On Tue, Dec 3, 2013 at 6:03 AM, nivedita datta <[email protected]>wrote:
> Sorry if my doubt is again trivial but I was unable to find any helpful > solution for this on Google. > Actually not a bad question. > > I am working on sensor nodes communication & wanted to designate one node > as the sink & all other nodes as source. > This is the scenerio that CTP (Collection Tree Protocol) was designed for. > > The source nodes here would periodically send the sensed data to the sink > node & then go to sleep till the next interval. However, at any point of > time, if needed, the sink node should be able to request for sensed data > from the source nodes irrespective of whether they are awake or asleep. > Well that is problematic. Depends on what you mean by sleep. If just the CPU goes to sleep and the radio is awake then the reception of a packet will wake the cpu up. But if the radio is asleep, I don't see how the sleeping nodes will wake up or receive the incoming packet. So how exactly do you see this working? > > Any pointers on how to code for such a scenario. > First understand how things work. .... then figure out how to code it. > > Thanks for your time & effort. > > Regards, > Nivedita Datta > > _______________________________________________ > Tinyos-help mailing list > [email protected] > https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help > -- Eric B. Decker Senior (over 50 :-) Researcher
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