ETSI EN 302 878-3 V1.1.1 (2011-11)

Access, Terminals, Transmission and Multiplexing (ATTM); Third Generation Transmission Systems for Interactive Cable Television Services - IP Cable Modems; Part 3: Downstream Radio Frequency Interface; DOCSIS 3.0

DEN/ATTM-003006-3

Dostop, priključki, prenos in multipleksiranje (ATTM) - Tretja generacija prenosnih sistemov za storitve interaktivne kabelske televizije - IP-kabelski modemi - 3. del: Navzdolnji radiofrekvenčni vmesnik - DOCSIS 3.0

Ta dokument dovolj podrobno opredeljuje zahtevane radiofrekvenčne lastnosti navzdolnjih oddajnikov v sistemih zaključevanja kabelskih modemov (CMTS) in robnih kvadraturnih amplitudnih modulatorjih (EQAM) v skladu s standardom DOCSIS 3.0, da prodajalcem omogoča izdelavo naprav, ki ustrezajo potrebam kabelskih operaterjev po svetu. Poleg opredelitve zahtev za napravo DOCSIS 3.0 se lahko ta dokument uporablja tudi za druge naprave, kot so:
modulator EQAM, ki se ne uporablja za storitve DOCSIS 3.0, ali
integrirani sistem CMTS z več navzdolnjimi kanali na radiofrekvenčna vrata, ki je v skladu s prejšnjimi različicami standarda DOCSIS 3.0.
Med praksami načrtovanja kabelskega spektra, sprejetimi za različna omrežja po svetu, obstajajo razlike. Zato sta za tehnologijo fizične plasti vključeni dve enakovredni možnosti, pri čemer ni treba, da sta interoperabilni. Ena možnost temelji na navzdolnji večprogramski televizijski distribuciji, ki se uporablja v Severni Ameriki in pri kateri imajo kanali pasovno širino 6 MHz. Druga možnost temelji na ustrezni evropski večprogramski televizijski distribuciji. Obe možnosti imata enak status, čeprav struktura dokumenta ne odraža njune enakovrednosti. Prva možnost je opredeljena v točkah 5, 6 in 7, druga pa z zamenjavo vsebine omenjenih točk z dodatkom A. Skladno s tem [4] in [2] veljata le za prvo možnost,standard EN 300 429 [8] pa le za drugo. Skladnost s tem dokumentom pomeni skladnost z eno opisano izvedbo in ne z obema. Interoperabilnost opreme, izdelane v skladu s prvo možnostjo, z opremo, izdelano v skladu z drugo možnostjo, ni zahtevana.
Naprava, skladna z vmesnikom DRFI, je lahko naprava s samo enim kanalom, lahko pa je naprava z več kanali, ki lahko izdela en navzdolnji radiofrekvenčni nosilni signal ali več hkrati na enih radiofrekvenčnih izhodnih vratih. EQAM je lahko modul modularnega sistema zaključevanja kabelskih modemov (M-CMTS) ter se uporablja za zagotavljanje hitre podatkovne storitve ali služi kot sestavni del sistema digitalnega videa ali videa na zahtevo (VoD), ki naročnikom zagotavlja visokokakovostni digitalni video. Te specifikacije so izdelane za omogočanje uporabe modulatorja EQAM brez omejitev v posameznem načinu zagotavljanja storitev ali sočasno v obeh načinih zagotavljanja storitev. »Sočasno« pri začetnih izvedbah pomeni, da se lahko po nekaterih kanalih prenašajo podatki z visoko hitrostjo, po drugih pa digitalni video, če imajo radiofrekvenčna izhodna vrata več kanalov QAM. Ta dokument omogoča prihodnje načine uporabe, pri katerih se lahko pasovna širina posameznega kanala QAM v istem transportnem toku MPEG razdeli med podatke z visoko hitrostjo in digitalni video. To pomeni, da bo modulator EQAM sprejel vhodni signal prek povezave Ethernet, vhodne podatke integriral v transportni tok MPEG, moduliral enega izmed številnih radiofrekvenčnih nosilnih signalov glede na te specifikacije ter ga poslal v izhodni priključek, ki je v skupni rabi z vsemi modulatorji. Verjetno bi se en radiofrekvenčni kanal modulatorja EQAM lahko uporabljal sočasno za podatke in video. Radiofrekvenčni kanal modulatorja EQAM se lahko uporablja za podatke in video, ker navzdolnji kanali za digitalni video in podatke DOCSIS temeljijo na dodatku B priporočila ITU-T J.83 [4] za kabelska omrežja v Severni Ameriki in standardu EN 300 429 [8] za kabelska omrežja v Evropi. Pri navzdolnjih kanalih v skladu z dodatkom B priporočila ITU-T J.83 [4] je običajno edina razlika med radiofrekvenčnim kanalom modulatorja EQAM, ki deluje v video načinu, in radiofrekvenčnim kanalom modulatorja EQAM, ki deluje v načinu podatkov DOCSIS, globina prepletanja (glejte točki 6.3.1 in 6.3.3).

