Building Power-Efficient CoAP Devices for Cellular Networks
draft-ietf-lwig-cellular-06
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MISSREF |
Network Working Group J. Arkko
Internet-Draft A. Eriksson
Intended status: Informational A. Keranen
Expires: July 7, 2016 Ericsson
January 4, 2016
Building Power-Efficient CoAP Devices for Cellular Networks
draft-ietf-lwig-cellular-06
Abstract
This memo discusses the use of the Constrained Application Protocol
(CoAP) protocol in building sensors and other devices that employ
cellular networks as a communications medium. Building communicating
devices that employ these networks is obviously well known, but this
memo focuses specifically on techniques necessary to minimize power
consumption.
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."
This Internet-Draft will expire on July 7, 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
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
Arkko, et al. Expires July 7, 2016 [Page 1]
Internet-Draft Power-Efficient Cellular CoAP devices January 2016
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Goals for Low-Power Operation . . . . . . . . . . . . . . . . 3
3. Link-Layer Assumptions . . . . . . . . . . . . . . . . . . . 5
4. Scenarios . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5. Discovery and Registration . . . . . . . . . . . . . . . . . 8
6. Data Formats . . . . . . . . . . . . . . . . . . . . . . . . 10
7. Real-Time Reachable Devices . . . . . . . . . . . . . . . . . 10
8. Sleepy Devices . . . . . . . . . . . . . . . . . . . . . . . 11
8.1. Implementation Considerations . . . . . . . . . . . . . . 12
9. Security Considerations . . . . . . . . . . . . . . . . . . . 13
10. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 13
11. References . . . . . . . . . . . . . . . . . . . . . . . . . 13
11.1. Normative References . . . . . . . . . . . . . . . . . . 13
11.2. Informative References . . . . . . . . . . . . . . . . . 14
Appendix A. Acknowledgments . . . . . . . . . . . . . . . . . . 15
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 15
1. Introduction
This memo discusses the use of the Constrained Application Protocol
(CoAP) protocol [RFC7252] in building sensors and other devices that
employ cellular networks as a communications medium. Building
communicating devices that employ these networks is obviously well
known, but this memo focuses specifically on techniques necessary to
minimize power consumption. CoAP has many advantages, including
being simple to implement; a thousand lines for the entire software
above IP layer is plenty for a CoAP-based sensor, for instance.
However, while many of these advantages are obvious and easily
obtained, optimizing power consumption remains challenging and
requires careful design [I-D.arkko-core-sleepy-sensors].
The memo targets primarily 3GPP cellular networks in their 2G, 3G,
and LTE variants and their future enhancements, including possible
power efficiency improvements at the radio and link layers. The
exact standards or details of the link layer or radios are not
relevant for our purposes, however. To be more precise, the material
in this memo is suitable for any large-scale, public network that
employs point-to-point communications model and radio technology for
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