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use common method to build mac pdu. allow CE allocations in dci format2/2a

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master
Francisco Paisana 5 years ago committed by Francisco Paisana
parent 64557740fc
commit 20f6655c6b
2 changed files with 90 additions and 55 deletions
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13
srsenb/hdr/stack/mac/scheduler_ue.h
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@ -201,8 +201,17 @@ private:
bool is_sr_triggered();
int alloc_rlc_pdu(sched_interface::dl_sched_pdu_t* mac_sdu, int rem_tbs);
uint32_t allocate_mac_sdus(sched_interface::dl_sched_data_t* data, uint32_t total_tbs, uint32_t tbidx);
int alloc_rlc_pdu(sched_interface::dl_sched_pdu_t* mac_sdu, int rem_tbs);
uint32_t allocate_mac_sdus(sched_interface::dl_sched_data_t* data, uint32_t total_tbs, uint32_t tbidx);
uint32_t allocate_mac_ces(sched_interface::dl_sched_data_t* data, uint32_t total_tbs, uint32_t ue_cc_idx);
std::pair<int, int> allocate_new_dl_mac_pdu(sched_interface::dl_sched_data_t* data,
dl_harq_proc* h,
const rbgmask_t& user_mask,
uint32_t tti_tx_dl,
uint32_t ue_cc_idx,
uint32_t cfi,
uint32_t tb,
const char* dci_format);
std::pair<int, int> compute_mcs_and_tbs(uint32_t ue_cc_idx,
uint32_t tti_tx_dl,

