XDSL体系结构

Introduction

Targeted Audience

Benefits for the Reader

Organization of the Book

Author’s Disclaimer

Acronyms and Abbreviations

PART1 BACKGROUND

Chapter1 Evolution to Broadband

Introduction

What Is a Communications Network？

Architecture of Communication Networks

Categorization of Communication

Networks Based on Topology

Categorization of Communication Networks

Based on Traffic Transport Mechanisms

Categorization of Communication

Networks Based on Functional Area

Categorization of Communication

Networks Based on Dominant Applications

Telecommunications Networks

History of Telecommunications Networks

Architecture of Telecommunications Networks

Data Communications Networks

History of Data Communications Networks

Architecture of Data Communications Networks

Video Networks

History of Video Networks

Architecture of Video Networks

Broadband Networks——The Convergence of Networks for High-Speed Communications

Technological, Economic, and Regulatory Drivers for Convergence

Technological Drivers

Regulatory Drivers

Economic Drivers

Evolutionary Process Toward Convergence

Applications of Broadband Networks

Internet Access

Imaging

Summary

References

Chapter2 Broadband Access Technologies and Architectures

Overview

Needs of Customers, Service Providers, and Equipment Manufacturers

Needs of Customers

Needs of Service Providers

Needs of Equipment Manufacturers

Key Requirements

Affordable Access

Ubiquitous Access

High-speed Access

Broadband Access Technologies

Copper-Loop Access Technologies（XDSL）

Cable Access Technologies

Satellite Technology

Broadband Access Architecture

IDLC（Integrated Digital Loop Carrier）

Hybrid Fiber/Coax（HFC）

Fiber-to-the-Curb（FTTC）adn Other Fiber Architectures

LMDS

MMDS

DBS Architecture

Analysis of Broadband Technologies and Architectures

Summary

References

PART2 DSL TECHNOLOGIES

Chapter3 Fundamentals of Copper-Loop Transmission

Overview

Background of PSTN Technology

Information, Data, and Signals

Analog Signals

Conversion of Human Voice into Analog Signals

The PSTNand Analog Transmission

Evolution of the PSTN Core to Digital Transmission

Challenges and Limitations of the PSTN Access Network for Data Transmission

Signal Attenuation Due to Distance

Noisy Environment

Legacy of the Voice Access Network Architecture

Techniques to Overcome the Challenges and Limitations of the PSTN Access Network

Line Coding and Modulation/Demodulation

Error Control

Data Compression

Advanced Techniques

Echo Cancellation

Multi-dimensional Trellis Coding

Shell Mapping（Constellation Shaping）

Fast Training

Evolution of Modem Technology and Standards to DSL

Simultaneous POTS and DSL Service

Summary

References

Chapter4 ADSL and ADSL Lite

Background

History

Basic Network Architecture

Applications

Standards and Working Group Activities

Technology Discussion

Modulation Schemes

ANSI T1.413 Standard Overview

ADSL System Reference Model

ADSL Transport Classes

ADSL Overhead

ADSL Framing

Initialization

Fast Retraining for ADSL Lite

Power Management for ADSL Lite

Differences between T1.413i2, G.dmt, and G.lite

Current State of the Technology

Deployment Issues and Possible Solutions

Interoperability Efforts

Trials and Deployments

Future Directions

Summary

References

Chapter5 HDSL and HDSL2

Background

History

Basic Network Acrhitecture

Applications

Standards Activities

Technology Discussion

Modulation Schemes

Overview of the Draft HDSL2 Standard

HDSL2 System Reference Model

H2TU Transceiver Reference Model

H2TU DS1 TC Layer Functional Characteristics

Initialization

Data Mode

Operations, Administration, Maintenance, and Provisioning（OAM&P）

Current State of the Technology

Deployment Issues and Possible Solutions

Trials and Deployments

Future Directions

Summary

References

Chapter6 VDSL

Background

Histoyr

Basic Network Architecture

