
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Showing with 92 additions and 74 deletions
openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_dlsch.c
View file @ 0dd0f5ce
...@@ -365,6 +365,76 @@ void nr_store_dlsch_buffer(module_id_t module_id, ...@@ -365,6 +365,76 @@ void nr_store_dlsch_buffer(module_id_t module_id,
} }
} }
bool find_free_CCE(module_id_t module_id,
sub_frame_t slot,
int UE_id){
NR_UE_sched_ctrl_t *sched_ctrl = &RC.nrmac[module_id]->UE_info.UE_sched_ctrl[UE_id];
uint8_t nr_of_candidates;
find_aggregation_candidates(&sched_ctrl->aggregation_level,
&nr_of_candidates,
sched_ctrl->search_space);
const int cid = sched_ctrl->coreset->controlResourceSetId;
const uint16_t Y = RC.nrmac[module_id]->UE_info.Y[UE_id][cid][slot];
const int m = RC.nrmac[module_id]->UE_info.num_pdcch_cand[UE_id][cid];
sched_ctrl->cce_index = allocate_nr_CCEs(RC.nrmac[module_id],
sched_ctrl->active_bwp,
sched_ctrl->coreset,
sched_ctrl->aggregation_level,
Y,
m,
nr_of_candidates);
if (sched_ctrl->cce_index < 0)
return false;
RC.nrmac[module_id]->UE_info.num_pdcch_cand[UE_id][cid]++;
return true;
}
bool allocate_retransmission(module_id_t module_id,
uint8_t *rballoc_mask,
int *n_rb_sched,
int UE_id,
int current_harq_pid){
NR_UE_sched_ctrl_t *sched_ctrl = &RC.nrmac[module_id]->UE_info.UE_sched_ctrl[UE_id];
NR_UE_ret_info_t *retInfo = &sched_ctrl->retInfo[current_harq_pid];
const uint16_t bwpSize = NRRIV2BW(sched_ctrl->active_bwp->bwp_Common->genericParameters.locationAndBandwidth, MAX_BWP_SIZE);
int rbStart = NRRIV2PRBOFFSET(sched_ctrl->active_bwp->bwp_Common->genericParameters.locationAndBandwidth, MAX_BWP_SIZE);
sched_ctrl->time_domain_allocation = retInfo->time_domain_allocation;
/* ensure that there is a free place for RB allocation */
int rbSize = 0;
while (rbSize < retInfo->rbSize) {
rbStart += rbSize; /* last iteration rbSize was not enough, skip it */
rbSize = 0;
while (rbStart < bwpSize && !rballoc_mask[rbStart]) rbStart++;
if (rbStart >= bwpSize) {
LOG_E(MAC,
"cannot allocate retransmission for UE %d/RNTI %04x: no resources\n",
UE_id,
RC.nrmac[module_id]->UE_info.rnti[UE_id]);
return false;
}
while (rbStart + rbSize < bwpSize
&& rballoc_mask[rbStart + rbSize]
&& rbSize < retInfo->rbSize)
rbSize++;
}
sched_ctrl->rbSize = retInfo->rbSize;
sched_ctrl->rbStart = rbStart;
/* MCS etc: just reuse from previous scheduling opportunity */
sched_ctrl->mcsTableIdx = retInfo->mcsTableIdx;
sched_ctrl->mcs = retInfo->mcs;
sched_ctrl->numDmrsCdmGrpsNoData = retInfo->numDmrsCdmGrpsNoData;
/* retransmissions: directly allocate */
*n_rb_sched -= sched_ctrl->rbSize;
for (int rb = 0; rb < sched_ctrl->rbSize; rb++)
rballoc_mask[rb+sched_ctrl->rbStart] = 0;
return true;
}
void pf_dl(module_id_t module_id, void pf_dl(module_id_t module_id,
frame_t frame, frame_t frame,
sub_frame_t slot, sub_frame_t slot,
...@@ -379,6 +449,8 @@ void pf_dl(module_id_t module_id, ...@@ -379,6 +449,8 @@ void pf_dl(module_id_t module_id,
/* Loop UE_info->list to check retransmission */ /* Loop UE_info->list to check retransmission */
for (int UE_id = UE_list->head; UE_id >= 0; UE_id = UE_list->next[UE_id]) { for (int UE_id = UE_list->head; UE_id >= 0; UE_id = UE_list->next[UE_id]) {
NR_UE_sched_ctrl_t *sched_ctrl = &UE_info->UE_sched_ctrl[UE_id]; NR_UE_sched_ctrl_t *sched_ctrl = &UE_info->UE_sched_ctrl[UE_id];
