fixeria has posted comments on this change. ( 
https://gerrit.osmocom.org/c/osmo-ttcn3-hacks/+/18187 )

Change subject: PCU: introduce a new test case TC_dl_flow_more_blocks
......................................................................


Patch Set 1:

(2 comments)

https://gerrit.osmocom.org/c/osmo-ttcn3-hacks/+/18187/1/pcu/PCU_Tests.ttcn
File pcu/PCU_Tests.ttcn:

https://gerrit.osmocom.org/c/osmo-ttcn3-hacks/+/18187/1/pcu/PCU_Tests.ttcn@1644
PS1, Line 1644:         ack_nack_desc.receive_block_bitmap[63] := '1'B;
> No use of f_acknackdesc_ack_block() here?
ACK, thanks!


https://gerrit.osmocom.org/c/osmo-ttcn3-hacks/+/18187/1/pcu/PCU_Tests.ttcn@1679
PS1, Line 1679:         // f_rx_rlcmac_dl_block(dl_block, fn);
> a data block? good question.
I think I figured it out. This happens if Packet Downlink Ack/Nack we're 
sending has final_ack bit set to '0'B. The MS determines whether to set this 
bit by looking at FBI [1] of the last block received within the current RRBP. 
The problem is that in this scenario the SGSN sends blocks not all at once, but 
during the whole RRBP period, so the PCU cannot know in advance which block is 
the last one.

[1] Final Block Indication, not Federal Bureau of Investigation ;)



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Gerrit-Project: osmo-ttcn3-hacks
Gerrit-Branch: master
Gerrit-Change-Id: I45edbc943194c15b084eb04dda390db75b4bfa0f
Gerrit-Change-Number: 18187
Gerrit-PatchSet: 1
Gerrit-Owner: fixeria <axilira...@gmail.com>
Gerrit-Reviewer: Jenkins Builder
Gerrit-Reviewer: fixeria <axilira...@gmail.com>
Gerrit-Reviewer: pespin <pes...@sysmocom.de>
Gerrit-Comment-Date: Mon, 11 May 2020 06:43:10 +0000
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Comment-In-Reply-To: pespin <pes...@sysmocom.de>
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