Using IEEE 802.15.4e Time-Slotted Channel Hopping (TSCH) in the Internet of Things (IoT): Problem Statement
RFC 7554
Document | Type | RFC - Informational (May 2015; Errata) | |
---|---|---|---|
Authors | Thomas Watteyne , Maria Palattella , Luigi Grieco | ||
Last updated | 2015-10-14 | ||
Replaces | draft-watteyne-6tisch-tsch | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Reviews | |||
Stream | WG state | Submitted to IESG for Publication | |
Document shepherd | Pascal Thubert | ||
Shepherd write-up | Show (last changed 2015-02-06) | ||
IESG | IESG state | RFC 7554 (Informational) | |
Action Holders |
(None)
|
||
Consensus Boilerplate | Yes | ||
Telechat date | |||
Responsible AD | Ted Lemon | ||
Send notices to | (None) | ||
IANA | IANA review state | Version Changed - Review Needed | |
IANA action state | No IANA Actions |
Internet Engineering Task Force (IETF) T. Watteyne, Ed. Request for Comments: 7554 Linear Technology Category: Informational M. Palattella ISSN: 2070-1721 University of Luxembourg L. Grieco Politecnico di Bari May 2015 Using IEEE 802.15.4e Time-Slotted Channel Hopping (TSCH) in the Internet of Things (IoT): Problem Statement Abstract This document describes the environment, problem statement, and goals for using the Time-Slotted Channel Hopping (TSCH) Medium Access Control (MAC) protocol of IEEE 802.14.4e in the context of Low-Power and Lossy Networks (LLNs). The set of goals enumerated in this document form an initial set only. Status of This Memo This document is not an Internet Standards Track specification; it is published for informational purposes. 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). Not all documents approved by the IESG are a candidate for any level of Internet Standard; see Section 2 of RFC 5741. Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at http://www.rfc-editor.org/info/rfc7554. Watteyne, et al. Informational [Page 1] RFC 7554 6TiSCH-TSCH May 2015 Copyright Notice Copyright (c) 2015 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. Watteyne, et al. Informational [Page 2] RFC 7554 6TiSCH-TSCH May 2015 Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 4 2. TSCH in the LLN Context . . . . . . . . . . . . . . . . . . . 5 3. Problems and Goals . . . . . . . . . . . . . . . . . . . . . 7 3.1. Network Formation . . . . . . . . . . . . . . . . . . . . 8 3.2. Network Maintenance . . . . . . . . . . . . . . . . . . . 8 3.3. Multi-Hop Topology . . . . . . . . . . . . . . . . . . . 8 3.4. Routing and Timing Parents . . . . . . . . . . . . . . . 8 3.5. Resource Management . . . . . . . . . . . . . . . . . . . 9 3.6. Dataflow Control . . . . . . . . . . . . . . . . . . . . 9 3.7. Deterministic Behavior . . . . . . . . . . . . . . . . . 9 3.8. Scheduling Mechanisms . . . . . . . . . . . . . . . . . . 10 3.9. Secure Communication . . . . . . . . . . . . . . . . . . 10 4. Security Considerations . . . . . . . . . . . . . . . . . . . 11 5. References . . . . . . . . . . . . . . . . . . . . . . . . . 11 5.1. Normative References . . . . . . . . . . . . . . . . . . 11 5.2. Informative References . . . . . . . . . . . . . . . . . 11 Appendix A. TSCH Protocol Highlights . . . . . . . . . . . . . . 15 A.1. Time Slots . . . . . . . . . . . . . . . . . . . . . . . 15 A.2. Slotframes . . . . . . . . . . . . . . . . . . . . . . . 15 A.3. Node TSCH Schedule . . . . . . . . . . . . . . . . . . . 15 A.4. Cells and Bundles . . . . . . . . . . . . . . . . . . . . 16 A.5. Dedicated vs. Shared Cells . . . . . . . . . . . . . . . 17 A.6. Absolute Slot Number . . . . . . . . . . . . . . . . . . 17 A.7. Channel Hopping . . . . . . . . . . . . . . . . . . . . . 17 A.8. Time Synchronization . . . . . . . . . . . . . . . . . . 18 A.9. Power Consumption . . . . . . . . . . . . . . . . . . . . 19 A.10. Network TSCH Schedule . . . . . . . . . . . . . . . . . . 19 A.11. Join Process . . . . . . . . . . . . . . . . . . . . . . 19 A.12. Information Elements . . . . . . . . . . . . . . . . . . 20 A.13. Extensibility . . . . . . . . . . . . . . . . . . . . . . 20 Appendix B. TSCH Features . . . . . . . . . . . . . . . . . . . 21 B.1. Collision-Free Communication . . . . . . . . . . . . . . 21Show full document text