sched_ctrl->search_space = get_searchspace(sched_ctrl->active_bwp, NR_SearchSpace__searchSpaceType_PR_ue_Specific);
sched_ctrl->coreset = get_coreset(sched_ctrl->active_bwp, sched_ctrl->search_space, 1 /* dedicated */);
/* get the PID of a HARQ process awaiting retrnasmission, or -1 otherwise */ /* get the PID of a HARQ process awaiting retrnasmission, or -1 otherwise */
sched_ctrl->dl_harq_pid = sched_ctrl->retrans_dl_harq.head; sched_ctrl->dl_harq_pid = sched_ctrl->retrans_dl_harq.head;
const rnti_t rnti = UE_info->rnti[UE_id]; const rnti_t rnti = UE_info->rnti[UE_id];
...@@ -388,31 +460,12 @@ void pf_dl(module_id_t module_id, ...@@ -388,31 +460,12 @@ void pf_dl(module_id_t module_id,
/* retransmission */ /* retransmission */
if (sched_ctrl->dl_harq_pid >= 0) { if (sched_ctrl->dl_harq_pid >= 0) {
/* Find a free CCE */ /* Find a free CCE */
const int target_ss = NR_SearchSpace__searchSpaceType_PR_ue_Specific; bool freeCCE = find_free_CCE(module_id, slot, UE_id);
sched_ctrl->search_space = get_searchspace(sched_ctrl->active_bwp, target_ss); if (!freeCCE){
uint8_t nr_of_candidates; LOG_E(MAC, "%4d.%2d could not find CCE for UE %d/RNTI %04x\n", frame, slot, UE_id, rnti);
find_aggregation_candidates(&sched_ctrl->aggregation_level, continue;
&nr_of_candidates,
sched_ctrl->search_space);
sched_ctrl->coreset = get_coreset(sched_ctrl->active_bwp, sched_ctrl->search_space, 1 /* dedicated */);
int cid = sched_ctrl->coreset->controlResourceSetId;
const uint16_t Y = UE_info->Y[UE_id][cid][slot];
const int m = UE_info->num_pdcch_cand[UE_id][cid];
sched_ctrl->cce_index = allocate_nr_CCEs(RC.nrmac[module_id],
sched_ctrl->active_bwp,
sched_ctrl->coreset,
sched_ctrl->aggregation_level,
Y,
m,
nr_of_candidates);
if (sched_ctrl->cce_index < 0) {
LOG_E(MAC, "%s(): could not find CCE for UE %d\n", __func__, UE_id);
return;
} }
UE_info->num_pdcch_cand[UE_id][cid]++;
/* Find PUCCH occasion: if it fails, undo CCE allocation (undoing PUCCH /* Find PUCCH occasion: if it fails, undo CCE allocation (undoing PUCCH
* allocation after CCE alloc fail would be more complex) */ * allocation after CCE alloc fail would be more complex) */
const bool alloc = nr_acknack_scheduling(module_id, UE_id, frame, slot); const bool alloc = nr_acknack_scheduling(module_id, UE_id, frame, slot);
...@@ -424,44 +477,22 @@ void pf_dl(module_id_t module_id, ...@@ -424,44 +477,22 @@ void pf_dl(module_id_t module_id,
rnti, rnti,
frame, frame,
slot); slot);
int cid = sched_ctrl->coreset->controlResourceSetId;
UE_info->num_pdcch_cand[UE_id][cid]--; UE_info->num_pdcch_cand[UE_id][cid]--;
int *cce_list = RC.nrmac[module_id]->cce_list[sched_ctrl->active_bwp->bwp_Id][cid]; int *cce_list = RC.nrmac[module_id]->cce_list[sched_ctrl->active_bwp->bwp_Id][cid];
for (int i = 0; i < sched_ctrl->aggregation_level; i++) for (int i = 0; i < sched_ctrl->aggregation_level; i++)
cce_list[sched_ctrl->cce_index + i] = 0; cce_list[sched_ctrl->cce_index + i] = 0;
return; return;
} }
/* Allocate retransmission */ /* Allocate retransmission */
NR_UE_ret_info_t *retInfo = &sched_ctrl->retInfo[sched_ctrl->dl_harq_pid]; bool r = allocate_retransmission(module_id, rballoc_mask, &n_rb_sched, UE_id, sched_ctrl->dl_harq_pid);
sched_ctrl->time_domain_allocation = retInfo->time_domain_allocation; if (!r) {
LOG_E(MAC, "%4d.%2d retransmission can NOT be allocated\n", frame, slot);
/* ensure that there is a free place for RB allocation */ continue;
