An Architecture for IPv6 over the TSCH mode of IEEE 802.15.4
draft-ietf-6tisch-architecture-16

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6TiSCH                                                   P. Thubert, Ed.
Internet-Draft                                                     Cisco
Intended status: Standards Track                        November 8, 2018
Expires: May 12, 2019

      An Architecture for IPv6 over the TSCH mode of IEEE 802.15.4
                   draft-ietf-6tisch-architecture-16

Abstract

   This document describes a network architecture that provides low-
   latency, low-jitter and high-reliability packet delivery.  It
   combines a high speed powered backbone and subnetworks using IEEE
   802.15.4 time-slotted channel hopping (TSCH) to meet the requirements
   of LowPower wireless deterministic applications.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on May 12, 2019.

Copyright Notice

   Copyright (c) 2018 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
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Thubert                   Expires May 12, 2019                  [Page 1]
Internet-Draft             6tisch-architecture             November 2018

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   4
     2.1.  BCP 14  . . . . . . . . . . . . . . . . . . . . . . . . .   4
     2.2.  References  . . . . . . . . . . . . . . . . . . . . . . .   4
     2.3.  Subset of a 6LoWPAN Glossary  . . . . . . . . . . . . . .   5
   3.  High Level Architecture . . . . . . . . . . . . . . . . . . .   6
     3.1.  6TiSCH Stack  . . . . . . . . . . . . . . . . . . . . . .   6
     3.2.  TSCH: A Deterministic MAC Layer . . . . . . . . . . . . .   8
     3.3.  Scheduling TSCH . . . . . . . . . . . . . . . . . . . . .   9
     3.4.  Routing and Forwarding Over TSCH  . . . . . . . . . . . .  10
     3.5.  A Non-Broadcast Multi-Access Radio Mesh Network . . . . .  12
     3.6.  A Multi-Link Subnet Model . . . . . . . . . . . . . . . .  13
     3.7.  Join Process and Registration . . . . . . . . . . . . . .  15
   4.  Architecture Components . . . . . . . . . . . . . . . . . . .  17
     4.1.  6LoWPAN (and RPL) . . . . . . . . . . . . . . . . . . . .  17
       4.1.1.  RPL Leaf Support in 6LoWPAN ND  . . . . . . . . . . .  17
       4.1.2.  RPL Root And 6LBR . . . . . . . . . . . . . . . . . .  18
     4.2.  TSCH and 6top . . . . . . . . . . . . . . . . . . . . . .  19
       4.2.1.  6top  . . . . . . . . . . . . . . . . . . . . . . . .  19
       4.2.2.  Scheduling Functions and the 6P protocol  . . . . . .  19
       4.2.3.  6top and RPL Objective Function operations  . . . . .  20
       4.2.4.  Network Synchronization . . . . . . . . . . . . . . .  21
       4.2.5.  SlotFrames and Priorities . . . . . . . . . . . . . .  22
       4.2.6.  Distributing the reservation of cells . . . . . . . .  23
     4.3.  Communication Paradigms and Interaction Models  . . . . .  25
     4.4.  Schedule Management Mechanisms  . . . . . . . . . . . . .  26
       4.4.1.  Static Scheduling . . . . . . . . . . . . . . . . . .  26
       4.4.2.  Neighbor-to-neighbor Scheduling . . . . . . . . . . .  27
       4.4.3.  Remote Monitoring and Schedule Management . . . . . .  27
       4.4.4.  Hop-by-hop Scheduling . . . . . . . . . . . . . . . .  30
     4.5.  On Tracks . . . . . . . . . . . . . . . . . . . . . . . .  30
       4.5.1.  General Behavior of Tracks  . . . . . . . . . . . . .  30
       4.5.2.  Serial Track  . . . . . . . . . . . . . . . . . . . .  31
       4.5.3.  Complex Track with Replication and Elimination  . . .  32
       4.5.4.  DetNet End-to-end Path  . . . . . . . . . . . . . . .  32
       4.5.5.  Cell Reuse  . . . . . . . . . . . . . . . . . . . . .  33
     4.6.  Forwarding Models . . . . . . . . . . . . . . . . . . . .  34
       4.6.1.  Track Forwarding  . . . . . . . . . . . . . . . . . .  34