132
srsenb/src/stack/mac/scheduler_ue.cc
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@ -399,6 +399,71 @@ uint32_t sched_ue::allocate_mac_sdus(sched_interface::dl_sched_data_t* data, uin
return total_tbs - rem_tbs;
}
/**
* Allocate space for pending MAC CEs
* @param data struct where the MAC CEs allocations are stored
* @param total_tbs available space in bytes for allocations
* @return number of bytes allocated
*/
uint32_t sched_ue::allocate_mac_ces(sched_interface::dl_sched_data_t* data, uint32_t total_tbs, uint32_t ue_cc_idx)
{
if (ue_cc_idx != 0) {
return 0;
}
int rem_tbs = total_tbs;
while (not pending_ces.empty()) {
int toalloc = pending_ces.front().get_req_bytes(cfg);
if (rem_tbs < toalloc) {
break;
}
data->pdu[0][data->nof_pdu_elems[0]].lcid = pending_ces.front().cetype;
data->nof_pdu_elems[0]++;
rem_tbs -= toalloc;
Info("SCHED: Added a MAC %s CE for rnti=0x%x\n", pending_ces.front().to_string().c_str(), rnti);
pending_ces.pop_front();
}
return total_tbs - rem_tbs;
}
/**
* Allocate space
* @param data
* @param total_tbs
* @param ue_cc_idx
* @return pair with allocated tbs and mcs
*/
std::pair<int, int> sched_ue::allocate_new_dl_mac_pdu(sched::dl_sched_data_t* data,
dl_harq_proc* h,
const rbgmask_t& user_mask,
uint32_t tti_tx_dl,
uint32_t ue_cc_idx,
uint32_t cfi,
uint32_t tb,
const char* dci_format)
{
srslte_dci_dl_t* dci = &data->dci;
uint32_t nof_prb = sched_utils::count_prb_per_tb(*carriers[ue_cc_idx].get_cell_cfg(), user_mask);
auto ret = compute_mcs_and_tbs(ue_cc_idx, tti_tx_dl, nof_prb, cfi, *dci);
int mcs = ret.first;
int tbs = ret.second;
/* Allocate MAC PDU (subheaders, CEs, and SDUS) */
int rem_tbs = tbs;
rem_tbs -= allocate_mac_ces(data, rem_tbs, ue_cc_idx);
rem_tbs -= allocate_mac_sdus(data, rem_tbs, tb);
/* Allocate DL UE Harq */
if (rem_tbs != tbs) {
h->new_tx(user_mask, tb, tti_tx_dl, mcs, tbs, data->dci.location.ncce);
Debug("SCHED: Alloc DCI format%s new mcs=%d, tbs=%d, nof_prb=%d\n", dci_format, mcs, tbs, nof_prb);
} else {
Warning("SCHED: Failed to allocate DL harq pid=%d\n", h->get_id());
}
return std::make_pair(tbs, mcs);
}
int sched_ue::generate_dl_dci_format(uint32_t pid,
sched_interface::dl_sched_data_t* data,
uint32_t tti_tx_dl,
@ -430,11 +495,11 @@ int sched_ue::generate_dl_dci_format(uint32_t pid,
int sched_ue::generate_format1(uint32_t pid,
sched_interface::dl_sched_data_t* data,
uint32_t tti_tx_dl,
uint32_t cc_idx,
uint32_t ue_cc_idx,
uint32_t cfi,
const rbgmask_t& user_mask)
{
dl_harq_proc* h = &carriers[cc_idx].harq_ent.dl_harq_procs()[pid];
dl_harq_proc* h = &carriers[ue_cc_idx].harq_ent.dl_harq_procs()[pid];
srslte_dci_dl_t* dci = &data->dci;
int mcs = 0;
@ -444,40 +509,9 @@ int sched_ue::generate_format1(uint32_t pid,
dci->type0_alloc.rbg_bitmask = (uint32_t)user_mask.to_uint64();
if (h->is_empty(0)) {
uint32_t req_bytes = get_pending_dl_new_data_total();
uint32_t nof_prb = sched_utils::count_prb_per_tb(*carriers[cc_idx].get_cell_cfg(), user_mask);
auto ret = compute_mcs_and_tbs(cc_idx, tti_tx_dl, nof_prb, cfi, *dci);
mcs = ret.first;
tbs = ret.second;
/* Allocate MAC PDU (subheaders, CEs, and SDUS) */
int rem_tbs = tbs;
// Allocate MAC CE CMDs
while (cc_idx == 0 and not pending_ces.empty()) {
int toalloc = pending_ces.front().get_req_bytes(cfg);
if (rem_tbs < toalloc) {
break;
}
data->pdu[0][data->nof_pdu_elems[0]].lcid = pending_ces.front().cetype;
data->nof_pdu_elems[0]++;
rem_tbs -= toalloc;
Info("SCHED: Added a MAC %s CE for rnti=0x%x\n", pending_ces.front().to_string().c_str(), rnti);
pending_ces.pop_front();
}
// Allocate MAC SDU and respective subheaders
rem_tbs -= allocate_mac_sdus(data, rem_tbs, 0);
// Allocate DL Harq, if there was at least one successful allocation
if (rem_tbs != tbs) {
h->new_tx(user_mask, 0, tti_tx_dl, mcs, tbs, data->dci.location.ncce);
Debug("SCHED: Alloc format1 new mcs=%d, tbs=%d, nof_prb=%d, req_bytes=%d\n", mcs, tbs, nof_prb, req_bytes);
} else {
Warning("SCHED: Failed to allocate DL harq pid=%d\n", h->get_id());
}
auto ret = allocate_new_dl_mac_pdu(data, h, user_mask, tti_tx_dl, ue_cc_idx, cfi, 0, "1");
tbs = ret.first;
mcs = ret.second;
} else {
h->new_retx(user_mask, 0, tti_tx_dl, &mcs, &tbs, data->dci.location.ncce);
Debug("SCHED: Alloc format1 previous mcs=%d, tbs=%d\n", mcs, tbs);
@ -486,7 +520,7 @@ int sched_ue::generate_format1(uint32_t pid,
if (tbs > 0) {
dci->rnti = rnti;
dci->pid = h->get_id();
dci->ue_cc_idx = cc_idx;
dci->ue_cc_idx = ue_cc_idx;
dci->tb[0].mcs_idx = (uint32_t)mcs;
dci->tb[0].rv = sched_utils::get_rvidx(h->nof_retx(0));
dci->tb[0].ndi = h->get_ndi(0);
@ -552,22 +586,20 @@ std::pair<int, int> sched_ue::compute_mcs_and_tbs(uint32_t ue_cc_i
int sched_ue::generate_format2a(uint32_t pid,
sched_interface::dl_sched_data_t* data,
uint32_t tti_tx_dl,
uint32_t cc_idx,
uint32_t ue_cc_idx,
uint32_t cfi,
const rbgmask_t& user_mask)
{
dl_harq_proc* h = &carriers[cc_idx].harq_ent.dl_harq_procs()[pid];
dl_harq_proc* h = &carriers[ue_cc_idx].harq_ent.dl_harq_procs()[pid];
bool tb_en[SRSLTE_MAX_TB] = {false};
srslte_dci_dl_t* dci = &data->dci;
dci->alloc_type = SRSLTE_RA_ALLOC_TYPE0;
dci->type0_alloc.rbg_bitmask = (uint32_t)user_mask.to_uint64();
uint32_t nof_prb = sched_utils::count_prb_per_tb(*carriers[cc_idx].get_cell_cfg(), user_mask);
bool no_retx = true;
if (carriers[cc_idx].dl_ri == 0) {
if (carriers[ue_cc_idx].dl_ri == 0) {
if (h->is_empty(1)) {
/* One layer, tb1 buffer is empty, send tb0 only */
tb_en[0] = true;
@ -601,15 +633,9 @@ int sched_ue::generate_format2a(uint32_t pid,
Debug("SCHED: Alloc format2/2a previous mcs=%d, tbs=%d\n", mcs, tbs);
} else if (tb_en[tb] && req_bytes > 0 && no_retx) {
auto ret = compute_mcs_and_tbs(cc_idx, tti_tx_dl, nof_prb, cfi, *dci);
mcs = ret.first;
tbs = ret.second;
if (allocate_mac_sdus(data, tbs, tb) > 0) {
h->new_tx(user_mask, tb, tti_tx_dl, mcs, tbs, data->dci.location.ncce);
Debug("SCHED: Alloc format2/2a new mcs=%d, tbs=%d, nof_prb=%d, req_bytes=%d\n", mcs, tbs, nof_prb, req_bytes);
}
auto ret = allocate_new_dl_mac_pdu(data, h, user_mask, tti_tx_dl, ue_cc_idx, cfi, tb, "2/2a");
tbs = ret.first;
mcs = ret.second;
}
/* Fill DCI TB dedicated fields */
@ -631,7 +657,7 @@ int sched_ue::generate_format2a(uint32_t pid,
/* Fill common fields */
dci->format = SRSLTE_DCI_FORMAT2A;
dci->rnti = rnti;
dci->ue_cc_idx = cc_idx;
dci->ue_cc_idx = ue_cc_idx;
dci->pid = h->get_id();
dci->tpc_pucch = (uint8_t)next_tpc_pucch;
next_tpc_pucch = 1;
@ -867,7 +893,7 @@ std::pair<uint32_t, uint32_t> sched_ue::get_requested_dl_bytes(uint32_t ue_cc_id
srb0_data += compute_sdu_total_bytes(0, lch[0].buf_tx);
}
// Add pending CEs
if (is_dci_format1 and ue_cc_idx == 0) {
if (ue_cc_idx == 0) {
for (const auto& ce : pending_ces) {
sum_ce_data += ce.get_req_bytes(cfg);
}

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