Super-Channel Optical Parameters GMPLS Signaling Extensions
draft-hussain-ccamp-super-channel-param-sig-00
The information below is for an old version of the document.
| Document | Type |
This is an older version of an Internet-Draft whose latest revision state is "Expired".
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|---|---|---|---|
| Authors | Iftekhar Hussain , Vinayak Dangui, Michael VanLeeuwen, Marco E. Sosa | ||
| Last updated | 2012-03-03 | ||
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draft-hussain-ccamp-super-channel-param-sig-00
Network Working Group Iftekhar Hussain
Internet Draft Vinayak Dangui
Intended status: Standard Track Michael VanLeeuwen
Expires: September 2012 Marco Sosa
Infinera
March 3, 2012
Super-Channel Optical Parameters GMPLS Signaling Extensions
draft-hussain-ccamp-super-channel-param-sig-00.txt
Abstract
This document builds on [6][7] and defines GMPLS signaling
extensions to carry super-channel optical parameters for efficient
spectrum assignment on flexible grid networks.
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This Internet-Draft will expire on September 30, 2012.
Copyright Notice
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Table of Contents
1. Introduction...................................................2
2. Terminology....................................................3
3. GMPLS Signaling Extensions for Super-Channel Optical Parameters3
3.1. Option 1: Encode Super-Channel Optical Parameters in the
RSVP FLOWSPEC or TSPEC Object..................................4
3.2. Option 2: Encode the Aforementioned Information along with
the Super-Channel Label........................................6
4. Procedure for Signaling Super-Channel Optical Parameters.......6
5. TLV Encoding Examples..........................................6
6. Security Considerations........................................6
7. IANA Considerations............................................6
8. References.....................................................6
8.1. Normative References......................................6
8.2. Informative References....................................7
9. Acknowledgments................................................7
1. Introduction
Future transport systems are expected to support service upgrades to
data rates of 1 Tbps and beyond. To scale networks beyond 100Gbps,
multi-carrier super-channels coupled with advanced multi-level
modulation formats and flexible channel spectrum bandwidth
allocation schemes have become pivotal for future spectral efficient
transport network architectures [1,2].
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The coexistence of super-channels using different modulation formats
on the same optical fiber network infrastructure may have a
detrimental effect on the Optical Signal to Noise Ratio (OSNR) of
adjacent super-channels due to interference such as cross-phase
modulation. Therefore, it may be highly desirable to be able to
evaluate the mutual impact of the existing and new super-channels on
each other's quality of transmission (e.g., bit error rate) before
establishing new super-channels.
This document defines GMPLS signaling extensions to convey super-
channel optical parameters such as number of carriers, each
carrier's center frequency, modulation, and FEC type in the RSVP
message. This allows nodes along the super-channel path to learn the
aforementioned super-channel optical characteristics and in turn
advertise this information to other nodes in the network using GMPLS
routing extensions defined in [9].
2. Terminology
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL
NOT","SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in
this document are to be interpreted as described in RFC 2119
[RFC2119].
3. GMPLS Signaling Extensions for Super-Channel Optical Parameters
This document defines extensions for signaling super-channel optical
parameters including:
o Number of Carriers
o Carrier Center Frequency (THz)
o Carrier Modulation
o Carrier Baudrate (Gbit/s)
o Carrier FEC Type
This document defines two options for encoding this information.
[Editor's note: to allow full flexibility we have included two
encoding options]
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3.1. Option 1: Encode Super-Channel Optical Parameters in the RSVP
FLOWSPEC or TSPEC Object
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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| TLV Type | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Number of Carriers | Reserved |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| ~
~ ~
~ One or more Carrier sub-TLVs ~
~ |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 1: Super-Channel Carriers TLV Format
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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| TLV Type | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| ~
~ ~
~ Zero or more Carrier sub-sub-TLVs ~
~ |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 2: Carrier sub-TLV Format.
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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|S|I| TLV Type | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Center Frequency (THz) | Reserved |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 3: Carrier Center Frequency sub-sub-TLV.
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
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|S|I| TLV Type | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Modulation ID | Baudrate (Gbit/s) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| ~
~ Possible additional modulation parameters ~
~ |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 4: Carrier Modulation sub-sub-TLV.
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
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|S|I| TLV Type | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| FEC ID | Reserved |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| ~
~ Possible additional FEC ID parameters ~
~ |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Figure 5: Carrier FEC sub-sub-TLV.
Where:
o When the S bit in a TLV is set to 1 it indicates that the TLV
contains standardized fields (e.g., Modulation, FEC Type) and
when the S bit is set to 0 in a TLV it indicates a vendor
specific TLV (see [8])
o Modulation ID, FEC ID, and I fields are similar to as defined in
[8]
o The Length field in the super-channel Carriers TLV specifies the
length in octets of the complete set of TLVs including the set of
sub-TLVs that follow.
