On 03/04/2013 02:42 PM, Thomas Hühn wrote:
> Hi Ben,
>>
>>> Any idea how feasible it is to do per-vif tx-power in ath9k?  I think
>>> it would come down to putting the desired tx-power into each packet
>>> (as the VIF sends it towards the driver) and then changing the power
>>> as packets were transmitted in the NIC...
>> No need for 'changing the power as packets were transmitted', that would
>> be horribly messy and unreliable anyway. The hardware is capable of
>> proper per-packet TPC, configurable via the tx descriptor.
> I am currently shaping my transmit power control per link codebase for 
> upstream. My current Minstrel changes are a
> prerequisite… so hopefully in the next weeks I can take the necessary clean 
> up time.
> It enables power level settings per packet (in ath5k chips) and per mrr chain 
> (in several ath9k chips).
>>
>>> The goal is to have multiple virtual APs, each with different tx-powers
>>> in order to roughly affect rx-signal quality for the stations that
>>> are scanning for APs…
> I think you can easily extend the TPC code to realize your idea of different 
> tx power levels per VIF.

Awesome!

I'll look forward to your patches...

Ben

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

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