An Architecture for IPv6 over the TSCH mode of IEEE 802.15.4
draft-ietf-6tisch-architecture-28

Document Type Active Internet-Draft (6tisch WG)
Last updated 2019-10-31 (latest revision 2019-10-29)
Replaces draft-thubert-6tisch-architecture
Stream IETF
Intended RFC status Informational
Formats plain text html xml pdf htmlized bibtex
Reviews
Stream WG state Submitted to IESG for Publication
Document shepherd Shwetha Bhandari
Shepherd write-up Show (last changed 2019-07-05)
IESG IESG state RFC Ed Queue
Consensus Boilerplate Yes
Telechat date
Responsible AD Suresh Krishnan
Send notices to (None)
IANA IANA review state Version Changed - Review Needed
IANA action state No IANA Actions
RFC Editor RFC Editor state MISSREF
6TiSCH                                                   P. Thubert, Ed.
Internet-Draft                                             Cisco Systems
Intended status: Informational                           29 October 2019
Expires: 1 May 2020

      An Architecture for IPv6 over the TSCH mode of IEEE 802.15.4
                   draft-ietf-6tisch-architecture-28

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.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at https://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on 1 May 2020.

Copyright Notice

   Copyright (c) 2019 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
   Provisions Relating to IETF Documents (https://trustee.ietf.org/
   license-info) in effect on the date of publication of this document.
   Please review these documents carefully, as they describe your rights
   and restrictions with respect to this document.  Code Components
   extracted from this document must include Simplified BSD License text
   as described in Section 4.e of the Trust Legal Provisions and are
   provided without warranty as described in the Simplified BSD License.

Thubert                    Expires 1 May 2020                   [Page 1]
Internet-Draft             6tisch-architecture              October 2019

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   5
     2.1.  New Terms . . . . . . . . . . . . . . . . . . . . . . . .   5
     2.2.  Abbreviations . . . . . . . . . . . . . . . . . . . . . .  10
     2.3.  Related Documents . . . . . . . . . . . . . . . . . . . .  11
   3.  High Level Architecture . . . . . . . . . . . . . . . . . . .  12
     3.1.  A Non-Broadcast Multi-Access Radio Mesh Network . . . . .  12
     3.2.  A Multi-Link Subnet Model . . . . . . . . . . . . . . . .  14
     3.3.  TSCH: A Deterministic MAC Layer . . . . . . . . . . . . .  15
     3.4.  Scheduling TSCH . . . . . . . . . . . . . . . . . . . . .  16
     3.5.  Distributed vs. Centralized Routing . . . . . . . . . . .  17
     3.6.  Forwarding Over TSCH  . . . . . . . . . . . . . . . . . .  18
     3.7.  6TiSCH Stack  . . . . . . . . . . . . . . . . . . . . . .  19
     3.8.  Communication Paradigms and Interaction Models  . . . . .  21
   4.  Architecture Components . . . . . . . . . . . . . . . . . . .  22
     4.1.  6LoWPAN (and RPL) . . . . . . . . . . . . . . . . . . . .  22
       4.1.1.  RPL-Unaware Leaves and 6LoWPAN ND . . . . . . . . . .  22
       4.1.2.  6LBR and RPL Root . . . . . . . . . . . . . . . . . .  23
     4.2.  Network Access and Addressing . . . . . . . . . . . . . .  23
       4.2.1.  Join Process  . . . . . . . . . . . . . . . . . . . .  24
       4.2.2.  Registration  . . . . . . . . . . . . . . . . . . . .  26
     4.3.  TSCH and 6top . . . . . . . . . . . . . . . . . . . . . .  27
       4.3.1.  6top  . . . . . . . . . . . . . . . . . . . . . . . .  27
       4.3.2.  Scheduling Functions and the 6top protocol  . . . . .  29
       4.3.3.  6top and RPL Objective Function operations  . . . . .  30
       4.3.4.  Network Synchronization . . . . . . . . . . . . . . .  31
       4.3.5.  Slotframes and CDU matrix . . . . . . . . . . . . . .  32
       4.3.6.  Distributing the reservation of cells . . . . . . . .  33
     4.4.  Schedule Management Mechanisms  . . . . . . . . . . . . .  34
       4.4.1.  Static Scheduling . . . . . . . . . . . . . . . . . .  34
       4.4.2.  Neighbor-to-neighbor Scheduling . . . . . . . . . . .  35
       4.4.3.  Remote Monitoring and Schedule Management . . . . . .  36
       4.4.4.  Hop-by-hop Scheduling . . . . . . . . . . . . . . . .  38
     4.5.  On Tracks . . . . . . . . . . . . . . . . . . . . . . . .  38
       4.5.1.  General Behavior of Tracks  . . . . . . . . . . . . .  39
       4.5.2.  Serial Track  . . . . . . . . . . . . . . . . . . . .  39
       4.5.3.  Complex Track with Replication and
               Elimination . . . . . . . . . . . . . . . . . . . . .  40
Show full document text