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Re: [dtn-interest] Bad Clock Vs. Clock rating (0)

<l.wood@surrey.ac.uk> Tue, 17 May 2016 00:24 UTC

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From: l.wood@surrey.ac.uk
To: dtn-interest@irtf.org, nikansell00@gmail.com, shyambs85@gmail.com
Thread-Topic: [dtn-interest] Bad Clock Vs. Clock rating (0)
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Date: Tue, 17 May 2016 00:24:14 +0000
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Archived-At: <http://mailarchive.ietf.org/arch/msg/dtn-interest/TIkSOwwS_KW7Lu-HN3X9GjyT3Jo>
Subject: Re: [dtn-interest] Bad Clock Vs. Clock rating (0)
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I was wrong, and I'd like to take this opportunity to apologise to the list for being wrong and to correct my mistake.


It was SEVEN years ago that we pointed out the fundamental problems with the bundle protocol's reliance on clocks and synchronization in our 'A Bundle of Problems' paper....


http://personal.ee.surrey.ac.uk/Personal/L.Wood/dtn/bundle.html

http://dx.doi.org/10.1109/AERO.2009.4839384



Lloyd Wood
http://about.me/lloydwood


________________________________
From: dtn-interest <dtn-interest-bounces@irtf.org> on behalf of l.wood@surrey.ac.uk <l.wood@surrey.ac.uk>
Sent: Monday, 16 May 2016 11:25 AM
To: dtn-interest@irtf.org; nikansell00@gmail.com; shyambs85@gmail.com
Subject: Re: [dtn-interest] Bad Clock Vs. Clock rating (0)


Five years ago we pointed out the fundamental problems with the bundle protocol's reliance on clocks and synchronization in our 'A Bundle of Problems' paper.


http://personal.ee.surrey.ac.uk/Personal/L.Wood/dtn/bundle.html

http://dx.doi.org/10.1109/AERO.2009.4839384


People are still trying to use it and work around its clocking? As Australians say: so tragic.
<http://dx.doi.org/10.1109/AERO.2009.4839384>



Lloyd Wood
http://about.me/lloydwood
________________________________
From: dtn-interest <dtn-interest-bounces@irtf.org> on behalf of Nik Ansell <nikansell00@gmail.com>
Sent: Wednesday, 11 May 2016 2:07:49 PM
To: dtn-interest@irtf.org
Subject: Re: [dtn-interest] Bad Clock Vs. Clock rating (0)

A good way to get in touch with the IBR-DTN guys is to use the mailing list below.

ibr-dtn@ibr.cs.tu-bs.de<mailto:ibr-dtn@ibr.cs.tu-bs.de>

The main admin page for the mailing list is here: https://mail.ibr.cs.tu-bs.de/mailman/listinfo/ibr-dtn

Kind Regards,
Nik

On Tue, May 10, 2016 at 11:00 PM, <dtn-interest-request@irtf.org<mailto:dtn-interest-request@irtf.org>> wrote:
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Today's Topics:

   1. Re: Bad Clock Vs. Clock rating (0) (Joerg Ott)


---------- Forwarded message ----------
From: Joerg Ott <jo@netlab.tkk.fi<mailto:jo@netlab.tkk.fi>>
To: Shyam B <shyambs85@gmail.com<mailto:shyambs85@gmail.com>>, dtn-interest@irtf.org<mailto:dtn-interest@irtf.org>
Cc: kfall@kfall.com<mailto:kfall@kfall.com>
Date: Tue, 10 May 2016 07:19:16 +0200
Subject: Re: [dtn-interest] Bad Clock Vs. Clock rating (0)
I wo¨ld ask the IBR-DTN folks...

On 10.05.16 01:37, Shyam B wrote:
Hello All,

Thanks for the evolving community of DTN. I hope someone can help me
with the questions below:

How to remove time synchronization between nodes on later versions of
IBRDTN:
We are using the latest version(s) of IBRDTN on OpenWRT. I read from the
change log "Version 1.0.1 (2015-02-24)" that BAD CLOCK has been replaced
by something called clock rating (set to 0).

1) I would like to know where and how can I set this clock rating to 0
on a node? Is it to be set in the "ibrdtn.conf" file or somewhere else -
any specifics will be helpful.

2) I believe this will need to be set "on each node" and the dtnd daemon
would read this during its initiation at run-time to bypass any clock
synchronization needed to receive bundles/ as well as dtnping, am I right?

NOTE: We do not require clock synchronization to keeping our scenarios
simple. Just need a way to pass bundles between nodes "under any
circumstance".

Reference:
https://trac.ibr.cs.tu-bs.de/project-cm-2012-ibrdtn/wiki/changelog

Thanks for your time. Hope someone can help us soon!

--
Regards,
Shyam, B




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