fixeria
/
srsRAN
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

rlc_am: retransmit first outstanding PDU in case the tx_window is full to avoid stalling

This commit is contained in:
Andre Puschmann 2018-02-06 16:59:20 +01:00
parent 897db045bb
commit fa7d5bd40e
1 changed files with 17 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
lib/src/upper/rlc_am.cc
View File

@ -312,6 +312,23 @@ int rlc_am::read_pdu(uint8_t *payload, uint32_t nof_bytes)
pthread_mutex_unlock(&mutex);
return build_status_pdu(payload, nof_bytes);
}
// if tx_window is full and retx_queue empty, retransmit next PDU to be ack'ed
if (tx_window.size() >= RLC_AM_WINDOW_SIZE && retx_queue.size() == 0) {
// make sure this SN is still in the Tx window
uint32_t retx_sn = vt_a;
while (tx_window[retx_sn].buf == NULL) {
retx_sn++;
}
rlc_amd_retx_t retx;
retx.is_segment = false;
retx.so_start = 0;
retx.so_end = tx_window[retx_sn].buf->N_bytes;
retx.sn = retx_sn;
retx_queue.push_back(retx);
}
// RETX if required
if(retx_queue.size() > 0) {
int ret = build_retx_pdu(payload, nof_bytes);