PentHertz
/
srsLTE
mirror of https://github.com/PentHertz/srsLTE.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

eNB: retransmissions in Diversity mode

This commit is contained in:
Xavier Arteaga 2017-11-09 15:10:03 +01:00
parent 69682d488b
commit 42626a1120
1 changed files with 26 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

38
srsenb/src/mac/scheduler_ue.cc
View File

@ -458,6 +458,7 @@ int sched_ue::generate_format2a(dl_harq_proc *h,
uint32_t tti,
uint32_t cfi)
{
bool tb_en[SRSLTE_MAX_TB] = {false};
srslte_ra_dl_dci_t *dci = &data->dci;
bzero(dci, sizeof(srslte_ra_dl_dci_t));
@ -473,22 +474,35 @@ int sched_ue::generate_format2a(dl_harq_proc *h,
uint32_t nof_re = srslte_ra_dl_grant_nof_re(&grant, cell, sf_idx, nof_ctrl_symbols);
uint32_t req_bytes = get_pending_dl_new_data(tti);
if (dl_ri == 0) {
if (h->is_empty(1)) {
/* One layer, tb1 buffer is empty, send tb0 only */
tb_en[0] = true;
} else {
/* One layer, tb1 buffer is not empty, send tb1 only */
tb_en[1] = true;
}
} else {
/* Two layers, retransmit what TBs that have not been Acknowledged */
bool no_retx = true;
for (uint32_t tb = 0; tb < SRSLTE_MAX_TB; tb++) {
if (!h->is_empty(tb)) {
tb_en[tb] = true;
no_retx = false;
}
}
/* Two layers, no retransmissions... */
if (no_retx) {
tb_en[0] = true;
tb_en[1] = true;
}
}
for (uint32_t tb = 0; tb < SRSLTE_MAX_TB; tb++) {
int mcs = 0;
int tbs = 0;
/*
* If one layer (RI = 0) Then
* If TB1 has pending harq
* Send TB1 only
* Else
* Send TB0 Only
* End If
* Else (RI != 0)
* Send TB0 and TB1
* End If
*/
if (dl_ri == 1 || (dl_ri == 0 && ((tb == 0 && h->is_empty(1)) || (tb == 1 && !h->is_empty(1))))) {
if (tb_en[tb]) {
if (h->is_empty(tb)) {
if (fixed_mcs_dl < 0) {
tbs = alloc_tbs_dl(nof_prb, nof_re, req_bytes, &mcs);