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 Corrigendum 1 (03/2016) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Digital sections and digital line system Metallic access networks Physic
2、al layer management for G.fast transceivers Corrigendum 1 Recommendation ITU-T G.997.2 (2015) Corrigendum 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 AN
3、ALOGUE 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 CO
4、ORDINATION 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 sy
5、stems 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 s
6、ection 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 ASP
7、ECTS G.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)/Cor.1 (03/2016)
8、 i Recommendation ITU-T G.997.2 Physical layer management for G.fast transceivers Corrigendum 1 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, s
9、tatus, inventory and performance management. Corrigendum 1 includes: Clarification of the DPU-NB interface. An increase of number of RFI bands from 16 to 32. Replacement of “short init“ with “fast init“. Fix for a typographical error in Table 7-8. Additon of special value for FRA time parameters. Fi
10、x for references. 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 11.1002/1000/12800 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 2016-0
11、7-22 15 11.1002/1000/12799 _ * 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)/Cor.1 (03/2016) FOREWORD The Inte
12、rnational 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 technical, o
13、perating 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 which, in turn
14、, 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 IEC. NOTE
15、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 ensure, e.
16、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 does not s
17、uggest 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 concerning the ev
18、idence, 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, which may
19、 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 2016 All rights reserved. No part of this publication may be
20、reproduced, by any means whatsoever, without the prior written permission of ITU. Rec. ITU-T G.997.2 (2015)/Cor.1 (03/2016) 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 . 2 4 Abbreviations and acronyms
21、2 5 Management architecture 4 6 Network management protocol . 5 7 Managed objects . 6 7.1 Line configuration objects 16 7.2 Channel configuration objects 30 7.3 Data path configuration objects 33 7.4 Line failures 33 7.5 Channel failures 34 7.6 Data path failures 34 7.7 Line performance monitoring o
22、bjects 34 7.8 Channel performance monitoring objects 38 7.9 Data path performance monitoring objects 39 7.10 Line test, diagnostics and status objects . 39 7.11 Channel test, diagnostics and status objects . 47 7.12 Data path test, diagnostics and status objects . 51 7.13 Inventory objects 51 8 Proc
23、edures for performance monitoring functions . 53 8.1 Line transmission states 53 8.2 Threshold reports 53 8.3 Unavailable and available state filters 54 8.4 TR1 filter 54 8.5 TR2 filter 54 8.6 Evaluation of TR1 54 8.7 Evaluation of TR2 55 8.8 Threshold report evaluation during transmission state cha
24、nges . 55 8.9 Performance history storage in network elements 55 8.10 Register size 56 8.11 Parameter counts 56 8.12 Date/time-stamping of reports 56 8.13 Inhibiting performance monitoring parameters 56 iv Rec. ITU-T G.997.2 (2015)/Cor.1 (03/2016) Page Appendix I Broadband Forum considerations on th
25、e FTTdp deployment scenario . 57 Bibliography. 58 Rec. ITU-T G.997.2 (2015)/Cor.1 (03/2016) 1 Recommendation ITU-T G.997.2 Physical layer management for G.fast transceivers Corrigendum 1 Editorial note: This is a complete-text publication. Modifications introduced by this corrigendum are shown in re
26、vision marks relative to Recommendation ITU-T G.997.2 (2015). 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 and performance management
27、. 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 data model b-IETF RFC 6020,
28、 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 definition of the YANG data model
29、 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, the editions indicated we
30、re 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 currently valid ITU-T Recommend
31、ations 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. ITU-T G.9700 Recommenda
32、tion 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 This Recommendation uses
33、the following term 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)/Cor.1 (03/2016) 3.2 Terms defined in this Recommendation This Re
34、commendation defines the following terms: 3.2.1 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. 3.2.2
35、defect: A limited 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 def
36、ect. 3.2.3 empty array: An array whose number of elements is zero. 3.2.4 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 considere
37、d as “failed“. 3.2.5 managed object: The management view of a managed resource. 3.2.6 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 an
38、d acronyms: ASN.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 distributio
39、n point FTTx 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) GDR Gamma Data Rate G.fast fast access to subscriber terminals LOM Loss of Margin L
40、OM-FE Far-End Loss of Margin LOR Loss of RMC Rec. ITU-T G.997.2 (2015)/Cor.1 (03/2016) 3 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
41、ME Management 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
42、 Media Dependent 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 Se
43、amless Rate Adaptation TDD Time Division Multiplexing TPS-TC Transport Protocol Specific Transmission Convergence TR Threshold Report UAS UnAvailable Second U-O Loop interface Central office end U-R Loop interface Remote side (i.e., subscriber end of the loop) 4 Rec. ITU-T G.997.2 (2015)/Cor.1 (03/2
44、016) 5 DPU mManagement architecture The management of an access node (AN) or a distribution point unit (DPU) is performed by the network management system (NMS), passing management information over the Q reference point to each ANs management entity (ME) (see Figure 5-1a) or through a Ppersistent Mm
45、anagement Agent (PMA) to the each DPUs management entity (ME) over the Q reference point (see Figure 5-1b). The NMS may also monitor each FAST G.fast transceiver unit remote side (FTU-R) via the related network terminations (NTs) ME and G reference point. The connection between the ME functions at t
46、he AN or DPU and at the NT is established over management channels provided by the FAST G.fast transceiver unit central office ends (FTU-Os) and FTU-Rs via the copper pairs. Figure 5-1a Reference model of FTTdp traditional AN deployment (shown for line 1 in all N lines (N1) connected to a DPUan AN)F
47、TTdp deployment (shown for line 1 in all N lines (N1) connected to a DPU) Figure 51b Reference model of FTTdp deployment with PMA and DPU (shown for line 1 in all N lines (N=1) connected to a DPU) Appendix I contains additional information regarding the Broadband Forum considerations on the fibre to
48、 the distribution point (FTTdp) deployment scenario (see also b-BBF TR-301). The fundamental purpose of the persistent management agent (PMA) (see Appendix I) is to allow the operations support systems (OSS)/NMS to perform all operations on a given DPU whether or not that DPU is actually powered. Th
49、is includes the following PMA functionality: firmware download and management; Rec. ITU-T G.997.2 (2015)/Cor.1 (03/2016) 5 initial provisioning; configuration, including rate control; test and diagnostics; statistics gathering; event reporting; performance monitoring (PM) history beyond current and previous interval counters; management protocol translation between Northbound to OSS and Southbound to DPU Q interface and the DPU-N
