CCAMP G. Martinelli, Ed. Internet-Draft M. Kattan Intended status: Standards Track G. Galimberti Expires: August 27, 2013 Cisco A. Zanardi, Ed. CREATE-NET February 23, 2013 Encoding for WSON Information Model with Impairments Validation. draft-martinelli-ccamp-wson-iv-encode-01 Abstract This document defines proper encoding for the Information Model to support Impairment-Aware (IA) Routing and Wavelength Assignment (RWA) function. This operation might be required in Wavelength Switched Optical Networks (WSON) that already support RWA, encoding defined here goes in addition to available WSON encoding and it is fully compatible with it. As the information model, the encoding is independent from control plane architectures and protocol implementations. Its definitions must be reused in related protocol extensions. 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). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet- Drafts is at http://datatracker.ietf.org/drafts/current/. 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. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." This Internet-Draft will expire on August 27, 2013. Copyright Notice Copyright (c) 2013 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Martinelli, et al. Expires August 27, 2013 [Page 1] Internet-Draft Encoding WSON Info Model with Impairments February 2013 Provisions Relating to IETF Documents (http://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. 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 . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1. Requirements Language . . . . . . . . . . . . . . . . . . . 3 2. Encoding . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2.1. Optical Parameter . . . . . . . . . . . . . . . . . . . . . 3 2.2. Impairment Vector . . . . . . . . . . . . . . . . . . . . . 4 2.3. Impairment Matrix . . . . . . . . . . . . . . . . . . . . . 5 3. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 6 4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 6 5. Security Considerations . . . . . . . . . . . . . . . . . . . . 6 6. References . . . . . . . . . . . . . . . . . . . . . . . . . . 6 6.1. Normative References . . . . . . . . . . . . . . . . . . . 6 6.2. Informative References . . . . . . . . . . . . . . . . . . 6 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 7 Martinelli, et al. Expires August 27, 2013 [Page 2] Internet-Draft Encoding WSON Info Model with Impairments February 2013 1. Introduction In case of WSON where optical impairments plays a significant role, the framework document [RFC6566] defines related control plane architectural options for an Impairment Aware routing and wavelength assignment (IA-RWA). This document provides a suitable encoding for the related WSON Impairment Information Model defined [I-D.martinelli-ccamp-wson-iv-info]. This document directly refers to ITU recommendations [ITU.G680] and [ITU.G697] as already detailed in the information model. 1.1. Requirements Language 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]. 2. Encoding 2.1. Optical Parameter The OPTICAL_PARAM is defined as a sub TLV 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 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |S| Reserved | ParamSource | ParamID | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Value | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Variance | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ The following flags are defined: S. Standard bit. With S=1 indentify ITU set of parameters, S=0 identify other set of parameters. With the flag S=1 the following parameters are defined: ParamSource. Where this parameter was defined. Currently only [ITU.G697] has defined this with value 1. ParamID. Parameter identifier according to the source. [ITU.G697] table V.3 defines the following identifiers: Martinelli, et al. Expires August 27, 2013 [Page 3] Internet-Draft Encoding WSON Info Model with Impairments February 2013 1. Total Power (dBm) 2. Channel Power (dBm) 3. Reserved (Defined in [ITU.G697] but not used) 4. Reserved (Defined in [ITU.G697] but not used) 5. OSNR (db) 6. Q Factor (a pure number) 7. PMD (ps) 8. Residual Chromatic Dispersion (ps/nm) Value. Value for the parameter. As defined by [ITU.G697] is a 32 bit IEEE floating point number. Variance. Variance for the parameter, a 32 bit IEEE floating point number. 2.2. Impairment Vector This sub-TLV is a list of optical parameters and they MAY be grouped by wavelength dependency. To This purpose an optional Label Set sub- TLV is added as a first 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 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |W| Reserved | Length | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Label Set | : : +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Optical Param sub-TLV(s) | : | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Where: W. Wavelength Dependency flag. With W=1 there is be a Label Set sub-TLV which details to which set of wavelenghs the list of parameters is applicable. Length, the lenght of this TLV [EDITOR NOTE: may become numbers of parameters? length will be already within TLV header]. Martinelli, et al. Expires August 27, 2013 [Page 4] Internet-Draft Encoding WSON Info Model with Impairments February 2013 The Label Set object is defined in [I-D.ietf-ccamp-general-constraint-encode] Section 2.1. Likely an inclusive range will be the only option required by the Action defined in the Label Set. Optical Param sub-TLV(s) a list of Object as defined in Section 2.1. 