6TiSCH 6top Scheduling Function Zero (SF0)
draft-ietf-6tisch-6top-sf0-04

Document Type Active Internet-Draft (6tisch WG)
Last updated 2017-04-28
Replaces draft-dujovne-6tisch-6top-sf0
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6TiSCH                                                   D. Dujovne, Ed.
Internet-Draft                                Universidad Diego Portales
Intended status: Experimental                                 LA. Grieco
Expires: October 30, 2017                            Politecnico di Bari
                                                          MR. Palattella
                   Luxembourg Institute of Science and Technology (LIST)
                                                            N. Accettura
                                                               LAAS-CNRS
                                                          April 28, 2017

               6TiSCH 6top Scheduling Function Zero (SF0)
                     draft-ietf-6tisch-6top-sf0-04

Abstract

   This document defines a Scheduling Function called "Scheduling
   Function Zero" (SF0).  SF0 dynamically adapts the number of allocated
   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.  SF0 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

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   provisions of BCP 78 and BCP 79.

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Dujovne, et al.         Expires October 30, 2017                [Page 1]
Internet-Draft               6tisch-6top-sf0                  April 2017

   This Internet-Draft will expire on October 30, 2017.

Copyright Notice

   Copyright (c) 2017 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

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Table of Contents

   1.  TEMPORARY EDITORIAL NOTES . . . . . . . . . . . . . . . . . .   3
   2.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Scheduling Function Identifier  . . . . . . . . . . . . . . .   4
   4.  SF0 Triggering Events . . . . . . . . . . . . . . . . . . . .   4
   5.  SF0 Cell Estimation Algorithm . . . . . . . . . . . . . . . .   4
   6.  SF0 Allocation Policy . . . . . . . . . . . . . . . . . . . .   5
   7.  Rules for CellList  . . . . . . . . . . . . . . . . . . . . .   6
   8.  6P Timeout Value  . . . . . . . . . . . . . . . . . . . . . .   7
   9.  Meaning of Metadata Information . . . . . . . . . . . . . . .   7
   10. Node Behavior at Boot . . . . . . . . . . . . . . . . . . . .   7
   11. Cell Type . . . . . . . . . . . . . . . . . . . . . . . . . .   7
   12. SF0 Statistics  . . . . . . . . . . . . . . . . . . . . . . .   8
   13. Relocating Cells  . . . . . . . . . . . . . . . . . . . . . .   8
   14. Forced Cell Deletion Policy . . . . . . . . . . . . . . . . .   8
   15. 6P Error Handling . . . . . . . . . . . . . . . . . . . . . .   8
   16. Examples  . . . . . . . . . . . . . . . . . . . . . . . . . .   9
   17. Implementation Status . . . . . . . . . . . . . . . . . . . .   9
   18. Security Considerations . . . . . . . . . . . . . . . . . . .   9
   19. IANA Considerations . . . . . . . . . . . . . . . . . . . . .   9
   20. 6P Compliance . . . . . . . . . . . . . . . . . . . . . . . .  10
   21. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .  10
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