< draft-ietf-6lo-nfc-01.txt		draft-ietf-6lo-nfc-02.txt >
	6Lo Working Group Y-G. Hong		6Lo Working Group Y-G. Hong
	Internet-Draft Y-H. Choi		Internet-Draft Y-H. Choi
	Intended status: Standards Track ETRI		Intended status: Standards Track ETRI
	Expires: January 6, 2016 J-S. Youn		Expires: April 19, 2016 J-S. Youn
	DONG-EUI Univ		DONG-EUI Univ
	D-K. Kim		D-K. Kim
	KNU		KNU
	J-H. Choi		J-H. Choi
	Samsung Electronics Co.,		Samsung Electronics Co.,
	July 5, 2015		October 17, 2015
	Transmission of IPv6 Packets over Near Field Communication		Transmission of IPv6 Packets over Near Field Communication
	draft-ietf-6lo-nfc-01		draft-ietf-6lo-nfc-02
	Abstract		Abstract
	Near field communication (NFC) is a set of standards for smartphones		Near field communication (NFC) is a set of standards for smartphones
	and portable devices to establish radio communication with each other		and portable devices to establish radio communication with each other
	by touching them together or bringing them into proximity, usually no		by touching them together or bringing them into proximity, usually no
	more than 10 cm. NFC standards cover communications protocols and		more than 10 cm. NFC standards cover communications protocols and
	data exchange formats, and are based on existing radio-frequency		data exchange formats, and are based on existing radio-frequency
	identification (RFID) standards including ISO/IEC 14443 and FeliCa.		identification (RFID) standards including ISO/IEC 14443 and FeliCa.
	The standards include ISO/IEC 18092 and those defined by the NFC		The standards include ISO/IEC 18092 and those defined by the NFC
	skipping to change at page 1, line 46 ¶		skipping to change at page 1, line 46 ¶
	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 January 6, 2016.		This Internet-Draft will expire on April 19, 2016.
	Copyright Notice		Copyright Notice
	Copyright (c) 2015 IETF Trust and the persons identified as the		Copyright (c) 2015 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 2, line 35 ¶		skipping to change at page 2, line 35 ¶
	3.1. Peer-to-peer Mode of NFC . . . . . . . . . . . . . . . . 4		3.1. Peer-to-peer Mode of NFC . . . . . . . . . . . . . . . . 4
	3.2. Protocol Stacks of NFC . . . . . . . . . . . . . . . . . 5		3.2. Protocol Stacks of NFC . . . . . . . . . . . . . . . . . 5
	3.3. NFC-enabled Device Addressing . . . . . . . . . . . . . . 6		3.3. NFC-enabled Device Addressing . . . . . . . . . . . . . . 6
	3.4. NFC MAC PDU Size and MTU . . . . . . . . . . . . . . . . 6		3.4. NFC MAC PDU Size and MTU . . . . . . . . . . . . . . . . 6
	4. Specification of IPv6 over NFC . . . . . . . . . . . . . . . 8		4. Specification of IPv6 over NFC . . . . . . . . . . . . . . . 8
	4.1. Protocol Stacks . . . . . . . . . . . . . . . . . . . . . 8		4.1. Protocol Stacks . . . . . . . . . . . . . . . . . . . . . 8
	4.2. Link Model . . . . . . . . . . . . . . . . . . . . . . . 9		4.2. Link Model . . . . . . . . . . . . . . . . . . . . . . . 9
	4.3. Stateless Address Autoconfiguration . . . . . . . . . . . 10		4.3. Stateless Address Autoconfiguration . . . . . . . . . . . 10
	4.4. IPv6 Link Local Address . . . . . . . . . . . . . . . . . 10		4.4. IPv6 Link Local Address . . . . . . . . . . . . . . . . . 10
	4.5. Neighbor Discovery . . . . . . . . . . . . . . . . . . . 11		4.5. Neighbor Discovery . . . . . . . . . . . . . . . . . . . 11
	4.6. Header Compression . . . . . . . . . . . . . . . . . . . 11		4.6. Dispatch Header . . . . . . . . . . . . . . . . . . . . . 11
