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.997.2 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Amendment 3 (04/2017) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Digital sections and digital line system Metallic access networks Physical
2、 layer management for G.fast transceivers Amendment 3 Recommendation ITU-T G.997.2 (2015) Amendment 3 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
3、 CARRIER-TRANSMISSION SYSTEMS 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 COORDINA
4、TION OF RADIOTELEPHONY AND 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
5、G.910G.919 Digital sections 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
6、 and digital transmission 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
7、.1000G.1999 TRANSMISSION MEDIA 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.997.2 (2015)/Amd.3 (04/2017) i Rec
8、ommendation ITU-T G.997.2 Physical layer management for G.fast transceivers Amendment 3 Summary Recommendation ITU-T G.997.2 specifies the physical layer management for fast access to subscriber terminals (G.fast) transmission systems. It specifies managed objects for configuration, fault, status, i
9、nventory and performance management. Amendment 3 includes: A new annex for the management of remote power feeding (RPF). A new annex for the management of network termination (NT) software upgrades. A new annex for the management of Annex X and Annex T of ITU-T G.9701. Updated managed objects to sup
10、port new profiles 212a, 106c and 212c. Updated managed object to support additional international amateur radio (IAR) bands. History Edition Recommendation Approval Study Group Unique ID* 1.0 ITU-T G.997.2 2015-05-22 15 11.1002/1000/12375 1.1 ITU-T G.997.2 (2015) Cor. 1 2016-03-29 15 11.1002/1000/12
11、800 1.2 ITU-T G.997.2 (2015) Amd. 1 2016-05-07 15 11.1002/1000/12555 1.3 ITU-T G.997.2 (2015) Amd. 2 2016-07-22 15 11.1002/1000/12799 1.4 ITU-T G.997.2 (2015) Cor. 2 2016-12-22 15 11.1002/1000/13067 1.5 ITU-T G.997.2 (2015) Amd. 3 2017-04-06 15 11.1002/1000/13066 Keywords Distribution point unit, DP
12、U, G.fast transceivers, management, performance monitoring. _ * To access the Recommendation, type the URL http:/handle.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.997.2 (2015)/
13、Amd.3 (04/2017) FOREWORD 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 resp
14、onsible for studying technical, 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
15、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 WTSA Resolution 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborat
16、ive basis with ISO and 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 ma
17、ndatory provisions (to 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.
18、 The use of such words 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 ta
19、kes no position concerning 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
20、, protected by patents, 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
21、 part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. Rec. ITU-T G.997.2 (2015)/Amd.3 (04/2017) iii Table of Contents Page 1 Scope . 1 2 References . 1 3 Definitions 1 3.1 Terms defined elsewhere 1 3.2 Terms defined in this Recommendation
22、. 2 4 Abbreviations and acronyms 2 5 Management architecture 4 6 Network management protocol . 6 7 Managed objects . 6 7.1 Line configuration objects 19 7.2 Channel configuration objects 35 7.3 Data path configuration objects 39 7.4 Line failures 39 7.5 Channel failures 40 7.6 Data path failures 40
23、7.7 Line performance monitoring objects 40 7.8 Channel performance monitoring objects 45 7.9 Data path performance monitoring objects 46 7.10 Line test, diagnostics and status objects . 46 7.11 Channel test, diagnostics and status objects . 61 7.12 Data path test, diagnostics and status objects . 65
24、 7.13 Inventory objects 65 7.14 Link State related managed objects 68 8 Procedures for performance monitoring functions . 70 8.1 Line transmission states 70 8.2 Threshold reports 70 8.3 Unavailable and available state filters 71 8.4 TR1 filter 71 8.5 TR2 filter 71 8.6 Evaluation of TR1 71 8.7 Evalua
25、tion of TR2 72 8.8 Threshold report evaluation during transmission state changes . 72 8.9 Performance history storage in network elements 72 8.10 Register size 72 8.11 Parameter counts 73 iv Rec. ITU-T G.997.2 (2015)/Amd.3 (04/2017) Page 8.12 Date/time-stamping of reports 73 8.13 Inhibiting performa
26、nce monitoring parameters 73 Annex A Physical layer management for reverse power feeding (RPF) of remote access equipment 74 A.1 Scope 74 A.2 References 74 A.3 Definitions 74 A.4 Abbreviations and acronyms 74 A.5 DPU and NT management architecture 75 A.6 Network management protocol 75 A.7 DPU Northb
27、ound managed objects 79 Annex B to Annex R 85 Annex S Management for network termination (NT) software upgrade process . 86 S.1 Scope 86 S.2 References 86 S.3 Definitions 86 S.4 Abbreviations and acronyms 86 S.5 DPU management architecture . 86 S.6 Network management protocol 86 S.7 Managed objects
28、. 86 Annex T Annex X and Annex T of ITU-T G.9701 Managed objects . 91 T.1 Overview of Annex X and Annex T of ITU-T G.9701 managed objects 91 T.2 Annex X and Annex T of ITU-T G.9701 control objects 92 T.3 Annex X and Annex T of ITU-T G.9701 status objects . 93 T.4 Annex X and Annex T of ITU-T G.9701
