6TiSCH 6top Scheduling Function Zero (SF0)
draft-ietf-6tisch-6top-sf0-04
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
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
Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet-
Drafts is at http://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
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.
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
carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
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
Show full document text