draft-ietf-lwig-cellular-01.txt		draft-ietf-lwig-cellular-02.txt
	Network Working Group J. Arkko		Network Working Group J. Arkko
	Internet-Draft A. Eriksson		Internet-Draft A. Eriksson
	Intended status: Informational A. Keranen		Intended status: Informational A. Keranen
	Expires: August 17, 2014 Ericsson		Expires: February 14, 2015 Ericsson
	February 13, 2014		August 13, 2014
	Building Power-Efficient CoAP Devices for Cellular Networks		Building Power-Efficient CoAP Devices for Cellular Networks
	draft-ietf-lwig-cellular-01		draft-ietf-lwig-cellular-02
	Abstract		Abstract
	This memo discusses the use of the Constrained Application Protocol		This memo discusses the use of the Constrained Application Protocol
	(CoAP) protocol in building sensors and other devices that employ		(CoAP) protocol in building sensors and other devices that employ
	cellular networks as a communications medium. Building communicating		cellular networks as a communications medium. Building communicating
	devices that employ these networks is obviously well known, but this		devices that employ these networks is obviously well known, but this
	memo focuses specifically on techniques necessary to minimize power		memo focuses specifically on techniques necessary to minimize power
	consumption.		consumption.
	skipping to change at page 1, line 36		skipping to change at page 1, line 36
	Internet-Drafts are working documents of the Internet Engineering		Internet-Drafts are working documents of the Internet Engineering
	Task Force (IETF). Note that other groups may also distribute		Task Force (IETF). Note that other groups may also distribute
	working documents as Internet-Drafts. The list of current Internet-		working documents as Internet-Drafts. The list of current Internet-
	Drafts is at http://datatracker.ietf.org/drafts/current/.		Drafts is at http://datatracker.ietf.org/drafts/current/.
	Internet-Drafts are draft documents valid for a maximum of six months		Internet-Drafts are draft documents valid for a maximum of six months
	and may be updated, replaced, or obsoleted by other documents at any		and may be updated, replaced, or obsoleted by other documents at any
	time. It is inappropriate to use Internet-Drafts as reference		time. It is inappropriate to use Internet-Drafts as reference
	material or to cite them other than as "work in progress."		material or to cite them other than as "work in progress."
	This Internet-Draft will expire on August 17, 2014.		This Internet-Draft will expire on February 14, 2015.
	Copyright Notice		Copyright Notice
	Copyright (c) 2014 IETF Trust and the persons identified as the		Copyright (c) 2014 IETF Trust and the persons identified as the
	document authors. All rights reserved.		document authors. All rights reserved.
	This document is subject to BCP 78 and the IETF Trust's Legal		This document is subject to BCP 78 and the IETF Trust's Legal
	Provisions Relating to IETF Documents		Provisions Relating to IETF Documents
	(http://trustee.ietf.org/license-info) in effect on the date of		(http://trustee.ietf.org/license-info) in effect on the date of
	publication of this document. Please review these documents		publication of this document. Please review these documents
	skipping to change at page 9, line 8		skipping to change at page 9, line 8
	connected to the network and that it is reachable at a given IP		connected to the network and that it is reachable at a given IP
	address.		address.
	The registration part is easy; a resource directory or mirror proxy		The registration part is easy; a resource directory or mirror proxy
	can be used. The device should perform the necessary registration		can be used. The device should perform the necessary registration
	with these devices, for instance, as specified in		with these devices, for instance, as specified in
	[I-D.ietf-core-resource-directory] and [I-D.vial-core-mirror-proxy].		[I-D.ietf-core-resource-directory] and [I-D.vial-core-mirror-proxy].
	In order to do this registration, the device needs to know its CORE		In order to do this registration, the device needs to know its CORE
	Link Format description, as specified in [RFC6690]. In essence, the		Link Format description, as specified in [RFC6690]. In essence, the
	registration process involves performing a GET on .well-known/core/		registration process involves performing a GET on .well-known/
	?rt=core-rd at the address of the resource directory (or rt=core-mp		core/?rt=core-rd at the address of the resource directory (or
	for mirror proxies), and then doing a POST on the path of the		rt=core-mp for mirror proxies), and then doing a POST on the path of
	discovered resource.		the discovered resource.
