[ath9k-devel] Linksys WPC300N Wireless-N Notebook Adapter

[ath9k-devel] Linksys WPC300N Wireless-N Notebook Adapter

[hong zhang]

Luis,

1. Does ath9k Tx/Rx buffer packets for power save purpose?
2. Do TX power and signal level display go same path to mac80211
   through rate control interface? I think iw dev wlan0 station should   
   display Tx power and signal level as well.

 
---henry

--- On Mon, 5/18/09, Luis R. Rodriguez <lrodriguez@atheros.com> wrote:

> From: Luis R. Rodriguez <lrodriguez@atheros.com>
> Subject: Re: [ath9k-devel] Linksys WPC300N Wireless-N Notebook Adapter
> To: "hong zhang" <henryzhang62@yahoo.com>
> Cc: "Luis R. Rodriguez" <mcgrof@gmail.com>, "ath9k-devel at lists.ath9k.org" <ath9k-devel@lists.ath9k.org>
> Date: Monday, May 18, 2009, 10:41 AM
> On Sat, May 16, 2009 at 10:51:57PM
> -0700, hong zhang wrote:
> > 
> > Luis,
> > 
> > Have you experience XJperf (windows graphic version
> iperf) to measure UDP/TCP throughput? I think it does not
> work properly because UDP throughput is always 1Mbites/s.
> 
> No, thanfully I don't have a windows box anywhere near my
> home or office,
> that's just a serious security risk. But I see xjperf runs
> in Linux, I'll give
> it a shot some time.
> 
> > Also, does "iw dev ath0 station dump" display bit rate
> (I have not tested my WPC300N yet)?
> 
> Right now ath9k does not report the proper 11n rate, that
> work needs a
> decent rewrite on rate handling in ath9k. For now please
> use the ath9k
> debugfs file, rcstat. That'll show you counters for every
> MCS rate.
> 
> ? Luis
> 


      

[ath9k-devel] Linksys WPC300N Wireless-N Notebook Adapter

[Luis R. Rodriguez]

On Mon, May 18, 2009 at 09:36:43AM -0700, hong zhang wrote:
> 
> Luis,
> 
> 1. Does ath9k Tx/Rx buffer packets for power save purpose?

You mean in AP mode? If you are on a kernel >= 2.6.29 yes. That is
even if you are using compat-wireless you need at least 2.6.29 still.

> 2. Do TX power and signal level display go same path to mac80211
>    through rate control interface?

I don't understand your question.

> I think iw dev wlan0 station should
>    display Tx power and signal level as well.

'iw dev wlan0 station dump' does display signal. I get:

mcgrof at tesla ~ $ iw dev wlan2 station dump
Station 00:0b:85:5b:8d:6c (on wlan2)
        inactive time:  22628 ms
        rx bytes:       3042422
        rx packets:     13165
        tx bytes:       177786
        tx packets:     947
        signal:         -30 dBm
        tx bitrate:     54.0 MBit/s


Keep in mind wireless extensions added a 'quality' term which
unfortunately was used differently between drivers. What we add to
nl80211 should remain consistant accross drivers and it should be
defined properly. If there is some enhancement to this reporting which
you can think of please feel free to address this on linux-wireless
with your recommendation. The next best thing we have to report
signal would be through using the RCPI concept [1], but note that it
specifically defines it as "the received RF power in the channel measured
over the entire received frame or by other equivalent means which meet the
specified accuracy". The last part is a little vague, that of
"or by other equivalent means which meet the specified accuracy" and
its questionable whether or not all devices support this. Anyway
this could just be used by userspace and nl80211 should not have to know
about this except maybe whether or not the device claims to support
this accuracy terminology, I am also not sure what the status of 802.11k
is which the group working on this, so it may be premature to just add
it to nl80211/cfg80211.

[1] http://www.spinics.net/lists/netdev/msg12028.html

Patches are welcomed to add tx power displaying, not sure why we didn't
add that.

