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.9964 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Amendment 2 (09/2016) SERIES G: TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS Access networks In premises networks Unified high-speed wireline-based home
2、 networking transceivers Power spectral density specification Amendment 2 Recommendation ITU-T G.9964 (2011) Amendment 2 ITU-T G-SERIES RECOMMENDATIONS TRANSMISSION SYSTEMS AND MEDIA, DIGITAL SYSTEMS AND NETWORKS INTERNATIONAL TELEPHONE CONNECTIONS AND CIRCUITS G.100G.199 GENERAL CHARACTERISTICS COM
3、MON TO ALL ANALOGUE 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
4、G.400G.449 COORDINATION 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 MULTIMEDIA QUALITY OF SERVICE AND PERFORMAN
5、CE GENERIC AND USER-RELATED ASPECTS 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 Metallic access networks G.9700G.9799 Optical line systems for local and access ne
6、tworks G.9800G.9899 In premises networks G.9900G.9999 For further details, please refer to the list of ITU-T Recommendations. Rec. ITU-T G.9964 (2011)/Amd.2 (09/2016) i Recommendation ITU-T G.9964 Unified high-speed wireline-based home networking transceivers Power spectral density specification Ame
7、ndment 2 Summary Recommendation ITU-T G.9964 specifies the control parameters that determine spectral content, power spectral density (PSD) mask requirements, a set of tools to support reduction of the transmit PSD, means to measure this PSD for transmission over telephone wiring, power line wiring
8、and coaxial cable, as well as the allowable total transmit power into a specified termination impedance. It complements the system architecture and physical layer (PHY) specification in Recommendation ITU-T G.9960, and the data link layer (DLL) specification in Recommendation ITU-T G.9961, as well a
9、s the modifications and additions to these Recommendations specifying the multiple input/multiple output (MIMO) home networking transceiver in Recommendation ITU-T G.9963. Amendment 1 adds support for a new profile for 200 MHz baseband coax. Amendment 2 contains the specification of spectral content
10、 for 200 MHz bandplan for telephone lines. History Edition Recommendation Approval Study Group Unique ID* 1.0 ITU-T G.9964 2011-12-16 15 11.1002/1000/11406 1.1 ITU-T G.9964 (2011) Amd. 1 2016-02-26 15 11.1002/1000/12579 1.2 ITU-T G.9964 (2011) Amd. 2 2016-09-30 15 11.1002/1000/12843 * To access the
11、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.9964 (2011)/Amd.2 (09/2016) FOREWORD The International Telecommunication Union (ITU) is the
12、 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 issuing Reco
13、mmendations 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 topics. The
14、 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 Recommendation, the expression “Admini
15、stration“ 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.g., interoperability or applicability) and com
16、pliance 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 suggest that compliance with the Recommendation
17、 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 evidence, validity or applicability of claimed I
18、ntellectual 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 be required to implement this Recommendation.
