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 Series G TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Supplement 62 (02/2018) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Gfast certification ITU-T G-series Recommendations Supplement 62 ITU-T
2、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 INDIVIDUAL CHARACTERISTICS OF INTERNATIONAL CARRIER TELEPHONE SYSTE
3、MS 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.450G.499 TRANSMISSION MEDIA AND OPTICAL SYSTEMS CHARACTERISTICS
4、G.600G.699 DIGITAL TERMINAL EQUIPMENTS G.700G.799 DIGITAL NETWORKS G.800G.899 DIGITAL SECTIONS AND DIGITAL LINE SYSTEM G.900G.999 MULTIMEDIA QUALITY OF SERVICE AND PERFORMANCE GENERIC AND USER-RELATED ASPECTS G.1000G.1999 TRANSMISSION MEDIA CHARACTERISTICS G.6000G.6999 DATA OVER TRANSPORT GENERIC AS
5、PECTS 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. G series Supplement 62 (02/2018) i Supplement 62 to ITU-T G-series Recommendations Gfast certification Summary Supplement 62 to ITU-T G-s
6、eries Recommendations provides information regarding the Gfast certification of equipment implementing Recommendations ITU-T G.9700 and ITU-T G.9701. History Edition Recommendation Approval Study Group Unique ID* 1.0 ITU-T G Suppl. 62 2018-02-09 15 11.1002/1000/13586 Keywords Certification, G.fast.
7、* 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 G series Supplement 62 (02/2018) FOREWORD The International Telecommunication Union (ITU
8、) 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, operating and tariff questions and issu
9、ing 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, produce Recommendations on these top
10、ics. 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 In this publication, the expression “A
11、dministration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. Compliance with this publication is voluntary. However, the publication may contain certain mandatory provisions (to ensure, e.g., interoperability or applicability) and comp
12、liance with the publication 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 suggest that compliance with the publication is req
13、uired of any party. INTELLECTUAL PROPERTY RIGHTSITU draws attention to the possibility that the practice or implementation of this publication may involve the use of a claimed Intellectual Property Right. ITU takes no position concerning the evidence, validity or applicability of claimed Intellectua
14、l Property Rights, whether asserted by ITU members or others outside of the publication development process. As of the date of approval of this publication, ITU had not received notice of intellectual property, protected by patents, which may be required to implement this publication. However, imple
15、menters 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 2018 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior writte
16、n permission of ITU. G series Supplement 62 (02/2018) 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 Supplement 1 4 Abbreviations and acronyms 1 5 The general concept of certification . 2 6 Gfast Certification 2 Bibliog
17、raphy. 3 G series Supplement 62 (02/2018) 1 Supplement 62 to ITU-T G-series Recommendations Gfast certification 1 Scope The purpose of this Supplement is to provide information regarding the Gfast certification of equipment implementing ITU-T G.9700 and ITU-T G.9701. 2 References ITU-T G.9700 Recomm
18、endation 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 Supplement uses
19、the following term defined elsewhere: 3.1.1 Gfast Certification: Term defined by the Broadband Forum that is used to refer to their Certification Program and Test Plan for G.fast technology (The absence of the “dot“ in “Gfast certification“ is intentional). 3.2 Terms defined in this Supplement This
20、Supplement does not define any additional terms. 4 Abbreviations and acronyms This Supplement uses the following abbreviations and acronyms: CPE Customer Premises Equipment DPU Distribution Point Unit FRA Fast Rate Adaptation FTU Fast Transceiver Unit FTU-O FTU at the Optical network unit FTU-R FTU
21、at the Remote site (i.e., subscriber end of the loop) PSD Power Spectral Density RFI Radio Frequency Interference RMC Robust Management Channel RPA RMC Parameter Adjustment SRA Seamless Rate Adaptation TIGA Transmitter-Initiated Gain Adjustment 2 G series Supplement 62 (02/2018) 5 The general concep
22、t of certification Certification is the verification, and more specifically the confirmation thereof, that a certain implementation of a specification successfully passes a defined set of test cases, where each test case verifies whether the implementation adheres to a specific requirement contained
