2013-04-10 07:22:50

by Adrian Chadd

[permalink] [raw]
Subject: Re: [ath9k-devel] AR9287 ; 2-wire coexistence expected behavior

No, wifi stomping occurs with both 2-wire and 3-wire.

BT_PRIORITY just gives the MAC the ability to tell the difference
between high priority TX and any bt activity requiring the air, so the
MAC can then choose a weight based on differnet kinds of BT inputs.

If all you have is two wire, then you don't get separate weight table
entries for different kinds of BT transmissions.



adrian

On 9 April 2013 23:13, sandeep suresh <[email protected]> wrote:
> Hello Mr.Adrian,
> Thanks for your response. I understand the following: Please correct if
> I am wrong.
> 1. With WLAN_ACTIVE and BT_ACTIVE, the wireless medium is managed between BT
> and WLAN without stomping the traffic.
> 2. With WLAN_ACTIVE, BT_ACTIVE and BT_PRIORITY, WiFI traffic stomping is
> possible.
>
> Regards
> Sandeep.
>
> From: Adrian Chadd <[email protected]>
> To: sandeep suresh <[email protected]>
> Cc: Sujith Manoharan <[email protected]>; ath9k-devel
> <[email protected]>; "[email protected]"
> <[email protected]>
> Sent: Wednesday, 10 April 2013 11:07 AM
>
> Subject: Re: [ath9k-devel] AR9287 ; 2-wire coexistence expected behavior
>
> Right, but same deal - if it asserts the line, it should stomp wifi
> transmission in your particular scheme.
>
>
>
> adrian
>
>
> On 9 April 2013 19:37, sandeep suresh <[email protected]> wrote:
>> Hello Mr.Adrian,
>> Thanks for your response. During googling, I had come across the
>> following 2-wire coexistence solution from owl modules.
>>
>>
>> http://support.connectblue.com/display/PRODWLAN/cB-OWL22x+Bluetooth+co-existence+application+note
>> According to this application note, for 2-wire coexistence, WLAN_ACTIVE
>> and
>> BT_PRIORITY signals are used rather than WLAN_ACTIVE and BT_ACTIVE. What
>> is
>> your opinion on this? And as I understand owl modules are based on Atheros
>> chipsets.
>>
>> Regards
>> Sandeep.
>>
>> From: Adrian Chadd <[email protected]>
>> To: sandeep suresh <[email protected]>
>> Cc: Sujith Manoharan <[email protected]>; ath9k-devel
>> <[email protected]>; "[email protected]"
>> <lin[email protected]>
>> Sent: Wednesday, 10 April 2013 4:30 AM
>>
>> Subject: Re: [ath9k-devel] AR9287 ; 2-wire coexistence expected behavior
>>
>> Hi,
>>
>> Yes, "WLAN_ACTIVE" here is just both TX and RX activity.
>>
>> So if it were working, that would stay low.
>>
>>
>>
>> adrian
>>
>>
>
>