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3.2. Option 2: Encode the Aforementioned Information along with the
Super-Channel Label
For example use Super-Channel Label defined in [7] to also encode
Super-Channel Carriers TLV, the Carrier sub-TLVs, and the associated
set of sub-sub-TLVs defined in the previous section.
4. Procedure for Signaling Super-Channel Optical Parameters
o The optical parameters of the super-channel are signaled in the
RSVP message using encoding option 1 (or option 2).
o During a new super-channel establishment, each node along the new
super-channel setup path allocates the required number of slices
and also learns the associated set of signaled super-channel
optical parameters.
5. TLV Encoding Examples
To be added later.
6. Security Considerations
<Add any security considerations>
7. IANA Considerations
IANA needs to assign a new Grid field value to represent ITU-T Flex-
Grid.
8. References
8.1. Normative References
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997.
[RFC3471] Berger, L., Ed., "Generalized Multi-Protocol Label
Switching (GMPLS) Signaling Functional Description", RFC
3471, January 2003.
[RFC6205] Otani, T., Ed., "Generalized Labels for Lambda-Switch-
Capable (LSC) Label Switching Routers", RFC 6205, March
2011.
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[RFC6163] Lee, Y., Ed., "Framework for GMPLS and Path Computation
Element (PCE) Control of Wavelength Switched Optical
Networks (WSONs)", RFC 6163, April 2011
8.2. Informative References
[1] Gringeri, S., Basch, B. Shukla,V. Egorov, R. and Tiejun J.
Xia, "Flexible Architectures for Optical Transport Nodes and
Networks", IEEE Communications Magazine, July 2010, pp. 40-50
[2] M. Jinno et. al., "Spectrum-Efficient and Scalable Elastic
Optical Path Network: Architecture, Benefits and Enabling
Technologies", IEEE Comm. Mag., Nov. 2009, pp. 66-73.
[3] S. Chandrasekhar and X. Liu, "Terabit Super-Channels for High
Spectral Efficiency Transmission",in Proc. ECOC 2010, paper
Tu.3.C.5, Torino (Italy), September 2010.
[4] ITU-T Recommendation G.694.1, "Spectral grids for WDM
applications: DWDM frequency grid", June 2002
[5] [4] "Finisar to Demonstrate Flexgrid(TM) WSS Technology at
ECOC 2010", press release.
[6] Abinder D., et.al., "OSPFTE extension to support GMPLS for
Flex Grid", draft-dhillon-ccamp-super-channel-ospfte-ext, work
in progress, work in progress, November 2011.
[7] Iftekhar H., et.al., "Generalized Label for Super-Channel
Assignment on Flexible Grid", draft-hussain-ccamp-super-
channel-label, work in progress, October 2011.
[8] G. Bernstein, et.al., "Routing and Wavelength Assignment
Information Encoding for Wavelength Switched Optical
Networks", draft-ietf-ccamp-rwa-wson-encode, work in progress,
October 2011.
[9] Iftekhar H., et.al., "Super-Channel Optical Parameters GMPLS
Routing Extensions", draft-hussain-ccamp-super-channel-param-
ospfte, work in progress, March 2012.
9. Acknowledgments
<Add any acknowledgements>
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Authors' Addresses
Iftekhar Hussain
Infinera
140 Caspian Ct., Sunnyvale, CA 94089
Email: ihussain@infinera.com
Vinayak Dangui
Infinera
140 Caspian Ct., Sunnyvale, CA 94089
Email: vdangui@infinera.com
Michael VanLeeuwen
Infinera
140 Caspian Ct., Sunnyvale, CA 94089
Email: MVanleeuwen@infinera.com
Marco Sosa
Infinera
140 Caspian Ct., Sunnyvale, CA 94089
Email: msosa@infinera.com
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Contributor's Addresses
Abinder Dhillon
Infinera
140 Caspian Ct., Sunnyvale, CA 94089
Email: adhillon@infinera.com
Rajan Rao
Infinera
140 Caspian Ct., Sunnyvale, CA 94089
Email: rrao@infinera.com
Biao Lu
Infinera
140 Caspian Ct., Sunnyvale, CA 94089
Email: blu@infinera.com
Subhendu Chattopadhyay
Infinera
140 Caspian Ct., Sunnyvale, CA 94089
Email: schattopadhyay@infinera.com
Harpreet Uppal
Infinera
140 Caspian Ct., Sunnyvale, CA 94089
Email: harpreet.uppal@infinera.com
Zhong Pan
Infinera
140 Caspian Ct., Sunnyvale, CA 94089
Email: zpan@infinera.com
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