int rbSize = 0;
const uint16_t bwpSize = NRRIV2BW(sched_ctrl->active_bwp->bwp_Common->genericParameters.locationAndBandwidth, 275);
int rbStart = NRRIV2PRBOFFSET(sched_ctrl->active_bwp->bwp_Common->genericParameters.locationAndBandwidth, 275);
while (rbSize < retInfo->rbSize) {
rbStart += rbSize; /* last iteration rbSize was not enough, skip it */
rbSize = 0;
while (rbStart < bwpSize && !rballoc_mask[rbStart]) rbStart++;
if (rbStart >= bwpSize) {
LOG_E(MAC,
"cannot allocate retransmission for UE %d/RNTI %04x: no resources\n",
UE_id,
rnti);
return;
}
while (rbStart + rbSize < bwpSize
&& rballoc_mask[rbStart + rbSize]
&& rbSize < retInfo->rbSize)
rbSize++;
} }
sched_ctrl->rbSize = retInfo->rbSize; /* reduce max_num_ue once we are sure UE can be allocated, i.e., has CCE */
sched_ctrl->rbStart = rbStart; max_num_ue--;
if (max_num_ue < 0) return;
/* MCS etc: just reuse from previous scheduling opportunity */
sched_ctrl->mcsTableIdx = retInfo->mcsTableIdx;
sched_ctrl->mcs = retInfo->mcs;
sched_ctrl->numDmrsCdmGrpsNoData = retInfo->numDmrsCdmGrpsNoData;
} else { } else {
/* Check DL buffer */ /* Check DL buffer */
...@@ -484,28 +515,14 @@ void pf_dl(module_id_t module_id, ...@@ -484,28 +515,14 @@ void pf_dl(module_id_t module_id,
/* Find max coeff from UE_sched*/ /* Find max coeff from UE_sched*/
/* Find a free CCE */ /* Find a free CCE */
const int target_ss = NR_SearchSpace__searchSpaceType_PR_ue_Specific; bool freeCCE = find_free_CCE(module_id, slot, UE_id);
sched_ctrl->search_space = get_searchspace(sched_ctrl->active_bwp, target_ss); if (!freeCCE) {
uint8_t nr_of_candidates; LOG_E(MAC, "%4d.%2d could not find CCE for UE %d/RNTI %04x\n", frame, slot, UE_id, rnti);
find_aggregation_candidates(&sched_ctrl->aggregation_level,
&nr_of_candidates,
sched_ctrl->search_space);
sched_ctrl->coreset = get_coreset(sched_ctrl->active_bwp, sched_ctrl->search_space, 1 /* dedicated */);
int cid = sched_ctrl->coreset->controlResourceSetId;
const uint16_t Y = UE_info->Y[UE_id][cid][slot];
const int m = UE_info->num_pdcch_cand[UE_id][cid];
sched_ctrl->cce_index = allocate_nr_CCEs(RC.nrmac[module_id],
sched_ctrl->active_bwp,
sched_ctrl->coreset,
sched_ctrl->aggregation_level,
Y,
m,
nr_of_candidates);
if (sched_ctrl->cce_index < 0) {
LOG_E(MAC, "%s(): could not find CCE for UE %d\n", __func__, UE_id);
return; return;
} }
UE_info->num_pdcch_cand[UE_id][cid]++; /* reduce max_num_ue once we are sure UE can be allocated, i.e., has CCE */
max_num_ue--;
if (max_num_ue < 0) return;
/* Find PUCCH occasion: if it fails, undo CCE allocation (undoing PUCCH /* Find PUCCH occasion: if it fails, undo CCE allocation (undoing PUCCH
* allocation after CCE alloc fail would be more complex) */ * allocation after CCE alloc fail would be more complex) */
...@@ -518,6 +535,7 @@ void pf_dl(module_id_t module_id, ...@@ -518,6 +535,7 @@ void pf_dl(module_id_t module_id,
rnti, rnti,
frame, frame,
slot); slot);
int cid = sched_ctrl->coreset->controlResourceSetId;
UE_info->num_pdcch_cand[UE_id][cid]--; UE_info->num_pdcch_cand[UE_id][cid]--;
int *cce_list = RC.nrmac[module_id]->cce_list[sched_ctrl->active_bwp->bwp_Id][cid]; int *cce_list = RC.nrmac[module_id]->cce_list[sched_ctrl->active_bwp->bwp_Id][cid];
for (int i = 0; i < sched_ctrl->aggregation_level; i++) for (int i = 0; i < sched_ctrl->aggregation_level; i++)
......
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