6TiSCH Minimal Scheduling Function (MSF)
draft-ietf-6tisch-msf-03

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Last updated 2019-04-08
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6TiSCH                                                     T. Chang, Ed.
Internet-Draft                                                M. Vucinic
Intended status: Standards Track                                   Inria
Expires: October 10, 2019                                  X. Vilajosana
                                         Universitat Oberta de Catalunya
                                                            S. Duquennoy
                                                               RISE SICS
                                                         D. Dujovne, Ed.
                                              Universidad Diego Portales
                                                           April 8, 2019

                6TiSCH Minimal Scheduling Function (MSF)
                        draft-ietf-6tisch-msf-03

Abstract

   This specification defines the 6TiSCH Minimal Scheduling Function
   (MSF).  This Scheduling Function describes both the behavior of a
   node when joining the network, and how the communication schedule is
   managed in a distributed fashion.  MSF builds upon the 6TiSCH
   Operation Sublayer Protocol (6P) and the Minimal Security Framework
   for 6TiSCH.

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
   [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
   Task Force (IETF).  Note that other groups may also distribute
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   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on October 10, 2019.

Chang, et al.           Expires October 10, 2019                [Page 1]
Internet-Draft  6TiSCH Minimal Scheduling Function (MSF)      April 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
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Interface to the Minimal 6TiSCH Configuration . . . . . . . .   4
   3.  Autonomous Cells  . . . . . . . . . . . . . . . . . . . . . .   4
   4.  Node Behavior at Boot . . . . . . . . . . . . . . . . . . . .   6
     4.1.  Start State . . . . . . . . . . . . . . . . . . . . . . .   6
     4.2.  Step 1 - Choosing Frequency . . . . . . . . . . . . . . .   6
     4.3.  Step 2 - Receiving EBs  . . . . . . . . . . . . . . . . .   6
     4.4.  Step 3 - Setting up Autonomous Cells for the Join Process   7
     4.5.  Step 4 - Acquiring a RPL rank . . . . . . . . . . . . . .   7
     4.6.  Step 5 - Setting up Autonomous Cells for 6P . . . . . . .   7
     4.7.  Step 6 - Send EBs and DIOs  . . . . . . . . . . . . . . .   8
     4.8.  End State . . . . . . . . . . . . . . . . . . . . . . . .   8
   5.  Rules for Adding/Deleting Cells . . . . . . . . . . . . . . .   8
     5.1.  Adapting to Traffic . . . . . . . . . . . . . . . . . . .   8
     5.2.  Switching Parent  . . . . . . . . . . . . . . . . . . . .  10
     5.3.  Handling Schedule Collisions  . . . . . . . . . . . . . .  10
   6.  6P SIGNAL command . . . . . . . . . . . . . . . . . . . . . .  11
   7.  Scheduling Function Identifier  . . . . . . . . . . . . . . .  11
   8.  Rules for CellList  . . . . . . . . . . . . . . . . . . . . .  12
   9.  6P Timeout Value  . . . . . . . . . . . . . . . . . . . . . .  12
   10. Rule for Ordering Cells . . . . . . . . . . . . . . . . . . .  12
   11. Meaning of the Metadata Field . . . . . . . . . . . . . . . .  12
   12. 6P Error Handling . . . . . . . . . . . . . . . . . . . . . .  13
   13. Schedule Inconsistency Handling . . . . . . . . . . . . . . .  13
   14. MSF Constants . . . . . . . . . . . . . . . . . . . . . . . .  14
   15. MSF Statistics  . . . . . . . . . . . . . . . . . . . . . . .  14
   16. Security Considerations . . . . . . . . . . . . . . . . . . .  14
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