6TiSCH Minimal Scheduling Function (MSF)
draft-chang-6tisch-msf-02

Document Type Active Internet-Draft (6tisch WG)
Last updated 2018-07-02
Stream IETF
Intended RFC status Proposed Standard
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6TiSCH                                                     T. Chang, Ed.
Internet-Draft                                                     Inria
Intended status: Standards Track                              M. Vucinic
Expires: January 3, 2019                        University of Montenegro
                                                           X. Vilajosana
                                         Universitat Oberta de Catalunya
                                                            S. Duquennoy
                                                               RISE SICS
                                                         D. Dujovne, Ed.
                                              Universidad Diego Portales
                                                            July 2, 2018

                6TiSCH Minimal Scheduling Function (MSF)
                       draft-chang-6tisch-msf-02

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
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   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on January 3, 2019.

Chang, et al.            Expires January 3, 2019                [Page 1]
Internet-Draft  6TiSCH Minimal Scheduling Function (MSF)       July 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.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Interface to the Minimal 6TiSCH Configuration . . . . . . . .   4
   3.  Autonomous Unicast Cells  . . . . . . . . . . . . . . . . . .   5
   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 Unicast Cells  . . . . . .   7
     4.5.  Step 4 - Join Request/Response  . . . . . . . . . . . . .   7
     4.6.  Step 5 - Acquiring a RPL rank . . . . . . . . . . . . . .   7
     4.7.  Step 6 - Send EBs and DIOs  . . . . . . . . . . . . . . .   7
     4.8.  Step 7 - Neighbor Polling . . . . . . . . . . . . . . . .   7
     4.9.  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 . . . . . . . . . . . . . . . . . . . . . .  12
   7.  Scheduling Function Identifier  . . . . . . . . . . . . . . .  12
   8.  Rules for CellList  . . . . . . . . . . . . . . . . . . . . .  12
   9.  6P Timeout Value  . . . . . . . . . . . . . . . . . . . . . .  12
   10. Rule for Ordering Cells . . . . . . . . . . . . . . . . . . .  12
   11. Meaning of the Metadata Field . . . . . . . . . . . . . . . .  13
   12. 6P Error Handling . . . . . . . . . . . . . . . . . . . . . .  13
   13. Schedule Inconsistency Handling . . . . . . . . . . . . . . .  13
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