2.3. Impairment Matrix As defined by the [I-D.martinelli-ccamp-wson-iv-info] the Impairment Matrix follow the same structure as the Connectivity Matrix. 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 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Connectivity | MatrixID | Reserved |W|N| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Link Set A #1 | : : : +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Link Set B #1 | : : : +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Impairment Vector sub-TLV(s) | : : : +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Additional Link Set pairs and Optical Parameters | : : : +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Where: Connectivity: value MUST be 2 for the Impairment Matrix (Values 0 and 1 are already defined by [I-D.ietf-ccamp-general-constraint-encode]. MatrixID: matrix identifier, the scope of this integer number is shared with [I-D.ietf-ccamp-rwa-info]. N: Node scope flags. With this flag set there's no Link Set information but only a list of optical parameters TLVs that apply to the whole optical node. W: Wavelength Dependency Matrix [EDITOR NOTE: to evaluate vs a the flag at vector/parameter level.]. Martinelli, et al. Expires August 27, 2013 [Page 5] Internet-Draft Encoding WSON Info Model with Impairments February 2013 The usage of multiple matrixes with Connectivity type equal to 2 (Impairment Matrix) MIGHT be used to grup optical parameters by connectivity. For example, if subset of parameters apply to the whole node connectivity, a unique matrix with flag N=1 is used. At the same some other subset of parameters apply only to some LinkSet pairs, a specific Impairment Matrix will be added. 3. Acknowledgements TBD 4. IANA Considerations This document does not contain any IANA request. 5. Security Considerations All drafts are required to have a security considerations section. See RFC 3552 [RFC3552] for a guide. 6. References 6.1. Normative References [ITU.G680] International Telecommunications Union, "Physical transfer functions of optical network elements", ITU- T Recommendation G.680, July 2007. [ITU.G697] International Telecommunications Union, "Optical monitoring for dense wavelength division multiplexing systems", ITU-T Recommendation G.697, February 2012. [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, March 1997. 6.2. Informative References [I-D.ietf-ccamp-general-constraint-encode] Bernstein, G., Lee, Y., Li, D., and W. Imajuku, "General Network Element Constraint Encoding for GMPLS Controlled Networks", draft-ietf-ccamp-general-constraint-encode-08 (work in progress), July 2012. Martinelli, et al. Expires August 27, 2013 [Page 6] Internet-Draft Encoding WSON Info Model with Impairments February 2013 [I-D.ietf-ccamp-rwa-info] Lee, Y., Bernstein, G., Li, D., and W. Imajuku, "Routing and Wavelength Assignment Information Model for Wavelength Switched Optical Networks", draft-ietf-ccamp-rwa-info-14 (work in progress), March 2012. [I-D.martinelli-ccamp-wson-iv-info] Martinelli, G., Kattan, M., Galimberti, G., and A. Zanardi, "Information Model for Wavelength Switched Optical Networks (WSON) with Optical Impairments Validation.", draft-martinelli-ccamp-wson-iv-info-00 (work in progress), July 2012. [I-D.narten-iana-considerations-rfc2434bis] Narten, T. and H. Alvestrand, "Guidelines for Writing an IANA Considerations Section in RFCs", draft-narten-iana-considerations-rfc2434bis-09 (work in progress), March 2008. [RFC3552] Rescorla, E. and B. Korver, "Guidelines for Writing RFC Text on Security Considerations", BCP 72, RFC 3552, July 2003. [RFC6566] Lee, Y., Bernstein, G., Li, D., and G. Martinelli, "A Framework for the Control of Wavelength Switched Optical Networks (WSONs) with Impairments", RFC 6566, March 2012. Authors' Addresses Giovanni Martinelli (editor) Cisco via Philips 12 Monza, 20900 Italy Phone: +39 039 2092044 Email: giomarti@cisco.com Moustafa Kattan Cisco DUBAI, 500321 UNITED ARAB EMIRATES Phone: Email: mkattan@cisco.com Martinelli, et al. Expires August 27, 2013 [Page 7] Internet-Draft Encoding WSON Info Model with Impairments February 2013 Gabriele M. Galimberti Cisco Via Philips,12 Monza 20900 Italy Phone: +39 039 2091462 Email: ggalimbe@cisco.com Andrea Zanardi (editor) CREATE-NET via alla Cascata 56 C, Povo Trento 38100 Italy Email: andrea.zanardi@create-net.org Martinelli, et al. Expires August 27, 2013 [Page 8]