1、 ETSI TS 102 639-2 V1.1.1 (2009-04)Technical Specification Access and Terminals, Transmission and Multiplexing (ATTM);Third Generation Transmission Systems forInteractive Cable Television Services - IP Cable Modems;Part 2: Physical LayerITU-T Recommendation J.222.1 (07/2007), modifiedETSI ETSI TS 10
2、2 639-2 V1.1.1 (2009-04) 2 Reference DTS/ATTM-02006-2 Keywords access, broadband, cable, endorsement, MAC, modem ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association but non lucratif enreg
3、istre la Sous-Prfecture de Grasse (06) N 7803/88 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 conten
4、ts 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
5、 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/
6、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 2009. All rights reserved. DECTTM, PLUGTESTSTM, UMTS
7、TM, TIPHONTM, the TIPHON logo and the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members. 3GPPTM is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. LTE is a Trade Mark of ETSI currently being registered for the benefit
8、of its Members and of the 3GPP Organizational Partners. GSM and the GSM logo are Trade Marks registered and owned by the GSM Association. ETSI ETSI TS 102 639-2 V1.1.1 (2009-04) 3 Contents Intellectual Property Rights4 Foreword.4 Introduction 4 1 Scope 5 2 References 6 2.1 Normative references .6 2.
9、2 Informative references6 3 Definitions and abbreviations.7 3.1 Definitions7 3.2 Abbreviations .9 Endorsement notice 9 Modifications to ITU-T Recommendation J.222.1 .9 Annex A (informative): Bibliography.10 History 11 ETSI ETSI TS 102 639-2 V1.1.1 (2009-04) 4 Intellectual Property Rights IPRs essent
10、ial 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 potentiall
11、y 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:/webapp.etsi.org/IPR/home.asp). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by
12、 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 Technical Specification (TS) has been produced by ETSI Technical Committe
13、e Access, Terminals, Transmission and Multiplexing (ATTM). Introduction This European Standard (Cable DOCSIS 3.0 Network series) has been produced by ETSI Access, Terminals, Transmission and Multiplexing Technical Committee (ATTM), Cable Access Network sub-group. The present document is part 2 of a
14、multi-part deliverable covering Third Generation Transmission Systems for Interactive Cable Television Services - IP Cable modems. Full details of the entire series can be found in part 1 i.1. ETSI ETSI TS 102 639-2 V1.1.1 (2009-04) 5 1 Scope The present document defines the physical layer requireme
15、nts as part of a series of specifications for the third generation of high-speed Data-Over-Cable Systems Interface Specifications (DOCSIS). They were developed for the benefit of the cable industry, including contributions by operators and vendors from, Europe, North America and other regions. The s
16、ource material for the present document was provided by the ITU-T Recommendation J.222.1 5 for which the most recent version can be found at http:/www.itu.int/ITU-T/. There are differences in the cable spectrum planning practices adopted for different networks in the world. Therefore two definitions
17、 for physical layer technology are included, which have equal priority and are not required to be interoperable. One technology definition is based on the downstream multi-programme television distribution that is deployed using 8 MHz channelling, and supports upstream transmission in the 5 MHz to 6
18、5 MHz region. The second technology definition is based on a multi-programme television distribution using 6 MHz channel spacing and supports upstream in the 5 MHz to 42 MHz region. Both options have equal status. The choices of physical-layer technologies allow operators some flexibility within any
19、 frequency planning, EMC and safety requirements that are mandated for their area of operation. EXAMPLE: The 6 MHz downstream-based option might be deployable within an 8 MHz channel plan. It is the network operators choice of which technology definition to deploy. NOTE: The current document referen