  Luis

> 
> 
> ---henry
> 
> --- On Mon, 5/18/09, Luis R. Rodriguez <lrodriguez@atheros.com> wrote:
> 
> > From: Luis R. Rodriguez <lrodriguez@atheros.com>
> > Subject: Re: [ath9k-devel] Linksys WPC300N Wireless-N Notebook Adapter
> > To: "hong zhang" <henryzhang62@yahoo.com>
> > Cc: "Luis R. Rodriguez" <mcgrof@gmail.com>, "ath9k-devel at lists.ath9k.org" <ath9k-devel@lists.ath9k.org>
> > Date: Monday, May 18, 2009, 10:41 AM
> > On Sat, May 16, 2009 at 10:51:57PM
> > -0700, hong zhang wrote:
> > >
> > > Luis,
> > >
> > > Have you experience XJperf (windows graphic version
> > iperf) to measure UDP/TCP throughput? I think it does not
> > work properly because UDP throughput is always 1Mbites/s.
> >
> > No, thanfully I don't have a windows box anywhere near my
> > home or office,
> > that's just a serious security risk. But I see xjperf runs
> > in Linux, I'll give
> > it a shot some time.
> >
> > > Also, does "iw dev ath0 station dump" display bit rate
> > (I have not tested my WPC300N yet)?
> >
> > Right now ath9k does not report the proper 11n rate, that
> > work needs a
> > decent rewrite on rate handling in ath9k. For now please
> > use the ath9k
> > debugfs file, rcstat. That'll show you counters for every
> > MCS rate.
> >
> >   Luis
> >
> 
> 
> 

[ath9k-devel] Linksys WPC300N Wireless-N Notebook Adapter

[Johannes Berg]

On Mon, 2009-05-18 at 10:33 -0700, Luis R. Rodriguez wrote:

> defined properly. If there is some enhancement to this reporting which
> you can think of please feel free to address this on linux-wireless
> with your recommendation. The next best thing we have to report
> signal would be through using the RCPI concept [1], but note that it
> specifically defines it as "the received RF power in the channel measured
> over the entire received frame or by other equivalent means which meet the
> specified accuracy". The last part is a little vague, that of
> "or by other equivalent means which meet the specified accuracy" and
> its questionable whether or not all devices support this. Anyway
> this could just be used by userspace and nl80211 should not have to know
> about this except maybe whether or not the device claims to support
> this accuracy terminology, I am also not sure what the status of 802.11k
> is which the group working on this, so it may be premature to just add
> it to nl80211/cfg80211.

I think that's a red herring -- dBm display should be good enough or
better than rcpi?

> Patches are welcomed to add tx power displaying, not sure why we didn't
> add that.

I don't think TX power is per station? We currently display max tx power
per channel -- which is also what we use if iwconfig (wext) is set to
auto and we don't have 11h info. But I'm not sure in what form we should
display this since it changes per channel etc.

johannes

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[ath9k-devel] Linksys WPC300N Wireless-N Notebook Adapter

[Luis R. Rodriguez]

On Mon, May 18, 2009 at 10:43 AM, Johannes Berg
<johannes@sipsolutions.net> wrote:
> On Mon, 2009-05-18 at 10:33 -0700, Luis R. Rodriguez wrote:
>
>> defined properly. If there is some enhancement to this reporting which
>> you can think of please feel free to address this on linux-wireless
>> with your recommendation. The next best thing we have to report
>> signal would be through using the RCPI concept [1], but note that it
>> specifically defines it as "the received RF power in the channel measured
>> over the entire received frame or by other equivalent means which meet the
>> specified accuracy". The last part is a little vague, that of
>> "or by other equivalent means which meet the specified accuracy" and
>> its questionable whether or not all devices support this. Anyway
>> this could just be used by userspace and nl80211 should not have to know
>> about this except maybe whether or not the device claims to support
>> this accuracy terminology, I am also not sure what the status of 802.11k
>> is which the group working on this, so it may be premature to just add
>> it to nl80211/cfg80211.
>
> I think that's a red herring -- dBm display should be good enough or
> better than rcpi?

Yeah I think for now its more than enough. Since we are reporting dBm
userspace could just parse this in terms of RCPI if it wanted to. RCPI
seems to require an actual accuracy and I don't think any vendor is
adhering to it yet.

>> Patches are welcomed to add tx power displaying, not sure why we didn't
>> add that.
>
> I don't think TX power is per station?

Oh true. Except unless the user users something like radiotap to
inject desired tx power for each station.

> We currently display max tx power
> per channel -- which is also what we use if iwconfig (wext) is set to
> auto and we don't have 11h info. But I'm not sure in what form we should
> display this since it changes per channel etc.

Fine by me. I suspect packet injection with radiotap and reporting the
last used tx power for a station would be used mostly by experimenters
and for that case a patch is welcomed but we'd then need to add this
to the station struct in mac80211 and keep track of it and export it.
Not sure if its worth it.

