6TiSCH Operation Sublayer (6top) Protocol (6P)
RFC 8480
Internet Engineering Task Force (IETF) Q. Wang, Ed.
Request for Comments: 8480 Univ. of Sci. and Tech. Beijing
Category: Standards Track X. Vilajosana
ISSN: 2070-1721 Universitat Oberta de Catalunya
T. Watteyne
Analog Devices
November 2018
6TiSCH Operation Sublayer (6top) Protocol (6P)
Abstract
This document defines the "IPv6 over the TSCH mode of IEEE 802.15.4e"
(6TiSCH) Operation Sublayer (6top) Protocol (6P), which enables
distributed scheduling in 6TiSCH networks. 6P allows neighbor nodes
to add/delete Time-Slotted Channel Hopping (TSCH) cells to/on one
another. 6P is part of the 6TiSCH Operation Sublayer (6top), the
layer just above the IEEE Std 802.15.4 TSCH Medium Access Control
layer. 6top is composed of one or more Scheduling Functions (SFs)
and the 6top Protocol defined in this document. A 6top SF decides
when to add/delete cells, and it triggers 6P Transactions. The
definition of SFs is out of scope for this document; however, this
document provides the requirements for an SF.
Status of This Memo
This is an Internet Standards Track document.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by the
Internet Engineering Steering Group (IESG). Further information on
Internet Standards is available in Section 2 of RFC 7841.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
https://www.rfc-editor.org/info/rfc8480.
Wang, et al. Standards Track [Page 1]
RFC 8480 6top Protocol (6P) November 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
Provisions Relating to IETF Documents
(https://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. Introduction ....................................................3
1.1. Requirements Language ......................................5
2. 6TiSCH Operation Sublayer (6top) ................................5
2.1. Hard/Soft Cells ............................................6
2.2. Using 6P with the Minimal 6TiSCH Configuration .............6
3. 6top Protocol (6P) ..............................................7
3.1. 6P Transactions ............................................7
3.1.1. 2-Step 6P Transaction ...............................8
3.1.2. 3-Step 6P Transaction ..............................10
3.2. Message Format ............................................12
3.2.1. 6top Information Element (IE) ......................12
3.2.2. Generic 6P Message Format ..........................12
3.2.3. 6P CellOptions .....................................13
3.2.4. 6P CellList ........................................16
3.3. 6P Commands and Operations ................................17
3.3.1. Adding Cells .......................................17
3.3.2. Deleting Cells .....................................19
3.3.3. Relocating Cells ...................................21
3.3.4. Counting Cells .....................................27
3.3.5. Listing Cells ......................................28
3.3.6. Clearing the Schedule ..............................30
3.3.7. Generic Signaling between SFs ......................31
3.4. Protocol Functional Details ...............................31
3.4.1. Version Checking ...................................31
3.4.2. SFID Checking ......................................32
3.4.3. Concurrent 6P Transactions .........................32
3.4.4. 6P Timeout .........................................33
3.4.5. Aborting a 6P Transaction ..........................33
3.4.6. SeqNum Management ..................................33
3.4.7. Handling Error Responses ...........................40
3.5. Security ..................................................40
Show full document text