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Minutes, 25 September 2015 interim, 6TiSCH WG
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)
- Xavi Vilajosana
- Thomas Watteyne
- Pascal Thubert
Action Items
ACTION: letter to IEEE to get the space in the IE IDs.
Present (alphabetically)
- Thomas Watteyne
- Pascal Thubert
- Diego Dujovne
- Giuseppe Piro
- Lijo Thomas
- Maria Rita Palattella
- Nestor >
- Nicola Accettura
- Patrick Wetterwald
- Qin Wang
- S.V.R. Anand
- Savio Scianlepore
- Senju Thomas Panicker
- Shalu ?
- Tengfei Chang
- Tom Phinney
- Xavi Vilajosana
- 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.
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Minutes from Last meeting Last meeting minutes are approved. No issues raised.
-
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
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[07.??] Scoping dynamic scheduling work
-
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.
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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.
-
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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.
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TW: we can go to no centralized but we can keep chunks for the future to address the PCE case.
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ACTION: letter to IEEE to get the space in the IE IDs.
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[07.54] New charter bashing
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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)
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Non-milestone work items:
- keep text in the charter or drop it?
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[08.05] AOB No other B.
- [08.08] Meeting ends
Updated