  Luis

[ath9k-devel] Linksys WPC300N Wireless-N Notebook Adapter

[hong zhang]

I tried WPC300nv1 in my laptop and shows "16:00.0 Network controller: Broadcom Corporation BCM43XG (rev 01)". 

V1 is on North American market.
V2 (Atheros based) is for Eroupean market.

My linux laptop could not detect WPC300Nv1.
 
--- On Tue, 5/26/09, Luis R. Rodriguez <lrodriguez@atheros.com> wrote:

> From: Luis R. Rodriguez <lrodriguez@atheros.com>
> Subject: Re: Linksys WPC300N Wireless-N Notebook Adapter
> To: "hong zhang" <henryzhang62@yahoo.com>
> Cc: "Luis Rodriguez" <Luis.Rodriguez@Atheros.com>, "ath9k-devel at lists.ath9k.org" <ath9k-devel@lists.ath9k.org>
> Date: Tuesday, May 26, 2009, 11:22 AM
> On Sat, May 23, 2009 at 12:16:46AM
> -0700, hong zhang wrote:
> > 
> > Luis,
> > 
> > I mail order an WPC300N v1 not v2. Is it supported by
> ath9k?
> > Vendor does not mention version and I assume it is
> v2.
> > I saw people compalained WPC300Nv1 was not linux
> compatible.
> > None of vendors mentions WPC300N version on web.
> > Is it true?
> 
> I'd search by FCC ID: PY307300073
> 
> My understanding v2 uses a Broadcom chipset.
> 
> ? Luis
> 


      

[ath9k-devel] Linksys WPC300N Wireless-N Notebook Adapter

[Luis R. Rodriguez]

On Tue, May 26, 2009 at 09:33:58AM -0700, hong zhang wrote:
> 
> I tried WPC300nv1 in my laptop and shows "16:00.0 Network controller: Broadcom Corporation BCM43XG (rev 01)".

If its Broadcom, good luck. Unfortunately vendors do not distinguish
which wireless chipset is on their products and sometimes they change
this. A few years ago I even saw one vendor keep the same PCI vendor:device
ID for two separate devices....

For wireless devices the best is to check and follow the FCC ID. Feel free
to add the right one here:

http://wireless.kernel.org/en/users/Drivers/ath9k

It may help other users.

  Luis

[ath9k-devel] Linksys WPC300N Wireless-N Notebook Adapter

[hong zhang]

Luis,

I mail order an WPC300N v1 not v2. Is it supported by ath9k?
Vendor does not mention version and I assume it is v2.
I saw people compalained WPC300Nv1 was not linux compatible.
None of vendors mentions WPC300N version on web.
Is it true?
 
---henry


      

[ath9k-devel] Linksys WPC300N Wireless-N Notebook Adapter

[Luis R. Rodriguez]

On Sat, May 23, 2009 at 12:16:46AM -0700, hong zhang wrote:
> 
> Luis,
> 
> I mail order an WPC300N v1 not v2. Is it supported by ath9k?
> Vendor does not mention version and I assume it is v2.
> I saw people compalained WPC300Nv1 was not linux compatible.
> None of vendors mentions WPC300N version on web.
> Is it true?

I'd search by FCC ID: PY307300073

My understanding v2 uses a Broadcom chipset.

  Luis

[ath9k-devel] Linksys WPC300N Wireless-N Notebook Adapter

[hong zhang]

--- On Mon, 5/18/09, Luis R. Rodriguez <lrodriguez@atheros.com> wrote:

> From: Luis R. Rodriguez <lrodriguez@atheros.com>
> Subject: Re: [ath9k-devel] Linksys WPC300N Wireless-N Notebook Adapter
> To: "hong zhang" <henryzhang62@yahoo.com>
> Cc: "Luis Rodriguez" <Luis.Rodriguez@Atheros.com>, "Luis R. Rodriguez" <mcgrof@gmail.com>, "ath9k-devel at lists.ath9k.org" <ath9k-devel@lists.ath9k.org>, "Johannes Berg" <johannes@sipsolutions.net>
> Date: Monday, May 18, 2009, 12:33 PM
> On Mon, May 18, 2009 at 09:36:43AM
> -0700, hong zhang wrote:
> > 
> > Luis,
> > 
> > 1. Does ath9k Tx/Rx buffer packets for power save
> purpose?
> 
> You mean in AP mode? If you are on a kernel >= 2.6.29
> yes. That is
> even if you are using compat-wireless you need at least
> 2.6.29 still.
> 
> > 2. Do TX power and signal level display go same path
> to mac80211
> >? ? through rate control interface?
> 
> I don't understand your question.
> 
> > I think iw dev wlan0 station should
> >? ? display Tx power and signal level as
> well.
> 
> 'iw dev wlan0 station dump' does display signal. I get:
> 
> mcgrof at tesla ~ $ iw dev wlan2 station dump
> Station 00:0b:85:5b:8d:6c (on wlan2)
> ? ? ? ? inactive time:? 22628 ms
> ? ? ? ? rx bytes:? ?
> ???3042422
> ? ? ? ? rx packets:?
> ???13165
> ? ? ? ? tx bytes:? ?
> ???177786
> ? ? ? ? tx packets:?
> ???947
> ? ? ? ? signal:? ? ?
> ???-30 dBm
> ? ? ? ? tx bitrate:?
> ???54.0 MBit/s
> 
If signal -30dBm is Tx power on a channel, why the channel number is not displayed here?

 
> Keep in mind wireless extensions added a 'quality' term
> which
> unfortunately was used differently between drivers. What we
> add to
> nl80211 should remain consistant accross drivers and it
> should be
> defined properly. If there is some enhancement to this
> reporting which
> you can think of please feel free to address this on
> linux-wireless
> with your recommendation. The next best thing we have to
> report
> signal would be through using the RCPI concept [1], but
> note that it
> specifically defines it as "the received RF power in the
> channel measured
> over the entire received frame or by other equivalent means
> which meet the
> specified accuracy". The last part is a little vague, that
> of
> "or by other equivalent means which meet the specified
> accuracy" and
> its questionable whether or not all devices support this.
> Anyway
> this could just be used by userspace and nl80211 should not
> have to know
> about this except maybe whether or not the device claims to
> support
> this accuracy terminology, I am also not sure what the
> status of 802.11k
> is which the group working on this, so it may be premature
> to just add
> it to nl80211/cfg80211.
> 
> [1] http://www.spinics.net/lists/netdev/msg12028.html
> 
> Patches are welcomed to add tx power displaying, not sure
> why we didn't
> add that.
> 
> ? Luis
> 
> > 
> > 
> > ---henry
> > 
> > --- On Mon, 5/18/09, Luis R. Rodriguez <lrodriguez@atheros.com>
> wrote:
> > 
> > > From: Luis R. Rodriguez <lrodriguez@atheros.com>
> > > Subject: Re: [ath9k-devel] Linksys WPC300N
> Wireless-N Notebook Adapter
> > > To: "hong zhang" <henryzhang62@yahoo.com>
> > > Cc: "Luis R. Rodriguez" <mcgrof@gmail.com>,
> "ath9k-devel at lists.ath9k.org"
> <ath9k-devel@lists.ath9k.org>
> > > Date: Monday, May 18, 2009, 10:41 AM
> > > On Sat, May 16, 2009 at 10:51:57PM
> > > -0700, hong zhang wrote:
> > > >
> > > > Luis,
> > > >
> > > > Have you experience XJperf (windows graphic
> version
> > > iperf) to measure UDP/TCP throughput? I think it
> does not
> > > work properly because UDP throughput is always
> 1Mbites/s.
> > >
> > > No, thanfully I don't have a windows box anywhere
> near my
> > > home or office,
> > > that's just a serious security risk. But I see
> xjperf runs
> > > in Linux, I'll give
> > > it a shot some time.
> > >
> > > > Also, does "iw dev ath0 station dump"
> display bit rate
> > > (I have not tested my WPC300N yet)?
> > >
> > > Right now ath9k does not report the proper 11n
> rate, that
> > > work needs a
> > > decent rewrite on rate handling in ath9k. For now
> please
> > > use the ath9k
> > > debugfs file, rcstat. That'll show you counters
> for every
> > > MCS rate.
> > >
> > >???Luis
> > >
> > 
> > 
> > 
> 


      

[ath9k-devel] Linksys WPC300N Wireless-N Notebook Adapter

[Luis R. Rodriguez]

