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.997.1 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (11/2016) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Digital sections and digital line system Metallic access networks Physical layer manag
2、ement for digital subscriber line transceivers Recommendation ITU-T G.997.1 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 SYST
3、EMS G.200G.299 INDIVIDUAL 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
4、 LINE TELEPHONY G.450G.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 section
5、s at hierarchical bit 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
6、systems for customer 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 M
7、EDIA CHARACTERISTICS 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.997.1 (11/2016) i Recommendation ITU-T G.997.1 Physical laye
8、r management for digital subscriber line transceivers Summary Recommendation ITU-T G.997.1 specifies the physical layer management for asymmetric digital subscriber line (ADSL) and very high speed digital subscriber line 2 (VDSL2) transmission systems. It specifies means of communication on a transp
9、ort transmission channel defined in the physical layer Recommendations ITU-T G.992.1, ITU-T G.992.2, ITU-T G.992.3, ITU-T G.992.4, ITU-T G.992.5 and ITU-T G.993.2. It specifies network elements (NE) content and syntax for configuration, fault and performance management. The revision of this Recommen
10、dation includes the management information base (MIB) elements for the physical layer management of Recommendation ITU-T G.993.2 and additional MIB elements for the physical layer management of Recommendations ITU-T G.992.3 and ITU-T G.992.5. The 2016 edition of this Recommendation integrates ITU-T
11、G.997.1 (2012) and all its amendments and corrigenda. This edition does not add any new technical material. History Edition Recommendation Approval Study Group Unique ID* 1.0 ITU-T G.997.1 1999-07-02 15 11.1002/1000/4723 2.0 ITU-T G.997.1 2003-05-22 15 11.1002/1000/6283 2.1 ITU-T G.997.1 (2003) Amd.
12、 1 2003-12-14 15 11.1002/1000/7081 2.2 ITU-T G.997.1 (2003) Amd. 2 2005-01-13 15 11.1002/1000/7492 3.0 ITU-T G.997.1 2005-09-06 15 11.1002/1000/8550 4.0 ITU-T G.997.1 2006-06-06 15 11.1002/1000/8768 4.1 ITU-T G.997.1 (2006) Cor. 1 2006-12-14 15 11.1002/1000/8994 4.2 ITU-T G.997.1 (2006) Amd. 1 2006-
13、12-14 15 11.1002/1000/8995 4.3 ITU-T G.997.1 (2006) Amd. 2 2007-11-22 15 11.1002/1000/9168 4.4 ITU-T G.997.1 (2006) Amd. 3 2008-08-22 15 11.1002/1000/9389 5.0 ITU-T G.997.1 2009-04-22 15 11.1002/1000/9676 5.1 ITU-T G.997.1 (2009) Cor. 1 2009-11-13 15 11.1002/1000/10417 5.2 ITU-T G.997.1 (2009) Amd.
14、1 2010-06-11 15 11.1002/1000/10416 5.3 ITU-T G.997.1 (2009) Amd. 2 2010-11-29 15 11.1002/1000/11016 5.4 ITU-T G.997.1 (2009) Amd. 3 2011-06-22 15 11.1002/1000/11130 5.5 ITU-T G.997.1 (2009) Cor. 2 2011-10-29 15 11.1002/1000/11397 5.6 ITU-T G.997.1 (2009) Amd. 4 2011-12-16 15 11.1002/1000/11398 5.7 I
15、TU-T G.997.1 (2009) Amd. 5 2012-02-13 15 11.1002/1000/11504 6.0 ITU-T G.997.1 2012-06-13 15 11.1002/1000/11645 6.1 ITU-T G.997.1 (2012) Amd. 1 2012-12-07 15 11.1002/1000/11798 6.2 ITU-T G.997.1 (2012) Amd. 2 2013-04-22 15 11.1002/1000/11893 _ * To access the Recommendation, type the URL http:/handle
16、.itu.int/ in the address 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.997.1 (11/2016) 6.3 ITU-T G.997.1 (2012) Amd. 3 2013-08-29 15 11.1002/1000/11996 6.4 ITU-T G.997.1 (2012) Amd. 4 2015-02-13 15 11.10
17、02/1000/12374 6.5 ITU-T G.997.1 (2012) Amd. 5 2015-11-06 15 11.1002/1000/12566 6.6 ITU-T G.997.1 (2012) Amd. 6 2016-03-29 15 11.1002/1000/12798 6.7 ITU-T G.997.1 (2012) Cor. 1 2016-11-13 15 11.1002/1000/13108 7.0 ITU-T G.997.1 2016-11-13 15 11.1002/1000/13346 Rec. ITU-T G.997.1 (11/2016) iii FOREWOR
18、D The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications, information and communication technologies (ICTs). The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying te
19、chnical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes the topics for study by the ITU-T study groups whic
