[Tinyos-devel] [Tinyos Core WG] TEP105: LowPowerListening DutyCycles

[Stephen Dawson-Haggerty]

It seems like this is very similar to what the PacketLink interface is
for; changing its semantics to return FAIL if a send wasn't acked
might be a reasonable approach.

Steve

On Mon, May 19, 2008 at 10:12 AM, Andreas Koepke
<koepke at tkn.tu-berlin.de> wrote:
> Should we go ahead and define such an interface?
>
> Philip Levis:
>>
>> On May 19, 2008, at 3:17 AM, Vlado Handziski wrote:
>>
>>>
>>> The problem here is that the AM abstraction has traditionally been
>>> understood as a "best-effort" or unreliable single-hop service. Thats
>>> why the semantics of the result values are like they are. If we want
>>> to push a traditional LL/MAC stack organization below AM, these
>>> assumptions would need to be revisited, but this is the source of some
>>> of the confusion about the LPL control also.
>>
>> That's right; if one wanted different sendDone semantics (e.g., SUCCESS
>> on ack), one could write a ReliableAMSend interface whose implementation
>> calls enableAck on the send downcall, and checks for wasAcked on the
>> event upcall, passing FAIL on the sendDone if it wasn't acked.
>>
>> Phil
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