On Mon, May 18, 2009 at 12:35:13PM -0700, hong zhang wrote:
> 
> 
> 
> --- On Mon, 5/18/09, Luis R. Rodriguez <lrodriguez@atheros.com> wrote:
> 
> > From: Luis R. Rodriguez <lrodriguez@atheros.com>
> > Subject: Re: [ath9k-devel] Linksys WPC300N Wireless-N Notebook Adapter
> > To: "hong zhang" <henryzhang62@yahoo.com>
> > Cc: "Luis Rodriguez" <Luis.Rodriguez@Atheros.com>, "Luis R. Rodriguez" <mcgrof@gmail.com>, "ath9k-devel at lists.ath9k.org" <ath9k-devel@lists.ath9k.org>, "Johannes Berg" <johannes@sipsolutions.net>
> > Date: Monday, May 18, 2009, 12:33 PM
> > On Mon, May 18, 2009 at 09:36:43AM
> > -0700, hong zhang wrote:
> > >
> > > Luis,
> > >
> > > 1. Does ath9k Tx/Rx buffer packets for power save
> > purpose?
> >
> > You mean in AP mode? If you are on a kernel >= 2.6.29
> > yes. That is
> > even if you are using compat-wireless you need at least
> > 2.6.29 still.
> >
> > > 2. Do TX power and signal level display go same path
> > to mac80211
> > >?   through rate control interface?
> >
> > I don't understand your question.
> >
> > > I think iw dev wlan0 station should
> > >?   display Tx power and signal level as
> > well.
> >
> > 'iw dev wlan0 station dump' does display signal. I get:
> >
> > mcgrof at tesla ~ $ iw dev wlan2 station dump
> > Station 00:0b:85:5b:8d:6c (on wlan2)
> >         inactive time:  22628 ms
> >         rx bytes:
> >    3042422
> >         rx packets:
> >    13165
> >         tx bytes:
> >    177786
> >         tx packets:
> >    947
> >         signal:
> >    -30 dBm
> >         tx bitrate:
> >    54.0 MBit/s
> >
> If signal -30dBm is Tx power on a channel, why the channel number is not displayed here?

That's seems reasoanble, patches are welcomed.

  Luis
> 
> 
> > Keep in mind wireless extensions added a 'quality' term
> > which
> > unfortunately was used differently between drivers. What we
> > add to
> > nl80211 should remain consistant accross drivers and it
> > should be
> > defined properly. If there is some enhancement to this
> > reporting which
> > you can think of please feel free to address this on
> > linux-wireless
> > with your recommendation. The next best thing we have to
> > report
> > signal would be through using the RCPI concept [1], but
> > note that it
> > specifically defines it as "the received RF power in the
> > channel measured
> > over the entire received frame or by other equivalent means
> > which meet the
> > specified accuracy". The last part is a little vague, that
> > of
> > "or by other equivalent means which meet the specified
> > accuracy" and
> > its questionable whether or not all devices support this.
> > Anyway
> > this could just be used by userspace and nl80211 should not
> > have to know
> > about this except maybe whether or not the device claims to
> > support
> > this accuracy terminology, I am also not sure what the
> > status of 802.11k
> > is which the group working on this, so it may be premature
> > to just add
> > it to nl80211/cfg80211.
> >
> > [1] http://www.spinics.net/lists/netdev/msg12028.html
> >
> > Patches are welcomed to add tx power displaying, not sure
> > why we didn't
> > add that.
> >
> >   Luis
> >
> > >
> > >
> > > ---henry
> > >
> > > --- On Mon, 5/18/09, Luis R. Rodriguez <lrodriguez@atheros.com>
> > wrote:
> > >
> > > > From: Luis R. Rodriguez <lrodriguez@atheros.com>
> > > > Subject: Re: [ath9k-devel] Linksys WPC300N
> > Wireless-N Notebook Adapter
> > > > To: "hong zhang" <henryzhang62@yahoo.com>
> > > > Cc: "Luis R. Rodriguez" <mcgrof@gmail.com>,
> > "ath9k-devel at lists.ath9k.org"
> > <ath9k-devel@lists.ath9k.org>
> > > > Date: Monday, May 18, 2009, 10:41 AM
> > > > On Sat, May 16, 2009 at 10:51:57PM
> > > > -0700, hong zhang wrote:
> > > > >
> > > > > Luis,
> > > > >
> > > > > Have you experience XJperf (windows graphic
> > version
> > > > iperf) to measure UDP/TCP throughput? I think it
> > does not
> > > > work properly because UDP throughput is always
> > 1Mbites/s.
> > > >
> > > > No, thanfully I don't have a windows box anywhere
> > near my
> > > > home or office,
> > > > that's just a serious security risk. But I see
> > xjperf runs
> > > > in Linux, I'll give
> > > > it a shot some time.
> > > >
> > > > > Also, does "iw dev ath0 station dump"
> > display bit rate
> > > > (I have not tested my WPC300N yet)?
> > > >
> > > > Right now ath9k does not report the proper 11n
> > rate, that
> > > > work needs a
> > > > decent rewrite on rate handling in ath9k. For now
> > please
> > > > use the ath9k
> > > > debugfs file, rcstat. That'll show you counters
> > for every
> > > > MCS rate.
> > > >
> > > >???Luis
> > > >
> > >
> > >
> > >
> >
> 
> 
> 

