[PHY] Adaptive equipment

[Valentin VERGEZ]

Hi,

Thanks adrian for the answers !

I wonder who provides the ATH HAL (for 93000) ? Qualcomm ?
The linux ath9k do not use any HAL, so does Qualcomm provide an HAL only for BSD ?

Valentin,

----- Mail original -----
> De: "Adrian Chadd" <adrian.chadd at gmail.com>
> À: "Valentin VERGEZ" <valentin.vergez at stormshield.eu>
> Cc: freebsd-wireless at freebsd.org
> Envoyé: Mercredi 19 Avril 2017 17:23:25
> Objet: Re: [PHY] Adaptive equipment

> hiya,
> 
> there's no DFS mode publicly available for ath. Everything but the
> radar detector is in freebsd-head.
> 
> Oh, if it's talking about adaptive being "transmit rate" then yes, you
> can configure a static transmit rate (ifconfig wlanX ucastrate Y).
> 
> Listen before talk is normal atheros CCA. it's done by the chip,
> programmed by the HAL and can be driver controlled if you know what
> code to add. By default it's set to the -62dBm level that you need for
> CCA.
> 
> Thanks!
> 
> 
> 
> -adrian
> 
> 
> On 19 April 2017 at 06:56, Valentin VERGEZ
> <valentin.vergez at stormshield.eu> wrote:
>> Hi,
>>
>> Do you guys know if the "Adaptive" aspect on a FreeBSD wifi product is
>> manageable ?
>> For an ETSI compliance certification, on a FreeBSD wifi Access Point with
>> Atheros AR9380 NIC, the certifying authority needs to know if the equipment is
>> adaptive or non-adaptive. And if it's an adaptive equipment, if it has the
>> possibility to switch to a non-adaptive mode.
>>
>> Regarding ETSI EN 300 328 V1.9.1 section 4.2.2, Adaptive could correspond to DFS
>> ... which, on hostap mode, is not fully implemented ?
>>
>> I thought that adaptive was for auto-selecting modulation depending on
>> Signal/Noise ratio. But now, i'm confused.
>>
>> However, it is my understanding that these aspects are operated by the Qualcomm
>> HAL and therefore not manageable. I seek confirmation on this point.
>>
>> While I am on the subject, I wonder if the "Listen Before Talk" is Frame Based
>> or Load Based. And again, is it operated by the HAL or an upper layer ?
>>
>> Thanks,
>> ---
>>
>>
>> Valentin VERGEZ
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