	4.7. Fragmentation and Reassembly . . . . . . . . . . . . . . 12		4.7. Header Compression . . . . . . . . . . . . . . . . . . . 12
	4.8. Unicast Address Mapping . . . . . . . . . . . . . . . . . 12		4.8. Fragmentation and Reassembly . . . . . . . . . . . . . . 12
	4.9. Multicast Address Mapping . . . . . . . . . . . . . . . . 13		4.9. Unicast Address Mapping . . . . . . . . . . . . . . . . . 13
	5. Internet Connectivity Scenarios . . . . . . . . . . . . . . . 13		4.10. Multicast Address Mapping . . . . . . . . . . . . . . . . 13
	5.1. NFC-enabled Device Connected to the Internet . . . . . . 13		5. Internet Connectivity Scenarios . . . . . . . . . . . . . . . 14
	5.2. Isolated NFC-enabled Device Network . . . . . . . . . . . 14		5.1. NFC-enabled Device Connected to the Internet . . . . . . 14
	6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 14		5.2. Isolated NFC-enabled Device Network . . . . . . . . . . . 15
	7. Security Considerations . . . . . . . . . . . . . . . . . . . 14		6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 15
	8. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 14		7. Security Considerations . . . . . . . . . . . . . . . . . . . 15
			8. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 15
	9. References . . . . . . . . . . . . . . . . . . . . . . . . . 15		9. References . . . . . . . . . . . . . . . . . . . . . . . . . 15
	9.1. Normative References . . . . . . . . . . . . . . . . . . 15		9.1. Normative References . . . . . . . . . . . . . . . . . . 15
	9.2. Informative References . . . . . . . . . . . . . . . . . 15		9.2. Informative References . . . . . . . . . . . . . . . . . 17
	Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 16		Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 17
	1. Introduction		1. Introduction
	NFC is a set of short-range wireless technologies, typically		NFC is a set of short-range wireless technologies, typically
	requiring a distance of 10 cm or less. NFC operates at 13.56 MHz on		requiring a distance of 10 cm or less. NFC operates at 13.56 MHz on
	ISO/IEC 18000-3 air interface and at rates ranging from 106 kbit/s to		ISO/IEC 18000-3 air interface and at rates ranging from 106 kbit/s to
	424 kbit/s. NFC always involves an initiator and a target; the		424 kbit/s. NFC always involves an initiator and a target; the
	initiator actively generates an RF field that can power a passive		initiator actively generates an RF field that can power a passive
	target. This enables NFC targets to take very simple form factors		target. This enables NFC targets to take very simple form factors
	such as tags, stickers, key fobs, or cards that do not require		such as tags, stickers, key fobs, or cards that do not require
	skipping to change at page 8, line 21 ¶		skipping to change at page 8, line 21 ¶
	of the MTU in NFC LLCP SHALL calculate 2176 bytes.		of the MTU in NFC LLCP SHALL calculate 2176 bytes.
	4. Specification of IPv6 over NFC		4. Specification of IPv6 over NFC
	NFC technology sets also has considerations and requirements owing to		NFC technology sets also has considerations and requirements owing to
	low power consumption and allowed protocol overhead. 6LoWPAN		low power consumption and allowed protocol overhead. 6LoWPAN
	standards RFC4944 [1], RFC6775 [4], and RFC6282 [5] provide useful		standards RFC4944 [1], RFC6775 [4], and RFC6282 [5] provide useful
	functionality for reducing overhead which can be applied to BT-LE.		functionality for reducing overhead which can be applied to BT-LE.
