1、 I n t e r n a t i o n a l T e l e c o m m u n i c a t i o n U n i o n ITU-T G.959.1 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (04/2016) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Digital sections and digital line system Digital line systems Optical transport networ
2、k physical layer interfaces Recommendation ITU-T G.959.1 ITU-T G-SERIES RECOMMENDATIONS TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS INTERNATIONAL TELEPHONE CONNECTIONS AND CIRCUITS G.100G.199 GENERAL CHARACTERISTICS COMMON TO ALL ANALOGUE CARRIER-TRANSMISSION SYSTEMS G.200G.299 INDI
3、VIDUAL CHARACTERISTICS OF INTERNATIONAL CARRIER TELEPHONE SYSTEMS ON METALLIC LINES G.300G.399 GENERAL CHARACTERISTICS OF INTERNATIONAL CARRIER TELEPHONE SYSTEMS ON RADIO-RELAY OR SATELLITE LINKS AND INTERCONNECTION WITH METALLIC LINES G.400G.449 COORDINATION OF RADIOTELEPHONY AND LINE TELEPHONY G.4
4、50G.499 TRANSMISSION MEDIA AND OPTICAL SYSTEMS CHARACTERISTICS G.600G.699 DIGITAL TERMINAL EQUIPMENTS G.700G.799 DIGITAL NETWORKS G.800G.899 DIGITAL SECTIONS AND DIGITAL LINE SYSTEM G.900G.999 General G.900G.909 Parameters for optical fibre cable systems G.910G.919 Digital sections at hierarchical b
5、it rates based on a bit rate of 2048 kbit/s G.920G.929 Digital line transmission systems on cable at non-hierarchical bit rates G.930G.939 Digital line systems provided by FDM transmission bearers G.940G.949 Digital line systems G.950G.959 Digital section and digital transmission systems for custome
6、r access to ISDN G.960G.969 Optical fibre submarine cable systems G.970G.979 Optical line systems for local and access networks G.980G.989 Metallic access networks G.990G.999 MULTIMEDIA QUALITY OF SERVICE AND PERFORMANCE GENERIC AND USER-RELATED ASPECTS G.1000G.1999 TRANSMISSION MEDIA CHARACTERISTIC
7、S G.6000G.6999 DATA OVER TRANSPORT GENERIC ASPECTS G.7000G.7999 PACKET OVER TRANSPORT ASPECTS G.8000G.8999 ACCESS NETWORKS G.9000G.9999 For further details, please refer to the list of ITU-T Recommendations. Rec. ITU-T G.959.1 (04/2016) i Recommendation ITU-T G.959.1 Optical transport network physic
8、al layer interfaces Summary Recommendation ITU-T G.959.1 provides physical layer inter-domain interface (IrDI) specifications for optical networks which may employ wavelength division multiplexing (WDM). The IrDIs within the optical transport network (OTN) are provided by unidirectional, point-to-po
9、int, single and multichannel line systems. Their primary purpose is to enable transversely compatible interfaces to span the boundary between two administrative domains. The IrDI specifications include intra-office, short-haul and long-haul applications, without line amplifiers. This version of this
10、 Recommendation includes single-channel interfaces up to OTU3 (40 Gbit/s) rate and multichannel interfaces suitable for OTL4.4 (OTU4 striped across four physical lanes). History Edition Recommendation Approval Study Group Unique ID* 1.0 ITU-T G.959.1 2001-02-09 15 11.1002/1000/5362 2.0 ITU-T G.959.1
11、 2003-12-14 15 11.1002/1000/7067 3.0 ITU-T G.959.1 2006-03-29 15 11.1002/1000/8758 4.0 ITU-T G.959.1 2008-03-29 15 11.1002/1000/9377 5.0 ITU-T G.959.1 2009-11-13 15 11.1002/1000/10403 5.1 ITU-T G.959.1 (2009) Amd. 1 2011-04-13 15 11.1002/1000/11122 6.0 ITU-T G.959.1 2012-02-13 15 11.1002/1000/11494
12、7.0 ITU-T G.959.1 2016-04-13 15 11.1002/1000/12793 Keywords Optical, physical layer, OTN, non-OTN, IrDI, single channel, multichannel, WDM, intra-office, short-haul, long-haul, transversely compatible, application codes. * To access the Recommendation, type the URL http:/handle.itu.int/ in the addre
13、ss field of your web browser, followed by the Recommendations unique ID. For example, http:/handle.itu.int/11.1002/1000/11830-en. ii Rec. ITU-T G.959.1 (04/2016) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications, info
14、rmation and communication technologies (ICTs). The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a wo
15、rldwide basis. The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by the procedure laid down in
16、 WTSA Resolution 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with ISO and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication admi
17、nistration and a recognized operating agency. Compliance with this Recommendation is voluntary. However, the Recommendation may contain certain mandatory provisions (to ensure, e.g., interoperability or applicability) and compliance with the Recommendation is achieved when all of these mandatory pro
