Subject: [6tisch] Minutes, 25 September 2015 interim, 6TiSCH WG

From: "Pascal Thubert (pthubert)" <[email-masked]>
Date: Fri, 25 Sep 2015 18:39:30 +0000

Note: time are PST

Meeting info

  *   Date: September 25, 7AM Pacific, 2PM UTC
  *   Timezones: http://www.worldtimebuddy.com/?qm=1&lid=100,12,5392171&h=100&date=2015-9-25&sln=14-15
  *   Webex link: https://cisco.webex.com/ciscosales/j.php?MTID=md64a0958ae4154c0553f056bf42b756a
  *   Meeting number: 203 137 703
  *   Meeting password: sixtus
  *   Audio connection:
     *   +1-866-432-9903 Call-in toll-free number (US/Canada)
     *   0120.312271 Japan Toll -Free

Taking notes (using Etherpad)

  1.  Xavi Vilajosana
  2.  Thomas Watteyne
  3.  Pascal Thubert

Action Items

ACTION: letter to IEEE to get the space in the IE IDs.

Present (alphabetically)

  1.  Thomas Watteyne
  2.  Pascal Thubert
  3.  Diego Dujovne
  4.  Giuseppe Piro
  5.  Lijo Thomas
  6.  Maria Rita Palattella
  7.  Nestor >
  8.  Nicola Accettura
  9.  Patrick Wetterwald
  10. Qin Wang
  11. S.V.R. Anand
  12. Savio Scianlepore
  13. Senju Thomas Panicker
  14. Shalu ?
  15. Tengfei Chang
  16. Tom Phinney
  17. Xavi Vilajosana
  18. Zhuo Chen

Agenda

  *   Administrivia [5min]
     *   Agenda bashing
     *   Minutes from Last meeting
  *   Status for draft-ietf-6tisch-minimal [15min]
  *   Scoping dynamic scheduling work [25min]
     *   OTF centralized and distributed
     *   CoAP-IE or something else, at IETF vs. IEEE
     *   Slot appropriation (LBT?)
     *   Chunk support
  *   New charter bashing [10min]
  *   AOB [1min]

Resources

  *   Webex meeting: https://cisco.webex.com/ciscosales/j.php?MTID=md64a0958ae4154c0553f056bf42b756a
  *   Webex recording: https://cisco.webex.com/ciscosales/lsr.php?RCID=2d65d26049254bfa8f558fa43afdee0f
  *   Wiki: https://bitbucket.org/6tisch/meetings/wiki/150925_webex
  *   Slides: https://bitbucket.org/6tisch/meetings/src/master/150925_webex/slides_150925_webex.ppt

________________________________
Minutes (all times in Pacific Time)

  *   [07.05] Meeting starts

*        [07.07] Administrivia

     *   Agenda bashing Agenda is approved. No issues raised.

o   Minutes from Last meeting Last meeting minutes are approved. No issues raised.

o   90 minutes meeting at IETF94 Yokohama

     *   2nd October, Preliminary agenda for the whole meeting by october 2nd.
     *   19th October, WG agenda to be published
     *   No 6TiCCH Plugtest in Yokohama.

*        [07.10] Status for draft-ietf-6tisch-minimal

     *   the idea is not to copy the standard, but explain what we want to have in the header. This way, will translate from 15.4e-2012 to 15.4-2015
     *   Pascal calls for consensus on the call

no issues raised

     *   Action item: Pascal to push the button to ship the minimal draft to the IESG

*        [07.??] Scoping dynamic scheduling work

o   Take new work after pushing minimal.

        *   security
        *   finalize 6top interface
        *   Dynamic Scheduling: what do we do?
        *   Be able to have parent-children agree in slots in the schedule.
        *   Interaction between parent and child. How to avoid parents to be greedy, optimize the schedule, etc...
        *   OTF draft is a big piece here. But we need to thing further on what we can take and what can be addressed.

o   TW: it important we get something out. Timeline is narrow. Pretty soon output of the process. Deliver fast. Test during Plugtest in Paris. Things to be done during the next 2 weeks so we can get things in the plugtest in Feb. Paris. Advanced Features: RSVP, OTF.

     *   XV: we need to deliver 6top interface too.
     *   TW: Agree. But now we need to set the BIG goals and then see how we give support to achieve them with what we have.
     *   PT: The charter should say that we are focusing in dynamic scheduling. Do not say what exactly yet.

Discussion POINTS: Zhuo: does OTF do best-effort only or also guaranteed TW: * OTF centralized and distributed * CoAP-IE or something else, at IETF vs. IEEE Do we continue CoAPIE or we go to something else? CoAP IE involves a lot of bytes per packet. It seems now that might be more interesting to find a format more aligned to IEEE so this work might be shared or adopted.

     *   Slot appropriation (LBT?)
     *   how do we get a time slot? what is the policy? randomly? CCA on it? LBT?
     *   is random allocation enough
     *   a node would propose a number of cells to its neighbor. How the node chooses the proposed cells does not matter for the protocol.
     *   PT: we need to see if this has an impact in the network.
        *   XV: maybe we can differentiate policy from mechanism?
        *   PT: will write down
        *   PT: proposal: first, not specify how a node selects the slot
     *   Chunk support We can decide to add it or not.

*        Zhuo: will OTF be usable for other tracks? not best effort only?

  *   TW: start working with best effort and then involve chunk support and differentitated tracks.
  *   Zhuo: Agrees.
  *   MR: When OTF allocates the cell it uses soft cells from 6top. We need to consider also the PCE case.

*        TW: we can go to no centralized but we can keep chunks for the future to address the PCE case.

*        ACTION: letter to IEEE to get the space in the IE IDs.

*        [07.54] New charter bashing

*        Discussion about the new charter items.

     *   OTF in the charter
     *   Augment current drafts to support dynamic scheduling and being applicable to Detnet
     *   Define MAC layer interactions to negotitate for time slots.
     *   Discussion about whether we focus only in IP traffic or other traffic as well (tracks)

*        Non-milestone work items:

     *   keep text in the charter or drop it?

*        [08.05] AOB No other B.

  *   [08.08] Meeting ends