Network Working Group Iftekhar Hussain Internet Draft Vinayak Dangui Intended status: Standard Track Michael VanLeeuwen Expires: April 2014 Marco Sosa Infinera October 8, 2013 Super-Channel Optical Parameters GMPLS Signaling Extensions draft-hussain-ccamp-super-channel-param-sig-03.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. 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), its areas, and its working groups. Note that other groups may also distribute working documents as Internet- Drafts. 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. 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Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. 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................................................8 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]. Hussain Expires April 2014 [Page 2] Internet-Draft Super-Channel Parameters Signaling Extensions October 2013 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] Hussain Expires April 2014 [Page 3] Internet-Draft Super-Channel Parameters Signaling Extensions October 2013 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. Hussain Expires April 2014 [Page 4] Internet-Draft Super-Channel Parameters Signaling Extensions October 2013 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 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | 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. Hussain Expires April 2014 [Page 5] Internet-Draft Super-Channel Parameters Signaling Extensions October 2013 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 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. Hussain Expires April 2014 [Page 6] Internet-Draft Super-Channel Parameters Signaling Extensions October 2013 [RFC6205] Otani, T., Ed., "Generalized Labels for Lambda-Switch- Capable (LSC) Label Switching Routers", RFC 6205, March 2011. [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. Hussain Expires April 2014 [Page 7] Internet-Draft Super-Channel Parameters Signaling Extensions October 2013 9. Acknowledgments Hussain Expires April 2014 [Page 8] Internet-Draft Super-Channel Parameters Signaling Extensions October 2013 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 Hussain Expires April 2014 [Page 9] Internet-Draft Super-Channel Parameters Signaling Extensions October 2013 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 Hussain Expires April 2014 [Page 10]