Re: mac80211: TDMA approach feasible?

["Luis R. Rodriguez" <mcgrof@xxxxxxxxx>]

On Fri, May 22, 2009 at 6:46 AM, Nick Kossifidis <mickflemm@xxxxxxxxx> wrote:
> 2009/5/22 ffileppo <ffileppo@xxxxxxxxx>:
>>
>>> > I was wondering if with mac80211 is now possible (and what effort is
>>> > needed) to implement a TDMA approach. In particular I would like to:
>>> > override 802.11 MPDU frame format, eliminate RTS/CTS exchange,
>>> > eliminate automatic ACK and retransmission, eliminate virtual carrier
>>> > sense (NAV), control PHY clear channel assessment and control
>>> > transmission backoff.
>>>
>>> Most of this is usually implemented in firmware, so you need access to
>>> firmware sources.
>>>
>>
>> Hi,
>> thanks for your answer.
>>
>> If these features are implemented in firmware, it should be possible to modify them if using for example Ath5k (which is a completely FOSS Linux driver) Right? Could you give me any directions?
>>
>> Talking about the TDMA implementation I was wondering if it is possible to achieve a time granularity of 1?s using commercial-of-the-shelf wifi cards (e.g. atheros ones).
>>
>> I would appreciate any ideas or thoughts on this matter.
>>
>> Thank you,
>>
>> Francesco
>>
>
> Check out freebsd they have TDMA support for the ath driver as far as
> i know. It would be cool if we could port it on linux ;-)

And if such support comes around, it would make sense as a separate
driver. You would need also need a way to ensure proper regulatory
compliance.

http://wireless.kernel.org/en/developers/Regulatory

CRDA was designed to be flexible for any wireless technology.

  Luis
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