23、 in the specification. Certification does not necessarily include verification of all requirements of a specification, and hence, although providing a valuable indication thereof, it does not necessarily imply conformity to the specification. 6 Gfast certification ITU-T G.9700 and ITU-T G.9701 are t
24、he basis for a Gfast Certification Program developed by the Broadband Forum. This is a voluntary certification scheme specifically for G.fast technology. The Broadband Forum Internal Report, b-BBF IR-337, provides a set of functional, stability and basic performance test cases and related pass/fail
25、requirements for implementations according to ITU-T G.9700 and ITU-T G.9701. As such, Gfast Certification is not a verification of conformity to all requirements of these Recommendations (see clause 5). The primary goal of b-BBF-IR-337 is to provide a set of test cases and a framework to verify inte
26、roperability between an FTU-O (as part of a DPU) and one or more FTU-Rs (as part of one or more CPEs). The test plan has three areas of focus: baseline performance, stability and mandatory features. Verification of key features within G.fast technology include bit-swap, FRA, SRA, RPA, retransmission
27、, test modes, PSD control, TIGA, RFI controls and verification of performance counters. Basic assurance of performance includes required operation in noisy conditions, required data rate versus loop length, and mean time between errors. b-BBF-IR-337 serves as the test plan, including pass/fail requi
28、rements for each test case, for the Broadband Forum Gfast Certification Program. Technical content in this test plan includes test setup information, equipment configuration requirements, test procedures and pass/fail requirements for each test case. The Broadband Forum has made publicly available t
29、he Abstract Test Plan b-BBF ATP-337, which is a summary of its Internal Report b-BBF-IR-337. This summary document lists the test cases and their purpose within the Gfast Certification Program. The Broadband Forum extends the Gfast Certification Test Plan to address new functionality added in amendm
30、ents to ITU-T G.9700 and ITU-T G.9701. This includes testing according to the various G.fast profiles, where each profile targets operation with a certain signal bandwidth and power and over a certain physical medium (telephone wiring, high quality twisted pairs or coaxial cable). For additional det
31、ails about the Gfast Certification Program, including the requirements for participation in the programme or to view the list of currently certified devices, please refer to the Broadband Forum website at b-BBF certification. This website lists the demonstrated interoperability between CPE and DPU e
32、quipment. G series Supplement 62 (02/2018) 3 Bibliography All references are subject to revision; users of this Supplement are therefore encouraged to investigate the possibility of applying the most recent edition of the references listed below. b-BBF ATP-337 Broadband Forum, ATP-337, (2017), Gfast
33、 Certification Abstract Test Plan. b-BBF certification Broadband Forum Certification Website. b-BBF IR-337 Broadband Forum, IR-337 (2017), Gfast Certification Test Plan. .Printed in Switzerland Geneva, 2018 SERIES OF ITU-T RECOMMENDATIONS Series A Organization of the work of ITU-T Series D Tariff an
34、d accounting principles and international telecommunication/ICT economic and policy issues Series E Overall network operation, telephone service, service operation and human factors Series F Non-telephone telecommunication services Series G Transmission systems and media, digital systems and network
35、s Series H Audiovisual and multimedia systems Series I Integrated services digital network Series J Cable networks and transmission of television, sound programme and other multimedia signals Series K Protection against interference Series L Environment and ICTs, climate change, e-waste, energy effi
36、ciency; construction, installation and protection of cables and other elements of outside plant Series M Telecommunication management, including TMN and network maintenance Series N Maintenance: international sound programme and television transmission circuits Series O Specifications of measuring e
37、quipment Series P Telephone transmission quality, telephone installations, local line networks Series Q Switching and signalling, and associated measurements and tests Series R Telegraph transmission Series S Telegraph services terminal equipment Series T Terminals for telematic services Series U Te
38、legraph switching Series V Data communication over the telephone network Series X Data networks, open system communications and security Series Y Global information infrastructure, Internet protocol aspects, next-generation networks, Internet of Things and smart cities Series Z Languages and general software aspects for telecommunication systems
