I read your paper on Trickle. Is Trickle not the best mechanism to reliably broadcast commands to the entire network? From the paper it seems like an efficient way to do broadcasting? Or is Trickle more suited for cases where data disseminiation and not so much for broadcasting commands? Potentially in the future, I would like to use Trickle and try to make it a general purpose component.
Thank you for the help. I'll probably switch over to TinyOS 1.x and use Drip.
Thanks,
Franc
On 11/28/05, Philip Levis <
[EMAIL PROTECTED]> wrote:
On Mon, 2005-11-28 at 14:01 -0500, Franc Tan wrote:
> I guess I'm not understanding how MVirus works. I've looked at the
> latest Mate' code and I see how MHandlerStore sits on top of MVirus.
> The only hooks that I see MHandlerStore has with MVirus is the
> registerCapsule command and handling the MVirus events.
MVirus isn't intended to be a general component that you can plug in
anywhere; it's pretty enmeshed with the rest of the VM engine.
> The problem I have is understanding how to introduce a new capsule
> that should be propogated throughout the network. Does
> registerCapsule() command perform this duty?
No. The way you introduce a new capsule is through the network.
Generally, you introduce it to a single node over a serial link using
the Mate' java toolchain. The network then propagates it to every node.
It turns out that, in the context of Mate', the idea of a node being
able to generate a new capsule itself is kind of dangerous, so the
software structure doesn't let you do so easily.
> I understand the part that the versions array will be initialized to
> zeros, but how do you let MVirus know that you have a new capsule that
> needs to be propogated? How do you update the version number?
You install a new capsule.
> What I've done so far is to take your MVirus implementation and write
> it in the latest version of TinyOS. I would like to use your
> algorithm to efficiently brodcast data and commands to a network of
> motes. I'm not using it in the context of Mate'. Right now I just
> have a simple app that uses MVirus and I'm trying to use it to
> disseminate commands. I must not be wiring up all the proper
> components to get it working correctly?
If you want a general dissemination component, I suggest that you look
at Drip (lib/Drip). Gil put a bit of work into building a dissemination
stack where you can plug in data types (such as commands).
Phil
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