On Jul 30, 2007, at 6:39 AM, Todd Roper wrote:
Phil,
Thanks again for the quick reply!
I asked the original question because there seems to be a lot of
overhead coming from the root node. I have a BaseStation app set
up to
sniff what is going on close to the Root, and I see packets every
second
or faster being transmitted. This looks to be the overhead associated
with keeping the routing tables updated and a beacon timer?? , etc.
I am after a low-power, minimal RF overhead type of application
(basically, sensors are reporting in at a minimum of every 5
minutes...
however, I can have a large number of sensors installed to 1 root
(up to
200 nodes)).
Can you suggest whether I should taylor this to fit that type of
application? Or is there a different network implementation that I
should be attempting to use besides CTP. My nodes are installed all
over a building and I have lowered the CC1000 baud in order to
bring the
range up for the nodes, however, this increases the time per
packet. I
am after multi-year battery life so this is very important for me to
figure out.
The CTP root node current sends beacons very often, in order to
ensure that a network forms quickly.
You can always change the rate at which it sends beacons by
increasing the value of the second parameter to CtpRoutingEngineP in
CtpP.nc. E.g., if you set it to 30 it will send beacons every 30s.
Phil
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