<div dir="ltr">Dear Dave Taht,<div><br></div><div>Thank you for pointing out those two great papers and paying attention to our recent work. </div><div><br></div><div>In the context of wearable networking where the bottleneck is the Bluetooth link between the smartphone and the smartwatch, the solutions you mentioned can conceptually help to handle bottleneck queuing at lower layers, but it could be hard to execute them given the Bluetooth stack in Android is very different from that of WiFi/LTE and does not speak TCP/IP. </div><div><br></div><div>In our future bufferbloat-related work, we will definitely discuss more related works, especially those you mentioned. </div><div><br></div><div><br></div><div>Best,</div><div>Xiao</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, Apr 6, 2019 at 8:14 PM Dave Taht <<a href="mailto:dave.taht@gmail.com" target="_blank">dave.taht@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">"When acting as a gateway proxy for a wearable, the phone dramatically<br>
inflates the end-to-end (server to wearable) latency to 30+ seconds<br>
due to its incurred “bufferbloat”. We then break down the end-to-end<br>
latency into various components, and identify the root cause to be the<br>
phone-side TCP receive buffer, whose configuration does not take into<br>
account the path asymmetry between the wearable-phone path and the<br>
phone-server path... " -<br>
<a href="https://anikravesh.github.io/files/wearos-sigmetrics19.pdf" rel="noreferrer" target="_blank">https://anikravesh.github.io/files/wearos-sigmetrics19.pdf</a><br>
<br>
I am of course puzzled as to why they didn't look into sch_cake[1] or<br>
fq_codel derived solutions[2], (it is a non-open source OS) but they<br>
did manage to eliminate 97% of the problem in their paper, so, there's<br>
that.<br>
<br>
[1] <a href="https://arxiv.org/abs/1804.07617" rel="noreferrer" target="_blank">https://arxiv.org/abs/1804.07617</a><br>
[2] <a href="https://www.usenix.org/system/files/conference/atc17/atc17-hoiland-jorgensen.pdf" rel="noreferrer" target="_blank">https://www.usenix.org/system/files/conference/atc17/atc17-hoiland-jorgensen.pdf</a><br>
-- <br>
<br>
Dave Täht<br>
CTO, TekLibre, LLC<br>
<a href="http://www.teklibre.com" rel="noreferrer" target="_blank">http://www.teklibre.com</a><br>
Tel: 1-831-205-9740<br>
</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail-m_6508380898665103736gmail-m_-8686316740224556310gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div><font face="verdana, sans-serif" size="1" color="#666666">Xiao (Shawn) Zhu<br></font></div><div><font face="verdana, sans-serif" size="1" color="#666666">PhD Candidate, Computer Science & Engineering</font></div><div><font face="verdana, sans-serif" size="1"><font color="#666666">University of Michigan, </font><span style="color:rgb(102,102,102)">Ann Arbor, MI 48105</span></font></div><div><font face="verdana, sans-serif" size="1" color="#666666">Email: <a href="mailto:shawnzhu@umich.edu" target="_blank">shawnzhu@umich.edu</a></font></div><div><font face="verdana, sans-serif" size="1" color="#666666">Phone: <a href="tel:734-263-0338" value="+17349267562" target="_blank">734-263-0338</a></font></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div>