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avoid using PUCCH for SCell DL allocations

This commit is contained in:
Francisco Paisana 2020-06-09 16:38:59 +01:00
parent 2f421d3e30
commit 1393bd11fa
1 changed files with 11 additions and 7 deletions
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18
srsenb/src/stack/mac/scheduler_grid.cc
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@ -758,19 +758,23 @@ alloc_outcome_t sf_sched::alloc_dl_user(sched_ue* user, const rbgmask_t& user_ma
const srslte_cqi_report_cfg_t& cqi_report = ue_cfg.dl_cfg.cqi_report;
if (has_scells and srslte_cqi_periodic_send(&cqi_report, get_tti_tx_ul(), SRSLTE_FDD)) {
bool has_pusch_grant = is_ul_alloc(user) or cc_results->is_ul_alloc(user->get_rnti());
bool has_dl_allocs = cc_results->is_dl_alloc(user->get_rnti());
if (not has_pusch_grant and has_dl_allocs) {
// Try to allocate small PUSCH grant, if there are no pending UL retxs
ul_harq_proc* hul = user->get_ul_harq(get_tti_tx_ul(), ue_cc_idx);
bool has_retx = hul->has_pending_retx();
if (not has_pusch_grant) {
// Try to allocate small PUSCH grant, if there are no pending UL retxs for this TTI
alloc_outcome_t pusch_alloc_outcome = alloc_outcome_t::PUCCH_COLLISION;
ul_harq_proc* hul = user->get_ul_harq(get_tti_tx_ul(), ue_cc_idx);
bool has_retx = hul->has_pending_retx();
if (not has_retx) {
ul_harq_proc::ul_alloc_t alloc = {};
uint32_t L = user->get_required_prb_ul(ue_cc_idx, srslte::ceil_div(SRSLTE_UCI_CQI_CODED_PUCCH_B + 2, 8));
tti_alloc.find_ul_alloc(L, &alloc);
if (alloc.L == 0 or not alloc_ul_user(user, alloc)) {
return alloc_outcome_t::PUCCH_COLLISION;
if (alloc.L > 0 and alloc_ul_user(user, alloc)) {
pusch_alloc_outcome = alloc_outcome_t::SUCCESS;
}
}
// For SCells, if we can't allocate small PUSCH grant, abort DL allocation
if (ue_cc_idx != 0 and pusch_alloc_outcome != alloc_outcome_t::SUCCESS) {
return pusch_alloc_outcome;
}
}
}