[Tinyos-help] multihop problems

[Aditya Bhave]

I never used surge. Its quite simple to write the multi-hop routine
yourself. Check back in the message archives. I had provided the detailed
code.

I used controlled flooding. Another way to do routing is to build routing
tables, something i think surge may be doing, wherein the packets try and
follow an "optimum" path to the destination. But the code outline will be
similar in this case as well.

On 7/10/06, Tehn Yit Chin <tehn-yit.chin at greyinnovation.com> wrote:
>
> Thanks for the information.
>
> Does the multihop works out-of-the-box with the surge application?
>
> Tehn Yit Chin
> Embedded System Engineer, Grey Innovation Pty. Ltd.
>
>
> Aditya Bhave wrote:
> > A packet will multi-hop if node2 is not within radio range of base. Its
> > packet will reach node1 only who then has to send it to the base
> station.
> >
> > Im not really able to understand your question. To find out neighbors,
> have
> > each mote broadcast a special packet
> >
> > typedef struct Neighbor
> > {
> >     int src; /* source mote ID */
> >     int hopCount; /* initilaize to 0 */
> > }
> >
> > If a mote A receives a packet of the above type from node B with
> hopCount
> > set to 0, it can conclude that B is its neighbor. Also by controlled
> > flooding, these packets need to be multihopped across the network with
> the
> > hopCount being incremeneted each time. In this way, motes can get an
> idea
> > about the topology of the network.
> >
> > To start the nodes in sequence, let each node wait for a START message
> from
> > the base station i.e they are all in receive mode not doing anything
> till
> > the START message arrives. The base station will transmit the START
> > message.
> >
> > On 7/10/06, Tehn Yit Chin <tehn-yit.chin at greyinnovation.com> wrote:
> >
> >>
> >> Hi,
> >>
> >> I have the following setup
> >>
> >> node2 <--> node1 --> base
> >>   |                    ^
> >>   +--------------------+
> >>
> >> node2 and node1 has the surge application installed.
> >> base has the TOSBase installed.
> >>
> >> No matter what I try, I can't seem to get a packet to multihop from
> >> node2 to node1 to base. All the packets appears to single hop to the
> >> base.
> >>
> >> A couple of questions.
> >>
> >> 1) Does the base node needs to transmit for node1 to work out one of
> its
> >> neighbours is node 0? One of things I tried is to install surge into
> >> base node but this does not appears to be cause the packet to multihop.
> >>
> >> 2) Will the packet multihop with only two nodes in the network?
> >>
> >> 3) Is there a power up sequence? ie base node first, and then node 1
> and
> >> the node 2?
> >>
> >> 4) What are the conditions that will cause a packet to multihop?
> >>
> >> Any suggestion is appreciated.
> >>
> >> --
> >> Tehn Yit Chin
> >> Embedded System Engineer, Grey Innovation Pty. Ltd.
> >> _______________________________________________
> >> Tinyos-help mailing list
> >> Tinyos-help at Millennium.Berkeley.EDU
> >>
> https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
> >>
> >
> >
> >
>



-- 
regards,
Aditya Bhave
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