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Minutes Webex 22 February 2013, 6TSCH group
Note: timestamps in PST.
Present (alphabetically)
- Alfredo Grieco
- Dominique Barthel
- Kris Pister
- Maria Rita Palatella
- Michael Richarson
- Normann Finn
- Pascal Thubert
- Qin Wang
- Raghuram Sudhaakar
- Robert Assimiti
- Shitanshu Shah
- Tina Tsou
- Thomas Watteyne
- Tom Phinney
- Xavi Vilajosana
Agenda
- Status on Orlando meetings [5min]
- Update on http://tools.ietf.org/html/draft-watteyne-6tsch-tsch-lln-context-01
- presentation changes
- discussion on the draft
- time sync. [20min]
- Summary of last week discussion. Talk on the multiroot case (over a shared backbone). Also, start discussing a model if the backbone is 802.1 TSN deterministic ethernet.
- Drafts to come.
- Archi [Pascal] [10min]
- TOC
- authors
- 6tus [Qin, Xavi] [10min]
- TOC
- authors
- Archi [Pascal] [10min]
Minutes: * [09.07] meeting starts * Orlando meeting update [Pascal] * bar BoF evolves into official meeting. We are going to have a working meeting. We are already starting the work. Meeting will look like a normal meeting. We can organize it as a conference. Open discussion, but progress on items. * Same meeting time on Tuesday and Wednesday, over lunch. Pascal tries to arrange for pizzas. * Tuesday: prepare for BoF * Wednesday: present drafts, open technical discussion. * Update LLN draft [Thomas] * presentation of changes * request to send comments * Synchronization * If there are multiple DAG roots in the network, should they be synchronized? * consenus on the call. Motion adopted. * [09.24] 802.1 and TSN [Normann] * [Pascal] Goal: * IP abstraction the same across wireless and wired network * consistent with Ethernet semantics * [Normann] * slides highlight what WG is doing in the WiFi space. Active in 802.1, and WiFi * 802 is "Ethernet". 802.1 is "higher layers", bridging an up. WG was called "audio video task group", now called TSN. * define a profile of IEEE1588. IEEE1588 is a toolbox, which can provide time sync donw to 1us. Work in 802.11 to support time sync; maybe not 1us, but some sync. * Scheduled queuing. based on clock sync, you can set up so that queues on a bridge can be tied to a time-of-day schedule. E.g., schedule a certain class of service with 0 jitter at some part of the day. * 802.1 interworking standard. Idea is not to in spanning trees, but use IS-IS to help build schedule. Lots of interop demos. Every frame takes the least-cost path through the network. Two modes: * MAC-in-MAC * 802.1Qbz to put WiFi in middle of network, not on edge. AP is a bridge, not an intermediate. WiFi stations can be interconnected by a combination of wireless and wires. * one of characteristics of a bridged topology control protocols is that it operates per VLAN. Some VLANs can be under control of RPL. * Clarifying questions. * [Pascal] how can time/schedules pass across boundary between 802.15.4 and TSN world? * [Michael] Could IS-IS express some ETX (or other metric)? * [Thomas] We need to discuss 802.1 more, maybe at Orlando. * [Normann] Maybe will attend Tuesday meetings. * [09.50] Presentation of 6tus adaptation layer [Xavi, Qin] * present slides * [Thomas] will get slot in Wednesday Orlando meeting to discuss this * [10.10] meeting ends
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