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Aspects of VDSL Evolution DSL Forum Technical Report TR-040 (Formerly WT-047v8) Aspects of VDSL Evolution June 2001 Abstract: This document provides a framework for VDSL study within the DSL Forum. It points to the standards which define VDSL requirements and interfaces. It also identifies deployment scenarios that are expected to be implemented and characterizes the service evolution from other DSL technologies to those based on VDSL. Additionally, challenges to deployment are considered. Notice: © 2001 Digital Subscriber Line Forum. All Rights Reserved. DSL Forum documents may be copied, downloaded, stored on a server or otherwise redistributed in their entirety only. Notwithstanding anything to the contrary, DSL Forum makes no representation or warranty, expressed or implied, concerning this publication, its contents or the completeness, accuracy, or applicability of any information contained in this publication. No liability of any kind shall be assumed by DSL Forum as a result of reliance upon any information contained in this publication. DSL Forum does not assume any responsibility to update or correct any information in this publication. The receipt or any use of this document or its contents does not in any way create by implication or otherwise any express or implied license or right to or under any patent, copyright, trademark or trade secret rights which are or may be associated with the ideas, techniques, concepts or expressions contained herein. Aspects of VDSL Evolution DSL Forum TR-040 1 INTRODUCTION ................................................................................................................................ 3 2 REFERENCES ..................................................................................................................................... 3 3 GLOSSARY .......................................................................................................................................... 3 4 WHAT IS VDSL................................................................................................................................... 4 4.1 WHERE WILL VDSL BE USED.......................................................................................................... 4 4.2 WHY WILL VDSL BE USED.............................................................................................................. 5 5 VDSL STANDARDIZATION ............................................................................................................. 5 5.1 STATUS............................................................................................................................................ 6 5.1.1 Technology ............................................................................................................................. 6 5.1.2 Regulatory .............................................................................................................................. 7 5.1.3 Interoperability....................................................................................................................... 8 5.2 BACKGROUND TO STANDARDIZATION EFFORTS.............................................................................. 8 6 VDSL SERVICE CHARACTERISTICS ......................................................................................... 10 6.1 VDSL REQUIREMENTS.................................................................................................................. 10 6.2 VDSL CHARACTERISTICS ............................................................................................................. 10 6.2.1 Rate versus Reach................................................................................................................. 10 6.2.2 Bit Error Ratio...................................................................................................................... 11 6.2.3 Latency ................................................................................................................................. 11 6.2.4 Spectral Compatibility.......................................................................................................... 11 7 SERVICE EVOLUTION TO VDSL................................................................................................. 12 7.1 SERVICE MIGRATION..................................................................................................................... 12 7.2 SERVICE EVOLUTION ON GREEN FIELD SITES ............................................................................... 12 7.2.1 Factors enabling VDSL Service on Green Field Sites.......................................................... 13 7.2.2 Challenges to VDSL Service on Green Field Sites ............................................................... 13 7.3 SERVICE EVOLUTION ON EXISTING PLANT .................................................................................... 13 7.3.1 Factors enabling VDSL Service on Existing Plant............................................................... 14 7.3.2 Challenges to VDSL Service on Existing Plant .................................................................... 14 7.4 TWO STAGE EVOLUTION OF VDSL SERVICES ............................................................................... 14 7.5 VDSL ENABLED SERVICES ........................................................................................................... 14 8 DEPLOYMENT SCENARIOS ......................................................................................................... 15 8.1 EXAMPLE DEPLOYMENTS.............................................................................................................. 15 8.1.1 Public Broadband Access Networks..................................................................................... 15 8.1.2 Campus Environment ........................................................................................................... 16 8.1.3 Multi-tenant Environment..................................................................................................... 17 8.1.4 Home Networking ................................................................................................................. 19 8.2 NETWORK TOPOLOGIES................................................................................................................. 19 8.2.1 Star Networks ....................................................................................................................... 20 8.2.2 Point-to-Point....................................................................................................................... 20 8.2.3 Mesh Networks ..................................................................................................................... 20 9 REGULATORY BARRIERS AND RELATED ISSUES................................................................ 20 9.1 UNBUNDLING ................................................................................................................................20 9.2 EMC ............................................................................................................................................. 20 9.3 RF INGRESS AND EGRESS FROM UNSHIELDED WIRE ..................................................................... 21 9.4 UNREGULATED INTERFERENCE ISSUES .......................................................................................... 22 2 Aspects of VDSL Evolution DSL Forum TR-040 1 Introduction This document provides a framework for VDSL study within the DSL Forum. It points to the standards which define VDSL requirements and interfaces. It also identifies deployment scenarios, utilizing the public network, that are expected to be implemented and characterizes the service evolution from other DSL technologies to those based on VDSL. Additionally, challenges to deployment are considered. VDSL applications utilizing private networks are outside the scope of this document. 2 References At the time of publication, the editions indicated were valid. All references are subject to revision. [1] Committee T1 Working Group Contribution T1E1.4/2000-009R3 (LB941) “Very-high-bit-rate Digital Subscriber Line (VDSL) Metallic Interface, Part 1: Functional Requirements and Common Specification”, November 2000 [2] Committee T1 Working Group Contribution T1E1.4/2000-011R3 (LB941) “VDSL Technical Specification, Part 2: Technical Specification for a Single-Carrier Modulation (SCM) Transceiver”, November 2000 [3] Committee T1 Working Group Contribution T1E1.4/2000-013R4 (LB941) “Very-high bit-rate Digital Subscriber Lines (VDSL) Metallic Interface, Part 3: Technical Specification of a Multi-Carrier Modulation (MCM) Transceiver”, November 2000 [4] ETSI TS 101 270-1 Ver. 1.2.1 “Transmission and Multiplexing (TM); Access transmission systems on metallic access cables; Very high speed Digital Subscriber Line (VDSL); Part 1: Functional requirements”, 1999-10 [5] ETSI TS 101 270-2 Ver. 1.1.1 “Transmission and Multiplexing (TM); Access transmission systems on metallic access cables; Very high speed Digital Subscriber Line (VDSL); Part 2: Transceiver specification”, 2001-02 [6] FSAN Full Services Access Network Requirements Specification Issue 3, 1998-08-18 [7] Radiocommunications Agency draft MPT 1570 “Radiation Limits and Measurement Standard, Electromagnetic radiation from telecommunications systems operating over material substances in the frequency range 9 kHz to 300 MHz”, April 2000 [8] Federal Communications Commission, Code of Federal
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