	This functionality comprises of link-local IPv6 addresses and		This functionality comprises of link-local IPv6 addresses and
	stateless IPv6 address auto-configuration (see Section 4.3), Neighbor		stateless IPv6 address auto-configuration (see Section 4.3), Neighbor
	Discovery (see Section 4.5) and header compression (see Section 4.6).		Discovery (see Section 4.5) and header compression (see Section 4.7).
	One of the differences between IEEE 802.15.4 and NFC is that the		One of the differences between IEEE 802.15.4 and NFC is that the
	former supports both star and mesh topology (and requires a routing		former supports both star and mesh topology (and requires a routing
	protocol), whereas NFC can support direct peer-to-peer connection and		protocol), whereas NFC can support direct peer-to-peer connection and
	simple mesh-like topology depending on NFC application scenarios		simple mesh-like topology depending on NFC application scenarios
	because of very short RF distance of 10 cm or less.		because of very short RF distance of 10 cm or less.
	4.1. Protocol Stacks		4.1. Protocol Stacks
	Figure 5 illustrates IPv6 over NFC. Upper layer protocols can be		Figure 5 illustrates IPv6 over NFC. Upper layer protocols can be
	skipping to change at page 11, line 29 ¶		skipping to change at page 11, line 29 ¶
	to 6LBR, A NFC 6LN MUST register its address with the 6LBR by		to 6LBR, A NFC 6LN MUST register its address with the 6LBR by
	sending a Neighbor Solicitation (NS) message with the Address		sending a Neighbor Solicitation (NS) message with the Address
	Registration Option (ARO) and process the Neighbor Advertisement		Registration Option (ARO) and process the Neighbor Advertisement
	(NA) accordingly. In addition, DHCPv6 is used to assigned an		(NA) accordingly. In addition, DHCPv6 is used to assigned an
	address, Duplicate Address Detection (DAD) is not required.		address, Duplicate Address Detection (DAD) is not required.
	2. For sending Router Solicitations and processing Router		2. For sending Router Solicitations and processing Router
	Advertisements the NFC 6LNs MUST follow Sections 5.3 and 5.4 of		Advertisements the NFC 6LNs MUST follow Sections 5.3 and 5.4 of
	the RFC6775.		the RFC6775.
	4.6. Header Compression		4.6. Dispatch Header
			All IPv6-over-NFC encapsulated datagrams transmitted over NFC are
			prefixed by an encapsulation header stack consisting of a Dispatch
			value followed by zero or more header fields. The only sequence
			currently defined for IPv6-over-NFC is the LOWPAN_IPHC header
			followed by payload, as depicted in Figure 8.
			+---------------+---------------+--------------+
			| IPHC Dispatch | IPHC Header | Payload |
			+---------------+---------------+--------------+
			Figure 8: A IPv6-over-NFC Encapsulated 6LOWPAN_IPHC Compressed IPv6
			Datagram
			The dispatch value may be treated as an unstructured namespace. Only
			a single pattern is used to represent current LoBAC functionality.
			+------------+--------------------+-----------+
			| Pattern | Header Type | Reference |
			+------------+--------------------+-----------+
			| 01 1xxxxx | 6LOWPAN_IPHC | [RFC6282] |
			+------------+--------------------+-----------+
			Figure 9: Dispatch Values
			Other IANA-assigned 6LoWPAN Dispatch values do not apply to this
			specification.
			4.7. Header Compression
	Header compression as defined in RFC6282 [5] , which specifies the		Header compression as defined in RFC6282 [5] , which specifies the
	compression format for IPv6 datagrams on top of IEEE 802.15.4, is		compression format for IPv6 datagrams on top of IEEE 802.15.4, is
	REQUIRED in this document as the basis for IPv6 header compression on		REQUIRED in this document as the basis for IPv6 header compression on
	top of NFC. All headers MUST be compressed according to RFC6282		top of NFC. All headers MUST be compressed according to RFC6282
	encoding formats.		encoding formats.
