On Mar 5, 2008, at 8:36 AM, Kaan Tuna wrote:
Hi all,
I have a multihop CollectionC network with a root node and three
nodes, each sending a data packet (measurements) every 15 minutes.
Using alkaline batteries with about 2500mA capacity, I analyzed
that the overall power consumption is about three times of what I
expected (down from 2.99V to 2.80V in a week).
Could there be some debug messages or unexpected multi-hop traffic?
Any suggestions or ideas to improve power consumption would be
greatly welcome!
Here are some details about my configuration:
1) I am using an ACK_LPL check interval of 1 second.
2) I am also using PacketLink layer for software Acks. (5 retries,
10ms delay)
3) My network is static, i.e. immobile. I am not even sure if it
needs to multi-hop with this placement. But nodes' power decrease
like they are sending 40-50 packets every 15 mins.
CollectionC is not yet ultra-low power. In particular, the base
station sends routing beacons very often, more often than it needs
to. This is the item we're working on right now: the approach we've
taken is to first work on its path selection efficiency, then work on
lowering the control traffic (in progress now).
One simple fix is to lower the beaconing rate of the base station by
adjusting the constants in CtpP.nc passed to CtpRoutingEngineP:
components new CtpRoutingEngineP(TREE_ROUTING_TABLE_SIZE, 10,
1024) as Router;
Try changing the 10 to 60, and see if that helps.
Phil
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