Connection details ------------------ * Date: March 13, 2019 * Time: 8-9 Ana Pacific, 17:00 CET: https://www.worldtimebuddy.com/?qm=1&lid=100,5392171,212,6&h=100&date=2019-03-13&sln=16-17 * Webex Link: https://cisco.webex.com/cisco/j.php?MTID=m884e9421ae0947fc7775dd30a39ce4a4 * Meeting number (access code): 209 036 844 * Meeting password: kCZVP3vu (52987388 from phones) Minute takers ------------- * Carles Gomez * Pascal Thubert Attendees --------- * Alexander Pelov * Laurent Toutain * Carsten Bormann * Pascal Thubert * Carles Gomez * Ivaylo Petrov * Vincent Audebert * Ana Minaburo Attendees (last time) --------- * Edgard Ramos * 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 Action Items ---------------------------- Agenda ------ * [17:05] Administrivia [10min] o Note-Well, Scribes, Agenda Bashing o Status of drafts o IETF 104 * Alex going though the note well * PAscal : as Carsten is there maybe we could lok at his review. But then Dominique is not with us today so that's mostly if Laurent has questions. * LT: I don't see big issues in Carsten's comments. We are going to work on how we represent the rules (at compressor and decompressor) * CB: specific data model for the rule in a separate draft? * LT: yes * Alex: Happy that there is no major issue so far. Hopefully the fragmentation part is as readable as the header compression part. * Alex: the main agenda item for today is the data model * PT shows the draft agenda for IETF 104, discusses with Laurent and Ivaylo the time for some slots * Alex: I think the agenda is good as it is now (regarding available time) * Alex presenting progress vs. charter. Sounding good; preparing ot recharter * Alex: Charlie's draft (SCHC over 15.4w) has not been updated * PT: Charlie gives two kinds of presentations: about the draft, and about the standardization status of IEEE 802.15.4w. We can ping him regarding both * Alex: there is a conflict between t2trg and lpwan (collision in the agenda). * CB: I don't think I'll be able to attend lpwan * Alex: if you have comments, it would be good if you can give them to the presenters in advance * [17:15] Data model for SCHC (Laurent). [20min] * LT: I updated the draft on the YANG model we had some time ago, but on today's slides I add more content * LT: lots of questions on the Rule (SCHC draft), how it can be defined more precisely * LT: my proposal is an attempt to show how we can define the Rule for compression and fragmentation * LT presents Rule ID structure (raw-wise: Field id, FL, FP, DI, Target Value, Matching Operator, CDA) * LT presents YANG tree for the Rule. Three parts: Rule ID and length, fragmentation and compression. * PT we don't have to be economical on the values of the size of the data model * LT: the goal is to have a shorter size for the Rule ID * PT: maybe using 32bits for the rule ID enables more scenarios? * AP: the representation is in CBOR so a larger rule id size is not an issue * LT: 2 ways to represent a Field ID: enumeration (may have short representation but problems for extending it); another solution is using sid values, which are unique by definition. * AP: to me it is clear, very helpful. * LT: Field ID extension - for CoAP we can use a negative number * CB: do you use YANG v1 ? * LT: I don't know at this time * CB: this should be on the list of things to ask to YANG doctors * PT: rendez-vous with a YANG doctor needs to be scheduled * LT presents Field Length * LT presents Target Value (Target Value is actually a list of values, needs to be corrected in the slide): many possible types... * CB: perhaps union of the various uint types... But I'm not a YANG doctor. * AP: YANG doctors will be the right ones to make this question * LT: Next steps: check validity of YANG model (ask YANG doctors), and study the impact of COREconf * PT: we can give you more time: 30 min in the agenda in Prague. * LT: when I submitted the draft, the IETF tool was checking for YANG validity * [17:35] Preparation of IETF 104 (chairs) [10min] Reviewed agenda and gave 30 minutes to Laurent's presentation * [17:45] AOB [15min] * AP: any other business? * PT/AP: Chili LPWAN restaurant after the lpwan session in Prague proposed! Minutes ------ * [17:05] Administrivia [10min] o Note-Well, Scribes, Agenda Bashing o Status of drafts o IETF 104 * [17:15] Data model for SCHC (Laurent). [20min] * [17:35] Preparation of IETF 104 (chairs) [10min] * [17:45] AOB [15min]