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Re: [6lo] 6lowpan Fragmentation design team interest?

Carsten Bormann <cabo@tzi.org> Thu, 20 July 2017 07:53 UTC

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From: Carsten Bormann <cabo@tzi.org>
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Date: Thu, 20 Jul 2017 09:52:33 +0200
Cc: Pascal Thubert <pthubert@cisco.com>, Samita Chakrabarti <samitac.ietf@gmail.com>, Gorry Fairhurst <gorry@erg.abdn.ac.uk>, lo <6lo@ietf.org>
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Subject: Re: [6lo] 6lowpan Fragmentation design team interest?
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> On Jul 20, 2017, at 09:45, Behcet Sarikaya <sarikaya2012@gmail.com> wrote:
> 
> Hi Pascal,
> 
> Is fragmentation an issue in lpwan also?

Definitely, and there is a draft for that:

  LPWAN Static Context Header Compression (SCHC) and fragmentation for
                              IPv6 and UDP
               draft-ietf-lpwan-ipv6-static-context-hc-05

The tradeoffs are rather different there, so I’m not sure that the lpwan work applies to 6lo.

> If yes, maybe a joint DT can be formed.
> 
> Another question: I think we are talking about 802.15.4 maximum frame size of 127 limitation here, is that right?

The fragmentation scheme is general, but that number is the ballpark of the fragment size this would address (which is very different from LPWAN).

Grüße, Carsten

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