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gNB: make checks for missed feedbacks more robust w.r.t. frame number warp-around in find_harq()

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Thomas Schlichter
2024-06-03 11:54:55 +02:00
parent 6b01cfb8e2
commit 0ce0282238
1 changed files with 4 additions and 2 deletions
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openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_uci.c
+4 -2
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@@ -977,7 +977,7 @@ static NR_UE_harq_t *find_harq(frame_t frame, sub_frame_t slot, NR_UE_info_t * U
return NULL;
NR_UE_harq_t *harq = &sched_ctrl->harq_processes[pid];
/* old feedbacks we missed: mark for retransmission */
while (harq->feedback_frame != frame
while ((harq->feedback_frame - frame + 1024 ) % 1024 > 512 // harq->feedback_frame < frame, distance of 512 is boundary to decide if feedback_frame is in the past or future
|| (harq->feedback_frame == frame && harq->feedback_slot < slot)) {
LOG_W(NR_MAC,
"UE %04x expected HARQ pid %d feedback at %4d.%2d, but is at %4d.%2d instead (HARQ feedback is in the past)\n",
@@ -995,7 +995,9 @@ static NR_UE_harq_t *find_harq(frame_t frame, sub_frame_t slot, NR_UE_info_t * U
harq = &sched_ctrl->harq_processes[pid];
}
/* feedbacks that we wait for in the future: don't do anything */
if (harq->feedback_slot > slot) {
if ((frame - harq->feedback_frame + 1024 ) % 1024 > 512 // harq->feedback_frame > frame, distance of 512 is boundary to decide if feedback_frame is in the past or future
|| (harq->feedback_frame == frame && harq->feedback_slot > slot)) {
LOG_W(NR_MAC,
"UE %04x expected HARQ pid %d feedback at %4d.%2d, but is at %4d.%2d instead (HARQ feedback is in the future)\n",
UE->rnti,