18、visions are met. The words “shall“ or some other obligatory language such as “must“ and the negative equivalents are used to express requirements. The use of such words does not suggest that compliance with the Recommendation is required of any party. INTELLECTUAL PROPERTY RIGHTSITU draws attention
19、to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outs
20、ide of the Recommendation development process. As of the date of approval of this Recommendation, ITU had received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementers are cautioned that this may not represent the latest
21、 information and are therefore strongly urged to consult the TSB patent database at http:/www.itu.int/ITU-T/ipr/. ITU 2016 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. Rec. ITU-T G.959.1 (04/2016) iii Table
22、of Contents Page 1 Scope . 1 2 References . 1 3 Terms and definitions . 2 3.1 Terms defined elsewhere 2 3.2 Terms defined in this Recommendation . 3 4 Abbreviations and acronyms 3 5 Classification of optical interfaces 5 5.1 Applications 5 5.2 Reference points . 6 5.3 Nomenclature . 6 5.4 Multichann
23、el inter-domain interfaces . 8 5.5 Single-channel inter-domain interfaces 11 5.6 Management signal implementations . 15 6 Transverse compatibility 16 7 Parameter definitions 16 7.1 System operating wavelength range . 16 7.2 Parameters 16 8 Parameter values . 28 8.1 Multichannel IrDI . 28 8.2 Single-
24、channel IrDI 37 9 Optical safety considerations 53 10 Power level management 53 Annex A Configuration for method A for assessment of single-channel characteristics in a multichannel IrDI . 54 A.1 Reference configuration . 54 Annex B Reference optical bandpass filter and reference receiver characteri
25、stics for method B, for assessment of single-channel characteristics in a multichannel IrDI 55 B.1 Reference configuration . 55 B.2 Reference optical bandpass filter 55 B.3 Reference receiver 56 Appendix I Single-channel client interfaces with 3R regeneration 57 I.1 Introduction 57 I.2 Description o
26、f client signal interfaces with 3R regeneration . 57 Appendix II Generic reference points within the OTN . 58 Appendix III Clarification of use of reference points within IrDI and IaDI . 60 Appendix IV Considerations for management signal implementations . 61 IV.1 Optical tributary signal management
27、 signal implementation . 61 iv Rec. ITU-T G.959.1 (04/2016) Page IV.2 Optical multiplex section and optical transmission section management signal implementation 61 Appendix V Nomenclature for the highest class of optical tributary signal supported 62 Appendix VI Optical tributary signal class RZ 40
28、G applications 63 Appendix VII Applications using electronic dispersion compensation 65 Bibliography. 67 Rec. ITU-T G.959.1 (04/2016) 1 Recommendation ITU-T G.959.1 Optical transport network physical layer interfaces 1 Scope This Recommendation provides physical layer inter-domain interface (IrDI) s
29、pecifications for optical networks that may employ wavelength division multiplexing (WDM). These interfaces may also be employed, where appropriate, as intra-domain interfaces (IaDI). The physical layer specifications are valid for non-optical transport network (non-OTN) IrDIs, while also allowing a
30、pplication on OTN IrDIs according to ITU-T G.709. In the case of a non-OTN IrDI, OTN management capabilities are not required. The IrDIs within the optical transport network (OTN) are provided by unidirectional, point-to-point, single and multichannel line systems. Their primary purpose is to enable
31、 transversely compatible interfaces to span the boundary between two administrative domains. The IrDI specifications include intra-office, short-haul and long-haul applications, without line amplifiers. NOTE For the purposes of this Recommendation, the term “administrative domain“ is understood to m
32、ean the extent of resources that belong to a single player, such as a network operator, a service provider or an end-user. Administrative domains of different players do not overlap among themselves. The specifications are organized according to application codes that take into account the many poss
33、ible combinations of channel counts, optical tributary signal types, span distances, fibre types and system configurations. The reference configuration and application codes form the foundation for specifying the optical networking physical layer parameters. In this Recommendation, the use of an opt
34、ical supervisory channel has not been considered (except for the discussion in Appendix IV). Future versions and other new ITU-T Recommendations will further address this aspect of the OTN, possibly involving an arrangement of optical network elements on either side of an optical subnetwork interfac
