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Minutes, 3 November 2017 interim, 6TiSCH WG

Note: timestamps in PDT => This meeting is at 3PM CET!!!!!

Connection details


  1. Diego Dujovne
  2. Georgios Papadopoulos
  3. Jonathan Munoz
  4. Malisa Vucinic
  5. Mark ????? no audio
  6. Michael Richardson
  7. Pascal Thubert
  8. Remy Lui
  9. Robert Barton
  10. Thomas Watteyne
  11. Vanessa Valderrama ????? no audio
  12. Xavi Vilajosana

Taking notes (using Etherpad)

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

Action Items

  • Malisa to start a thread on tagging join process messages


* Note-Well, Blue Sheets, Scribes, Agenda Bashing      [ 5min]
* Status of the work                                   [ 5min]
* IETF 100 prep   (chairs)                             [15min]
* draft-ietf-6tisch-minimal-security (Malisa Vucinic)  [15min]
* draft-chang-6tisch-6top-msf   (Tengfei Chang)        [20min]
* Any Other Business, IEEE status                      [QS]


  • [07:05] Note-Well, Blue Sheets, Scribes, Agenda Bashing
    • Last Meeting Minutes approved
    • Agenda approved.
  • [07:10] Status of the work
  • [07:15] IETF 100 prep (chairs)

    • Going through proposed agenda for IETF 100
    • most of presenters are remote.
    • calling for volunteers, jabber, minute taker, etc. .
    • 6P sent to the IESG
    • if anything is missing please let the chairs know by next Monday
  • [07:30] draft-ietf-6tisch-minimal-security (Malisa Vucinic)

    • Malisa presents
    • New version published october 30th
    • relies completely on PSK. Removed dependency on EDHOC draft. Not adopted yet.
    • summarizes updates.
    • PSK is used.
    • key derivation process
    • changes in OSCORE cause changes in this draft, in particular new key and nonce derivation
    • other changes are detailed. The pledge must now manage its retransmission because the JRC may drop messages silently, which duplicates the confirmable process in CoAP, but the latter cannnot be used
    • join request now a POST even if no need for parms as of today

    • also untrusted neighbors are stored in a separate cache

    • Michael suggests that maybe there oculd be a Track for joins with a low and fixed bandwidth
    • Pascal suggests that the SF could be sensitive to QoS (TOS bits) in cell allocation. Join could have low TOS values and SF could ignore it.
    • Michael suggests that we mandate tagging now even if we are not fully
    • Thomas suggests to start a ML thread on tagging join traffic and see where that goes
  • [07:45] draft-chang-6tisch-6top-msf (Tengfei Chang)

    • Xavi presents on behalf of Tengfei
    • Minimal scheduling function to wrap up the needed steps for distributed allocation of cells in a 6TiSCH network.
    • provides the policy for distributed scheduling to complete the 6TiSCH minimal story
    • provides a rule for using the minimal cell between DIOs, EBs, etc...
    • Xavi presents the lifetime steps
  • [08:00] Adjourn