20、h, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by the procedure laid down in 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
21、IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. Compliance with this Recommendation is voluntary. However, the Recommendation may contain certain mandatory provisions (to
22、ensure, e.g., interoperability or applicability) and compliance with the Recommendation is achieved when all of these mandatory provisions 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
23、does not suggest that compliance with the Recommendation is required of any party. INTELLECTUAL PROPERTY RIGHTSITU draws attention 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 concern
24、ing the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, ITU had received notice of intellectual property, protected by patents,
25、 which may be required to implement this Recommendation. However, implementers are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database at http:/www.itu.int/ITU-T/ipr/. ITU 2017 All rights reserved. No part of this publicati
26、on may be reproduced, by any means whatsoever, without the prior written permission of ITU. iv Rec. ITU-T G.997.1 (11/2016) Table of Contents Page 1 Scope . 1 2 References . 1 3 Definitions 2 4 Abbreviations and acronyms 3 5 Overview . 6 5.1 Physical layer management mechanisms . 7 6 OAM communicati
27、ons channel 8 6.1 Requirements on the physical media dependent (PMD) layer for the bit-oriented clear embedded operations channel (EOC) 9 6.2 Requirements on the PMD layer for the message-oriented clear EOC 10 6.3 Data link layer 10 6.4 The SNMP protocol 13 7 Management information base (MIB) elemen
28、ts . 15 7.1 Failures . 18 7.2 Performance monitoring functions . 20 7.3 Configuration functions 33 7.4 Inventory information . 71 7.5 Test, diagnostic and status parameters . 73 7.6 Network management elements partitioning 96 Appendix I Processing examples 140 I.1 Illustration of transmitter process
29、ing 140 I.2 Illustration of receiver processing 141 Appendix II Downstream power back-off 142 II.1 Introduction 142 II.2 Description of the DPBO method . 143 Bibliography. 146 Rec. ITU-T G.997.1 (11/2016) 1 Recommendation ITU-T G.997.1 Physical layer management for digital subscriber line transceive
30、rs 1 Scope This Recommendation specifies the physical layer management for asymmetric digital subscriber line (ADSL) and very high speed digital subscriber line 2 (VDSL2) transmission systems based on the usage of indicator bits and embedded operations channel (EOC) messages defined in the ITU-T G.9
31、92.x series of ITU-T Recommendations and in ITU-T G.993.2, and the clear embedded operations channel defined in this Recommendation. It specifies network management elements content for configuration, fault, and performance management. The mechanisms to provide operations, administration and mainten
32、ance (OAM) functions, and to generate OAM flows F1, F2 and F3, will depend on the transport mechanism of the physical layer transmission system as well as on the supervision functions contained within the physical layer termination functions of equipment. This Recommendation specifies only flow F3 t
33、ransmission path level. For interrelationships of this Recommendation with other Recommendations of the ITU-T G.99x-series, see ITU-T G.995.1. 2 References The following ITU-T Recommendations and other references contain provisions which, through reference in this text, constitute provisions of this
34、 Recommendation. At the time of 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
35、references listed below. A list 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.992.1 Recommendation ITU-T G.992.1 (1999), Asymmetric digit
36、al subscriber line (ADSL) transceivers. ITU-T G.992.2 Recommendation ITU-T G.992.2 (1999), Splitterless asymmetric digital subscriber line (ADSL) transceivers. ITU-T G.992.3 Recommendation ITU-T G.992.3 (2005), Asymmetric digital subscriber line transceivers 2 (ADSL2). ITU-T G.992.4 Recommendation I
