On Jun 8, 2006, at 9:39 AM, Adam wrote:
Philip, thanks for help. I was reading one paper from David Culler
regarding
the immediate ACK in TinyOS. Just curious, was it actually a
packet, or
through certain correlated signals or something? From your email,
it seems
like a packet is actually sent out. Correct me if I understand wrong.
Depends on which platform.
On the mica, it was not a packet, just a bit sequence. That is, it
did not have any header fields. (MicaHighSpeedRadioM.nc:272 for ack
tx, MicaHighSpeedRadioM.nc:366 for ack rx).
On the mica2 and mica2 dot, this was the case as well
(CC1000RadioIntM.nc:150).
On the micaZ/telos families (CC2420 radios), the acks are part of the
802.15.4 specification, and are proper packets.
Phil
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