[Tinyos-help] Maximum datarate on CC1000 radio

[venkatesh s]

Thanks for your kind reply Phil and Michael...

What about if i make the nodes to communicate in a single range, and force
them to come on hop., which means there shouldn't be hidden node problems..

I did the following to achive the above, for the 3 node network..

Node 2 was forced to receive only node 1 packets (i.e, the route packets)
Node 1 was forced to receive both node 2 and node 0 (Rx) packets.
Node 0(Rx)  was forced to receive only node 1 packets..

I used this logic in the event of Receive message in MultihopLEPSM.nc file.
so, this was routing the packets on hop but on a single range..

Under this case, i get the same results..

I thought of capturing why actually the packets are lost using a TOSBase.
It seems that TOSBase also missed some packets. I have tabulated the results
below, so that it will be clear..

ID  |  SentPackets | Packets received  | Packet Drops  |  Packet Drops  |
___|____________ |   for forwarding     |     at  Rx          |   at
TOSBase  |
  1 |      1000         |        996              |    1000
|       994          |
  2 |      1000         |         0                 |      994
|        997         |
__________________________________________________________ |

I really wonder over here, why there is no packet loss for node 1.  I
experimented almost 10 - 12 times. It gave me almost the same results.. Few
packets of node 2 were not received by node 1, while node 2 says he has sent
to medium..  Also, TOSBase was able to receive more packets of node 2 than
node1..

Is there such that the preamble getting corrupted which makes the packet
totally lost at node1??
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