19、 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 publication may be reproduced, by any means whatsoever, without t
20、he prior written permission of ITU. Rec. ITU-T G.9964 (2011)/Amd.2 (09/2016) iii Table of Contents Page 1 Scope . 1 2 References . 1 3 Definitions 1 4 Abbreviations and acronyms 2 5 Transmit PSD mask 3 5.1 Sub-carrier masking 3 5.2 Power spectral density shaping 4 5.3 Notching of international amate
21、ur radio bands 5 5.4 Power spectral density ceiling 5 5.5 Notching of VDSL2 bands . 5 6 Medium-dependent specification of spectral content . 5 6.1 Specification of spectral content for telephone lines 5 6.2 Specification of spectral content for power lines . 8 6.3 Specification of spectral content f
22、or coax 10 6.4 Termination impedance 15 6.5 Total transmit power . 15 6.6 Receiver input impedance 15 Annex A 16 Annex B 17 Annex C 18 Annex D International amateur radio bands . 19 Annex E Impact of ITU-T G.9960 on VDSL2 service . 20 Appendix I Additional radio frequency bands 21 Bibliography. 23 R
23、ec. ITU-T G.9964 (2011)/Amd.2 (09/2016) 1 Recommendation ITU-T G.9964 Unified high-speed wireline-based home networking transceivers Power spectral density specification Amendment 2 Editorial note: This is a complete-text publication. Modifications introduced by this amendment are shown in revision
24、marks relative to Recommendation ITU-T G.9964 (2011) plus its Amendment 1 (2016). 1 Scope This Recommendation specifies the control parameters that determine spectral content, power spectral density (PSD) mask requirements, a set of tools to support reduction of the transmit PSD, means to measure th
25、is PSD for transmission over telephone wiring, power line wiring and coaxial cable, as well as the allowable total transmit power into a specified termination impedance. It complements the system architecture and physical layer (PHY) specification in ITU-T G.9960, and the data link layer (DLL) speci
26、fication in ITU-T G.9961 as well as the modifications and additions to these Recommendations specifying the multiple input/multiple output (MIMO) home networking transceiver in ITU-T G.9963. 2 References The following ITU-T Recommendations and other references contain provisions which, through refer
27、ence in this text, constitute provisions of this 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
28、recent edition of the Recommendations and other 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.9960 Recomm
29、endation ITU-T G.9960 (2011), Unified high-speed wireline-based home networking transceivers System architecture and physical layer specification. ITU-T G.9961 Recommendation ITU-T G.9961 (2010), Unified high-speed wireline-based home networking transceivers Data link layer specification. ITU-T G.99
30、63 Recommendation ITU-T G.9963 (2011), Unified high-speed wireline-based home networking transceivers Multiple input/multiple output specification. 3 Definitions This Recommendation defines the following terms: 3.1 bandplan: A specific range of the frequency spectrum that is associated with only one
31、 domain. Multiple bandplans may be used in the same domain provided that any bandplan is either a subset or a superset of all other bandplans in the same domain. The bandplan is defined by a lower frequency and upper frequency except for radio frequency (RF), which is defined by a bandwidth and cent
32、re frequency. 3.2 baseband: A frequency band defined by an up-convert frequency FUC = 0 and an up-shift frequency FUS = FSCN/2 (see Table 7-67 of ITU-T G.9960). 2 Rec. ITU-T G.9964 (2011)/Amd.2 (09/2016) 3.3 domain: A part of an ITU-T G.9960 home network comprising the domain master and all those no
33、des that are registered with the same domain master. In the context of this Recommendation, use of the term “domain“ without a qualifier means “ITU-T G.9960 domain“, and use of the term “alien domain“ means “non-ITU-T G.9960 domain“. Additional qualifiers (e.g., “power-line“) may be added to either
34、“domain“ or “alien domain“. 3.4 domain master (DM): A node supporting the domain master functionality that manages (coordinates) all other nodes of the same domain (i.e., assigns bandwidth resources and manages priorities). Only one active domain master is allowed in a domain, and all nodes within a
35、 domain are managed (coordinated) by a single domain master. If a domain master fails, another node of the same domain, capable of operating as a domain master, should pick up the function of the domain master. 3.5 home network: Two or more nodes that can communicate with each other either directly
36、or through a relay node at the physical layer, or through an inter-domain bridge above the physical layer. A home network consists of one or more domains. In the context of this Recommendation, use of the term “home network“ means “ITU-T G.9960 home network“. Use of the term “alien home network“ mea
37、ns “non-ITU-T G.9960 home network“. Use of the term “network“ without a qualifier means any combination of “ITU-T G.9960 home network“, “non-ITU-T G.9960 home network“ and “access network“. Use of the term “alien network“ means any combination of “non-ITU-T G.9960 home network“ and “access network“.
