6TiSCH 6top Scheduling Function Zero (SF0)
draft-ietf-6tisch-6top-sf0-00

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Last updated 2016-05-13
Replaces draft-dujovne-6tisch-6top-sf0
Replaced by draft-ietf-6tisch-6top-sfx
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6TiSCH                                                   D. Dujovne, Ed.
Internet-Draft                                Universidad Diego Portales
Intended status: Informational                                LA. Grieco
Expires: November 13, 2016                           Politecnico di Bari
                                                          MR. Palattella
                                                University of Luxembourg
                                                            N. Accettura
                                       University of California Berkeley
                                                            May 12, 2016

               6TiSCH 6top Scheduling Function Zero (SF0)
                     draft-ietf-6tisch-6top-sf0-00

Abstract

   This document defines a 6top Scheduling Function called "Scheduling
   Function Zero" (SF0).  SF0 dynamically adapts the number of reserved
   cells between neighbor nodes, based on the currently allocated
   bandwidth and the neighbour nodes' requirements.  Neighbor nodes
   negotiate in a distributed neighbor-to-neighbor basis the cell(s) to
   be added/deleted.  SF0 uses the 6P signaling messages to add/delete
   cells in the schedule.  Some basic rules for deciding when to add/
   delete cells and for selecting the cells to be added/deleted within
   the schedule are also provided.

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.

   Internet-Drafts are working documents of the Internet Engineering
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   material or to cite them other than as "work in progress."

Dujovne, et al.         Expires November 13, 2016               [Page 1]
Internet-Draft               6tisch-6top-sf0                    May 2016

   This Internet-Draft will expire on November 13, 2016.

Copyright Notice

   Copyright (c) 2016 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
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Scheduling Function Identifier  . . . . . . . . . . . . . . .   3
   3.  Rules for Adding/Deleting Cells . . . . . . . . . . . . . . .   3
     3.1.  SF0 Triggering Events . . . . . . . . . . . . . . . . . .   3
     3.2.  SF0 Bandwidth Estimation Algorithm  . . . . . . . . . . .   3
     3.3.  SF0 Allocation Policy . . . . . . . . . . . . . . . . . .   4
   4.  Rules for CellList  . . . . . . . . . . . . . . . . . . . . .   5
   5.  6P Timeout Value  . . . . . . . . . . . . . . . . . . . . . .   6
   6.  Meaning of Metadata Information . . . . . . . . . . . . . . .   6
   7.  Node Behavior at Boot . . . . . . . . . . . . . . . . . . . .   6
   8.  Relocating Cells  . . . . . . . . . . . . . . . . . . . . . .   6
   9.  Forced Cell Deletion Policy . . . . . . . . . . . . . . . . .   7
   10. 6P Error Handling . . . . . . . . . . . . . . . . . . . . . .   7
   11. Examples  . . . . . . . . . . . . . . . . . . . . . . . . . .   7
   12. Implementation Status . . . . . . . . . . . . . . . . . . . .   7
   13. Security Considerations . . . . . . . . . . . . . . . . . . .   8
   14. IANA Considerations . . . . . . . . . . . . . . . . . . . . .   8
   15. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .   8
   16. References  . . . . . . . . . . . . . . . . . . . . . . . . .   8
     16.1.  Normative References . . . . . . . . . . . . . . . . . .   8
     16.2.  Informative References . . . . . . . . . . . . . . . . .   9
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   9

1.  Introduction

   This document defines the Scheduling Function for the 6top sublayer
   [I-D.wang-6tisch-6top-sublayer] called "Scheduling Function Zero"
   (SF0).
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