Hi Lars,<div><br></div><div>This is very interesting study! it provides many useful information for the TCP research at Google.</div><div><br></div><div>The queuing and processing delays on slide 12 (or figure 9 in the paper) are mostly <50ms, but the following paper</div>
<div>"Characterizing residential broadband networks" published in IMC 2007 measures much higher queuing length ranging from 100ms to a few secs (<a href="http://portal.acm.org/citation.cfm?id=1298306.1298313">http://portal.acm.org/citation.cfm?id=1298306.1298313</a> figure 13).</div>
<meta http-equiv="content-type" content="text/html; charset=utf-8"><div><br>Any idea about the differences?</div><div><br></div><div>Thanks,</div><div><br></div><div>Yuchung</div><div><br><div class="gmail_quote">On Fri, Jul 9, 2010 at 12:15 AM, Lars Eggert <span dir="ltr"><<a href="mailto:lars.eggert@nokia.com">lars.eggert@nokia.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">Hi,<br>
<br>
a quick status update. We now have received over 100 donated home gateways, plus a DSLAM. The students are on their summer break, after which we'll start running a significantly expanded set of tests over this much larger population of devices.<br>
<br>
Many of yo have donated boxes and suggested more experiments and better ways of performing our current tests - thank you!<br>
<br>
In case you are attending IETF-78 in Maastricht and would like to donate a home gateway, simply bring it. (Or contact me now for shipping details; no cost to you.)<br>
<br>
We're especially interested in devices from outside the EU and North America, or any other model we may not have yet (see <a href="http://fit.nokia.com/lars/tmp/2010-hgw-study-devices.txt" target="_blank">http://fit.nokia.com/lars/tmp/2010-hgw-study-devices.txt</a>). And we're still lacking a CMTS for testing cable modems...<br>
<br>
See you in Maastricht,<br>
Lars<br>
<br>
On 2010-6-2, at 18:36, Lars Eggert wrote:<br>
> Hi,<br>
><br>
> FYI, a first report with test results for 34 devices is available at <a href="http://fit.nokia.com/lars/tmp/2010-hgw-study.pdf" target="_blank">http://fit.nokia.com/lars/tmp/2010-hgw-study.pdf</a>. Slides that summarize the results are at <a href="http://fit.nokia.com/lars/tmp/2010-hgw-study-slides.pdf" target="_blank">http://fit.nokia.com/lars/tmp/2010-hgw-study-slides.pdf</a>.<br>
><br>
> We have received another 30-odd devices as donations, which we'll add to the testbed and include in a follow-up study.<br>
><br>
> If you have an unused, spare home gateway to donate to this effort, please contact us at <a href="mailto:nat-study@fit.nokia.com">nat-study@fit.nokia.com</a>. We're also interested in obtaining a DSLAM and a CMTS.<br>
><br>
> Thanks,<br>
> Lars<br>
><br>
> On 2010-4-29, at 12:34, Lars Eggert wrote:<br>
>> Hi,<br>
>><br>
>> for a measurement study done together with Markku Kojo's team at the University of Helsinki, we're looking to collect as many different NAT home routers as possible. If you have an old clunker lying around somewhere, please contact me off-list. I'll cover shipping via DHL. Feel free to forward this email as you see fit.<br>
>><br>
>> The boxes will find a permanent home at the University of Helsinki. Study results will be published openly. The intent is that this collection become a resource for the community to be shared for future studies.<br>
>><br>
>> Caveat: The boxes should NAT between Ethernet interfaces - we don't have DSL or cable access equipment in the lab setup at the moment.<br>
>><br>
>> Thanks,<br>
>> Lars<br>
><br>
<br>
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<br></blockquote></div><br></div>