< draft-hussain-ccamp-super-channel-label-03.txt		draft-hussain-ccamp-super-channel-label-04.txt >
	Network Working Group Iftekhar Hussain		Network Working Group Iftekhar Hussain
	Internet Draft Abinder Dhillon		Internet Draft Abinder Dhillon
	Intended status: Standard Track Zhong Pan		Intended status: Standard Track Zhong Pan
	Expires: September 2012 Marco Sosa		Expires: March 2013 Marco Sosa
	Infinera		Infinera
	Bert Basch		Bert Basch
	Steve Liu		Steve Liu
	Andrew G. Malis		Andrew G. Malis
	Verizon Communications		Verizon Communications
	March 11, 2012		September 5, 2012
	Generalized Label for Super-Channel Assignment on Flexible Grid		Generalized Label for Super-Channel Assignment on Flexible Grid
	draft-hussain-ccamp-super-channel-label-03.txt		draft-hussain-ccamp-super-channel-label-04.txt
	Abstract		Abstract
	To enable scaling of existing transport systems to ultra high data		To enable scaling of existing transport systems to ultra high data
	rates of 1 Tbps and beyond, next generation systems providing super-		rates of 1 Tbps and beyond, next generation systems providing super-
	channel switching capability are currently being developed. To allow		channel switching capability are currently being developed. To allow
	efficient allocation of optical spectral bandwidth for such high bit		efficient allocation of optical spectral bandwidth for such high bit
	rate systems, International Telecommunication Union		rate systems, International Telecommunication Union
	Telecommunication Standardization Sector (ITU-T) is extending the		Telecommunication Standardization Sector (ITU-T) is extending the
	G.694.1 grid standard (termed "Fixed-Grid") to include flexible grid		G.694.1 grid standard (termed "Fixed-Grid") to include flexible grid
	skipping to change at page 2, line 18 ¶		skipping to change at page 2, line 18 ¶
	months and may be updated, replaced, or obsoleted by other documents		months and may be updated, replaced, or obsoleted by other documents
	at any time. It is inappropriate to use Internet-Drafts as		at any time. It is inappropriate to use Internet-Drafts as
	reference material or to cite them other than as "work in progress."		reference material or to cite them other than as "work in progress."
	The list of current Internet-Drafts can be accessed at		The list of current Internet-Drafts can be accessed at
	http://www.ietf.org/ietf/1id-abstracts.txt		http://www.ietf.org/ietf/1id-abstracts.txt
	The list of Internet-Draft Shadow Directories can be accessed at		The list of Internet-Draft Shadow Directories can be accessed at
	http://www.ietf.org/shadow.html		http://www.ietf.org/shadow.html
	This Internet-Draft will expire on September 10, 2012.		This Internet-Draft will expire on March 5, 2013.
	Copyright Notice		Copyright Notice
	Copyright (c) 2012 IETF Trust and the persons identified as the		Copyright (c) 2012 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 5, line 8 ¶		skipping to change at page 5, line 8 ¶
	multiple slots. Note that the channel capacity available on a given		multiple slots. Note that the channel capacity available on a given
	number of optical spectral slices depends on (among other factors)		number of optical spectral slices depends on (among other factors)
	how many contiguous optical slots are used. The definition of the		how many contiguous optical slots are used. The definition of the
	channel capacity available for a split-spectrum super-channel split		channel capacity available for a split-spectrum super-channel split
	across multiple slots of different widths is outside the scope of		across multiple slots of different widths is outside the scope of
	this document.		this document.
	ITU-T G.694.1		ITU-T G.694.1
	Center frequency (f) = 193.1 THz		Center frequency (f) = 193.1 THz
	n=-3 n=-2 n=-1 n=0 n=+1 n=+2		n=-3 n=-2 n=-1 n=0 n=+1 n=+2
	^ ^ ^ ^ ^ ^		^ ^ ^ ^ ^ ^
	... | | | | | | ...		... | | | | | | ...
