IEEE 802.15.4 Information Element encapsulation of 6TiSCH Join and Enrollment Information
draft-ietf-6tisch-enrollment-enhanced-beacon-07

Document Type Active Internet-Draft (6tisch WG)
Last updated 2020-01-16
Replaces draft-richardson-6tisch-enrollment-enhanced-beacon
Stream IETF
Intended RFC status Proposed Standard
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Stream WG state Submitted to IESG for Publication
Document shepherd Pascal Thubert
Shepherd write-up Show (last changed 2019-09-17)
IESG IESG state In Last Call (ends 2020-01-22)
Consensus Boilerplate Yes
Telechat date
Responsible AD Suresh Krishnan
Send notices to Pascal Thubert <pthubert@cisco.com>
IANA IANA review state IANA - Review Needed
6tisch Working Group                                          D. Dujovne
Internet-Draft                                Universidad Diego Portales
Intended status: Standards Track                           M. Richardson
Expires: 19 July 2020                           Sandelman Software Works
                                                         16 January 2020

   IEEE 802.15.4 Information Element encapsulation of 6TiSCH Join and
                         Enrollment Information
            draft-ietf-6tisch-enrollment-enhanced-beacon-07

Abstract

   In TSCH mode of IEEE STD 802.15.4, opportunities for broadcasts are
   limited to specific times and specific channels.  Nodes in a TSCH
   network typically frequently send Enhanced Beacon (EB) frames to
   announce the presence of the network.  This document provides a
   mechanism by which small details critical for new nodes (pledges) and
   long sleeping nodes may be carried within the Enhanced Beacon.

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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   This Internet-Draft will expire on 19 July 2020.

Copyright Notice

   Copyright (c) 2020 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

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   as described in Section 4.e of the Trust Legal Provisions and are
   provided without warranty as described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Use of BCP 14 Terminology . . . . . . . . . . . . . . . .   2
     1.2.  Layer-2 Synchronization . . . . . . . . . . . . . . . . .   2
     1.3.  Layer-3 synchronization: IPv6 Router Solicitations and
           Advertisements  . . . . . . . . . . . . . . . . . . . . .   3
   2.  Protocol Definition . . . . . . . . . . . . . . . . . . . . .   3
   3.  Security Considerations . . . . . . . . . . . . . . . . . . .   5
   4.  Privacy Considerations  . . . . . . . . . . . . . . . . . . .   6
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   6
   6.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   6
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   6
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .   6
     7.2.  Informative References  . . . . . . . . . . . . . . . . .   7
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   8

1.  Introduction

   [RFC7554] describes the use of the time-slotted channel hopping
   (TSCH) mode of [ieee802154].  As further detailed in [RFC8180], an
   Enhanced Beacon (EB) is transmitted during a slot designated a
   broadcast slot.

1.1.  Use of BCP 14 Terminology

   ::boilerplate bcp14

   Other terminology can be found in [I-D.ietf-6tisch-architecture] in
   section 2.1.

1.2.  Layer-2 Synchronization

   As explained in section 6 of [RFC8180], the Enhanced Beacon (EB) has
   a number of purposes: synchronization of ASN and Join Metric,
   carrying timeslot template identifier, carrying the channel hopping
   sequence identifier, and indicating the TSCH SlotFrame.

   The EB is used by nodes already part of a TSCH network to annouce its
   existence.  Receiving an EB allows a Joining Node (pledge) to learn
   about the network and synchronize to it.  The EB may also be used as
   a means for a node already part of the network to re-synchronize
   [RFC7554].

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   There is a limited number of timeslots designated as a broadcast slot
   by each router in the network.  Considering 10ms slots and a slot-
   frame length of 100, these slots are rare and could result in only 1
   slot/s for a broadcast, which needs to be used for the beacon.
   Additional broadcasts for Router Advertisements, or Neighbor
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