			Therefore, IPv6 header compression in RFC6282 [5] MUST be
			implemented. Further, implementations MAY also support Generic
			Header Compression (GHC) of RFC7400 [11]. A node implementing GHC
			MUST probe its peers for GHC support before applying GHC.
	If a 16-bit address is required as a short address of IEEE 802.15.4,		If a 16-bit address is required as a short address of IEEE 802.15.4,
	it MUST be formed by padding the 6-bit NFC link-layer (node) address		it MUST be formed by padding the 6-bit NFC link-layer (node) address
	to the left with zeros as shown in Figure 8.		to the left with zeros as shown in Figure 10.
	0 1		0 1
	0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5		0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	| Padding(all zeros)| NFC Addr. |		| Padding(all zeros)| NFC Addr. |
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	Figure 8: NFC short adress format		Figure 10: NFC short adress format
	4.7. Fragmentation and Reassembly		4.8. Fragmentation and Reassembly
	NFC provides fragmentation and reassembly (FAR) for payloads from 128		NFC provides fragmentation and reassembly (FAR) for payloads from 128
	bytes up to 2176 bytes as mention in Section 3.4. The MTU of a		bytes up to 2176 bytes as mention in Section 3.4. The MTU of a
	general IPv6 packet can fit into a sigle NFC link frame. Therefore,		general IPv6 packet can fit into a sigle NFC link frame. Therefore,
	the FAR functionality as defined in RFC4944, which specifies the		the FAR functionality as defined in RFC4944, which specifies the
	fragmentation methods for IPv6 datagrams on top of IEEE 802.15.4, is		fragmentation methods for IPv6 datagrams on top of IEEE 802.15.4, is
	NOT REQUIRED in this document as the basis for IPv6 datagram FAR on		NOT REQUIRED in this document as the basis for IPv6 datagram FAR on
	top of NFC. The NFC link connection for IPv6 over NFC MUST be		top of NFC. The NFC link connection for IPv6 over NFC MUST be
	configured with an equivalent MIU size to fit the MTU of IPv6 Packet.		configured with an equivalent MIU size to fit the MTU of IPv6 Packet.
	However, the default configuration of MIUX value is 0x480 in order to		However, the default configuration of MIUX value is 0x480 in order to
	fit the MTU (1280 bytes) of a IPv6 packet.		fit the MTU (1280 bytes) of a IPv6 packet.
	4.8. Unicast Address Mapping		4.9. Unicast Address Mapping
	The address resolution procedure for mapping IPv6 non-multicast		The address resolution procedure for mapping IPv6 non-multicast
	addresses into NFC link-layer addresses follows the general		addresses into NFC link-layer addresses follows the general
	description in Section 7.2 of RFC4861 [9], unless otherwise		description in Section 7.2 of RFC4861 [9], unless otherwise
	specified.		specified.
	The Source/Target link-layer Address option has the following form		The Source/Target link-layer Address option has the following form
	when the addresses are 6-bit NFC link-layer (node) addresses.		when the addresses are 6-bit NFC link-layer (node) addresses.
	0 1		0 1
	skipping to change at page 12, line 40 ¶		skipping to change at page 13, line 27 ¶
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	| Type | Length=1 |		| Type | Length=1 |
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	| |		| |
	+- Padding (all zeros) -+		+- Padding (all zeros) -+
	| |		| |
	+- +-+-+-+-+-+-+		+- +-+-+-+-+-+-+
	| | NFC Addr. |		| | NFC Addr. |
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	Figure 9: Unicast address mapping		Figure 11: Unicast address mapping
	Option fields:		Option fields:
	Type:		Type:
	1: for Source Link-layer address.		1: for Source Link-layer address.
	2: for Target Link-layer address.		2: for Target Link-layer address.
