[Tinyos-help] TOSSIM Radio problems...

2006-09-25 Thread Bryn Smith 
I'm using TOSSIM to simulate 11 motes, and at one stage it seems that
some packets are being sent, but not received in the simulator. If I
turn on the PACKET debug mode, I can see that the bytes of the 'dropped'
packets are interleaved (both transmitting at the same time), but the
send() and sendDone() calls both return SUCCESS. Can anyone make any
suggestions as to how I would fix this problem?

Thanks,

Bryn Smith
Honours Student
Department of Computer Science and Computer Engineering
La Trobe University

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Re: [Tinyos-help] TOSSIM Radio problems...

2006-09-25 Thread Philip Levis 

On Sep 25, 2006, at 7:30 AM, Bryn Smith wrote:


I'm using TOSSIM to simulate 11 motes, and at one stage it seems that
some packets are being sent, but not received in the simulator. If I
turn on the PACKET debug mode, I can see that the bytes of the  
'dropped'

packets are interleaved (both transmitting at the same time), but the
send() and sendDone() calls both return SUCCESS. Can anyone make any
suggestions as to how I would fix this problem?




SUCCESS on sendDone() means the packet was *sent*, not *received*  
successfully.


The typical approach to this problem is synchronous acks. Check the  
ack field of the message buffer.


Phil
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