Bug 2113 – LTE RLC AM: all status reports include no more than one NACK.

Bug 2113 - LTE RLC AM: all status reports include no more than one NACK.


Summary:	LTE RLC AM: all status reports include no more than one NACK.

Status:	NEEDINFO

Product:	ns-3
Classification:	Unclassified
Component:	lte
Version:	pre-release
Hardware:	PC Linux

Importance:	P3 normal
Assigned To:	Manuel Requena

URL:
Keywords:

Depends on:
Blocks:
	Show dependency tree / graph

Reported:	2015-05-05 06:18 UTC by Vladimir Ivanov
Modified:	2018-06-04 07:10 UTC (History)
CC List:	2 users (show)

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Description Vladimir Ivanov 2015-05-05 06:18:13 UTC

Hi all,

I inspected code for LTE model, nearly merged into the main repository. In code src/lte/model/lte-rlc-am.cc, the number of bytes allocated for a RLC AM status report is controlled by variable m_statusPduBufferSize, the value of this variable in also used in src/lte/model/lte-ue-mac.cc for the purpose of Logical Channel Prioritization (corresponding lines in lte-rlc-am.cc are 1580-1608). However, in some cases m_statusPduBufferSize takes value of 4 (the reception of a poll bit, line 820 in lte-rlc-am.cc), in other cases m_statusPduBufferSize does not change at all (for instance, the expiry of t-Reordering). As a result, a transport block for a status repost may not be allocated, or can contain no more than one NACK.

Best regards,
Vladimir.

Comment 1 Nicola Baldo 2015-05-07 06:53:45 UTC

Thanks Vladimir for reporting this bug! 
Do you have any suggestion for how to fix it?

Comment 2 Manuel Requena 2018-06-04 07:09:54 UTC

Hi Vladimir,

Your description is not clear.
Please, could you send an example to reproduce the issue?
Thanks