From mboxrd@z Thu Jan  1 00:00:00 1970
From: Baldomero Coll <baldo.ath9k@gmail.com>
Date: Thu, 10 Feb 2011 13:04:15 +0100
Subject: [ath9k-devel] Progress on Ath9k HT support on Adhoc mode
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Hi all,

I'm also testing the patch Alex and Benoit have released for the community.
After configuring my IBSS network, the station dump command shows this [1].
As you can see, although the IBSS network has been created in HT mode, one
link doesn't seem to support MCS rates.
I would like to know if it is possible to force the MCS scheme. I don't know
why the "NL80211_TXRATE_MCS" parameter is not defined in the bitrates.c
(iw), or what I have to do to enable it.

I also wonder what rate control mechanism is been used in HT mode (minstrel
HT?), and whether such mechanism switches to non HT rates when the channel
quality is bad.

I have been using wireshark to capture data transmissions between 2 PCs
configured in IBSS HT mode. What I see in the radiotap header is that no HT
information is available (protocol, data rate). Do you know how the HT
information can be added to the ratiotap header?

Thanks for your help
Baldo


[1]
----------------------------------------------------------------------------------------------------------------------------------------
sudo iw dev wlan0 station dump
Station xx:xx:xx:xx:xx:xx (on wlan0)
    inactive time:    8392 ms
    rx bytes:    2476336
    rx packets:    2149
    tx bytes:    433552
    tx packets:    1228
    tx retries:    564
    tx failed:    0
    signal:      -27 dBm
    signal avg:    -28 dBm
    tx bitrate:    270.0 MBit/s MCS 14 40Mhz short GI
Station xx:xx:xx:xx:xx:xx (on wlan0)
    inactive time:    200 ms
    rx bytes:    27577
    rx packets:    434
    tx bytes:    803
    tx packets:    8
    tx retries:    2
    tx failed:    0
    signal:      -26 dBm
    signal avg:    -26 dBm
    tx bitrate:    6.5 MBit/s MCS 0
Station xx:xx:xx:xx:xx:xx (on wlan0)
    inactive time:    96 ms
    rx bytes:    692528
    rx packets:    18938
    tx bytes:    2979324
    tx packets:    2001
    tx retries:    3340
    tx failed:    0
    signal:      -33 dBm
    signal avg:    -33 dBm
    tx bitrate:    54.0 MBit/s
----------------------------------------------------------------------------------------------------------------------------------------
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