<div dir="ltr">Hi every one,<div><br></div><div> I need to make Wi-Fi connections between my device and I require a high throughput. I mainly target IBSS network. For IBSS, I'm using wpa_supplicant with USB dongle Asus N53 (RT3572, here is my configuration file:</div>
<div><br></div><div>ap_scan=2</div><div>network={</div><div> scan_ssid=1</div><div> ssid="MySsid"</div><div> frequency=5200</div><div> mode=1</div><div> key_mgmt=WPA-NONE</div><div> proto=WPA</div>
<div> psk="MyKey"</div><div> pairwise=NONE</div><div> group=CCMP</div><div> htmode=HT40-</div><div>}</div><div><br></div><div>The maximum throughput I can reach is about 22Mbps (iperf TCP between 2 devices 2 meters away).</div>
<div><br></div><div>"iw wlan0 station dump" indicates the maximum physical rate used is 150Mbps (MCS 7 short GI, HT40), about 8% reties, to failure. So I understand MIMO is not enable.</div><div><br></div><div><b>So first question, how to enable MIMO with IBSS?</b></div>
<div><br></div><div>Also I think with 150Mbps, <b>the TCP throughput should be about 70Mbps, isn't it?</b></div><div><br></div><div>I have also check the STA - AP configuration. It used MCS larger that 7 so it enables MIMO, but the throughput is terrible less then 10Mbps.</div>
<div><br></div><div>For information, STA - AP configuration with Windows (using Asus tools) obtain a TCP throughput of 115Mps with the same Wi-Fi hardware. By the way I couldn't succeed to authenticate a linux station to the windows AP... (authenticate timed out after sending 3 direct probe. Same result with or without ciphering).</div>
<div><b>Do you know why there is such a different throughput between linux / windows? (Drivers? tools?)</b></div><div><b>Do you know why a wpa_supplicant can not attache to the windows AP?</b></div><div><b><br></b></div><div>
<b>Also I would like to know what throughput you are able to reach in same condition?</b></div><div><b><br></b></div><div> Thank you if you can give me some answers or hints to solve my problems ;)</div><div><br></div><div>
Alban</div></div>