6TiSCH Experimental Scheduling Function (SFX)
draft-ietf-6tisch-6top-sfx-01

Document Type Active Internet-Draft (6tisch WG)
Last updated 2018-03-05
Replaces draft-ietf-6tisch-6top-sf0
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6TiSCH                                                   D. Dujovne, Ed.
Internet-Draft                                Universidad Diego Portales
Intended status: Experimental                                 LA. Grieco
Expires: September 6, 2018                           Politecnico di Bari
                                                          MR. Palattella
                   Luxembourg Institute of Science and Technology (LIST)
                                                            N. Accettura
                                                               LAAS-CNRS
                                                           March 5, 2018

             6TiSCH Experimental Scheduling Function (SFX)
                     draft-ietf-6tisch-6top-sfx-01

Abstract

   This document defines a Scheduling Function called "Experimental
   Scheduling Function" (SFX).  SFX dynamically adapts the number of
   scheduled cells between neighbor nodes, based on the amount of
   currently allocated cells and the neighbor nodes' cell requirements.
   Neighbor nodes negotiate in a distributed neighbor-to-neighbor basis
   the number of cell(s) to be added/deleted.  SFX uses the 6P signaling
   messages to add/delete cells in the schedule.  This function selects
   the candidate cells from the schedule, defines which cells will be
   added/deleted and triggers the allocation/deallocation process.

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.

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Dujovne, et al.         Expires September 6, 2018               [Page 1]
Internet-Draft               6tisch-6top-sfx                  March 2018

   This Internet-Draft will expire on September 6, 2018.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Scheduling Function Identifier  . . . . . . . . . . . . . . .   3
   3.  Allocated and Used Cells  . . . . . . . . . . . . . . . . . .   3
   4.  Overprovisioning  . . . . . . . . . . . . . . . . . . . . . .   3
   5.  Scheduling Algorithm  . . . . . . . . . . . . . . . . . . . .   4
     5.1.  SFX Triggering Events . . . . . . . . . . . . . . . . . .   4
     5.2.  SFX Cell Estimation Algorithm . . . . . . . . . . . . . .   4
     5.3.  SFX Allocation Policy . . . . . . . . . . . . . . . . . .   5
   6.  Rules for CellList  . . . . . . . . . . . . . . . . . . . . .   7
   7.  6P Timeout Value  . . . . . . . . . . . . . . . . . . . . . .   7
   8.  Meaning of Metadata Information . . . . . . . . . . . . . . .   8
   9.  Node Behavior at Boot . . . . . . . . . . . . . . . . . . . .   8
   10. Cell Type . . . . . . . . . . . . . . . . . . . . . . . . . .   8
   11. SFX Statistics  . . . . . . . . . . . . . . . . . . . . . . .   8
   12. Relocating Cells  . . . . . . . . . . . . . . . . . . . . . .   8
   13. Forced Cell Deletion Policy . . . . . . . . . . . . . . . . .   9
   14. 6P Error Handling . . . . . . . . . . . . . . . . . . . . . .   9
   15. Experimental requirements . . . . . . . . . . . . . . . . . .   9
   16. Security Considerations . . . . . . . . . . . . . . . . . . .  10
   17. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  10
     17.1.  SFX Scheduling Function Identifiers  . . . . . . . . . .  10
   18. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .  10
   19. References  . . . . . . . . . . . . . . . . . . . . . . . . .  11
     19.1.  Normative References . . . . . . . . . . . . . . . . . .  11
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