On 9/26/06, Philip Levis <
[EMAIL PROTECTED]> wrote:
On Sep 25, 2006, at 7:44 PM, Michael Schippling wrote:
> I'm not entirely certain that ACKs work in TOSSIM, like rssi....
>
ACKs work in TOSSIM. The default (TR1000) radio stack actually
emulates the ACK bit pattern, etc. I do not know about the CC1000
stack from Harvard or the CC2420 stack in beta/. In particular, I
don't know what the ACK loss model is.
TOSSIM 2.0 supports ACKs. Its big limitation right now is that since
it's based on an RSSI model, in the absence of environmental
variation its connectivity is very stable, much more stable than the
real world. I'm looking into ways to improve this. I doubt it will
make it into the 2.0 release, but it should be shortly thereafter.
> But in any case the TOS_Msg.ack field is output, not input.
> It indicates whether and ACK was received, it doesn't enable them.
> To use ACKS you need to call MacControl.enableAck() on the receiving
> (or better, both) side, and make sure to send messages to specific
> moteID addrs.
Correct. By default, ACKs are on in TOSSIM. It does not have
MacControl (you can't turn them on and off).
Phik
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