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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Hi all,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I have read the CUBIC draft and have seen the extensive simulations
and experimental results related to CUBIC on the authors’ pages. Here are
my comments and suggestions about it.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>The language of the CUBIC draft is simple and clear. The draft
almost completely follows the guidelines for specifying the new congestion
control algorithms [RFC 5033]. The CUBIC protocol can be considered safe for
deployment as it does not perform worse than TCP in difficult environments like
wireless networks. I believe it should be published as an experimental RFC. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I have a few suggestions that may possibly improve the
quality of the draft.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>- The draft must include an explanation on why
the value of C (the CUBIC parameter) is taken equal to 0.4. The CUBIC paper
does not discuss it either.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>- Regarding RTT-fairness among CUBIC flows, the
explanation must be clear and consistent throughout the document. It must be
clearly specified that the CUBIC flows are only RTT-fair when they have same
RTT and by taking some time for convergence to fair share otherwise the CUBIC
flows have their bandwidth shares linearly proportional to the inverse of their
RTT ratio.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>- The authors must explain in the draft about
the assumption, “we believe that under wired Internet, use of the linear
share notion seems more reasonable than equal share or a higher order shares”.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Best Regards<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span style='font-size:9.0pt;
font-family:Arial'>Kashif Munir</span></font><font size=1><span
style='font-size:9.0pt'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span style='font-size:9.0pt;
font-family:Arial'>-------------------</span></font><font size=1><span
style='font-size:9.0pt'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span style='font-size:9.0pt;
font-family:Arial'>PhD Candidate<br>
Institute of Computer Science<br>
University of Innsbruck, Austria<br>
</span></font><font size=2 face=Arial><span style='font-size:10.0pt;font-family:
Arial'>Homepage: <a href="http://dps.uibk.ac.at/~kashif/">http://dps.uibk.ac.at/~kashif/</a></span></font><font
size=2><span style='font-size:11.0pt'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=1 face=Arial><span style='font-size:9.0pt;
font-family:Arial'><br>
<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> </span></font><font size=2 face=Calibri><span style='font-size:
11.0pt;font-family:Calibri'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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