	| | | | | | | | | | |		|| | | | | | | | | |
	+--------+-------+-------+-------+-------+---		+--------+-------+-------+-------+-------+---
	<-- --> <-- -->		<-- --> <-- -->
	50 GHz 50 GHz		50 GHz 50 GHz
	^ ^		^ ^
	| n=-2 | n= +1		| n=-2 | n= +1
	| |		| |
	+------+ +------+		+------+ +------+
	|50 GHz| |50 GHz|		|50 GHz| |50 GHz|
	+------+ +------+		+------+ +------+
	(10 Gbps channel) (40Gbps channel)		(10 Gbps channel) (40Gbps channel)
	(a fixed 50GHz chunk) (a fixed 50GHz chunk)		(a fixed 50GHz chunk) (a fixed 50GHz chunk)
	(a)		(a)
	^ ^ ^ ^ ^ ^		^ ^ ^ ^ ^ ^
	| | | | | + +|		| | | | | ++|
	... |-|-|-|-|-|-|-|-| |+|+|+|+|+|+|+|+|+|1|1| ...		... |-|-|-|-|-|-|-|-| |+|+|+|+|+|+|+|+|+|1|1| ...
	|8|7|6|5|4|3|2|1|0|1|2|3|4|5|6|7|8|9|0|1|		|8|7|6|5|4|3|2|1|0|1|2|3|4|5|6|7|8|9|0|1|
	---+-------+-------+-------+-------+-------+---		---+-------+-------+-------+-------+-------+---
	^ ^ ^		^ ^ ^
	|<-- 200 GHz -->|<- ->|		|<-- 200 GHz -->|<- ->|
	| | 50GHz |		| | 50GHz |
	+-------------------------------+-------+		+-------------------------------+-------+
	| 1 Tbps super-channel |100Gbps|		| 1 Tbps super-channel |100Gbps|
	| 16 slices of 12.5 GHz |Channel|		| 16 slices of 12.5 GHz |Channel|
	| |4slices|		| |4slices|
	+-------------------------------+-------+		+-------------------------------+-------+
	(b)		(b)
	Figure 1 ITU-T (a) 50 GHz fixed-grid (G.694.1) (b) 12.5 GHz granular		Figure 1 ITU-T (a) 50 GHz fixed-grid (G.694.1) (b) 12.5 GHz granular
	skipping to change at page 6, line 45 ¶		skipping to change at page 6, line 45 ¶
	o Wavelength label does not allow signaling of arbitrary flexible-		o Wavelength label does not allow signaling of arbitrary flexible-
	size optical spectrum bandwidth needed for super-channels		size optical spectrum bandwidth needed for super-channels
	assignment on flex-grid.		assignment on flex-grid.
	3.1. Flex-Grid Slice Numbering		3.1. Flex-Grid Slice Numbering
	Given a slice spacing value (e.g., 0.0125 THz) and a slice number		Given a slice spacing value (e.g., 0.0125 THz) and a slice number
	"n", the slice left edge frequency can be calculated as follows:		"n", the slice left edge frequency can be calculated as follows:
	Slice Left Edge Frequency (THz)= 193.1 THz + n*slice spacing (THz).		Slice Left Edge Frequency(THz)= 193.1 THz + n*slice spacing (THz).
	Where "n" is a two's-complement integer (i.e., positive, negative,		Where "n" is a two's-complement integer (i.e., positive, negative,
	or 0) and "slice spacing" is 0.0125 THz conforming to ITU-T Flex-		or 0) and "slice spacing" is 0.0125 THz conforming to ITU-T Flex-
	Grid. (Editor's Note: in the future, if necessary the slice		Grid.(Editor's Note: in the future, if necessary the slice numbering
	numbering scheme will be updated in accordance with the Flex-Grid.)		scheme will be updated in accordance with the Flex-Grid.)
	Figure 2 shows an example using the slice number scheme described		Figure 2 shows an example using the slice number scheme described
	earlier.		earlier.
	3.2. Super-Channel Label		3.2. Super-Channel Label
	In order to setup an optical path manually or dynamically, we need a		In order to setup an optical path manually or dynamically, we need a
	way to identify and reserve resources (i.e., signal optical spectral		way to identify and reserve resources (i.e., signal optical spectral
	bandwidth for the super-channels) along the optical path. For this		bandwidth for the super-channels) along the optical path. For this
	purpose, this document defines a super-channel label to cover the		purpose, this document defines a super-channel label to cover the
	cases of split-spectrum super-channels as well, such that the label		cases of split-spectrum super-channels as well, such that the label
	consists of a Super-Channel Identifier and an associated list of		consists of a Super-Channel Identifier and an associated list of
	contiguous or non-contiguous set of 12.5 GHz slices representing		contiguous or non-contiguous set of 12.5 GHz slices representing
	arbitrary size optical spectrum of the super-channels (Note: in the		arbitrary size optical spectrum of the super-channels (Note: in the
	future, slice granularity could be 6.25 GHz.)		future, slice granularity could be 6.25 GHz.)
