Bug 2113

Summary:	LTE RLC AM: all status reports include no more than one NACK.
Product:	ns-3	Reporter:	Vladimir Ivanov <ivanov.vladimir>
Component:	lte	Assignee:	Manuel Requena <manuel.requena>
Status:	NEEDINFO ---
Severity:	normal	CC:	bbojovic, ns-bugs
Priority:	P3
Version:	pre-release
Hardware:	PC
OS:	Linux

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

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 EDT

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 EDT

Hi Vladimir,

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