[Tinyos-help] Re-asked question something strange please help

[Nahr ...]

 Hi,
I made a grid topology 81 nodes spaced by 4 feet.
when I ran simulation : each node sent only one packet and the total packet
received by the sink is equal to zero.
==> PDR = 0
However when I increased the number of node to 100 (grid spaced by 4 feet) I
found that the number of packet
sent by each node has been increased also the number of packet received
==> PDR is about 0,512....

I don't understand why the PDR droped to zero in the case of 81 nodes and
then it has been increased in the case of
100 nodes ???!!!!
what happened ?
please help me.


Thank you very much,
Cheers,
Nahr Elk
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