38、 3.6 medium: A wire-line facility, of a single wire class, allowing physical connection between nodes. Nodes connected to the same medium may communicate on the physical layer, and may interfere with each other unless they use orthogonal signals (e.g., different frequency bands, different time perio
39、ds). 3.7 node: Any network device that contains an ITU-T G.9960 transceiver. In the context of this Recommendation, use of the term “node“ without a qualifier means “ITU-T G.9960 node“, and use of the term “alien node“ means “non-ITU-T G.9960 node“. Additional qualifiers (e.g., “relay“) may be added
40、 to either “node“ or “alien node“. 3.8 passband: A frequency band defined by an up-convert frequency FUC = 0 and an up-shift frequency FUS FSCN/2 (see Table 7-67 of ITU-T G.9960). 3.9 radio frequency (RF): A frequency band defined by an up-convert frequency FUC 0 and a centre frequency FC = FUC + FU
41、S FSCN/2 (see Tables 7-67 and 7-68 of ITU-T G.9960). 3.10 sub-carrier (OFDM sub-carrier): The centre frequency of each OFDM sub-channel onto which bits may be modulated for transmission over the sub-channel. 3.11 sub-channel (OFDM sub-channel): A fundamental element of OFDM modulation technology. Th
42、e OFDM modulator partitions the channel bandwidth into a set of parallel sub channels. 3.12 wire class: One of the classes of wire, having the same general characteristics: coaxial cable, home electrical-power wire, phone-line wire and Category 5 cable. 4 Abbreviations and acronyms This Recommendati
43、on uses the following abbreviations and acronyms: BB BaseBand CB Coax Baseband CRF Coax Radio Frequency DM Domain Master Rec. ITU-T G.9964 (2011)/Amd.2 (09/2016) 3 LPM Limit PSD Mask OFDM Orthogonal Frequency Division Multiplexing PB Power-line Baseband PHY Physical Layer PSD Power Spectral Density
44、PSDC PSD Ceiling PSM PSD Shaping Mask RF Radio Frequency RPM Regional PSDM Mask SM Sub-carrier Mask 5 Transmit PSD mask Transmit PSD mask (TxPSD) is determined by a sub-carrier mask (SM), a PSD shaping mask (PSM), a notching of international amateur radio bands defined in this clause, the limit PSD
45、mask (LPM) defined for each particular medium, and a regional PSD mask (RPM) if specified in a regional annex (see ITU-T G.9960). The same TxPSD shall be applied to all nodes in the domain. For an ITU-T G.9960 transceiver, the PSD of the transmit signal at any frequency shall never exceed the transm
46、it PSD mask. For an ITU-T G.9963 transceiver, the sum of PSDs of the two transmit signals transmitted from the two Tx ports at any frequency shall never exceed the TxPSD. The PSD of the transmit signal may be further limited by a PSD ceiling (PSDC) that is applied to nodes involved in a particular c
47、onnection (clause 5.4). The LPM (see clauses 6.1.2, 6.2.2 and 6.3.2) specifies the absolute limit of the transmit PSD. However, if an RPM is specified for a particular region, the absolute limit shall be the minimum level between the LPM and RPM at any given frequency. The SM, PSDC, and PSM provide
48、further reduction and shaping of the transmit PSD using three mechanisms: sub-carrier masking (notching), PSD ceiling (limit on PSD level), and PSD shaping. ITU-T G.9960 and ITU-T G.9963 transceivers shall support sub-carrier masking, notching of international amateur radio bands, and PSD ceiling. S
49、upport of PSD shaping is optional. The transmit PSD mask shall comply with national and regional regulatory requirements. The LPM is defined based on the assumption that measurements are made using equipment conforming to b-IEC CISPR 16-1 specifications using an RMS detector with a “maximum hold“ function and using a resolution bandwidth of 9 kHz for frequencies below 30 MHz and 120 kHz for frequencies above 30 MHz. In order to conform to b-IEC CISPR 22 and make reliable measureme