	(n=0 is 193.1 THz)		(n=0 is 193.1 THz)
	n=-2 n=-1 n=0 n=+1 n=+2		n=-2 n=-1 n=0 n=+1 n=+2
	^ ^ ^ ^ ^		^ ^ ^ ^ ^
	| | | | |		| | | | |
	... |-|-|-|-|-|-|-|-| |+|+|+|+|+|+|+| ...		... |-|-|-|-|-|-|-|-| |+|+|+|+|+|+|+| ...
	|8|7|6|5|4|3|2|1|0|1|2|3|4|5|6|7|		|8|7|6|5|4|3|2|1|0|1|2|3|4|5|6|7|
	---+-------+-------+-------+-------+---		---+-------+-------+-------+-------+---
	^ ^		^ ^
	| |		| |
	| |		| |
	+-----------------------+		+-----------------------+
	skipping to change at page 8, line 5 ¶		skipping to change at page 8, line 5 ¶
	| |		| |
	| n_start= -7 |		| n_start= -7 |
	| n_end = +4 |		| n_end = +4 |
	| |		| |
	| (see label encoding |		| (see label encoding |
	| format for details) |		| format for details) |
	+-----------------------+		+-----------------------+
	Figure 2 flex-grid example of the proposed slice numbering scheme.		Figure 2 flex-grid example of the proposed slice numbering scheme.
	3.2.1. Super-Channel Label Encoding Format		3.2.1. Super-Channel Label Encoding Format
	This section describes two options (option A and B) for encoding the		This section describes two options (option A and B) for encoding the
	super-channel label by making extensions to the waveband switching		super-channel label by making extensions to the waveband switching
	label[RFC3471] and wavelength label [RFC6205] formats.		label[RFC3471] and wavelength label[RFC6205] formats.
	o Option A: Encode super-channel label as a list of start and end		o Option A: Encode super-channel label as a list of start and end
	slice numbers corresponding to N slots, each consisting of		slice numbers corresponding to N slots, each consisting of
	contiguous slices with each slot denoted by its starting and		contiguous slices with each slot denoted by its starting and
	ending slice number (e.g., "n_start_1" and "n_end_1" represent		ending slice number (e.g., "n_start_1" and "n_end_1" represent
	contiguous slices in slot#1, "n_start 2" and "n_end 2" in slot#2,		contiguous slices in slot#1, "n_start 2" and "n_end 2" in slot#2,
	..., "n_start N" and "n_end N" in slot#N).		..., "n_start N" and "n_end N" in slot#N).
	0 1 2 3		0 1 2 3
	0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1		0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	| Super-Channel Id (16-bit) |Grid | S.S. | Reserved (9-bit)|		| Super-Channel Id(16-bit) |Grid | S.S. | Reserved (9-bit)|
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	| Reserved (16-bit) | Number of Entries(16-bit) |		| Reserved (16-bit) | Number of Entries(16-bit) |
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	|n_start_1(contiguous slot #1) | n_end_1(contiguous slot #1) |		|n_start_1(contiguous slot #1) | n_end_1(contiguous slot #1) |
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	|n_start_2(contiguous slot #2) | n_end_2(contiguous slot #2) |		|n_start_2(contiguous slot#2) | n_end_2(contiguous slot#2) |
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	| |		| |
	| ... |		| ... |
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	|n_start_N (contiguous slot #N) | n_end_N (contiguous slot #N |		|n_start_N (contiguous slot#N) | n_end_N (contiguous slot #N |
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	Super-Channel Id: 16 bits		Super-Channel Id: 16 bits
	This field represents a logical identifier for a super-channel or		This field represents a logical identifier for a super-channel or
	split-spectrum super-channel. To disambiguate waveband switching		split-spectrum super-channel. To disambiguate waveband switching
	and super-channel label applications, we propose to rename the		and super-channel label applications, we propose to rename the
	Waveband Identifier (32-bit) as a Super-Channel Identifier (16-		Waveband Identifier (32-bit) as a Super-Channel Identifier (16-
	bit).		bit).
