ath10k tx99-like test mode?

ath10k tx99-like test mode?

[Simon Wunderlich]

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Hi,

is there a test mode for ath10k where one can set different legacy/MCS rates to 
test output power levels in a lab? We used tx99 on ath9k for that purpose, is 
there an equivalent feature in ath10k as well?

Thanks!
    Simon

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Re: ath10k tx99-like test mode?

[Ben Greear]

On 03/16/2015 05:21 AM, Simon Wunderlich wrote:
> Hi,
>
> is there a test mode for ath10k where one can set different legacy/MCS rates to
> test output power levels in a lab? We used tx99 on ath9k for that purpose, is
> there an equivalent feature in ath10k as well?

My firmware and driver changes have recently given the ability to set
fixed rates for all types of traffic.

Only caveat so far as that mgt frames (beacons and such) cannot be set
to HT or VHT rates.

Stock firmware should be able to set all but mgt rates (bcast, ucast, mcast) with a firmware
update, but stock firmware does not support setting mgt rate from what I can tell.

Maybe not quite as good as what you can do with ath9k, but perhaps good enough?

Thanks,
Ben

>
> Thanks!
>      Simon
>
>
>
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-- 
Ben Greear <greearb@candelatech.com>
Candela Technologies Inc  http://www.candelatech.com

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Re: ath10k tx99-like test mode?

[Pushpal Sidhu]

On Mon, Mar 16, 2015 at 5:21 AM, Simon Wunderlich <sw@simonwunderlich.de> wrote:
> is there a test mode for ath10k where one can set different legacy/MCS rates to
> test output power levels in a lab? We used tx99 on ath9k for that purpose, is
> there an equivalent feature in ath10k as well?

Simon,

I've asked about this before since a 'testmode' was added to ath10k
several months ago, but was pretty much shot down. However, there's a
nifty tool called wperf (https://github.com/anyfi/wperf) that might
accomplish what you're after. I've yet to try it, but it does seem
promising since you'll hopefully be able to use UDP traffic to inject
frames into the air, though I'm not sure how the firmware will react.

- Pushpal

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Re: ath10k tx99-like test mode?

[mrex]

Ben,

The tx99 feature has the benefit of not needing any client or traffic to be
passed for a power meter to measure.  So it’s incredibly fast to test
different rates and output power than having to wait for client to
re-associate, pass traffic and adjust power meter to duty cycle (depending
on how fancy the meter is).  This is more applicable for calibration and
evaluation than for adaption or protocol testing.

Tx99 is better suited for calibration and FCC certification testing and not
for testing things like adaptive modulation or what happens when mixed
modulations are enabled.  It cuts down on lab certification test time and
complexity (lab engineers test a different wireless widget every day and not
familiar with webGUI’s and config settings, etc).  Tx99 often was more ‘raw’
and didn’t behave the same as adaptive modulation algorithm, probably more
so with more streams than 1 and 11b/g/n.

So having a feature that can just output raw frames at full duty cycle at a
specific rate and output power without client would be highly beneficial for
lab testing and reduce test time and complexity for radio validation.

Best regards,
Mike


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Re: ath10k tx99-like test mode?

[Ben Greear]

On 03/16/2015 01:51 PM, mrex@tranzeo.com wrote:
> Ben,
> 
> The tx99 feature has the benefit of not needing any client or traffic to be
> passed for a power meter to measure.  So it’s incredibly fast to test
> different rates and output power than having to wait for client to
> re-associate, pass traffic and adjust power meter to duty cycle (depending
> on how fancy the meter is).  This is more applicable for calibration and
> evaluation than for adaption or protocol testing.
> 
> Tx99 is better suited for calibration and FCC certification testing and not
> for testing things like adaptive modulation or what happens when mixed
> modulations are enabled.  It cuts down on lab certification test time and
> complexity (lab engineers test a different wireless widget every day and not
> familiar with webGUI’s and config settings, etc).  Tx99 often was more ‘raw’
> and didn’t behave the same as adaptive modulation algorithm, probably more
> so with more streams than 1 and 11b/g/n.
> 
> So having a feature that can just output raw frames at full duty cycle at a
> specific rate and output power without client would be highly beneficial for
> lab testing and reduce test time and complexity for radio validation.

I tried to get ath10k firmware to send raw frames on a monitor interface,
but it seems it requires a peer of some sort before it will send frames,
and I had no real luck.

I'm imagine there is some way to make firmware able to do this, but I don't
know how to do that at this time.

Thanks,
Ben

-- 
Ben Greear <greearb@candelatech.com>
Candela Technologies Inc  http://www.candelatech.com


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