On Fri, Feb 25, 2011 at 4:02 AM, Thomas Andrews <tandr...@grok.co.za> wrote:
> Hi,
>
> Is DELAYED-BA implemented?
>
> I get this error when I try to use it:
>
> "Driver does not support configured HT capability [DELAYED-BA]"
>
> I have the following versions installed:
>
> Linux atom 2.6.35-22-generic-pae #33-Ubuntu SMP Sun Sep 19 22:14:14 UTC
> 2010 i686 GNU/Linux
> hostapd 1:0.6.10-2
> wpasupplicant 0.6.10-2
> iw 0.9.19-1
>
> This is my hostapd.conf:
>
> 8<---------------------------------------------------------
> interface=wlan0
> driver=nl80211
> ssid=test_network
> channel=36
> hw_mode=a
> auth_algs=1
> wpa=3
> wpa_passphrase=foobar
> wpa_key_mgmt=WPA-PSK
> wpa_pairwise=TKIP CCMP
> rsn_pairwise=CCMP
> wme_enabled=1
> ieee80211n=1
> ht_capab=[HT40+][SHORT-GI-40][MAX-AMSDU-4000][DELAYED-BA]
> country_code=US
> wmm_enabled=1
> wmm_ac_bk_cwmin=4
> wmm_ac_bk_cwmax=10
> wmm_ac_bk_aifs=7
> wmm_ac_bk_txop_limit=0
> wmm_ac_bk_acm=0
> wmm_ac_be_aifs=3
> wmm_ac_be_cwmin=4
> wmm_ac_be_cwmax=10
> wmm_ac_be_txop_limit=0
> wmm_ac_be_acm=0
> wmm_ac_vi_aifs=2
> wmm_ac_vi_cwmin=3
> wmm_ac_vi_cwmax=4
> wmm_ac_vi_txop_limit=94
> wmm_ac_vi_acm=0
> wmm_ac_vo_aifs=2
> wmm_ac_vo_cwmin=2
> wmm_ac_vo_cwmax=3
> wmm_ac_vo_txop_limit=47
> wmm_ac_vo_acm=0
> 8<---------------------------------------------------------
>
> Many thanks,
> Thomas
Check the output of iw list. You'll see something like this:
Capabilities: 0x11ef
RX LDPC
HT20/HT40
SM Power Save disabled
RX HT20 SGI
RX HT40 SGI
TX STBC
RX STBC 1-stream
Max AMSDU length: 3839 bytes
DSSS/CCK HT40
If you don't see "HT Delayed Block Ack", then no. Also, your max
AMSDU size may exceed what the driver/hardware is capable of.
-Brian
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