	Length:		Length:
	This is the length of this option (including the type and		This is the length of this option (including the type and
	length fields) in units of 8 octets. The value of this field		length fields) in units of 8 octets. The value of this field
	is 1 for 6-bit NFC node addresses.		is 1 for 6-bit NFC node addresses.
	NFC address:		NFC address:
	The 6-bit address in canonical bit order. This is the unicast		The 6-bit address in canonical bit order. This is the unicast
	address the interface currently responds to.		address the interface currently responds to.
	4.9. Multicast Address Mapping		4.10. Multicast Address Mapping
	All IPv6 multicast packets MUST be sent to NFC Destination Address,		All IPv6 multicast packets MUST be sent to NFC Destination Address,
	0x3F (broadcast) and filtered at the IPv6 layer. When represented as		0x3F (broadcast) and filtered at the IPv6 layer. When represented as
	a 16-bit address in a compressed header, it MUST be formed by padding		a 16-bit address in a compressed header, it MUST be formed by padding
	on the left with a zero. In addition, the NFC Destination Address,		on the left with a zero. In addition, the NFC Destination Address,
	0x3F, MUST not be used as a unicast NFC address of SSAP or DSAP.		0x3F, MUST not be used as a unicast NFC address of SSAP or DSAP.
	0 1		0 1
	0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5		0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	| Padding(all zeros)|1 1 1 1 1 1|		| Padding(all zeros)|1 1 1 1 1 1|
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	Figure 10: Multicast address mapping		Figure 12: Multicast address mapping
	5. Internet Connectivity Scenarios		5. Internet Connectivity Scenarios
	As two typical scenarios, the NFC network can be isolated and		As two typical scenarios, the NFC network can be isolated and
	connected to the Internet.		connected to the Internet.
	5.1. NFC-enabled Device Connected to the Internet		5.1. NFC-enabled Device Connected to the Internet
	One of the key applications by using adaptation technology of IPv6		One of the key applications by using adaptation technology of IPv6
	over NFC is the most securely transmitting IPv6 packets because RF		over NFC is the most securely transmitting IPv6 packets because RF
	distance between 6LN and 6LBR SHOULD be within 10 cm. If any third		distance between 6LN and 6LBR SHOULD be within 10 cm. If any third
	party wants to hack into the RF between them, it MUST come to nearly		party wants to hack into the RF between them, it MUST come to nearly
	touch them. Applications can choose which kinds of air interfaces		touch them. Applications can choose which kinds of air interfaces
	(e.g., BT-LE, Wi-Fi, NFC, etc.) to send data depending		(e.g., BT-LE, Wi-Fi, NFC, etc.) to send data depending
	characteristics of data. NFC SHALL be the best solution for secured		characteristics of data. NFC SHALL be the best solution for secured
	and private information.		and private information.
	Figure 11 illustrates an example of NFC-enabled device network		Figure 13 illustrates an example of NFC-enabled device network
	connected to the Internet. Distance between 6LN and 6LBR SHOULD be		connected to the Internet. Distance between 6LN and 6LBR SHOULD be
	10 cm or less. If there is any of close laptop computers to a user,		10 cm or less. If there is any of close laptop computers to a user,
	it SHALL becomes the 6LBR. Additionally, When the user mounts a NFC-		it SHALL becomes the 6LBR. Additionally, When the user mounts a NFC-
	enabled air interface adapter (e.g., portable small NFC dongle) on		enabled air interface adapter (e.g., portable small NFC dongle) on
	the close laptop PC, the user's NFC-enabled device (6LN) can		the close laptop PC, the user's NFC-enabled device (6LN) can
	communicate the laptop PC (6LBR) within 10 cm distance.		communicate the laptop PC (6LBR) within 10 cm distance.
