[Tinyos-help] Collection: Loosing Connection to a Node

[Omprakash Gnawali]

We have not encountered this situation in our testing. Is this bug
deterministic? Example, it happens after certain number of packets,
certain number of days, or at a certain location?

If there are very few neighbors, all the possible paths leading to the
root might not be good enough to deliver packets successfully. The
number of neighbors can change over time even if you don't move the
motes.

- om_p

On Fri, Apr 4, 2008 at 9:44 AM, Bulut ERSAVAS <bfersavas at gmail.com> wrote:
> Hi all,
>
> My Main Question: "Is it possible in CTP for a node to get stuck in a state
> where it can no longer find a path to the root? If so, is there any
> workaround? Would rebooting motes every now and then help?"
>
> Rest of the Story (for those interested):
> --------------------------------------------------------
> We have 6 separate Collection networks in the field. We collect the data
> from their root nodes through GPRS modems. Some of the nodes in few of those
> networks lost their path to root node and stop sending their measurements
> (temperature & humidity). We contacted the people on the field and the motes
> stay in their original location.
>
> We know that their battery levels were fine looking at the latest data sent.
>
> Does anyone have any theories as to what might have happened?
>
> Thanks,
> Bulut
>
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