# Meeting Information



Data / Time
-----------
+ Date: January 25th, 2022
+ Time: [7-8am US Pacific PST, 4pm CET](https://www.worldtimebuddy.com/?qm=1&lid=100,12,5392171,1850147&h=100&date=2022-01-25&sln=15-16)



Meeting Information
-----------

+ Date: January 25th, 2022
+ Time: [7-8am US Pacific PST, 4pm CET](https://www.worldtimebuddy.com/?qm=1&lid=100,12,5392171,1850147&h=100&date=2022-01-04&sln=15-16)

+ Agenda: [on datatracker](https://datatracker.ietf.org/meeting/interim-2022-lpwan-02/materials/agenda-interim-2022-lpwan-02-lpwan-01-01.md)

+ Meeting material: [on datatracker](https://datatracker.ietf.org/meeting/interim-2022-lpwan-02/session/lpwan)

+ Meeting link: [Webex Link](
https://cisco.webex.com/cisco/e.php?MTID=m44d31a412d0b1fc04acd0760d7d2f3d4)


+ Live Minutes: [CODIMD Link](https://notes.ietf.org/notes-ietf-interim-2022-lpwan-02-lpwan#)

# Interim Agenda

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

## [16:10] Compound Ack publication steps           [25min]
* data Model
* Dominique's review
* Shepherd selection
* IPR

## [16:35] YANG Data Model WGLC steps               [20min]
* Dominique's review
* Timing

## [16:55] AOB                                      [ QS ]

# Attendees
* Pascal Thubert
* Alexander Pelov
* Éric Vyncke
* Dominique Barthel
* Juan-Carlos Zúñiga
* Carles Gomez
* Ana Minaburo
* Ivan Martinez
* Laurent Toutain
* Sergio Aguilar


# Minutes

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

Alexander does the usual agenda bashing.


## [16:10] Compound Ack publication steps           [25min]
* data Model
* Dominique's review
* Shepherd selection
* IPR poll/declaration

Pascal reviews conclusions from last meeting. (slide 8)
JCZ: was not able to attend last meeting, got debrief from Sergio. Discussed between the authors.
Pascal: the objective of the OLD/NEW is to have a formal explanation of what you want to achieve. It leaves some questions how to implement the changes.
JCZ: there is already the normative language, but didn't want to repeat text.
Dominique: The juxtaposition of this text and RFC 8724 can be ambiguous; I agree that 3.2.1 and 3.2.2 become informational (no uppercase) and to have a 3.2.3 which unambiguously describes what 8724+compound_ack looks like. Think of a patch file that rewrites RFC8724's text.
JCZ: useful feedback. We will do the changes
Pascal: Did not find a shepherd. Polled the int directorate, but no answer.
Éric: polling the call to find a candidate; no answer :-(
Alexander: to do poll the mailing list
JCZ: we will nee to update the data model
Laurent: I made the change, I need to send to you.


## [16:35] YANG Data Model WGLC steps               [20min]
* Dominique's review
* Timing

Laurent: pushed new stuff on the github; unstable so not pushed to datatracker.

### Introduced a compression feature

Edgar does not use compression in his doc, better make it a feature, like fragmentation already was.
Alexander: see it as: in a switch, IP may be a feature so it's not there if the switch is pure layer 2.


### Introduced a max interleaved packets

default of 1 is suggested e.g., if we do slow start
must be less than 2^dtag_size, but not sure how to express that in YANG
Dominique: max-window-size is called window size in the RFC.
Laurent: OK
Pascal: the comment could be more informative, indicating that it is the maximum numbre of tiles

### Ack behavior

Laurent : changed to indicate that the L2 decides when to send acks


### Window size

Laurent: packaged parameters to form the frame together, then the fragmentation

### discussion on the penultimate tile

Laurent: I do not understand the penultimate tile comment

Dominique: to do: find the slides expliciting the issue and discuss next time

### Dtag lifetime

Dominique: hard to use the inactivity timer since the sender and receiver do not have the same lifetime since packets may be lost

Pascal: yes but the sender times out after the receiver so the sender is safe to reuse the dtag when it times out

Dominique: not efficient since lifetime can be long.

Dominique: to do: try to find again what the issue was with the DTag lifetime at the receiver, if there really was any issue at all.

### No compression rule

Laurent: todo : if there are compression rules (compression "feature"), then there must be a no-compression rule.


## [16:55] AOB                                      [ QS ]