[Tinyos-devel] timestamps in seriallisten/sflisten etc.

[Vlado Handziski]

On Thu, Jun 26, 2008 at 23:23, Philip Levis <pal at cs.stanford.edu> wrote:

>
> On Jun 26, 2008, at 2:16 PM, Vlado Handziski wrote:
>
>  I agree that most of the time we don't need the ACKs in the mote->PC
>> direction, so the default can remain as is. But we definitely should enable
>> the possibility to request an ACK in the other direction. We just need a
>> single retransmit timer. I don't think it is a significant bloat.
>>
>
> For code bloat, I mostly meant the mote side. It's more than a retransmit
> timer: it expands the state machine, and actually adds a good deal of
> processing logic.
>

We don't have to export the control to the function to the upper layers. I
was thinking more in line of adding a new protocol type that the PC can use
in a packet to the mote indicating that the next packet that the mote will
send back has to be ACKed by the PC.


>
> I agree it would make sense to write the PC-side serial stacks to support
> sending acks when requested. There's nothing stopping anyone from adding
> this functionality.
>
>
At least our (TUB) implementations already support this.

Vlado
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