On Feb 9, 2007, at 4:35 PM, ricardo tiago wrote:
Hi, Here is a situation that is happening when 2 motes broadcast a
packet in tossim. I've seen this two cases happening in the same
simulation. I haven't figured out why this is happening , i checked
and rechecked my code. Could this some issue in tossim or in my code
or something else? Any suggestions?
1ª Case: Mote 5 and 1 send a broadcast msg , and their neighbors
receive the correct message. Everything is fine in this one.
DEBUG (5): Sending Forward Broadcast Msg @ 0:0:5.988671899
DEBUG (5): Starting CSMA with 41045903.
DEBUG (1): Timer fired!
DEBUG (1): Sending Forward Broadcast Msg @ 0:0:5.993632836
DEBUG (1): Starting CSMA with 17700092.
DEBUG (5): PACKET: Broadcasting packet to everyone.
DEBUG (5): PACKET: Send done at 59961181449.
DEBUG (13): PACKET: Signaling receive at 59956298665.
DEBUG (13): Receive Broadcast msg from 5 @ 0:0:5.995629866
DEBUG (1): PACKET: Signaling receive at 59956298665.
/* Neighbors receive the packet...ok*/
DEBUG (5): PACKET: Signaling send done at 59961181449.
DEBUG (1): PACKET: Broadcasting packet to everyone.
DEBUG (1): PACKET: Send done at 60006518388.
DEBUG (0): PACKET: Signaling receive at 60001635604.
DEBUG (0): Receive Broadcast msg from 1 @ 0:0:6.000163560
/* Neighbors receive the packet...ok*/
DEBUG (1): PACKET: Signaling send done at 60006518388.
2ª Case: Mote 13 and 5 send a broadcast msg. Mote 5 sends the
message first and his neighbors receive the correct msg, then mote
13 broadcasts his msg but his neighbors receive the mote 5 msg. The
neighbors of 5 aren't the same of mote 13.
DEBUG (13): Sending Forward Broadcast Msg @ 0:0:3.389882836
DEBUG (13): Starting CSMA with 34332075.
DEBUG (5): Sending Forward Broadcast Msg @ 0:0:3.390039086
DEBUG (5): Starting CSMA with 25787203.
DEBUG (5): PACKET: Broadcasting packet to everyone.
DEBUG (5): PACKET: Send done at 33959289450.
DEBUG (14): PACKET: Signaling receive at 33954406666.
DEBUG (14): Receive Broadcast msg from 5 @ 0:0:3.395440666
DEBUG (13): PACKET: Signaling receive at 33954406666.
DEBUG (13): Receive Broadcast msg from 5 @ 0:0:3.395440666
/* Neighbors receive the packet...ok */
DEBUG (5): PACKET: Signaling send done at 33959289450.
DEBUG (13): PACKET: Broadcasting packet to everyone.
DEBUG (13): PACKET: Send done at 33986260719.
DEBUG (12): Receive Broadcast msg from 5 @ 0:0:3.398137793
DEBUG (14): PACKET: Signaling receive at 33981377935.
DEBUG (14): Receive Broadcast msg from 5 @ 0:0:3.398137793
DEBUG (4): PACKET: Signaling receive at 33981377935.
DEBUG (4): Receive Broadcast msg from 5 @ 0:0:3.398137793
/ * The same thing happens to the others neighbors of 13. They
receive the message that 5 was sending and not the message from 13,
even when 5 has signaled sendDone */
DEBUG (13): PACKET: Signaling send done at 33986260719.
Any help would be really appreciated,
Ricardo
Please check back through the archives; this problem appears every
six months or so. You are trying to transmit using a buffer you have
given to the radio stack to receive with. So the packet received from
node 5 is transmitted instead of the one that node 13 generated.
Phil
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