20、ces both physical layer technologies and where there are parameter differences both are specified for both options: i) 8 MHz channel spacing; and. ii) 6 MHz channel spacing. All optional physical-layer technologies are required to be backwards compatible with the earlier versions of those options de
21、fined in ES 201 488 i.4 and ES 202 488 i.5. Requirements for EMC and safety are outside the scope of the present document. EMC and safety standards for European applications are published by CENELEC. NOTE 1: Examples of such CENELEC product safety standards are EN 60950 i.6 and EN 50083-1 i.6. NOTE
22、2: For CENELEC safety categories of interfaces, see EG 201 212 i.2. NOTE 3: Examples of such CENELEC product EMC standards are EN 50081-1 i.7, EN 50082-1 i.8 and EN 50083-2 i.3. ETSI ETSI TS 102 639-2 V1.1.1 (2009-04) 6 2 References References are either specific (identified by date of publication a
23、nd/or edition number or version number) or non-specific. For a specific reference, subsequent revisions do not apply. Non-specific reference may be made only to a complete document or a part thereof and only in the following cases: - if it is accepted that it will be possible to use all future chang
24、es of the referenced document for the purposes of the referring document; - for informative references. 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 wer
25、e valid at the time of publication ETSI cannot guarantee their long term validity. 2.1 Normative references The following referenced documents are indispensable for the application of the present document. For dated references, only the edition cited applies. For non-specific references, the latest
26、edition of the referenced document (including any amendments) applies. 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 ETSI TS 102 639-3: “Access a
27、nd Terminals, Transmission and Multiplexing (ATTM); Third Generation Transmission Systems for Interactive Cable Television Services - IP Cable Modems; Part 3: Downstream Interface ITU-T Recommendation J.210 (11/2006), modified“. 3 ETSI TS 102 639-4: “Access and Terminals, Transmission and Multiplexi
28、ng (ATTM); Third Generation Transmission Systems for Interactive Cable Television Services - IP Cable Modems; Part 4: MAC and Upper Layer Protocols ITU-T Recommendation J.222.2 (07/2007), modified“. 4 ETSI TS 102 639-5: “Access and Terminals, Transmission and Multiplexing (ATTM); Third Generation Tr
29、ansmission Systems for Interactive Cable Television Services - IP Cable Modems; Part 5: Security Services ITU-T Recommendation J.222.3 (07/2007), modified“. 5 ITU-T Recommendation J.222.1: “Third-generation transmission systems for interactive cable television services - IP cable modems: Physical la
30、yer specification“. 2.2 Informative references The following referenced documents are not essential to the use of the present document but they assist the user with regard to a particular subject area. For non-specific references, the latest version of the referenced document (including any amendmen
31、ts) applies. i.1 ITU-T Recommendation J.214 (2007): “Cable modem TDM emulation interface“. i.2 ETSI EG 201 212: “Electrical safety; Classification of interfaces for equipment to be connected to telecommunication networks“. i.3 CENELEC EN 50083-2:2006: “Cable networks for television signals, sound si
32、gnals and interactive services - Part 2: Electromagnetic compatibility for equipment“. i.4 ETSI ES 201 488: “Access and Terminals (AT); Data Over Cable Systems“. ETSI ETSI TS 102 639-2 V1.1.1 (2009-04) 7 i.5 ETSI ES 202 488: “Access and Terminals (AT); Second Generation Transmission Systems for Inte
33、ractive Cable Television Services - IP Cable Modemsl“. i.6 EN 60950: “Information technology equipment - Safety“. i.7 BS EN 61000-6-3:200: “Electromagnetic compatibility (EMC). Generic standards. Emission i.8 BS EN 61000-6-4:2001: “Electromagnetic compatibility (EMC). Generic standards. Emission sta
34、ndard for industrial environments“. i.9 ITU-T Recommendation J.222.2: “MAC and Upper Layer protocols for third-generation transmission systems for interactive cable television services - IP cable modems“. i.10 ITU-T Recommendation J.210: “Downstream RF Interface for Cable Modem Termination Systems“.
