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Re: [6tisch] [Call for Review] draft-ietf-6tisch-msf-03

Atis Elsts <atis.elsts@gmail.com> Tue, 09 April 2019 11:06 UTC

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From: Atis Elsts <atis.elsts@gmail.com>
Date: Tue, 09 Apr 2019 14:06:13 +0300
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To: Tengfei Chang <tengfei.chang@gmail.com>
Cc: 6tisch@ietf.org
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Subject: Re: [6tisch] [Call for Review] draft-ietf-6tisch-msf-03
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Hello Tengfei and the 6tisch community,

I'm happy to see the frame pending bit removed and other big improvements
in clarity and functionality.

Following up on my other previous comments,
- There is still one reference left to the number 16 as the max number of
channels (which 2.4 GHz frequency-band-specific). It's in the formula
`channelOffset(MAC) = hash(EUI64, 16)`. This may conflict with the
intention expressed previously in the text, where you say that "the
coordinates are computed to distribute the cells across all channel
offsets" (i.e. not exactly 16 channel offsets)
- Have you considered suggesting that the implementers to prioritize 6top
packets over data packets?
- Have you considered providing a recommended value for MAX_NUMCELLS or
discussing how to select it?

Minor new comments:

- The parameter KA_PERIOD from the recommended values is not referenced in
the main text.

- There are a number of typos in the text, for example:
 Boradcast -> Broadcast
 maxmium -> maximum
 calcualted -> calculated
 bewteen -> between

Best regards,
Atis



On Tue, Apr 9, 2019 at 7:06 AM Tengfei Chang <tengfei.chang@gmail.com>
wrote:

> Dear all,
>
> A new version of "draft-ietf-6tisch-msf" is just published at here:
> https://www.ietf.org/id/draft-ietf-6tisch-msf-03.txt
>
> This version mainly resolved the issues presented during IETF 104 meeting.
> I would like to mention one of the main changes in this version is we
> removed the frame pending bit feature.
>
> It's for two reasons:
> - it will influence the "adapt to traffic" strategy of MSF.
> - the "adapt to traffic" strategy has the ability to handle burst traffic
> by using a smaller MAX_NUMCELLS
>
> Now we are calling for reviews on the new version of MSF!
> Any comments and feedback are appreciated!
>
> Tengfei
>
>
>
> --
> Chang Tengfei,
> Postdoctoral Research Engineer, Inria
> _______________________________________________
> 6tisch mailing list
> 6tisch@ietf.org
> https://www.ietf.org/mailman/listinfo/6tisch
>

--
Dr. Atis Elsts
Researcher, Institute of Electronics and Computer Science (EDI)
Dzerbenes str. 14, Riga, LV-1006

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