Re: [manet-dlep-rg] Latency

"Taylor, Rick" <Rick.Taylor@cassidian.com> Tue, 12 November 2013 13:43 UTC

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From: "Taylor, Rick" <Rick.Taylor@cassidian.com>
To: Henning Rogge <hrogge@googlemail.com>, Teco Boot <teco@inf-net.nl>
Thread-Topic: [manet-dlep-rg] Latency
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Date: Tue, 12 Nov 2013 13:43:07 +0000
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Cc: "DLEP Research Group (manet-dlep-rg@ietf.org)" <manet-dlep-rg@ietf.org>, Stan Ratliff <sratliff@cisco.com>
Subject: Re: [manet-dlep-rg] Latency
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>From my experience:

My test DLEP devices just make up a number (not very helpful)

The radios I have used that support DLEP-00 natively report a latency in ms.  What that really is I have no idea.  Again, not very useful.

I have my own DLEP proxy for some other radios, and I have just reported half of RTT on my control packets, which given I have jitter and back-off, again isn't very useful.

BUT, Having a latency metric, even if it is almost meaningless, is better than no metric at all.

I could suggest 100ms * hop-count works in mesh radios, as one of the simplest uses of latency is as an improved hopcount for split-horizoning in routing protocols.

It's amazing what one will try to use, even if the quality of the data is very poor!

Rick Taylor

> -----Original Message-----
> From: manet-dlep-rg-bounces@ietf.org [mailto:manet-dlep-rg-
> bounces@ietf.org] On Behalf Of Henning Rogge
> Sent: 12 November 2013 13:23
> To: Teco Boot
> Cc: DLEP Research Group (manet-dlep-rg@ietf.org); Stan Ratliff
> Subject: Re: [manet-dlep-rg] Latency
>
> Yes, I heard this too in the MANET Meeting...
>
> which made me wonder a bit because I was puzzled what was the
> difference between the two.
>
> Can maybe the people who already have an implementation for DLEP tell
> us what kind of Latency they implemented?
>
> Henning Rogge
>
> On Mon, Nov 11, 2013 at 5:15 PM, Teco Boot <teco@inf-net.nl> wrote:
> >
> > Op 11 nov. 2013, om 01:55 heeft Stan Ratliff (sratliff)
> <sratliff@cisco.com> het volgende geschreven:
> >
> >> Point 11 - I didn't hear that. Really, I didn't hear any conclusions
> about Latency. Other opinions?
> >
> > We discussed it and all speakers said it is an important metric, so it
> will be an optional TLV in core document.
> >
> > Wasn't Henning tasked with verifying Latency and EFT?
> >
> > Teco
> >
> > _______________________________________________
> > manet-dlep-rg mailing list
> > manet-dlep-rg@ietf.org
> > https://www.ietf.org/mailman/listinfo/manet-dlep-rg
>
>
>
> --
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