35、e that is more complex than point-to-point. For these applications, different parameters beyond those specified for a point-to-point configuration may be required. This Recommendation presumes that the optical tributary signals transported within network media channels are digital rather than analog
36、ue. Specifications for systems enabling transport of analogue optical tributary signals are for further study. 2 References The following ITU-T Recommendations and other references contain provisions which, through reference in this text, constitute provisions of this Recommendation. At the time of
37、publication, the editions indicated were valid. All Recommendations and other references are subject to revision; users of this Recommendation are therefore encouraged to investigate the possibility of applying the most recent edition of the Recommendations and other references listed below. A list
38、of the currently valid ITU-T Recommendations is regularly published. The reference to a document within this Recommendation does not give it, as a stand-alone document, the status of a Recommendation. ITU-T G.652 Recommendation ITU-T G.652 (2009), Characteristics of a single-mode optical fibre and c
39、able. ITU-T G.653 Recommendation ITU-T G.653 (2010), Characteristics of a dispersion-shifted single-mode optical fibre and cable. ITU-T G.655 Recommendation ITU-T G.655 (2009), Characteristics of a non-zero dispersion-shifted single-mode optical fibre and cable. ITU-T G.664 Recommendation ITU-T G.66
40、4 (2012), Optical safety procedures and requirements for optical transport systems. 2 Rec. ITU-T G.959.1 (04/2016) ITU-T G.691 Recommendation ITU-T G.691 (2006), Optical interfaces for single channel STM-64 and other SDH systems with optical amplifiers. ITU-T G.692 Recommendation ITU-T G.692 (1998),
41、 Optical interfaces for multichannel systems with optical amplifiers. ITU-T G.693 Recommendation ITU-T G.693 (2009), Optical interfaces for intra-office systems. ITU-T G.694.1 Recommendation ITU-T G.694.1 (2012), Spectral grids for WDM applications: DWDM frequency grid. ITU-T G.695 Recommendation IT
42、U-T G.695 (2015), Optical interfaces for coarse wavelength division multiplexing applications. ITU-T G.707 Recommendation ITU-T G.707/Y.1322 (2007), Network node interface for the synchronous digital hierarchy (SDH). ITU-T G.709 Recommendation ITU-T G.709/Y.1331 (2012), Interfaces for the optical tr
43、ansport network. ITU-T G.870 Recommendation ITU-T G.870/Y.1352 (2012), Terms and definitions for optical transport networks. ITU-T G.872 Recommendation ITU-T G.872 (2012), Architecture of optical transport networks. ITU-T G.957 Recommendation ITU-T G.957 (2006), Optical interfaces for equipments and
44、 systems relating to the synchronous digital hierarchy. ITU-T G.8251 Recommendation ITU-T G.8251 (2010), The control of jitter and wander within the optical transport network (OTN). IEC 60825-1 IEC 60825-1 (2014), Safety of laser products Part 1: Equipment classification and requirements. IEC 60825-
45、2 IEC 60825-2 (2010), Safety of laser products Part 2: Safety of optical fibre communication systems (OFCS). 3 Terms and definitions 3.1 Terms defined elsewhere This Recommendation uses the following terms defined elsewhere: 3.1.1 completely standardized OTUk (OTUk): ITU-T G.709. 3.1.2 inter-domain
46、interface (IrDI): ITU-T G.870. 3.1.3 intra-domain interface (IaDI): ITU-T G.870. 3.1.4 network media channel: ITU-T G.870. 3.1.5 optical multiplex section (OMS): Clause 8.2 of ITU-T G.872. 3.1.6 optical supervisory channel (OSC): ITU-T G.692. 3.1.7 optical transmission section (OTS): Clause 8.3 of I
47、TU-T G.872. Rec. ITU-T G.959.1 (04/2016) 3 3.2 Terms defined in this Recommendation This Recommendation defines the following terms: 3.2.1 non-optical transport network (non-OTN): Systems not compliant with the suite of OTN Recommendations indicated in b-ITU-T G.871. In particular, non-OTN systems m
48、ay rely on client-specific overhead information for performance monitoring, management and protection switching or restoration of the single-channel client signals. 3.2.2 optical tributary signal (OTSi): Optical signal that is placed within a network media channel for transport across the optical ne
49、twork. This may consist of a single modulated optical carrier or a group of modulated optical carriers or subcarriers. 3.2.3 optical tributary signal class NRZ 1.25G: A class of continuous digital signals with non-return to zero (NRZ) line coding, from nominally 622 Mbit/s to nominally 1.25 Gbit/s. Optical tributary signal class NRZ 1.25G includes a signal with STM-4 bit rate according to ITU-T G.707. 3.2.4 optical tributary signal class NRZ 2.5G: A class of
