RPL DAG Metric Container (MC) Node State and Attribute (NSA) object type extension
draft-koutsiamanis-roll-nsa-extension-00

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ROLL                                                R. Koutsiamanis, Ed.
Internet-Draft                                           G. Papadopoulos
Intended status: Standards Track                            N. Montavont
Expires: July 21, 2018                                    IMT Atlantique
                                                              P. Thubert
                                                                   Cisco
                                                        January 17, 2018

RPL DAG Metric Container (MC) Node State and Attribute (NSA) object type
                               extension
                draft-koutsiamanis-roll-nsa-extension-00

Abstract

   Implementing 6TiSCH Packet Replication and Elimination from / to the
   RPL root requires the ability to forward copies of packets over
   different paths via different RPL parents.  Selecting the appropriate
   parents to achieve ultra-low latency and jitter requires information
   about a node's parents.  This document details what information needs
   to be transmitted and how it is encoded within a packet to enable
   this functionality.

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
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   Drafts is at https://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
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   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 July 21, 2018.

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
   Provisions Relating to IETF Documents
   (https://trustee.ietf.org/license-info) in effect on the date of

Koutsiamanis, et al.      Expires July 21, 2018                 [Page 1]
Internet-Draft      RPL MC NSA object type extension        January 2018

   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Tracks  . . . . . . . . . . . . . . . . . . . . . . . . . . .   3
     3.1.  Tracks Overview . . . . . . . . . . . . . . . . . . . . .   3
     3.2.  Complex Tracks  . . . . . . . . . . . . . . . . . . . . .   4
   4.  Packet Replication and Elimination principles . . . . . . . .   4
   5.  Alternative Parent Selection Issue  . . . . . . . . . . . . .   5
   6.  Node State and Attribute (NSA) object type extension  . . . .   5
     6.1.  Compression . . . . . . . . . . . . . . . . . . . . . . .   7
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .   7
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   7
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   8
     9.1.  Informative references  . . . . . . . . . . . . . . . . .   8
     9.2.  Other Informative References  . . . . . . . . . . . . . .   8
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   9

1.  Introduction

   Industrial network applications have stringent requirements on
   reliability and predictability, and typically leverage 1+1
   redundancy, aka Packet Replication and Elimination (PRE)
   [I-D.papadopoulos-6tisch-pre-reqs] to achieve their goal.  In order
   for wireless networks to be able to be used in such applications, the
   principles of Deterministic Networking [I-D.ietf-detnet-architecture]
   lead to designs that aim at maximizing packet delivery rate and
   minimizing latency and jitter.  Additionally, given that the network
   nodes often do not have an unlimited power supply, energy consumption
   needs to be minimized as well.

   To meet this goal, IEEE Std. 802.15.4 [IEEE802154-2015] provides
   Time-Slotted Channel Hopping (TSCH), a mode of operation which uses a
   fixed communication schedule to allow deterministic medium access as
   well as channel hopping to work around radio interference.  However,
   since TSCH uses retransmissions in the event of a failed
   transmission, end-to-end delay and jitter performance can
   deteriorate.

   The 6TiSCH working group, focusing on IPv6 over IEEE Std.
   802.15.4-TSCH, has worked on the issues previously highlighted and