	************		************
	6LN ------------------- 6LBR -----* Internet *------- CN		6LN ------------------- 6LBR -----* Internet *------- CN
	| (dis. 10 cm or less) | ************ |		| (dis. 10 cm or less) | ************ |
	| | |		| | |
	| <-------- NFC -------> | <----- IPv6 packet ------> |		| <-------- NFC -------> | <----- IPv6 packet ------> |
	| (IPv6 over NFC packet) | |		| (IPv6 over NFC packet) | |
	Figure 11: NFC-enabled device network connected to the Internet		Figure 13: NFC-enabled device network connected to the Internet
	5.2. Isolated NFC-enabled Device Network		5.2. Isolated NFC-enabled Device Network
	In some scenarios, the NFC-enabled device network may transiently be		In some scenarios, the NFC-enabled device network may transiently be
	a simple isolated network as shown in the Figure 12.		a simple isolated network as shown in the Figure 14.
	6LN ---------------------- 6LR ---------------------- 6LN		6LN ---------------------- 6LR ---------------------- 6LN
	| (10 cm or less) | (10 cm or less) |		| (10 cm or less) | (10 cm or less) |
	| | |		| | |
	| <--------- NFC --------> | <--------- NFC --------> |		| <--------- NFC --------> | <--------- NFC --------> |
	| (IPv6 over NFC packet) | (IPv6 over NFC packet) |		| (IPv6 over NFC packet) | (IPv6 over NFC packet) |
	Figure 12: Isolated NFC-enabled device network		Figure 14: Isolated NFC-enabled device network
	In mobile phone markets, applications are designed and made by user		In mobile phone markets, applications are designed and made by user
	developers. They may image interesting applications, where three or		developers. They may image interesting applications, where three or
	more mobile phones touch or attach each other to accomplish		more mobile phones touch or attach each other to accomplish
	outstanding performance. For instance, three or more mobile phones		outstanding performance. For instance, three or more mobile phones
	can play multi-channel sound of music together. In addition,		can play multi-channel sound of music together. In addition,
	attached three or more mobile phones can make an extended banner to		attached three or more mobile phones can make an extended banner to
	show longer sentences in a concert hall.		show longer sentences in a concert hall.
	6. IANA Considerations		6. IANA Considerations
	skipping to change at page 15, line 11 ¶		skipping to change at page 15, line 51 ¶
	Michael Richardson, Suresh Krishnan, Pascal Thubert, Carsten Bormann,		Michael Richardson, Suresh Krishnan, Pascal Thubert, Carsten Bormann,
	and Alexandru Petrescu have provided valuable feedback for this		and Alexandru Petrescu have provided valuable feedback for this
	draft.		draft.
	9. References		9. References
	9.1. Normative References		9.1. Normative References
	[1] Montenegro, G., Kushalnagar, N., Hui, J., and D. Culler,		[1] Montenegro, G., Kushalnagar, N., Hui, J., and D. Culler,
	"Transmission of IPv6 Packets over IEEE 802.15.4		"Transmission of IPv6 Packets over IEEE 802.15.4
	Networks", RFC 4944, September 2007.		Networks", RFC 4944, DOI 10.17487/RFC4944, September 2007,
			<http://www.rfc-editor.org/info/rfc4944>.
	[2] Bradner, S., "Key words for use in RFCs to Indicate		[2] Bradner, S., "Key words for use in RFCs to Indicate
	Requirement Levels", BCP 14, RFC 2119, March 1997.		Requirement Levels", BCP 14, RFC 2119,
			DOI 10.17487/RFC2119, March 1997,
			<http://www.rfc-editor.org/info/rfc2119>.
	[3] "Logical Link Control Protocol version 1.1", NFC Forum		[3] "Logical Link Control Protocol version 1.1", NFC Forum
	Technical Specification , June 2011.		Technical Specification , June 2011.
	[4] Shelby, Z., Chakrabarti, S., Nordmark, E., and C. Bormann,		[4] Shelby, Z., Ed., Chakrabarti, S., Nordmark, E., and C.
