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Check for CCE allocation in DL PP

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This commit is contained in:
Robert Schmidt
2020-04-06 13:56:56 +02:00
parent ed6e5ce832
commit c76af0a142
1 changed files with 19 additions and 5 deletions
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openair2/LAYER2/MAC/pre_processor.c
+19 -5
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@@ -90,12 +90,18 @@ int round_robin_dl(module_id_t Mod_id,
const uint8_t round = ue_ctrl->round[CC_id][harq_pid];
if (round != 8) { // retransmission: allocate
int nb_rb = UE_info->UE_template[CC_id][UE_id].nb_rb[harq_pid];
if (nb_rb % RBGsize != 0) {
if (nb_rb == 0)
continue;
if (nb_rb % RBGsize != 0)
nb_rb += nb_rb % RBGsize; // should now divide evenly
}
int nb_rbg = nb_rb / RBGsize;
if (nb_rbg > n_rbg_sched) // needs more RBGs than we can allocate
continue;
const uint8_t cqi = ue_ctrl->dl_cqi[CC_id];
const int idx = CCE_try_allocate_dlsch(Mod_id, CC_id, subframe, UE_id, cqi);
if (idx < 0)
continue; // cannot allocate CCE
ue_ctrl->pre_dci_dl_pdu_idx = idx;
// retransmissions: directly allocate
n_rbg_sched -= nb_rbg;
ue_ctrl->pre_nb_available_rbs[CC_id] += nb_rb;
@@ -155,8 +161,16 @@ int round_robin_dl(module_id_t Mod_id,
while (num_ue_sched < max_num_ue) {
while (rb_required[UE_id] == 0)
UE_id = next_ue_list_looped(UE_list, UE_id);
/* TODO: check that CCE allocation is feasible. If it is not, reduce
* num_ue_req anyway because this would have been one opportunity */
const uint8_t cqi = UE_info->UE_sched_ctrl[UE_id].dl_cqi[CC_id];
const int idx = CCE_try_allocate_dlsch(Mod_id, CC_id, subframe, UE_id, cqi);
if (idx < 0) {
LOG_D(MAC, "cannot allocate CCE for UE %d, skipping\n", UE_id);
num_ue_req--;
max_num_ue = min(min(max_num_ue, num_ue_req), n_rbg_sched);
UE_id = next_ue_list_looped(UE_list, UE_id); // next candidate
continue;
}
UE_info->UE_sched_ctrl[UE_id].pre_dci_dl_pdu_idx = idx;
*cur_UE = UE_id;
cur_UE = &UE_sched.next[UE_id];
rb_required_total += rb_required[UE_id];
@@ -347,7 +361,7 @@ dlsch_scheduler_pre_processor(module_id_t Mod_id,
frameP,
subframeP,
&UE_to_sched,
3, // max_num_ue
4, // max_num_ue
n_rbg_sched,
rbgalloc_mask);