Change in osmo-pcu[master]: Tx ul ack/nack: Avoid sending invalid/unknown TLLI

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pespin gerrit-no-reply at lists.osmocom.org
Tue May 11 12:17:07 UTC 2021


pespin has posted comments on this change. ( https://gerrit.osmocom.org/c/osmo-pcu/+/24201 )

Change subject: Tx ul ack/nack: Avoid sending invalid/unknown TLLI
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Patch Set 1:

(1 comment)

https://gerrit.osmocom.org/c/osmo-pcu/+/24201/1//COMMIT_MSG 
Commit Message:

https://gerrit.osmocom.org/c/osmo-pcu/+/24201/1//COMMIT_MSG@10 
PS1, Line 10: contention resolution
> Ok, I see. […]
I checked the specs before submitting the patch and I don't see it is actually wrong acking/nacking them. What's wrong is of course submitting a TLLI=0xffffff (invalid). Specs detail that contentiuon resolution on the MS side fails if it receives a UL ACK/NACK with an incorrect/different TLLI, so it's implicitly fine receiving UL ACK/NACK without TLLI for a while (MS has a N couner and a T timer to trigger failure if it doesn't receive the TLLI in a while).



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Gerrit-Project: osmo-pcu
Gerrit-Branch: master
Gerrit-Change-Id: Ibae5df6cfbb56f8f8007cb9fec9c29006d673b72
Gerrit-Change-Number: 24201
Gerrit-PatchSet: 1
Gerrit-Owner: pespin <pespin at sysmocom.de>
Gerrit-Reviewer: Jenkins Builder
Gerrit-Reviewer: fixeria <vyanitskiy at sysmocom.de>
Gerrit-Comment-Date: Tue, 11 May 2021 12:17:07 +0000
Gerrit-HasComments: Yes
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Comment-In-Reply-To: fixeria <vyanitskiy at sysmocom.de>
Comment-In-Reply-To: pespin <pespin at sysmocom.de>
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