Minutes interim-2016-6tisch-15: Fri 07:00

Meeting Minutes IPv6 over the TSCH mode of IEEE 802.15.4e (6tisch) WG
Title Minutes interim-2016-6tisch-15: Fri 07:00
State Active
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Last updated 2016-10-28

Meeting Minutes

   ## DRAFT ##

# Minutes, 28 October 2016 interim, 6TiSCH WG #

Note: timestamps in PDT.

Connection details

-        Date: 7-8am Pacific:
-        Webex link:
-        Wiki: https://bitbucket.org/6tisch/meetings/wiki/161028_webex -       
-        recording:
      - password Hca8cphs

Taking notes _(using Etherpad)_

1. Xavier Vilajosana
1. Pascal Thubert

Present _(alphabetically)_

1. Alga
1. Diego Dujovne
1. Georgios Z. Papadopoulos
1. Goran Selander
1. Ismail Hakki Turan
1. Jenny Manch
1. Jonathan Munoz
1. Kelly Ford
1. Malisa Vucinic
1. Pascal Thubert
1. Qin Wang
1. Maria Rita Palatella
1. Michael Richardson
1. S.V.R. Anand
1. Tengfei Chang
1. Thomas Watteyne
1. Xavi Vilajosana

Last_time _(alphabetically)_

1. Dominique Barthel
1. Georgios Z. Papadopoulos
1. Geraldine Texier
1. Malisa Vucinic
1. Michael Richardson
1. Nichole McNiele
1. Pascal Thubert
1. Pat Kinney
1. Qin Wang
1. S.V.R. Anand
1. Sumankumar Panchal
1. Tengfei Chang
1. Thomas Watteyne
1. Xavi Vilajosana

Action Items

1. poipoi


* Administrivia [2min]
    * Approval agenda
    * Approval minutes last call
* draft-ietf-6tisch-6top-protocol-03 [authors] [10min]
* draft-ietf-6tisch-6top-sf0-02 [authors] [10min]
* draft-vucinic-6tisch-minimal-security-00 [authors] [10min]
* draft-richardson-6tisch-dtsecurity-secure-join-01 [authors] [10min]
* getting organized for IETF97 [chairs] [10min]
* AOB [2min]


* Usual BCP 38 intro by Thomas
* _[07.05]_ Administrivia [2min]
    * Approval agenda
    * Approval minutes last call

    * Appro
* _[07.??]_ news from ROLL and 6lo
    * two draft about how to compress RPL artifacts in packet
    * lots of activities, going through the last step (IANA)
    * will be published soon
    * at the IETF, the backbone draft is split in 6775 update and new text
    * insist that we are lacking support on draft-sarikaya-6lo-ap-nd-04. please
    think about it, introduces important security features to 6LoWPAN ND

* _[07.??]_ draft-ietf-6tisch-6top-protocol-03 [authors] [10min]
    * Thomas shows the 2 major changes on 6top protocol on screen:
        * type field added. Differentiates response vs. confirmation; there was
        a chance for a same seq nmuber to have a confusion * cell option field
        added to a number of 6P commands; a node A can ask node B to add a cell
        indicating the type , Tx, Rx or shared * also a few minor things.
        Questions? none. * Pascal: Scheduled for last call at IETF? * Thomas:
        Could be but we'd rather keep it and submit with SF0 in case a
        dependency shows up
* _[07.??]_ draft-ietf-6tisch-6top-sf0-02 [authors] [10min]
    * Diego: working on tickets, active discussion. Please use ML or issue
    tracker to address issues
        * Removed acronyms, simplified the flows
        * rework on the introduction
        * adapted the policy figure, ask for feedback
    * Thomas: do we want more cells than required for buffer
    * Diego: we used to but that created 2 thresholds
    * Thomas: Why 2?
    * Diego on timeout calculation
        * there was a contradiction on MUST vs. MAY on the calculation.
    * Thomas: SF has full visibility and might be aggressive or not on time
    outs, e.g. short if high throughput is required * Diego: start and stop *
    Thomas: are you arguing to put the timeout in the 6top protocol draft? *
    Diego: yes, alt is to have a very long wait time in case of loss. If we are
    too conservative we'll miss transactions. * Pascal: suggestion to get a
    confirmation from the MAC when hte message is acknowledged, on max attempts
    is reached. * Thomas: so we start the timer only if succesful xmit/ack *
    Pascal: exactly. Doable? * Thomas: Yes; note that the time to transmit may
    be different in both directions, e.g. if different number of cells. *
    Pascal: running out of time * Diego: going rapidly through other. No more
    use of bandwidth, all in cells now * Tengfei: Issue on timer; Pascal's
    proposal does not solve fully the problem. * Thomas: true, let's use the
    mailing list

* Pascal introduces Malisa's work. Chairs want 2 drafts, one very simple and
the more complex DT work.

* _[07.??]_ draft-vucinic-6tisch-minimal-security-00 [authors] [10min]
      * Malisa: this is the very simple version. Same basic model with JN, JA
      and JCE.
         * expect PSK, short address optional
         * minimize number of exchanges. 1 round trip with PSK
         * very low foot print. no protocol used only for joining
         * confidentiality using end to end CCM
         * ND: only link local
         * handshake not needed for PSK
         * then the 1 round trip join using key exchanged in the handshake
         * JN coap client, JCE coap server, JA coap proxy => could not use
         dtls * using OSCOAP+COSE

 * _[07.??]_ draft-richardson-6tisch-dtsecurity-secure-join-01 [authors] [10min]
     * Michael: rarity of broadcast lead to the RA in IE in EB
     * Discussion: do we want a general mechanims or only RA options we care
     about? * proposal is the latter, one IE per option, so we do not need 6lo
     * next meeting Nov 8th, more exchange with Malisa to find common things
     that can be more consistent

* _[07.??]_ getting organized for IETF97 [chairs] [10min]
    * only one remote presentation by Diego Dujovne

* _[07.??]_ AOB [2min]
    * Cancelling meeting next week. See you at IETF97!