35、 i.11 ITU-T Recommendation J.222.3: “ Third-generation transmission systems for interactive cable television services - IP cable modems: Security services“. i.12 ITU-T Recommendation J.112: “Transmission systems for interactive cable television services“. i.13 ITU-T Recommendation J.122: “ Second-ge
36、neration transmission systems for interactive cable television services - IP cable modems“. i.14 ITU-T Recommendation J.83, Annex B: “Digital multi-programme systems for television, sound and data services for cable distribution, Annex B - Digital multi-programme system B“. 3 Definitions and abbrevi
37、ations 3.1 Definitions For the purposes of the present document, the following terms and definitions apply: active codes: set of spreading codes which carry information in an S-CDMA upstream NOTE: The complementary set, the unused codes, are idle and are not transmitted. Reducing the number of activ
38、e codes below the maximum value of 128 may provide advantages including more robust operation in the presence of coloured noise. allocation: group of contiguous mini-slots in a MAP which constitutes a single transmit opportunity bandwidth allocation map (MAP): MAC management message that the CMTS us
39、es to allocate transmission opportunities to cable modems Capture BandWidth (CBW): sum of the tuning bands in the TB list in MHz channel bonding: logical process that combines the data packets received on multiple independent channels into one higher-speed data stream NOTE: Channel bonding can be im
40、plemented independently on upstream channels or downstream channels. demodulator module: physical entity in the CM that demodulates a block of one or more contiguous channels of a single bandwidth (6 MHz or 8 MHz) within the output from a single tuner DOCSIS 1.x: Abbreviation for “DOCSIS 1.0 or 1.1“
41、. DOCSIS stands for data-over-cable service interface specifications extended upstream frequency range: optional upstream frequency range over which a CM may be capable of transmitting NOTE: In the technology option that uses 6 MHz downstream channelization, this is 5-85 MHz. In the technology optio
42、n that uses 8 MHz downstream channelization, no extended upstream frequency range is defined. ETSI ETSI TS 102 639-2 V1.1.1 (2009-04) 8 interval usage code (IUC): field in MAPs and UCDs to link burst profiles to grants maximum downstream bonded channels (MDBC): maximum number of downstream bonded ch
43、annels supported by the cable modem NOTE: See channel bonding. number of allocated codes: total number of codes which a single CM uses in a single S-CDMA frame NOTE: This number is determined by the size of the grants in mini-slots and the mapping of these mini-slots to S-CDMA frames (note that a CM
44、 may receive multiple grants which are mapped to a single S-CDMA frame). The number of allocated codes can be in the range of the number of codes per mini-slot to the number of active codes, and may vary from frame to frame, but is constant within an S-CDMA frame. S-CDMA frame: two-dimensional repre
45、sentation of mini-slots, where the dimensions are codes and time NOTE: An S-CDMA frame is composed of p active codes in the code dimension and K spreading intervals in the time dimension. Within the S-CDMA frame, the number of mini-slots is determined by the number of codes per mini-slot (c) and p,
46、the number of active codes in the S-CDMA frame. Each S-CDMA frame thus contains s mini-slots, where s = p/c, and each mini-slot contains c*K information (QAM) symbols. S-CDMA subframe: subframe is a vertically-smaller subset of an S-CDMA frame over which interleaving is performed, where the vertical
47、 dimension is R codes, where R p (the number of active codes) NOTE: A subframe is generally used to constrain the interleaving region to be of a similar size to the Reed-Solomon codeword in order to provide protection from impulse noise. Selectable Active Codes (SAC): methodology to determine the se
48、t of active codes and its complement, the set of unused codes. In SAC mode 1, a consecutive set of codes starting with code 0 are unused. NOTE: In SAC mode 2, the active codes are selectable via a 128-bit string. spread symbol: output of the spreader, a group of 128 chips which comprises a single S-
49、CDMA spreading code, and is the result of spreading a single information (QAM constellation) symbol, which is referred to as a “spread symbol“ spreader-off S-CDMA burst: transmission from a single CM in a spreader-off frame on an S-CDMA channel defined by the time in which the cable modems transmitter turns on to the time it turns off NOTE: There will generally be several spreader off bursts in a spreader-off frame. spreader-off S-CDMA frame: TDMA mini-slots on an S-CDMA channel in which the spreader