General Information

• Status: Published
• Publication Date: 22-Nov-2011
• Technical Committee: ATTM AT3 - Integrated broadband cable and television networks
• Current Stage: 12 - Completion
• Due Date: 15-Nov-2011
• Completion Date: 23-Nov-2011
• Ref Project: SIST EN 302 878-3 V1.1.1:2012 - Access, Terminals, Transmission and Multiplexing (ATTM) - Third Generation Transmission Systems for Interactive Cable Television Services - IP Cable Modems - Part 3: Downstream Radio Frequency Interface - DOCSIS 3.0

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Access, Terminals, Transmission and Multiplexing (ATTM) - Third Generation Transmission Systems for Interactive Cable Television Services - IP Cable Modems - Part 3: Downstream Radio Frequency Interface - DOCSIS 3.035.200Vmesniška in povezovalna opremaInterface and interconnection equipment35.180Terminalska in druga periferna oprema ITIT Terminal and other peripheral equipmentICS:Ta slovenski standard je istoveten z:EN 302 878-3 Version 1.1.1SIST EN 302 878-3 V1.1.1:2012en01-februar-2012SIST EN 302 878-3 V1.1.1:2012SLOVENSKI
STANDARD



SIST EN 302 878-3 V1.1.1:2012



ETSI EN 302 878-3 V1.1.1 (2011-11) Access, Terminals, Transmission and Multiplexing (ATTM); Third Generation Transmission Systems for Interactive Cable Television Services - IP Cable Modems; Part 3: Downstream Radio Frequency Interface; DOCSIS 3.0
European Standard SIST EN 302 878-3 V1.1.1:2012



ETSI ETSI EN 302 878-3 V1.1.1 (2011-11) 2
Reference DEN/ATTM-003006-3 Keywords access, broadband, cable, data, IP, IPCable, modem ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE
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Important notice Individual copies of the present document can be downloaded from: http://www.etsi.org The present document may be made available in more than one electronic version or in print. In any case of existing or perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF). In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at http://portal.etsi.org/tb/status/status.asp If you find errors in the present document, please send your comment to one of the following services: http://portal.etsi.org/chaircor/ETSI_support.asp Copyright Notification No part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 2011. All rights reserved.
DECTTM, PLUGTESTSTM, UMTSTM and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members. 3GPPTM and LTE™ are Trade Marks of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association. SIST EN 302 878-3 V1.1.1:2012



