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srsLTE
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check expiration of poll_retx_timer and schedule retx if needed

This commit is contained in:
Andre Puschmann 2018-03-06 12:26:49 +01:00
parent 5a8454f5a8
commit add125a01f
1 changed files with 22 additions and 1 deletions
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23
lib/src/upper/rlc_am.cc
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@ -198,7 +198,7 @@ uint32_t rlc_am::get_bearer()
void rlc_am::write_sdu(byte_buffer_t *sdu)
{
tx_sdu_queue.write(sdu);
log->info_hex(sdu->msg, sdu->N_bytes, "%s Tx SDU, tx_sdu_len=%d", rrc->get_rb_name(lcid).c_str(), tx_sdu_queue.size());
log->info_hex(sdu->msg, sdu->N_bytes, "%s Tx SDU, tx_sdu_queue_len=%d", rrc->get_rb_name(lcid).c_str(), tx_sdu_queue.size());
}
/****************************************************************************
@ -273,6 +273,27 @@ uint32_t rlc_am::get_buffer_state()
goto unlock_and_return;
}
// check if pollRetx timer expired (Section 5.2.2.3 in TS 36.322)
if (poll_retx()) {
// if both tx and retx buffer are empty, retransmit next PDU to be ack'ed
log->info("Poll reTx timer expired (lcid=%d)\n", lcid);
if ((tx_window.size() > 0 && retx_queue.size() == 0 && tx_sdu_queue.size() == 0)) {
std::map<uint32_t, rlc_amd_tx_pdu_t>::iterator it = tx_window.find(vt_s - 1);
if (it != tx_window.end()) {
log->info("Schedule last PDU (SN=%d) for reTx.\n", vt_s - 1);
rlc_amd_retx_t retx;
retx.is_segment = false;
retx.so_start = 0;
retx.so_end = tx_window[vt_s - 1].buf->N_bytes;
retx.sn = vt_s - 1;
retx_queue.push_back(retx);
} else {
log->error("Found invalid PDU in tx_window.\n");
}
poll_retx_timeout.start(cfg.t_poll_retx);
}
}
// Bytes needed for retx
if(retx_queue.size() > 0) {
rlc_amd_retx_t retx = retx_queue.front();