6TiSCH Autonomous Scheduling Function (ASF)
draft-duquennoy-6tisch-asf-01

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6TiSCH                                                 S. Duquennoy, Ed.
Internet-Draft                                                 RISE SICS
Intended status: Standards Track                           X. Vilajosana
Expires: September 2, 2018               Universitat Oberta de Catalunya
                                                             T. Watteyne
                                                                   Inria
                                                           March 1, 2018

              6TiSCH Autonomous Scheduling Function (ASF)
                     draft-duquennoy-6tisch-asf-01

Abstract

   This document defines a Scheduling Function called "ASF": the 6TiSCH
   Autonomous Scheduling Function.  With ASF, nodes maintain their TSCH
   schedule based on local neighborhood knowledge, without any signaling
   after association.  Hashes of the nodes' MAC address are used to
   deterministically derive the [slotOffset,channelOffset] location of
   cells in the TSCH schedule.  Different traffic types (e.g.  TSCH EB,
   RPL DIO, UDP etc.) are assigned to distinct slotframes, for isolation
   and flexible dimensioning.  This approach provides over-provisioned
   schedules with low maintenance, in pursuit for simplicity rather than
   optimality.

Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in RFC
   2119 [RFC2119].

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 September 2, 2018.

Duquennoy, et al.       Expires September 2, 2018               [Page 1]
Internet-Draft 6TiSCH Autonomous Scheduling Function (ASF)    March 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
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   described in the Simplified BSD License.

Table of Contents

   1.  TEMPORARY EDITORIAL NOTES . . . . . . . . . . . . . . . . . .   3
   2.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     2.1.  Application Domains . . . . . . . . . . . . . . . . . . .   3
   3.  General Operation . . . . . . . . . . . . . . . . . . . . . .   4
     3.1.  Cell Coordinates  . . . . . . . . . . . . . . . . . . . .   4
     3.2.  Types of Slotframes . . . . . . . . . . . . . . . . . . .   4
       3.2.1.  Rendez-vous slotframe . . . . . . . . . . . . . . . .   4
       3.2.2.  Receiver-based slotframe  . . . . . . . . . . . . . .   4
       3.2.3.  Sender-based slotframe  . . . . . . . . . . . . . . .   5
     3.3.  Conditional Cells . . . . . . . . . . . . . . . . . . . .   5
     3.4.  Interaction between Slotframes  . . . . . . . . . . . . .   5
   4.  Configuration . . . . . . . . . . . . . . . . . . . . . . . .   6
   5.  Scheduling Function Identifier  . . . . . . . . . . . . . . .   9
   6.  Rules for Adding/Deleting Cells . . . . . . . . . . . . . . .   9
   7.  Rules for CellList  . . . . . . . . . . . . . . . . . . . . .   9
   8.  6P Timeout Value  . . . . . . . . . . . . . . . . . . . . . .  10
   9.  Rule for Ordering Cells . . . . . . . . . . . . . . . . . . .  10
   10. Meaning of the Metadata Field . . . . . . . . . . . . . . . .  10
   11. Node Behavior at Boot . . . . . . . . . . . . . . . . . . . .  10
   12. 6P Error Handling . . . . . . . . . . . . . . . . . . . . . .  10
   13. Examples  . . . . . . . . . . . . . . . . . . . . . . . . . .  11
   14. [TEMPORARY] Implementation Status . . . . . . . . . . . . . .  11
   15. Security Considerations . . . . . . . . . . . . . . . . . . .  11
   16. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  12
     16.1.  6P Scheduling Function Identifiers 'ASF' . . . . . . . .  12
   17. References  . . . . . . . . . . . . . . . . . . . . . . . . .  12