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Re: [Roll] "Node energy" as a metric for MRHOF

Omprakash Gnawali <gnawali@cs.uh.edu> Sat, 02 June 2012 09:13 UTC

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From: Omprakash Gnawali <gnawali@cs.uh.edu>
Date: Sat, 02 Jun 2012 04:13:02 -0500
Message-ID: <CAErDfUTBQqOkkktedWXty43DH8TQvxWr+JGkQZmPrQ8rsQ+_Fw@mail.gmail.com>
To: Ralph Droms <rdroms.ietf@gmail.com>
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Cc: draft-ietf-roll-minrank-hysteresis-of@tools.ietf.org, roll@ietf.org
Subject: Re: [Roll] "Node energy" as a metric for MRHOF
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On Fri, Jun 1, 2012 at 2:53 PM, Ralph Droms <rdroms.ietf@gmail.com> wrote:
> I came across a new puzzle while re-reading draft-ietf-roll-minrank-hysteresis-of.
>
> "Node energy" doesn't appear to be listed as an additive metric in RFC 6551.  Reading the description of the node energy metric, which carries remaining battery capacity as a percentage of initial capacity, I have no clue how a node using MRHOF would compute a path cost based on node energy.  Does node energy really fit as one of the metrics that MRHOF can use?

One could certainly add up the node energy for all the links, however,
it is probably better to use the path that maximized the minimum
energy along the path as suggested in RFC 6551. If so, MRHOF would not
be the best OF to use when one uses node energy as the metric.

- om_p

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