Re: [6tisch] macLinkType for the minimal configuration (draft-ietf-6tisch-minimal-16)

Hi, I jump in :)

We discussed this. We said to use NORMAL in order to support any type of
packet in the minimal cell/s and not only EBs. From our discussions, I
think that we all understood (at least is what I captured in the minimal
text) that if the type is NORMAL we can also send EBs there and hence we
discarded ADVERTISEMENT type.

A clarification of these will be really valuable now that I will proceed
with the revision of minimal.

regards,
X

2016-11-20 18:30 GMT+01:00 Thomas Watteyne <thomas.watteyne@inria.fr>:

> Yatch,
>
> Good point, indeed. The cell draft-minimal uses is indeed used for two
> things: EBs and other frames. The question can we reformulate as "if we set
> it to ADVERTISING, are we allowed to send non-EB frames on it" and "if we
> set it to NORMAL, are we allowed to send EB frames on it".
>
> From the excerpts you cite, it looks like ADVERTISING makes more sense. Of
> course, we are heavily in IEEE territory with this question, so we, as
> 6TiSCH, cannot really answer. @Pat, could you circulate this point in the
> IEEE 6T IG so we can get an official recommendation on the matter from the
> IEEE.
>
> If the decision is to set the cell to "ADVERTISING", I will add an issue
> and ask  the authors of draft-minimal to make the change.
>
> Thomas
>
> On Fri, Nov 18, 2016 at 12:59 AM, Yasuyuki Tanaka <
> yasuyuki9.tanaka@toshiba.co.jp> wrote:
>
>> Thank you for your comment, Pat!
>>
>> I noticed your message wasn't on the ML; I paste it here.
>>
>> On 2016/11/17 16:40, pat.kinney@kinneyconsultingllc.com wrote:
>>
>>>
>>> Yasuyuki brings up a very good point.  A major effort in creating
>>> 802.15.4-2015 was to eliminate (at least try to) ambiguities.  As
>>> per the IEEE style guide: "The word may is used to indicate a course
>>> of action permissible within the limits of the standard (may equals
>>> is permitted to ).”  The LinkType wording was modified to clarify
>>> when to use normal and when to use advertisement.  As per Yasuyuki
>>> Table 8-46 does state that "Set to ADVERTISING if the link is to be
>>> used to advertise the network, otherwise set to NORMAL.”  I should
>>> note that the text in that sub-clause adds " If LinkType is set to
>>> ADVERTISE, the links may be used to send Enhanced Beacon frames as
>>> the result of the MAC receiving a MLME-BEACON.request.”  The intent
>>> of 802.15.4-2015 was not meant to change the meaning of LinkType,
>>> rather it was meant to clarify.
>>>
>>> So, Yasuyuki’s question is indeed valid, should the minimal
>>> configuration set the LinkType set to Advertising?
>>>
>>> Pat
>>>
>>> Pat Kinney
>>> Kinney Consulting LLC
>>> IEEE 802.15 WG vice chair, SC chair
>>> ISA100 co-chair, ISA100.20 chair
>>> O: +1.847.960.3715
>>> pat.kinney@kinneyconsultingllc.com
>>>
>>
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>
>
>
> --
> _______________________________________
>
> Thomas Watteyne, PhD
> Research Scientist & Innovator, Inria
> Sr Networking Design Eng, Linear Tech
> Founder & co-lead, UC Berkeley OpenWSN
> Co-chair, IETF 6TiSCH
>
> www.thomaswatteyne.com
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>

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Dr. Xavier Vilajosana Guillén
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Wireless Networks Research Group
Internet Interdisciplinary Institute (IN3)
Universitat Oberta de Catalunya

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