[ath9k-devel] Linksys WPC300N Wireless-N Notebook Adapter

[hong zhang]

Luis,

Have you experience XJperf (windows graphic version iperf) to measure UDP/TCP throughput? I think it does not work properly because UDP throughput is always 1Mbites/s.

Also, does "iw dev ath0 station dump" display bit rate (I have not tested my WPC300N yet)?

---henry

--- On Sat, 5/16/09, Luis R. Rodriguez <mcgrof@gmail.com> wrote:

> From: Luis R. Rodriguez <mcgrof@gmail.com>
> Subject: Re: [ath9k-devel] Linksys WPC300N Wireless-N Notebook Adapter
> To: "hong zhang" <henryzhang62@yahoo.com>
> Cc: ath9k-devel at lists.ath9k.org
> Date: Saturday, May 16, 2009, 11:06 PM
> On Sat, May 16, 2009 at 8:10 PM, hong
> zhang <henryzhang62@yahoo.com>
> wrote:
> >
> > List,
> >
> > I just bought a Linksys WPC300N Wireless-N Notebook
> Adapter.
> >
> > 1. How many anntanas does this card ?have?
> 
> Should have 2.
> 
> > 2. Should TCP throughput from AP to this card and this
> card to AP be same
> > ? if I use iperf to measure TCP throughput?
> 
> That's the goal, although I think we achieve this better in
> current
> wireless-testing (what you will see in 2.6.31). If you want
> to use the
> above MCS rates you want to use wireless-testing for now.
> If you don't
> mind ~ MCS 11 2.6.30 will do.
> 
> http://wireless.kernel.org/en/developers/Documentation/ieee80211/802.11n
> 
> ? Luis
> 


      

[ath9k-devel] Linksys WPC300N Wireless-N Notebook Adapter

[Luis R. Rodriguez]

On Sat, May 16, 2009 at 10:51:57PM -0700, hong zhang wrote:
> 
> Luis,
> 
> Have you experience XJperf (windows graphic version iperf) to measure UDP/TCP throughput? I think it does not work properly because UDP throughput is always 1Mbites/s.

No, thanfully I don't have a windows box anywhere near my home or office,
that's just a serious security risk. But I see xjperf runs in Linux, I'll give
it a shot some time.

> Also, does "iw dev ath0 station dump" display bit rate (I have not tested my WPC300N yet)?

Right now ath9k does not report the proper 11n rate, that work needs a
decent rewrite on rate handling in ath9k. For now please use the ath9k
debugfs file, rcstat. That'll show you counters for every MCS rate.

  Luis

[ath9k-devel] Linksys WPC300N Wireless-N Notebook Adapter

[hong zhang]

List,

I just bought a Linksys WPC300N Wireless-N Notebook Adapter.

1. How many anntanas does this card  have?
2. Should TCP throughput from AP to this card and this card to AP be same
   if I use iperf to measure TCP throughput?

Thanks for help!

--henry




      

[ath9k-devel] Linksys WPC300N Wireless-N Notebook Adapter

[Luis R. Rodriguez]

On Sat, May 16, 2009 at 8:10 PM, hong zhang <henryzhang62@yahoo.com> wrote:
>
> List,
>
> I just bought a Linksys WPC300N Wireless-N Notebook Adapter.
>
> 1. How many anntanas does this card ?have?

Should have 2.

> 2. Should TCP throughput from AP to this card and this card to AP be same
> ? if I use iperf to measure TCP throughput?

That's the goal, although I think we achieve this better in current
wireless-testing (what you will see in 2.6.31). If you want to use the
above MCS rates you want to use wireless-testing for now. If you don't
mind ~ MCS 11 2.6.30 will do.

http://wireless.kernel.org/en/developers/Documentation/ieee80211/802.11n

  Luis