Minutes interim-2019-lpwan-08: Wed 16:00
minutes-interim-2019-lpwan-08-201905291600-00

IConnection details
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•        Date: May 29th, 2019, 7-8am US Pacific, 4pm CEST:
http://www.worldtimebuddy.com/?qm=1&lid=100,12,5392171,1850147&h=100&date=2017-05-29&sln=14-15
•        Webex Link:
https://cisco.webex.com/webappng/sites/cisco/meeting/info/128161733217923100?MTID=md113c4cf1f5c72a31e4042afc5600e79
•        Meeting number (access code): 203 753 214 •        Meeting password:
yjmufJAQ (95683527 from phones)

Minute takers
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* Alexander
* Carles
* Ana
* Pascal
* Dominique

Attendees
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* Alexander Pelov
* Ana Minaburo
* Carles Gomez
* Dominique Barthel
* Ivaylo Petrov
* Laurent Toutain
* Pascal Thubert
* Klaus Hartke
* Nestor Ayuso
* Diego Dujovne

Attendees (last time)
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* Edgard Ramos
* Carsten Bormann
* Julien Catalano
* Alexander Pelov
* Ana Minaburo
* Arunprabhu Kandasamy
* Carles Gomez
* Diego Dujovne
* Dominique Barthel
* Ivaylo Petrov
* Juan Carlos Zuniga
* Laurent Toutain
* Pascal Thubert
* Vincent Audebert
* Nestor Ayuso
* Klaus Hartke

Action Items from Last time
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* Re-ping Suresh & reviewers directly
* Re-ping Carsten

Action Items
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* Alex to update the minutes from last time per Ivaylo's point

Agenda
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[16:05] Administrivia                [ 5min]
    o    Note-Well, Scribes, Agenda Bashing
    o    Status of drafts

[16:10] draft-ietf-lpwan-schc-over-lorawan-00 (Ivaylo)          [30min]
[16:40] draft-ietf-lpwan-coap-static-context-hc-07 (Ana)        [10min]
[16:50] AOB                                                     [10min]

Minutes
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[16:05] Administrivia                [ 5min]
    o    Note-Well, Scribes, Agenda Bashing
    o    Minutes of last meeting: minor corrections from Ivaylo. Alex will
    update the minutes. o    Status of drafts
Alex: Two pending reviews from directors for SCHC-18
Alex:once Suresh completes his AD review, he will send the IETF last call
Dominique: DLMS already has UDP over IP profile. The shortest path to
DLMS/LoRaWAN is DLMS/UDP/IP/(SCHC)/LoRaWAN. Dominique: LoRa Alliance needs
"SHCH for UDP/IP" and "SCHC over LoRaWAN" to be RFC's to complete the
specification of DLMS over LoRaWAN. Alex: timeframe for SCHC published as an
RFC could be approx September? Dominique: Carsten only sent part of his
reviews, do we wait for more reviews before re-spinning the draft? Pascal: We
complete 2 reviews and then we get the last call in order to do not have twice
the same comments Laurent: Now there are some pending comments? Dominique: we
agreed on how to address Carsten's comments, but we still have to receive his
review on the fragmentation part of the document. And also expecting an INT Dir
review. Alex: we pinged Suresh and he pinged all the reviewers. Understand that
Suresh will do the INT Dir review (instead of offloading it to somebody else).

[16:10] draft-ietf-lpwan-schc-over-lorawan-00 (Ivaylo)          [30min]
-8 authors now,
Pascal: ask to put one editor and the others as contributors
Pascal: who is the editor?
Ivo: Olivier has made most of the last changes
Alex: could we have two editors?
Pascal: yes,look at the 6tisch architecture
Ivaylo: updates since last document publication. Architecture,
Ivaylo: IETF terminology -> LoRaWAN terminology update. Having the terminology
avoids having to move between the documents (lpwan overview) Ivaylo: more LoRa
addressing and MAC layer information Ivaylo: Change in FPort processing. FPort
down and Up - now one extra (FPort short) -> shorter headers for smaller
packets. One other FPort for IPv6 max payload size. Ivaylo: every
implementation should be able to support 6-bit Rule IDs Ivaylo: Open question -
IID Computation - are there any recommendations ? Pascal: every time there is a
document on IID in 6TSCH, there is a review from Dave (who wrote RFC 8065)Taler
on questions related to privacy. Pascal: it would be great to have a
negotiation between the server and the device to have both agree on the device.
Or have a computation on both end-device and core, which provide the same IID.
Pascal: the computation may be some hash function for example. Ivaylo: now uses
ACK-on-Error instead of ACK Always for uplink fragmentation (downlink
fragmentation is still using ACK Always) Ivaylo: added a 1-bit DTag Ivaylo:
List of fragmentation parameters (should be easier for readers) Ivaylo: Having
an ACK format slighly differnt from the one in the SCHC document was discussed.
The idea is to use the C bit in case there are no losses (not sure). Dominique:
there is a C bit in all ACKs. Compressing trailing zeros in the bitmap. Another
thing discussed with Olivier was that it is possible to have 5-bit Rule IDs for
fragmentation Laurent via the chat: -00 does not reflect what Ivaylo said
Ivaylo: I'm presenting changes for -01 (not yet published). It's on github,
anyway. [Ivaylo shares the github link via the chat:
https://github.com/Acklio/schc-over-lorawan/tree/draft-version-04] Ivaylo: plan
is to publish -01 before the next IETF cut-off date. Reviews would be great.
Laurent: Will take a look Dominique will also review Pascal: Ivo & Olivier
produce the text, Dominique and Laurent will do the review it is in line with
SCHC.

[16:40] draft-ietf-lpwan-coap-static-context-hc-07 (Ana)        [10min]

Klaus: would be great if this presentation can be given at the CoRE interim
meeting starting in just a few minutes

Ana: published -07, addressed issues with RFC 2119 language
Ana: WGLC has started

Klaus: I have a bunch of questions. Hope you can answer them in the CoRE
meeting. Ana: sure!

[16:50] AOB                                                     [10min]

Alexander: I corrected the minutes. Ivaylo, please double check.