	skipping to change at page 9, line 21 ¶		skipping to change at page 9, line 21 ¶
	|Future use | 3 - 7 |		|Future use | 3 - 7 |
	+----------------+---------+		+----------------+---------+
	S.S. (slice spacing): 4 bits		S.S. (slice spacing): 4 bits
	This field should be set to a value of 4 to indicate 12.5 GHz in		This field should be set to a value of 4 to indicate 12.5 GHz in
	both labels.		both labels.
	+----------+---------+		+----------+---------+
	|S.S. (GHz)| Value |		|S.S. (GHz)| Value |
	+----------+---------+		+----------+---------+
	| Reserved | 0 |		| Reserved | 0 |
	+----------+---------+		+----------+---------+
	| 100 | 1 |		| 100 | 1 |
	+----------+---------+		+----------+---------+
	| 50 | 2 |		| 50 | 2 |
	+----------+---------+		+----------+---------+
	| 25 | 3 |		| 25 | 3 |
	+----------+---------+		+----------+---------+
	| 12.5 | 4 |		| 12.5 | 4 |
	+----------+---------+		+----------+---------+
	skipping to change at page 10, line 19 ¶		skipping to change at page 10, line 19 ¶
	o Option B: Encode super-channel label as a first slice number of		o Option B: Encode super-channel label as a first slice number of
	the grid (denoted as "n_start of Grid") plus the entire list of		the grid (denoted as "n_start of Grid") plus the entire list of
	slices in the grid as a Bitmap		slices in the grid as a Bitmap
	0 1 2 3		0 1 2 3
	0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1		0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	| Super-Channel Id (16-bit) |Grid | S.S. | Reserved (9-bit)|		| Super-Channel Id (16-bit) |Grid | S.S. | Reserved (9-bit)|
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	| n_start of Grid (16-bit) |Num of Slices in Grid (16-bit) |		|n_start of Grid (16-bit) |Num of Slices in Grid (16-bit) |
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	|Bitmap Word #1(first set of 32 slices from the left most edge) |		|Bitmap Word #1(first set of 32 slices from the left most edge) |
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	|Bitmap Word #2 (next set of 32 contiguous slice numbers) |		|Bitmap Word #2 (next set of 32 contiguous slice numbers) |
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	| |		| |
	...		...
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	|Bitmap Word #N(last set of 32 contiguous slice numbers) |		|Bitmap Word #N(last set of 32 contiguous slice numbers) |
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	Where:		Where:
	Super-Channel Id, Grid, and S.S fields are same as described		Super-Channel Id, Grid, and S.S fields are same as described
	earlier in option A.		earlier in option A.
	n_start of Grid: 16-bit		n_start of Grid: 16-bit
	This field indicates the first slice number in Grid for the		This field indicates the first slice number in Grid for the
	band being referenced (i.e., the start of the left most edge of		band being referenced (i.e., the start of the left most edge of
	the Grid).		the Grid).
	Num of Slices in Grid: 16-bit		Numof Slices in Grid: 16-bit
	This field represents the total number of slices in the band.		This field represents the total number of slices in the band.
	The value in this field determines the number of 32-bitmap words		The value in this field determines the number of 32-bitmap words
	required for the grid.		required for the grid.
	Bit map (Word): 32-bit		Bit map (Word): 32-bit
	Each bit in the 32-bitmap word represents a particular slice		Each bit in the 32-bitmap word represents a particular slice
	with a value of 1 or 0 to indicate whether for that slice		with a value of 1 or 0 to indicate whether for that slice
	reservation is required (1) or not (0). Bit position zero in		reservation is required (1) or not (0). Bit position zero in
	the first word represents the first slice in the band (Grid)		the first word represents the first slice in the band (Grid)
	skipping to change at page 11, line 28 ¶		skipping to change at page 11, line 28 ¶
	however, might be less flexible in encoding split-spectrum super-		however, might be less flexible in encoding split-spectrum super-
	channels with arbitrary non-contiguous set of slices.		channels with arbitrary non-contiguous set of slices.