ETSI ETSI EN 302 878-3 V1.1.1 (2011-11) 3 Contents Intellectual Property Rights . 5 Foreword . 5 1 Scope and purpose . 6 1.1 Scope . 6 1.2 Purpose of Document . 6 1.3 Use of References in the present document . 7 1.4 Requirements . 7 2 References . 7 2.1 Normative references . 7 2.2 Informative references . 8 3 Definitions and abbreviations . 8 3.1 Definitions . 8 3.2 Abbreviations . 10 4 Void . 11 5 Functional Assumptions . 11 5.1 Broadband Access Network . 11 5.2 Equipment Assumptions . 11 5.2.1 Frequency Plan . 11 5.2.2 Compatibility with Other Services . 11 5.2.3 Fault Isolation Impact on Other Users . 12 5.3 Downstream Plant Assumptions . 12 5.3.1 Transmission Levels . 12 5.3.2 Frequency Inversion . 12 5.3.3 Analog and Digital Channel Line-up . 12 5.3.4 Analog Protection Goal . 12 6 Physical Media Dependent Sublayer Specification . 13 6.1 Scope . 13 6.2 EdgeQAM (EQAM) differences from CMTS . 13 6.3 Downstream . 14 6.3.1 Downstream Protocol . 14 6.3.2 Spectrum Format . 14 6.3.3 Scaleable Interleaving to Support Video and High-Speed Data Services . 14 6.3.4 Downstream Frequency Plan . 15 6.3.5 DRFI Output Electrical . 15 6.3.5.1 CMTS or EQAM Output Electrical . 16 6.3.5.1.1 Power per Channel CMTS or EQAM . 17 6.3.5.1.2 Independence of individual channel within the multiple channels on a single RF port . 18 6.3.5.1.3 Out-of-Band Noise and Spurious Requirements for CMTS or EQAM . 20 6.3.5.2 CMTS or EQAM Master Clock Jitter for Asynchronous Operation . 24 6.3.5.3 CMTS or EQAM Master Clock Jitter for Synchronous Operation . 25 6.3.5.4 CMTS or EQAM Master Clock Frequency Drift for Synchronous Operation. 25 6.3.6 CMTS or EQAM Clock Generation . 25 6.3.6.1 CMTS Clock Generation . 25 6.3.6.2 EQAM Clock Generation . 25 6.3.6.3 Downstream Symbol Rate . 25 6.3.7 Downstream Symbol Clock Jitter for Synchronous Operation . 26 6.3.8 Downstream Symbol Clock Drift for Synchronous Operation . 26 6.3.9 Timestamp Jitter . 26 7 Downstream Transmission Convergence Sublayer . 27 7.1 Introduction . 27 7.2 MPEG Packet Format . 27 7.3 MPEG Header for DOCSIS Data-Over-Cable . 27 7.4 MPEG Payload for DOCSIS Data-Over-Cable . 28 SIST EN 302 878-3 V1.1.1:2012



ETSI ETSI EN 302 878-3 V1.1.1 (2011-11) 4 7.4.1 stuff_byte . 28 7.4.2 pointer_field . 28 7.5 Interaction with the MAC Sublayer . 28 7.6 Interaction with the Physical Layer . 29 Annex A (normative): Additions and Modifications for European Specification . 30 A.1 Scope and purpose . 30 A.2 Void . 30 A.3 Terms and definitions . 30 A.4 Acronyms and abbreviations . 30 A.5 Functional Assumptions . 30 A.5.1 Broadband Access Network . 30 A.5.2 Equipment Assumptions . 31 A.5.2.1 Frequency Plan . 31 A.5.2.2 Compatibility with Other Services . 31 A.5.2.3 Fault Isolation Impact on Other Users . 31 A.5.3 Downstream Plant Assumptions . 31 A.5.3.1 Transmission Levels . 31 A.5.3.2 Frequency Inversion . 31 A.5.3.3 Analog and Digital Channel Line-up . 32 A.5.3.4 Analog Protection Goal . 32 A.6 Physical Media Dependent Sublayer Specification . 32 A.6.1 Scope . 32 A.6.2 EdgeQAM (EQAM) differences from CMTS . 32 A.6.3 Downstream . 32 A.6.3.1 Downstream Protocol . 32 A.6.3.2 Spectrum Format . 32 A.6.3.3 Scaleable Interleaving to Support Video and High-Speed Data Services . 32 A.6.3.4 Downstream Frequency Plan . 33 A.6.3.5 DRFI Output Electrical . 33 A.6.3.5.1 CMTS or EQAM Output Electrical . 33 A.6.3.5.1.1 Output Electrical per RF Port . 33 A.6.3.5.1.2 Power per Channel CMTS or EQAM . 34 A.6.3.5.1.3 Independence of individual channel within the multiple channels on a single RF port . 35 A.6.3.5.1.4 Out-of-Band Noise and Spurious Requirements for CMTS or EQAM . 37 A.6.3.5.2 CMTS or EQAM Master Clock Jitter for Asynchronous Operation . 41 A.6.3.5.3 CMTS or EQAM Master Clock Jitter for Synchronous Operation . 41 A.6.3.5.4 CMTS or EQAM Master Clock Frequency Drift for Synchronous Operation. 41 A.6.3.6 CMTS or EQAM Clock Generation . 42 A.6.3.6.1 CMTS Clock Generation . 42 A.6.3.6.2 EQAM Clock Generation . 42 A.6.3.6.3 Downstream Symbol Rate . 42 A.6.3.7 Downstream Symbol Clock Jitter for Synchronous Operation . 42 A.6.3.8 Downstream Symbol Clock Drift for Synchronous Operation . 43 A.6.3.9 Timestamp Jitter . 43 A.7 Downstream Transmission Convergence Sublayer . 43 A.7.1 Introduction . 43 A.7.2 MPEG Packet Format . 43 A.7.3 MPEG Header for DOCSIS Data-Over-Cable . 43 A.7.4 MPEG Payload for DOCSIS Data-Over-Cable . 43 A.7.5 Interaction with the MAC Sublayer . 43 A.7.6 Interaction with the Physical Layer . 43 Annex B (normative): DOCS-DRF-MIB . 44 History . 59
SIST EN 302 878-3 V1.1.1:2012



