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Re: implementing APSD?

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On Feb 20, 2008 5:24 PM, Johannes Berg <johannes@xxxxxxxxxxxxxxxx> wrote:
> Hi,
>
> I've long thought about implementing APSD but it seems to require
> setting the "more data" bit in an ACK frame and various other things.
> Ron, I think you're the QoS expert, is that really how APSD works? If
> so, does iwl firmware implement that?

We have uAPSD implementation, mainly AP part, yet again it for  older
mac. It will take a bit time to merge it in
It's a mandatory feature for HT AP.

> Also, does Atheros hardware implement that, and how? It doesn't look
> like Broadcom firmware implements it, and I don't really understand how
> one could implement it without many hardware queues, since it seems
> timing critical to send out the frames to the station that is using
> APSD.
>
Don't believe it's possible to that without HW support.

Tomas
> Any clues?
>
> johannes
>
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