29、inventory objects 94 Annex U to Annex W. 95 Annex X Cross-layer link state objects . 96 X.1 Overview of cross-layer link state objects 96 X.2 Cross-Layer Low power Mode Control . 96 Appendix I Broadband Forum considerations on the FTTdp deployment scenario . 101 Bibliography. 102 Rec. ITU-T G.997.2
30、(2015)/Amd.3 (04/2017) 1 Recommendation ITU-T G.997.2 Physical layer management for G.fast transceivers Amendment 3 Editorial note: This is a complete-text publication. Except for Annexes A, S and T, modifications introduced by this amendment are shown in revision marks relative to Recommendation IT
31、U-T G.997.2 (2015) plus its Cor.1 (2016), Amd.1 (2016), Amd.2 (2016) and Cor.2 (2016). 1 Scope This Recommendation specifies the physical layer management for fast access to subscriber terminals (G.fast) transmission systems. It specifies managed objects for configuration, fault, status, inventory a
32、nd performance management. The list of managed objects applies at the distribution point unit-Northbound (DPU-NB) interface, relating to the “DPU-MIB“ nomenclature used in ITU-T G.9701. The managed objects are defined to provide, at least, all the information necessary for translation into a YANG da
33、ta model b-IETF RFC 6020, although this does not exclude translation to other formats such as an abstract syntax notation one (ASN.1) (ITU-T X.680 series) management information base (MIB) description used in connection with the simple network management protocol (SNMP) b-IETF RFC 1157. The definiti
34、on of the YANG data model for G.fast-managed objects is outside the scope of this Recommendation. 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 publication,
35、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 of the curren
36、tly 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.994.1 Recommendation ITU-T G.994.1 (2012), Handshake procedures for digital subscriber line transceivers
37、. ITU-T G.9700 Recommendation ITU-T G.9700 (2014), Fast access to subscriber terminals (G.fast) Power spectral density specification. ITU-T G.9701 Recommendation ITU-T G.9701 (2014), Fast access to subscriber terminals (G.fast) Physical layer specification. 3 Definitions 3.1 Terms defined elsewhere
38、This Recommendation uses the following terms defined elsewhere: 3.1.1 managed resource b-ITU-T M.3010: The abstraction of those aspects of a telecommunication resource (logical or physical) required for telecommunications management. 2 Rec. ITU-T G.997.2 (2015)/Amd.3 (04/2017) 3.2 Terms defined in t
39、his Recommendation This Recommendation defines the following terms: 3.2.1 AdminStatus: (Based on clause 12.1.1.7 of ITU-T G.9701) The AdminStatus represents the configured, desired state of the interface. The AdminStatus “up“ is equivalent with the interface “enabled=true“, where the desired link st
40、ate is L0, L2.1N, L2.1B, or L2.2. The AdminStatus “down“ is equivalent with the interface “enabled=false“, where the desired link state is L3. NOTE The relation between the AdminStatus (“up“ or “down“) and the interface (enabled=“true“ or “false“) is defined in the IETF YANG Data Model for Interface
41、 Management b-IETF RFC 7223. 3.2.2 anomaly: 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. 3.2.3 defect: A lim
42、ited interruption in the ability 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. 3.2.4 em
43、pty array: An array whose number of elements is zero. 3.2.5 failure: A termination 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“
44、. 3.2.6 managed object: The management view of a managed resource. 3.2.7 DPU-NB interface: The interface between the persistent management agent and the management entity of the distribution point unit. 4 Abbreviations and acronyms This Recommendation uses the following abbreviations and acronyms: A
45、SN.1 Abstract Syntax Notation one CV Code Violation CV-C Code Violation Channel DPU Distribution Point Unit DPU-NB DPU Northbound DRA Dynamic Resource Allocation ES Errored Second FAST Fast Access to Subscriber Terminals FE Far-End FRA Fast Rate Adaptation FTTdp Fibre To The distribution point FTTx
46、Fibre To The x FTU FAST Transceiver Unit FTU-O FAST Transceiver Unit Central office end (i.e., network operator end of the loop) FTU-R FAST Transceiver Unit Remote side (i.e., subscriber end of the loop) Rec. ITU-T G.997.2 (2015)/Amd.3 (04/2017) 3 GDR Gamma Data Rate G.fast fast access to subscriber
47、 terminals LOM Loss of Margin LOM-FE Far-End Loss of Margin LOR Loss of RMC LOR-FE Far-End Loss of RMC LORS LOR Second LOS Loss of Signal LOS-FE Far-End Loss of Signal LOSS LOS Second LPR Loss of Power LPR-FE Far-End Loss of Power MIB Management Information Base MDU Multi-Dwelling Unit ME Management
48、 Entity NDR Net Data Rate NDRds downstream Net Data Rate NDRus upstream Net Data Rate NE Network Element NMS Network Management System NT Network Termination OLR On-Line Reconfiguration OSS Operations Support Systems PM Performance Monitoring PMA Persistent Management Agent PMD Physical Media Depend
49、ent PMS-TC Physical Media Specific Transmission Convergence PSD Power Spectral Density REIN Repetitive Electrical Impulse Noise RMC Robust Management Channel RPA RMC Parameter Adjustment SES Severely Errored Second SNMP Simple Network Management Protocol SNR Signal-to-Noise Ratio SRA Seamless Rate Adaptation TDD Time Division Multiplexing TPS-TC Transport Protocol Specific Transmission Convergence 4 Rec. ITU-T G.997.2 (2015)/Amd.3