	"Neighbor Discovery Optimization for IPv6 over Low-Power		Bormann, "Neighbor Discovery Optimization for IPv6 over
	Wireless Personal Area Networks (6LoWPANs)", RFC 6775,		Low-Power Wireless Personal Area Networks (6LoWPANs)",
	November 2012.		RFC 6775, DOI 10.17487/RFC6775, November 2012,
			<http://www.rfc-editor.org/info/rfc6775>.
	[5] Hui, J. and P. Thubert, "Compression Format for IPv6		[5] Hui, J., Ed. and P. Thubert, "Compression Format for IPv6
	Datagrams over IEEE 802.15.4-Based Networks", RFC 6282,		Datagrams over IEEE 802.15.4-Based Networks", RFC 6282,
	September 2011.		DOI 10.17487/RFC6282, September 2011,
			<http://www.rfc-editor.org/info/rfc6282>.
	[6] Thomson, S., Narten, T., and T. Jinmei, "IPv6 Stateless		[6] Thomson, S., Narten, T., and T. Jinmei, "IPv6 Stateless
	Address Autoconfiguration", RFC 4862, September 2007.		Address Autoconfiguration", RFC 4862,
			DOI 10.17487/RFC4862, September 2007,
			<http://www.rfc-editor.org/info/rfc4862>.
	[7] Hinden, R. and S. Deering, "IP Version 6 Addressing		[7] Hinden, R. and S. Deering, "IP Version 6 Addressing
	Architecture", RFC 4291, February 2006.		Architecture", RFC 4291, DOI 10.17487/RFC4291, February
			2006, <http://www.rfc-editor.org/info/rfc4291>.
	[8] Troan, O. and R. Droms, "IPv6 Prefix Options for Dynamic		[8] Troan, O. and R. Droms, "IPv6 Prefix Options for Dynamic
	Host Configuration Protocol (DHCP) version 6", RFC 3633,		Host Configuration Protocol (DHCP) version 6", RFC 3633,
	December 2003.		DOI 10.17487/RFC3633, December 2003,
			<http://www.rfc-editor.org/info/rfc3633>.
	[9] Narten, T., Nordmark, E., Simpson, W., and H. Soliman,		[9] Narten, T., Nordmark, E., Simpson, W., and H. Soliman,
	"Neighbor Discovery for IP version 6 (IPv6)", RFC 4861,		"Neighbor Discovery for IP version 6 (IPv6)", RFC 4861,
	September 2007.		DOI 10.17487/RFC4861, September 2007,
			<http://www.rfc-editor.org/info/rfc4861>.
	[10] Carpenter, B. and S. Jiang, "Significance of IPv6		[10] Carpenter, B. and S. Jiang, "Significance of IPv6
	Interface Identifiers", RFC 7136, February 2014.		Interface Identifiers", RFC 7136, DOI 10.17487/RFC7136,
			February 2014, <http://www.rfc-editor.org/info/rfc7136>.
			[11] Bormann, C., "6LoWPAN-GHC: Generic Header Compression for
			IPv6 over Low-Power Wireless Personal Area Networks
			(6LoWPANs)", RFC 7400, DOI 10.17487/RFC7400, November
			2014, <http://www.rfc-editor.org/info/rfc7400>.
	9.2. Informative References		9.2. Informative References
	[11] "Near Field Communication - Interface and Protocol (NFCIP-		[12] "Near Field Communication - Interface and Protocol (NFCIP-
	1) 3rd Ed.", ECMA-340 , June 2013.		1) 3rd Ed.", ECMA-340 , June 2013.
	Authors' Addresses		Authors' Addresses
	Yong-Geun Hong		Yong-Geun Hong
	ETRI		ETRI
	161 Gajeong-Dong Yuseung-Gu		161 Gajeong-Dong Yuseung-Gu
	Daejeon 305-700		Daejeon 305-700
	Korea		Korea
End of changes. 31 change blocks.
	43 lines changed or deleted		94 lines changed or added
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