TS 101 272 V1.1.1 (1998-06) Technical Specification Transmission and Multiplexing (TM); Optical Access Networks (OANs) for evolving services; ATM Passive Optical Networks (PONs) and the transport of ATM over digital subscriber lines 2 TS 101 272 V1.1.1 (1998-06) Reference DTS/TM-03024 (bs000icr.PDF) Keywords access, ADSL, architecture, ATM, B-ISDN, broadband, network, PON, SDH, transmission, VDSL ETSI Postal address F-06921 Sophia Antipolis Cedex - FRANCE Office address 650 Route des Lucioles - Sophia Antipolis Valbonne - 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 à but non lucratif enregistrée à la Sous-Préfecture de Grasse (06) N° 7803/88 Internet [email protected] http://www.etsi.fr http://www.etsi.org 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 1998. All rights reserved. ETSI 3 TS 101 272 V1.1.1 (1998-06) Contents Intellectual Property Rights................................................................................................................................9 Foreword ............................................................................................................................................................9 1 Scope......................................................................................................................................................10 2 References..............................................................................................................................................10 3 Abbreviations.........................................................................................................................................13 4 Overview of optical access networks.....................................................................................................15 4.1 General considerations..................................................................................................................................... 15 4.2 Interfaces to the AN......................................................................................................................................... 16 4.2.1 SNIs............................................................................................................................................................ 17 4.2.2 UNIs........................................................................................................................................................... 18 4.2.3 AN management interfaces ........................................................................................................................ 18 4.3 Elements of ANs.............................................................................................................................................. 18 5 Evolution of existing networks ..............................................................................................................19 6 ATM PON specifications.......................................................................................................................20 6.1 TDM/TDMA solution...................................................................................................................................... 20 6.2 FDM/FDMA solution ...................................................................................................................................... 20 7 ATM transport over xDSL.....................................................................................................................21 7.1 Scope ............................................................................................................................................................... 21 7.2 Specific Reference model ................................................................................................................................ 21 7.2.1 Functional decomposition .......................................................................................................................... 21 7.2.1.1 The α and β interfaces.......................................................................................................................... 21 7.3 Transport requirements .................................................................................................................................... 23 7.3.1 General....................................................................................................................................................... 23 7.3.2 Channelization............................................................................................................................................ 24 7.3.3 Information flows....................................................................................................................................... 24 7.3.3.1 Elemental information flows across the α and β interfaces .................................................................. 24 7.3.3.1.1 Data flow......................................................................................................................................... 24 7.3.3.1.2 Synchronization flow ...................................................................................................................... 24 7.3.3.1.3 Link Control flow............................................................................................................................ 25 7.3.3.1.4 Link Performance and Path Characterization flow.......................................................................... 25 7.3.3.1.4.1 Loopback for asymmetric xDSL................................................................................................ 25 7.3.3.1.5 xDSL TPS-TC performance- Transport means...............................................................................25 7.3.3.2 Other Information flows ....................................................................................................................... 26 7.3.4 Protocols .................................................................................................................................................... 26 7.4 Quality of Service (QoS) ................................................................................................................................. 27 7.4.1 Data Rates .................................................................................................................................................. 27 7.4.2 BER............................................................................................................................................................ 28 7.5 System Issues................................................................................................................................................... 28 7.6 Description of functional blocks ...................................................................................................................... 28 7.6.1 Access Node ATM layer functions ............................................................................................................ 28 7.6.2 ATM Transport Protocol Specific Transmission Convergence (TPS-TC)................................................ 28 7.6.2.1 ADSL ATM TPS-TC............................................................................................................................ 28 7.6.2.2 VDSL ATM TPS-TC ........................................................................................................................... 28 7.6.2.3 Other xDSL ATM TPS-TC .................................................................................................................. 28 Annex A (normative): TDMA-based ATM PON specification........................................................29 A.1 Architecture of the optical access network ............................................................................................29 A.1.1 Network architecture........................................................................................................................................ 29 A.1.1.1 FTTCab/C/B Scenario................................................................................................................................ 29 A.1.1.2 FTTH Scenario........................................................................................................................................... 30 A.1.2 Reference configuration................................................................................................................................... 30 ETSI 4 TS 101 272 V1.1.1 (1998-06) A.1.2.1 Service Node Interface............................................................................................................................... 31 A.1.2.2 Interfaces at the reference points S/R and R/S ........................................................................................... 31 A.1.3 Functional blocks............................................................................................................................................. 31 A.1.3.1 Optical Line Termination ........................................................................................................................... 31 A.1.3.2 Optical Network Unit ................................................................................................................................