pespin has uploaded this change for review. (
https://gerrit.osmocom.org/c/osmo-pcu/+/33455 )
Change subject: tbf_dl_fsm: Ignore DL_ACKNACK_MISS events in
WAIT_{RELEASE,REUSE_TFI} states
......................................................................
tbf_dl_fsm: Ignore DL_ACKNACK_MISS events in WAIT_{RELEASE,REUSE_TFI} states
If in those states, we already left the FINISHED step which means we
already received a FinalACk previously, hence it means we are missing
requested retransmissions of the last DL ACK/NACK due to fn-advance
(several DL blocks in transit before receiving UL response).
Change-Id: Ib0f23a9cc3c614fe428b682e01502930cd2e478f
---
M src/tbf_dl_fsm.c
1 file changed, 25 insertions(+), 0 deletions(-)
git pull ssh://gerrit.osmocom.org:29418/osmo-pcu refs/changes/55/33455/1
diff --git a/src/tbf_dl_fsm.c b/src/tbf_dl_fsm.c
index 557fb7a..3a963ce 100644
--- a/src/tbf_dl_fsm.c
+++ b/src/tbf_dl_fsm.c
@@ -286,6 +286,11 @@
case TBF_EV_FINAL_ACK_RECVD:
/* ignore, duplicate ACK, we already know about since we left
ST_FINISHED */
break;
+ case TBF_EV_DL_ACKNACK_MISS:
+ /* ignore, miss for retransmitted ACK, but a previous one was
+ * already ACKED since we left ST_FINISHED. This happens due to
+ * fn-advance scheduling several DL blocks in advance. */
+ break;
default:
OSMO_ASSERT(0);
}
@@ -320,6 +325,10 @@
case TBF_EV_FINAL_ACK_RECVD:
/* ignore, duplicate ACK, we already know about since we left
ST_FINISHED */
break;
+ case TBF_EV_DL_ACKNACK_MISS:
+ /* ignore, miss for retransmitted ACK, but a previous one was
+ * already ACKED since we left ST_FINISHED. This happens due to
+ * fn-advance scheduling several DL blocks in advance. */
default:
OSMO_ASSERT(0);
}
@@ -450,6 +459,7 @@
},
[TBF_ST_WAIT_RELEASE] = {
.in_event_mask =
+ X(TBF_EV_DL_ACKNACK_MISS) |
X(TBF_EV_FINAL_ACK_RECVD) |
X(TBF_EV_MAX_N3105),
.out_state_mask =
@@ -461,6 +471,7 @@
},
[TBF_ST_WAIT_REUSE_TFI] = {
.in_event_mask =
+ X(TBF_EV_DL_ACKNACK_MISS) |
X(TBF_EV_FINAL_ACK_RECVD),
.out_state_mask =
X(TBF_ST_RELEASING),
--
To view, visit https://gerrit.osmocom.org/c/osmo-pcu/+/33455
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Gerrit-Project: osmo-pcu
Gerrit-Branch: master
Gerrit-Change-Id: Ib0f23a9cc3c614fe428b682e01502930cd2e478f
Gerrit-Change-Number: 33455
Gerrit-PatchSet: 1
Gerrit-Owner: pespin <[email protected]>
Gerrit-MessageType: newchange