	3.2.2. LSP Encoding Type, Switching Type, and Generalized-PID (G-PID)		3.2.2. LSP Encoding Type, Switching Type, and Generalized-PID (G-PID)
	in Generalized Label Request		in Generalized Label Request
	For requesting a super-channel label in a Generalized Label Request		For requesting a super-channel label in a Generalized Label Request
	defined in section 3.1.1 of RFC3471, this document proposes to use		defined in section 3.1.1 of RFC3471, this document proposes to use
	LSP Encoding Type = Lambda (as defined in RFC4328), Switching Type =		LSP Encoding Type = Lambda (as defined in RFC4328), Switching Type =
	Super-Channel-Switch-Capable(SCSC) (as defined in [6]), and a new G-		Super-Channel-Switch-Capable(SCSC) (as defined in [6]), and a new G-
	PID type = OTUadapt and a new G-PID value (similar to as defined in		PID type = OTUadaptand a new G-PID value (similar to as defined in
	section 3.1.3 of RFC4328) to be assigned by IANA.		section 3.1.3 of RFC4328) to be assigned by IANA.
	4. Security Considerations		4. Security Considerations
	<Add any security considerations>		<Add any security considerations>
	5. IANA Considerations		5. IANA Considerations
	IANA needs to assign a new Grid field value to represent ITU-T Flex-		IANA needs to assign a new Grid field value to represent ITU-T Flex-
	Grid and a new G-PID value.		Grid and a new G-PID value.
	6. References		6. References
	6.1. Normative References		6.1. Normative References
	[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate		[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
	Requirement Levels", BCP 14, RFC 2119, March 1997.		Requirement Levels", BCP 14, RFC 2119, March 1997.
	[RFC3471] Berger, L., Ed., "Generalized Multi-Protocol Label		[RFC3471] Berger, L., Ed., "Generalized Multi-Protocol Label
	Switching (GMPLS) Signaling Functional Description", RFC		Switching (GMPLS) Signaling Functional Description", RFC
	3471, January 2003.		3471, January 2003.
	[RFC6205] Otani, T., Ed., "Generalized Labels for Lambda-Switch-		[RFC6205] Otani, T., Ed., "Generalized Labels for Lambda-Switch-
	Capable (LSC) Label Switching Routers", RFC 6205, March		Capable (LSC) Label Switching Routers", RFC 6205, March
	2011.		2011.
	[RFC6163] Lee, Y., Ed., "Framework for GMPLS and Path Computation		[RFC6163] Lee, Y., Ed., "Framework for GMPLS and Path Computation
	Element (PCE) Control of Wavelength Switched Optical		Element (PCE) Control of Wavelength Switched Optical
	Networks (WSONs)", RFC 6163, April 2011		Networks (WSONs)", RFC 6163, April 2011
	6.2. Informative References		6.2. Informative References
	[1] Gringeri, S., Basch, B. Shukla,V. Egorov, R. and Tiejun J.		[1] Gringeri, S., Basch, B. Shukla,V. Egorov, R. and Tiejun J.
	Xia, "Flexible Architectures for Optical Transport Nodes and		Xia, "Flexible Architectures for Optical Transport Nodes and
	Networks", IEEE Communications Magazine, July 2010, pp. 40-50		Networks", IEEE Communications Magazine, July 2010, pp. 40-50
	[2] M. Jinno et. al., "Spectrum-Efficient and Scalable Elastic		[2] M. Jinnoet. al., "Spectrum-Efficient and Scalable Elastic
	Optical Path Network: Architecture, Benefits and Enabling		Optical Path Network: Architecture, Benefits and Enabling
	Technologies", IEEE Comm. Mag., Nov. 2009, pp. 66-73.		Technologies", IEEE Comm. Mag., Nov. 2009, pp. 66-73.
	[3] S. Chandrasekhar and X. Liu, "Terabit Super-Channels for High		[3] S. Chandrasekhar and X. Liu, "Terabit Super-Channels for High
	Spectral Efficiency Transmission",in Proc. ECOC 2010, paper		Spectral Efficiency Transmission",in Proc. ECOC 2010, paper
	Tu.3.C.5, Torino (Italy), September 2010.		Tu.3.C.5, Torino (Italy), September 2010.
