<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
</head>
<body text="#000000" bgcolor="#FFFFFF">
<font face="Times New Roman, Times, serif">Hi all,<br>
<br>
Dave Täht suggested that I post the discussion we've started to
this broader group.<br>
<br>
I've been spending the past few months trying to develop methods
to verify one of the key promises of OFDMA; improved efficiency.<br>
The tests have mostly focused on trying to see improvement in
total throughput using various traffic mixes using four OFDMA
STAs.<br>
<br>
I've been using Samsung S10e's as STAs and primarily iperf3 TCP/IP
and UDP traffic. I did some work with the Intel AX200 as a STA
using both Windows 10 and Linux for RvR testing and found the
Linux driver basically broken for uplink. (See the Win10/Linux
comparison in the RAX40 section of
<a class="moz-txt-link-freetext" href="https://www.smallnetbuilder.com/wireless/wireless-reviews/33220-wi-fi-6-performance-roundup-five-routers-tested?start=1">https://www.smallnetbuilder.com/wireless/wireless-reviews/33220-wi-fi-6-performance-roundup-five-routers-tested?start=1</a><br>
So, for now, I'm limited to using the Samsung S10 as STAs. <br>
<br>
ANYWAY, I haven't been having much luck finding total throughput
gains, so thought I'd bang my head against a different wall for
awhile, which brings me to latency. <br>
</font><br>
<font face="Times New Roman, Times, serif"><font face="Times New
Roman, Times, serif"><font size="-1" face="Times New Roman,
Times, serif"><font size="-1" face="Times New Roman, Times,
serif">My initial work was pretty simple, just running pings
to four OFDMA STAs with OFDMA on/off on the AP, which showed
no improvement. That's once I realized the large ping times
and variation I was seeing initially was due to aggressive
power-save kicking in on the STAs with no traffic running.
So I also tried various TCP rates starting at 1 Mbps per STA
to keep the STA awake.<br>
<br>
</font></font></font></font><font face="Times New Roman,
Times, serif"><font face="Times New Roman, Times, serif"><font
size="-1" face="Times New Roman, Times, serif"><font size="-1"
face="Times New Roman, Times, serif"><font face="Times New
Roman, Times, serif">Coincidentally, Dave reached out the
other day and suggested I look at the toolsets used for
the make-wifi-fast project. </font><font face="Times New
Roman, Times, serif"><font size="-1" face="Times New
Roman, Times, serif"><br>
<br>
I've spent a few hours looking at the flent and rrul
sites and </font></font></font></font></font></font><font
face="Times New Roman, Times, serif"><font face="Times New Roman,
Times, serif"><font size="-1" face="Times New Roman, Times,
serif"><font size="-1" face="Times New Roman, Times, serif"><font
face="Times New Roman, Times, serif"><font size="-1"
face="Times New Roman, Times, serif"><font face="Times
New Roman, Times, serif"><font size="-1" face="Times
New Roman, Times, serif">I'm interested in exploring
using the tools/techniques used for the
make-wifi-fast work to date to see if AX adds
anything to the latency improvement party. If
anyone is willing to provide some pointers on the
proper use of the tools, I'd appreciate it.</font></font><br>
<br>
For example, I didn't see mention of the bitrates used
for the traffic streams in the tests. Do I just tell
each stream to run full blast (1 Gbps)?</font></font></font></font></font><br>
</font><br>
<font face="Times New Roman, Times, serif"><font size="-1"
face="Times New Roman, Times, serif"><font size="-1" face="Times
New Roman, Times, serif">Also, since most implementations of
(consumer at least) OFDMA require multiple STAs to trigger
OFDMA frames, I could use some help understanding whether
multiple streams should be applied per STA, or spread among
the 4 STAs I'm using in my testing.<br>
<br>
Also (2), has anyone used Android STAs for make-wifi-fast
testing?<br>
<br>
Anyway, thanks for reading. I look forward to any advice the
group can provide.<br>
<br>
Tim Higgins<br>
SmallNetBuilder.com<br>
</font></font></font>
</body>
</html>