Re: [Roll] [6lowpan] LLN roadmap documents: more missing pieces

Abdussalam Baryun <> Wed, 13 June 2012 13:18 UTC

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Date: Wed, 13 Jun 2012 14:18:35 +0100
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From: Abdussalam Baryun <>
To: Michael Richardson <>, Don Sturek <>
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Subject: Re: [Roll] [6lowpan] LLN roadmap documents: more missing pieces
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Hi Michael, Don, and all,

>What Carsten said was that some kind of roadmap was necessary.
I agree with Mr.Carsten,

>I want to ask if it belongs in ROLL or 6lowpan.
IMHO, it belongs to 6lowpan WG first, and it MAY be for ROLL as well,
overall, I think the WG AD can give us the best feedback and suggestion.

>For sure, I don't think 6LoWPAN is the right
>place since this protocol can work over mesh networks
>that are not necessarily employing 6LoWPAN.

if the protocol can work else than 6LoWPAN, then
IMHO we should let each group face its use-case problems,
not to give a protocol that works in many conditions to
only one WG or two. Each WG SHOULD look at its purpose case
for any particular protocol (as needed to be used is such area).

>the ZigBee Core Stack working group

I am looking for the group, but not found,
this group is not an IETF group yet !

I don't see the IETF has a cooperation with Zigbee standards. If I am
please inform me, IMO we should not depend on the Zigbee-WG, until it
becomes IETF WG,

Therefore, the work you pointed to, should be considered by both 6LoWPAN
and ROLL.


Abdussalam Baryun,
University of Glaorgan, UK.

On Tue, Jun 12, 2012 at 8:39 PM, Michael Richardson

> In a private (IM) chat between Carsten Bormann and I, we realized that
> there
> was prescious little consensus about what building blocks will be used
> where.
> For instance, I have assumed that a ROLL RPL network would not need
> the ND parts of 6lowpan-ND, only the DAD parts (if DAD was important).
> That ND was unnecessary in for RPL nodes as the DAOs and DIOs served the
> same purpose.  This surprised some others.  What Carsten said was that
> some kind of roadmap was necessary.
> In another hallway conversation at Paris, I came to understand that for
> layer-2==Zigbee, that on Zigbee Controllers would ever need to run RPL,
> and that the regular nodes (such as light switches, forgive me, I do not
> recall their Zigbee name), would only communicate with a controller.
> This in contrast to what I know the home automation/P2P people are
> doing.
> Finally, I wanted to bring your attention to
>  draft-kelsey-intarea-mesh-link-establishment-03.txt
> which I'm told 6man is supposed to consider.
> On some networks you can not send the DAOs or NDs out until you do this.
> I want to ask if it belongs in ROLL or 6lowpan.
> --
> Michael Richardson <>ca>, Sandelman Software Works
> IETF ROLL WG co-chair.
> _______________________________________________
> 6lowpan mailing list