ETSI ETSI EN 302 878-3 V1.1.1 (2011-11) 5 Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (http://ipr.etsi.org). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This European Standard (EN) has been produced by ETSI Technical Committee Access, Terminals, Transmission and Multiplexing (ATTM). The present document is part 3 of a multi-part deliverable. Full details of the entire series can be found in part 1 [i.7].
National transposition dates Date of adoption of this EN: 14 November 2011 Date of latest announcement of this EN (doa): 29 February 2012 Date of latest publication of new National Standard or endorsement of this EN (dop/e):
31 August 2012 Date of withdrawal of any conflicting National Standard (dow): 31 August 2012
SIST EN 302 878-3 V1.1.1:2012



ETSI ETSI EN 302 878-3 V1.1.1 (2011-11) 6 1 Scope and purpose 1.1 Scope The present document defines the RF characteristics required in the downstream transmitter(s) of DOCSIS 3.0 CMTSs and EQAMs, sufficiently enough to permit vendors to build devices that meet the needs of cable operators around the world. In addition to defining these requirements for a DOCSIS 3.0 device, the present document could also be applicable to other devices such as: • an Edge QAM (EQAM) not being used for DOCSIS 3.0 services; or • an integrated Cable Modem Termination System (CMTS) with multiple downstream channels per RF port previous to DOCSIS 3.0. There are differences in the cable spectrum planning practices adopted for different networks in the world. Therefore two options for physical layer technology are included, which have equal priority and are not required to be interoperable. One technology option is based on the downstream multi-program television distribution that is deployed in North America using 6 MHz channelling. The other technology option is based on the corresponding European multi-program television distribution. Both options have the same status, notwithstanding that the document structure does not reflect this equal priority. The first of these options is defined in clauses 5, 6 and 7, whereas the second is defined by replacing the content of those clauses with the content of annex A. Correspondingly, [4] and [2] apply only to the first option, and EN 300 429 [8] only to the second. Compliance with the present document requires compliance with the one or the other of these implementations, not with both. It is not required that equipment built to one option will interoperate with equipment built to the other. A DRFI-compliant device may be a single-channel only device, or it may be a multiple-channel device capable of generating one or multiple downstream RF carriers simultaneously on one RF output port. An EQAM may be a module of a modular cable modem termination system (M-CMTS) and be used for delivering a high-speed data service or it may serve as a component of a digital video or Video-on-Demand (VoD) system, delivering high quality digital video to subscribers. These specifications are crafted to enable an EQAM to be used without restriction in either or both service delivery scenarios simultaneously. "Simultaneous" in the early deployments means that if a RF output port has multiple QAM channels, some channel(s) may be delivering high-speed data while some other channel(s) may be delivering digital video. The present document enables future uses, wherein a single QAM channel may share bandwidth between high-speed data and digital video in the same MPEG transport stream. Conceptually, an EQAM will accept input via an Ethernet link, integrate the incoming data into an MPEG transport stream, modulate one of a plurality of RF carriers, per these specifications, and deliver the carrier to a single RF output connector shared in common with all modulators. Conceivably, a single EQAM RF channel could be used for data and video simultaneously. The reason that an EQAM RF channel can be used for either is that both digital video and DOCSIS data downstream channels are based on ITU-T Recommendation J.83 [4], annex B for cable networks in North America and EN 300 429 [8] for cable networks deployed in Europe. On downstream channels complying to ITU-T Recommendation J.83 [4], annex B, typically, the only difference between an EQAM RF channel operating in a video mode and an EQAM RF channel operating in DOCSIS data mode is the interleaver depth (see clauses 6.3.1 and 6.3.3). DOCSIS data runs in a low latency mode using a shallow interleaver depth at the cost of some burst protection. DOCSIS data can do this because if a transmission error occurs, the higher layer protocols will request re-transmission of the missing data. For video, the sequence of frames in the program is both time sensitive and order sensitive and cannot be re-transmitted. For this reason, video uses a deeper interleaver depth to provide more extensive burst protection and deliver more of the program content without loss. The penalty video pays is in latency. The entire program content is delayed by a few milliseconds, typically, and is invisible to the viewers of the program. The conflicting demands for interleaver depth are what prevent a single EQAM RF channel from being used optimally for video and DOCSIS data simultaneously. A traditional integrated CMTS, however, is used solely for DOCSIS data. 1.2 Purpose of Document The purpose of the present document is to define the RF characteristics required in the downstream transmitter(s) of CMTSs and EQAMs, sufficiently enough to permit vendors to build devices that meet the needs of cable operators around the world. SIST EN 302 878-3 V1.1.1:2012



