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

Hi Pascal,

Is fragmentation an issue in lpwan also?
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?

Regards,

Behcet

On Wed, Jul 19, 2017 at 8:53 AM, Carsten Bormann <cabo@tzi.org> wrote:

> We need to do at least the first two of three things:
>
> (1) Write up how fragment forwarding works today (those implementation
> techniques are currently not documented in a way that is very accessible to
> new implementers).
>
> (2) Look at the timing considerations governing burst packet transmission
> to a forwarder and paced fragment forwarding.  Can we derive guidelines for
> implementers or even standardize something (BCP or PS level)?  This
> requires finding (and possibly conducting) pertinent research.
>
> (3) Look at the use cases that would benefit from multi-hop fragment
> retransmission (we have fragment retransmission today, but only single-hop,
> and only for unicast).  If we find any such use cases, document their
> characteristics, and try to find solutions that have ways to resolve
> interactions with (2) and with transport-layer retransmission timers.  This
> requires way more research.
>
> We also could look at better supporting ECN and other issues that come up
> in tunneling-like environments.
>
> Grüße, Carsten
>
>
> > On Jul 18, 2017, at 18:34, Samita Chakrabarti <samitac.ietf@gmail.com>
> wrote:
> >
> > Dear all:
> >
> > At IETF99 6lo wg meeting 6lo-chairs discussed a few questions in order
> to sense WG interests for further work on fragmentation - especially for
> route-over topology.
> > The details charter for the design team will be finalized soon.
> > However, the 6lo-chairs are collecting names for the interested
> individuals for the design team. We might need 4-5 person design team and
> prior experience on packet forwarding is helpful.
> >
> > We are requesting the following :
> > * Send your ideas to the list on what you want to see resolved by the
> fragmentation design team
> >
> > * If you have any prior experience on 6lowpan fragmentation work on
> router-over or mesh-under please send information about it
> >
> > Thanks,
> > Gabriel & Samita
> >
> > Reference slides from today's session:
> >
> > https://www.ietf.org/proceedings/99/slides/slides-99-6lo-wg-discussion-
> questions-on-6lo-fragmentation-work-and-scoping-01.pdf
> >
> > https://www.ietf.org/proceedings/99/slides/slides-
> 99-6lo-6lowpan-fragment-forwarding-in-route-over-multi-hop-topology-00.pdf
> >
> >
> >
> >
> > _______________________________________________
> > 6lo mailing list
> > 6lo@ietf.org
> > https://www.ietf.org/mailman/listinfo/6lo
>
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