	However, current CoAP specifications provide limited support for		However, current CoAP specifications provide limited support for
	discovering the resource directory or mirror proxy. Local multicast		discovering the resource directory or mirror proxy. Local multicast
	discovery only works in LAN-type networks, but not in these public		discovery only works in LAN-type networks, but not in these public
	cellular networks. Our recommended alternate methods for discovery		cellular networks. Our recommended alternate methods for discovery
	are the following:		are the following:
	Manual Configuration		Manual Configuration
	The DNS name of the resource directory or mirror proxy is manually		The DNS name of the resource directory or mirror proxy is manually
	skipping to change at page 14, line 7		skipping to change at page 14, line 7
	[RFC6690] Shelby, Z., "Constrained RESTful Environments (CoRE) Link		[RFC6690] Shelby, Z., "Constrained RESTful Environments (CoRE) Link
	Format", RFC 6690, August 2012.		Format", RFC 6690, August 2012.
	[I-D.ietf-core-coap]		[I-D.ietf-core-coap]
	Shelby, Z., Hartke, K., and C. Bormann, "Constrained		Shelby, Z., Hartke, K., and C. Bormann, "Constrained
	Application Protocol (CoAP)", draft-ietf-core-coap-18		Application Protocol (CoAP)", draft-ietf-core-coap-18
	(work in progress), June 2013.		(work in progress), June 2013.
	[I-D.ietf-core-observe]		[I-D.ietf-core-observe]
	Hartke, K., "Observing Resources in CoAP", draft-ietf-		Hartke, K., "Observing Resources in CoAP", draft-ietf-
	core-observe-11 (work in progress), October 2013.		core-observe-14 (work in progress), June 2014.
	[I-D.vial-core-mirror-proxy]		[I-D.vial-core-mirror-proxy]
	Vial, M., "CoRE Mirror Server", draft-vial-core-mirror-		Vial, M., "CoRE Mirror Server", draft-vial-core-mirror-
	proxy-01 (work in progress), July 2012.		proxy-01 (work in progress), July 2012.
	[I-D.ietf-core-resource-directory]		[I-D.ietf-core-resource-directory]
	Shelby, Z., Bormann, C., and S. Krco, "CoRE Resource		Shelby, Z., Bormann, C., and S. Krco, "CoRE Resource
	Directory", draft-ietf-core-resource-directory-01 (work in		Directory", draft-ietf-core-resource-directory-01 (work in
	progress), December 2013.		progress), December 2013.
	skipping to change at page 15, line 16		skipping to change at page 15, line 16
	Castellani, A. and S. Loreto, "CoAP Alive Message", draft-		Castellani, A. and S. Loreto, "CoAP Alive Message", draft-
	castellani-core-alive-00 (work in progress), March 2012.		castellani-core-alive-00 (work in progress), March 2012.
	[I-D.fossati-core-publish-monitor-options]		[I-D.fossati-core-publish-monitor-options]
	Fossati, T., Giacomin, P., and S. Loreto, "Publish and		Fossati, T., Giacomin, P., and S. Loreto, "Publish and
	Monitor Options for CoAP", draft-fossati-core-publish-		Monitor Options for CoAP", draft-fossati-core-publish-
	monitor-options-01 (work in progress), March 2012.		monitor-options-01 (work in progress), March 2012.
	[Android-Bundle]		[Android-Bundle]
	"Optimizing Downloads for Efficient Network Access",		"Optimizing Downloads for Efficient Network Access",
	Android developer note http://developer.android.com/		Android developer note
	training/efficient-downloads/		http://developer.android.com/training/efficient-downloads/
	efficient-network-access.html, February 2013.		efficient-network-access.html, February 2013.
	Appendix A. Acknowledgments		Appendix A. Acknowledgments
	The authors would like to thank Zach Shelby, Jan Holler, Salvatore		The authors would like to thank Zach Shelby, Jan Holler, Salvatore
	Loreto, Matthew Vial, Thomas Fossati, Mohit Sethi, Jan Melen, Joachim		Loreto, Matthew Vial, Thomas Fossati, Mohit Sethi, Jan Melen, Joachim
	Sachs, Heidi-Maria Rissanen, Sebastien Pierrel, Kumar Balachandran,		Sachs, Heidi-Maria Rissanen, Sebastien Pierrel, Kumar Balachandran,
	Muhammad Waqas Mir, Cullen Jennings, Markus Isomaki, Hannes		Muhammad Waqas Mir, Cullen Jennings, Markus Isomaki, Hannes
	Tschofenig, and Anna Larmo for interesting discussions in this		Tschofenig, and Anna Larmo for interesting discussions in this
	problem space.		problem space.
End of changes. 6 change blocks.
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