6TiSCH Minimal Scheduling Function (MSF)
draft-chang-6tisch-msf-00

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6TiSCH                                                     T. Chang, Ed.
Internet-Draft                                                     Inria
Intended status: Standards Track                              M. Vucinic
Expires: May 3, 2018                            University of Montenegro
                                                           X. Vilajosana
                                         Universitat Oberta de Catalunya
                                                        October 30, 2017

                6TiSCH Minimal Scheduling Function (MSF)
                       draft-chang-6tisch-msf-00

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 6top 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
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   This Internet-Draft will expire on May 3, 2018.

Chang, et al.              Expires May 3, 2018                  [Page 1]
Internet-Draft  6TiSCH Minimal Scheduling Function (MSF)    October 2017

Copyright Notice

   Copyright (c) 2017 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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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Interface to the Minimal 6TiSCH Configuration . . . . . . . .   4
   3.  Node Behavior at Boot . . . . . . . . . . . . . . . . . . . .   5
     3.1.  Start State . . . . . . . . . . . . . . . . . . . . . . .   5
     3.2.  Step 1 - Choosing Frequency . . . . . . . . . . . . . . .   5
     3.3.  Step 2 - Receiving EBs  . . . . . . . . . . . . . . . . .   5
     3.4.  Step 3 - Join Request/Response  . . . . . . . . . . . . .   6
     3.5.  Step 4 - Acquiring a RPL rank . . . . . . . . . . . . . .   6
     3.6.  Step 5 - 6P ADD to Preferred Parent . . . . . . . . . . .   6
     3.7.  Step 6 - Send EBs and DIOs  . . . . . . . . . . . . . . .   7
     3.8.  Step 7 - Neighbor Polling . . . . . . . . . . . . . . . .   7
     3.9.  End State . . . . . . . . . . . . . . . . . . . . . . . .   7
   4.  Rules for Adding/Deleting Cells . . . . . . . . . . . . . . .   7
     4.1.  Adapting to Traffic . . . . . . . . . . . . . . . . . . .   8
     4.2.  Switching Parent  . . . . . . . . . . . . . . . . . . . .   9
     4.3.  Handling Schedule Collisions  . . . . . . . . . . . . . .   9
   5.  6P SIGNAL command . . . . . . . . . . . . . . . . . . . . . .  11
   6.  Scheduling Function Identifier  . . . . . . . . . . . . . . .  11
   7.  Rules for CellList  . . . . . . . . . . . . . . . . . . . . .  11
   8.  6P Timeout Value  . . . . . . . . . . . . . . . . . . . . . .  11
   9.  Rule for Ordering Cells . . . . . . . . . . . . . . . . . . .  11
   10. Meaning of the Metadata Field . . . . . . . . . . . . . . . .  12
   11. 6P Error Handling . . . . . . . . . . . . . . . . . . . . . .  12
   12. Schedule Inconsistency Handling . . . . . . . . . . . . . . .  12
   13. MSF Constants . . . . . . . . . . . . . . . . . . . . . . . .  13
   14. MSF Statistics  . . . . . . . . . . . . . . . . . . . . . . .  13
   15. Security Considerations . . . . . . . . . . . . . . . . . . .  13
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