ETSI ETSI EN 302 878-3 V1.1.1 (2011-11) 7 1.3 Use of References in the present document The present document will not attempt to wholly replicate the normative references provided in the document. However, it will use extracted portions of said documents where it adds clarity to the present document. For fuller understanding of the present document, the most recent versions of [4] annex B or EN 300 429 [8], respectively, as well as ES 202 488-2 [1] should be available for reference. 1.4 Requirements Throughout the present document, the words that are used to define the significance of particular requirements are capitalized. These words are: "MUST" This word means that the item is an absolute requirement of this specification. "MUST NOT" This phrase means that the item is an absolute prohibition of this specification. "SHOULD" This word means that there may exist valid reasons in particular circumstances to ignore this item, but the full implications should be understood and the case carefully weighed before choosing a different course. "SHOULD NOT" This phrase means that there may exist valid reasons in particular circumstances when the listed behaviour is acceptable or even useful, but the full implications should be understood and the case carefully weighed before implementing any behaviour described with this label. "MAY" This word means that this item is truly optional. One vendor may choose to include the item because a particular marketplace requires it or because it enhances the product, for example; another vendor may omit the same item.
2 References References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the reference document (including any amendments) applies. Referenced documents which are not found to be publicly available in the expected location might be found at http://docbox.etsi.org/Reference. NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee their long term validity. 2.1 Normative references The following referenced documents are necessary for the application of the present document. [1] ETSI ES 202 488-2: "Access and Terminals (AT); Second Generation Transmission Systems for Interactive Cable Television Services - IP Cable Modems; Part 2: Radio frequency interface specification". [2] CEA-542-C (February 2009): "Cable Television Channel Identification Plan". [3] ANSI/SCTE 02 (2006): "Specification for "F" Port, Female, Indoor". [4] ITU-T Recommendation J.83 (2007), Annex B: "Digital multi-programme systems for television, sound and data services for cable distribution". [5] ISO/IEC 13818-1 (2007): "Information technology -- Generic coding of moving pictures and associated audio information: Systems". [6] Cable Television Laboratories, Inc. CM-SP-RFIv2.0-C02-090422 (April 2009): "Data-Over-Cable Service Interface Specifications - DOCSIS 2.0 - Radio Frequency Interface Specification". SIST EN 302 878-3 V1.1.1:2012



ETSI ETSI EN 302 878-3 V1.1.1 (2011-11) 8 [7] IEC 61169-24 (2009): "Radio-frequency connectors - Part 24: Sectional specification - Radio frequency coaxial connectors with screw coupling, typically for use in 75 ohm cable networks (type F)". [8] ETSI EN 300 429: "Digital Video Broadcasting (DVB); Framing structure, channel coding and modulation for cable systems". 2.2 Informative references The following referenced documents are not necessary for the application of the present document but they assist the user with regard to a particular subject area. [i.1] Cable Television Laboratories, Inc. SP-CMTS-NSII01-960702 (July 1996): "Data Over Cable Interface Specifications - Cable Modem Termination System - Network Side Interface Specification". [i.2] Cable Television Laboratories, Inc. CM-SP-M-OSSI-I08-081209 (December 2008): "Data-Over-Cable Service Interface Specifications - Modular Headend Architecture - M-CMTS Operations Support System Interface Specification". [i.3] Cable Television Laboratories, Inc. CM-SP-CMCI-C01-081104 (November 2008): "Data-Over-Cable Service Interface Specifications - Cable Modem to Customer Premise Equipment Interface". [i.4] Cable Television Laboratories, Inc. CM-SP-DEPI-I08-100611 (June 2010): "Data-Over-Cable Service Interface Specifications - Modular Headend Architecture - Downstream External PHY Interface Specification". [i.5] Cable Television Laboratories, Inc. CM-SP-DTI-I05-081209 (Decembe
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