An Architecture for IPv6 over the TSCH mode of IEEE 802.15.4
draft-ietf-6tisch-architecture-20

Document Type Active Internet-Draft (6tisch WG)
Last updated 2019-06-12 (latest revision 2019-03-01)
Replaces draft-thubert-6tisch-architecture
Stream IETF
Intended RFC status Proposed Standard
Formats plain text xml pdf html bibtex
Reviews
Stream WG state Submitted to IESG for Publication
Other - see Comment Log
Document shepherd Shwetha Bhandari
Shepherd write-up Show (last changed 2019-01-15)
IESG IESG state In Last Call (ends 2019-06-26)
Consensus Boilerplate Yes
Telechat date
Responsible AD Suresh Krishnan
Send notices to (None)
IANA IANA review state IANA - Review Needed
IANA action state None
6TiSCH                                                   P. Thubert, Ed.
Internet-Draft                                             Cisco Systems
Intended status: Standards Track                           March 1, 2019
Expires: September 2, 2019

      An Architecture for IPv6 over the TSCH mode of IEEE 802.15.4
                   draft-ietf-6tisch-architecture-20

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 September 2, 2019.

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 September 2, 2019               [Page 1]
Internet-Draft             6tisch-architecture                March 2019

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Terms and References  . . . . . . . . . . . . . . . . . . . .   4
     2.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   4
     2.2.  Abbreviations . . . . . . . . . . . . . . . . . . . . . .  10
     2.3.  References  . . . . . . . . . . . . . . . . . . . . . . .  11
   3.  High Level Architecture . . . . . . . . . . . . . . . . . . .  12
     3.1.  A Non-Broadcast Multi-Access Radio Mesh Network . . . . .  12
     3.2.  A Multi-Link Subnet Model . . . . . . . . . . . . . . . .  13
     3.3.  TSCH: A Deterministic MAC Layer . . . . . . . . . . . . .  15
     3.4.  Scheduling TSCH . . . . . . . . . . . . . . . . . . . . .  15
     3.5.  Distributed vs. Centralized Routing . . . . . . . . . . .  17
     3.6.  Forwarding Over TSCH  . . . . . . . . . . . . . . . . . .  18
     3.7.  6TiSCH Stack  . . . . . . . . . . . . . . . . . . . . . .  19
   4.  Architecture Components . . . . . . . . . . . . . . . . . . .  21
     4.1.  6LoWPAN (and RPL) . . . . . . . . . . . . . . . . . . . .  21
       4.1.1.  RPL-Unaware Leaves and 6LoWPAN ND . . . . . . . . . .  21
       4.1.2.  RPL Root And 6LBR . . . . . . . . . . . . . . . . . .  21
     4.2.  Network Access and Addressing . . . . . . . . . . . . . .  22
       4.2.1.  Join Process  . . . . . . . . . . . . . . . . . . . .  22
       4.2.2.  Registration  . . . . . . . . . . . . . . . . . . . .  24
     4.3.  TSCH and 6top . . . . . . . . . . . . . . . . . . . . . .  26
       4.3.1.  6top  . . . . . . . . . . . . . . . . . . . . . . . .  26
       4.3.2.  Scheduling Functions and the 6top protocol  . . . . .  27
       4.3.3.  6top and RPL Objective Function operations  . . . . .  29
       4.3.4.  Network Synchronization . . . . . . . . . . . . . . .  29
       4.3.5.  SlotFrames and CDU matrix . . . . . . . . . . . . . .  31
       4.3.6.  Distributing the reservation of cells . . . . . . . .  32
     4.4.  Communication Paradigms and Interaction Models  . . . . .  33
     4.5.  Schedule Management Mechanisms  . . . . . . . . . . . . .  34
       4.5.1.  Static Scheduling . . . . . . . . . . . . . . . . . .  34
       4.5.2.  Neighbor-to-neighbor Scheduling . . . . . . . . . . .  34
       4.5.3.  Remote Monitoring and Schedule Management . . . . . .  35
       4.5.4.  Hop-by-hop Scheduling . . . . . . . . . . . . . . . .  37
     4.6.  On Tracks . . . . . . . . . . . . . . . . . . . . . . . .  37
       4.6.1.  General Behavior of Tracks  . . . . . . . . . . . . .  38
       4.6.2.  Serial Track  . . . . . . . . . . . . . . . . . . . .  38
       4.6.3.  Complex Track with Replication and Elimination  . . .  39
Show full document text