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Minutes Webex 01 August 2014, 6TiSCH WG
Note: timestamps in PDT.
Taking notes (using Etherpad)
- Raghuram Sudhaakar
Present (alphabetically)
- Diego Dujovne
- Ines Robles
- James Pylakutty
- Kazushi Muraoka
- Nicola Accettura
- Pascal Thubert
- Pat Kinney
- Qin Wang
- Raghuram Sudhaakar
- Rouhollah Nabati
- Sedat Gormus
- Thomas Watteyne
Connection details
- Webex: https://ciscosales.webex.com/ciscosales/j.php?ED=219615007&UID=481905242&PW=NZTRkNDAwOTE1&RT=MiMyMw%3D%3D
- Etherpad: http://etherpad.tools.ietf.org:9000/p/6tisch?useMonospaceFont=true
- Topic: 6TiSCH Weekly
- Time: 8:00 am, Pacific Daylight Time (San Francisco, GMT-07:00)
- Meeting Number: 206 802 913
- Meeting Password: sixtus
- CCM: +14085256800x206802913
Resources
- Webex recording: https://cisco.webex.com/ciscosales/lsr.php?RCID=b61a2042a4694e70ba93fe1d68ada573 [56min]
- Wiki: https://bitbucket.org/6tisch/meetings/wiki/140801_webex
- Slides: https://bitbucket.org/6tisch/meetings/src/master/140801_webex/slides_140801_webex.ppt
Action items
- Diego to start discussion on ML about 6TiSCH session at IETF91.
Agenda
- Administrivia [3min]
- Approval agenda
- Approval minutes last call
- IEEE802.15.4 changes (Pat Kinney) [30min]
- IETF90 summary [20min]
- LLN plugfest (Ines Robles, Xavi Vilajosana) [10min]
- overview
- outcome
- coverage
- WG meetings (Thomas Watteyne, Pascal Thubert) [10min]
- overview
- outcome
- Next steps [time permitting]
- LLN plugfest (Ines Robles, Xavi Vilajosana) [10min]
- AOB [2min]
Minutes
- [08.05] Meeting starts
- [Pascal] we need a scribe
- [Raghuram] I can do that
- [08.06] Administrivia
- Recording starting
- Pascal reminds note well
- reminder: minutes, recording, attendance
- Pascal presents agenda
- Approval agenda
No issues raised. Agenda approved.
- Approval minutes last call
No issues raised. Minutes approved.
- [08.08] IEEE802.15.4 changes (Pat Kinney)
- chair of standards committee doing revision of 15.4
- presents TOC
- comments resolution is ongoing and will offer advise in this regard
- letter ballot passed
- SUN PHY, about 60 comments. Some issues left.
- schedule of revisions, will be a push to get recirculation start by 8/31.
- Will go through a lot of comments about IEs. Not sure how channel hopping IE works in vendor-independent manner.
- Security Issues in TSCH being looked at and being modified. Requests comments.
- [Thomas] requests elaboration
- [Pat] Comments on using Slot number. security issues related to this.
- Cites sections being used by TSCH in the new draft.
- Presents Channel hopping problem. One of the field lengths listed as variable.
- We need a mechanism that gives determinism. PCA could work but not written specifically for TSCH. This needs to happen.
- Upper ranges of PIB's not sufficient. Adding an octet to the whole IE.
- CCA default values are wrong.
- Presents proposed TSCH-MAC PIB default values
- [Thomas] Points out issue with default attributed not being identified correctly.
- [Pat] acknowledges
- [Pat] Discussed the default value for the timeslot template.
- [Thomas] Carrying full IPv6 packet is a good idea. There may be headers before that. So 1280 bytes may not be enough.
- [Thomas] do you consider 868MHz to be same as 915MHz?
- [Pat] Continues discussion about default values
- CCA is important problem in EU also. Carrier detect takes more time that energy detect. All amendments need to be consolidated.
- Discusses issue of wait time causing unfair channel access.
- Proposed consolidation of detection time
- [Thomas] needs to be below 802.11 duration
- [Pat] proposes 23-24us
- presents CCA threshold values and issues. Flexibility is important.
- presents IE descriptor format issues.
- presents clarification of MAC timing terms.
- [Thomas] is AIFS the new term for macACkWaitDuration?
- [Pat] acknowledges and confirms.
- Clarifying when to send Imm-ACK and Enh-ACK.
- Summarizes: Took on task of clarifying and consolidating all comments and amendments. Tyrell is taking security issues.
- [Thomas] thanks Pat. Will contact with comments.
- [08.35] IETF90 summary
- LLN plugfest (Ines Robles, Xavi Vilajosana) [10min] Ines presents
- overview: lists participants and presentations at the plugfest
- outcome:
- Drafts were presented
- Interest generated in the area. Good opportunity to look for volunteers and collaborators.
- coverage:
- All presentations are recorded and viewable.
- Listed all presenters and location of recordings
- [Thomas,Pascal] The plugfest was a great success and has received mentions from various sources including IETF chair.
- [Pascal] gives 1min overview about flow label draft.
- [Thomas] 8 teams of presenters. Acknowledges and thanks everyone.
- LLN plugfest (Ines Robles, Xavi Vilajosana) [10min] Ines presents
- [08.45] WG meetings (Thomas Watteyne, Pascal Thubert)
- Meeting minutes published on bitbucket. Sep 5th is deadline for changes. Requests comments.
- presents Next steps.
- language and terminology to be clarified
- [Pascal] Raises issues about native language of authors and requests native English speaking reviewers.
- CoAPIE presented. Was received well.
- Start thinking about how to merge it into other related drafts.
- [Qin] discused with Carl and juergen about YANG model, got very good feedback about YANG model
- nobody converts between YANG and CBOR. YANG is a 2D table, with CBOR, they suggest that we need some IETF draft.
- [Thomas] lots of activity around constrained version of NETCONF called CORECONF. Idea is data model is described in YANG and it can be accessed using CoAP and maybe CBOR.
- [Thomas] If CORECONF exists, 6TiSCH CoAP draft could be merged with it. Cites other drafts that could also be merged into CORECONF. It will be 1 module for management. Will let the WG know as soon as it is more official.
- [08.58] AOB
- Extension for review of COMAN draft. Requests people to review to make sure problem statement is in line with what we want to do.
- Summer schedule for 6tisch calls. Bi-weekly calls?
- [Diego] Wants to know if there will be a 6TiSCH session at IETF91 Hawaii.
- [Pascal] it is still open. Discuss on mailing list.
- [Thomas] Diego, can you start discussion on ML.
Action item: Diego to start discussion on ML about 6TiSCH session at IETF91.
- [09.02] Meeting ends
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