[CUWiN-Dev] radiotap TSFT field

[David Young]

On Fri, Feb 23, 2007 at 02:36:56PM +0900, Wonho Kim wrote:
> Hi Dave,
> 
> We are trying to capture packets transmitted on the air. We plan to use TSFT
> field to construct the timeline of packet transmissions. For more accuracy,
> I'd like to know when the TSFT value per each received packet is generated.
> I know that the TSFT value is recorded in the MAC layer, but I don't know
> whether it is generated when all the bits of a packet are received at the
> PHY layer or when the first bit of a packet arrive at the PHY layer at the
> receiver. Would you tell me about the exact timing of the TSFT generation?

I am pretty sure that the TSF timestamp is generated when the first bit
is received.  I suggest experimenting to make sure.

Dave

-- 
David Young             OJC Technologies
dyoung at ojctech.com      Urbana, IL * (217) 278-3933