# Connection details


## Meeting Information

* Date: Feb 2nd 2021; 7-8am US Pacific PST, 4pm CET:
https://www.worldtimebuddy.com/?qm=1&lid=100,12,5392171,1850147&h=100&date=2021-02-02&sln=15-16
* Meeting Recording link: https://ietf.webex.com/ietf/ldr.php?RCID=ab720119aa864d61a0d536ab821c918d

# Action items
## Next
## Last
* change the NBIOT target date to early 2022
* * Find 3GPP assistance for Ana on NBIOT (Eric + Pascal) on hold
* Laurent to refresh the model draft and the chairs to ask to an early review by YANG Doctors via datatracker


# To do

Laurent to send a doodle on the ML to choose a time for a session on YANG

# Bluesheets

* Éric Vyncke, Cisco
* Alexander Pelov, Acklio
* Pascal Thubert, Cisco
* Laurent Toutain, IMT Atlantique
* Georgios Papadopoulos, IMT Atlantique
* Dominique Barthel, Orange
* Julien Catalano, Kerlink
* Carles Gomez, Universitat Politecnica de Catalunya
* Carsten Bormann
* Juan Carlos Zúñiga, Sigfox
* Olivier Gimenez, Semtech
* Sergio Aguilar
* Ana Minaburo, Acklio
* Sergio Aguilar
* Edgar Ramos, Ericsson



(last interims for copy/paste)


* Diego Dujovne, UDP
* Edgar Ramos, Ericsson
* Paul Duffy, Cisco
* Vincent Audebert, EDF
* Alexander Pelov, Acklio
* Ivaylo Petrov, Acklio
* Arunprabhu Kandasamy, Acklio
* Sean Turner, sn3rd
* J Lecoeuvre
* David Millman
* Ricardo Andreasen
* Arthur Oval


# Agenda

## [16:05] Administrivia                [10min]
### Note-Well, Scribes, Agenda Bashing
### WG Status

## [16:10] SCHC over LoRaWAN 								[15min]

## [16:25] CoAP over SCHC	 								[20min]

## [16:45] Field Length in SCHC	 				           	[10min]

## [16:55]   AOB 				             				[ QS ]


# Minutes

## [16:05] Administrivia                [10min]

Alexander gives the usuual intro script, this is an aofficial IETF meeting BCPs apply (inc. IPR). No recording. Meetings minutes captured here.

### Note-Well, Scribes, Agenda Bashing
Laurent suggests to talk about the Yang document.
Minutes of last meeting approved
### WG Status

OAM draft not yet a WG document. Document to be reviewed and brought back to the WG's attention.

Yang draft, version 4 published. Need a work session with interested parties.


## [16:10] SCHC over LoRaWAN 								[15min]

Olivier: Limited change; editorial clarification. Also an IID-related update. Support of the proposed IID derivation algo is a MUST, using it is a SHOULD.
Fixing the hexa: the new value is confirmed; the current plan is to wait for AUTH 48 to inject the correction. Suggestion to send the fixed XML now to the RFC Editor before they start editing it.

## [16:25] SCHC Header Compression in 6lo(WPAN) Environment	 								[20min]

Carles: using SCHC HC in 6LoWPAN space. Carles presents history (see slides)
Carles: Add SCHC compression in addition to 6Lo HC

Might consider a SCHC HC dispatch. Use the page selector, use a whole page?

Carles: can go from 7 to 2 bytes
Pascal: SCHC can compress also other layers, so the gain can potentially be more imporant.
Pascal: SCHC is stateful - you need preparation. 6LoWPAN is stateless - you don't need any previous setup (any-to-any). So it's really a different usage: RFC 6282 is minimum preparation minimum win. SCHC is max preparaion, node specific etc... but max win as well.
Carles: in terms of context, even in 6LoWPAN if you have global addresses, you still need some kind of contexts, or infrasturcture with ND to discover this common context.
Carles: effect of the compression on battery lifetime, from theoretical point of view.
Carsten: what's the use of using 6LP then SCHC?
Laurent: An example would be for mesh networks to use 6LP to route the packets on the IP layer, and use SCHC for the compression of the upper layers
Pascal: RFC8138 is what you want to cross the mesh (on route-over)
Carsten: That may need a lot of thinking to get right
Pascal: need use-cases
Alexander: The work seems a good thing to pursue, need to clear up the targeted use-cases
Alexander: the home WG would be 6LO?
Carles: yes, 6LO
Alexander: advance the work in LPWAN, make sure we agree that it's good enough, then ask for adoption in 6LO, and ensure WGLC in 6LO and LPWAN
Eric: yes, agreed. Need to double-check on the 6LO charter of course. Working Group Last Call should be done in 6LO and LPWAN.


## [16:55] Field Length in SCHC	 				           	[5min]
See slides; Laurent suggests to keep the existing IGNORE as is and create anew matching operator MATCH_LENGTH so that the rule indicates the length of teh variable length field.

## [16:55]   AOB 				             				[ QS ]