37、TU-T G.992.4 (2002), Splitterless asymmetric digital subscriber line transceivers 2 (splitterless ADSL2). ITU-T G.992.5 Recommendation ITU-T G.992.5 (2005), Asymmetric digital subscriber line (ADSL) transceivers Extended bandwidth ADSL2 (ADSL2plus). ITU-T G.993.2 Recommendation ITU-T G.993.2 (2011),
38、 Very high speed digital subscriber line transceivers 2 (VDSL2). ITU-T G.993.5 Recommendation ITU-T G.993.5 (2010), Self-FEXT cancellation (vectoring) for use with VDSL2 transceivers. ITU-T G.994.1 Recommendation ITU-T G.994.1 (2003), Handshake procedures for digital subscriber line (DSL) transceive
39、rs. 2 Rec. ITU-T G.997.1 (11/2016) ITU-T G.995.1 Recommendation ITU-T G.995.1 (2001), Overview of digital subscriber line (DSL) Recommendations. ITU-T G.998.4 Recommendation ITU-T G.998.4 (2010), Improved impulse noise protection for DSL transceivers. ITU-T I.432.x Recommendations ITU-T I.432.x-seri
40、es, B-ISDN user-network interface Physical layer specification. ITU-T I.610 Recommendation ITU-T I.610 (1999), B-ISDN operation and maintenance principles and functions. ITU-T T.35 Recommendation ITU-T T.35 (2000), Procedure for the allocation of ITU-T defined codes for non-standard facilities. IETF
41、 RFC 1157 IETF RFC 1157 (1990), A Simple Network Management Protocol (SNMP). 3 Definitions This Recommendation defines the following terms: 3.1 accumulation period: Period of time used by the network management system (NMS) to accumulate sufficient number of parameter samples. 3.2 anomaly: An anomal
42、y is a discrepancy between the actual and desired characteristics of an item. The desired characteristic may be expressed in the form of a specification. An anomaly may or may not affect the ability of an item to perform a required function. 3.3 bearer channel: As defined in the respective Recommend
43、ation (also referred to as “frame bearer“ in various digital subscriber line (DSL) Recommendations). 3.4 clear embedded operations channel (EOC): An octet oriented data channel multiplexed in the physical layer transmission frame structure. 3.5 defect: A defect is a limited interruption in the abili
44、ty of an item to perform a required function. It may or may not lead to maintenance action depending on the results of additional analysis. Successive anomalies causing a decrease in the ability of an item to perform a required function are considered a defect. 3.6 failure: A failure is the terminat
45、ion of the ability of an item to perform a required function. NOTE After failure, the item has a fault. Analysis of successive anomalies or defects affecting the same item can lead to the item being considered as “failed“. 3.7 full initialization: Any type of initialization procedure defined in resp
46、ective Recommendations, except short initialization. 3.8 masked subcarrier: A subcarrier that is not transmitted during initialization and showtime. 3.9 MEDLEY set: A set of subcarriers used during the digital subscriber line (DSL) initialization. This set is defined in the respective Recommendation
47、s. 3.10 net data rate: Net data rate is defined in the ITU-T G.992.x-series Recommendations and in ITU-T G.993.2. 3.11 short initialization: Shortened type of initialization procedure, as specified in clause 7.2.1.3.3. Short initialization includes fast retrain, as specified in ITU-T G.992.2, and sh
48、ort initialization, as specified in ITU-T G.992.3 and ITU-T G.992.4. 3.12 showtime: As defined in the respective Recommendations. Rec. ITU-T G.997.1 (11/2016) 3 3.13 xDSL: Any of the various types of digital subscriber line technologies. 3.14 -interface, -interface: Interface between the physical me
49、dia specific-transmission convergence (PMS-TC) and the transport protocol specific-transmission convergence (TPS-TC) sub-layers of the xTU, as defined in ITU-T G.995.1 and the respective Recommendations. 3.15 -interface: Application interface of the xTU, as defined in ITU-T G.995.1 and the respective Recommendations. 4 Abbreviations and acronyms This Recommendation uses the following abbreviations and acronyms: ADSL Asymmetric Digital Subscriber Line ADSL2 Asymmetri
