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Minutes IETF 86 Orlando meeting 12 March 2013, 6TSCH group

Location

Caribbean 2, 11.30-12.45

Agenda

  • Define scope and problem slides slides ROLL
  • Define goals and deliverables
  • Discuss dependencies and liaisons
    • External

Minutes

  • [slide 3] scope presentation

    • rough consensus is asked to audience.
      • rough consensus on scope from audience
      • Action: reach rough consensus on ML
    • Q: where is security covered?
      • Action: add specific security section to architecture draft.

  • [slide 4] problem

    • draft-phinney-roll-industrial-applicability as starting point for problem statement

  • [slide 5] Goals and Deliverables

    • Informational:
      • draft lln context: at version -01, Deals with the challenges of TSCH and missing pieces
      • draft architecutre
      • draft terminology: provides different definitions of terms colliding with IEEE802.15.4e
      • draft coexistence: needed
    • New drafts (standards track):
      • 6tus: define the adaptation layer on top TSCH
      • Management protocols: how from the central manager program the schedule. Extend PCE, to be defined. Extend netconf.
      • Track reservation/distributed routing, RSVP-like protocol.
    • Adapt existing work:
      • 6tsch RPL Objective Function? do we need to do something with it?
      • Use fragment forwarding? fragmentation along a track. Using MPLS-like ideas to push fragments along a track.
    • Extern

  • [slide 6] Dependencies and liaisons:

    • IEEE802.1TSN.
    • ISA100.20
    • IoT6

  • Norman Finn presents IEEE802.1TSN slides:

    • 802.1Q does bridging mainly.
    • time sensitive networks (audio,video,bridging task group), then renamed to time sensitive networks.
    • basic principles.
      • mac addresses are id addresses, not location addresses --> things can move easily.
      • filtering database, filters ports according to some information in order to find what port to send the data on.
      • RSTP: a single spanning tree shared by all traffic
      • MSTP: multiple instances of RSTP - VLANS share different spanning trees.
      • SPB: IS-IS bridging, shortest path bridging. Each node has its own SP>T. We are not limited to shared spanning trees anymore.
    • Software defined networking
      • Traffic engineering. A control node, like MPLS or GMPLS that enables to setup topology decisions.
    • SPB: IS-IS to do it. distribute the link state database using the standards Use some tlv that have been added. Same metrics, all intact but only spanning tree computation.
    • 2- modes:
      • 1-encapsulate users frame in another frame (like tunneling), total and complete encapsulation.
      • 2-vlan tag to encode. plug an play version of IS-IS,
    • Wired/Wireless bridging:
      • how to put wifi in the middle of the network.
    • AP becomes a bridge.
      • 64bit mac vs 48bit addresses: how do we cope with that? 64 bits can be trimmed down.
      • SPBV: plug and play,bridges assign to each other an ID.
      • PAth Control Reservation: this is relevant to 6TSCH.
    • Explicit path control. bandwidth and stream reservation.
    • path can be setup by a controller.
    • QoS on 802.1Q.
      • 3bits of priority on a vlan tag. Provider vlan tag has one more bit for delivery priority.
      • enhaced transmission selection (round robin, you can configure)
      • credit based shaper, a queue can be configured according to a credit.
    • time scheduled gates that can be applied to queues to ensre priorities.
    • Stream reservation.
    • adv stream in the whole network.
    • Traffic shapping:
      • reliable traffic delivery and latency.
      • Preemption and time scheduled queueing
    • worst case delay has to be reduced. with preemption you can deal with that. (queue preemption).
    • Link Aggregation:
      • aggregates links in vlan.
      • comment: IEEE802.1Q aims to provide the means so a l4 QoS reservation can also fit to a Queue policy in L2 so they agree on what packet goes first according to a priority.

  • Pascal Thubert present slides on ISA100 CNM WG

    • Goal: Common Network Manager and coexistance.
    • Looking at netconf, xml for configuration.
    • provide network management functionalities.
    • coexistence of within a RF medium
    • " " RF media usage.
    • we don't know yet the granularity where this work will apply. Either at slot or at channel scope.

  • Pascal Thubert present slides on IoT6 group

    • large EU project. Lux, Spain,
    • proof that you can do the end to end architecture.
    • using the tsch mac is possible.
    • provide Ipv6 Connectivity.

  • Internal liaisons:

    • PCE - is provision the time-slots
    • COMAN
    • NSIS

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