Re: [lp-wan] Architecture

Carles Gomez Montenegro <carlesgo@entel.upc.edu> Tue, 28 June 2022 16:35 UTC

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Date: Tue, 28 Jun 2022 18:35:09 +0200
From: Carles Gomez Montenegro <carlesgo@entel.upc.edu>
To: Laurent Toutain <laurent.toutain@imt-atlantique.fr>
Cc: lp-wan <lp-wan@ietf.org>
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Subject: Re: [lp-wan] Architecture
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Hi Laurent,

Thanks a lot for bringing up this topic!

Please find below some inline comments:

<snip>

> Carles raised the need to study a more generic approach for mesh network
> where the notion of device and SCHC core do not exists anymore and rules
> are more an association between a device and a core. This may be solved by
> identifying the set of rules by a device ID and a core ID.

I think your proposal is equivalent to determining which is the role (Dev
or App) of each endpoint for a given Rule.

In fact, we will soon submit a revised version of
draft-gomez-6lo-schc-15dot4-02. In -03, the idea to address the Dev/App
problem (i.e., which is the Dev or App role of a node in a mesh or
peer-to-peer network) is simply to stick to what we called Option 1 in
IETF 113 (i.e., sticking to the RFC 8724 terms) and define/configure
beforehand who will be Dev and who will be App when a Rule is written
(since the Rule is written beforehand anyway).

So I understand that we are aligned!

<snip>

> In my opinion, we should specify on the architecture document, a more
> generic model covering PPP, star and mesh and also more precisely the
> interaction between them. From that, we will be able to define an
> augmentation of the basic data model.

I was thinking the same. The architecture document needs to cover all
these topologies.

> The way we include a mesh model with SCHC can be an interesting thing to
> investigate during the hackathon.

Cool! :)

Cheers,

Carles


> See you,
>
> Laurent
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