	[4] ITU-T Recommendation G.694.1, "Spectral grids for WDM		[4] ITU-T Recommendation G.694.1, "Spectral grids for WDM
	applications: DWDM frequency grid", June 2002		applications: DWDM frequency grid", June 2002
	skipping to change at page 13, line 25 ¶		skipping to change at page 13, line 25 ¶
	and ending at slice number -115).		and ending at slice number -115).
	Node A signals the LSP via a Path message including a super-channel		Node A signals the LSP via a Path message including a super-channel
	label format encoding option A defined in section 3.3:		label format encoding option A defined in section 3.3:
	0 1 2 3		0 1 2 3
	0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1		0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	| Super-Channel Id (16-bit) |Grid | S.S. | Reserved (9-bit)|		| Super-Channel Id (16-bit) |Grid | S.S. | Reserved (9-bit)|
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	| Reserved (16-bit) | Number of Entries(16-bit) |		| Reserved (16-bit) | Number of Entries (16-bit) |
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	|n_start_1 (contiguous slot #1)| n_end_1(contiguous slot #1) |		|n_start_1 (contiguous slot #1) | n_end_1(contiguous slot#1) |
	+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+		+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
	Where:		Where:
	Super-Channel Id = 1 : super-channel number 1		Super-Channel Id = 1 :super-channel number 1
	Number of Entries: 1		Number of Entries: 1
	Grid = xx : ITU-T Flex-Grid		Grid = xx : ITU-T Flex-Grid
	S.S. = 4 : 12.5 GHz Slice Spacing		S.S. = 4 : 12.5 GHz Slice Spacing
	n_start_1 = -130 : left-most 12.5 GHz slice number for slot 1		n_start_1 = -130 : left-most 12.5 GHz slice number for slot 1
	n_end_1 = -115 : Right-most 12.5 GHz slice number for slot 1		n_end_1= -115 : Right-most 12.5 GHz slice number for slot 1
	Authors' Addresses		Authors' Addresses
	Iftekhar Hussain		Iftekhar Hussain
	Infinera		Infinera
	140 Caspian Ct., Sunnyvale, CA 94089		140 Caspian Ct., Sunnyvale, CA 94089
	Email: ihussain@infinera.com		Email: ihussain@infinera.com
	Abinder Dhillon		Abinder Dhillon
	skipping to change at page 14, line 31 ¶		skipping to change at page 14, line 31 ¶
	140 Caspian Ct., Sunnyvale, CA 94089		140 Caspian Ct., Sunnyvale, CA 94089
	Email: zpan@infinera.com		Email: zpan@infinera.com
	Marco Sosa		Marco Sosa
	Infinera		Infinera
	140 Caspian Ct., Sunnyvale, CA 94089		140 Caspian Ct., Sunnyvale, CA 94089
	Email: msosa@infinera.com		Email: msosa@infinera.com
	Bert Basch		BertBasch
	Verizon Communications		Verizon Communications
	60 Sylvan Rd., Waltham, MA 02451		60Sylvan Rd., Waltham, MA02451
	Email: bert.e.basch@verizon.com		Email: bert.e.basch@verizon.com
	Steve Liu		SteveLiu
	Verizon Communications		Verizon Communications
	60 Sylvan Rd., Waltham, MA 02451		60Sylvan Rd., Waltham, MA02451
	Email: steve.liu@verizon.com		Email: steve.liu@verizon.com
	Andrew G. Malis		Andrew G. Malis
	Verizon Communications		Verizon Communications
	60 Sylvan Rd., Waltham, MA 02451		60Sylvan Rd., Waltham, MA02451
	Email: andrew.g.malis@verizon.com		Email: andrew.g.malis@verizon.com
	Contributor's Addresses		Contributor's Addresses
	Rajan Rao		Rajan Rao
	Infinera		Infinera
	140 Caspian Ct., Sunnyvale, CA 94089		140 Caspian Ct., Sunnyvale, CA 94089
	Email: rrao@infinera.com		Email: rrao@infinera.com
End of changes. 41 change blocks.
	45 lines changed or deleted		45 lines changed or added
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