Applications

Standards and Special-Interest Group Activities

Technology Discussion

Modulation Schemes

Upstream Multiplexing

VDSL Proposals

ANSI Requirements Documents

VDSL Reference Model

VDSL Data Rates

VDSL Activation and States

Current State of the Technology

Deployment Issues and Possible Solutions

Future Directions

Summary

References

Chapter7 Fundamentals of Higher-Layer Technologies

Overview

Asynchronous Transfer Mode（ATM）

Principles of ATM

Advantages（and Disadvantages）of ATM

ATM Standards

ATM Protocol Model

ATM Addressing

ATM Signaling

ATM Operations, Administration, and Maintenance（OAM）

Transmission Control Protocol/Internet

Protocol（TCP/IP）

TCP/IP Standards

TCP/IP Protocol Architecture

PPP and Tunneling

PPP and the OSI Layer

PPP Initialization

PPP Data Transfer

PPP and Tunneling

Tunneling Protocols

Tunnel Establishment

Differences between Traditional Dial-up and Tunneling

Audio Compression

G.7xx Series of ITU Standards

ADPCM

CELP

Video Compression

Joint Photographic Experts Group（JPEG）Standard

H.261 Developed by the ITU

MPEG-1 Developed by ISO/IEC

MPEG-2 Developed by ISO/IEC

MPEG-4 Developed by ISO/IEC

Vodeoconferencing

H.32x Series of Standards Developed by the ITU

Summary

References

PART3 DSL ARCHITECTURE

Chapter8 Premises and Access Network Architectures

Overview

Premise Network Architecture Requirements

CPE Configuration Requirements

U-interface Requirements

Service Definition Requirements

Proposed Premises Network Architectures

Single Host, Internal DSL Modem

Multiple Hosts, Internal DSL Modem

Single/Multiple Host（s）, External DSL Modem Over ATM-based Premises Distribution

Single/Multiple Host（s）, External DSL Modem Over Non-ATM Based Premises Distribution

Multiple Hosts, Any Media Premises Distribution Using Routing

Functions of the Access Network

User Port Functions

Service Port Functions

Core Functions

Transport Functions

Access Network System Management Functions

Network Elements of a DSL-based Access Architecture

Customer Premises Equipment（CPE）

Access Loop

Colocation or Central Office Equipment

Transport

Switch/Point-of-presence Location

Common Access Architectures

Integrated Digital Loop Carrier（IDLC）

Fiber-to-the-node（FTTN）and Other Fiber-based Loop Architectures（FTTC, FTTH, and FTTB）

CLEC Architecture

Architectural Issues

Operational

Economic

Regulatory

G.lite Specific Issues

Rate Change Due to Splitterless Operation

Maintaining a Network Presince during

Reinitialization

Future Directions

Summary

References

Chapter9 Service Architecture

Overview

Reference Architecture

Service and Higher-layer Architecture

Voice Services and Architecture

Protocol Stack

Key Architecture Element

Architecture Requirements

Architecture Issues

Data Services and Architecture

Protocol Stack

Architecture Requirements

Architecture Issues

Video Services and Architecture

Protocol Stack

Architecture Requirements

Architecture Issues

Full Integrated Services（Integrated Voice, Data, Video）

Protocol Stack

Architecture Requirements

ATM-based Access Network Performance

Architecture Issues

Impact of DSL-based Services on Operational Processes

Summary

References

Chapter10 Broadband Access Network Design

Overview

Broadband Access Network Definition

Network Design Requirements for Broadband Access

Traffic

Protocol

Architecture

Services, Features, and Functions

Access Route Diversity

DSL-based Access Network Design

Traffic Engineering

Access Technology Selection

Link or Transmission Network Design

Broadband DSLAM Node Design

Broadband Access Network Topologies

Physical Star/Logical Star Topology

Physical Ring/Logical Star

Physical Star/Logical Ring

Summary

AppendixA Telecom Operating Companies Pursuing DSL

AppendixB Regulators

AppendixC Telecommunications

Journals and Magazines

Journals and Other Electronic Media

Index